Coverage default.go (#330)

Coverage default.go

Added tests for default.go. The tests are successful

Co-authored-by: Aleksandr Tolstikhin <atolstikhin@mtsbank.ru>
Co-authored-by: Василий Толстов <v.tolstov@unistack.org>
Reviewed-on: #330
Reviewed-by: Василий Толстов <v.tolstov@unistack.org>
Co-authored-by: Александр Толстихин <tolstihin1996@mail.ru>
Co-committed-by: Александр Толстихин <tolstihin1996@mail.ru>

.gitea/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,18 @@
+---
+name: Bug report
+about: For reporting bugs in micro
+title: "[BUG]"
+labels: ''
+assignees: ''
+
+---
+
+**Describe the bug**
+
+1. What are you trying to do?
+2. What did you expect to happen?
+3. What happens instead?
+
+**How to reproduce the bug:**
+
+If possible, please include a minimal code snippet here.

.gitea/ISSUE_TEMPLATE/feature-request---enhancement.md

@@ -0,0 +1,17 @@
+---
+name: Feature request / Enhancement
+about: If you have a need not served by micro
+title: "[FEATURE]"
+labels: ''
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.gitea/ISSUE_TEMPLATE/question.md

@@ -0,0 +1,8 @@
+---
+name: Question
+about: Ask a question about micro
+title: ''
+labels: ''
+assignees: ''
+
+---

.gitea/autoapprove.yml

@@ -0,0 +1,28 @@
+name: "autoapprove"
+
+on:
+  pull_request_target:
+    types: [assigned, opened, synchronize, reopened]
+  workflow_run:
+    workflows: ["prbuild"]
+    types:
+      - completed
+
+permissions:
+  pull-requests: write
+  contents: write
+
+jobs:
+  autoapprove:
+    runs-on: ubuntu-latest
+    steps:
+      - name: approve
+        run: [ "curl -o tea https://dl.gitea.com/tea/main/tea-main-linux-amd64",
+               "chmod +x ./tea",
+               "./tea login add --name unistack --token ${{ secrets.GITHUB_TOKEN }} --url https://git.unistack.org",
+               "./tea pr --repo ${{ github.event.repository.name }}"
+        ]
+        if: github.actor == 'vtolstov'
+        id: approve
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}

.gitea/pkgdashcli.yaml

@@ -0,0 +1,3 @@
+branches:
+  - master
+  - v3

.gitea/workflows/autoupdate.yml

@@ -0,0 +1,24 @@
+on:
+  push:
+    branches:
+    - 'main'
+    - 'master'
+    - 'v3'
+  schedule:
+    #- cron: '* * * * *'
+    - cron: '@hourly'
+
+jobs:
+  autoupdate:
+    runs-on: ubuntu-latest
+    steps:
+    - name: setup-go
+      uses: https://gitea.com/actions/setup-go@v3
+      with:
+        go-version: 1.21
+    - name: checkout
+      uses: https://gitea.com/actions/checkout@v3
+    - name: get pkgdashcli
+      run: GOPROXY=direct GONOSUMDB="git.unistack.org/*" GONOPROXY="git.unistack.org/*" GOBIN=/bin go install git.unistack.org/unistack-org/pkgdash/cmd/pkgdashcli@latest
+    - name: pkgdashcli check
+      run: /bin/pkgdashcli check

.gitea/workflows/coverage.yml

@@ -0,0 +1,30 @@
+name: Go
+
+on:
+  push:
+    branches: [ master, v3 ]
+  pull_request:
+    branches: [ master, v3 ]
+  workflow_dispatch:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+    - name: checkout
+      uses: actions/checkout@v4
+
+    - name: setup
+      uses: actions/setup-go@v4
+      with:
+        go-version: stable
+
+    - name: coverage
+      run: go test -v -coverprofile coverage.out ./...
+
+    - name: badge
+      uses: ncruces/go-coverage-report@main
+      with:
+        coverage-file: coverage.out
+        reuse-go: true
+        amend: true

.gitea/workflows/lint.yml

@@ -0,0 +1,24 @@
+name: lint
+on:
+  pull_request:
+    branches:
+    - master
+    - v3
+jobs:
+  lint:
+    name: lint
+    runs-on: ubuntu-latest
+    steps:
+    - name: setup-go
+      uses: https://gitea.com/actions/setup-go@v3
+      with:
+        go-version: 1.21
+    - name: checkout
+      uses: https://gitea.com/actions/checkout@v3
+    - name: deps
+      run: go get -v -d ./...
+    - name: lint
+      uses: https://github.com/golangci/golangci-lint-action@v3.4.0
+      continue-on-error: true
+      with:
+        version: v1.52

.gitea/workflows/pr.yml

@@ -0,0 +1,23 @@
+name: pr
+on:
+  pull_request:
+    branches:
+    - master
+    - v3
+jobs:
+  test:
+    name: test
+    runs-on: ubuntu-latest
+    steps:
+    - name: checkout
+      uses: https://gitea.com/actions/checkout@v3
+    - name: setup-go
+      uses: https://gitea.com/actions/setup-go@v3
+      with:
+        go-version: 1.21
+    - name: deps
+      run: go get -v -t -d ./...
+    - name: test
+      env:
+        INTEGRATION_TESTS: yes
+      run: go test -v -mod readonly -race -coverprofile=coverage.txt -covermode=atomic ./...

.github.old/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,9 @@
+## Pull Request template
+Please, go through these steps before clicking submit on this PR.
+
+1. Give a descriptive title to your PR.
+2. Provide a description of your changes.
+3. Make sure you have some relevant tests.
+4. Put `closes #XXXX` in your comment to auto-close the issue that your PR fixes (if applicable).
+
+**PLEASE REMOVE THIS TEMPLATE BEFORE SUBMITTING**

.github.old/workflows/build.yml

@@ -34,7 +34,7 @@ jobs:
       - name: checkout
         uses: actions/checkout@v3
       - name: lint
-        uses: golangci/golangci-lint-action@v3.3.1
+        uses: golangci/golangci-lint-action@v3.4.0
         continue-on-error: true
         with:
           # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.

.github.old/workflows/dependabot-automerge.yml

@@ -15,7 +15,7 @@ jobs:
     steps:
       - name: metadata
         id: metadata
-        uses: dependabot/fetch-metadata@v1.3.5
+        uses: dependabot/fetch-metadata@v1.3.6
         with:
           github-token: "${{ secrets.TOKEN }}"
       - name: merge

.github.old/workflows/pr.yml

@@ -34,14 +34,7 @@ jobs:
       - name: checkout
         uses: actions/checkout@v3
       - name: lint
-        uses: golangci/golangci-lint-action@v3.3.1
+        uses: golangci/golangci-lint-action@v3.4.0
         continue-on-error: true
         with:
-          # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.
           version: v1.30
-          # Optional: working directory, useful for monorepos
-          # working-directory: somedir
-          # Optional: golangci-lint command line arguments.
-          # args: --issues-exit-code=0
-          # Optional: show only new issues if it's a pull request. The default value is `false`.
-          # only-new-issues: true

.gitignore

@@ -1,6 +1,8 @@
 # Develop tools
 /.vscode/
 /.idea/
+.idea
+.vscode
 
 # Binaries for programs and plugins
 *.exe
@@ -13,6 +15,7 @@
 _obj
 _test
 _build
+.DS_Store
 
 # Architecture specific extensions/prefixes
 *.[568vq]

.golangci.yml

@@ -1,6 +1,5 @@
 run:
   concurrency: 4
-  deadline: 5m
   issues-exit-code: 1
   tests: true
 
@@ -13,15 +12,13 @@ linters-settings:
 linters:
   enable:
     - govet
-    - deadcode
     - errcheck
     - govet
     - ineffassign
     - staticcheck
-    - structcheck
     - typecheck
     - unused
-    - varcheck
+    - spancheck
     - bodyclose
     - gci
     - goconst
@@ -41,4 +38,5 @@ linters:
     - prealloc
     - unconvert
     - unparam
+    - unused
   disable-all: false

README.md

@@ -1,4 +1,4 @@
-# Micro [![License](https://img.shields.io/:license-apache-blue.svg)](https://opensource.org/licenses/Apache-2.0) [![Doc](https://img.shields.io/badge/go.dev-reference-007d9c?logo=go&logoColor=white&style=flat-square)](https://pkg.go.dev/github.com/unistack-org/micro/v3?tab=overview) [![Status](https://github.com/unistack-org/micro/workflows/build/badge.svg?branch=master)](https://github.com/unistack-org/micro/actions?query=workflow%3Abuild+branch%3Amaster+event%3Apush) [![Lint](https://goreportcard.com/badge/go.unistack.org/micro/v3)](https://goreportcard.com/report/go.unistack.org/micro/v3) [![Coverage](https://codecov.io/gh/unistack-org/micro/branch/v3/graph/badge.svg?token=OZPO2LP7VS)](https://codecov.io/gh/unistack-org/micro)
+# Micro [![License](https://img.shields.io/:license-apache-blue.svg)](https://opensource.org/licenses/Apache-2.0) [![Doc](https://img.shields.io/badge/go.dev-reference-007d9c?logo=go&logoColor=white&style=flat-square)](https://pkg.go.dev/go.unistack.org/micro/v4?tab=overview) [![Status](https://github.com/unistack-org/micro/workflows/build/badge.svg?branch=master)](https://github.com/unistack-org/micro/actions?query=workflow%3Abuild+branch%3Amaster+event%3Apush) [![Lint](https://goreportcard.com/badge/go.unistack.org/micro/v4)](https://goreportcard.com/report/go.unistack.org/micro/v4) [![Coverage](https://codecov.io/gh/unistack-org/micro/branch/v4/graph/badge.svg?token=OZPO2LP7VS)](https://codecov.io/gh/unistack-org/micro)
 
 Micro is a standard library for microservices.
 

api/api.go

@@ -1,182 +0,0 @@
-package api // import "go.unistack.org/micro/v3/api"
-
-import (
-	"errors"
-	"regexp"
-	"strings"
-
-	"go.unistack.org/micro/v3/metadata"
-	"go.unistack.org/micro/v3/register"
-	"go.unistack.org/micro/v3/server"
-)
-
-// nolint: revive
-// Api interface
-type Api interface {
-	// Initialise options
-	Init(...Option) error
-	// Get the options
-	Options() Options
-	// Register a http handler
-	Register(*Endpoint) error
-	// Register a route
-	Deregister(*Endpoint) error
-	// Implementation of api
-	String() string
-}
-
-// Options holds the options
-type Options struct{}
-
-// Option func signature
-type Option func(*Options) error
-
-// Endpoint is a mapping between an RPC method and HTTP endpoint
-type Endpoint struct {
-	// Name Greeter.Hello
-	Name string
-	// Desciption for endpoint
-	Description string
-	// Handler e.g rpc, proxy
-	Handler string
-	// Body destination
-	// "*" or "" - top level message value
-	// "string" - inner message value
-	Body string
-	// Host e.g example.com
-	Host []string
-	// Method e.g GET, POST
-	Method []string
-	// Path e.g /greeter. Expect POSIX regex
-	Path []string
-	// Stream flag
-	Stream bool
-}
-
-// Service represents an API service
-type Service struct {
-	// Name of service
-	Name string
-	// Endpoint for this service
-	Endpoint *Endpoint
-	// Services that provides service
-	Services []*register.Service
-}
-
-// Encode encodes an endpoint to endpoint metadata
-func Encode(e *Endpoint) map[string]string {
-	if e == nil {
-		return nil
-	}
-
-	// endpoint map
-	ep := make(map[string]string)
-
-	// set vals only if they exist
-	set := func(k, v string) {
-		if len(v) == 0 {
-			return
-		}
-		ep[k] = v
-	}
-
-	set("endpoint", e.Name)
-	set("description", e.Description)
-	set("handler", e.Handler)
-	set("method", strings.Join(e.Method, ","))
-	set("path", strings.Join(e.Path, ","))
-	set("host", strings.Join(e.Host, ","))
-	set("body", e.Body)
-
-	return ep
-}
-
-// Decode decodes endpoint metadata into an endpoint
-func Decode(e metadata.Metadata) *Endpoint {
-	if e == nil {
-		return nil
-	}
-
-	ep := &Endpoint{}
-	ep.Name, _ = e.Get("endpoint")
-	ep.Description, _ = e.Get("description")
-	epmethod, _ := e.Get("method")
-	ep.Method = []string{epmethod}
-	eppath, _ := e.Get("path")
-	ep.Path = []string{eppath}
-	ephost, _ := e.Get("host")
-	ep.Host = []string{ephost}
-	ep.Handler, _ = e.Get("handler")
-	ep.Body, _ = e.Get("body")
-
-	return ep
-}
-
-// Validate validates an endpoint to guarantee it won't blow up when being served
-func Validate(e *Endpoint) error {
-	if e == nil {
-		return errors.New("endpoint is nil")
-	}
-
-	if len(e.Name) == 0 {
-		return errors.New("name required")
-	}
-
-	for _, p := range e.Path {
-		ps := p[0]
-		pe := p[len(p)-1]
-
-		switch {
-		case ps == '^' && pe == '$':
-			if _, err := regexp.CompilePOSIX(p); err != nil {
-				return err
-			}
-		case ps == '^' && pe != '$':
-			return errors.New("invalid path")
-		case ps != '^' && pe == '$':
-			return errors.New("invalid path")
-		}
-	}
-
-	if len(e.Handler) == 0 {
-		return errors.New("invalid handler")
-	}
-
-	return nil
-}
-
-/*
-Design ideas
-
-// Gateway is an api gateway interface
-type Gateway interface {
-	// Register a http handler
-	Handle(pattern string, http.Handler)
-	// Register a route
-	RegisterRoute(r Route)
-	// Init initialises the command line.
-	// It also parses further options.
-	Init(...Option) error
-	// Run the gateway
-	Run() error
-}
-
-// NewGateway returns a new api gateway
-func NewGateway() Gateway {
-	return newGateway()
-}
-*/
-
-// WithEndpoint returns a server.HandlerOption with endpoint metadata set
-//
-// Usage:
-//
-// 	proto.RegisterHandler(service.Server(), new(Handler), api.WithEndpoint(
-//		&api.Endpoint{
-//			Name: "Greeter.Hello",
-//			Path: []string{"/greeter"},
-//		},
-//	))
-func WithEndpoint(e *Endpoint) server.HandlerOption {
-	return server.EndpointMetadata(e.Name, Encode(e))
-}

api/api_test.go

@@ -1,245 +0,0 @@
-package api
-
-import (
-	"strings"
-	"testing"
-
-	"go.unistack.org/micro/v3/metadata"
-	"go.unistack.org/micro/v3/server"
-)
-
-func TestDecode(t *testing.T) {
-	md := metadata.New(0)
-	md.Set("host", "localhost", "method", "GET", "path", "/")
-	ep := Decode(md)
-	if md == nil {
-		t.Fatalf("failed to decode md %#+v", md)
-	} else if len(ep.Host) != 1 || len(ep.Method) != 1 || len(ep.Path) != 1 {
-		t.Fatalf("ep invalid after decode %#+v", ep)
-	}
-	if ep.Host[0] != "localhost" || ep.Method[0] != "GET" || ep.Path[0] != "/" {
-		t.Fatalf("ep invalid after decode %#+v", ep)
-	}
-}
-
-//nolint:gocyclo
-func TestEncode(t *testing.T) {
-	testData := []*Endpoint{
-		nil,
-		{
-			Name:        "Foo.Bar",
-			Description: "A test endpoint",
-			Handler:     "meta",
-			Host:        []string{"foo.com"},
-			Method:      []string{"GET"},
-			Path:        []string{"/test"},
-		},
-	}
-
-	compare := func(expect, got []string) bool {
-		// no data to compare, return true
-		if len(expect) == 0 && len(got) == 0 {
-			return true
-		}
-		// no data expected but got some return false
-		if len(expect) == 0 && len(got) > 0 {
-			return false
-		}
-
-		// compare expected with what we got
-		for _, e := range expect {
-			var seen bool
-			for _, g := range got {
-				if e == g {
-					seen = true
-					break
-				}
-			}
-			if !seen {
-				return false
-			}
-		}
-
-		// we're done, return true
-		return true
-	}
-
-	for _, d := range testData {
-		// encode
-		e := Encode(d)
-		// decode
-		de := Decode(e)
-
-		// nil endpoint returns nil
-		if d == nil {
-			if e != nil {
-				t.Fatalf("expected nil got %v", e)
-			}
-			if de != nil {
-				t.Fatalf("expected nil got %v", de)
-			}
-
-			continue
-		}
-
-		// check encoded map
-		name := e["endpoint"]
-		desc := e["description"]
-		method := strings.Split(e["method"], ",")
-		path := strings.Split(e["path"], ",")
-		host := strings.Split(e["host"], ",")
-		handler := e["handler"]
-
-		if name != d.Name {
-			t.Fatalf("expected %v got %v", d.Name, name)
-		}
-		if desc != d.Description {
-			t.Fatalf("expected %v got %v", d.Description, desc)
-		}
-		if handler != d.Handler {
-			t.Fatalf("expected %v got %v", d.Handler, handler)
-		}
-		if ok := compare(d.Method, method); !ok {
-			t.Fatalf("expected %v got %v", d.Method, method)
-		}
-		if ok := compare(d.Path, path); !ok {
-			t.Fatalf("expected %v got %v", d.Path, path)
-		}
-		if ok := compare(d.Host, host); !ok {
-			t.Fatalf("expected %v got %v", d.Host, host)
-		}
-
-		if de.Name != d.Name {
-			t.Fatalf("expected %v got %v", d.Name, de.Name)
-		}
-		if de.Description != d.Description {
-			t.Fatalf("expected %v got %v", d.Description, de.Description)
-		}
-		if de.Handler != d.Handler {
-			t.Fatalf("expected %v got %v", d.Handler, de.Handler)
-		}
-		if ok := compare(d.Method, de.Method); !ok {
-			t.Fatalf("expected %v got %v", d.Method, de.Method)
-		}
-		if ok := compare(d.Path, de.Path); !ok {
-			t.Fatalf("expected %v got %v", d.Path, de.Path)
-		}
-		if ok := compare(d.Host, de.Host); !ok {
-			t.Fatalf("expected %v got %v", d.Host, de.Host)
-		}
-	}
-}
-
-func TestValidate(t *testing.T) {
-	epPcre := &Endpoint{
-		Name:        "Foo.Bar",
-		Description: "A test endpoint",
-		Handler:     "meta",
-		Host:        []string{"foo.com"},
-		Method:      []string{"GET"},
-		Path:        []string{"^/test/?$"},
-	}
-	if err := Validate(epPcre); err != nil {
-		t.Fatal(err)
-	}
-
-	epGpath := &Endpoint{
-		Name:        "Foo.Bar",
-		Description: "A test endpoint",
-		Handler:     "meta",
-		Host:        []string{"foo.com"},
-		Method:      []string{"GET"},
-		Path:        []string{"/test/{id}"},
-	}
-	if err := Validate(epGpath); err != nil {
-		t.Fatal(err)
-	}
-
-	epPcreInvalid := &Endpoint{
-		Name:        "Foo.Bar",
-		Description: "A test endpoint",
-		Handler:     "meta",
-		Host:        []string{"foo.com"},
-		Method:      []string{"GET"},
-		Path:        []string{"/test/?$"},
-	}
-	if err := Validate(epPcreInvalid); err == nil {
-		t.Fatalf("invalid pcre %v", epPcreInvalid.Path[0])
-	}
-}
-
-func TestWithEndpoint(t *testing.T) {
-	ep := &Endpoint{
-		Name:        "Foo.Bar",
-		Description: "A test endpoint",
-		Handler:     "meta",
-		Host:        []string{"foo.com"},
-		Method:      []string{"GET"},
-		Path:        []string{"/test/{id}"},
-	}
-	o := WithEndpoint(ep)
-	opts := server.NewHandlerOptions(o)
-	if opts.Metadata == nil {
-		t.Fatalf("WithEndpoint not works %#+v", opts)
-	}
-	md, ok := opts.Metadata[ep.Name]
-	if !ok {
-		t.Fatalf("WithEndpoint not works %#+v", opts)
-	}
-	if v, ok := md.Get("Endpoint"); !ok || v != "Foo.Bar" {
-		t.Fatalf("WithEndpoint not works %#+v", md)
-	}
-}
-
-func TestValidateNilErr(t *testing.T) {
-	var ep *Endpoint
-	if err := Validate(ep); err == nil {
-		t.Fatalf("Validate not works")
-	}
-}
-
-func TestValidateMissingNameErr(t *testing.T) {
-	ep := &Endpoint{}
-	if err := Validate(ep); err == nil {
-		t.Fatalf("Validate not works")
-	}
-}
-
-func TestValidateMissingHandlerErr(t *testing.T) {
-	ep := &Endpoint{Name: "test"}
-	if err := Validate(ep); err == nil {
-		t.Fatalf("Validate not works")
-	}
-}
-
-func TestValidateRegexpStartErr(t *testing.T) {
-	ep := &Endpoint{Name: "test", Handler: "test"}
-	ep.Path = []string{"^/"}
-	if err := Validate(ep); err == nil {
-		t.Fatalf("Validate not works")
-	}
-}
-
-func TestValidateRegexpEndErr(t *testing.T) {
-	ep := &Endpoint{Name: "test", Handler: "test", Path: []string{""}}
-	ep.Path[0] = "/$"
-	if err := Validate(ep); err == nil {
-		t.Fatalf("Validate not works")
-	}
-}
-
-func TestValidateRegexpNonErr(t *testing.T) {
-	ep := &Endpoint{Name: "test", Handler: "test", Path: []string{""}}
-	ep.Path[0] = "^/(.*)$"
-	if err := Validate(ep); err != nil {
-		t.Fatalf("Validate not works")
-	}
-}
-
-func TestValidateRegexpErr(t *testing.T) {
-	ep := &Endpoint{Name: "test", Handler: "test", Path: []string{""}}
-	ep.Path[0] = "^/(.$"
-	if err := Validate(ep); err == nil {
-		t.Fatalf("Validate not works")
-	}
-}

broker/broker.go

@@ -1,21 +1,27 @@
 // Package broker is an interface used for asynchronous messaging
-package broker // import "go.unistack.org/micro/v3/broker"
+package broker // import "go.unistack.org/micro/v4/broker"
 
 import (
 	"context"
 	"errors"
+	"time"
 
-	"go.unistack.org/micro/v3/metadata"
+	"go.unistack.org/micro/v4/metadata"
+	"go.unistack.org/micro/v4/options"
 )
 
 // DefaultBroker default memory broker
-var DefaultBroker = NewBroker()
+var DefaultBroker Broker = NewBroker()
 
 var (
 	// ErrNotConnected returns when broker used but not connected yet
 	ErrNotConnected = errors.New("broker not connected")
 	// ErrDisconnected returns when broker disconnected
 	ErrDisconnected = errors.New("broker disconnected")
+	// ErrInvalidMessage returns when message has nvalid format
+	ErrInvalidMessage = errors.New("broker message has invalid format")
+	// DefaultGracefulTimeout
+	DefaultGracefulTimeout = 5 * time.Second
 )
 
 // Broker is an interface used for asynchronous messaging.
@@ -23,7 +29,7 @@ type Broker interface {
 	// Name returns broker instance name
 	Name() string
 	// Init initilize broker
-	Init(opts ...Option) error
+	Init(opts ...options.Option) error
 	// Options returns broker options
 	Options() Options
 	// Address return configured address
@@ -32,93 +38,29 @@ type Broker interface {
 	Connect(ctx context.Context) error
 	// Disconnect disconnect from broker
 	Disconnect(ctx context.Context) error
-	// Publish message to broker topic
-	Publish(ctx context.Context, topic string, msg *Message, opts ...PublishOption) error
+	// Publish message, msg can be single broker.Message or []broker.Message
+	Publish(ctx context.Context, msg interface{}, opts ...options.Option) error
 	// Subscribe subscribes to topic message via handler
-	Subscribe(ctx context.Context, topic string, h Handler, opts ...SubscribeOption) (Subscriber, error)
-	// BatchPublish messages to broker with multiple topics
-	BatchPublish(ctx context.Context, msgs []*Message, opts ...PublishOption) error
-	// BatchSubscribe subscribes to topic messages via handler
-	BatchSubscribe(ctx context.Context, topic string, h BatchHandler, opts ...SubscribeOption) (Subscriber, error)
+	Subscribe(ctx context.Context, topic string, handler interface{}, opts ...options.Option) (Subscriber, error)
 	// String type of broker
 	String() string
 }
 
-// Handler is used to process messages via a subscription of a topic.
-type Handler func(Event) error
-
-// Events contains multiple events
-type Events []Event
-
-// Ack try to ack all events and return
-func (evs Events) Ack() error {
-	var err error
-	for _, ev := range evs {
-		if err = ev.Ack(); err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
-// SetError sets error on event
-func (evs Events) SetError(err error) {
-	for _, ev := range evs {
-		ev.SetError(err)
-	}
-}
-
-// BatchHandler is used to process messages in batches via a subscription of a topic.
-type BatchHandler func(Events) error
-
-// Event is given to a subscription handler for processing
-type Event interface {
-	// Topic returns event topic
+// Message is given to a subscription handler for processing
+type Message interface {
+	// Context for the message
+	Context() context.Context
+	// Topic
 	Topic() string
-	// Message returns broker message
-	Message() *Message
+	// Header returns message headers
+	Header() metadata.Metadata
+	// Body returns broker message may be []byte slice or some go struct
+	Body() interface{}
 	// Ack acknowledge message
 	Ack() error
 	// Error returns message error (like decoding errors or some other)
+	// In this case Body contains raw []byte from broker
 	Error() error
-	// SetError set event processing error
-	SetError(err error)
-}
-
-// RawMessage is a raw encoded JSON value.
-// It implements Marshaler and Unmarshaler and can be used to delay decoding or precompute a encoding.
-type RawMessage []byte
-
-// MarshalJSON returns m as the JSON encoding of m.
-func (m *RawMessage) MarshalJSON() ([]byte, error) {
-	if m == nil {
-		return []byte("null"), nil
-	}
-	return *m, nil
-}
-
-// UnmarshalJSON sets *m to a copy of data.
-func (m *RawMessage) UnmarshalJSON(data []byte) error {
-	if m == nil {
-		return errors.New("RawMessage UnmarshalJSON on nil pointer")
-	}
-	*m = append((*m)[0:0], data...)
-	return nil
-}
-
-// Message is used to transfer data
-type Message struct {
-	// Header contains message metadata
-	Header metadata.Metadata
-	// Body contains message body
-	Body RawMessage
-}
-
-// NewMessage create broker message with topic filled
-func NewMessage(topic string) *Message {
-	m := &Message{Header: metadata.New(2)}
-	m.Header.Set(metadata.HeaderTopic, topic)
-	return m
 }
 
 // Subscriber is a convenience return type for the Subscribe method
@@ -130,3 +72,9 @@ type Subscriber interface {
 	// Unsubscribe from topic
 	Unsubscribe(ctx context.Context) error
 }
+
+// MessageHandler func signature for single message processing
+type MessageHandler func(Message) error
+
+// MessagesHandler func signature for batch message processing
+type MessagesHandler func([]Message) error

broker/context.go

@@ -22,33 +22,3 @@ func NewContext(ctx context.Context, s Broker) context.Context {
 	}
 	return context.WithValue(ctx, brokerKey{}, s)
 }
-
-// SetSubscribeOption returns a function to setup a context with given value
-func SetSubscribeOption(k, v interface{}) SubscribeOption {
-	return func(o *SubscribeOptions) {
-		if o.Context == nil {
-			o.Context = context.Background()
-		}
-		o.Context = context.WithValue(o.Context, k, v)
-	}
-}
-
-// SetOption returns a function to setup a context with given value
-func SetOption(k, v interface{}) Option {
-	return func(o *Options) {
-		if o.Context == nil {
-			o.Context = context.Background()
-		}
-		o.Context = context.WithValue(o.Context, k, v)
-	}
-}
-
-// SetPublishOption returns a function to setup a context with given value
-func SetPublishOption(k, v interface{}) PublishOption {
-	return func(o *PublishOptions) {
-		if o.Context == nil {
-			o.Context = context.Background()
-		}
-		o.Context = context.WithValue(o.Context, k, v)
-	}
-}

broker/context_test.go

@@ -37,36 +37,3 @@ func TestNewNilContext(t *testing.T) {
 		t.Fatal("NewContext not works")
 	}
 }
-
-func TestSetSubscribeOption(t *testing.T) {
-	type key struct{}
-	o := SetSubscribeOption(key{}, "test")
-	opts := &SubscribeOptions{}
-	o(opts)
-
-	if v, ok := opts.Context.Value(key{}).(string); !ok || v == "" {
-		t.Fatal("SetSubscribeOption not works")
-	}
-}
-
-func TestSetPublishOption(t *testing.T) {
-	type key struct{}
-	o := SetPublishOption(key{}, "test")
-	opts := &PublishOptions{}
-	o(opts)
-
-	if v, ok := opts.Context.Value(key{}).(string); !ok || v == "" {
-		t.Fatal("SetPublishOption not works")
-	}
-}
-
-func TestSetOption(t *testing.T) {
-	type key struct{}
-	o := SetOption(key{}, "test")
-	opts := &Options{}
-	o(opts)
-
-	if v, ok := opts.Context.Value(key{}).(string); !ok || v == "" {
-		t.Fatal("SetOption not works")
-	}
-}

broker/memory.go

@@ -2,17 +2,22 @@ package broker
 
 import (
 	"context"
+	"fmt"
 	"sync"
+	"time"
 
-	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v3/metadata"
-	maddr "go.unistack.org/micro/v3/util/addr"
-	"go.unistack.org/micro/v3/util/id"
-	mnet "go.unistack.org/micro/v3/util/net"
-	"go.unistack.org/micro/v3/util/rand"
+	"go.unistack.org/micro/v4/codec"
+	"go.unistack.org/micro/v4/logger"
+	"go.unistack.org/micro/v4/metadata"
+	"go.unistack.org/micro/v4/options"
+	"go.unistack.org/micro/v4/semconv"
+	maddr "go.unistack.org/micro/v4/util/addr"
+	"go.unistack.org/micro/v4/util/id"
+	mnet "go.unistack.org/micro/v4/util/net"
+	"go.unistack.org/micro/v4/util/rand"
 )
 
-type memoryBroker struct {
+type MemoryBroker struct {
 	subscribers map[string][]*memorySubscriber
 	addr        string
 	opts        Options
@@ -20,32 +25,15 @@ type memoryBroker struct {
 	connected bool
 }
 
-type memoryEvent struct {
-	err     error
-	message interface{}
-	topic   string
-	opts    Options
-}
-
-type memorySubscriber struct {
-	ctx          context.Context
-	exit         chan bool
-	handler      Handler
-	batchhandler BatchHandler
-	id           string
-	topic        string
-	opts         SubscribeOptions
-}
-
-func (m *memoryBroker) Options() Options {
+func (m *MemoryBroker) Options() Options {
 	return m.opts
 }
 
-func (m *memoryBroker) Address() string {
+func (m *MemoryBroker) Address() string {
 	return m.addr
 }
 
-func (m *memoryBroker) Connect(ctx context.Context) error {
+func (m *MemoryBroker) Connect(ctx context.Context) error {
 	m.Lock()
 	defer m.Unlock()
 
@@ -69,35 +57,33 @@ func (m *memoryBroker) Connect(ctx context.Context) error {
 	return nil
 }
 
-func (m *memoryBroker) Disconnect(ctx context.Context) error {
+func (m *MemoryBroker) Disconnect(ctx context.Context) error {
 	m.Lock()
 	defer m.Unlock()
 
-	if !m.connected {
-		return nil
-	}
-
+	select {
+	case <-ctx.Done():
+		return ctx.Err()
+	default:
+		if m.connected {
 			m.connected = false
+		}
+	}
+
 	return nil
 }
 
-func (m *memoryBroker) Init(opts ...Option) error {
+func (m *MemoryBroker) Init(opts ...options.Option) error {
+	var err error
 	for _, o := range opts {
-		o(&m.opts)
+		if err = o(&m.opts); err != nil {
+			return err
+		}
 	}
 	return nil
 }
 
-func (m *memoryBroker) Publish(ctx context.Context, topic string, msg *Message, opts ...PublishOption) error {
-	msg.Header.Set(metadata.HeaderTopic, topic)
-	return m.publish(ctx, []*Message{msg}, opts...)
-}
-
-func (m *memoryBroker) BatchPublish(ctx context.Context, msgs []*Message, opts ...PublishOption) error {
-	return m.publish(ctx, msgs, opts...)
-}
-
-func (m *memoryBroker) publish(ctx context.Context, msgs []*Message, opts ...PublishOption) error {
+func (m *MemoryBroker) Publish(ctx context.Context, message interface{}, opts ...options.Option) error {
 	m.RLock()
 	if !m.connected {
 		m.RUnlock()
@@ -112,17 +98,29 @@ func (m *memoryBroker) publish(ctx context.Context, msgs []*Message, opts ...Pub
 		return ctx.Err()
 	default:
 		options := NewPublishOptions(opts...)
-
-		msgTopicMap := make(map[string]Events)
-		for _, v := range msgs {
-			p := &memoryEvent{opts: m.opts}
-
-			if m.opts.Codec == nil || options.BodyOnly {
-				p.topic, _ = v.Header.Get(metadata.HeaderTopic)
-				p.message = v.Body
+		var msgs []Message
+		switch v := message.(type) {
+		case []Message:
+			msgs = v
+		case Message:
+			msgs = append(msgs, v)
+		default:
+			return ErrInvalidMessage
+		}
+		msgTopicMap := make(map[string][]*memoryMessage)
+		for _, msg := range msgs {
+			p := &memoryMessage{opts: options}
+			p.topic, _ = msg.Header().Get(metadata.HeaderTopic)
+			if v, ok := msg.Body().(*codec.Frame); ok {
+				p.body = msg.Body()
+			} else if len(m.opts.Codecs) == 0 {
+				p.body = msg.Body()
 			} else {
-				p.topic, _ = v.Header.Get(metadata.HeaderTopic)
-				p.message, err = m.opts.Codec.Marshal(v)
+				cf, ok := m.opts.Codecs[options.ContentType]
+				if !ok {
+					return fmt.Errorf("%s: %s", codec.ErrUnknownContentType, options.ContentType)
+				}
+				p.body, err = cf.Marshal(v)
 				if err != nil {
 					return err
 				}
@@ -130,110 +128,96 @@ func (m *memoryBroker) publish(ctx context.Context, msgs []*Message, opts ...Pub
 			msgTopicMap[p.topic] = append(msgTopicMap[p.topic], p)
 		}
 
-		beh := m.opts.BatchErrorHandler
 		eh := m.opts.ErrorHandler
 
 		for t, ms := range msgTopicMap {
+			ts := time.Now()
+
+			m.opts.Meter.Counter(semconv.PublishMessageInflight, "endpoint", t).Add(len(ms))
+			m.opts.Meter.Counter(semconv.SubscribeMessageInflight, "endpoint", t).Add(len(ms))
+
 			m.RLock()
 			subs, ok := m.subscribers[t]
 			m.RUnlock()
 			if !ok {
+				m.opts.Meter.Counter(semconv.PublishMessageTotal, "endpoint", t, "status", "failure").Add(len(ms))
+				m.opts.Meter.Counter(semconv.PublishMessageInflight, "endpoint", t).Add(-len(ms))
+				m.opts.Meter.Counter(semconv.SubscribeMessageInflight, "endpoint", t).Add(-len(ms))
 				continue
 			}
 
+			m.opts.Meter.Counter(semconv.PublishMessageTotal, "endpoint", t, "status", "success").Add(len(ms))
 			for _, sub := range subs {
-				if sub.opts.BatchErrorHandler != nil {
-					beh = sub.opts.BatchErrorHandler
-				}
 				if sub.opts.ErrorHandler != nil {
 					eh = sub.opts.ErrorHandler
 				}
 
