initial stuff for wrappers

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

.gitea/ISSUE_TEMPLATE/bug_report.md

@@ -1,18 +0,0 @@
----
-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

@@ -1,17 +0,0 @@
----
-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

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

.gitea/autoapprove.yml

@@ -1,28 +0,0 @@
-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/workflows/job_coverage.yml

@@ -1,51 +0,0 @@
-name: coverage
-
-on:
-  push:
-    branches: [ main, v3, v4 ]
-  pull_request:
-    branches: [ main, v3, v4 ]
-  # Allows you to run this workflow manually from the Actions tab
-  workflow_dispatch:
-
-jobs:
-
-  build:
-    runs-on: ubuntu-latest
-    steps:
-    - name: checkout code
-      uses: actions/checkout@v4
-      with:
-        filter: 'blob:none'
-
-    - name: setup go
-      uses: actions/setup-go@v5
-      with:
-        cache-dependency-path: "**/*.sum"
-        go-version: 'stable' 
-
-    - name: test coverage
-      run: |
-        go test -v -cover ./... -coverprofile coverage.out -coverpkg ./...
-        go tool cover -func coverage.out -o coverage.out
-
-    - name: coverage badge
-      uses: tj-actions/coverage-badge-go@v1
-      with:
-        green: 80
-        filename: coverage.out
-
-    - uses: stefanzweifel/git-auto-commit-action@v4
-      id: auto-commit-action
-      with:
-        commit_message: Apply Code Coverage Badge
-        skip_fetch: true
-        skip_checkout: true
-        file_pattern: ./README.md
-
-    - name: Push Changes
-      if: steps.auto-commit-action.outputs.changes_detected == 'true'
-      uses: ad-m/github-push-action@master
-      with:
-        github_token: ${{ github.token }}
-        branch: ${{ github.ref }}

.gitea/workflows/job_lint.yml

@@ -1,29 +0,0 @@
-name: lint
-
-on:
-  pull_request:
-    types: [opened, reopened, synchronize]
-    branches:
-    - master
-    - v3
-    - v4
-
-jobs:
-  lint:
-    runs-on: ubuntu-latest
-    steps:
-    - name: checkout code
-      uses: actions/checkout@v4
-      with:
-        filter: 'blob:none'
-    - name: setup go
-      uses: actions/setup-go@v5
-      with:
-        cache-dependency-path: "**/*.sum"
-        go-version: 'stable' 
-    - name: setup deps
-      run: go get -v ./...
-    - name: run lint
-      uses: https://github.com/golangci/golangci-lint-action@v6
-      with:
-        version: 'latest'

.gitea/workflows/job_test.yml

@@ -1,34 +0,0 @@
-name: test
-
-on:
-  pull_request:
-    types: [opened, reopened, synchronize]
-    branches:
-    - master
-    - v3
-    - v4
-  push:
-    branches:
-    - master
-    - v3
-    - v4
-
-jobs:
-  test:
-    runs-on: ubuntu-latest
-    steps:
-    - name: checkout code
-      uses: actions/checkout@v4
-      with:
-        filter: 'blob:none'
-    - name: setup go
-      uses: actions/setup-go@v5
-      with:
-        cache-dependency-path: "**/*.sum"
-        go-version: 'stable'
-    - name: setup deps
-      run: go get -v ./...
-    - name: run test
-      env:
-        INTEGRATION_TESTS: yes
-      run: go test -mod readonly -v ./...

.gitea/workflows/job_tests.yml

@@ -1,53 +0,0 @@
-name: test
-
-on:
-  pull_request:
-    types: [opened, reopened, synchronize]
-    branches:
-    - master
-    - v3
-    - v4
-  push:
-    branches:
-    - master
-    - v3
-    - v4
-
-jobs:
-  test:
-    runs-on: ubuntu-latest
-    steps:
-    - name: checkout code
-      uses: actions/checkout@v4
-      with:
-        filter: 'blob:none'
-    - name: checkout tests
-      uses: actions/checkout@v4
-      with:
-        ref: master
-        filter: 'blob:none'
-        repository: unistack-org/micro-tests
-        path: micro-tests
-    - name: setup go
-      uses: actions/setup-go@v5
-      with:
-        cache-dependency-path: "**/*.sum"
-        go-version: 'stable'
-    - name: setup go work
-      env:
-        GOWORK: /workspace/${{ github.repository_owner }}/go.work
-      run: |
-        go work init
-        go work use .
-        go work use micro-tests
-    - name: setup deps
-      env:
-        GOWORK: /workspace/${{ github.repository_owner }}/go.work
-      run: go get -v ./...
-    - name: run tests
-      env:
-        INTEGRATION_TESTS: yes
-        GOWORK: /workspace/${{ github.repository_owner }}/go.work
-      run: |
-        cd micro-tests
-        go test -mod readonly -v ./... || true

.github.old/PULL_REQUEST_TEMPLATE.md

@@ -1,9 +0,0 @@
-## 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/workflows/build.yml

@@ -34,7 +34,7 @@ jobs:
       - name: checkout
         uses: actions/checkout@v3
       - name: lint
-        uses: golangci/golangci-lint-action@v3.4.0
+        uses: golangci/golangci-lint-action@v3.3.1
         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/workflows/dependabot-automerge.yml

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

.github/workflows/pr.yml

@@ -34,7 +34,14 @@ jobs:
       - name: checkout
         uses: actions/checkout@v3
       - name: lint
-        uses: golangci/golangci-lint-action@v3.4.0
+        uses: golangci/golangci-lint-action@v3.3.1
         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