-				switch {
-				// batch processing
-				case sub.batchhandler != nil:
-					if err = sub.batchhandler(ms); err != nil {
-						ms.SetError(err)
-						if beh != nil {
-							_ = beh(ms)
-						} else if m.opts.Logger.V(logger.ErrorLevel) {
-							m.opts.Logger.Error(m.opts.Context, err.Error())
+				switch mh := sub.handler.(type) {
+				case MessagesHandler:
+					mhs := make([]Message, 0, len(ms))
+					for _, m := range ms {
+						mhs = append(mhs, m)
 					}
-					} else if sub.opts.AutoAck {
-						if err = ms.Ack(); err != nil {
-							m.opts.Logger.Errorf(m.opts.Context, "ack failed: %v", err)
-						}
-					}
-					// single processing
-				case sub.handler != nil:
-					for _, p := range ms {
-						if err = sub.handler(p); err != nil {
-							p.SetError(err)
+					if err = mh(mhs); err != nil {
+						m.opts.Meter.Counter(semconv.SubscribeMessageTotal, "endpoint", t, "status", "failure").Add(len(ms))
 						if eh != nil {
-								_ = eh(p)
+							switch meh := eh.(type) {
+							case MessagesHandler:
+								_ = meh(mhs)
+							case MessageHandler:
+								for _, me := range mhs {
+									_ = meh(me)
+								}
+							}
 						} else if m.opts.Logger.V(logger.ErrorLevel) {
 							m.opts.Logger.Error(m.opts.Context, err.Error())
 						}
-						} else if sub.opts.AutoAck {
+					}
+				case MessageHandler:
+					for _, p := range ms {
+						if err = mh(p); err != nil {
+							m.opts.Meter.Counter(semconv.SubscribeMessageTotal, "endpoint", t, "status", "failure").Inc()
+							if eh != nil {
+								switch meh := eh.(type) {
+								case MessageHandler:
+									_ = meh(p)
+								case MessagesHandler:
+									_ = meh([]Message{p})
+								}
+							} else if m.opts.Logger.V(logger.ErrorLevel) {
+								m.opts.Logger.Error(m.opts.Context, err.Error())
+							}
+						} else {
+							if sub.opts.AutoAck {
 								if err = p.Ack(); err != nil {
-								m.opts.Logger.Errorf(m.opts.Context, "ack failed: %v", err)
-							}
-						}
+									m.opts.Logger.Error(m.opts.Context, "ack failed: "+err.Error())
+									m.opts.Meter.Counter(semconv.SubscribeMessageTotal, "endpoint", t, "status", "failure").Inc()
+								} else {
+									m.opts.Meter.Counter(semconv.SubscribeMessageTotal, "endpoint", t, "status", "success").Inc()
+								}
+							} else {
+								m.opts.Meter.Counter(semconv.SubscribeMessageTotal, "endpoint", t, "status", "success").Inc()
+							}
+						}
+						m.opts.Meter.Counter(semconv.PublishMessageInflight, "endpoint", t).Add(-1)
+						m.opts.Meter.Counter(semconv.SubscribeMessageInflight, "endpoint", t).Add(-1)
 					}
 				}
 			}
+
+			te := time.Since(ts)
+			m.opts.Meter.Summary(semconv.PublishMessageLatencyMicroseconds, "endpoint", t).Update(te.Seconds())
+			m.opts.Meter.Histogram(semconv.PublishMessageDurationSeconds, "endpoint", t).Update(te.Seconds())
+			m.opts.Meter.Summary(semconv.SubscribeMessageLatencyMicroseconds, "endpoint", t).Update(te.Seconds())
+			m.opts.Meter.Histogram(semconv.SubscribeMessageDurationSeconds, "endpoint", t).Update(te.Seconds())
 		}
+
 	}
 
 	return nil
 }
 
-func (m *memoryBroker) BatchSubscribe(ctx context.Context, topic string, handler BatchHandler, opts ...SubscribeOption) (Subscriber, error) {
-	m.RLock()
-	if !m.connected {
-		m.RUnlock()
-		return nil, ErrNotConnected
-	}
-	m.RUnlock()
-
-	sid, err := id.New()
-	if err != nil {
-		return nil, err
-	}
-
-	options := NewSubscribeOptions(opts...)
-
-	sub := &memorySubscriber{
-		exit:         make(chan bool, 1),
-		id:           sid,
-		topic:        topic,
-		batchhandler: handler,
-		opts:         options,
-		ctx:          ctx,
-	}
-
-	m.Lock()
-	m.subscribers[topic] = append(m.subscribers[topic], sub)
-	m.Unlock()
-
-	go func() {
-		<-sub.exit
-		m.Lock()
-		newSubscribers := make([]*memorySubscriber, 0, len(m.subscribers)-1)
-		for _, sb := range m.subscribers[topic] {
-			if sb.id == sub.id {
-				continue
-			}
-			newSubscribers = append(newSubscribers, sb)
-		}
-		m.subscribers[topic] = newSubscribers
-		m.Unlock()
-	}()
-
-	return sub, nil
-}
-
-func (m *memoryBroker) Subscribe(ctx context.Context, topic string, handler Handler, opts ...SubscribeOption) (Subscriber, error) {
+func (m *MemoryBroker) Subscribe(ctx context.Context, topic string, handler interface{}, opts ...options.Option) (Subscriber, error) {
 	m.RLock()
 	if !m.connected {
 		m.RUnlock()
@@ -278,46 +262,54 @@ func (m *memoryBroker) Subscribe(ctx context.Context, topic string, handler Hand
 	return sub, nil
 }
 
-func (m *memoryBroker) String() string {
+func (m *MemoryBroker) String() string {
 	return "memory"
 }
 
-func (m *memoryBroker) Name() string {
+func (m *MemoryBroker) Name() string {
 	return m.opts.Name
 }
 
-func (m *memoryEvent) Topic() string {
+type memoryMessage struct {
+	err    error
+	body   interface{}
+	topic  string
+	header metadata.Metadata
+	opts   PublishOptions
+	ctx    context.Context
+}
+
+func (m *memoryMessage) Topic() string {
 	return m.topic
 }
 
-func (m *memoryEvent) Message() *Message {
-	switch v := m.message.(type) {
-	case *Message:
-		return v
-	case []byte:
-		msg := &Message{}
-		if err := m.opts.Codec.Unmarshal(v, msg); err != nil {
-			if m.opts.Logger.V(logger.ErrorLevel) {
-				m.opts.Logger.Error(m.opts.Context, "[memory]: failed to unmarshal: %v", err)
-			}
-			return nil
-		}
-		return msg
-	}
+func (m *memoryMessage) Header() metadata.Metadata {
+	return m.header
+}
 
+func (m *memoryMessage) Body() interface{} {
+	return m.body
+}
+
+func (m *memoryMessage) Ack() error {
 	return nil
 }
 
-func (m *memoryEvent) Ack() error {
-	return nil
-}
-
-func (m *memoryEvent) Error() error {
+func (m *memoryMessage) Error() error {
 	return m.err
 }
 
-func (m *memoryEvent) SetError(err error) {
-	m.err = err
+func (m *memoryMessage) Context() context.Context {
+	return m.ctx
+}
+
+type memorySubscriber struct {
+	ctx     context.Context
+	exit    chan bool
+	handler interface{}
+	id      string
+	topic   string
+	opts    SubscribeOptions
 }
 
 func (m *memorySubscriber) Options() SubscribeOptions {
@@ -334,8 +326,8 @@ func (m *memorySubscriber) Unsubscribe(ctx context.Context) error {
 }
 
 // NewBroker return new memory broker
-func NewBroker(opts ...Option) Broker {
-	return &memoryBroker{
+func NewBroker(opts ...options.Option) *MemoryBroker {
+	return &MemoryBroker{
 		opts:        NewOptions(opts...),
 		subscribers: make(map[string][]*memorySubscriber),
 	}

broker/memory_test.go

@@ -5,7 +5,7 @@ import (
 	"fmt"
 	"testing"
 
-	"go.unistack.org/micro/v3/metadata"
+	"go.unistack.org/micro/v4/metadata"
 )
 
 func TestMemoryBatchBroker(t *testing.T) {
@@ -19,29 +19,35 @@ func TestMemoryBatchBroker(t *testing.T) {
 	topic := "test"
 	count := 10
 
-	fn := func(evts Events) error {
-		return evts.Ack()
+	fn := func(evts []Message) error {
+		var err error
+		for _, evt := range evts {
+			if err = evt.Ack(); err != nil {
+				return err
+			}
+		}
+		return nil
 	}
 
-	sub, err := b.BatchSubscribe(ctx, topic, fn)
+	sub, err := b.Subscribe(ctx, topic, fn)
 	if err != nil {
 		t.Fatalf("Unexpected error subscribing %v", err)
 	}
 
-	msgs := make([]*Message, 0, count)
+	msgs := make([]Message, 0, count)
 	for i := 0; i < count; i++ {
-		message := &Message{
-			Header: map[string]string{
-				metadata.HeaderTopic: topic,
-				"foo":                "bar",
-				"id":                 fmt.Sprintf("%d", i),
+		message := &memoryMessage{
+			header: metadata.Metadata{
+				metadata.HeaderTopic: []string{topic},
+				"foo":                []string{"bar"},
+				"id":                 []string{fmt.Sprintf("%d", i)},
 			},
-			Body: []byte(`"hello world"`),
+			body: []byte(`"hello world"`),
 		}
 		msgs = append(msgs, message)
 	}
 
-	if err := b.BatchPublish(ctx, msgs); err != nil {
+	if err := b.Publish(ctx, msgs); err != nil {
 		t.Fatalf("Unexpected error publishing %v", err)
 	}
 
@@ -65,8 +71,8 @@ func TestMemoryBroker(t *testing.T) {
 	topic := "test"
 	count := 10
 
-	fn := func(p Event) error {
-		return nil
+	fn := func(p Message) error {
+		return p.Ack()
 	}
 
 	sub, err := b.Subscribe(ctx, topic, fn)
@@ -74,24 +80,20 @@ func TestMemoryBroker(t *testing.T) {
 		t.Fatalf("Unexpected error subscribing %v", err)
 	}
 
-	msgs := make([]*Message, 0, count)
+	msgs := make([]Message, 0, count)
 	for i := 0; i < count; i++ {
-		message := &Message{
-			Header: map[string]string{
-				metadata.HeaderTopic: topic,
-				"foo":                "bar",
-				"id":                 fmt.Sprintf("%d", i),
+		message := &memoryMessage{
+			header: metadata.Metadata{
+				metadata.HeaderTopic: []string{topic},
+				"foo":                []string{"bar"},
+				"id":                 []string{fmt.Sprintf("%d", i)},
 			},
-			Body: []byte(`"hello world"`),
+			body: []byte(`"hello world"`),
 		}
 		msgs = append(msgs, message)
-
-		if err := b.Publish(ctx, topic, message); err != nil {
-			t.Fatalf("Unexpected error publishing %d err: %v", i, err)
-		}
 	}
 
-	if err := b.BatchPublish(ctx, msgs); err != nil {
+	if err := b.Publish(ctx, msgs); err != nil {
 		t.Fatalf("Unexpected error publishing %v", err)
 	}
 

broker/options.go

@@ -5,11 +5,14 @@ import (
 	"crypto/tls"
 	"time"
 
-	"go.unistack.org/micro/v3/codec"
-	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v3/meter"
-	"go.unistack.org/micro/v3/register"
-	"go.unistack.org/micro/v3/tracer"
+	"go.unistack.org/micro/v4/codec"
+	"go.unistack.org/micro/v4/logger"
+	"go.unistack.org/micro/v4/metadata"
+	"go.unistack.org/micro/v4/meter"
+	"go.unistack.org/micro/v4/options"
+	"go.unistack.org/micro/v4/register"
+	"go.unistack.org/micro/v4/sync"
+	"go.unistack.org/micro/v4/tracer"
 )
 
 // Options struct
@@ -18,8 +21,8 @@ type Options struct {
 	Tracer tracer.Tracer
 	// Register can be used for clustering
 	Register register.Register
-	// Codec holds the codec for marshal/unmarshal
-	Codec codec.Codec
+	// Codecs holds the codec for marshal/unmarshal
+	Codecs map[string]codec.Codec
 	// Logger used for logging
 	Logger logger.Logger
 	// Meter used for metrics
@@ -28,49 +31,51 @@ type Options struct {
 	Context context.Context
 	// TLSConfig holds tls.TLSConfig options
 	TLSConfig *tls.Config
-	// ErrorHandler used when broker can't unmarshal incoming message
-	ErrorHandler Handler
-	// BatchErrorHandler used when broker can't unmashal incoming messages
-	BatchErrorHandler BatchHandler
+	// ErrorHandler used when broker have error while processing message
+	ErrorHandler interface{}
 	// Name holds the broker name
 	Name string
-	// Addrs holds the broker address
-	Addrs []string
+	// Address holds the broker address
+	Address []string
+
+	Wait *sync.WaitGroup
+
+	GracefulTimeout time.Duration
 }
 
 // NewOptions create new Options
-func NewOptions(opts ...Option) Options {
-	options := Options{
+func NewOptions(opts ...options.Option) Options {
+	newOpts := Options{
 		Register:        register.DefaultRegister,
 		Logger:          logger.DefaultLogger,
 		Context:         context.Background(),
 		Meter:           meter.DefaultMeter,
-		Codec:    codec.DefaultCodec,
+		Codecs:          make(map[string]codec.Codec),
 		Tracer:          tracer.DefaultTracer,
+		GracefulTimeout: DefaultGracefulTimeout,
 	}
 	for _, o := range opts {
-		o(&options)
-	}
-	return options
-}
-
-// Context sets the context option
-func Context(ctx context.Context) Option {
-	return func(o *Options) {
-		o.Context = ctx
+		o(&newOpts)
 	}
+	return newOpts
 }
 
 // PublishOptions struct
 type PublishOptions struct {
 	// Context holds external options
 	Context context.Context
+	// Message metadata usually passed as message headers
+	Metadata metadata.Metadata
+	// Content-Type of message for marshal
+	ContentType string
+	// Topic destination
+	Topic string
 	// BodyOnly flag says the message contains raw body bytes
 	BodyOnly bool
 }
 
 // NewPublishOptions creates PublishOptions struct
-func NewPublishOptions(opts ...PublishOption) PublishOptions {
+func NewPublishOptions(opts ...options.Option) PublishOptions {
 	options := PublishOptions{
 		Context: context.Background(),
 	}
@@ -80,16 +85,21 @@ func NewPublishOptions(opts ...PublishOption) PublishOptions {
 	return options
 }
 
+// PublishTopic pass topic for messages
+func PublishTopic(t string) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, t, ".Topic")
+	}
+}
+
 // SubscribeOptions struct
 type SubscribeOptions struct {
 	// Context holds external options
 	Context context.Context
-	// ErrorHandler used when broker can't unmarshal incoming message
-	ErrorHandler Handler
-	// BatchErrorHandler used when broker can't unmashal incoming messages
-	BatchErrorHandler BatchHandler
-	// Group holds consumer group
-	Group string
+	// ErrorHandler used when broker have error while processing message
+	ErrorHandler interface{}
+	// QueueGroup holds consumer group
+	QueueGroup string
 	// AutoAck flag specifies auto ack of incoming message when no error happens
 	AutoAck bool
 	// BodyOnly flag specifies that message contains only body bytes without header
@@ -100,179 +110,16 @@ type SubscribeOptions struct {
 	BatchWait time.Duration
 }
 
-// Option func
-type Option func(*Options)
-
-// PublishOption func
-type PublishOption func(*PublishOptions)
-
-// PublishBodyOnly publish only body of the message
-func PublishBodyOnly(b bool) PublishOption {
-	return func(o *PublishOptions) {
-		o.BodyOnly = b
-	}
-}
-
-// PublishContext sets the context
-func PublishContext(ctx context.Context) PublishOption {
-	return func(o *PublishOptions) {
-		o.Context = ctx
-	}
-}
-
-// Addrs sets the host addresses to be used by the broker
-func Addrs(addrs ...string) Option {
-	return func(o *Options) {
-		o.Addrs = addrs
-	}
-}
-
-// Codec sets the codec used for encoding/decoding used where
-// a broker does not support headers
-func Codec(c codec.Codec) Option {
-	return func(o *Options) {
-		o.Codec = c
-	}
-}
-
 // ErrorHandler will catch all broker errors that cant be handled
 // in normal way, for example Codec errors
-func ErrorHandler(h Handler) Option {
-	return func(o *Options) {
-		o.ErrorHandler = h
+func ErrorHandler(h interface{}) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, h, ".ErrorHandler")
 	}
 }
 
-// BatchErrorHandler will catch all broker errors that cant be handled
-// in normal way, for example Codec errors
-func BatchErrorHandler(h BatchHandler) Option {
-	return func(o *Options) {
-		o.BatchErrorHandler = h
-	}
-}
-
-// SubscribeErrorHandler will catch all broker errors that cant be handled
-// in normal way, for example Codec errors
-func SubscribeErrorHandler(h Handler) SubscribeOption {
-	return func(o *SubscribeOptions) {
-		o.ErrorHandler = h
-	}
-}
-
-// SubscribeBatchErrorHandler will catch all broker errors that cant be handled
-// in normal way, for example Codec errors
-func SubscribeBatchErrorHandler(h BatchHandler) SubscribeOption {
-	return func(o *SubscribeOptions) {
-		o.BatchErrorHandler = h
-	}
-}
-
-// Queue sets the subscribers queue
-// Deprecated
-func Queue(name string) SubscribeOption {
-	return func(o *SubscribeOptions) {
-		o.Group = name
-	}
-}
-
-// SubscribeGroup sets the name of the queue to share messages on
-func SubscribeGroup(name string) SubscribeOption {
-	return func(o *SubscribeOptions) {
-		o.Group = name
-	}
-}
-
-// Register sets register option
-func Register(r register.Register) Option {
-	return func(o *Options) {
-		o.Register = r
-	}
-}
-
-// TLSConfig sets the TLS Config
-func TLSConfig(t *tls.Config) Option {
-	return func(o *Options) {
-		o.TLSConfig = t
-	}
-}
-
-// Logger sets the logger
-func Logger(l logger.Logger) Option {
-	return func(o *Options) {
-		o.Logger = l
-	}
-}
-
-// Tracer to be used for tracing
-func Tracer(t tracer.Tracer) Option {
-	return func(o *Options) {
-		o.Tracer = t
-	}
-}
-
-// Meter sets the meter
-func Meter(m meter.Meter) Option {
-	return func(o *Options) {
-		o.Meter = m
-	}
-}
-
-// Name sets the name
-func Name(n string) Option {
-	return func(o *Options) {
-		o.Name = n
-	}
-}
-
-// SubscribeContext set context
-func SubscribeContext(ctx context.Context) SubscribeOption {
-	return func(o *SubscribeOptions) {
-		o.Context = ctx
-	}
-}
-
-// DisableAutoAck disables auto ack
-// Deprecated
-func DisableAutoAck() SubscribeOption {
-	return func(o *SubscribeOptions) {
-		o.AutoAck = false
-	}
-}
-
-// SubscribeAutoAck contol auto acking of messages
-// after they have been handled.
-func SubscribeAutoAck(b bool) SubscribeOption {
-	return func(o *SubscribeOptions) {
-		o.AutoAck = b
-	}
-}
-
-// SubscribeBodyOnly consumes only body of the message
-func SubscribeBodyOnly(b bool) SubscribeOption {
-	return func(o *SubscribeOptions) {
-		o.BodyOnly = b
-	}
-}
-
-// SubscribeBatchSize specifies max batch size
-func SubscribeBatchSize(n int) SubscribeOption {
-	return func(o *SubscribeOptions) {
-		o.BatchSize = n
-	}
-}
-
-// SubscribeBatchWait specifies max batch wait time
-func SubscribeBatchWait(td time.Duration) SubscribeOption {
-	return func(o *SubscribeOptions) {
-		o.BatchWait = td
-	}
-}
-
-// SubscribeOption func
-type SubscribeOption func(*SubscribeOptions)
-
 // NewSubscribeOptions creates new SubscribeOptions
-func NewSubscribeOptions(opts ...SubscribeOption) SubscribeOptions {
+func NewSubscribeOptions(opts ...options.Option) SubscribeOptions {
 	options := SubscribeOptions{
 		AutoAck: true,
 		Context: context.Background(),
@@ -282,3 +129,39 @@ func NewSubscribeOptions(opts ...SubscribeOption) SubscribeOptions {
 	}
 	return options
 }
+
+// SubscribeAutoAck contol auto acking of messages
+// after they have been handled.
+func SubscribeAutoAck(b bool) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, b, ".AutoAck")
+	}
+}
+
+// BodyOnly transfer only body without
+func BodyOnly(b bool) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, b, ".BodyOnly")
+	}
+}
+
+// SubscribeBatchSize specifies max batch size
+func SubscribeBatchSize(n int) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, n, ".BatchSize")
+	}
+}
+
+// SubscribeBatchWait specifies max batch wait time
+func SubscribeBatchWait(td time.Duration) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, td, ".BatchWait")
+	}
+}
+
+// SubscribeQueueGroup sets the shared queue name distributed messages across subscribers
+func SubscribeQueueGroup(n string) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, n, ".QueueGroup")
+	}
+}

broker/subscriber.go

@@ -0,0 +1,98 @@
+package broker
+
+import (
+	"fmt"
+	"reflect"
+	"strings"
+	"unicode"
+	"unicode/utf8"
+)
+
+const (
+	subSig      = "func(context.Context, interface{}) error"
+	batchSubSig = "func([]context.Context, []interface{}) error"
+)
+
+// Precompute the reflect type for error. Can't use error directly
+// because Typeof takes an empty interface value. This is annoying.
+var typeOfError = reflect.TypeOf((*error)(nil)).Elem()
+
+// Is this an exported - upper case - name?
+func isExported(name string) bool {
+	r, _ := utf8.DecodeRuneInString(name)
+	return unicode.IsUpper(r)
+}
+
+// Is this type exported or a builtin?
+func isExportedOrBuiltinType(t reflect.Type) bool {
+	for t.Kind() == reflect.Ptr {
+		t = t.Elem()
+	}
+	// PkgPath will be non-empty even for an exported type,
+	// so we need to check the type name as well.
+	return isExported(t.Name()) || t.PkgPath() == ""
+}
+
+// ValidateSubscriber func signature
+func ValidateSubscriber(sub interface{}) error {
+	typ := reflect.TypeOf(sub)
+	var argType reflect.Type
+	switch typ.Kind() {
+	case reflect.Func:
+		name := "Func"
+		switch typ.NumIn() {
+		case 1: // func(Message) error
+
+		case 2: // func(context.Context, Message) error or func(context.Context, []Message) error
+			argType = typ.In(2)
+			// if sub.Options().Batch {
+			if argType.Kind() != reflect.Slice {
+				return fmt.Errorf("subscriber %v dont have required signature %s", name, batchSubSig)
+			}
+			if strings.Compare(fmt.Sprintf("%v", argType), "[]interface{}") == 0 {
+				return fmt.Errorf("subscriber %v dont have required signaure %s", name, batchSubSig)
+			}
+		//	}
+		default:
+			return fmt.Errorf("subscriber %v takes wrong number of args: %v required signature %s or %s", name, typ.NumIn(), subSig, batchSubSig)
+		}
+		if !isExportedOrBuiltinType(argType) {
+			return fmt.Errorf("subscriber %v argument type not exported: %v", name, argType)
+		}
+		if typ.NumOut() != 1 {
+			return fmt.Errorf("subscriber %v has wrong number of return values: %v require signature %s or %s",
+				name, typ.NumOut(), subSig, batchSubSig)
+		}
+		if returnType := typ.Out(0); returnType != typeOfError {
+			return fmt.Errorf("subscriber %v returns %v not error", name, returnType.String())
+		}
+	default:
+		hdlr := reflect.ValueOf(sub)
+		name := reflect.Indirect(hdlr).Type().Name()
+
+		for m := 0; m < typ.NumMethod(); m++ {
+			method := typ.Method(m)
+			switch method.Type.NumIn() {
+			case 3:
+				argType = method.Type.In(2)
+			default:
+				return fmt.Errorf("subscriber %v.%v takes wrong number of args: %v required signature %s or %s",
+					name, method.Name, method.Type.NumIn(), subSig, batchSubSig)
+			}
+
+			if !isExportedOrBuiltinType(argType) {
+				return fmt.Errorf("%v argument type not exported: %v", name, argType)
+			}
+			if method.Type.NumOut() != 1 {
+				return fmt.Errorf(
+					"subscriber %v.%v has wrong number of return values: %v require signature %s or %s",
+					name, method.Name, method.Type.NumOut(), subSig, batchSubSig)
+			}
+			if returnType := method.Type.Out(0); returnType != typeOfError {
+				return fmt.Errorf("subscriber %v.%v returns %v not error", name, method.Name, returnType.String())
+			}
+		}
+	}
+
+	return nil
+}

client/backoff.go

@@ -5,7 +5,7 @@ import (
 	"math"
 	"time"
 
-	"go.unistack.org/micro/v3/util/backoff"
+	"go.unistack.org/micro/v4/util/backoff"
 )
 
 // BackoffFunc is the backoff call func

client/client.go

@@ -1,19 +1,19 @@
 // Package client is an interface for an RPC client
-package client // import "go.unistack.org/micro/v3/client"
+package client // import "go.unistack.org/micro/v4/client"
 
 import (
 	"context"
 	"time"
 
-	"go.unistack.org/micro/v3/codec"
-	"go.unistack.org/micro/v3/metadata"
+	"go.unistack.org/micro/v4/codec"
+	"go.unistack.org/micro/v4/options"
 )
 
 var (
 	// DefaultClient is the global default client
 	DefaultClient = NewClient()
 	// DefaultContentType is the default content-type if not specified
-	DefaultContentType = "application/json"
+	DefaultContentType = ""
 	// DefaultBackoff is the default backoff function for retries (minimum 10 millisecond and maximum 5 second)
 	DefaultBackoff = BackoffInterval(10*time.Millisecond, 5*time.Second)
 	// DefaultRetry is the default check-for-retry function for retries
@@ -22,6 +22,8 @@ var (
 	DefaultRetries = 0
 	// DefaultRequestTimeout is the default request timeout
 	DefaultRequestTimeout = time.Second * 5
+	// DefaultDialTimeout the default dial timeout
+	DefaultDialTimeout = time.Second * 5
 	// DefaultPoolSize sets the connection pool size
 	DefaultPoolSize = 100
 	// DefaultPoolTTL sets the connection pool ttl
@@ -33,25 +35,14 @@ var (
 // It also supports bidirectional streaming of requests.
 type Client interface {
 	Name() string
-	Init(opts ...Option) error
+	Init(opts ...options.Option) error
 	Options() Options
-	NewMessage(topic string, msg interface{}, opts ...MessageOption) Message
-	NewRequest(service string, endpoint string, req interface{}, opts ...RequestOption) Request
-	Call(ctx context.Context, req Request, rsp interface{}, opts ...CallOption) error
-	Stream(ctx context.Context, req Request, opts ...CallOption) (Stream, error)
-	Publish(ctx context.Context, msg Message, opts ...PublishOption) error
-	BatchPublish(ctx context.Context, msg []Message, opts ...PublishOption) error
+	NewRequest(service string, endpoint string, req interface{}, opts ...options.Option) Request
+	Call(ctx context.Context, req Request, rsp interface{}, opts ...options.Option) error
+	Stream(ctx context.Context, req Request, opts ...options.Option) (Stream, error)
 	String() string
 }
 
-// Message is the interface for publishing asynchronously
-type Message interface {
-	Topic() string
-	Payload() interface{}
-	ContentType() string
-	Metadata() metadata.Metadata
-}
-
 // Request is the interface for a synchronous request used by Call or Stream
 type Request interface {
 	// The service to call
@@ -68,16 +59,22 @@ type Request interface {
 	Codec() codec.Codec
 	// indicates whether the request will be a streaming one rather than unary
 	Stream() bool
+	// Header data
+	// Header() metadata.Metadata
 }
 
 // Response is the response received from a service
 type Response interface {
 	// Read the response
 	Codec() codec.Codec
+	// The content type
+	// ContentType() string
 	// Header data
-	Header() metadata.Metadata
+	// Header() metadata.Metadata
 	// Read the undecoded response
 	Read() ([]byte, error)
+	// The unencoded request body
+	// Body() interface{}
 }
 
 // Stream is the interface for a bidirectional synchronous stream
@@ -103,18 +100,3 @@ type Stream interface {
 	// CloseSend closes the send direction of the stream
 	CloseSend() error
 }
-
-// Option used by the Client
-type Option func(*Options)
-
-// CallOption used by Call or Stream
-type CallOption func(*CallOptions)
-
-// PublishOption used by Publish
-type PublishOption func(*PublishOptions)
-
-// MessageOption used by NewMessage
-type MessageOption func(*MessageOptions)
-
-// RequestOption used by NewRequest
-type RequestOption func(*RequestOptions)

client/client_call_options.go

@@ -2,22 +2,24 @@ package client
 
 import (
 	"context"
+
+	"go.unistack.org/micro/v4/options"
 )
 
 type clientCallOptions struct {
 	Client
-	opts []CallOption
+	opts []options.Option
 }
 
-func (s *clientCallOptions) Call(ctx context.Context, req Request, rsp interface{}, opts ...CallOption) error {
+func (s *clientCallOptions) Call(ctx context.Context, req Request, rsp interface{}, opts ...options.Option) error {
 	return s.Client.Call(ctx, req, rsp, append(s.opts, opts...)...)
 }
 
-func (s *clientCallOptions) Stream(ctx context.Context, req Request, opts ...CallOption) (Stream, error) {
+func (s *clientCallOptions) Stream(ctx context.Context, req Request, opts ...options.Option) (Stream, error) {
 	return s.Client.Stream(ctx, req, append(s.opts, opts...)...)
 }
 
 // NewClientCallOptions add CallOption to every call
-func NewClientCallOptions(c Client, opts ...CallOption) Client {
+func NewClientCallOptions(c Client, opts ...options.Option) Client {
 	return &clientCallOptions{c, opts}
 }

client/client_call_options_test.go

@@ -4,6 +4,8 @@ import (
 	"context"
 	"testing"
 	"time"
+
+	"go.unistack.org/micro/v4/options"
 )
 
 func TestNewClientCallOptions(t *testing.T) {
@@ -13,11 +15,11 @@ func TestNewClientCallOptions(t *testing.T) {
 		return fn
 	}
 	c := NewClientCallOptions(NewClient(),
-		WithAddress("127.0.0.1"),
+		options.Address("127.0.0.1"),
 		WithCallWrapper(w),
-		WithRequestTimeout(1*time.Millisecond),
-		WithRetries(0),
-		WithBackoff(BackoffInterval(10*time.Millisecond, 100*time.Millisecond)),
+		RequestTimeout(1*time.Millisecond),
+		Retries(0),
+		Backoff(BackoffInterval(10*time.Millisecond, 100*time.Millisecond)),
 	)
 	_ = c.Call(context.TODO(), c.NewRequest("service", "endpoint", nil), nil)
 	if !flag {

client/context.go

@@ -22,33 +22,3 @@ func NewContext(ctx context.Context, c Client) context.Context {
 	}
 	return context.WithValue(ctx, clientKey{}, c)
 }
-
-// SetPublishOption returns a function to setup a context with given value
-func SetPublishOption(k, v interface{}) PublishOption {
-	return func(o *PublishOptions) {
-		if o.Context == nil {
-			o.Context = context.Background()
-		}
-		o.Context = context.WithValue(o.Context, k, v)
-	}
-}
-
-// SetCallOption returns a function to setup a context with given value
-func SetCallOption(k, v interface{}) CallOption {
-	return func(o *CallOptions) {
-		if o.Context == nil {
-			o.Context = context.Background()
-		}
-		o.Context = context.WithValue(o.Context, k, v)
-	}
-}
-
-// SetOption returns a function to setup a context with given value
-func SetOption(k, v interface{}) Option {
-	return func(o *Options) {
-		if o.Context == nil {
-			o.Context = context.Background()
-		}
-		o.Context = context.WithValue(o.Context, k, v)
-	}
-}

client/context_test.go

@@ -38,36 +38,3 @@ func TestNewNilContext(t *testing.T) {
 		t.Fatal("NewContext not works")
 	}
 }
-
-func TestSetPublishOption(t *testing.T) {
-	type key struct{}
-	o := SetPublishOption(key{}, "test")
-	opts := &PublishOptions{}
-	o(opts)
-
-	if v, ok := opts.Context.Value(key{}).(string); !ok || v == "" {
-		t.Fatal("SetPublishOption not works")
-	}
-}
-
-func TestSetCallOption(t *testing.T) {
-	type key struct{}
-	o := SetCallOption(key{}, "test")
-	opts := &CallOptions{}
-	o(opts)
-
-	if v, ok := opts.Context.Value(key{}).(string); !ok || v == "" {
-		t.Fatal("SetCallOption not works")
-	}
-}
-
-func TestSetOption(t *testing.T) {
-	type key struct{}
-	o := SetOption(key{}, "test")
-	opts := &Options{}
-	o(opts)
-
-	if v, ok := opts.Context.Value(key{}).(string); !ok || v == "" {
-		t.Fatal("SetOption not works")
-	}
-}

client/lookup.go

@@ -4,8 +4,8 @@ import (
 	"context"
 	"sort"
 
-	"go.unistack.org/micro/v3/errors"
-	"go.unistack.org/micro/v3/router"
+	"go.unistack.org/micro/v4/errors"
+	"go.unistack.org/micro/v4/router"
 )
 
 // LookupFunc is used to lookup routes for a service

client/noop.go

@@ -5,11 +5,12 @@ import (
 	"fmt"
 	"time"
 
-	"go.unistack.org/micro/v3/broker"
-	"go.unistack.org/micro/v3/codec"
-	"go.unistack.org/micro/v3/errors"
-	"go.unistack.org/micro/v3/metadata"
-	"go.unistack.org/micro/v3/selector"
+	"go.unistack.org/micro/v4/codec"
+	"go.unistack.org/micro/v4/errors"
+	"go.unistack.org/micro/v4/metadata"
+	"go.unistack.org/micro/v4/options"
+	"go.unistack.org/micro/v4/selector"
+	"go.unistack.org/micro/v4/semconv"
 )
 
 // DefaultCodecs will be used to encode/decode data
@@ -21,12 +22,6 @@ type noopClient struct {
 	opts Options
 }
 
-type noopMessage struct {
-	topic   string
-	payload interface{}
-	opts    MessageOptions
-}
-
 type noopRequest struct {
 	body        interface{}
 	codec       codec.Codec
@@ -38,16 +33,12 @@ type noopRequest struct {
 }
 
 // NewClient returns new noop client
-func NewClient(opts ...Option) Client {
+func NewClient(opts ...options.Option) Client {
 	nc := &noopClient{opts: NewOptions(opts...)}
 	// wrap in reverse
 
 	c := Client(nc)
 
-	for i := len(nc.opts.Wrappers); i > 0; i-- {
-		c = nc.opts.Wrappers[i-1](c)
-	}
-
 	return c
 }
 
@@ -142,22 +133,6 @@ func (n *noopStream) CloseSend() error {
 	return nil
 }
 
-func (n *noopMessage) Topic() string {
-	return n.topic
-}
-
-func (n *noopMessage) Payload() interface{} {
-	return n.payload
-}
-
-func (n *noopMessage) ContentType() string {
-	return n.opts.ContentType
-}
-
-func (n *noopMessage) Metadata() metadata.Metadata {
-	return n.opts.Metadata
-}
-
 func (n *noopClient) newCodec(contentType string) (codec.Codec, error) {
 	if cf, ok := n.opts.Codecs[contentType]; ok {
 		return cf, nil
@@ -168,7 +143,7 @@ func (n *noopClient) newCodec(contentType string) (codec.Codec, error) {
 	return nil, codec.ErrUnknownContentType
 }
 
-func (n *noopClient) Init(opts ...Option) error {
+func (n *noopClient) Init(opts ...options.Option) error {
 	for _, o := range opts {
 		o(&n.opts)
 	}
@@ -183,7 +158,7 @@ func (n *noopClient) String() string {
 	return "noop"
 }
 
-func (n *noopClient) Call(ctx context.Context, req Request, rsp interface{}, opts ...CallOption) error {
+func (n *noopClient) Call(ctx context.Context, req Request, rsp interface{}, opts ...options.Option) error {
 	// make a copy of call opts
 	callOpts := n.opts.CallOptions
 	for _, opt := range opts {
@@ -200,7 +175,7 @@ func (n *noopClient) Call(ctx context.Context, req Request, rsp interface{}, opt
 	} else {
 		// got a deadline so no need to setup context
 		// but we need to set the timeout we pass along
-		opt := WithRequestTimeout(time.Until(d))
+		opt := RequestTimeout(time.Until(d))
 		opt(&callOpts)
 	}
 
@@ -285,6 +260,9 @@ func (n *noopClient) Call(ctx context.Context, req Request, rsp interface{}, opt
 	ch := make(chan error, callOpts.Retries)
 	var gerr error
 
+	ts := time.Now()
+	endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Endpoint())
+	n.opts.Meter.Counter(semconv.ClientRequestInflight, "endpoint", endpoint).Inc()
 	for i := 0; i <= callOpts.Retries; i++ {
 		go func() {
 			ch <- call(i)
@@ -312,6 +290,16 @@ func (n *noopClient) Call(ctx context.Context, req Request, rsp interface{}, opt
 		}
 	}
 
+	if gerr != nil {
+		n.opts.Meter.Counter(semconv.ClientRequestTotal, "endpoint", endpoint, "status", "failure").Inc()
+	} else {
+		n.opts.Meter.Counter(semconv.ClientRequestTotal, "endpoint", endpoint, "status", "success").Inc()
+	}
+	n.opts.Meter.Counter(semconv.ClientRequestInflight, "endpoint", endpoint).Dec()
+	te := time.Since(ts)
+	n.opts.Meter.Summary(semconv.ClientRequestLatencyMicroseconds, "endpoint", endpoint).Update(te.Seconds())
+	n.opts.Meter.Histogram(semconv.ClientRequestDurationSeconds, "endpoint", endpoint).Update(te.Seconds())
+
 	return gerr
 }
 
@@ -319,16 +307,11 @@ func (n *noopClient) call(ctx context.Context, addr string, req Request, rsp int
 	return nil
 }
 
-func (n *noopClient) NewRequest(service, endpoint string, req interface{}, opts ...RequestOption) Request {
+func (n *noopClient) NewRequest(service, endpoint string, req interface{}, opts ...options.Option) Request {
 	return &noopRequest{service: service, endpoint: endpoint}
 }
 
-func (n *noopClient) NewMessage(topic string, msg interface{}, opts ...MessageOption) Message {
-	options := NewMessageOptions(append([]MessageOption{MessageContentType(n.opts.ContentType)}, opts...)...)
-	return &noopMessage{topic: topic, payload: msg, opts: options}
-}
-
-func (n *noopClient) Stream(ctx context.Context, req Request, opts ...CallOption) (Stream, error) {
+func (n *noopClient) Stream(ctx context.Context, req Request, opts ...options.Option) (Stream, error) {
 	var err error
 
 	// make a copy of call opts
@@ -347,7 +330,7 @@ func (n *noopClient) Stream(ctx context.Context, req Request, opts ...CallOption
 	} else {
 		// got a deadline so no need to setup context
 		// but we need to set the timeout we pass along
-		o := WithStreamTimeout(time.Until(d))
+		o := StreamTimeout(time.Until(d))
 		o(&callOpts)
 	}
 
@@ -414,7 +397,15 @@ func (n *noopClient) Stream(ctx context.Context, req Request, opts ...CallOption
 
 		node := next()
 
+		// ts := time.Now()
+		endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Endpoint())
+		n.opts.Meter.Counter(semconv.ClientRequestInflight, "endpoint", endpoint).Inc()
 		stream, cerr := n.stream(ctx, node, req, callOpts)
+		if cerr != nil {
+			n.opts.Meter.Counter(semconv.ClientRequestTotal, "endpoint", endpoint, "status", "failure").Inc()
+		} else {
+			n.opts.Meter.Counter(semconv.ClientRequestTotal, "endpoint", endpoint, "status", "success").Inc()
+		}
 
 		// record the result of the call to inform future routing decisions
 		if verr := n.opts.Selector.Record(node, cerr); verr != nil {
@@ -468,64 +459,6 @@ func (n *noopClient) Stream(ctx context.Context, req Request, opts ...CallOption
 	return nil, grr
 }
 
-func (n *noopClient) stream(ctx context.Context, addr string, req Request, opts CallOptions) (Stream, error) {
+func (n *noopClient) stream(ctx context.Context, addr string, req Request, opts CallOptions) (*noopStream, error) {
 	return &noopStream{}, nil
 }
-
-func (n *noopClient) BatchPublish(ctx context.Context, ps []Message, opts ...PublishOption) error {
-	return n.publish(ctx, ps, opts...)
-}
-
-func (n *noopClient) Publish(ctx context.Context, p Message, opts ...PublishOption) error {
-	return n.publish(ctx, []Message{p}, opts...)
-}
-
-func (n *noopClient) publish(ctx context.Context, ps []Message, opts ...PublishOption) error {
-	options := NewPublishOptions(opts...)
-
-	msgs := make([]*broker.Message, 0, len(ps))
-
-	for _, p := range ps {
-		md, ok := metadata.FromOutgoingContext(ctx)
-		if !ok {
-			md = metadata.New(0)
-		}
-		md[metadata.HeaderContentType] = p.ContentType()
-
-		topic := p.Topic()
-
-		// get the exchange
-		if len(options.Exchange) > 0 {
-			topic = options.Exchange
-		}
-
-		md[metadata.HeaderTopic] = topic
-
-		var body []byte
-
-		// passed in raw data
-		if d, ok := p.Payload().(*codec.Frame); ok {
-			body = d.Data
-		} else {
-			// use codec for payload
-			cf, err := n.newCodec(p.ContentType())
-			if err != nil {
-				return errors.InternalServerError("go.micro.client", err.Error())
-			}
-
-			// set the body
-			b, err := cf.Marshal(p.Payload())
-			if err != nil {
-				return errors.InternalServerError("go.micro.client", err.Error())
-			}
-			body = b
-		}
-
-		msgs = append(msgs, &broker.Message{Header: md, Body: body})
-	}
-
-	return n.opts.Broker.BatchPublish(ctx, msgs,
-		broker.PublishContext(options.Context),
-		broker.PublishBodyOnly(options.BodyOnly),
-	)
-}

client/options.go

@@ -6,31 +6,25 @@ import (
 	"net"
 	"time"
 
-	"go.unistack.org/micro/v3/broker"
-	"go.unistack.org/micro/v3/codec"
-	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v3/metadata"
-	"go.unistack.org/micro/v3/meter"
-	"go.unistack.org/micro/v3/network/transport"
-	"go.unistack.org/micro/v3/register"
-	"go.unistack.org/micro/v3/router"
-	"go.unistack.org/micro/v3/selector"
-	"go.unistack.org/micro/v3/selector/random"
-	"go.unistack.org/micro/v3/tracer"
+	"go.unistack.org/micro/v4/codec"
+	"go.unistack.org/micro/v4/logger"
+	"go.unistack.org/micro/v4/metadata"
+	"go.unistack.org/micro/v4/meter"
+	"go.unistack.org/micro/v4/options"
+	"go.unistack.org/micro/v4/router"
+	"go.unistack.org/micro/v4/selector"
+	"go.unistack.org/micro/v4/selector/random"
+	"go.unistack.org/micro/v4/tracer"
 )
 
 // Options holds client options
 type Options struct {
-	// Transport used for transfer messages
-	Transport transport.Transport
 	// Selector used to select needed address
 	Selector selector.Selector
 	// Logger used to log messages
 	Logger logger.Logger
 	// Tracer used for tracing
 	Tracer tracer.Tracer
-	// Broker used to publish messages
-	Broker broker.Broker
 	// Meter used for metrics
 	Meter meter.Meter
 	// Context is used for external options
@@ -49,8 +43,6 @@ type Options struct {
 	ContentType string
 	// Name is the client name
 	Name string
-	// Wrappers contains wrappers
-	Wrappers []Wrapper
 	// CallOptions contains default CallOptions
 	CallOptions CallOptions
 	// PoolSize connection pool size
@@ -59,10 +51,12 @@ type Options struct {
 	PoolTTL time.Duration
 	// ContextDialer used to connect
 	ContextDialer func(context.Context, string) (net.Conn, error)
+	// Hooks may contains Client func wrapper
+	Hooks options.Hooks
 }
 
 // NewCallOptions creates new call options struct
-func NewCallOptions(opts ...CallOption) CallOptions {
+func NewCallOptions(opts ...options.Option) CallOptions {
 	options := CallOptions{}
 	for _, o := range opts {
 		o(&options)
@@ -111,58 +105,14 @@ type CallOptions struct {
 }
 
 // ContextDialer pass ContextDialer to client
-func ContextDialer(fn func(context.Context, string) (net.Conn, error)) Option {
-	return func(o *Options) {
-		o.ContextDialer = fn
+func ContextDialer(fn func(context.Context, string) (net.Conn, error)) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, fn, ".ContextDialer")
 	}
 }
 
-// Context pass context to client
-func Context(ctx context.Context) Option {
-	return func(o *Options) {
-		o.Context = ctx
-	}
-}
-
-// NewPublishOptions create new PublishOptions struct from option
-func NewPublishOptions(opts ...PublishOption) PublishOptions {
-	options := PublishOptions{}
-	for _, o := range opts {
-		o(&options)
-	}
-	return options
-}
-
-// PublishOptions holds publish options
-type PublishOptions struct {
-	// Context used for external options
-	Context context.Context
-	// Exchange topic exchange name
-	Exchange string
-	// BodyOnly will publish only message body
-	BodyOnly bool
-}
-
-// NewMessageOptions creates message options struct
-func NewMessageOptions(opts ...MessageOption) MessageOptions {
-	options := MessageOptions{Metadata: metadata.New(1)}
-	for _, o := range opts {
-		o(&options)
-	}
-	return options
-}
-
-// MessageOptions holds client message options
-type MessageOptions struct {
-	// Metadata additional metadata
-	Metadata metadata.Metadata
-	// ContentType specify content-type of message
-	// deprecated
-	ContentType string
-}
-
 // NewRequestOptions creates new RequestOptions struct
-func NewRequestOptions(opts ...RequestOption) RequestOptions {
+func NewRequestOptions(opts ...options.Option) RequestOptions {
 	options := RequestOptions{}
 	for _, o := range opts {
 		o(&options)
@@ -181,7 +131,7 @@ type RequestOptions struct {
 }
 
 // NewOptions creates new options struct
-func NewOptions(opts ...Option) Options {
+func NewOptions(opts ...options.Option) Options {
 	options := Options{
 		Context:     context.Background(),
 		ContentType: DefaultContentType,
@@ -192,18 +142,16 @@ func NewOptions(opts ...Option) Options {
 			Retry:          DefaultRetry,
 			Retries:        DefaultRetries,
 			RequestTimeout: DefaultRequestTimeout,
-			DialTimeout:    transport.DefaultDialTimeout,
+			DialTimeout:    DefaultDialTimeout,
 		},
 		Lookup:   LookupRoute,
 		PoolSize: DefaultPoolSize,
 		PoolTTL:  DefaultPoolTTL,
 		Selector: random.NewSelector(),
 		Logger:   logger.DefaultLogger,
-		Broker:    broker.DefaultBroker,
 		Meter:    meter.DefaultMeter,
 		Tracer:   tracer.DefaultTracer,
 		Router:   router.DefaultRouter,
-		Transport: transport.DefaultTransport,
 	}
 
 	for _, o := range opts {
@@ -213,381 +161,131 @@ func NewOptions(opts ...Option) Options {
 	return options
 }
 
-// Broker to be used for pub/sub
-func Broker(b broker.Broker) Option {
-	return func(o *Options) {
-		o.Broker = b
-	}
-}
-
-// Tracer to be used for tracing
-func Tracer(t tracer.Tracer) Option {
-	return func(o *Options) {
-		o.Tracer = t
-	}
-}
-
-// Logger to be used for log mesages
-func Logger(l logger.Logger) Option {
-	return func(o *Options) {
-		o.Logger = l
-	}
-}
-
-// Meter to be used for metrics
-func Meter(m meter.Meter) Option {
-	return func(o *Options) {
-		o.Meter = m
-	}
-}
-
-// Codec to be used to encode/decode requests for a given content type
-func Codec(contentType string, c codec.Codec) Option {
-	return func(o *Options) {
-		o.Codecs[contentType] = c
-	}
-}
-
-// ContentType used by default if not specified
-func ContentType(ct string) Option {
-	return func(o *Options) {
-		o.ContentType = ct
-	}
-}
-
 // Proxy sets the proxy address
-func Proxy(addr string) Option {
-	return func(o *Options) {
-		o.Proxy = addr
+func Proxy(addr string) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, addr, ".Proxy")
 	}
 }
 
 // PoolSize sets the connection pool size
-func PoolSize(d int) Option {
-	return func(o *Options) {
-		o.PoolSize = d
+func PoolSize(d int) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, d, ".PoolSize")
 	}
 }
 
 // PoolTTL sets the connection pool ttl
-func PoolTTL(d time.Duration) Option {
-	return func(o *Options) {
-		o.PoolTTL = d
-	}
-}
-
-// Transport to use for communication e.g http, rabbitmq, etc
-func Transport(t transport.Transport) Option {
-	return func(o *Options) {
-		o.Transport = t
-	}
-}
-
-// Register sets the routers register
-func Register(r register.Register) Option {
-	return func(o *Options) {
-		if o.Router != nil {
-			_ = o.Router.Init(router.Register(r))
-		}
-	}
-}
-
-// Router is used to lookup routes for a service
-func Router(r router.Router) Option {
-	return func(o *Options) {
-		o.Router = r
+func PoolTTL(td time.Duration) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, td, ".PoolTTL")
 	}
 }
 
 // Selector is used to select a route
-func Selector(s selector.Selector) Option {
-	return func(o *Options) {
-		o.Selector = s
-	}
-}
-
-// Wrap adds a wrapper to the list of options passed into the client
-func Wrap(w Wrapper) Option {
-	return func(o *Options) {
-		o.Wrappers = append(o.Wrappers, w)
-	}
-}
-
-// WrapCall adds a wrapper to the list of CallFunc wrappers
-func WrapCall(cw ...CallWrapper) Option {
-	return func(o *Options) {
-		o.CallOptions.CallWrappers = append(o.CallOptions.CallWrappers, cw...)
+func Selector(s selector.Selector) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, s, ".Selector")
 	}
 }
 
 // Backoff is used to set the backoff function used when retrying Calls
-func Backoff(fn BackoffFunc) Option {
-	return func(o *Options) {
-		o.CallOptions.Backoff = fn
-	}
-}
-
-// Name sets the client name
-func Name(n string) Option {
-	return func(o *Options) {
-		o.Name = n
+func Backoff(fn BackoffFunc) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, fn, ".Backoff")
 	}
 }
 
 // Lookup sets the lookup function to use for resolving service names
-func Lookup(l LookupFunc) Option {
-	return func(o *Options) {
-		o.Lookup = l
+func Lookup(fn LookupFunc) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, fn, ".Lookup")
 	}
 }
 
-// TLSConfig specifies a *tls.Config
-func TLSConfig(t *tls.Config) Option {
-	return func(o *Options) {
-		// set the internal tls
-		o.TLSConfig = t
-
-		// set the default transport if one is not
-		// already set. Required for Init call below.
-
-		// set the transport tls
-		_ = o.Transport.Init(
-			transport.TLSConfig(t),
-		)
+// WithCallWrapper sets the retry function to be used when re-trying.
+func WithCallWrapper(fn CallWrapper) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, fn, ".CallWrappers")
 	}
 }
 
 // Retries sets the retry count when making the request.
-func Retries(i int) Option {
-	return func(o *Options) {
-		o.CallOptions.Retries = i
+func Retries(n int) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, n, ".Retries")
 	}
 }
 
 // Retry sets the retry function to be used when re-trying.
-func Retry(fn RetryFunc) Option {
-	return func(o *Options) {
-		o.CallOptions.Retry = fn
+func Retry(fn RetryFunc) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, fn, ".Retry")
 	}
 }
 
 // RequestTimeout is the request timeout.
-func RequestTimeout(d time.Duration) Option {
-	return func(o *Options) {
-		o.CallOptions.RequestTimeout = d
+func RequestTimeout(td time.Duration) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, td, ".RequestTimeout")
 	}
 }
 
 // StreamTimeout sets the stream timeout
-func StreamTimeout(d time.Duration) Option {
-	return func(o *Options) {
-		o.CallOptions.StreamTimeout = d
+func StreamTimeout(td time.Duration) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, td, ".StreamTimeout")
 	}
 }
 
 // DialTimeout sets the dial timeout
-func DialTimeout(d time.Duration) Option {
-	return func(o *Options) {
-		o.CallOptions.DialTimeout = d
-	}
-}
-
-// WithExchange sets the exchange to route a message through
-// Deprecated
-func WithExchange(e string) PublishOption {
-	return func(o *PublishOptions) {
-		o.Exchange = e
-	}
-}
-
-// PublishExchange sets the exchange to route a message through
-func PublishExchange(e string) PublishOption {
-	return func(o *PublishOptions) {
-		o.Exchange = e
-	}
-}
-
-// WithBodyOnly publish only message body
-// DERECATED
-func WithBodyOnly(b bool) PublishOption {
-	return func(o *PublishOptions) {
-		o.BodyOnly = b
-	}
-}
-
-// PublishBodyOnly publish only message body
-func PublishBodyOnly(b bool) PublishOption {
-	return func(o *PublishOptions) {
-		o.BodyOnly = b
-	}
-}
-
-// PublishContext sets the context in publish options
-func PublishContext(ctx context.Context) PublishOption {
-	return func(o *PublishOptions) {
-		o.Context = ctx
-	}
-}
-
-// WithContextDialer pass ContextDialer to client call
-func WithContextDialer(fn func(context.Context, string) (net.Conn, error)) CallOption {
-	return func(o *CallOptions) {
-		o.ContextDialer = fn
-	}
-}
-
-// WithContentType specifies call content type
-func WithContentType(ct string) CallOption {
-	return func(o *CallOptions) {
-		o.ContentType = ct
-	}
-}
-
-// WithAddress sets the remote addresses to use rather than using service discovery
-func WithAddress(a ...string) CallOption {
-	return func(o *CallOptions) {
-		o.Address = a
-	}
-}
-
-// WithCallWrapper is a CallOption which adds to the existing CallFunc wrappers
-func WithCallWrapper(cw ...CallWrapper) CallOption {
-	return func(o *CallOptions) {
-		o.CallWrappers = append(o.CallWrappers, cw...)
-	}
-}
-
-// WithBackoff is a CallOption which overrides that which
-// set in Options.CallOptions
-func WithBackoff(fn BackoffFunc) CallOption {
-	return func(o *CallOptions) {
-		o.Backoff = fn
-	}
-}
-
-// WithRetry is a CallOption which overrides that which
-// set in Options.CallOptions
-func WithRetry(fn RetryFunc) CallOption {
-	return func(o *CallOptions) {
-		o.Retry = fn
-	}
-}
-
-// WithRetries is a CallOption which overrides that which
-// set in Options.CallOptions
-func WithRetries(i int) CallOption {
-	return func(o *CallOptions) {
-		o.Retries = i
+func DialTimeout(td time.Duration) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, td, ".DialTimeout")
 	}
 }
 
 // WithResponseMetadata is a CallOption which adds metadata.Metadata to Options.CallOptions
-func WithResponseMetadata(md *metadata.Metadata) CallOption {
-	return func(o *CallOptions) {
-		o.ResponseMetadata = md
+func ResponseMetadata(md *metadata.Metadata) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, md, ".ResponseMetadata")
 	}
 }
 
 // WithRequestMetadata is a CallOption which adds metadata.Metadata to Options.CallOptions
-func WithRequestMetadata(md metadata.Metadata) CallOption {
-	return func(o *CallOptions) {
-		o.RequestMetadata = md
+func RequestMetadata(md metadata.Metadata) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, metadata.Copy(md), ".RequestMetadata")
 	}
 }
 
-// WithRequestTimeout is a CallOption which overrides that which
-// set in Options.CallOptions
-func WithRequestTimeout(d time.Duration) CallOption {
-	return func(o *CallOptions) {
-		o.RequestTimeout = d
-	}
-}
-
-// WithStreamTimeout sets the stream timeout
-func WithStreamTimeout(d time.Duration) CallOption {
-	return func(o *CallOptions) {
-		o.StreamTimeout = d
-	}
-}
-
-// WithDialTimeout is a CallOption which overrides that which
-// set in Options.CallOptions
-func WithDialTimeout(d time.Duration) CallOption {
-	return func(o *CallOptions) {
-		o.DialTimeout = d
-	}
-}
-
-// WithAuthToken is a CallOption which overrides the
+// AuthToken is a CallOption which overrides the
 // authorization header with the services own auth token
-func WithAuthToken(t string) CallOption {
-	return func(o *CallOptions) {
-		o.AuthToken = t
+func AuthToken(t string) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, t, ".AuthToken")
 	}
 }
 
-// WithNetwork is a CallOption which sets the network attribute
-func WithNetwork(n string) CallOption {
-	return func(o *CallOptions) {
-		o.Network = n
-	}
-}
-
-// WithRouter sets the router to use for this call
-func WithRouter(r router.Router) CallOption {
-	return func(o *CallOptions) {
-		o.Router = r
-	}
-}
-
-// WithSelector sets the selector to use for this call
-func WithSelector(s selector.Selector) CallOption {
-	return func(o *CallOptions) {
-		o.Selector = s
+// Network is a CallOption which sets the network attribute
+func Network(n string) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, n, ".Network")
 	}
 }
 
+/*
 // WithSelectOptions sets the options to pass to the selector for this call
-func WithSelectOptions(sops ...selector.SelectOption) CallOption {
+func WithSelectOptions(sops ...selector.SelectOption) options.Option {
 	return func(o *CallOptions) {
 		o.SelectOptions = sops
 	}
 }
-
-// WithMessageContentType sets the message content type
-// Deprecated
-func WithMessageContentType(ct string) MessageOption {
-	return func(o *MessageOptions) {
-		o.Metadata.Set(metadata.HeaderContentType, ct)
-		o.ContentType = ct
-	}
-}
-
-// MessageContentType sets the message content type
-func MessageContentType(ct string) MessageOption {
-	return func(o *MessageOptions) {
-		o.Metadata.Set(metadata.HeaderContentType, ct)
-		o.ContentType = ct
-	}
-}
-
-// MessageMetadata sets the message metadata
-func MessageMetadata(k, v string) MessageOption {
-	return func(o *MessageOptions) {
-		o.Metadata.Set(k, v)
-	}
-}
+*/
 
 // StreamingRequest specifies that request is streaming
-func StreamingRequest(b bool) RequestOption {
-	return func(o *RequestOptions) {
-		o.Stream = b
-	}
-}
-
-// RequestContentType specifies request content type
-func RequestContentType(ct string) RequestOption {
-	return func(o *RequestOptions) {
-		o.ContentType = ct
+func StreamingRequest(b bool) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, b, ".Stream")
 	}
 }

client/retry.go

@@ -3,7 +3,7 @@ package client
 import (
 	"context"
 
-	"go.unistack.org/micro/v3/errors"
+	"go.unistack.org/micro/v4/errors"
 )
 
 // RetryFunc that returning either false or a non-nil error will result in the call not being retried

client/retry_test.go

@@ -5,7 +5,7 @@ import (
 	"fmt"
 	"testing"
 
-	"go.unistack.org/micro/v3/errors"
+	"go.unistack.org/micro/v4/errors"
 )
 
 func TestRetryAlways(t *testing.T) {

client/test_request.go

@@ -1,7 +1,7 @@
 package client
 
 import (
-	"go.unistack.org/micro/v3/codec"
+	"go.unistack.org/micro/v4/codec"
 )
 
 type testRequest struct {

codec/codec.go

@@ -1,11 +1,11 @@
 // Package codec is an interface for encoding messages
-package codec // import "go.unistack.org/micro/v3/codec"
+package codec // import "go.unistack.org/micro/v4/codec"
 
 import (
 	"errors"
 	"io"
 
-	"go.unistack.org/micro/v3/metadata"
+	"go.unistack.org/micro/v4/metadata"
 )
 
 // Message types
@@ -84,3 +84,24 @@ func MarshalAppend(buf []byte, c Codec, v interface{}, opts ...Option) ([]byte,
 
 	return append(buf, mbuf...), nil
 }
+
+// RawMessage is a raw encoded JSON value.
+// It implements Marshaler and Unmarshaler and can be used to delay decoding or precompute a encoding.
+type RawMessage []byte
+
+// MarshalJSON returns m as the JSON encoding of m.
+func (m *RawMessage) MarshalJSON() ([]byte, error) {
+	if m == nil {
+		return []byte("null"), nil
+	}
+	return *m, nil
+}
+
+// UnmarshalJSON sets *m to a copy of data.
+func (m *RawMessage) UnmarshalJSON(data []byte) error {
+	if m == nil {
+		return errors.New("RawMessage UnmarshalJSON on nil pointer")
+	}
+	*m = append((*m)[0:0], data...)
+	return nil
+}

codec/frame.proto

@@ -1,4 +1,4 @@
-// Copyright 2021 Unistack LLC
+// Copyright 2021-2023 Unistack LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -17,7 +17,7 @@ syntax = "proto3";
 package micro.codec;
 
 option cc_enable_arenas = true;
-option go_package = "go.unistack.org/micro/v3/codec;codec";
+option go_package = "go.unistack.org/micro/v4/codec;codec";
 option java_multiple_files = true;
 option java_outer_classname = "MicroCodec";
 option java_package = "micro.codec";

codec/options.go

@@ -3,9 +3,9 @@ package codec
 import (
 	"context"
 
-	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v3/meter"
-	"go.unistack.org/micro/v3/tracer"
+	"go.unistack.org/micro/v4/logger"
+	"go.unistack.org/micro/v4/meter"
+	"go.unistack.org/micro/v4/tracer"
 )
 
 // Option func

config/config.go

@@ -1,11 +1,13 @@
 // Package config is an interface for dynamic configuration.
-package config // import "go.unistack.org/micro/v3/config"
+package config // import "go.unistack.org/micro/v4/config"
 
 import (
 	"context"
 	"errors"
 	"reflect"
 	"time"
+
+	"go.unistack.org/micro/v4/options"
 )
 
 type Validator interface {
@@ -37,15 +39,15 @@ type Config interface {
 	// Name returns name of config
 	Name() string
 	// Init the config
-	Init(opts ...Option) error
+	Init(opts ...options.Option) error
 	// Options in the config
 	Options() Options
 	// Load config from sources
-	Load(context.Context, ...LoadOption) error
+	Load(context.Context, ...options.Option) error
 	// Save config to sources
-	Save(context.Context, ...SaveOption) error
+	Save(context.Context, ...options.Option) error
 	// Watch a config for changes
-	Watch(context.Context, ...WatchOption) (Watcher, error)
+	Watch(context.Context, ...options.Option) (Watcher, error)
 	// String returns config type name
 	String() string
 }
@@ -59,7 +61,7 @@ type Watcher interface {
 }
 
 // Load loads config from config sources
-func Load(ctx context.Context, cs []Config, opts ...LoadOption) error {
+func Load(ctx context.Context, cs []Config, opts ...options.Option) error {
 	var err error
 	for _, c := range cs {
 		if err = c.Init(); err != nil {
@@ -124,35 +126,14 @@ func Validate(ctx context.Context, cfg interface{}) error {
 }
 
 var (
-	// DefaultAfterLoad default func that runs after config load
-	DefaultAfterLoad = func(ctx context.Context, c Config) error {
-		for _, fn := range c.Options().AfterLoad {
-			if err := fn(ctx, c); err != nil {
-				c.Options().Logger.Errorf(ctx, "%s AfterLoad err: %v", c.String(), err)
-				if !c.Options().AllowFail {
-					return err
-				}
-			}
-		}
-		return nil
-	}
-	// DefaultAfterSave default func that runs after config save
-	DefaultAfterSave = func(ctx context.Context, c Config) error {
-		for _, fn := range c.Options().AfterSave {
-			if err := fn(ctx, c); err != nil {
-				c.Options().Logger.Errorf(ctx, "%s AfterSave err: %v", c.String(), err)
-				if !c.Options().AllowFail {
-					return err
-				}
-			}
-		}
-		return nil
-	}
-	// DefaultBeforeLoad default func that runs before config load
+	// DefaultBeforeLoad default func that runs before config Load
 	DefaultBeforeLoad = func(ctx context.Context, c Config) error {
 		for _, fn := range c.Options().BeforeLoad {
+			if fn == nil {
+				return nil
+			}
 			if err := fn(ctx, c); err != nil {
-				c.Options().Logger.Errorf(ctx, "%s BeforeLoad err: %v", c.String(), err)
+				c.Options().Logger.Error(ctx, c.String()+" BeforeLoad error "+err.Error())
 				if !c.Options().AllowFail {
 					return err
 				}
@@ -160,11 +141,74 @@ var (
 		}
 		return nil
 	}
-	// DefaultBeforeSave default func that runs befora config save
+	// DefaultAfterLoad default func that runs after config Load
+	DefaultAfterLoad = func(ctx context.Context, c Config) error {
+		for _, fn := range c.Options().AfterLoad {
+			if fn == nil {
+				return nil
+			}
+			if err := fn(ctx, c); err != nil {
+				c.Options().Logger.Error(ctx, c.String()+" AfterLoad error "+err.Error())
+				if !c.Options().AllowFail {
+					return err
+				}
+			}
+		}
+		return nil
+	}
+	// DefaultBeforeSave default func that runs befora config Save
 	DefaultBeforeSave = func(ctx context.Context, c Config) error {
 		for _, fn := range c.Options().BeforeSave {
+			if fn == nil {
+				return nil
+			}
 			if err := fn(ctx, c); err != nil {
-				c.Options().Logger.Errorf(ctx, "%s BeforeSave err: %v", c.String(), err)
+				c.Options().Logger.Error(ctx, c.String()+" BeforeSave error "+err.Error())
+				if !c.Options().AllowFail {
+					return err
+				}
+			}
+		}
+		return nil
+	}
+	// DefaultAfterSave default func that runs after config Save
+	DefaultAfterSave = func(ctx context.Context, c Config) error {
+		for _, fn := range c.Options().AfterSave {
+			if fn == nil {
+				return nil
+			}
+			if err := fn(ctx, c); err != nil {
+				c.Options().Logger.Error(ctx, c.String()+" AfterSave error "+err.Error())
+				if !c.Options().AllowFail {
+					return err
+				}
+			}
+		}
+		return nil
+	}
+	// DefaultBeforeInit default func that runs befora config Init
+	DefaultBeforeInit = func(ctx context.Context, c Config) error {
+		for _, fn := range c.Options().BeforeInit {
+			if fn == nil {
+				return nil
+			}
+			if err := fn(ctx, c); err != nil {
+				c.Options().Logger.Error(ctx, c.String()+" BeforeInit error "+err.Error())
+				if !c.Options().AllowFail {
+					return err
+				}
+			}
+		}
+		return nil
+	}
+	// DefaultAfterInit default func that runs after config Init
+	DefaultAfterInit = func(ctx context.Context, c Config) error {
+		for _, fn := range c.Options().AfterSave {
+			if fn == nil {
+				return nil
+			}
+			if err := fn(ctx, c); err != nil {
+				c.Options().Logger.Error(ctx, c.String()+" AfterInit error "+err.Error())
 				if !c.Options().AllowFail {
 					return err
 				}

config/context.go

@@ -22,43 +22,3 @@ func NewContext(ctx context.Context, c Config) context.Context {
 	}
 	return context.WithValue(ctx, configKey{}, c)
 }
-
-// SetOption returns a function to setup a context with given value
-func SetOption(k, v interface{}) Option {
-	return func(o *Options) {
-		if o.Context == nil {
-			o.Context = context.Background()
-		}
-		o.Context = context.WithValue(o.Context, k, v)
-	}
-}
-
-// SetSaveOption returns a function to setup a context with given value
-func SetSaveOption(k, v interface{}) SaveOption {
-	return func(o *SaveOptions) {
-		if o.Context == nil {
-			o.Context = context.Background()
-		}
-		o.Context = context.WithValue(o.Context, k, v)
-	}
-}
-
-// SetLoadOption returns a function to setup a context with given value
-func SetLoadOption(k, v interface{}) LoadOption {
-	return func(o *LoadOptions) {
-		if o.Context == nil {
-			o.Context = context.Background()
-		}
-		o.Context = context.WithValue(o.Context, k, v)
-	}
-}
-
-// SetWatchOption returns a function to setup a context with given value
-func SetWatchOption(k, v interface{}) WatchOption {
-	return func(o *WatchOptions) {
-		if o.Context == nil {
-			o.Context = context.Background()
-		}
-		o.Context = context.WithValue(o.Context, k, v)
-	}
-}

config/context_test.go

@@ -40,47 +40,3 @@ func TestNewContext(t *testing.T) {
 		t.Fatal("NewContext not works")
 	}
 }
-
-func TestSetOption(t *testing.T) {
-	type key struct{}
-	o := SetOption(key{}, "test")
-	opts := &Options{}
-	o(opts)
-
-	if v, ok := opts.Context.Value(key{}).(string); !ok || v == "" {
-		t.Fatal("SetOption not works")
-	}
-}
-
-func TestSetSaveOption(t *testing.T) {
-	type key struct{}
-	o := SetSaveOption(key{}, "test")
-	opts := &SaveOptions{}
-	o(opts)
-
-	if v, ok := opts.Context.Value(key{}).(string); !ok || v == "" {
-		t.Fatal("SetSaveOption not works")
-	}
-}
-
-func TestSetLoadOption(t *testing.T) {
-	type key struct{}
-	o := SetLoadOption(key{}, "test")
-	opts := &LoadOptions{}
-	o(opts)
-
-	if v, ok := opts.Context.Value(key{}).(string); !ok || v == "" {
-		t.Fatal("SetLoadOption not works")
-	}
-}
-
-func TestSetWatchOption(t *testing.T) {
-	type key struct{}
-	o := SetWatchOption(key{}, "test")
-	opts := &WatchOptions{}
-	o(opts)
-
-	if v, ok := opts.Context.Value(key{}).(string); !ok || v == "" {
-		t.Fatal("SetWatchOption not works")
-	}
-}

config/default.go

@@ -5,9 +5,14 @@ import (
 	"reflect"
 	"strconv"
 	"strings"
+	"time"
 
-	"github.com/imdario/mergo"
-	rutil "go.unistack.org/micro/v3/util/reflect"
+	"dario.cat/mergo"
+	"github.com/google/uuid"
+	"go.unistack.org/micro/v4/options"
+	mid "go.unistack.org/micro/v4/util/id"
+	rutil "go.unistack.org/micro/v4/util/reflect"
+	mtime "go.unistack.org/micro/v4/util/time"
 )
 
 type defaultConfig struct {
@@ -18,15 +23,28 @@ func (c *defaultConfig) Options() Options {
 	return c.opts
 }
 
-func (c *defaultConfig) Init(opts ...Option) error {
+func (c *defaultConfig) Init(opts ...options.Option) error {
 	for _, o := range opts {
 		o(&c.opts)
 	}
+
+	if err := DefaultBeforeInit(c.opts.Context, c); err != nil && !c.opts.AllowFail {
+		return err
+	}
+
+	if err := DefaultAfterInit(c.opts.Context, c); err != nil && !c.opts.AllowFail {
+		return err
+	}
+
 	return nil
 }
 
-func (c *defaultConfig) Load(ctx context.Context, opts ...LoadOption) error {
-	if err := DefaultBeforeLoad(ctx, c); err != nil {
+func (c *defaultConfig) Load(ctx context.Context, opts ...options.Option) error {
+	if c.opts.SkipLoad != nil && c.opts.SkipLoad(ctx, c) {
+		return nil
+	}
+
+	if err := DefaultBeforeLoad(ctx, c); err != nil && !c.opts.AllowFail {
 		return err
 	}
 
@@ -49,21 +67,20 @@ func (c *defaultConfig) Load(ctx context.Context, opts ...LoadOption) error {
 		if !c.opts.AllowFail {
 			return err
 		}
-		return DefaultAfterLoad(ctx, c)
+		if err = DefaultAfterLoad(ctx, c); err != nil && !c.opts.AllowFail {
+			return err
+		}
 	}
 
 	if err = fillValues(reflect.ValueOf(src), c.opts.StructTag); err == nil {
 		err = mergo.Merge(dst, src, mopts...)
 	}
 
-	if err != nil {
-		c.opts.Logger.Errorf(ctx, "default load error: %v", err)
-		if !c.opts.AllowFail {
+	if err != nil && !c.opts.AllowFail {
 		return err
 	}
-	}
 
-	if err := DefaultAfterLoad(ctx, c); err != nil {
+	if err := DefaultAfterLoad(ctx, c); err != nil && !c.opts.AllowFail {
 		return err
 	}
 
@@ -75,6 +92,7 @@ func fillValue(value reflect.Value, val string) error {
 	if !rutil.IsEmpty(value) {
 		return nil
 	}
+
 	switch value.Kind() {
 	case reflect.Map:
 		t := value.Type()
@@ -113,6 +131,20 @@ func fillValue(value reflect.Value, val string) error {
 		}
 		value.Set(reflect.ValueOf(v))
 	case reflect.String:
+		switch val {
+		case "micro:generate uuid":
+			uid, err := uuid.NewRandom()
+			if err != nil {
+				return err
+			}
+			val = uid.String()
+		case "micro:generate id":
+			uid, err := mid.New()
+			if err != nil {
+				return err
+			}
+			val = uid
+		}
 		value.Set(reflect.ValueOf(val))
 	case reflect.Float32:
 		v, err := strconv.ParseFloat(val, 32)
@@ -151,11 +183,26 @@ func fillValue(value reflect.Value, val string) error {
 		}
 		value.Set(reflect.ValueOf(int32(v)))
 	case reflect.Int64:
+		switch {
+		case value.Type().String() == "time.Duration" && value.Type().PkgPath() == "time":
+			v, err := time.ParseDuration(val)
+			if err != nil {
+				return err
+			}
+			value.Set(reflect.ValueOf(v))
+		case value.Type().String() == "time.Duration" && value.Type().PkgPath() == "go.unistack.org/micro/v4/util/time":
+			v, err := mtime.ParseDuration(val)
+			if err != nil {
+				return err
+			}
+			value.SetInt(int64(v))
+		default:
 			v, err := strconv.ParseInt(val, 10, 64)
 			if err != nil {
 				return err
 			}
 			value.Set(reflect.ValueOf(v))
+		}
 	case reflect.Uint:
 		v, err := strconv.ParseUint(val, 10, 0)
 		if err != nil {
@@ -249,7 +296,11 @@ func fillValues(valueOf reflect.Value, tname string) error {
 	return nil
 }
 
-func (c *defaultConfig) Save(ctx context.Context, opts ...SaveOption) error {
+func (c *defaultConfig) Save(ctx context.Context, _ ...options.Option) error {
+	if c.opts.SkipSave != nil && c.opts.SkipSave(ctx, c) {
+		return nil
+	}
+
 	if err := DefaultBeforeSave(ctx, c); err != nil {
 		return err
 	}
@@ -269,12 +320,12 @@ func (c *defaultConfig) Name() string {
 	return c.opts.Name
 }
 
-func (c *defaultConfig) Watch(ctx context.Context, opts ...WatchOption) (Watcher, error) {
+func (c *defaultConfig) Watch(ctx context.Context, opts ...options.Option) (Watcher, error) {
 	return nil, ErrWatcherNotImplemented
 }
 
 // NewConfig returns new default config source
-func NewConfig(opts ...Option) Config {
+func NewConfig(opts ...options.Option) Config {
 	options := NewOptions(opts...)
 	if len(options.StructTag) == 0 {
 		options.StructTag = "default"

config/default_test.go

@@ -4,8 +4,11 @@ import (
 	"context"
 	"fmt"
 	"testing"
+	"time"
 
-	"go.unistack.org/micro/v3/config"
+	"go.unistack.org/micro/v4/config"
+	mid "go.unistack.org/micro/v4/util/id"
+	mtime "go.unistack.org/micro/v4/util/time"
 )
 
 type cfg struct {
@@ -13,6 +16,11 @@ type cfg struct {
 	IgnoreValue    string `json:"-"`
 	StructValue    *cfgStructValue
 	IntValue       int             `default:"99"`
+	DurationValue  time.Duration   `default:"10s"`
+	MDurationValue mtime.Duration  `default:"10s"`
+	MapValue       map[string]bool `default:"key1=true,key2=false"`
+	UUIDValue      string          `default:"micro:generate uuid"`
+	IDValue        string          `default:"micro:generate id"`
 }
 
 type cfgStructValue struct {
@@ -23,6 +31,9 @@ func (c *cfg) Validate() error {
 	if c.IntValue != 10 {
 		return fmt.Errorf("invalid IntValue %d != %d", 10, c.IntValue)
 	}
+	if c.MapValue["key1"] != true {
+		return fmt.Errorf("invalid MapValue %t != %t", true, c.MapValue["key1"])
+	}
 	return nil
 }
 
@@ -63,6 +74,21 @@ func TestDefault(t *testing.T) {
 	if conf.StringValue != "after_load" {
 		t.Fatal("AfterLoad option not working")
 	}
+	if len(conf.MapValue) != 2 {
+		t.Fatalf("map value invalid: %#+v\n", conf.MapValue)
+	}
+
+	if conf.UUIDValue == "" {
+		t.Fatalf("uuid value empty")
+	} else if len(conf.UUIDValue) != 36 {
+		t.Fatalf("uuid value invalid: %s", conf.UUIDValue)
+	}
+
+	if conf.IDValue == "" {
+		t.Fatalf("id value empty")
+	} else if len(conf.IDValue) != mid.DefaultSize {
+		t.Fatalf("id value invalid: %s", conf.IDValue)
+	}
 	_ = conf
 	// t.Logf("%#+v\n", conf)
 }
@@ -82,3 +108,19 @@ func TestValidate(t *testing.T) {
 		t.Fatal(err)
 	}
 }
+
+func TestString(t *testing.T) {
+	cfg := config.NewConfig()
+	res := cfg.String()
+	if res != "default" {
+		t.Fatalf("string value invalid: %s", res)
+	}
+}
+
+func TestName(t *testing.T) {
+	cfg := config.NewConfig()
+	res := cfg.Name()
+	if res != "" {
+		t.Fatal("name value not empty")
+	}
+}

config/options.go

@@ -4,10 +4,11 @@ import (
 	"context"
 	"time"
 
-	"go.unistack.org/micro/v3/codec"
-	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v3/meter"
-	"go.unistack.org/micro/v3/tracer"
+	"go.unistack.org/micro/v4/codec"
+	"go.unistack.org/micro/v4/logger"
+	"go.unistack.org/micro/v4/meter"
+	"go.unistack.org/micro/v4/options"
+	"go.unistack.org/micro/v4/tracer"
 )
 
 // Options hold the config options
@@ -28,23 +29,28 @@ type Options struct {
 	Name string
 	// StructTag name
 	StructTag string
-	// BeforeSave contains slice of funcs that runs before save
+	// BeforeSave contains slice of funcs that runs before Save
 	BeforeSave []func(context.Context, Config) error
-	// AfterLoad contains slice of funcs that runs after load
-	AfterLoad []func(context.Context, Config) error
-	// BeforeLoad contains slice of funcs that runs before load
-	BeforeLoad []func(context.Context, Config) error
-	// AfterSave contains slice of funcs that runs after save
+	// AfterSave contains slice of funcs that runs after Save
 	AfterSave []func(context.Context, Config) error
+	// BeforeLoad contains slice of funcs that runs before Load
+	BeforeLoad []func(context.Context, Config) error
+	// AfterLoad contains slice of funcs that runs after Load
+	AfterLoad []func(context.Context, Config) error
+	// BeforeInit contains slice of funcs that runs before Init
+	BeforeInit []func(context.Context, Config) error
+	// AfterInit contains slice of funcs that runs after Init
+	AfterInit []func(context.Context, Config) error
 	// AllowFail flag to allow fail in config source
 	AllowFail bool
+	// SkipLoad runs only if condition returns true
+	SkipLoad func(context.Context, Config) bool
+	// SkipSave runs only if condition returns true
+	SkipSave func(context.Context, Config) bool
 }
 
-// Option function signature
-type Option func(o *Options)
-
 // NewOptions new options struct with filed values
-func NewOptions(opts ...Option) Options {
+func NewOptions(opts ...options.Option) Options {
 	options := Options{
 		Logger:  logger.DefaultLogger,
 		Meter:   meter.DefaultMeter,
@@ -58,19 +64,16 @@ func NewOptions(opts ...Option) Options {
 	return options
 }
 
-// LoadOption function signature
-type LoadOption func(o *LoadOptions)
-
 // LoadOptions struct
 type LoadOptions struct {
 	Struct   interface{}
+	Context  context.Context
 	Override bool
 	Append   bool
-	Context  context.Context
 }
 
 // NewLoadOptions create LoadOptions struct with provided opts
-func NewLoadOptions(opts ...LoadOption) LoadOptions {
+func NewLoadOptions(opts ...options.Option) LoadOptions {
 	options := LoadOptions{}
 	for _, o := range opts {
 		o(&options)
@@ -79,44 +82,27 @@ func NewLoadOptions(opts ...LoadOption) LoadOptions {
 }
 
 // LoadOverride override values when load
-func LoadOverride(b bool) LoadOption {
-	return func(o *LoadOptions) {
-		o.Override = b
+func LoadOverride(b bool) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, b, ".Override")
 	}
 }
 
 // LoadAppend override values when load
-func LoadAppend(b bool) LoadOption {
-	return func(o *LoadOptions) {
-		o.Append = b
+func LoadAppend(b bool) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, b, ".Append")
 	}
 }
 
-// LoadStruct override struct for loading
-func LoadStruct(src interface{}) LoadOption {
-	return func(o *LoadOptions) {
-		o.Struct = src
-	}
-}
-
-// SaveOption function signature
-type SaveOption func(o *SaveOptions)
-
 // SaveOptions struct
 type SaveOptions struct {
 	Struct  interface{}
 	Context context.Context
 }
 
-// SaveStruct override struct for save to config
-func SaveStruct(src interface{}) SaveOption {
-	return func(o *SaveOptions) {
-		o.Struct = src
-	}
-}
-
 // NewSaveOptions fill SaveOptions struct
-func NewSaveOptions(opts ...SaveOption) SaveOptions {
+func NewSaveOptions(opts ...options.Option) SaveOptions {
 	options := SaveOptions{}
 	for _, o := range opts {
 		o(&options)
@@ -125,86 +111,65 @@ func NewSaveOptions(opts ...SaveOption) SaveOptions {
 }
 
 // AllowFail allows config source to fail
-func AllowFail(b bool) Option {
-	return func(o *Options) {
-		o.AllowFail = b
+func AllowFail(b bool) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, b, ".AllowFail")
+	}
+}
+
+// BeforeInit run funcs before config Init
+func BeforeInit(fn ...func(context.Context, Config) error) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, fn, ".BeforeInit")
+	}
+}
+
+// AfterInit run funcs after config Init
+func AfterInit(fn ...func(context.Context, Config) error) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, fn, ".AfterInit")
 	}
 }
 
 // BeforeLoad run funcs before config load
-func BeforeLoad(fn ...func(context.Context, Config) error) Option {
-	return func(o *Options) {
-		o.BeforeLoad = fn
+func BeforeLoad(fn ...func(context.Context, Config) error) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, fn, ".BeforeLoad")
 	}
 }
 
 // AfterLoad run funcs after config load
-func AfterLoad(fn ...func(context.Context, Config) error) Option {
-	return func(o *Options) {
-		o.AfterLoad = fn
+func AfterLoad(fn ...func(context.Context, Config) error) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, fn, ".AfterLoad")
 	}
 }
 
 // BeforeSave run funcs before save
-func BeforeSave(fn ...func(context.Context, Config) error) Option {
-	return func(o *Options) {
-		o.BeforeSave = fn
+func BeforeSave(fn ...func(context.Context, Config) error) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, fn, ".BeforeSave")
 	}
 }
 
 // AfterSave run fncs after save
-func AfterSave(fn ...func(context.Context, Config) error) Option {
-	return func(o *Options) {
-		o.AfterSave = fn
-	}
-}
-
-// Context pass context
-func Context(ctx context.Context) Option {
-	return func(o *Options) {
-		o.Context = ctx
-	}
-}
-
-// Codec sets the source codec
-func Codec(c codec.Codec) Option {
-	return func(o *Options) {
-		o.Codec = c
-	}
-}
-
-// Logger sets the logger
-func Logger(l logger.Logger) Option {
-	return func(o *Options) {
-		o.Logger = l
-	}
-}
-
-// Tracer to be used for tracing
-func Tracer(t tracer.Tracer) Option {
-	return func(o *Options) {
-		o.Tracer = t
+func AfterSave(fn ...func(context.Context, Config) error) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, fn, ".AfterSave")
 	}
 }
 
 // Struct used as config
-func Struct(v interface{}) Option {
-	return func(o *Options) {
-		o.Struct = v
+func Struct(v interface{}) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, v, ".Struct")
 	}
 }
 
 // StructTag sets the struct tag that used for filling
-func StructTag(name string) Option {
-	return func(o *Options) {
-		o.StructTag = name
-	}
-}
-
-// Name sets the name
-func Name(n string) Option {
-	return func(o *Options) {
-		o.Name = n
+func StructTag(name string) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, name, ".StructTag")
 	}
 }
 
@@ -222,11 +187,8 @@ type WatchOptions struct {
 	Coalesce bool
 }
 
-// WatchOption func signature
-type WatchOption func(*WatchOptions)
-
 // NewWatchOptions create WatchOptions struct with provided opts
-func NewWatchOptions(opts ...WatchOption) WatchOptions {
+func NewWatchOptions(opts ...options.Option) WatchOptions {
 	options := WatchOptions{
 		Context:     context.Background(),
 		MinInterval: DefaultWatcherMinInterval,
@@ -238,31 +200,20 @@ func NewWatchOptions(opts ...WatchOption) WatchOptions {
 	return options
 }
 
-// WatchContext pass context
-func WatchContext(ctx context.Context) WatchOption {
-	return func(o *WatchOptions) {
-		o.Context = ctx
-	}
-}
-
-// WatchCoalesce controls watch event combining
-func WatchCoalesce(b bool) WatchOption {
-	return func(o *WatchOptions) {
-		o.Coalesce = b
+// Coalesce controls watch event combining
+func WatchCoalesce(b bool) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, b, ".Coalesce")
 	}
 }
 
 // WatchInterval specifies min and max time.Duration for pulling changes
-func WatchInterval(min, max time.Duration) WatchOption {
-	return func(o *WatchOptions) {
-		o.MinInterval = min
-		o.MaxInterval = max
-	}
-}
-
-// WatchStruct overrides struct for fill
-func WatchStruct(src interface{}) WatchOption {
-	return func(o *WatchOptions) {
-		o.Struct = src
+func WatchInterval(min, max time.Duration) options.Option {
+	return func(src interface{}) error {
+		var err error
+		if err = options.Set(src, min, ".MinInterval"); err == nil {
+			err = options.Set(src, max, ".MaxInterval")
+		}
+		return err
 	}
 }

database/dsn.go

@@ -0,0 +1,159 @@
+package database
+
+import (
+	"crypto/tls"
+	"errors"
+	"fmt"
+	"net/url"
+	"strings"
+)
+
+var (
+	ErrInvalidDSNAddr      = errors.New("invalid dsn addr")
+	ErrInvalidDSNUnescaped = errors.New("dsn must be escaped")
+	ErrInvalidDSNNoSlash   = errors.New("dsn must contains slash")
+)
+
+type Config struct {
+	TLSConfig *tls.Config
+	Username  string
+	Password  string
+	Scheme    string
+	Host      string
+	Port      string
+	Database  string
+	Params    []string
+}
+
+func (cfg *Config) FormatDSN() string {
+	var s strings.Builder
+
+	if len(cfg.Scheme) > 0 {
+		s.WriteString(cfg.Scheme + "://")
+	}
+	// [username[:password]@]
+	if len(cfg.Username) > 0 {
+		s.WriteString(cfg.Username)
+		if len(cfg.Password) > 0 {
+			s.WriteByte(':')
+			s.WriteString(url.PathEscape(cfg.Password))
+		}
+		s.WriteByte('@')
+	}
+
+	// [host:port]
+	if len(cfg.Host) > 0 {
+		s.WriteString(cfg.Host)
+		if len(cfg.Port) > 0 {
+			s.WriteByte(':')
+			s.WriteString(cfg.Port)
+		}
+	}
+
+	// /dbname
+	s.WriteByte('/')
+	s.WriteString(url.PathEscape(cfg.Database))
+
+	for i := 0; i < len(cfg.Params); i += 2 {
+		if i == 0 {
+			s.WriteString("?")
+		} else {
+			s.WriteString("&")
+		}
+		s.WriteString(cfg.Params[i])
+		s.WriteString("=")
+		s.WriteString(cfg.Params[i+1])
+	}
+
+	return s.String()
+}
+
+func ParseDSN(dsn string) (*Config, error) {
+	cfg := &Config{}
+
+	// [user[:password]@][net[(addr)]]/dbname[?param1=value1&paramN=valueN]
+	// Find last '/' that goes before dbname
+	foundSlash := false
+	for i := len(dsn) - 1; i >= 0; i-- {
+		if dsn[i] != '/' {
+			continue
+		}
+
+		foundSlash = true
+		var j, k int
+
+		// left part is empty if i <= 0
+		if i > 0 {
+			// Find the first ':' in dsn
+			for j = i; j >= 0; j-- {
+				if dsn[j] == ':' {
+					cfg.Scheme = dsn[0:j]
+				}
+			}
+
+			// [username[:password]@][host]
+			// Find the last '@' in dsn[:i]
+			for j = i; j >= 0; j-- {
+				if dsn[j] == '@' {
+					// username[:password]
+					// Find the second ':' in dsn[:j]
+					for k = 0; k < j; k++ {
+						if dsn[k] == ':' {
+							if cfg.Scheme == dsn[:k] {
+								continue
+							}
+							var err error
+							cfg.Password, err = url.PathUnescape(dsn[k+1 : j])
+							if err != nil {
+								return nil, err
+							}
+							break
+						}
+					}
+					cfg.Username = dsn[len(cfg.Scheme)+3 : k]
+					break
+				}
+			}
+
+			for k = j + 1; k < i; k++ {
+				if dsn[k] == ':' {
+					cfg.Host = dsn[j+1 : k]
+					cfg.Port = dsn[k+1 : i]
+					break
+				}
+			}
+
+		}
+
+		// dbname[?param1=value1&...&paramN=valueN]
+		// Find the first '?' in dsn[i+1:]
+		for j = i + 1; j < len(dsn); j++ {
+			if dsn[j] == '?' {
+				parts := strings.Split(dsn[j+1:], "&")
+				cfg.Params = make([]string, 0, len(parts)*2)
+				for _, p := range parts {
+					k, v, found := strings.Cut(p, "=")
+					if !found {
+						continue
+					}
+					cfg.Params = append(cfg.Params, k, v)
+				}
+
+				break
+			}
+		}
+		var err error
+		dbname := dsn[i+1 : j]
+		if cfg.Database, err = url.PathUnescape(dbname); err != nil {
+			return nil, fmt.Errorf("invalid dbname %q: %w", dbname, err)
+		}
+
+		break
+	}
+
+	if !foundSlash && len(dsn) > 0 {
+		return nil, ErrInvalidDSNNoSlash
+	}
+
+	return cfg, nil
+}

database/dsn_test.go

@@ -0,0 +1,31 @@
+package database
+
+import (
+	"net/url"
+	"testing"
+)
+
+func TestParseDSN(t *testing.T) {
+	cfg, err := ParseDSN("postgres://username:p@ssword#@host:12345/dbname?key1=val2&key2=val2")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if cfg.Password != "p@ssword#" {
+		t.Fatalf("parsing error")
+	}
+}
+
+func TestFormatDSN(t *testing.T) {
+	src := "postgres://username:p@ssword#@host:12345/dbname?key1=val2&key2=val2"
+	cfg, err := ParseDSN(src)
+	if err != nil {
+		t.Fatal(err)
+	}
+	dst, err := url.PathUnescape(cfg.FormatDSN())
+	if err != nil {
+		t.Fatal(err)
+	}
+	if src != dst {
+		t.Fatalf("\n%s\n%s", src, dst)
+	}
+}

errors/errors.go

@@ -1,6 +1,6 @@
 // Package errors provides a way to return detailed information
 // for an RPC request error. The error is normally JSON encoded.
-package errors // import "go.unistack.org/micro/v3/errors"
+package errors // import "go.unistack.org/micro/v4/errors"
 
 import (
 	"bytes"

errors/errors.proto

@@ -1,4 +1,4 @@
-// Copyright 2021 Unistack LLC
+// Copyright 2021-2023 Unistack LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -17,7 +17,7 @@ syntax = "proto3";
 package micro.errors;
 
 option cc_enable_arenas = true;
-option go_package = "go.unistack.org/micro/v3/errors;errors";
+option go_package = "go.unistack.org/micro/v4/errors;errors";
 option java_multiple_files = true;
 option java_outer_classname = "MicroErrors";
 option java_package = "micro.errors";

event.go

@@ -1,27 +0,0 @@
-package micro
-
-import (
-	"context"
-
-	"go.unistack.org/micro/v3/client"
-)
-
-// Event is used to publish messages to a topic
-type Event interface {
-	// Publish publishes a message to the event topic
-	Publish(ctx context.Context, msg interface{}, opts ...client.PublishOption) error
-}
-
-type event struct {
-	c     client.Client
-	topic string
-}
-
-// NewEvent creates a new event publisher
-func NewEvent(topic string, c client.Client) Event {
-	return &event{c, topic}
-}
-
-func (e *event) Publish(ctx context.Context, msg interface{}, opts ...client.PublishOption) error {
-	return e.c.Publish(ctx, e.c.NewMessage(e.topic, msg), opts...)
-}

flow/context.go

@@ -22,13 +22,3 @@ func NewContext(ctx context.Context, f Flow) context.Context {
 	}
 	return context.WithValue(ctx, flowKey{}, f)
 }
-
-// SetOption returns a function to setup a context with given value
-func SetOption(k, v interface{}) Option {
-	return func(o *Options) {
-		if o.Context == nil {
-			o.Context = context.Background()
-		}
-		o.Context = context.WithValue(o.Context, k, v)
-	}
-}

flow/context_test.go

@@ -40,14 +40,3 @@ func TestNewContext(t *testing.T) {
 		t.Fatal("NewContext not works")
 	}
 }
-
-func TestSetOption(t *testing.T) {
-	type key struct{}
-	o := SetOption(key{}, "test")
-	opts := &Options{}
-	o(opts)
-
-	if v, ok := opts.Context.Value(key{}).(string); !ok || v == "" {
-		t.Fatal("SetOption not works")
-	}
-}

flow/dag_test.go

@@ -8,6 +8,7 @@ import (
 )
 
 func TestDeps(t *testing.T) {
+	t.Skip()
 	d := &dag.AcyclicGraph{}
 
 	v0 := d.Add(&node{"v0"})

flow/default.go

@@ -6,12 +6,14 @@ import (
 	"sync"
 
 	"github.com/silas/dag"
-	"go.unistack.org/micro/v3/client"
-	"go.unistack.org/micro/v3/codec"
-	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v3/metadata"
-	"go.unistack.org/micro/v3/store"
-	"go.unistack.org/micro/v3/util/id"
+	"go.unistack.org/micro/v4/client"
+	"go.unistack.org/micro/v4/codec"
+	"go.unistack.org/micro/v4/logger"
+	"go.unistack.org/micro/v4/metadata"
+	"go.unistack.org/micro/v4/options"
+	moptions "go.unistack.org/micro/v4/options"
+	"go.unistack.org/micro/v4/store"
+	"go.unistack.org/micro/v4/util/id"
 )
 
 type microFlow struct {
@@ -163,7 +165,7 @@ func (w *microWorkflow) Resume(ctx context.Context, id string) error {
 	return workflowStore.Write(ctx, "status", &codec.Frame{Data: []byte(StatusRunning.String())})
 }
 
-func (w *microWorkflow) Execute(ctx context.Context, req *Message, opts ...ExecuteOption) (string, error) {
+func (w *microWorkflow) Execute(ctx context.Context, req *Message, opts ...options.Option) (string, error) {
 	w.Lock()
 	if !w.init {
 		if err := w.g.Validate(); err != nil {
@@ -188,7 +190,7 @@ func (w *microWorkflow) Execute(ctx context.Context, req *Message, opts ...Execu
 	steps, err := w.getSteps(options.Start, options.Reverse)
 	if err != nil {
 		if werr := workflowStore.Write(w.opts.Context, "status", &codec.Frame{Data: []byte(StatusPending.String())}); werr != nil {
-			w.opts.Logger.Errorf(w.opts.Context, "store error: %v", werr)
+			w.opts.Logger.Error(w.opts.Context, "store write error", "error", werr.Error())
 		}
 		return "", err
 	}
@@ -200,19 +202,19 @@ func (w *microWorkflow) Execute(ctx context.Context, req *Message, opts ...Execu
 	nctx, cancel := context.WithCancel(ctx)
 	defer cancel()
 
-	nopts := make([]ExecuteOption, 0, len(opts)+5)
+	nopts := make([]moptions.Option, 0, len(opts)+5)
 
 	nopts = append(nopts,
-		ExecuteClient(w.opts.Client),
-		ExecuteTracer(w.opts.Tracer),
-		ExecuteLogger(w.opts.Logger),
-		ExecuteMeter(w.opts.Meter),
+		moptions.Client(w.opts.Client),
+		moptions.Tracer(w.opts.Tracer),
+		moptions.Logger(w.opts.Logger),
+		moptions.Meter(w.opts.Meter),
 	)
 	nopts = append(nopts, opts...)
 	done := make(chan struct{})
 
 	if werr := workflowStore.Write(w.opts.Context, "status", &codec.Frame{Data: []byte(StatusRunning.String())}); werr != nil {
-		w.opts.Logger.Errorf(w.opts.Context, "store error: %v", werr)
+		w.opts.Logger.Error(w.opts.Context, "store write error", "error", werr.Error())
 		return eid, werr
 	}
 	for idx := range steps {
@@ -237,7 +239,7 @@ func (w *microWorkflow) Execute(ctx context.Context, req *Message, opts ...Execu
 					return
 				}
 				if w.opts.Logger.V(logger.TraceLevel) {
-					w.opts.Logger.Tracef(nctx, "will be executed %v", steps[idx][nidx])
+					w.opts.Logger.Trace(nctx, fmt.Sprintf("step will be executed %v", steps[idx][nidx]))
 				}
 				cstep := steps[idx][nidx]
 				// nolint: nestif
@@ -257,21 +259,21 @@ func (w *microWorkflow) Execute(ctx context.Context, req *Message, opts ...Execu
 						if serr != nil {
 							step.SetStatus(StatusFailure)
 							if werr := stepStore.Write(ctx, step.ID()+w.opts.Store.Options().Separator+"rsp", serr); werr != nil && w.opts.Logger.V(logger.ErrorLevel) {
-								w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
+								w.opts.Logger.Error(ctx, "store write error", "error", werr.Error())
 							}
 							if werr := stepStore.Write(ctx, step.ID()+w.opts.Store.Options().Separator+"status", &codec.Frame{Data: []byte(StatusFailure.String())}); werr != nil && w.opts.Logger.V(logger.ErrorLevel) {
-								w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
+								w.opts.Logger.Error(ctx, "store write error", "error", werr.Error())
 							}
 							cherr <- serr
 							return
 						}
 						if werr := stepStore.Write(ctx, step.ID()+w.opts.Store.Options().Separator+"rsp", rsp); werr != nil {
-							w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
+							w.opts.Logger.Error(ctx, "store write error", "error", werr.Error())
 							cherr <- werr
 							return
 						}
 						if werr := stepStore.Write(ctx, step.ID()+w.opts.Store.Options().Separator+"status", &codec.Frame{Data: []byte(StatusSuccess.String())}); werr != nil {
-							w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
+							w.opts.Logger.Error(ctx, "store write error", "error", werr.Error())
 							cherr <- werr
 							return
 						}
@@ -290,16 +292,16 @@ func (w *microWorkflow) Execute(ctx context.Context, req *Message, opts ...Execu
 					if serr != nil {
 						cstep.SetStatus(StatusFailure)
 						if werr := stepStore.Write(ctx, cstep.ID()+w.opts.Store.Options().Separator+"rsp", serr); werr != nil && w.opts.Logger.V(logger.ErrorLevel) {
-							w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
+							w.opts.Logger.Error(ctx, "store write error", "error", werr.Error())
 						}
 						if werr := stepStore.Write(ctx, cstep.ID()+w.opts.Store.Options().Separator+"status", &codec.Frame{Data: []byte(StatusFailure.String())}); werr != nil && w.opts.Logger.V(logger.ErrorLevel) {
-							w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
+							w.opts.Logger.Error(ctx, "store write error", "error", werr.Error())
 						}
 						cherr <- serr
 						return
 					}
 					if werr := stepStore.Write(ctx, cstep.ID()+w.opts.Store.Options().Separator+"rsp", rsp); werr != nil {
-						w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
+						w.opts.Logger.Error(ctx, "store write error", "error", werr.Error())
 						cherr <- werr
 						return
 					}
@@ -317,7 +319,7 @@ func (w *microWorkflow) Execute(ctx context.Context, req *Message, opts ...Execu
 		return eid, nil
 	}
 
-	logger.Tracef(ctx, "wait for finish or error")
+	w.opts.Logger.Trace(ctx, "wait for finish or error")
 	select {
 	case <-nctx.Done():
 		err = nctx.Err()
@@ -333,15 +335,15 @@ func (w *microWorkflow) Execute(ctx context.Context, req *Message, opts ...Execu
 	switch {
 	case nctx.Err() != nil:
 		if werr := workflowStore.Write(w.opts.Context, "status", &codec.Frame{Data: []byte(StatusAborted.String())}); werr != nil {
-			w.opts.Logger.Errorf(w.opts.Context, "store error: %v", werr)
+			w.opts.Logger.Error(w.opts.Context, "store write error", "error", werr.Error())
 		}
 	case err == nil:
 		if werr := workflowStore.Write(w.opts.Context, "status", &codec.Frame{Data: []byte(StatusSuccess.String())}); werr != nil {
-			w.opts.Logger.Errorf(w.opts.Context, "store error: %v", werr)
+			w.opts.Logger.Error(w.opts.Context, "store write error", "error", werr.Error())
 		}
 	case err != nil:
 		if werr := workflowStore.Write(w.opts.Context, "status", &codec.Frame{Data: []byte(StatusFailure.String())}); werr != nil {
-			w.opts.Logger.Errorf(w.opts.Context, "store error: %v", werr)
+			w.opts.Logger.Error(w.opts.Context, "store write error", "error", werr.Error())
 		}
 	}
 
@@ -349,7 +351,7 @@ func (w *microWorkflow) Execute(ctx context.Context, req *Message, opts ...Execu
 }
 
 // NewFlow create new flow
-func NewFlow(opts ...Option) Flow {
+func NewFlow(opts ...options.Option) Flow {
 	options := NewOptions(opts...)
 	return &microFlow{opts: options}
 }
@@ -358,7 +360,7 @@ func (f *microFlow) Options() Options {
 	return f.opts
 }
 
-func (f *microFlow) Init(opts ...Option) error {
+func (f *microFlow) Init(opts ...options.Option) error {
 	for _, o := range opts {
 		o(&f.opts)
 	}
@@ -487,17 +489,17 @@ func (s *microCallStep) SetStatus(status Status) {
 	s.status = status
 }
 
-func (s *microCallStep) Execute(ctx context.Context, req *Message, opts ...ExecuteOption) (*Message, error) {
+func (s *microCallStep) Execute(ctx context.Context, req *Message, opts ...options.Option) (*Message, error) {
 	options := NewExecuteOptions(opts...)
 	if options.Client == nil {
 		return nil, ErrMissingClient
 	}
 	rsp := &codec.Frame{}
-	copts := []client.CallOption{client.WithRetries(0)}
+	copts := []moptions.Option{client.Retries(0)}
 	if options.Timeout > 0 {
 		copts = append(copts,
-			client.WithRequestTimeout(options.Timeout),
-			client.WithDialTimeout(options.Timeout))
+			client.RequestTimeout(options.Timeout),
+			client.DialTimeout(options.Timeout))
 	}
 	nctx := metadata.NewOutgoingContext(ctx, req.Header)
 	err := options.Client.Call(nctx, options.Client.NewRequest(s.service, s.method, &codec.Frame{Data: req.Body}), rsp, copts...)
@@ -570,18 +572,18 @@ func (s *microPublishStep) SetStatus(status Status) {
 	s.status = status
 }
 
-func (s *microPublishStep) Execute(ctx context.Context, req *Message, opts ...ExecuteOption) (*Message, error) {
+func (s *microPublishStep) Execute(ctx context.Context, req *Message, opts ...options.Option) (*Message, error) {
 	return nil, nil
 }
 
 // NewCallStep create new step with client.Call
-func NewCallStep(service string, name string, method string, opts ...StepOption) Step {
+func NewCallStep(service string, name string, method string, opts ...options.Option) Step {
 	options := NewStepOptions(opts...)
 	return &microCallStep{service: service, method: name + "." + method, opts: options}
 }
 
 // NewPublishStep create new step with client.Publish
-func NewPublishStep(topic string, opts ...StepOption) Step {
+func NewPublishStep(topic string, opts ...options.Option) Step {
 	options := NewStepOptions(opts...)
 	return &microPublishStep{topic: topic, opts: options}
 }

flow/flow.go

@@ -1,5 +1,5 @@
 // Package flow is an interface used for saga pattern microservice workflow
-package flow // import "go.unistack.org/micro/v3/flow"
+package flow // import "go.unistack.org/micro/v4/flow"
 
 import (
 	"context"
@@ -7,7 +7,8 @@ import (
 	"sync"
 	"sync/atomic"
 
-	"go.unistack.org/micro/v3/metadata"
+	"go.unistack.org/micro/v4/metadata"
+	"go.unistack.org/micro/v4/options"
 )
 
 var (
@@ -51,7 +52,7 @@ type Step interface {
 	// Endpoint returns rpc endpoint service_name.service_method or broker topic
 	Endpoint() string
 	// Execute step run
-	Execute(ctx context.Context, req *Message, opts ...ExecuteOption) (*Message, error)
+	Execute(ctx context.Context, req *Message, opts ...options.Option) (*Message, error)
 	// Requires returns dependent steps
 	Requires() []string
 	// Options returns step options
@@ -118,7 +119,7 @@ type Workflow interface {
 	// ID returns id of the workflow
 	ID() string
 	// Execute workflow with args, return execution id and error
-	Execute(ctx context.Context, req *Message, opts ...ExecuteOption) (string, error)
+	Execute(ctx context.Context, req *Message, opts ...options.Option) (string, error)
 	// RemoveSteps remove steps from workflow
 	RemoveSteps(steps ...Step) error
 	// AppendSteps append steps to workflow
@@ -140,7 +141,7 @@ type Flow interface {
 	// Options returns options
 	Options() Options
 	// Init initialize
-	Init(...Option) error
+	Init(...options.Option) error
 	// WorkflowCreate creates new workflow with specific id and steps
 	WorkflowCreate(ctx context.Context, id string, steps ...Step) (Workflow, error)
 	// WorkflowSave saves workflow

flow/flow_test.go

@@ -0,0 +1,36 @@
+package flow
+
+import (
+	"reflect"
+	"testing"
+)
+
+func FuzzMarshall(f *testing.F) {
+	f.Fuzz(func(t *testing.T, ref []byte) {
+		rm := RawMessage(ref)
+
+		b, err := rm.MarshalJSON()
+		if err != nil {
+			t.Errorf("Error MarshalJSON: %s", err)
+		}
+
+		if !reflect.DeepEqual(ref, b) {
+			t.Errorf("Error. Expected '%s', was '%s'", ref, b)
+		}
+	})
+}
+
+func FuzzUnmarshall(f *testing.F) {
+	f.Fuzz(func(t *testing.T, ref string) {
+		b := []byte(ref)
+		rm := RawMessage(b)
+
+		if err := rm.UnmarshalJSON(b); err != nil {
+			t.Errorf("Error UnmarshalJSON: %s", err)
+		}
+
+		if ref != string(rm) {
+			t.Errorf("Error. Expected '%s', was '%s'", ref, rm)
+		}
+	})
+}

flow/options.go

@@ -4,16 +4,14 @@ import (
 	"context"
 	"time"
 
-	"go.unistack.org/micro/v3/client"
-	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v3/meter"
-	"go.unistack.org/micro/v3/store"
-	"go.unistack.org/micro/v3/tracer"
+	"go.unistack.org/micro/v4/client"
+	"go.unistack.org/micro/v4/logger"
+	"go.unistack.org/micro/v4/meter"
+	"go.unistack.org/micro/v4/options"
+	"go.unistack.org/micro/v4/store"
+	"go.unistack.org/micro/v4/tracer"
 )
 
-// Option func
-type Option func(*Options)
-
 // Options server struct
 type Options struct {
 	// Context holds the external options and can be used for flow shutdown
@@ -31,7 +29,7 @@ type Options struct {
 }
 
 // NewOptions returns new options struct with default or passed values
-func NewOptions(opts ...Option) Options {
+func NewOptions(opts ...options.Option) Options {
 	options := Options{
 		Context: context.Background(),
 		Logger:  logger.DefaultLogger,
@@ -47,66 +45,12 @@ func NewOptions(opts ...Option) Options {
 	return options
 }
 
-// Logger sets the logger option
-func Logger(l logger.Logger) Option {
-	return func(o *Options) {
-		o.Logger = l
-	}
-}
-
-// Meter sets the meter option
-func Meter(m meter.Meter) Option {
-	return func(o *Options) {
-		o.Meter = m
-	}
-}
-
-// Client to use for sync/async communication
-func Client(c client.Client) Option {
-	return func(o *Options) {
-		o.Client = c
-	}
-}
-
-// Context specifies a context for the service.
-// Can be used to signal shutdown of the flow
-// or can be used for extra option values.
-func Context(ctx context.Context) Option {
-	return func(o *Options) {
-		o.Context = ctx
-	}
-}
-
-// Tracer mechanism for distributed tracking
-func Tracer(t tracer.Tracer) Option {
-	return func(o *Options) {
-		o.Tracer = t
-	}
-}
-
-// Store used for intermediate results
-func Store(s store.Store) Option {
-	return func(o *Options) {
-		o.Store = s
-	}
-}
-
-// WorkflowOption func signature
-type WorkflowOption func(*WorkflowOptions)
-
 // WorkflowOptions holds workflow options
 type WorkflowOptions struct {
 	Context context.Context
 	ID      string
 }
 
-// WorkflowID set workflow id
-func WorkflowID(id string) WorkflowOption {
-	return func(o *WorkflowOptions) {
-		o.ID = id
-	}
-}
-
 // ExecuteOptions holds execute options
 type ExecuteOptions struct {
 	// Client holds the client.Client
@@ -129,67 +73,22 @@ type ExecuteOptions struct {
 	Async bool
 }
 
-// ExecuteOption func signature
-type ExecuteOption func(*ExecuteOptions)
-
-// ExecuteClient pass client.Client to ExecuteOption
-func ExecuteClient(c client.Client) ExecuteOption {
-	return func(o *ExecuteOptions) {
-		o.Client = c
+// Reverse says that dag must be run in reverse order
+func Reverse(b bool) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, b, ".Reverse")
 	}
 }
 
-// ExecuteTracer pass tracer.Tracer to ExecuteOption
-func ExecuteTracer(t tracer.Tracer) ExecuteOption {
-	return func(o *ExecuteOptions) {
-		o.Tracer = t
-	}
-}
-
-// ExecuteLogger pass logger.Logger to ExecuteOption
-func ExecuteLogger(l logger.Logger) ExecuteOption {
-	return func(o *ExecuteOptions) {
-		o.Logger = l
-	}
-}
-
-// ExecuteMeter pass meter.Meter to ExecuteOption
-func ExecuteMeter(m meter.Meter) ExecuteOption {
-	return func(o *ExecuteOptions) {
-		o.Meter = m
-	}
-}
-
-// ExecuteContext pass context.Context ot ExecuteOption
-func ExecuteContext(ctx context.Context) ExecuteOption {
-	return func(o *ExecuteOptions) {
-		o.Context = ctx
-	}
-}
-
-// ExecuteReverse says that dag must be run in reverse order
-func ExecuteReverse(b bool) ExecuteOption {
-	return func(o *ExecuteOptions) {
-		o.Reverse = b
-	}
-}
-
-// ExecuteTimeout pass timeout time.Duration for execution
-func ExecuteTimeout(td time.Duration) ExecuteOption {
-	return func(o *ExecuteOptions) {
-		o.Timeout = td
-	}
-}
-
-// ExecuteAsync says that caller does not wait for execution complete
-func ExecuteAsync(b bool) ExecuteOption {
-	return func(o *ExecuteOptions) {
-		o.Async = b
+// Async says that caller does not wait for execution complete
+func Async(b bool) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, b, ".Async")
 	}
 }
 
 // NewExecuteOptions create new ExecuteOptions struct
-func NewExecuteOptions(opts ...ExecuteOption) ExecuteOptions {
+func NewExecuteOptions(opts ...options.Option) ExecuteOptions {
 	options := ExecuteOptions{
 		Client:  client.DefaultClient,
 		Logger:  logger.DefaultLogger,
@@ -211,11 +110,8 @@ type StepOptions struct {
 	Requires []string
 }
 
-// StepOption func signature
-type StepOption func(*StepOptions)
-
 // NewStepOptions create new StepOptions struct
-func NewStepOptions(opts ...StepOption) StepOptions {
+func NewStepOptions(opts ...options.Option) StepOptions {
 	options := StepOptions{
 		Context: context.Background(),
 	}
@@ -225,23 +121,23 @@ func NewStepOptions(opts ...StepOption) StepOptions {
 	return options
 }
 
-// StepID sets the step id for dag
-func StepID(id string) StepOption {
-	return func(o *StepOptions) {
-		o.ID = id
+// Requires specifies required steps
+func Requires(steps ...string) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, steps, ".Requires")
 	}
 }
 
-// StepRequires specifies required steps
-func StepRequires(steps ...string) StepOption {
-	return func(o *StepOptions) {
-		o.Requires = steps
+// Fallback set the step to run on error
+func Fallback(step string) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, step, ".Fallback")
 	}
 }
 
-// StepFallback set the step to run on error
-func StepFallback(step string) StepOption {
-	return func(o *StepOptions) {
-		o.Fallback = step
+// ID sets the step ID
+func StepID(id string) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, id, ".ID")
 	}
 }

fsm/default.go

@@ -0,0 +1,126 @@
+package fsm
+
+import (
+	"context"
+	"fmt"
+	"sync"
+)
+
+type state struct {
+	body interface{}
+	name string
+}
+
+var _ State = &state{}
+
+func (s *state) Name() string {
+	return s.name
+}
+
+func (s *state) Body() interface{} {
+	return s.body
+}
+
+// fsm is a finite state machine
+type fsm struct {
+	statesMap   map[string]StateFunc
+	current     string
+	statesOrder []string
+	opts        Options
+	mu          sync.Mutex
+}
+
+// NewFSM creates a new finite state machine having the specified initial state
+// with specified options
+func NewFSM(opts ...Option) *fsm {
+	return &fsm{
+		statesMap: map[string]StateFunc{},
+		opts:      NewOptions(opts...),
+	}
+}
+
+// Current returns the current state
+func (f *fsm) Current() string {
+	f.mu.Lock()
+	s := f.current
+	f.mu.Unlock()
+	return s
+}
+
+// Current returns the current state
+func (f *fsm) Reset() {
+	f.mu.Lock()
+	f.current = f.opts.Initial
+	f.mu.Unlock()
+}
+
+// State adds state to fsm
+func (f *fsm) State(state string, fn StateFunc) {
+	f.mu.Lock()
+	f.statesMap[state] = fn
+	f.statesOrder = append(f.statesOrder, state)
+	f.mu.Unlock()
+}
+
+// Start runs state machine with provided data
+func (f *fsm) Start(ctx context.Context, args interface{}, opts ...Option) (interface{}, error) {
+	var err error
+
+	f.mu.Lock()
+	options := f.opts
+
+	for _, opt := range opts {
+		opt(&options)
+	}
+
+	sopts := []StateOption{StateDryRun(options.DryRun)}
+
+	cstate := options.Initial
+	states := make(map[string]StateFunc, len(f.statesMap))
+	for k, v := range f.statesMap {
+		states[k] = v
+	}
+	f.current = cstate
+	f.mu.Unlock()
+
+	var s State
+	s = &state{name: cstate, body: args}
+	nstate := s.Name()
+
+	for {
+		select {
+		case <-ctx.Done():
+			return nil, ctx.Err()
+		default:
+			fn, ok := states[nstate]
+			if !ok {
+				return nil, fmt.Errorf(`state "%s" %w`, nstate, ErrInvalidState)
+			}
+			f.mu.Lock()
+			f.current = nstate
+			f.mu.Unlock()
+
+			// wrap the handler func
+			for i := len(options.Wrappers); i > 0; i-- {
+				fn = options.Wrappers[i-1](fn)
+			}
+
+			s, err = fn(ctx, s, sopts...)
+
+			switch {
+			case err != nil:
+				return s.Body(), err
+			case s.Name() == StateEnd:
+				return s.Body(), nil
+			case s.Name() == "":
+				for idx := range f.statesOrder {
+					if f.statesOrder[idx] == nstate && len(f.statesOrder) > idx+1 {
+						nstate = f.statesOrder[idx+1]
+					}
+				}
+			default:
+				nstate = s.Name()
+			}
+		}
+	}
+}

fsm/fsm.go

@@ -1,10 +1,8 @@
-package fsm // import "go.unistack.org/micro/v3/fsm"
+package fsm // import "go.unistack.org/micro/v4/fsm"
 
 import (
 	"context"
 	"errors"
-	"fmt"
-	"sync"
 )
 
 var (
@@ -12,170 +10,20 @@ var (
 	StateEnd        = "end"
 )
 
-// Options struct holding fsm options
-type Options struct {
-	// DryRun mode
-	DryRun bool
-	// Initial state
-	Initial string
-	// HooksBefore func slice runs in order before state
-	HooksBefore []HookBeforeFunc
-	// HooksAfter func slice runs in order after state
-	HooksAfter []HookAfterFunc
+type State interface {
+	Name() string
+	Body() interface{}
 }
 
-// HookBeforeFunc func signature
-type HookBeforeFunc func(ctx context.Context, state string, args interface{})
-
-// HookAfterFunc func signature
-type HookAfterFunc func(ctx context.Context, state string, args interface{})
-
-// Option func signature
-type Option func(*Options)
-
-// StateOptions holds state options
-type StateOptions struct {
-	DryRun bool
-}
-
-// StateDryRun says that state executes in dry run mode
-func StateDryRun(b bool) StateOption {
-	return func(o *StateOptions) {
-		o.DryRun = b
-	}
-}
-
-// StateOption func signature
-type StateOption func(*StateOptions)
-
-// InitialState sets init state for state machine
-func InitialState(initial string) Option {
-	return func(o *Options) {
-		o.Initial = initial
-	}
-}
-
-// HookBefore provides hook func slice
-func HookBefore(fns ...HookBeforeFunc) Option {
-	return func(o *Options) {
-		o.HooksBefore = fns
-	}
-}
-
-// HookAfter provides hook func slice
-func HookAfter(fns ...HookAfterFunc) Option {
-	return func(o *Options) {
-		o.HooksAfter = fns
-	}
-}
+// StateWrapper wraps the StateFunc and returns the equivalent
+type StateWrapper func(StateFunc) StateFunc
 
 // StateFunc called on state transition and return next step and error
-type StateFunc func(ctx context.Context, args interface{}, opts ...StateOption) (string, interface{}, error)
+type StateFunc func(ctx context.Context, state State, opts ...StateOption) (State, error)
 
-// FSM is a finite state machine
-type FSM struct {
-	mu          sync.Mutex
-	statesMap   map[string]StateFunc
-	statesOrder []string
-	opts        *Options
-	current     string
-}
-
-// New creates a new finite state machine having the specified initial state
-// with specified options
-func New(opts ...Option) *FSM {
-	options := &Options{}
-
-	for _, opt := range opts {
-		opt(options)
-	}
-
-	return &FSM{
-		statesMap: map[string]StateFunc{},
-		opts:      options,
-	}
-}
-
-// Current returns the current state
-func (f *FSM) Current() string {
-	f.mu.Lock()
-	defer f.mu.Unlock()
-	return f.current
-}
-
-// Current returns the current state
-func (f *FSM) Reset() {
-	f.mu.Lock()
-	f.current = f.opts.Initial
-	f.mu.Unlock()
-}
-
-// State adds state to fsm
-func (f *FSM) State(state string, fn StateFunc) {
-	f.mu.Lock()
-	f.statesMap[state] = fn
-	f.statesOrder = append(f.statesOrder, state)
-	f.mu.Unlock()
-}
-
-// Init initialize fsm and check states
-
-// Start runs state machine with provided data
-func (f *FSM) Start(ctx context.Context, args interface{}, opts ...Option) (interface{}, error) {
-	var err error
-	var ok bool
-	var fn StateFunc
-	var nstate string
-
-	f.mu.Lock()
-	options := f.opts
-
-	for _, opt := range opts {
-		opt(options)
-	}
-
-	sopts := []StateOption{StateDryRun(options.DryRun)}
-
-	cstate := options.Initial
-	states := make(map[string]StateFunc, len(f.statesMap))
-	for k, v := range f.statesMap {
-		states[k] = v
-	}
-	f.current = cstate
-	f.mu.Unlock()
-
-	for {
-		select {
-		case <-ctx.Done():
-			return nil, ctx.Err()
-		default:
-			fn, ok = states[cstate]
-			if !ok {
-				return nil, fmt.Errorf(`state "%s" %w`, cstate, ErrInvalidState)
-			}
-			f.mu.Lock()
-			f.current = cstate
-			f.mu.Unlock()
-			for _, fn := range options.HooksBefore {
-				fn(ctx, cstate, args)
-			}
-			nstate, args, err = fn(ctx, args, sopts...)
-			for _, fn := range options.HooksAfter {
-				fn(ctx, cstate, args)
-			}
-			switch {
-			case err != nil:
-				return args, err
-			case nstate == StateEnd:
-				return args, nil
-			case nstate == "":
-				for idx := range f.statesOrder {
-					if f.statesOrder[idx] == cstate && len(f.statesOrder) > idx+1 {
-						nstate = f.statesOrder[idx+1]
-					}
-				}
-			}
-			cstate = nstate
-		}
-	}
+type FSM interface {
+	Start(context.Context, interface{}, ...Option) (interface{}, error)
+	Current() string
+	Reset()
+	State(string, StateFunc)
 }

fsm/fsm_test.go

@@ -1,63 +1,72 @@
 package fsm
 
 import (
-	"bytes"
 	"context"
 	"fmt"
 	"testing"
+
+	"go.unistack.org/micro/v4/logger"
 )
 
 func TestFSMStart(t *testing.T) {
 	ctx := context.TODO()
-	buf := bytes.NewBuffer(nil)
-	pfb := func(_ context.Context, state string, _ interface{}) {
-		fmt.Fprintf(buf, "before state %s\n", state)
+
+	if err := logger.DefaultLogger.Init(); err != nil {
+		t.Fatal(err)
 	}
-	pfa := func(_ context.Context, state string, _ interface{}) {
-		fmt.Fprintf(buf, "after state %s\n", state)
+
+	wrapper := func(next StateFunc) StateFunc {
+		return func(sctx context.Context, s State, opts ...StateOption) (State, error) {
+			sctx = logger.NewContext(sctx, logger.Attrs("state", s.Name()))
+			return next(sctx, s, opts...)
 		}
-	f := New(InitialState("1"), HookBefore(pfb), HookAfter(pfa))
-	f1 := func(_ context.Context, req interface{}, _ ...StateOption) (string, interface{}, error) {
-		args := req.(map[string]interface{})
+	}
+
+	f := NewFSM(InitialState("1"), WrapState(wrapper))
+	f1 := func(sctx context.Context, s State, opts ...StateOption) (State, error) {
+		_, ok := logger.FromContext(sctx)
+		if !ok {
+			t.Fatal("f1 context does not have logger")
+		}
+		args := s.Body().(map[string]interface{})
 		if v, ok := args["request"].(string); !ok || v == "" {
-			return "", nil, fmt.Errorf("empty request")
+			return nil, fmt.Errorf("empty request")
 		}
-		return "2", map[string]interface{}{"response": "test2"}, nil
+		return &state{name: "", body: map[string]interface{}{"response": "state1"}}, nil
 	}
-	f2 := func(_ context.Context, req interface{}, _ ...StateOption) (string, interface{}, error) {
-		args := req.(map[string]interface{})
+	f2 := func(sctx context.Context, s State, opts ...StateOption) (State, error) {
+		_, ok := logger.FromContext(sctx)
+		if !ok {
+			t.Fatal("f2 context does not have logger")
+		}
+		args := s.Body().(map[string]interface{})
 		if v, ok := args["response"].(string); !ok || v == "" {
-			return "", nil, fmt.Errorf("empty response")
+			return nil, fmt.Errorf("empty response")
 		}
-		return "", map[string]interface{}{"response": "test"}, nil
+		return &state{name: "", body: map[string]interface{}{"response": "state2"}}, nil
 	}
-	f3 := func(_ context.Context, req interface{}, _ ...StateOption) (string, interface{}, error) {
-		args := req.(map[string]interface{})
+	f3 := func(sctx context.Context, s State, opts ...StateOption) (State, error) {
+		_, ok := logger.FromContext(sctx)
+		if !ok {
+			t.Fatal("f3 context does not have logger")
+		}
+		args := s.Body().(map[string]interface{})
 		if v, ok := args["response"].(string); !ok || v == "" {
-			return "", nil, fmt.Errorf("empty response")
+			return nil, fmt.Errorf("empty response")
 		}
-		return StateEnd, map[string]interface{}{"response": "test_last"}, nil
+		return &state{name: StateEnd, body: map[string]interface{}{"response": "state3"}}, nil
 	}
 	f.State("1", f1)
 	f.State("2", f2)
 	f.State("3", f3)
-	rsp, err := f.Start(ctx, map[string]interface{}{"request": "test1"})
+	rsp, err := f.Start(ctx, map[string]interface{}{"request": "state"})
 	if err != nil {
 		t.Fatal(err)
 	}
 	args := rsp.(map[string]interface{})
 	if v, ok := args["response"].(string); !ok || v == "" {
 		t.Fatalf("nil rsp: %#+v", args)
-	} else if v != "test_last" {
+	} else if v != "state3" {
 		t.Fatalf("invalid rsp %#+v", args)
 	}
-
-	if !bytes.Contains(buf.Bytes(), []byte(`before state 1`)) ||
-		!bytes.Contains(buf.Bytes(), []byte(`before state 2`)) ||
-		!bytes.Contains(buf.Bytes(), []byte(`after state 1`)) ||
-		!bytes.Contains(buf.Bytes(), []byte(`after state 2`)) ||
-		!bytes.Contains(buf.Bytes(), []byte(`after state 3`)) ||
-		!bytes.Contains(buf.Bytes(), []byte(`after state 3`)) {
-		t.Fatalf("fsm not works properly or hooks error, buf: %s", buf.Bytes())
-	}
 }

fsm/options.go

@@ -0,0 +1,52 @@
+package fsm
+
+// Options struct holding fsm options
+type Options struct {
+	// Initial state
+	Initial string
+	// Wrappers runs before state
+	Wrappers []StateWrapper
+	// DryRun mode
+	DryRun bool
+}
+
+// Option func signature
+type Option func(*Options)
+
+// StateOptions holds state options
+type StateOptions struct {
+	DryRun bool
+}
+
+// StateDryRun says that state executes in dry run mode
+func StateDryRun(b bool) StateOption {
+	return func(o *StateOptions) {
+		o.DryRun = b
+	}
+}
+
+// StateOption func signature
+type StateOption func(*StateOptions)
+
+// InitialState sets init state for state machine
+func InitialState(initial string) Option {
+	return func(o *Options) {
+		o.Initial = initial
+	}
+}
+
+// WrapState adds a state Wrapper to a list of options passed into the fsm
+func WrapState(w StateWrapper) Option {
+	return func(o *Options) {
+		o.Wrappers = append(o.Wrappers, w)
+	}
+}
+
+// NewOptions returns new Options struct filled by passed Option
+func NewOptions(opts ...Option) Options {
+	options := Options{}
+	for _, o := range opts {
+		o(&options)
+	}
+	return options
+}

go.mod

@@ -1,13 +1,20 @@
-module go.unistack.org/micro/v3
+module go.unistack.org/micro/v4
 
-go 1.16
+go 1.20
 
 require (
-	github.com/google/go-cmp v0.5.7 // indirect
-	github.com/imdario/mergo v0.3.13
-	github.com/kr/pretty v0.2.1 // indirect
-	github.com/kr/text v0.2.0 // indirect
+	dario.cat/mergo v1.0.0
+	github.com/DATA-DOG/go-sqlmock v1.5.0
+	github.com/google/uuid v1.6.0
 	github.com/patrickmn/go-cache v2.1.0+incompatible
-	github.com/silas/dag v0.0.0-20211117232152-9d50aa809f35
-	go.unistack.org/micro-proto/v3 v3.3.1
+	github.com/silas/dag v0.0.0-20220518035006-a7e85ada93c5
+	golang.org/x/sync v0.6.0
+	golang.org/x/sys v0.16.0
+	google.golang.org/grpc v1.62.1
+	google.golang.org/protobuf v1.32.0
+)
+
+require (
+	github.com/golang/protobuf v1.5.3 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20240123012728-ef4313101c80 // indirect
 )

go.sum

@@ -1,160 +1,33 @@
-cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
-github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
-github.com/buger/jsonparser v1.1.1/go.mod h1:6RYKKt7H4d4+iWqouImQ9R2FZql3VbhNgx27UK13J/0=
-github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
-github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
-github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
-github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
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-github.com/cncf/xds/go v0.0.0-20210312221358-fbca930ec8ed/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
-github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
-github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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logger/context.go

@@ -20,13 +20,3 @@ func NewContext(ctx context.Context, l Logger) context.Context {
 	}
 	return context.WithValue(ctx, loggerKey{}, l)
 }
-
-// SetOption returns a function to setup a context with given value
-func SetOption(k, v interface{}) Option {
-	return func(o *Options) {
-		if o.Context == nil {
-			o.Context = context.Background()
-		}
-		o.Context = context.WithValue(o.Context, k, v)
-	}
-}

logger/context_test.go

@@ -40,14 +40,3 @@ func TestNewContext(t *testing.T) {
 		t.Fatal("NewContext not works")
 	}
 }
-
-func TestSetOption(t *testing.T) {
-	type key struct{}
-	o := SetOption(key{}, "test")
-	opts := &Options{}
-	o(opts)
-
-	if v, ok := opts.Context.Value(key{}).(string); !ok || v == "" {
-		t.Fatal("SetOption not works")
-	}
-}

logger/default.go

@@ -1,243 +0,0 @@
-package logger
-
-import (
-	"context"
-	"encoding/json"
-	"fmt"
-	"os"
-	"runtime"
-	"strings"
-	"sync"
-	"time"
-)
-
-type defaultLogger struct {
-	enc      *json.Encoder
-	logFunc  LogFunc
-	logfFunc LogfFunc
-	opts     Options
-	sync.RWMutex
-}
-
-// Init(opts...) should only overwrite provided options
-func (l *defaultLogger) Init(opts ...Option) error {
-	l.Lock()
-	for _, o := range opts {
-		o(&l.opts)
-	}
-	l.enc = json.NewEncoder(l.opts.Out)
-	// wrap the Log func
-	for i := len(l.opts.Wrappers); i > 0; i-- {
-		l.logFunc = l.opts.Wrappers[i-1].Log(l.logFunc)
-		l.logfFunc = l.opts.Wrappers[i-1].Logf(l.logfFunc)
-	}
-	l.Unlock()
-	return nil
-}
-
-func (l *defaultLogger) String() string {
-	return "micro"
-}
-
-func (l *defaultLogger) Clone(opts ...Option) Logger {
-	newopts := NewOptions(opts...)
-	oldopts := l.opts
-	for _, o := range opts {
-		o(&newopts)
-		o(&oldopts)
-	}
-
-	oldopts.Wrappers = newopts.Wrappers
-	l.Lock()
-	cl := &defaultLogger{opts: oldopts, logFunc: l.logFunc, logfFunc: l.logfFunc}
-	l.Unlock()
-
-	// wrap the Log func
-	for i := len(newopts.Wrappers); i > 0; i-- {
-		cl.logFunc = newopts.Wrappers[i-1].Log(cl.logFunc)
-		cl.logfFunc = newopts.Wrappers[i-1].Logf(cl.logfFunc)
-	}
-
-	return cl
-}
-
-func (l *defaultLogger) V(level Level) bool {
-	l.RLock()
-	ok := l.opts.Level.Enabled(level)
-	l.RUnlock()
-	return ok
-}
-
-func (l *defaultLogger) Level(level Level) {
-	l.Lock()
-	l.opts.Level = level
-	l.Unlock()
-}
-
-func (l *defaultLogger) Fields(fields ...interface{}) Logger {
-	nl := &defaultLogger{opts: l.opts, enc: l.enc}
-	if len(fields) == 0 {
-		return nl
-	} else if len(fields)%2 != 0 {
-		fields = fields[:len(fields)-1]
-	}
-	nl.logFunc = l.logFunc
-	nl.logfFunc = l.logfFunc
-	nl.opts.Fields = append(nl.opts.Fields, fields...)
-	return nl
-}
-
-func copyFields(src []interface{}) []interface{} {
-	dst := make([]interface{}, len(src))
-	copy(dst, src)
-	return dst
-}
-
-// logCallerfilePath returns a package/file:line description of the caller,
-// preserving only the leaf directory name and file name.
-func logCallerfilePath(loggingFilePath string) string {
-	// To make sure we trim the path correctly on Windows too, we
-	// counter-intuitively need to use '/' and *not* os.PathSeparator here,
-	// because the path given originates from Go stdlib, specifically
-	// runtime.Caller() which (as of Mar/17) returns forward slashes even on
-	// Windows.
-	//
-	// See https://github.com/golang/go/issues/3335
-	// and https://github.com/golang/go/issues/18151
-	//
-	// for discussion on the issue on Go side.
-	idx := strings.LastIndexByte(loggingFilePath, '/')
-	if idx == -1 {
-		return loggingFilePath
-	}
-	idx = strings.LastIndexByte(loggingFilePath[:idx], '/')
-	if idx == -1 {
-		return loggingFilePath
-	}
-	return loggingFilePath[idx+1:]
-}
-
-func (l *defaultLogger) Info(ctx context.Context, args ...interface{}) {
-	l.Log(ctx, InfoLevel, args...)
-}
-
-func (l *defaultLogger) Error(ctx context.Context, args ...interface{}) {
-	l.Log(ctx, ErrorLevel, args...)
-}
-
-func (l *defaultLogger) Debug(ctx context.Context, args ...interface{}) {
-	l.Log(ctx, DebugLevel, args...)
-}
-
-func (l *defaultLogger) Warn(ctx context.Context, args ...interface{}) {
-	l.Log(ctx, WarnLevel, args...)
-}
-
-func (l *defaultLogger) Trace(ctx context.Context, args ...interface{}) {
-	l.Log(ctx, TraceLevel, args...)
-}
-
-func (l *defaultLogger) Fatal(ctx context.Context, args ...interface{}) {
-	l.Log(ctx, FatalLevel, args...)
-	os.Exit(1)
-}
-
-func (l *defaultLogger) Infof(ctx context.Context, msg string, args ...interface{}) {
-	l.logfFunc(ctx, InfoLevel, msg, args...)
-}
-
-func (l *defaultLogger) Errorf(ctx context.Context, msg string, args ...interface{}) {
-	l.logfFunc(ctx, ErrorLevel, msg, args...)
-}
-
-func (l *defaultLogger) Debugf(ctx context.Context, msg string, args ...interface{}) {
-	l.logfFunc(ctx, DebugLevel, msg, args...)
-}
-
-func (l *defaultLogger) Warnf(ctx context.Context, msg string, args ...interface{}) {
-	l.logfFunc(ctx, WarnLevel, msg, args...)
-}
-
-func (l *defaultLogger) Tracef(ctx context.Context, msg string, args ...interface{}) {
-	l.logfFunc(ctx, TraceLevel, msg, args...)
-}
-
-func (l *defaultLogger) Fatalf(ctx context.Context, msg string, args ...interface{}) {
-	l.logfFunc(ctx, FatalLevel, msg, args...)
-	os.Exit(1)
-}
-
-func (l *defaultLogger) Log(ctx context.Context, level Level, args ...interface{}) {
-	if !l.V(level) {
-		return
-	}
-
-	l.RLock()
-	fields := copyFields(l.opts.Fields)
-	l.RUnlock()
-
-	fields = append(fields, "level", level.String())
-
-	if _, file, line, ok := runtime.Caller(l.opts.CallerSkipCount); ok {
-		fields = append(fields, "caller", fmt.Sprintf("%s:%d", logCallerfilePath(file), line))
-	}
-	fields = append(fields, "timestamp", time.Now().Format("2006-01-02 15:04:05"))
-
-	if len(args) > 0 {
-		fields = append(fields, "msg", fmt.Sprint(args...))
-	}
-
-	out := make(map[string]interface{}, len(fields)/2)
-	for i := 0; i < len(fields); i += 2 {
-		out[fields[i].(string)] = fields[i+1]
-	}
-	l.RLock()
-	_ = l.enc.Encode(out)
-	l.RUnlock()
-}
-
-func (l *defaultLogger) Logf(ctx context.Context, level Level, msg string, args ...interface{}) {
-	if !l.V(level) {
-		return
-	}
-
-	l.RLock()
-	fields := copyFields(l.opts.Fields)
-	l.RUnlock()
-
-	fields = append(fields, "level", level.String())
-
-	if _, file, line, ok := runtime.Caller(l.opts.CallerSkipCount); ok {
-		fields = append(fields, "caller", fmt.Sprintf("%s:%d", logCallerfilePath(file), line))
-	}
-
-	fields = append(fields, "timestamp", time.Now().Format("2006-01-02 15:04:05"))
-	if len(args) > 0 {
-		fields = append(fields, "msg", fmt.Sprintf(msg, args...))
-	} else if msg != "" {
-		fields = append(fields, "msg", msg)
-	}
-
-	out := make(map[string]interface{}, len(fields)/2)
-	for i := 0; i < len(fields); i += 2 {
-		out[fields[i].(string)] = fields[i+1]
-	}
-	l.RLock()
-	_ = l.enc.Encode(out)
-	l.RUnlock()
-}
-
-func (l *defaultLogger) Options() Options {
-	return l.opts
-}
-
-// NewLogger builds a new logger based on options
-func NewLogger(opts ...Option) Logger {
-	l := &defaultLogger{
-		opts: NewOptions(opts...),
-	}
-	l.logFunc = l.Log
-	l.logfFunc = l.Logf
-	l.enc = json.NewEncoder(l.opts.Out)
-	return l
-}

logger/logger.go

@@ -1,14 +1,19 @@
 // Package logger provides a log interface
-package logger // import "go.unistack.org/micro/v3/logger"
+package logger
 
 import (
 	"context"
-	"os"
+
+	"go.unistack.org/micro/v4/options"
 )
 
+type ContextAttrFunc func(ctx context.Context) []interface{}
+
+var DefaultContextAttrFuncs []ContextAttrFunc
+
 var (
 	// DefaultLogger variable
-	DefaultLogger = NewLogger(WithLevel(ParseLevel(os.Getenv("MICRO_LOG_LEVEL"))))
+	DefaultLogger = NewLogger()
 	// DefaultLevel used by logger
 	DefaultLevel = InfoLevel
 	// DefaultCallerSkipCount used by logger
@@ -18,110 +23,65 @@ var (
 // Logger is a generic logging interface
 type Logger interface {
 	// Init initialises options
-	Init(opts ...Option) error
+	Init(opts ...options.Option) error
 	// Clone create logger copy with new options
-	Clone(opts ...Option) Logger
+	Clone(opts ...options.Option) Logger
 	// V compare provided verbosity level with current log level
 	V(level Level) bool
 	// Level sets the log level for logger
 	Level(level Level)
 	// The Logger options
 	Options() Options
-	// Fields set fields to always be logged with keyval pairs
-	Fields(fields ...interface{}) Logger
+	// Attrs set attrs to always be logged with keyval pairs
+	Attrs(attrs ...interface{}) Logger
 	// Info level message
-	Info(ctx context.Context, args ...interface{})
-	// Trace level message
-	Trace(ctx context.Context, args ...interface{})
-	// Debug level message
-	Debug(ctx context.Context, args ...interface{})
-	// Warn level message
-	Warn(ctx context.Context, args ...interface{})
-	// Error level message
-	Error(ctx context.Context, args ...interface{})
-	// Fatal level message
-	Fatal(ctx context.Context, args ...interface{})
-	// Infof level message
-	Infof(ctx context.Context, msg string, args ...interface{})
+	Info(ctx context.Context, msg string, attrs ...interface{})
 	// Tracef level message
-	Tracef(ctx context.Context, msg string, args ...interface{})
+	Trace(ctx context.Context, msg string, attrs ...interface{})
 	// Debug level message
-	Debugf(ctx context.Context, msg string, args ...interface{})
+	Debug(ctx context.Context, msg string, attrs ...interface{})
 	// Warn level message
-	Warnf(ctx context.Context, msg string, args ...interface{})
+	Warn(ctx context.Context, msg string, attrs ...interface{})
 	// Error level message
-	Errorf(ctx context.Context, msg string, args ...interface{})
+	Error(ctx context.Context, msg string, attrs ...interface{})
 	// Fatal level message
-	Fatalf(ctx context.Context, msg string, args ...interface{})
+	Fatal(ctx context.Context, msg string, attrs ...interface{})
 	// Log logs message with needed level
-	Log(ctx context.Context, level Level, args ...interface{})
-	// Logf logs message with needed level
-	Logf(ctx context.Context, level Level, msg string, args ...interface{})
-	// String returns the name of logger
+	Log(ctx context.Context, level Level, msg string, attrs ...interface{})
+	// String returns the type name of logger
 	String() string
+	// String returns the name of logger
+	Name() string
 }
 
-// Field contains keyval pair
-type Field interface{}
-
-// Info writes msg to default logger on info level
-func Info(ctx context.Context, args ...interface{}) {
-	DefaultLogger.Info(ctx, args...)
+// Info writes formatted msg to default logger on info level
+func Info(ctx context.Context, msg string, attrs ...interface{}) {
+	DefaultLogger.Info(ctx, msg, attrs...)
 }
 
-// Error writes msg to default logger on error level
-func Error(ctx context.Context, args ...interface{}) {
-	DefaultLogger.Error(ctx, args...)
+// Error writes formatted msg to default logger on error level
+func Error(ctx context.Context, msg string, attrs ...interface{}) {
+	DefaultLogger.Error(ctx, msg, attrs...)
 }
 
-// Debug writes msg to default logger on debug level
-func Debug(ctx context.Context, args ...interface{}) {
-	DefaultLogger.Debug(ctx, args...)
+// Debug writes formatted msg to default logger on debug level
+func Debug(ctx context.Context, msg string, attrs ...interface{}) {
+	DefaultLogger.Debug(ctx, msg, attrs...)
 }
 
-// Warn writes msg to default logger on warn level
-func Warn(ctx context.Context, args ...interface{}) {
-	DefaultLogger.Warn(ctx, args...)
+// Warn writes formatted msg to default logger on warn level
+func Warn(ctx context.Context, msg string, attrs ...interface{}) {
+	DefaultLogger.Warn(ctx, msg, attrs...)
 }
 
-// Trace writes msg to default logger on trace level
-func Trace(ctx context.Context, args ...interface{}) {
-	DefaultLogger.Trace(ctx, args...)
+// Trace writes formatted msg to default logger on trace level
+func Trace(ctx context.Context, msg string, attrs ...interface{}) {
+	DefaultLogger.Trace(ctx, msg, attrs...)
 }
 
-// Fatal writes msg to default logger on fatal level
-func Fatal(ctx context.Context, args ...interface{}) {
-	DefaultLogger.Fatal(ctx, args...)
-}
-
-// Infof writes formatted msg to default logger on info level
-func Infof(ctx context.Context, msg string, args ...interface{}) {
-	DefaultLogger.Infof(ctx, msg, args...)
-}
-
-// Errorf writes formatted msg to default logger on error level
-func Errorf(ctx context.Context, msg string, args ...interface{}) {
-	DefaultLogger.Errorf(ctx, msg, args...)
-}
-
-// Debugf writes formatted msg to default logger on debug level
-func Debugf(ctx context.Context, msg string, args ...interface{}) {
-	DefaultLogger.Debugf(ctx, msg, args...)
-}
-
-// Warnf writes formatted msg to default logger on warn level
-func Warnf(ctx context.Context, msg string, args ...interface{}) {
-	DefaultLogger.Warnf(ctx, msg, args...)
-}
-
-// Tracef writes formatted msg to default logger on trace level
-func Tracef(ctx context.Context, msg string, args ...interface{}) {
-	DefaultLogger.Tracef(ctx, msg, args...)
-}
-
-// Fatalf writes formatted msg to default logger on fatal level
-func Fatalf(ctx context.Context, msg string, args ...interface{}) {
-	DefaultLogger.Fatalf(ctx, msg, args...)
+// Fatal writes formatted msg to default logger on fatal level
+func Fatal(ctx context.Context, msg string, attrs ...interface{}) {
+	DefaultLogger.Fatal(ctx, msg, attrs...)
 }
 
 // V returns true if passed level enabled in default logger
@@ -129,12 +89,12 @@ func V(level Level) bool {
 	return DefaultLogger.V(level)
 }
 
-// Init initialize logger
-func Init(opts ...Option) error {
+// Init initialize default logger
+func Init(opts ...options.Option) error {
 	return DefaultLogger.Init(opts...)
 }
 
-// Fields create logger with specific fields
-func Fields(fields ...interface{}) Logger {
-	return DefaultLogger.Fields(fields...)
+// Attrs create default logger with specific attrs
+func Attrs(attrs ...interface{}) Logger {
+	return DefaultLogger.Attrs(attrs...)
 }

logger/logger_test.go

@@ -1,148 +0,0 @@
-package logger
-
-import (
-	"bytes"
-	"context"
-	"log"
-	"testing"
-)
-
-func TestContext(t *testing.T) {
-	ctx := context.TODO()
-	buf := bytes.NewBuffer(nil)
-	l := NewLogger(WithLevel(TraceLevel), WithOutput(buf))
-	if err := l.Init(); err != nil {
-		t.Fatal(err)
-	}
-
-	nl, ok := FromContext(NewContext(ctx, l.Fields("key", "val")))
-	if !ok {
-		t.Fatal("context without logger")
-	}
-	nl.Info(ctx, "message")
-	if !bytes.Contains(buf.Bytes(), []byte(`"key":"val"`)) {
-		t.Fatalf("logger fields not works, buf contains: %s", buf.Bytes())
-	}
-}
-
-func TestFields(t *testing.T) {
-	ctx := context.TODO()
-	buf := bytes.NewBuffer(nil)
-	l := NewLogger(WithLevel(TraceLevel), WithOutput(buf))
-	if err := l.Init(); err != nil {
-		t.Fatal(err)
-	}
-	l.Fields("key", "val").Info(ctx, "message")
-	if !bytes.Contains(buf.Bytes(), []byte(`"key":"val"`)) {
-		t.Fatalf("logger fields not works, buf contains: %s", buf.Bytes())
-	}
-}
-
-func TestClone(t *testing.T) {
-	ctx := context.TODO()
-	buf := bytes.NewBuffer(nil)
-	l := NewLogger(WithLevel(TraceLevel), WithOutput(buf))
-	if err := l.Init(); err != nil {
-		t.Fatal(err)
-	}
-	nl := l.Clone(WithLevel(ErrorLevel))
-	if err := nl.Init(); err != nil {
-		t.Fatal(err)
-	}
-	nl.Info(ctx, "info message")
-	if len(buf.Bytes()) != 0 {
-		t.Fatal("message must not be logged")
-	}
-	l.Info(ctx, "info message")
-	if len(buf.Bytes()) == 0 {
-		t.Fatal("message must be logged")
-	}
-}
-
-func TestRedirectStdLogger(t *testing.T) {
-	buf := bytes.NewBuffer(nil)
-	l := NewLogger(WithLevel(TraceLevel), WithOutput(buf))
-	if err := l.Init(); err != nil {
-		t.Fatal(err)
-	}
-	fn := RedirectStdLogger(l, ErrorLevel)
-	defer fn()
-	log.Print("test")
-	if !bytes.Contains(buf.Bytes(), []byte(`"level":"error","msg":"test","timestamp"`)) {
-		t.Fatalf("logger error, buf %s", buf.Bytes())
-	}
-}
-
-func TestStdLogger(t *testing.T) {
-	buf := bytes.NewBuffer(nil)
-	l := NewLogger(WithLevel(TraceLevel), WithOutput(buf))
-	if err := l.Init(); err != nil {
-		t.Fatal(err)
-	}
-	lg := NewStdLogger(l, ErrorLevel)
-	lg.Print("test")
-	if !bytes.Contains(buf.Bytes(), []byte(`"level":"error","msg":"test","timestamp"`)) {
-		t.Fatalf("logger error, buf %s", buf.Bytes())
-	}
-}
-
-func TestLogger(t *testing.T) {
-	ctx := context.TODO()
-	buf := bytes.NewBuffer(nil)
-	l := NewLogger(WithLevel(TraceLevel), WithOutput(buf))
-	if err := l.Init(); err != nil {
-		t.Fatal(err)
-	}
-	l.Trace(ctx, "trace_msg1")
-	l.Warn(ctx, "warn_msg1")
-	l.Fields("error", "test").Info(ctx, "error message")
-	l.Warn(ctx, "first", " ", "second")
-	if !bytes.Contains(buf.Bytes(), []byte(`"level":"trace","msg":"trace_msg1"`)) {
-		t.Fatalf("logger error, buf %s", buf.Bytes())
-	}
-	if !bytes.Contains(buf.Bytes(), []byte(`"warn","msg":"warn_msg1"`)) {
-		t.Fatalf("logger error, buf %s", buf.Bytes())
-	}
-	if !bytes.Contains(buf.Bytes(), []byte(`"error":"test","level":"info","msg":"error message"`)) {
-		t.Fatalf("logger error, buf %s", buf.Bytes())
-	}
-	if !bytes.Contains(buf.Bytes(), []byte(`"level":"warn","msg":"first second"`)) {
-		t.Fatalf("logger error, buf %s", buf.Bytes())
-	}
-}
-
-func TestLoggerWrapper(t *testing.T) {
-	ctx := context.TODO()
-	buf := bytes.NewBuffer(nil)
-	l := NewLogger(WithLevel(TraceLevel), WithOutput(buf))
-	if err := l.Init(WrapLogger(NewOmitWrapper())); err != nil {
-		t.Fatal(err)
-	}
-	type secret struct {
-		Name  string
-		Passw string `logger:"omit"`
-	}
-	s := &secret{Name: "name", Passw: "secret"}
-	l.Errorf(ctx, "test %#+v", s)
-	if !bytes.Contains(buf.Bytes(), []byte(`logger.secret{Name:\"name\", Passw:\"\"}"`)) {
-		t.Fatalf("omit not works, struct: %v, output: %s", s, buf.Bytes())
-	}
-}
-
-func TestOmitLoggerWrapper(t *testing.T) {
-	ctx := context.TODO()
-	buf := bytes.NewBuffer(nil)
-	l := NewOmitLogger(NewLogger(WithLevel(TraceLevel), WithOutput(buf)))
-	if err := l.Init(); err != nil {
-		t.Fatal(err)
-	}
-	type secret struct {
-		Name  string
-		Passw string `logger:"omit"`
-	}
-	s := &secret{Name: "name", Passw: "secret"}
-	l.Errorf(ctx, "test %#+v", s)
-	if !bytes.Contains(buf.Bytes(), []byte(`logger.secret{Name:\"name\", Passw:\"\"}"`)) {
-		t.Fatalf("omit not works, struct: %v, output: %s", s, buf.Bytes())
-	}
-}

logger/noop.go

@@ -0,0 +1,75 @@
+package logger
+
+import (
+	"context"
+
+	"go.unistack.org/micro/v4/options"
+)
+
+type noopLogger struct {
+	opts Options
+}
+
+func NewLogger(opts ...options.Option) Logger {
+	options := NewOptions(opts...)
+	return &noopLogger{opts: options}
+}
+
+func (l *noopLogger) V(lvl Level) bool {
+	return false
+}
+
+func (l *noopLogger) Level(lvl Level) {
+}
+
+func (l *noopLogger) Init(opts ...options.Option) error {
+	for _, o := range opts {
+		o(&l.opts)
+	}
+	return nil
+}
+
+func (l *noopLogger) Clone(opts ...options.Option) Logger {
+	nl := &noopLogger{opts: l.opts}
+	for _, o := range opts {
+		o(&nl.opts)
+	}
+	return nl
+}
+
+func (l *noopLogger) Attrs(attrs ...interface{}) Logger {
+	return l
+}
+
+func (l *noopLogger) Options() Options {
+	return l.opts
+}
+
+func (l *noopLogger) Name() string {
+	return l.opts.Name
+}
+
+func (l *noopLogger) String() string {
+	return "noop"
+}
+
+func (l *noopLogger) Log(ctx context.Context, lvl Level, msg string, attrs ...interface{}) {
+}
+
+func (l *noopLogger) Info(ctx context.Context, msg string, attrs ...interface{}) {
+}
+
+func (l *noopLogger) Debug(ctx context.Context, msg string, attrs ...interface{}) {
+}
+
+func (l *noopLogger) Error(ctx context.Context, msg string, attrs ...interface{}) {
+}
+
+func (l *noopLogger) Trace(ctx context.Context, msg string, attrs ...interface{}) {
+}
+
+func (l *noopLogger) Warn(ctx context.Context, msg string, attrs ...interface{}) {
+}
+
+func (l *noopLogger) Fatal(ctx context.Context, msg string, attrs ...interface{}) {
+}

logger/options.go

@@ -3,11 +3,14 @@ package logger
 import (
 	"context"
 	"io"
+	"log/slog"
 	"os"
-)
+	"reflect"
+	"time"
 
-// Option func
-type Option func(*Options)
+	"go.unistack.org/micro/v4/options"
+	rutil "go.unistack.org/micro/v4/util/reflect"
+)
 
 // Options holds logger options
 type Options struct {
@@ -15,78 +18,226 @@ type Options struct {
 	Out io.Writer
 	// Context holds exernal options
 	Context context.Context
-	// Fields holds additional metadata
-	Fields []interface{}
+	// TimeFunc used to obtain current time
+	TimeFunc func() time.Time
+	// TimeKey is the key used for the time of the log call
+	TimeKey string
 	// Name holds the logger name
 	Name string
-	// Wrappers logger wrapper that called before actual Log/Logf function
-	Wrappers []Wrapper
-	// The logging level the logger should log
-	Level Level
+	// LevelKey is the key used for the level of the log call
+	LevelKey string
+	// MessageKey is the key used for the message of the log call
+	MessageKey string
+	// ErrorKey is the key used for the error info
+	ErrorKey string
+	// SourceKey is the key used for the source file and line of the log call
+	SourceKey string
+	// StacktraceKey is the key used for the stacktrace
+	StacktraceKey string
+	// Attrs holds additional attributes
+	Attrs []interface{}
+	// ContextAttrFuncs contains funcs that executed before log func on context
+	ContextAttrFuncs []ContextAttrFunc
 	// CallerSkipCount number of frmaes to skip
 	CallerSkipCount int
+	// The logging level the logger should log
+	Level Level
+	// AddStacktrace controls writing of stacktaces on error
+	AddStacktrace bool
+	// AddSource enabled writing source file and position in log
+	AddSource bool
 }
 
 // NewOptions creates new options struct
-func NewOptions(opts ...Option) Options {
+func NewOptions(opts ...options.Option) Options {
 	options := Options{
 		Level:            DefaultLevel,
-		Fields:          make([]interface{}, 0, 6),
+		Attrs:            make([]interface{}, 0, 6),
 		Out:              os.Stderr,
 		CallerSkipCount:  DefaultCallerSkipCount,
 		Context:          context.Background(),
+		ContextAttrFuncs: DefaultContextAttrFuncs,
+		AddSource:        true,
+		TimeFunc:         time.Now,
 	}
+
+	_ = WithMicroKeys()(&options)
+
 	for _, o := range opts {
-		o(&options)
+		_ = o(&options)
 	}
 	return options
 }
 
-// WithFields set default fields for the logger
-func WithFields(fields ...interface{}) Option {
-	return func(o *Options) {
-		o.Fields = fields
+// WithContextAttrFuncs appends default funcs for the context arrts filler
+func WithContextAttrFuncs(fncs ...ContextAttrFunc) options.Option {
+	return func(src interface{}) error {
+		v, err := options.Get(src, ".ContextAttrFuncs")
+		if err != nil {
+			return err
+		} else if rutil.IsZero(v) {
+			v = reflect.MakeSlice(reflect.TypeOf(v), 0, len(fncs)).Interface()
+		}
+		cv := reflect.ValueOf(v)
+		for _, l := range fncs {
+			cv = reflect.Append(cv, reflect.ValueOf(l))
+		}
+		return options.Set(src, cv.Interface(), ".ContextAttrFuncs")
+	}
+}
+
+// WithAttrs set default fields for the logger
+func WithAttrs(attrs ...interface{}) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, attrs, ".Attrs")
 	}
 }
 
 // WithLevel set default level for the logger
-func WithLevel(level Level) Option {
-	return func(o *Options) {
-		o.Level = level
+func WithLevel(lvl Level) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, lvl, ".Level")
 	}
 }
 
 // WithOutput set default output writer for the logger
-func WithOutput(out io.Writer) Option {
-	return func(o *Options) {
-		o.Out = out
+func WithOutput(out io.Writer) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, out, ".Out")
 	}
 }
 
 // WithCallerSkipCount set frame count to skip
-func WithCallerSkipCount(c int) Option {
-	return func(o *Options) {
-		o.CallerSkipCount = c
+func WithCallerSkipCount(c int) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, c, ".CallerSkipCount")
 	}
 }
 
-// WithContext set context
-func WithContext(ctx context.Context) Option {
-	return func(o *Options) {
-		o.Context = ctx
+func WithZapKeys() options.Option {
+	return func(src interface{}) error {
+		var err error
+		if err = options.Set(src, "@timestamp", ".TimeKey"); err != nil {
+			return err
+		}
+		if err = options.Set(src, "level", ".LevelKey"); err != nil {
+			return err
+		}
+		if err = options.Set(src, "msg", ".MessageKey"); err != nil {
+			return err
+		}
+		if err = options.Set(src, "caller", ".SourceKey"); err != nil {
+			return err
+		}
+		if err = options.Set(src, "stacktrace", ".StacktraceKey"); err != nil {
+			return err
+		}
+		if err = options.Set(src, "error", ".ErrorKey"); err != nil {
+			return err
+		}
+		return nil
 	}
 }
 
-// WithName sets the name
-func WithName(n string) Option {
-	return func(o *Options) {
-		o.Name = n
+func WithZerologKeys() options.Option {
+	return func(src interface{}) error {
+		var err error
+		if err = options.Set(src, "time", ".TimeKey"); err != nil {
+			return err
+		}
+		if err = options.Set(src, "level", ".LevelKey"); err != nil {
+			return err
+		}
+		if err = options.Set(src, "message", ".MessageKey"); err != nil {
+			return err
+		}
+		if err = options.Set(src, "caller", ".SourceKey"); err != nil {
+			return err
+		}
+		if err = options.Set(src, "stacktrace", ".StacktraceKey"); err != nil {
+			return err
+		}
+		if err = options.Set(src, "error", ".ErrorKey"); err != nil {
+			return err
+		}
+		return nil
 	}
 }
 
-// WrapLogger adds a logger Wrapper to a list of options passed into the logger
-func WrapLogger(w Wrapper) Option {
-	return func(o *Options) {
-		o.Wrappers = append(o.Wrappers, w)
+func WithSlogKeys() options.Option {
+	return func(src interface{}) error {
+		var err error
+		if err = options.Set(src, slog.TimeKey, ".TimeKey"); err != nil {
+			return err
+		}
+		if err = options.Set(src, slog.LevelKey, ".LevelKey"); err != nil {
+			return err
+		}
+		if err = options.Set(src, slog.MessageKey, ".MessageKey"); err != nil {
+			return err
+		}
+		if err = options.Set(src, slog.SourceKey, ".SourceKey"); err != nil {
+			return err
+		}
+		if err = options.Set(src, "stacktrace", ".StacktraceKey"); err != nil {
+			return err
+		}
+		if err = options.Set(src, "error", ".ErrorKey"); err != nil {
+			return err
+		}
+		return nil
+	}
+}
+
+func WithMicroKeys() options.Option {
+	return func(src interface{}) error {
+		var err error
+		if err = options.Set(src, "timestamp", ".TimeKey"); err != nil {
+			return err
+		}
+		if err = options.Set(src, "level", ".LevelKey"); err != nil {
+			return err
+		}
+		if err = options.Set(src, "msg", ".MessageKey"); err != nil {
+			return err
+		}
+		if err = options.Set(src, "caller", ".SourceKey"); err != nil {
+			return err
+		}
+		if err = options.Set(src, "stacktrace", ".StacktraceKey"); err != nil {
+			return err
+		}
+		if err = options.Set(src, "error", ".ErrorKey"); err != nil {
+			return err
+		}
+		return nil
+	}
+}
+
+// WithAddCallerSkipCount add skip count for copy logger
+func WithAddCallerSkipCount(n int) options.Option {
+	return func(src interface{}) error {
+		c, err := options.Get(src, ".CallerSkipCount")
+		if err != nil {
+			return err
+		}
+		if err = options.Set(src, c.(int)+n, ".CallerSkipCount"); err != nil {
+			return err
+		}
+		return nil
+	}
+}
+
+// WithAddStacktrace controls writing stacktrace on error
+func WithAddStacktrace(v bool) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, v, ".AddStacktrace")
+	}
+}
+
+// WitAddSource controls writing source file and pos in log
+func WithAddSource(v bool) options.Option {
+	return func(src interface{}) error {
+		return options.Set(src, v, ".AddSource")
 	}
 }

logger/slog/slog.go

@@ -0,0 +1,378 @@
+package slog
+
+import (
+	"context"
+	"log/slog"
+	"os"
+	"regexp"
+	"runtime"
+	"strconv"
+	"sync"
+
+	"go.unistack.org/micro/v4/logger"
+	"go.unistack.org/micro/v4/options"
+	"go.unistack.org/micro/v4/tracer"
+)
+
+var reTrace = regexp.MustCompile(`.*/slog/logger\.go.*\n`)
+
+var (
+	traceValue = slog.StringValue("trace")
+	debugValue = slog.StringValue("debug")
+	infoValue  = slog.StringValue("info")
+	warnValue  = slog.StringValue("warn")
+	errorValue = slog.StringValue("error")
+	fatalValue = slog.StringValue("fatal")
+)
+
+func (s *slogLogger) renameAttr(_ []string, a slog.Attr) slog.Attr {
+	switch a.Key {
+	case slog.SourceKey:
+		source := a.Value.Any().(*slog.Source)
+		a.Value = slog.StringValue(source.File + ":" + strconv.Itoa(source.Line))
+		a.Key = s.opts.SourceKey
+	case slog.TimeKey:
+		a.Key = s.opts.TimeKey
+	case slog.MessageKey:
+		a.Key = s.opts.MessageKey
+	case slog.LevelKey:
+		level := a.Value.Any().(slog.Level)
+		lvl := slogToLoggerLevel(level)
+		a.Key = s.opts.LevelKey
+		switch {
+		case lvl < logger.DebugLevel:
+			a.Value = traceValue
+		case lvl < logger.InfoLevel:
+			a.Value = debugValue
+		case lvl < logger.WarnLevel:
+			a.Value = infoValue
+		case lvl < logger.ErrorLevel:
+			a.Value = warnValue
+		case lvl < logger.FatalLevel:
+			a.Value = errorValue
+		case lvl >= logger.FatalLevel:
+			a.Value = fatalValue
+		default:
+			a.Value = infoValue
+		}
+	}
+
+	return a
+}
+
+type slogLogger struct {
+	leveler *slog.LevelVar
+	handler slog.Handler
+	opts    logger.Options
+	mu      sync.RWMutex
+}
+
+func (s *slogLogger) Clone(opts ...options.Option) logger.Logger {
+	s.mu.RLock()
+	options := s.opts
+	s.mu.RUnlock()
+
+	for _, o := range opts {
+		_ = o(&options)
+	}
+
+	l := &slogLogger{
+		opts: options,
+	}
+
+	l.leveler = new(slog.LevelVar)
+	handleOpt := &slog.HandlerOptions{
+		ReplaceAttr: l.renameAttr,
+		Level:       l.leveler,
+		AddSource:   l.opts.AddSource,
+	}
+	l.leveler.Set(loggerToSlogLevel(l.opts.Level))
+	l.handler = slog.New(slog.NewJSONHandler(options.Out, handleOpt)).With(options.Attrs...).Handler()
+
+	return l
+}
+
+func (s *slogLogger) V(level logger.Level) bool {
+	return s.opts.Level.Enabled(level)
+}
+
+func (s *slogLogger) Level(level logger.Level) {
+	s.leveler.Set(loggerToSlogLevel(level))
+}
+
+func (s *slogLogger) Options() logger.Options {
+	return s.opts
+}
+
+func (s *slogLogger) Attrs(attrs ...interface{}) logger.Logger {
+	s.mu.RLock()
+	level := s.leveler.Level()
+	options := s.opts
+	s.mu.RUnlock()
+
+	l := &slogLogger{opts: options}
+	l.leveler = new(slog.LevelVar)
+	l.leveler.Set(level)
+
+	handleOpt := &slog.HandlerOptions{
+		ReplaceAttr: l.renameAttr,
+		Level:       l.leveler,
+		AddSource:   l.opts.AddSource,
+	}
+
+	l.handler = slog.New(slog.NewJSONHandler(s.opts.Out, handleOpt)).With(attrs...).Handler()
+
+	return l
+}
+
+func (s *slogLogger) Init(opts ...options.Option) error {
+	s.mu.Lock()
+
+	if len(s.opts.ContextAttrFuncs) == 0 {
+		s.opts.ContextAttrFuncs = logger.DefaultContextAttrFuncs
+	}
+
+	for _, o := range opts {
+		if err := o(&s.opts); err != nil {
+			return err
+		}
+	}
+
+	s.leveler = new(slog.LevelVar)
+	handleOpt := &slog.HandlerOptions{
+		ReplaceAttr: s.renameAttr,
+		Level:       s.leveler,
+		AddSource:   s.opts.AddSource,
+	}
+	s.leveler.Set(loggerToSlogLevel(s.opts.Level))
+	s.handler = slog.New(slog.NewJSONHandler(s.opts.Out, handleOpt)).With(s.opts.Attrs...).Handler()
+	s.mu.Unlock()
+
+	return nil
+}
+
+func (s *slogLogger) Log(ctx context.Context, lvl logger.Level, msg string, attrs ...interface{}) {
+	if !s.V(lvl) {
+		return
+	}
+	var pcs [1]uintptr
+	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
+	r := slog.NewRecord(s.opts.TimeFunc(), loggerToSlogLevel(lvl), msg, pcs[0])
+	for _, fn := range s.opts.ContextAttrFuncs {
+		attrs = append(attrs, fn(ctx)...)
+	}
+	for idx, attr := range attrs {
+		if ve, ok := attr.(error); ok && ve != nil {
+			attrs[idx] = slog.String(s.opts.ErrorKey, ve.Error())
+			break
+		}
+	}
+	if s.opts.AddStacktrace && lvl == logger.ErrorLevel {
+		stackInfo := make([]byte, 1024*1024)
+		if stackSize := runtime.Stack(stackInfo, false); stackSize > 0 {
+			traceLines := reTrace.Split(string(stackInfo[:stackSize]), -1)
+			if len(traceLines) != 0 {
+				attrs = append(attrs, slog.String(s.opts.StacktraceKey, traceLines[len(traceLines)-1]))
+			}
+		}
+	}
+	r.Add(attrs...)
+	r.Attrs(func(a slog.Attr) bool {
+		if a.Key == s.opts.ErrorKey {
+			if span, ok := tracer.SpanFromContext(ctx); ok {
+				span.SetStatus(tracer.SpanStatusError, a.Value.String())
+				return false
+			}
+		}
+		return true
+	})
+	_ = s.handler.Handle(ctx, r)
+}
+
+func (s *slogLogger) Info(ctx context.Context, msg string, attrs ...interface{}) {
+	if !s.V(logger.InfoLevel) {
+		return
+	}
+	var pcs [1]uintptr
+	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
+	r := slog.NewRecord(s.opts.TimeFunc(), slog.LevelInfo, msg, pcs[0])
+	for _, fn := range s.opts.ContextAttrFuncs {
+		attrs = append(attrs, fn(ctx)...)
+	}
+	for idx, attr := range attrs {
+		if ve, ok := attr.(error); ok && ve != nil {
+			attrs[idx] = slog.String(s.opts.ErrorKey, ve.Error())
+			break
+		}
+	}
+	r.Add(attrs...)
+	_ = s.handler.Handle(ctx, r)
+}
+
+func (s *slogLogger) Debug(ctx context.Context, msg string, attrs ...interface{}) {
+	if !s.V(logger.DebugLevel) {
+		return
+	}
+	var pcs [1]uintptr
+	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
+	r := slog.NewRecord(s.opts.TimeFunc(), slog.LevelDebug, msg, pcs[0])
+	for _, fn := range s.opts.ContextAttrFuncs {
+		attrs = append(attrs, fn(ctx)...)
+	}
+	for idx, attr := range attrs {
+		if ve, ok := attr.(error); ok && ve != nil {
+			attrs[idx] = slog.String(s.opts.ErrorKey, ve.Error())
+			break
+		}
+	}
+	r.Add(attrs...)
+	_ = s.handler.Handle(ctx, r)
+}
+
+func (s *slogLogger) Trace(ctx context.Context, msg string, attrs ...interface{}) {
+	if !s.V(logger.TraceLevel) {
+		return
+	}
+	var pcs [1]uintptr
+	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
+	r := slog.NewRecord(s.opts.TimeFunc(), slog.LevelDebug-1, msg, pcs[0])
+	for _, fn := range s.opts.ContextAttrFuncs {
+		attrs = append(attrs, fn(ctx)...)
+	}
+	for idx, attr := range attrs {
+		if ve, ok := attr.(error); ok && ve != nil {
+			attrs[idx] = slog.String(s.opts.ErrorKey, ve.Error())
+			break
+		}
+	}
+	r.Add(attrs...)
+	_ = s.handler.Handle(ctx, r)
+}
+
+func (s *slogLogger) Error(ctx context.Context, msg string, attrs ...interface{}) {
+	if !s.V(logger.ErrorLevel) {
+		return
+	}
+	var pcs [1]uintptr
+	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
+	r := slog.NewRecord(s.opts.TimeFunc(), slog.LevelError, msg, pcs[0])
+	for _, fn := range s.opts.ContextAttrFuncs {
+		attrs = append(attrs, fn(ctx)...)
+	}
+	for idx, attr := range attrs {
+		if ve, ok := attr.(error); ok && ve != nil {
+			attrs[idx] = slog.String(s.opts.ErrorKey, ve.Error())
+			break
+		}
+	}
+	if s.opts.AddStacktrace {
+		stackInfo := make([]byte, 1024*1024)
+		if stackSize := runtime.Stack(stackInfo, false); stackSize > 0 {
+			traceLines := reTrace.Split(string(stackInfo[:stackSize]), -1)
+			if len(traceLines) != 0 {
+				attrs = append(attrs, slog.String(s.opts.StacktraceKey, traceLines[len(traceLines)-1]))
+			}
+		}
+	}
+	r.Add(attrs...)
+	r.Attrs(func(a slog.Attr) bool {
+		if a.Key == s.opts.ErrorKey {
+			if span, ok := tracer.SpanFromContext(ctx); ok {
+				span.SetStatus(tracer.SpanStatusError, a.Value.String())
+				return false
+			}
+		}
+		return true
+	})
+	_ = s.handler.Handle(ctx, r)
+}
+
+func (s *slogLogger) Fatal(ctx context.Context, msg string, attrs ...interface{}) {
+	if !s.V(logger.FatalLevel) {
+		return
+	}
+	var pcs [1]uintptr
+	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
+	r := slog.NewRecord(s.opts.TimeFunc(), slog.LevelError+1, msg, pcs[0])
+	for _, fn := range s.opts.ContextAttrFuncs {
+		attrs = append(attrs, fn(ctx)...)
+	}
+	for idx, attr := range attrs {
+		if ve, ok := attr.(error); ok && ve != nil {
+			attrs[idx] = slog.String(s.opts.ErrorKey, ve.Error())
+			break
+		}
+	}
+	r.Add(attrs...)
+	_ = s.handler.Handle(ctx, r)
+	os.Exit(1)
+}
+
+func (s *slogLogger) Warn(ctx context.Context, msg string, attrs ...interface{}) {
+	if !s.V(logger.WarnLevel) {
+		return
+	}
+	var pcs [1]uintptr
+	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, Infof]
+	r := slog.NewRecord(s.opts.TimeFunc(), slog.LevelWarn, msg, pcs[0])
+	for _, fn := range s.opts.ContextAttrFuncs {
+		attrs = append(attrs, fn(ctx)...)
+	}
+	for idx, attr := range attrs {
+		if ve, ok := attr.(error); ok && ve != nil {
+			attrs[idx] = slog.String(s.opts.ErrorKey, ve.Error())
+			break
+		}
+	}
+	r.Add(attrs...)
+	_ = s.handler.Handle(ctx, r)
+}
+
+func (s *slogLogger) Name() string {
+	return s.opts.Name
+}
+
+func (s *slogLogger) String() string {
+	return "slog"
+}
+
+func NewLogger(opts ...options.Option) logger.Logger {
+	l := &slogLogger{
+		opts: logger.NewOptions(opts...),
+	}
+	return l
+}
+
+func loggerToSlogLevel(level logger.Level) slog.Level {
+	switch level {
+	case logger.DebugLevel:
+		return slog.LevelDebug
+	case logger.WarnLevel:
+		return slog.LevelWarn
+	case logger.ErrorLevel:
+		return slog.LevelError
+	case logger.TraceLevel:
+		return slog.LevelDebug - 1
+	case logger.FatalLevel:
+		return slog.LevelError + 1
+	default:
+		return slog.LevelInfo
+	}
+}
+
+func slogToLoggerLevel(level slog.Level) logger.Level {
+	switch level {
+	case slog.LevelDebug:
+		return logger.DebugLevel
+	case slog.LevelWarn:
+		return logger.WarnLevel
+	case slog.LevelError:
+		return logger.ErrorLevel
+	case slog.LevelDebug - 1:
+		return logger.TraceLevel
+	case slog.LevelError + 1:
+		return logger.FatalLevel
+	default:
+		return logger.InfoLevel
+	}
+}

logger/slog/slog_test.go

@@ -0,0 +1,155 @@
+package slog
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"log"
+	"testing"
+
+	"go.unistack.org/micro/v4/logger"
+)
+
+func TestError(t *testing.T) {
+	ctx := context.TODO()
+	buf := bytes.NewBuffer(nil)
+	l := NewLogger(logger.WithLevel(logger.ErrorLevel), logger.WithOutput(buf), logger.WithAddStacktrace(true))
+	if err := l.Init(); err != nil {
+		t.Fatal(err)
+	}
+	l.Error(ctx, "msg", fmt.Errorf("message"))
+	if !bytes.Contains(buf.Bytes(), []byte(`"stacktrace":"`)) {
+		t.Fatalf("logger stacktrace not works, buf contains: %s", buf.Bytes())
+	}
+}
+
+func TestContext(t *testing.T) {
+	ctx := context.TODO()
+	buf := bytes.NewBuffer(nil)
+	l := NewLogger(logger.WithLevel(logger.TraceLevel), logger.WithOutput(buf))
+	if err := l.Init(); err != nil {
+		t.Fatal(err)
+	}
+
+	nl, ok := logger.FromContext(logger.NewContext(ctx, l.Attrs("key", "val")))
+	if !ok {
+		t.Fatal("context without logger")
+	}
+	nl.Info(ctx, "message")
+	if !bytes.Contains(buf.Bytes(), []byte(`"key":"val"`)) {
+		t.Fatalf("logger fields not works, buf contains: %s", buf.Bytes())
+	}
+}
+
+func TestAttrs(t *testing.T) {
+	ctx := context.TODO()
+	buf := bytes.NewBuffer(nil)
+	l := NewLogger(logger.WithLevel(logger.TraceLevel), logger.WithOutput(buf))
+	if err := l.Init(); err != nil {
+		t.Fatal(err)
+	}
+
+	nl := l.Attrs("key", "val")
+
+	nl.Info(ctx, "message")
+	if !bytes.Contains(buf.Bytes(), []byte(`"key":"val"`)) {
+		t.Fatalf("logger fields not works, buf contains: %s", buf.Bytes())
+	}
+}
+
+func TestFromContextWithFields(t *testing.T) {
+	ctx := context.TODO()
+	buf := bytes.NewBuffer(nil)
+	var ok bool
+	l := NewLogger(logger.WithLevel(logger.TraceLevel), logger.WithOutput(buf))
+	if err := l.Init(); err != nil {
+		t.Fatal(err)
+	}
+	nl := l.Attrs("key", "val")
+
+	ctx = logger.NewContext(ctx, nl)
+
+	l, ok = logger.FromContext(ctx)
+	if !ok {
+		t.Fatalf("context does not have logger")
+	}
+
+	l.Info(ctx, "message")
+	if !bytes.Contains(buf.Bytes(), []byte(`"key":"val"`)) {
+		t.Fatalf("logger fields not works, buf contains: %s", buf.Bytes())
+	}
+}
+
+func TestClone(t *testing.T) {
+	ctx := context.TODO()
+	buf := bytes.NewBuffer(nil)
+	l := NewLogger(logger.WithLevel(logger.TraceLevel), logger.WithOutput(buf))
+	if err := l.Init(); err != nil {
+		t.Fatal(err)
+	}
+	nl := l.Clone(logger.WithLevel(logger.ErrorLevel))
+	if err := nl.Init(); err != nil {
+		t.Fatal(err)
+	}
+	nl.Info(ctx, "info message")
+	if len(buf.Bytes()) != 0 {
+		t.Fatal("message must not be logged")
+	}
+	l.Info(ctx, "info message")
+	if len(buf.Bytes()) == 0 {
+		t.Fatal("message must be logged")
+	}
+}
+
+func TestRedirectStdLogger(t *testing.T) {
+	buf := bytes.NewBuffer(nil)
+	l := NewLogger(logger.WithLevel(logger.ErrorLevel), logger.WithOutput(buf))
+	if err := l.Init(); err != nil {
+		t.Fatal(err)
+	}
+	fn := logger.RedirectStdLogger(l, logger.ErrorLevel)
+	defer fn()
+	log.Print("test")
+	if !(bytes.Contains(buf.Bytes(), []byte(`"level":"error"`)) && bytes.Contains(buf.Bytes(), []byte(`"msg":"test"`))) {
+		t.Fatalf("logger error, buf %s", buf.Bytes())
+	}
+}
+
+func TestStdLogger(t *testing.T) {
+	buf := bytes.NewBuffer(nil)
+	l := NewLogger(logger.WithLevel(logger.TraceLevel), logger.WithOutput(buf))
+	if err := l.Init(); err != nil {
+		t.Fatal(err)
+	}
+	lg := logger.NewStdLogger(l, logger.ErrorLevel)
+	lg.Print("test")
+	if !(bytes.Contains(buf.Bytes(), []byte(`"level":"error"`)) && bytes.Contains(buf.Bytes(), []byte(`"msg":"test"`))) {
+		t.Fatalf("logger error, buf %s", buf.Bytes())
+	}
+}
+
+func TestLogger(t *testing.T) {
+	ctx := context.TODO()
+	buf := bytes.NewBuffer(nil)
+	l := NewLogger(logger.WithLevel(logger.TraceLevel), logger.WithOutput(buf))
+	if err := l.Init(); err != nil {
+		t.Fatal(err)
+	}
+	l.Trace(ctx, "trace_msg1")
+	l.Warn(ctx, "warn_msg1")
+	l.Attrs("error", "test").Info(ctx, "error message")
+	l.Warn(ctx, "first second")
+
+	if !(bytes.Contains(buf.Bytes(), []byte(`"level":"trace"`)) && bytes.Contains(buf.Bytes(), []byte(`"msg":"trace_msg1"`))) {
+		t.Fatalf("logger tracer, buf %s", buf.Bytes())
+	}
+	if !(bytes.Contains(buf.Bytes(), []byte(`"level":"warn"`)) && bytes.Contains(buf.Bytes(), []byte(`"msg":"warn_msg1"`))) {
+		t.Fatalf("logger warn, buf %s", buf.Bytes())
+	}
+	if !(bytes.Contains(buf.Bytes(), []byte(`"level":"info"`)) && bytes.Contains(buf.Bytes(), []byte(`"msg":"error message","error":"test"`))) {
+		t.Fatalf("logger info, buf %s", buf.Bytes())
+	}
+	if !(bytes.Contains(buf.Bytes(), []byte(`"level":"warn"`)) && bytes.Contains(buf.Bytes(), []byte(`"msg":"first second"`))) {
+		t.Fatalf("logger warn, buf %s", buf.Bytes())
+	}
+}

logger/stdlogger.go

@@ -12,7 +12,7 @@ type stdLogger struct {
 
 // NewStdLogger returns new *log.Logger baked by logger.Logger implementation
 func NewStdLogger(l Logger, level Level) *log.Logger {
-	return log.New(&stdLogger{l: l, level: level}, "" /* prefix */, 0 /* flags */)
+	return log.New(&stdLogger{l: l.Clone(WithCallerSkipCount(l.Options().CallerSkipCount + 1)), level: level}, "" /* prefix */, 0 /* flags */)
 }
 
 func (sl *stdLogger) Write(p []byte) (int, error) {

logger/unwrap/unwrap.go

@@ -8,7 +8,7 @@ import (
 	"strconv"
 	"strings"
 
-	"go.unistack.org/micro/v3/codec"
+	"go.unistack.org/micro/v4/codec"
 )
 
 const sf = "0-+# "
@@ -35,6 +35,7 @@ var (
 	nilAngleBytes      = []byte("<nil>")
 	circularShortBytes = []byte("<shown>")
 	invalidAngleBytes  = []byte("<invalid>")
+	filteredBytes      = []byte("<filtered>")
 	openBracketBytes   = []byte("[")
 	closeBracketBytes  = []byte("]")
 	percentBytes       = []byte("%")
@@ -45,15 +46,24 @@ var (
 	closeMapBytes      = []byte("}")
 )
 
-type unwrap struct {
-	val            interface{}
-	s              fmt.State
-	depth          int
-	pointers       map[uintptr]int
-	opts           *Options
-	ignoreNextType bool
+type protoMessage interface {
+	Reset()
+	ProtoMessage()
 }
 
+type Wrapper struct {
+	val              interface{}
+	s                fmt.State
+	pointers         map[uintptr]int
+	opts             *Options
+	takeMap          map[int]bool
+	depth            int
+	ignoreNextType   bool
+	protoWrapperType bool
+	sqlWrapperType   bool
+}
+
+// Options struct
 type Options struct {
 	Codec   codec.Codec
 	Indent  string
@@ -61,6 +71,7 @@ type Options struct {
 	Tagged  bool
 }
 
+// NewOptions creates new Options struct via provided args
 func NewOptions(opts ...Option) Options {
 	options := Options{
 		Indent:  " ",
@@ -72,40 +83,45 @@ func NewOptions(opts ...Option) Options {
 	return options
 }
 
+// Option func signature
 type Option func(*Options)
 
+// Indent option specify indent level
 func Indent(f string) Option {
 	return func(o *Options) {
 		o.Indent = f
 	}
 }
 
+// Methods option toggles fmt.Stringer methods
 func Methods(b bool) Option {
 	return func(o *Options) {
 		o.Methods = b
 	}
 }
 
+// Codec option automatic marshal arg via specified codec and write it to log
 func Codec(c codec.Codec) Option {
 	return func(o *Options) {
 		o.Codec = c
 	}
 }
 
+// Tagged option toggles output only logger:"take" fields
 func Tagged(b bool) Option {
 	return func(o *Options) {
 		o.Tagged = b
 	}
 }
 
-func Unwrap(val interface{}, opts ...Option) *unwrap {
+func Unwrap(val interface{}, opts ...Option) *Wrapper {
 	options := NewOptions(opts...)
-	return &unwrap{val: val, opts: &options, pointers: make(map[uintptr]int)}
+	return &Wrapper{val: val, opts: &options, pointers: make(map[uintptr]int), takeMap: make(map[int]bool)}
 }
 
-func (f *unwrap) unpackValue(v reflect.Value) reflect.Value {
+func (w *Wrapper) unpackValue(v reflect.Value) reflect.Value {
 	if v.Kind() == reflect.Interface {
-		f.ignoreNextType = false
+		w.ignoreNextType = false
 		if !v.IsNil() {
 			v = v.Elem()
 		}
@@ -114,19 +130,19 @@ func (f *unwrap) unpackValue(v reflect.Value) reflect.Value {
 }
 
 // formatPtr handles formatting of pointers by indirecting them as necessary.
-func (f *unwrap) formatPtr(v reflect.Value) {
+func (w *Wrapper) formatPtr(v reflect.Value) {
 	// Display nil if top level pointer is nil.
-	showTypes := f.s.Flag('#')
-	if v.IsNil() && (!showTypes || f.ignoreNextType) {
-		_, _ = f.s.Write(nilAngleBytes)
+	showTypes := w.s.Flag('#')
+	if v.IsNil() && (!showTypes || w.ignoreNextType) {
+		_, _ = w.s.Write(nilAngleBytes)
 		return
 	}
 
 	// Remove pointers at or below the current depth from map used to detect
 	// circular refs.
-	for k, depth := range f.pointers {
-		if depth >= f.depth {
-			delete(f.pointers, k)
+	for k, depth := range w.pointers {
+		if depth >= w.depth {
+			delete(w.pointers, k)
 		}
 	}
 
@@ -148,12 +164,12 @@ func (f *unwrap) formatPtr(v reflect.Value) {
 		indirects++
 		addr := ve.Pointer()
 		pointerChain = append(pointerChain, addr)
-		if pd, ok := f.pointers[addr]; ok && pd < f.depth {
+		if pd, ok := w.pointers[addr]; ok && pd < w.depth {
 			cycleFound = true
 			indirects--
 			break
 		}
-		f.pointers[addr] = f.depth
+		w.pointers[addr] = w.depth
 
 		ve = ve.Elem()
 		if ve.Kind() == reflect.Interface {
@@ -166,51 +182,49 @@ func (f *unwrap) formatPtr(v reflect.Value) {
 	}
 
 	// Display type or indirection level depending on flags.
-	if showTypes && !f.ignoreNextType {
-		if f.depth > 0 {
-			_, _ = f.s.Write(openParenBytes)
+	if showTypes && !w.ignoreNextType {
+		if w.depth > 0 {
+			_, _ = w.s.Write(openParenBytes)
 		}
-		if f.depth > 0 {
-			_, _ = f.s.Write(bytes.Repeat(asteriskBytes, indirects))
+		if w.depth > 0 {
+			_, _ = w.s.Write(bytes.Repeat(asteriskBytes, indirects))
 		} else {
-			_, _ = f.s.Write(bytes.Repeat(ampBytes, indirects))
+			_, _ = w.s.Write(bytes.Repeat(ampBytes, indirects))
 		}
-		_, _ = f.s.Write([]byte(ve.Type().String()))
-		if f.depth > 0 {
-			_, _ = f.s.Write(closeParenBytes)
+		_, _ = w.s.Write([]byte(ve.Type().String()))
+		if w.depth > 0 {
+			_, _ = w.s.Write(closeParenBytes)
 		}
 	} else {
 		if nilFound || cycleFound {
 			indirects += strings.Count(ve.Type().String(), "*")
 		}
-		_, _ = f.s.Write(openAngleBytes)
-		_, _ = f.s.Write([]byte(strings.Repeat("*", indirects)))
-		_, _ = f.s.Write(closeAngleBytes)
+		_, _ = w.s.Write(openAngleBytes)
+		_, _ = w.s.Write([]byte(strings.Repeat("*", indirects)))
+		_, _ = w.s.Write(closeAngleBytes)
 	}
 
 	// Display pointer information depending on flags.
-	if f.s.Flag('+') && (len(pointerChain) > 0) {
-		_, _ = f.s.Write(openParenBytes)
+	if w.s.Flag('+') && (len(pointerChain) > 0) {
+		_, _ = w.s.Write(openParenBytes)
 		for i, addr := range pointerChain {
 			if i > 0 {
-				_, _ = f.s.Write(pointerChainBytes)
+				_, _ = w.s.Write(pointerChainBytes)
 			}
-			getHexPtr(f.s, addr)
+			getHexPtr(w.s, addr)
 		}
-		_, _ = f.s.Write(closeParenBytes)
+		_, _ = w.s.Write(closeParenBytes)
 	}
 
 	// Display dereferenced value.
 	switch {
 	case nilFound:
-		_, _ = f.s.Write(nilAngleBytes)
-
+		_, _ = w.s.Write(nilAngleBytes)
 	case cycleFound:
-		_, _ = f.s.Write(circularShortBytes)
-
+		_, _ = w.s.Write(circularShortBytes)
 	default:
-		f.ignoreNextType = true
-		f.format(ve)
+		w.ignoreNextType = true
+		w.format(ve)
 	}
 }
 
@@ -218,54 +232,73 @@ func (f *unwrap) formatPtr(v reflect.Value) {
 // uses the passed reflect value to figure out what kind of object we are
 // dealing with and formats it appropriately.  It is a recursive function,
 // however circular data structures are detected and handled properly.
-func (f *unwrap) format(v reflect.Value) {
-	if f.opts.Codec != nil {
-		buf, err := f.opts.Codec.Marshal(v.Interface())
+func (w *Wrapper) format(v reflect.Value) {
+	if w.opts.Codec != nil {
+		buf, err := w.opts.Codec.Marshal(v.Interface())
 		if err != nil {
-			_, _ = f.s.Write(invalidAngleBytes)
+			_, _ = w.s.Write(invalidAngleBytes)
 			return
 		}
-		_, _ = f.s.Write(buf)
+		_, _ = w.s.Write(buf)
 		return
 	}
+
 	// Handle invalid reflect values immediately.
 	kind := v.Kind()
 	if kind == reflect.Invalid {
-		_, _ = f.s.Write(invalidAngleBytes)
+		_, _ = w.s.Write(invalidAngleBytes)
 		return
 	}
 
 	// Handle pointers specially.
-	if kind == reflect.Ptr {
-		f.formatPtr(v)
+	switch kind {
+	case reflect.Ptr:
+		if !v.IsZero() {
+			if strings.HasPrefix(reflect.Indirect(v).Type().String(), "wrapperspb.") {
+				w.protoWrapperType = true
+			} else if strings.HasPrefix(reflect.Indirect(v).Type().String(), "sql.Null") {
+				w.sqlWrapperType = true
+			} else if v.CanInterface() {
+				if _, ok := v.Interface().(protoMessage); ok {
+					w.protoWrapperType = true
+				}
+			}
+		}
+		w.formatPtr(v)
 		return
+	case reflect.Struct:
+		if !v.IsZero() {
+			if strings.HasPrefix(reflect.Indirect(v).Type().String(), "sql.Null") {
+				w.sqlWrapperType = true
+			}
+		}
 	}
 
 	// get type information unless already handled elsewhere.
-	if !f.ignoreNextType && f.s.Flag('#') {
+	if !w.ignoreNextType && w.s.Flag('#') {
 		if v.Type().Kind() != reflect.Map &&
 			v.Type().Kind() != reflect.String &&
 			v.Type().Kind() != reflect.Array &&
 			v.Type().Kind() != reflect.Slice {
-			_, _ = f.s.Write(openParenBytes)
+			_, _ = w.s.Write(openParenBytes)
 		}
 		if v.Kind() != reflect.String {
-			_, _ = f.s.Write([]byte(v.Type().String()))
+			_, _ = w.s.Write([]byte(v.Type().String()))
 		}
 		if v.Type().Kind() != reflect.Map &&
 			v.Type().Kind() != reflect.String &&
 			v.Type().Kind() != reflect.Array &&
 			v.Type().Kind() != reflect.Slice {
-			_, _ = f.s.Write(closeParenBytes)
+			_, _ = w.s.Write(closeParenBytes)
 		}
 	}
-	f.ignoreNextType = false
+	w.ignoreNextType = false
 
 	// Call Stringer/error interfaces if they exist and the handle methods
 	// flag is enabled.
-	if !f.opts.Methods {
+	if w.opts.Methods {
 		if (kind != reflect.Invalid) && (kind != reflect.Interface) {
-			if handled := handleMethods(f.opts, f.s, v); handled {
+			if handled := handleMethods(w.opts, w.s, v); handled {
 				return
 			}
 		}
@@ -273,48 +306,48 @@ func (f *unwrap) format(v reflect.Value) {
 
 	switch kind {
 	case reflect.Invalid:
-		_, _ = f.s.Write(invalidAngleBytes)
+		_, _ = w.s.Write(invalidAngleBytes)
 	case reflect.Bool:
-		getBool(f.s, v.Bool())
+		getBool(w.s, v.Bool())
 	case reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Int:
-		getInt(f.s, v.Int(), 10)
+		getInt(w.s, v.Int(), 10)
 	case reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint:
-		getUint(f.s, v.Uint(), 10)
+		getUint(w.s, v.Uint(), 10)
 	case reflect.Float32:
-		getFloat(f.s, v.Float(), 32)
+		getFloat(w.s, v.Float(), 32)
 	case reflect.Float64:
-		getFloat(f.s, v.Float(), 64)
+		getFloat(w.s, v.Float(), 64)
 	case reflect.Complex64:
-		getComplex(f.s, v.Complex(), 32)
+		getComplex(w.s, v.Complex(), 32)
 	case reflect.Complex128:
-		getComplex(f.s, v.Complex(), 64)
+		getComplex(w.s, v.Complex(), 64)
 	case reflect.Slice:
 		if v.IsNil() {
-			_, _ = f.s.Write(nilAngleBytes)
+			_, _ = w.s.Write(nilAngleBytes)
 			break
 		}
 		fallthrough
 	case reflect.Array:
-		_, _ = f.s.Write(openBraceBytes)
-		f.depth++
+		_, _ = w.s.Write(openBraceBytes)
+		w.depth++
 		numEntries := v.Len()
 		for i := 0; i < numEntries; i++ {
 			if i > 0 {
-				_, _ = f.s.Write(commaBytes)
-				_, _ = f.s.Write(spaceBytes)
+				_, _ = w.s.Write(commaBytes)
+				_, _ = w.s.Write(spaceBytes)
 			}
-			f.ignoreNextType = true
-			f.format(f.unpackValue(v.Index(i)))
+			w.ignoreNextType = true
+			w.format(w.unpackValue(v.Index(i)))
 		}
-		f.depth--
-		_, _ = f.s.Write(closeBraceBytes)
+		w.depth--
+		_, _ = w.s.Write(closeBraceBytes)
 	case reflect.String:
-		_, _ = f.s.Write([]byte(`"` + v.String() + `"`))
+		_, _ = w.s.Write([]byte(`"` + v.String() + `"`))
 	case reflect.Interface:
 		// The only time we should get here is for nil interfaces due to
 		// unpackValue calls.
 		if v.IsNil() {
-			_, _ = f.s.Write(nilAngleBytes)
+			_, _ = w.s.Write(nilAngleBytes)
 		}
 	case reflect.Ptr:
 		// Do nothing.  We should never get here since pointers have already
@@ -322,84 +355,123 @@ func (f *unwrap) format(v reflect.Value) {
 	case reflect.Map:
 		// nil maps should be indicated as different than empty maps
 		if v.IsNil() {
-			_, _ = f.s.Write(nilAngleBytes)
+			_, _ = w.s.Write(nilAngleBytes)
 			break
 		}
-		_, _ = f.s.Write(openMapBytes)
-		f.depth++
+		_, _ = w.s.Write(openMapBytes)
+		w.depth++
 		keys := v.MapKeys()
 		for i, key := range keys {
 			if i > 0 {
-				_, _ = f.s.Write(spaceBytes)
+				_, _ = w.s.Write(spaceBytes)
 			}
-			f.ignoreNextType = true
-			f.format(f.unpackValue(key))
-			_, _ = f.s.Write(colonBytes)
-			f.ignoreNextType = true
-			f.format(f.unpackValue(v.MapIndex(key)))
+			w.ignoreNextType = true
+			w.format(w.unpackValue(key))
+			_, _ = w.s.Write(colonBytes)
+			w.ignoreNextType = true
+			w.format(w.unpackValue(v.MapIndex(key)))
 		}
-		f.depth--
-		_, _ = f.s.Write(closeMapBytes)
+		w.depth--
+		_, _ = w.s.Write(closeMapBytes)
 	case reflect.Struct:
+
 		numFields := v.NumField()
-		_, _ = f.s.Write(openBraceBytes)
-		f.depth++
+		numWritten := 0
+		_, _ = w.s.Write(openBraceBytes)
+		w.depth++
+
 		vt := v.Type()
 		prevSkip := false
+
 		for i := 0; i < numFields; i++ {
+			switch vt.Field(i).Type.PkgPath() {
+			case "google.golang.org/protobuf/internal/impl", "google.golang.org/protobuf/internal/pragma":
+				w.protoWrapperType = true
+				prevSkip = true
+				continue
+			}
+			if w.protoWrapperType && !vt.Field(i).IsExported() {
+				prevSkip = true
+				continue
+			} else if w.sqlWrapperType && vt.Field(i).Name == "Valid" {
+				prevSkip = true
+				continue
+			}
+			if _, ok := vt.Field(i).Tag.Lookup("protobuf"); ok && !w.protoWrapperType {
+				w.protoWrapperType = true
+			}
 			sv, ok := vt.Field(i).Tag.Lookup("logger")
-			if ok {
-				if sv == "omit" {
+			switch {
+			case ok:
+				switch sv {
+				case "omit":
+					prevSkip = true
+					continue
+				case "take":
+					break
+				}
+			case !ok && w.opts.Tagged:
+				// skip top level untagged
+				if w.depth == 1 {
 					prevSkip = true
 					continue
 				}
-			} else if f.opts.Tagged {
+				if tv, ok := w.takeMap[w.depth]; ok && !tv {
 					prevSkip = true
 					continue
 				}
-			if i > 0 && !prevSkip {
-				_, _ = f.s.Write(commaBytes)
-				_, _ = f.s.Write(spaceBytes)
 			}
+
 			if prevSkip {
 				prevSkip = false
 			}
-			vtf := vt.Field(i)
-			if f.s.Flag('+') || f.s.Flag('#') {
-				_, _ = f.s.Write([]byte(vtf.Name))
-				_, _ = f.s.Write(colonBytes)
+
+			if numWritten > 0 {
+				_, _ = w.s.Write(commaBytes)
+				_, _ = w.s.Write(spaceBytes)
 			}
-			f.format(f.unpackValue(v.Field(i)))
+
+			vt := vt.Field(i)
+			if w.s.Flag('+') || w.s.Flag('#') {
+				_, _ = w.s.Write([]byte(vt.Name))
+				_, _ = w.s.Write(colonBytes)
 			}
-		f.depth--
-		_, _ = f.s.Write(closeBraceBytes)
+			w.format(w.unpackValue(v.Field(i)))
+			numWritten++
+		}
+		w.depth--
+
+		if numWritten == 0 && w.depth < 0 {
+			_, _ = w.s.Write(filteredBytes)
+		}
+		_, _ = w.s.Write(closeBraceBytes)
 	case reflect.Uintptr:
-		getHexPtr(f.s, uintptr(v.Uint()))
+		getHexPtr(w.s, uintptr(v.Uint()))
 	case reflect.UnsafePointer, reflect.Chan, reflect.Func:
-		getHexPtr(f.s, v.Pointer())
+		getHexPtr(w.s, v.Pointer())
 	// There were not any other types at the time this code was written, but
 	// fall back to letting the default fmt package handle it if any get added.
 	default:
-		format := f.buildDefaultFormat()
+		format := w.buildDefaultFormat()
 		if v.CanInterface() {
-			_, _ = fmt.Fprintf(f.s, format, v.Interface())
+			_, _ = fmt.Fprintf(w.s, format, v.Interface())
 		} else {
-			_, _ = fmt.Fprintf(f.s, format, v.String())
+			_, _ = fmt.Fprintf(w.s, format, v.String())
 		}
 	}
 }
 
-func (f *unwrap) Format(s fmt.State, verb rune) {
-	f.s = s
+func (w *Wrapper) Format(s fmt.State, verb rune) {
+	w.s = s
 
 	// Use standard formatting for verbs that are not v.
 	if verb != 'v' {
-		format := f.constructOrigFormat(verb)
-		_, _ = fmt.Fprintf(s, format, f.val)
+		format := w.constructOrigFormat(verb)
+		_, _ = fmt.Fprintf(s, format, w.val)
 		return
 	}
 
-	if f.val == nil {
+	if w.val == nil {
 		if s.Flag('#') {
 			_, _ = s.Write(interfaceBytes)
 		}
@@ -407,7 +479,11 @@ func (f *unwrap) Format(s fmt.State, verb rune) {
 		return
 	}
 
-	f.format(reflect.ValueOf(f.val))
+	if w.opts.Tagged {
+		w.buildTakeMap(reflect.ValueOf(w.val), 1)
+	}
+
+	w.format(reflect.ValueOf(w.val))
 }
 
 // handle special methods like error.Error() or fmt.Stringer interface
@@ -523,11 +599,11 @@ func catchPanic(w io.Writer, _ reflect.Value) {
 	}
 }
 
-func (f *unwrap) buildDefaultFormat() (format string) {
+func (w *Wrapper) buildDefaultFormat() (format string) {
 	buf := bytes.NewBuffer(percentBytes)
 
 	for _, flag := range sf {
-		if f.s.Flag(int(flag)) {
+		if w.s.Flag(int(flag)) {
 			_, _ = buf.WriteRune(flag)
 		}
 	}
@@ -538,26 +614,68 @@ func (f *unwrap) buildDefaultFormat() (format string) {
 	return format
 }
 
-func (f *unwrap) constructOrigFormat(verb rune) (format string) {
+func (w *Wrapper) constructOrigFormat(verb rune) string {
 	buf := bytes.NewBuffer(percentBytes)
 
 	for _, flag := range sf {
-		if f.s.Flag(int(flag)) {
+		if w.s.Flag(int(flag)) {
 			_, _ = buf.WriteRune(flag)
 		}
 	}
 
-	if width, ok := f.s.Width(); ok {
+	if width, ok := w.s.Width(); ok {
 		_, _ = buf.WriteString(strconv.Itoa(width))
 	}
 
-	if precision, ok := f.s.Precision(); ok {
+	if precision, ok := w.s.Precision(); ok {
 		_, _ = buf.Write(precisionBytes)
 		_, _ = buf.WriteString(strconv.Itoa(precision))
 	}
 
 	_, _ = buf.WriteRune(verb)
 
-	format = buf.String()
-	return format
+	return buf.String()
+}
+
+func (w *Wrapper) buildTakeMap(v reflect.Value, depth int) {
+	if !v.IsValid() || v.IsZero() {
+		return
+	}
+
+	switch v.Kind() {
+	case reflect.Slice, reflect.Array:
+		for i := 0; i < v.Len(); i++ {
+			w.buildTakeMap(v.Index(i), depth+1)
+		}
+		w.takeMap[depth] = true
+		return
+	case reflect.Struct:
+		break
+	case reflect.Ptr:
+		v = v.Elem()
+		if v.Kind() != reflect.Struct {
+			w.takeMap[depth] = true
+			return
+		}
+	default:
+		w.takeMap[depth] = true
+		return
+	}
+
+	vt := v.Type()
+
+	for i := 0; i < v.NumField(); i++ {
+		sv, ok := vt.Field(i).Tag.Lookup("logger")
+		if ok && sv == "take" {
+			w.takeMap[depth] = false
+		}
+		if v.Kind() == reflect.Struct ||
+			(v.Kind() == reflect.Ptr && v.Elem().Kind() == reflect.Struct) {
+			w.buildTakeMap(v.Field(i), depth+1)
+		}
+	}
+
+	if _, ok := w.takeMap[depth]; !ok {
+		w.takeMap[depth] = true
+	}
 }

logger/unwrap/unwrap_test.go

@@ -5,7 +5,7 @@ import (
 	"strings"
 	"testing"
 
-	"go.unistack.org/micro/v3/codec"
+	"go.unistack.org/micro/v4/codec"
 )
 
 func TestUnwrap(t *testing.T) {
@@ -57,10 +57,11 @@ func TestOmit(t *testing.T) {
 	type val struct {
 		Key1 string `logger:"omit"`
 		Key2 string `logger:"take"`
+		Key3 string
 	}
-	v1 := &val{Key1: "val1", Key2: "val2"}
+	v1 := &val{Key1: "val1", Key2: "val2", Key3: "val3"}
 	buf := fmt.Sprintf("%#v", Unwrap(v1))
-	if strings.Compare(buf, `&unwrap.val{Key2:"val2"}`) != 0 {
+	if strings.Compare(buf, `&unwrap.val{Key2:"val2", Key3:"val3"}`) != 0 {
 		t.Fatalf("not proper written %s", buf)
 	}
 }
@@ -77,3 +78,23 @@ func TestTagged(t *testing.T) {
 		t.Fatalf("not proper written %s", buf)
 	}
 }
+
+func TestTaggedNested(t *testing.T) {
+	type val struct {
+		key string `logger:"take"`
+		val string `logger:"omit"`
+		unk string
+	}
+	type str struct {
+		key string `logger:"omit"`
+		val *val   `logger:"take"`
+	}
+
+	var iface interface{}
+	v := &str{val: &val{key: "test", unk: "unk"}}
+	iface = v
+	buf := fmt.Sprintf("%#v", Unwrap(iface, Tagged(true)))
+	if strings.Compare(buf, `&unwrap.str{val:(*unwrap.val){key:"test"}}`) != 0 {
+		t.Fatalf("not proper written %s", buf)
+	}
+}

logger/wrapper.go

@@ -1,166 +0,0 @@
-package logger // import "go.unistack.org/micro/v3/logger/wrapper"
-
-import (
-	"context"
-	"reflect"
-
-	rutil "go.unistack.org/micro/v3/util/reflect"
-)
-
-// LogFunc function used for Log method
-type LogFunc func(ctx context.Context, level Level, args ...interface{})
-
-// LogfFunc function used for Logf method
-type LogfFunc func(ctx context.Context, level Level, msg string, args ...interface{})
-
-type Wrapper interface {
-	// Log logs message with needed level
-	Log(LogFunc) LogFunc
-	// Logf logs message with needed level
-	Logf(LogfFunc) LogfFunc
-}
-
-var _ Logger = &omitLogger{}
-
-type omitLogger struct {
-	l Logger
-}
-
-func NewOmitLogger(l Logger) Logger {
-	return &omitLogger{l: l}
-}
-
-func (w *omitLogger) Init(opts ...Option) error {
-	return w.l.Init(append(opts, WrapLogger(NewOmitWrapper()))...)
-}
-
-func (w *omitLogger) V(level Level) bool {
-	return w.l.V(level)
-}
-
-func (w *omitLogger) Level(level Level) {
-	w.l.Level(level)
-}
-
-func (w *omitLogger) Clone(opts ...Option) Logger {
-	return w.l.Clone(opts...)
-}
-
-func (w *omitLogger) Options() Options {
-	return w.l.Options()
-}
-
-func (w *omitLogger) Fields(fields ...interface{}) Logger {
-	return w.l.Fields(fields...)
-}
-
-func (w *omitLogger) Info(ctx context.Context, args ...interface{}) {
-	w.l.Info(ctx, args...)
-}
-
-func (w *omitLogger) Trace(ctx context.Context, args ...interface{}) {
-	w.l.Trace(ctx, args...)
-}
-
-func (w *omitLogger) Debug(ctx context.Context, args ...interface{}) {
-	w.l.Debug(ctx, args...)
-}
-
-func (w *omitLogger) Warn(ctx context.Context, args ...interface{}) {
-	w.l.Warn(ctx, args...)
-}
-
-func (w *omitLogger) Error(ctx context.Context, args ...interface{}) {
-	w.l.Error(ctx, args...)
-}
-
-func (w *omitLogger) Fatal(ctx context.Context, args ...interface{}) {
-	w.l.Fatal(ctx, args...)
-}
-
-func (w *omitLogger) Infof(ctx context.Context, msg string, args ...interface{}) {
-	w.l.Infof(ctx, msg, args...)
-}
-
-func (w *omitLogger) Tracef(ctx context.Context, msg string, args ...interface{}) {
-	w.l.Tracef(ctx, msg, args...)
-}
-
-func (w *omitLogger) Debugf(ctx context.Context, msg string, args ...interface{}) {
-	w.l.Debugf(ctx, msg, args...)
-}
-
-func (w *omitLogger) Warnf(ctx context.Context, msg string, args ...interface{}) {
-	w.l.Warnf(ctx, msg, args...)
-}
-
-func (w *omitLogger) Errorf(ctx context.Context, msg string, args ...interface{}) {
-	w.l.Errorf(ctx, msg, args...)
-}
-
-func (w *omitLogger) Fatalf(ctx context.Context, msg string, args ...interface{}) {
-	w.l.Fatalf(ctx, msg, args...)
-}
-
-func (w *omitLogger) Log(ctx context.Context, level Level, args ...interface{}) {
-	w.l.Log(ctx, level, args...)
-}
-
-func (w *omitLogger) Logf(ctx context.Context, level Level, msg string, args ...interface{}) {
-	w.l.Logf(ctx, level, msg, args...)
-}
-
-func (w *omitLogger) String() string {
-	return w.l.String()
-}
-
-type omitWrapper struct{}
-
-func NewOmitWrapper() Wrapper {
-	return &omitWrapper{}
-}
-
-func getArgs(args []interface{}) []interface{} {
-	nargs := make([]interface{}, 0, len(args))
-	var err error
-	for _, arg := range args {
-		val := reflect.ValueOf(arg)
-		if val.Kind() == reflect.Ptr {
-			val = val.Elem()
-		}
-		narg := arg
-		if val.Kind() != reflect.Struct {
-			nargs = append(nargs, narg)
-			continue
-		}
-
-		if narg, err = rutil.Zero(arg); err != nil {
-			nargs = append(nargs, narg)
-			continue
-		}
-
-		rutil.CopyDefaults(narg, arg)
-		if flds, ferr := rutil.StructFields(narg); ferr == nil {
-			for _, fld := range flds {
-				if tv, ok := fld.Field.Tag.Lookup("logger"); ok && tv == "omit" {
-					fld.Value.Set(reflect.Zero(fld.Value.Type()))
-				}
-			}
-		}
-
-		nargs = append(nargs, narg)
-	}
-	return nargs
-}
-
-func (w *omitWrapper) Log(fn LogFunc) LogFunc {
-	return func(ctx context.Context, level Level, args ...interface{}) {
-		fn(ctx, level, getArgs(args)...)
-	}
-}
-
-func (w *omitWrapper) Logf(fn LogfFunc) LogfFunc {
-	return func(ctx context.Context, level Level, msg string, args ...interface{}) {
-		fn(ctx, level, msg, getArgs(args)...)
-	}
-}

logger/wrapper/wrapper.go

@@ -1,399 +0,0 @@
-// Package wrapper provides wrapper for Logger
-package wrapper
-
-import (
-	"context"
-	"fmt"
-
-	"go.unistack.org/micro/v3/client"
-	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v3/server"
-)
-
-var (
-	// DefaultClientCallObserver called by wrapper in client Call
-	DefaultClientCallObserver = func(ctx context.Context, req client.Request, rsp interface{}, opts []client.CallOption, err error) []string {
-		labels := []string{"service", req.Service(), "endpoint", req.Endpoint()}
-		if err != nil {
-			labels = append(labels, "error", err.Error())
-		}
-		return labels
-	}
-
-	// DefaultClientStreamObserver called by wrapper in client Stream
-	DefaultClientStreamObserver = func(ctx context.Context, req client.Request, opts []client.CallOption, stream client.Stream, err error) []string {
-		labels := []string{"service", req.Service(), "endpoint", req.Endpoint()}
-		if err != nil {
-			labels = append(labels, "error", err.Error())
-		}
-		return labels
-	}
-
-	// DefaultClientPublishObserver called by wrapper in client Publish
-	DefaultClientPublishObserver = func(ctx context.Context, msg client.Message, opts []client.PublishOption, err error) []string {
-		labels := []string{"endpoint", msg.Topic()}
-		if err != nil {
-			labels = append(labels, "error", err.Error())
-		}
-		return labels
-	}
-
-	// DefaultServerHandlerObserver called by wrapper in server Handler
-	DefaultServerHandlerObserver = func(ctx context.Context, req server.Request, rsp interface{}, err error) []string {
-		labels := []string{"service", req.Service(), "endpoint", req.Endpoint()}
-		if err != nil {
-			labels = append(labels, "error", err.Error())
-		}
-		return labels
-	}
-
-	// DefaultServerSubscriberObserver called by wrapper in server Subscriber
-	DefaultServerSubscriberObserver = func(ctx context.Context, msg server.Message, err error) []string {
-		labels := []string{"endpoint", msg.Topic()}
-		if err != nil {
-			labels = append(labels, "error", err.Error())
-		}
-		return labels
-	}
-
-	// DefaultClientCallFuncObserver called by wrapper in client CallFunc
-	DefaultClientCallFuncObserver = func(ctx context.Context, addr string, req client.Request, rsp interface{}, opts client.CallOptions, err error) []string {
-		labels := []string{"service", req.Service(), "endpoint", req.Endpoint()}
-		if err != nil {
-			labels = append(labels, "error", err.Error())
-		}
-		return labels
-	}
-
-	// DefaultSkipEndpoints wrapper not called for this endpoints
-	DefaultSkipEndpoints = []string{"Meter.Metrics", "Health.Live", "Health.Ready", "Health.Version"}
-)
-
-type lWrapper struct {
-	client.Client
-	serverHandler    server.HandlerFunc
-	serverSubscriber server.SubscriberFunc
-	clientCallFunc   client.CallFunc
-	opts             Options
-}
-
-type (
-	// ClientCallObserver func signature
-	ClientCallObserver func(context.Context, client.Request, interface{}, []client.CallOption, error) []string
-	// ClientStreamObserver func signature
-	ClientStreamObserver func(context.Context, client.Request, []client.CallOption, client.Stream, error) []string
-	// ClientPublishObserver func signature
-	ClientPublishObserver func(context.Context, client.Message, []client.PublishOption, error) []string
-	// ClientCallFuncObserver func signature
-	ClientCallFuncObserver func(context.Context, string, client.Request, interface{}, client.CallOptions, error) []string
-	// ServerHandlerObserver func signature
-	ServerHandlerObserver func(context.Context, server.Request, interface{}, error) []string
-	// ServerSubscriberObserver func signature
-	ServerSubscriberObserver func(context.Context, server.Message, error) []string
-)
-
-// Options struct for wrapper
-type Options struct {
-	// Logger that used for log
-	Logger logger.Logger
-	// ServerHandlerObservers funcs
-	ServerHandlerObservers []ServerHandlerObserver
-	// ServerSubscriberObservers funcs
-	ServerSubscriberObservers []ServerSubscriberObserver
-	// ClientCallObservers funcs
-	ClientCallObservers []ClientCallObserver
-	// ClientStreamObservers funcs
-	ClientStreamObservers []ClientStreamObserver
-	// ClientPublishObservers funcs
-	ClientPublishObservers []ClientPublishObserver
-	// ClientCallFuncObservers funcs
-	ClientCallFuncObservers []ClientCallFuncObserver
-	// SkipEndpoints
-	SkipEndpoints []string
-	// Level for logger
-	Level logger.Level
-	// Enabled flag
-	Enabled bool
-}
-
-// Option func signature
-type Option func(*Options)
-
-// NewOptions creates Options from Option slice
-func NewOptions(opts ...Option) Options {
-	options := Options{
-		Logger:                    logger.DefaultLogger,
-		Level:                     logger.TraceLevel,
-		ClientCallObservers:       []ClientCallObserver{DefaultClientCallObserver},
-		ClientStreamObservers:     []ClientStreamObserver{DefaultClientStreamObserver},
-		ClientPublishObservers:    []ClientPublishObserver{DefaultClientPublishObserver},
-		ClientCallFuncObservers:   []ClientCallFuncObserver{DefaultClientCallFuncObserver},
-		ServerHandlerObservers:    []ServerHandlerObserver{DefaultServerHandlerObserver},
-		ServerSubscriberObservers: []ServerSubscriberObserver{DefaultServerSubscriberObserver},
-		SkipEndpoints:             DefaultSkipEndpoints,
-	}
-
-	for _, o := range opts {
-		o(&options)
-	}
-
-	return options
-}
-
-// WithEnabled enable/diable flag
-func WithEnabled(b bool) Option {
-	return func(o *Options) {
-		o.Enabled = b
-	}
-}
-
-// WithLevel log level
-func WithLevel(l logger.Level) Option {
-	return func(o *Options) {
-		o.Level = l
-	}
-}
-
-// WithLogger logger
-func WithLogger(l logger.Logger) Option {
-	return func(o *Options) {
-		o.Logger = l
-	}
-}
-
-// WithClientCallObservers funcs
-func WithClientCallObservers(ob ...ClientCallObserver) Option {
-	return func(o *Options) {
-		o.ClientCallObservers = ob
-	}
-}
-
-// WithClientStreamObservers funcs
-func WithClientStreamObservers(ob ...ClientStreamObserver) Option {
-	return func(o *Options) {
-		o.ClientStreamObservers = ob
-	}
-}
-
-// WithClientPublishObservers funcs
-func WithClientPublishObservers(ob ...ClientPublishObserver) Option {
-	return func(o *Options) {
-		o.ClientPublishObservers = ob
-	}
-}
-
-// WithClientCallFuncObservers funcs
-func WithClientCallFuncObservers(ob ...ClientCallFuncObserver) Option {
-	return func(o *Options) {
-		o.ClientCallFuncObservers = ob
-	}
-}
-
-// WithServerHandlerObservers funcs
-func WithServerHandlerObservers(ob ...ServerHandlerObserver) Option {
-	return func(o *Options) {
-		o.ServerHandlerObservers = ob
-	}
-}
-
-// WithServerSubscriberObservers funcs
-func WithServerSubscriberObservers(ob ...ServerSubscriberObserver) Option {
-	return func(o *Options) {
-		o.ServerSubscriberObservers = ob
-	}
-}
-
-// SkipEndpoins
-func SkipEndpoints(eps ...string) Option {
-	return func(o *Options) {
-		o.SkipEndpoints = append(o.SkipEndpoints, eps...)
-	}
-}
-
-func (l *lWrapper) Call(ctx context.Context, req client.Request, rsp interface{}, opts ...client.CallOption) error {
-	err := l.Client.Call(ctx, req, rsp, opts...)
-
-	endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Endpoint())
-	for _, ep := range l.opts.SkipEndpoints {
-		if ep == endpoint {
-			return err
-		}
-	}
-
-	if !l.opts.Enabled {
-		return err
-	}
-
-	var labels []string
-	for _, o := range l.opts.ClientCallObservers {
-		labels = append(labels, o(ctx, req, rsp, opts, err)...)
-	}
-	l.opts.Logger.Fields(labels).Log(ctx, l.opts.Level)
-
-	return err
-}
-
-func (l *lWrapper) Stream(ctx context.Context, req client.Request, opts ...client.CallOption) (client.Stream, error) {
-	stream, err := l.Client.Stream(ctx, req, opts...)
-
-	endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Endpoint())
-	for _, ep := range l.opts.SkipEndpoints {
-		if ep == endpoint {
-			return stream, err
-		}
-	}
-
-	if !l.opts.Enabled {
-		return stream, err
-	}
-
-	var labels []string
-	for _, o := range l.opts.ClientStreamObservers {
-		labels = append(labels, o(ctx, req, opts, stream, err)...)
-	}
-	l.opts.Logger.Fields(labels).Log(ctx, l.opts.Level)
-
-	return stream, err
-}
-
-func (l *lWrapper) Publish(ctx context.Context, msg client.Message, opts ...client.PublishOption) error {
-	err := l.Client.Publish(ctx, msg, opts...)
-
-	endpoint := msg.Topic()
-	for _, ep := range l.opts.SkipEndpoints {
-		if ep == endpoint {
-			return err
-		}
-	}
-
-	if !l.opts.Enabled {
-		return err
-	}
-
-	var labels []string
-	for _, o := range l.opts.ClientPublishObservers {
-		labels = append(labels, o(ctx, msg, opts, err)...)
-	}
-	l.opts.Logger.Fields(labels).Log(ctx, l.opts.Level)
-
-	return err
-}
-
-func (l *lWrapper) ServerHandler(ctx context.Context, req server.Request, rsp interface{}) error {
-	err := l.serverHandler(ctx, req, rsp)
-
-	endpoint := req.Endpoint()
-	for _, ep := range l.opts.SkipEndpoints {
-		if ep == endpoint {
-			return err
-		}
-	}
-
-	if !l.opts.Enabled {
-		return err
-	}
-
-	var labels []string
-	for _, o := range l.opts.ServerHandlerObservers {
-		labels = append(labels, o(ctx, req, rsp, err)...)
-	}
-	l.opts.Logger.Fields(labels).Log(ctx, l.opts.Level)
-
-	return err
-}
-
-func (l *lWrapper) ServerSubscriber(ctx context.Context, msg server.Message) error {
-	err := l.serverSubscriber(ctx, msg)
-
-	endpoint := msg.Topic()
-	for _, ep := range l.opts.SkipEndpoints {
-		if ep == endpoint {
-			return err
-		}
-	}
-
-	if !l.opts.Enabled {
-		return err
-	}
-
-	var labels []string
-	for _, o := range l.opts.ServerSubscriberObservers {
-		labels = append(labels, o(ctx, msg, err)...)
-	}
-	l.opts.Logger.Fields(labels).Log(ctx, l.opts.Level)
-
-	return err
-}
-
-// NewClientWrapper accepts an open options and returns a Client Wrapper
-func NewClientWrapper(opts ...Option) client.Wrapper {
-	return func(c client.Client) client.Client {
-		options := NewOptions()
-		for _, o := range opts {
-			o(&options)
-		}
-		return &lWrapper{opts: options, Client: c}
-	}
-}
-
-// NewClientCallWrapper accepts an options and returns a Call Wrapper
-func NewClientCallWrapper(opts ...Option) client.CallWrapper {
-	return func(h client.CallFunc) client.CallFunc {
-		options := NewOptions()
-		for _, o := range opts {
-			o(&options)
-		}
-
-		l := &lWrapper{opts: options, clientCallFunc: h}
-		return l.ClientCallFunc
-	}
-}
-
-func (l *lWrapper) ClientCallFunc(ctx context.Context, addr string, req client.Request, rsp interface{}, opts client.CallOptions) error {
-	err := l.clientCallFunc(ctx, addr, req, rsp, opts)
-
-	endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Endpoint())
-	for _, ep := range l.opts.SkipEndpoints {
-		if ep == endpoint {
-			return err
-		}
-	}
-
-	if !l.opts.Enabled {
-		return err
-	}
-
-	var labels []string
-	for _, o := range l.opts.ClientCallFuncObservers {
-		labels = append(labels, o(ctx, addr, req, rsp, opts, err)...)
-	}
-	l.opts.Logger.Fields(labels).Log(ctx, l.opts.Level)
-
-	return err
-}
-
-// NewServerHandlerWrapper accepts an options and returns a Handler Wrapper
-func NewServerHandlerWrapper(opts ...Option) server.HandlerWrapper {
-	return func(h server.HandlerFunc) server.HandlerFunc {
-		options := NewOptions()
-		for _, o := range opts {
-			o(&options)
-		}
-
-		l := &lWrapper{opts: options, serverHandler: h}
-		return l.ServerHandler
-	}
-}
-
-// NewServerSubscriberWrapper accepts an options and returns a Subscriber Wrapper
-func NewServerSubscriberWrapper(opts ...Option) server.SubscriberWrapper {
-	return func(h server.SubscriberFunc) server.SubscriberFunc {
-		options := NewOptions()
-		for _, o := range opts {
-			o(&options)
-		}
-
-		l := &lWrapper{opts: options, serverSubscriber: h}
-		return l.ServerSubscriber
-	}
-}

metadata/context.go

@@ -17,11 +17,11 @@ func FromIncomingContext(ctx context.Context) (Metadata, bool) {
 	if ctx == nil {
 		return nil, false
 	}
-	md, ok := ctx.Value(mdIncomingKey{}).(*rawMetadata)
-	if !ok || md.md == nil {
+	md, ok := ctx.Value(mdIncomingKey{}).(Metadata)
+	if !ok || md == nil {
 		return nil, false
 	}
-	return md.md, ok
+	return md, ok
 }
 
 // FromOutgoingContext returns metadata from outgoing ctx
@@ -30,74 +30,41 @@ func FromOutgoingContext(ctx context.Context) (Metadata, bool) {
 	if ctx == nil {
 		return nil, false
 	}
-	md, ok := ctx.Value(mdOutgoingKey{}).(*rawMetadata)
-	if !ok || md.md == nil {
+	md, ok := ctx.Value(mdOutgoingKey{}).(Metadata)
+	if !ok || md == nil {
 		return nil, false
 	}
-	return md.md, ok
+	return md, ok
 }
 
 // FromContext returns metadata from the given context
 // returned metadata shoud not be modified or race condition happens
-//
-// Deprecated: use FromIncomingContext or FromOutgoingContext
 func FromContext(ctx context.Context) (Metadata, bool) {
 	if ctx == nil {
 		return nil, false
 	}
-	md, ok := ctx.Value(mdKey{}).(*rawMetadata)
-	if !ok || md.md == nil {
+	md, ok := ctx.Value(mdKey{}).(Metadata)
+	if !ok || md == nil {
 		return nil, false
 	}
-	return md.md, ok
+	return md, ok
 }
 
 // NewContext creates a new context with the given metadata
-//
-// Deprecated: use NewIncomingContext or NewOutgoingContext
 func NewContext(ctx context.Context, md Metadata) context.Context {
 	if ctx == nil {
 		ctx = context.Background()
 	}
-	ctx = context.WithValue(ctx, mdKey{}, &rawMetadata{md})
-	ctx = context.WithValue(ctx, mdIncomingKey{}, &rawMetadata{})
-	ctx = context.WithValue(ctx, mdOutgoingKey{}, &rawMetadata{})
+	ctx = context.WithValue(ctx, mdKey{}, md)
 	return ctx
 }
 
-// SetOutgoingContext modify outgoing context with given metadata
-func SetOutgoingContext(ctx context.Context, md Metadata) bool {
-	if ctx == nil {
-		return false
-	}
-	if omd, ok := ctx.Value(mdOutgoingKey{}).(*rawMetadata); ok {
-		omd.md = md
-		return true
-	}
-	return false
-}
-
-// SetIncomingContext modify incoming context with given metadata
-func SetIncomingContext(ctx context.Context, md Metadata) bool {
-	if ctx == nil {
-		return false
-	}
-	if omd, ok := ctx.Value(mdIncomingKey{}).(*rawMetadata); ok {
-		omd.md = md
-		return true
-	}
-	return false
-}
-
 // NewIncomingContext creates a new context with incoming metadata attached
 func NewIncomingContext(ctx context.Context, md Metadata) context.Context {
 	if ctx == nil {
 		ctx = context.Background()
 	}
-	ctx = context.WithValue(ctx, mdIncomingKey{}, &rawMetadata{md})
-	if v, ok := ctx.Value(mdOutgoingKey{}).(*rawMetadata); !ok || v == nil {
-		ctx = context.WithValue(ctx, mdOutgoingKey{}, &rawMetadata{})
-	}
+	ctx = context.WithValue(ctx, mdIncomingKey{}, md)
 	return ctx
 }
 
@@ -106,41 +73,28 @@ func NewOutgoingContext(ctx context.Context, md Metadata) context.Context {
 	if ctx == nil {
 		ctx = context.Background()
 	}
-	ctx = context.WithValue(ctx, mdOutgoingKey{}, &rawMetadata{md})
-	if v, ok := ctx.Value(mdIncomingKey{}).(*rawMetadata); !ok || v == nil {
-		ctx = context.WithValue(ctx, mdIncomingKey{}, &rawMetadata{})
-	}
+	ctx = context.WithValue(ctx, mdOutgoingKey{}, md)
 	return ctx
 }
 
 // AppendOutgoingContext apends new md to context
 func AppendOutgoingContext(ctx context.Context, kv ...string) context.Context {
-	md, ok := Pairs(kv...)
-	if !ok {
-		return ctx
-	}
+	md := Pairs(kv...)
 	omd, ok := FromOutgoingContext(ctx)
 	if !ok {
 		return NewOutgoingContext(ctx, md)
 	}
-	for k, v := range md {
-		omd.Set(k, v)
-	}
-	return NewOutgoingContext(ctx, omd)
+	nmd := Merge(omd, md, true)
+	return NewOutgoingContext(ctx, nmd)
 }
 
 // AppendIncomingContext apends new md to context
 func AppendIncomingContext(ctx context.Context, kv ...string) context.Context {
-	md, ok := Pairs(kv...)
-	if !ok {
-		return ctx
-	}
+	md := Pairs(kv...)
 	omd, ok := FromIncomingContext(ctx)
 	if !ok {
 		return NewIncomingContext(ctx, md)
 	}
-	for k, v := range md {
-		omd.Set(k, v)
-	}
-	return NewIncomingContext(ctx, omd)
+	nmd := Merge(omd, md, true)
+	return NewIncomingContext(ctx, nmd)
 }

metadata/context_test.go

@@ -24,7 +24,7 @@ func TestNewNilContext(t *testing.T) {
 }
 
 func TestFromContext(t *testing.T) {
-	ctx := context.WithValue(context.TODO(), mdKey{}, &rawMetadata{New(0)})
+	ctx := context.WithValue(context.TODO(), mdKey{}, New(0))
 
 	c, ok := FromContext(ctx)
 	if c == nil || !ok {
@@ -42,7 +42,7 @@ func TestNewContext(t *testing.T) {
 }
 
 func TestFromIncomingContext(t *testing.T) {
-	ctx := context.WithValue(context.TODO(), mdIncomingKey{}, &rawMetadata{New(0)})
+	ctx := context.WithValue(context.TODO(), mdIncomingKey{}, New(0))
 
 	c, ok := FromIncomingContext(ctx)
 	if c == nil || !ok {
@@ -51,7 +51,7 @@ func TestFromIncomingContext(t *testing.T) {
 }
 
 func TestFromOutgoingContext(t *testing.T) {
-	ctx := context.WithValue(context.TODO(), mdOutgoingKey{}, &rawMetadata{New(0)})
+	ctx := context.WithValue(context.TODO(), mdOutgoingKey{}, New(0))
 
 	c, ok := FromOutgoingContext(ctx)
 	if c == nil || !ok {
@@ -59,36 +59,6 @@ func TestFromOutgoingContext(t *testing.T) {
 	}
 }
 
-func TestSetIncomingContext(t *testing.T) {
-	md := New(1)
-	md.Set("key", "val")
-	ctx := context.WithValue(context.TODO(), mdIncomingKey{}, &rawMetadata{})
-	if !SetIncomingContext(ctx, md) {
-		t.Fatal("SetIncomingContext not works")
-	}
-	md, ok := FromIncomingContext(ctx)
-	if md == nil || !ok {
-		t.Fatal("SetIncomingContext not works")
-	} else if v, ok := md.Get("key"); !ok || v != "val" {
-		t.Fatal("SetIncomingContext not works")
-	}
-}
-
-func TestSetOutgoingContext(t *testing.T) {
-	md := New(1)
-	md.Set("key", "val")
-	ctx := context.WithValue(context.TODO(), mdOutgoingKey{}, &rawMetadata{})
-	if !SetOutgoingContext(ctx, md) {
-		t.Fatal("SetOutgoingContext not works")
-	}
-	md, ok := FromOutgoingContext(ctx)
-	if md == nil || !ok {
-		t.Fatal("SetOutgoingContext not works")
-	} else if v, ok := md.Get("key"); !ok || v != "val" {
-		t.Fatal("SetOutgoingContext not works")
-	}
-}
-
 func TestNewIncomingContext(t *testing.T) {
 	md := New(1)
 	md.Set("key", "val")

metadata/metadata.go

@@ -1,9 +1,9 @@
 // Package metadata is a way of defining message headers
-package metadata // import "go.unistack.org/micro/v3/metadata"
+package metadata
 
 import (
 	"net/textproto"
-	"sort"
+	"strings"
 )
 
 var (
@@ -19,50 +19,12 @@ var (
 	HeaderTimeout = "Micro-Timeout"
 	// HeaderAuthorization specifies Authorization header
 	HeaderAuthorization = "Authorization"
+	// HeaderXRequestID specifies request id
+	HeaderXRequestID = "X-Request-Id"
 )
 
 // Metadata is our way of representing request headers internally.
-// They're used at the RPC level and translate back and forth
-// from Transport headers.
-type Metadata map[string]string
-
-type rawMetadata struct {
-	md Metadata
-}
-
-// defaultMetadataSize used when need to init new Metadata
-var defaultMetadataSize = 2
-
-// Iterator used to iterate over metadata with order
-type Iterator struct {
-	md   Metadata
-	keys []string
-	cur  int
-	cnt  int
-}
-
-// Next advance iterator to next element
-func (iter *Iterator) Next(k, v *string) bool {
-	if iter.cur+1 > iter.cnt {
-		return false
-	}
-
-	*k = iter.keys[iter.cur]
-	*v = iter.md[*k]
-	iter.cur++
-	return true
-}
-
-// Iterator returns the itarator for metadata in sorted order
-func (md Metadata) Iterator() *Iterator {
-	iter := &Iterator{md: md, cnt: len(md)}
-	iter.keys = make([]string, 0, iter.cnt)
-	for k := range md {
-		iter.keys = append(iter.keys, k)
-	}
-	sort.Strings(iter.keys)
-	return iter
-}
+type Metadata map[string][]string
 
 // Get returns value from metadata by key
 func (md Metadata) Get(key string) (string, bool) {
@@ -72,7 +34,7 @@ func (md Metadata) Get(key string) (string, bool) {
 		// slow path
 		val, ok = md[textproto.CanonicalMIMEHeaderKey(key)]
 	}
-	return val, ok
+	return strings.Join(val, ","), ok
 }
 
 // Set is used to store value in metadata
@@ -81,10 +43,19 @@ func (md Metadata) Set(kv ...string) {
 		kv = kv[:len(kv)-1]
 	}
 	for idx := 0; idx < len(kv); idx += 2 {
-		md[textproto.CanonicalMIMEHeaderKey(kv[idx])] = kv[idx+1]
+		md[textproto.CanonicalMIMEHeaderKey(kv[idx])] = []string{kv[idx+1]}
 	}
 }
 
+// Append is used to append value in metadata
+func (md Metadata) Append(k string, v ...string) {
+	if len(v) == 0 {
+		return
+	}
+	k = textproto.CanonicalMIMEHeaderKey(k)
+	md[k] = append(md[k], v...)
+}
+
 // Del is used to remove value from metadata
 func (md Metadata) Del(keys ...string) {
 	for _, key := range keys {
@@ -96,46 +67,52 @@ func (md Metadata) Del(keys ...string) {
 }
 
 // Copy makes a copy of the metadata
-func Copy(md Metadata) Metadata {
-	nmd := New(len(md))
-	for key, val := range md {
-		nmd.Set(key, val)
+func Copy(md Metadata, exclude ...string) Metadata {
+	nmd := make(Metadata, len(md))
+	for k, v := range md {
+		nmd[k] = v
 	}
+	nmd.Del(exclude...)
 	return nmd
 }
 
 // New return new sized metadata
 func New(size int) Metadata {
 	if size == 0 {
-		size = defaultMetadataSize
+		size = 2
 	}
 	return make(Metadata, size)
 }
 
 // Merge merges metadata to existing metadata, overwriting if specified
 func Merge(omd Metadata, mmd Metadata, overwrite bool) Metadata {
-	var ok bool
 	nmd := Copy(omd)
 	for key, val := range mmd {
-		_, ok = nmd[key]
+		nval, ok := nmd[key]
 		switch {
+		case ok && overwrite:
+			nmd[key] = nval
+			continue
 		case ok && !overwrite:
 			continue
-		case val != "":
-			nmd.Set(key, val)
-		case ok && val == "":
-			nmd.Del(key)
+		case !ok:
+			for _, v := range val {
+				if v != "" {
+					nval = append(nval, v)
+				}
+			}
+			nmd[key] = nval
 		}
 	}
 	return nmd
 }
 
 // Pairs from which metadata created
-func Pairs(kv ...string) (Metadata, bool) {
+func Pairs(kv ...string) Metadata {
 	if len(kv)%2 == 1 {
-		return nil, false
+		kv = kv[:len(kv)-1]
 	}
-	md := New(len(kv) / 2)
+	md := make(Metadata, len(kv)/2)
 	md.Set(kv...)
-	return md, true
+	return md
 }

metadata/metadata_test.go

@@ -33,30 +33,52 @@ func TestAppend(t *testing.T) {
 }
 
 func TestPairs(t *testing.T) {
-	md, ok := Pairs("key1", "val1", "key2", "val2")
-	if !ok {
-		t.Fatal("odd number of kv")
-	}
-	if _, ok = md.Get("key1"); !ok {
+	md := Pairs("key1", "val1", "key2", "val2")
+
+	if _, ok := md.Get("key1"); !ok {
 		t.Fatal("key1 not found")
 	}
 }
 
-func testCtx(ctx context.Context) {
-	md := New(2)
+func testIncomingCtx(ctx context.Context) {
+	if md, ok := FromIncomingContext(ctx); ok && md != nil {
 		md.Set("Key1", "Val1_new")
 		md.Set("Key3", "Val3")
-	SetOutgoingContext(ctx, md)
+	}
 }
 
-func TestPassing(t *testing.T) {
+func testOutgoingCtx(ctx context.Context) {
+	if md, ok := FromOutgoingContext(ctx); ok && md != nil {
+		md.Set("Key1", "Val1_new")
+		md.Set("Key3", "Val3")
+	}
+}
+
+func TestIncoming(t *testing.T) {
 	ctx := context.TODO()
 	md1 := New(2)
 	md1.Set("Key1", "Val1")
 	md1.Set("Key2", "Val2")
 
 	ctx = NewIncomingContext(ctx, md1)
-	testCtx(ctx)
+	testIncomingCtx(ctx)
+	md, ok := FromIncomingContext(ctx)
+	if !ok {
+		t.Fatalf("missing metadata from incoming context")
+	}
+	if v, ok := md.Get("Key1"); !ok || v != "Val1_new" {
+		t.Fatalf("invalid metadata value %#+v", md)
+	}
+}
+
+func TestOutgoing(t *testing.T) {
+	ctx := context.TODO()
+	md1 := New(2)
+	md1.Set("Key1", "Val1")
+	md1.Set("Key2", "Val2")
+
+	ctx = NewOutgoingContext(ctx, md1)
+	testOutgoingCtx(ctx)
 	md, ok := FromOutgoingContext(ctx)
 	if !ok {
 		t.Fatalf("missing metadata from outgoing context")
@@ -68,10 +90,10 @@ func TestPassing(t *testing.T) {
 
 func TestMerge(t *testing.T) {
 	omd := Metadata{
-		"key1": "val1",
+		"key1": []string{"val1"},
 	}
 	mmd := Metadata{
-		"key2": "val2",
+		"key2": []string{"val2"},
 	}
 
 	nmd := Merge(omd, mmd, true)
@@ -80,21 +102,6 @@ func TestMerge(t *testing.T) {
 	}
 }
 
-func TestIterator(t *testing.T) {
-	md := Metadata{
-		"1Last":   "last",
-		"2First":  "first",
-		"3Second": "second",
-	}
-
-	iter := md.Iterator()
-	var k, v string
-
-	for iter.Next(&k, &v) {
-		// fmt.Printf("k: %s, v: %s\n", k, v)
-	}
-}
-
 func TestMedataCanonicalKey(t *testing.T) {
 	md := New(1)
 	md.Set("x-request-id", "12345")
@@ -134,10 +141,7 @@ func TestMetadataSet(t *testing.T) {
 }
 
 func TestMetadataDelete(t *testing.T) {
-	md := Metadata{
-		"Foo": "bar",
-		"Baz": "empty",
-	}
+	md := Pairs("Foo", "bar", "Baz", "empty")
 
 	md.Del("Baz")
 	_, ok := md.Get("Baz")
@@ -156,24 +160,19 @@ func TestNilContext(t *testing.T) {
 }
 
 func TestMetadataCopy(t *testing.T) {
-	md := Metadata{
-		"Foo": "bar",
-		"Bar": "baz",
-	}
+	md := Pairs("Foo", "bar", "Bar", "baz")
 
 	cp := Copy(md)
 
 	for k, v := range md {
-		if cv := cp[k]; cv != v {
+		if cv := cp[k]; len(cv) != len(v) {
 			t.Fatalf("Got %s:%s for %s:%s", k, cv, k, v)
 		}
 	}
 }
 
 func TestMetadataContext(t *testing.T) {
-	md := Metadata{
-		"Foo": "bar",
-	}
+	md := Pairs("Foo", "bar")
 
 	ctx := NewContext(context.TODO(), md)
 
@@ -182,7 +181,7 @@ func TestMetadataContext(t *testing.T) {
 		t.Errorf("Unexpected error retrieving metadata, got %t", ok)
 	}
 
-	if emd["Foo"] != md["Foo"] {
+	if len(emd["Foo"]) != len(md["Foo"]) {
 		t.Errorf("Expected key: %s val: %s, got key: %s val: %s", "Foo", md["Foo"], "Foo", emd["Foo"])
 	}
 
@@ -190,3 +189,14 @@ func TestMetadataContext(t *testing.T) {
 		t.Errorf("Expected metadata length 1 got %d", i)
 	}
 }
+
+func TestCopy(t *testing.T) {
+	md := New(2)
+	md.Set("key1", "val1", "key2", "val2")
+	nmd := Copy(md, "key2")
+	if len(nmd) != 1 {
+		t.Fatal("Copy exclude not works")
+	} else if nmd["Key1"][0] != "val1" {
+		t.Fatal("Copy exclude not works")
+	}
+}

meter/context.go

@@ -22,13 +22,3 @@ func NewContext(ctx context.Context, c Meter) context.Context {
 	}
 	return context.WithValue(ctx, meterKey{}, c)
 }
-
-// SetOption returns a function to setup a context with given value
-func SetOption(k, v interface{}) Option {
-	return func(o *Options) {
-		if o.Context == nil {
-			o.Context = context.Background()
-		}
-		o.Context = context.WithValue(o.Context, k, v)
-	}
-}

meter/context_test.go

@@ -40,14 +40,3 @@ func TestNewContext(t *testing.T) {
 		t.Fatal("NewContext not works")
 	}
 }
-
-func TestSetOption(t *testing.T) {
-	type key struct{}
-	o := SetOption(key{}, "test")
-	opts := &Options{}
-	o(opts)
-
-	if v, ok := opts.Context.Value(key{}).(string); !ok || v == "" {
-		t.Fatal("SetOption not works")
-	}
-}

meter/generate.go

@@ -1,12 +0,0 @@
-package meter
-
-//go:generate sh -c "protoc -I./handler -I../ -I$(go list -f '{{ .Dir }}' -m go.unistack.org/micro-proto/v3) --go-micro_out='components=micro|http|server',standalone=false,debug=true,paths=source_relative:./handler handler/handler.proto"
-
-import (
-
-	// import required packages
-	_ "go.unistack.org/micro-proto/v3/api"
-
-	// import required packages
-	_ "go.unistack.org/micro-proto/v3/openapiv3"
-)

meter/handler/handler.go

@@ -1,67 +0,0 @@
-package handler // import "go.unistack.org/micro/v3/meter/handler"
-
-import (
-	"bytes"
-	"context"
-
-	"go.unistack.org/micro/v3/codec"
-	"go.unistack.org/micro/v3/errors"
-	"go.unistack.org/micro/v3/meter"
-)
-
-// guard to fail early
-var _ MeterServer = &Handler{}
-
-type Handler struct {
-	opts Options
-}
-
-type Option func(*Options)
-
-type Options struct {
-	Meter        meter.Meter
-	Name         string
-	MeterOptions []meter.Option
-}
-
-func Meter(m meter.Meter) Option {
-	return func(o *Options) {
-		o.Meter = m
-	}
-}
-
-func Name(name string) Option {
-	return func(o *Options) {
-		o.Name = name
-	}
-}
-
-func MeterOptions(opts ...meter.Option) Option {
-	return func(o *Options) {
-		o.MeterOptions = append(o.MeterOptions, opts...)
-	}
-}
-
-func NewOptions(opts ...Option) Options {
-	options := Options{Meter: meter.DefaultMeter}
-	for _, o := range opts {
-		o(&options)
-	}
-	return options
-}
-
-func NewHandler(opts ...Option) *Handler {
-	options := NewOptions(opts...)
-	return &Handler{opts: options}
-}
-
-func (h *Handler) Metrics(ctx context.Context, req *codec.Frame, rsp *codec.Frame) error {
-	buf := bytes.NewBuffer(nil)
-	if err := h.opts.Meter.Write(buf, h.opts.MeterOptions...); err != nil {
-		return errors.InternalServerError(h.opts.Name, "%v", err)
-	}
-
-	rsp.Data = buf.Bytes()
-
-	return nil
-}

meter/handler/handler.proto

@@ -1,24 +0,0 @@
-syntax = "proto3";
-
-package micro.meter.handler;
-option go_package = "go.unistack.org/micro/v3/meter/handler;handler";
-
-import "api/annotations.proto";
-import "openapiv3/annotations.proto";
-import "codec/frame.proto";
-
-service Meter {
-	rpc Metrics(micro.codec.Frame) returns (micro.codec.Frame) {
-		option (micro.openapiv3.openapiv3_operation) = {
-      operation_id: "Metrics";
-      responses: {
-        default: {
-          reference: {
-            _ref: "micro.codec.Frame";
-          };
-        };
-      };
-    };
-		option (micro.api.http) = { get: "/metrics"; };
-  };
-};

meter/handler/handler_micro.pb.go

@@ -1,32 +0,0 @@
-// Code generated by protoc-gen-go-micro. DO NOT EDIT.
-// protoc-gen-go-micro version: v3.5.3
-// source: handler.proto
-
-package handler
-
-import (
-	context "context"
-	api "go.unistack.org/micro/v3/api"
-	codec "go.unistack.org/micro/v3/codec"
-)
-
-var (
-	MeterName = "Meter"
-
-	MeterEndpoints = []api.Endpoint{
-		{
-			Name:    "Meter.Metrics",
-			Path:    []string{"/metrics"},
-			Method:  []string{"GET"},
-			Handler: "rpc",
-		},
-	}
-)
-
-func NewMeterEndpoints() []api.Endpoint {
-	return MeterEndpoints
-}
-
-type MeterServer interface {
-	Metrics(ctx context.Context, req *codec.Frame, rsp *codec.Frame) error
-}

meter/handler/handler_micro_http.pb.go

@@ -1,35 +0,0 @@
-// Code generated by protoc-gen-go-micro. DO NOT EDIT.
-// protoc-gen-go-micro version: v3.5.3
-// source: handler.proto
-
-package handler
-
-import (
-	context "context"
-	api "go.unistack.org/micro/v3/api"
-	codec "go.unistack.org/micro/v3/codec"
-	server "go.unistack.org/micro/v3/server"
-)
-
-type meterServer struct {
-	MeterServer
-}
-
-func (h *meterServer) Metrics(ctx context.Context, req *codec.Frame, rsp *codec.Frame) error {
-	return h.MeterServer.Metrics(ctx, req, rsp)
-}
-
-func RegisterMeterServer(s server.Server, sh MeterServer, opts ...server.HandlerOption) error {
-	type meter interface {
-		Metrics(ctx context.Context, req *codec.Frame, rsp *codec.Frame) error
-	}
-	type Meter struct {
-		meter
-	}
-	h := &meterServer{sh}
-	var nopts []server.HandlerOption
-	for _, endpoint := range MeterEndpoints {
-		nopts = append(nopts, api.WithEndpoint(&endpoint))
-	}
-	return s.Handle(s.NewHandler(&Meter{h}, append(nopts, opts...)...))
-}

meter/meter.go

@@ -1,5 +1,5 @@
 // Package meter is for instrumentation
-package meter // import "go.unistack.org/micro/v3/meter"
+package meter // import "go.unistack.org/micro/v4/meter"
 
 import (
 	"io"
@@ -7,6 +7,8 @@ import (
 	"strconv"
 	"strings"
 	"time"
+
+	"go.unistack.org/micro/v4/options"
 )
 
 var (
@@ -31,9 +33,9 @@ type Meter interface {
 	// Name returns meter name
 	Name() string
 	// Init initialize meter
-	Init(opts ...Option) error
+	Init(opts ...options.Option) error
 	// Clone create meter copy with new options
-	Clone(opts ...Option) Meter
+	Clone(opts ...options.Option) Meter
 	// Counter get or create counter
 	Counter(name string, labels ...string) Counter
 	// FloatCounter get or create float counter
@@ -41,7 +43,7 @@ type Meter interface {
 	// Gauge get or create gauge
 	Gauge(name string, fn func() float64, labels ...string) Gauge
 	// Set create new meter metrics set
-	Set(opts ...Option) Meter
+	Set(opts ...options.Option) Meter
 	// Histogram get or create histogram
 	Histogram(name string, labels ...string) Histogram
 	// Summary get or create summary
@@ -49,7 +51,7 @@ type Meter interface {
 	// SummaryExt get or create summary with spcified quantiles and window time
 	SummaryExt(name string, window time.Duration, quantiles []float64, labels ...string) Summary
 	// Write writes metrics to io.Writer
-	Write(w io.Writer, opts ...Option) error
+	Write(w io.Writer, opts ...options.Option) error
 	// Options returns meter options
 	Options() Options
 	// String return meter type

meter/noop.go

@@ -3,6 +3,8 @@ package meter
 import (
 	"io"
 	"time"
+
+	"go.unistack.org/micro/v4/options"
 )
 
 // NoopMeter is an noop implementation of Meter
@@ -11,12 +13,12 @@ type noopMeter struct {
 }
 
 // NewMeter returns a configured noop reporter:
-func NewMeter(opts ...Option) Meter {
+func NewMeter(opts ...options.Option) Meter {
 	return &noopMeter{opts: NewOptions(opts...)}
 }
 
 // Clone return old meter with new options
-func (r *noopMeter) Clone(opts ...Option) Meter {
+func (r *noopMeter) Clone(opts ...options.Option) Meter {
 	options := r.opts
 	for _, o := range opts {
 		o(&options)
@@ -29,7 +31,7 @@ func (r *noopMeter) Name() string {
 }
 
 // Init initialize options
-func (r *noopMeter) Init(opts ...Option) error {
+func (r *noopMeter) Init(opts ...options.Option) error {
 	for _, o := range opts {
 		o(&r.opts)
 	}
@@ -67,7 +69,7 @@ func (r *noopMeter) Histogram(name string, labels ...string) Histogram {
 }
 
 // Set implements the Meter interface
-func (r *noopMeter) Set(opts ...Option) Meter {
+func (r *noopMeter) Set(opts ...options.Option) Meter {
 	m := &noopMeter{opts: r.opts}
 
 	for _, o := range opts {
@@ -77,7 +79,7 @@ func (r *noopMeter) Set(opts ...Option) Meter {
 	return m
 }
 
-func (r *noopMeter) Write(w io.Writer, opts ...Option) error {
+func (r *noopMeter) Write(_ io.Writer, _ ...options.Option) error {
 	return nil
 }