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

.golangci.yml

@@ -1,5 +1,44 @@
 run:
-  concurrency: 8
+  concurrency: 4
   deadline: 5m
   issues-exit-code: 1
   tests: true
+
+linters-settings:
+  govet:
+    check-shadowing: true
+    enable:
+      - fieldalignment
+
+linters:
+  enable:
+    - govet
+    - deadcode
+    - errcheck
+    - govet
+    - ineffassign
+    - staticcheck
+    - structcheck
+    - typecheck
+    - unused
+    - varcheck
+    - bodyclose
+    - gci
+    - goconst
+    - gocritic
+    - gosimple
+    - gofmt
+    - gofumpt
+    - goimports
+    - revive
+    - gosec
+    - makezero
+    - misspell
+    - nakedret
+    - nestif
+    - nilerr
+    - noctx
+    - prealloc
+    - unconvert
+    - unparam
+  disable-all: false

README.md

@@ -1,5 +1,4 @@
-# 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/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)
-[![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://git.unistack.org/unistack-org/micro/actions/workflows/job_tests.yml/badge.svg?branch=v3)](https://git.unistack.org/unistack-org/micro/actions?query=workflow%3Abuild+branch%3Av3+event%3Apush) [![Lint](https://goreportcard.com/badge/go.unistack.org/micro/v3)](https://goreportcard.com/report/go.unistack.org/micro/v3)![Coverage](https://img.shields.io/badge/Coverage-44.9%25-yellow)
 
 Micro is a standard library for microservices.
 

api/api.go

@@ -0,0 +1,182 @@
+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

@@ -0,0 +1,245 @@
+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

@@ -1,25 +1,21 @@
 // Package broker is an interface used for asynchronous messaging
-package broker
+package broker // import "go.unistack.org/micro/v3/broker"
 
 import (
 	"context"
 	"errors"
-	"time"
 
-	"go.unistack.org/micro/v3/codec"
 	"go.unistack.org/micro/v3/metadata"
 )
 
 // DefaultBroker default memory broker
-var DefaultBroker Broker = NewBroker()
+var DefaultBroker = 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")
-	// DefaultGracefulTimeout
-	DefaultGracefulTimeout = 5 * time.Second
 )
 
 // Broker is an interface used for asynchronous messaging.
@@ -46,25 +42,8 @@ type Broker interface {
 	BatchSubscribe(ctx context.Context, topic string, h BatchHandler, opts ...SubscribeOption) (Subscriber, error)
 	// String type of broker
 	String() string
-	// Live returns broker liveness
-	Live() bool
-	// Ready returns broker readiness
-	Ready() bool
-	// Health returns broker health
-	Health() bool
 }
 
-type (
-	FuncPublish        func(ctx context.Context, topic string, msg *Message, opts ...PublishOption) error
-	HookPublish        func(next FuncPublish) FuncPublish
-	FuncBatchPublish   func(ctx context.Context, msgs []*Message, opts ...PublishOption) error
-	HookBatchPublish   func(next FuncBatchPublish) FuncBatchPublish
-	FuncSubscribe      func(ctx context.Context, topic string, h Handler, opts ...SubscribeOption) (Subscriber, error)
-	HookSubscribe      func(next FuncSubscribe) FuncSubscribe
-	FuncBatchSubscribe func(ctx context.Context, topic string, h BatchHandler, opts ...SubscribeOption) (Subscriber, error)
-	HookBatchSubscribe func(next FuncBatchSubscribe) FuncBatchSubscribe
-)
-
 // Handler is used to process messages via a subscription of a topic.
 type Handler func(Event) error
 
@@ -94,8 +73,6 @@ type BatchHandler func(Events) error
 
 // Event is given to a subscription handler for processing
 type Event interface {
-	// Context return context.Context for event
-	Context() context.Context
 	// Topic returns event topic
 	Topic() string
 	// Message returns broker message
@@ -108,12 +85,33 @@ type Event interface {
 	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 codec.RawMessage
+	Body RawMessage
 }
 
 // NewMessage create broker message with topic filled

broker/context.go

@@ -15,15 +15,6 @@ func FromContext(ctx context.Context) (Broker, bool) {
 	return c, ok
 }
 
-// MustContext returns broker from passed context
-func MustContext(ctx context.Context) Broker {
-	b, ok := FromContext(ctx)
-	if !ok {
-		panic("missing broker")
-	}
-	return b
-}
-
 // NewContext savess broker in context
 func NewContext(ctx context.Context, s Broker) context.Context {
 	if ctx == nil {

broker/memory.go

@@ -4,10 +4,8 @@ import (
 	"context"
 	"sync"
 
-	"go.unistack.org/micro/v3/broker"
 	"go.unistack.org/micro/v3/logger"
 	"go.unistack.org/micro/v3/metadata"
-	"go.unistack.org/micro/v3/options"
 	maddr "go.unistack.org/micro/v3/util/addr"
 	"go.unistack.org/micro/v3/util/id"
 	mnet "go.unistack.org/micro/v3/util/net"
@@ -15,13 +13,9 @@ import (
 )
 
 type memoryBroker struct {
-	funcPublish        broker.FuncPublish
+	subscribers map[string][]*memorySubscriber
-	funcBatchPublish   broker.FuncBatchPublish
+	addr        string
-	funcSubscribe      broker.FuncSubscribe
+	opts        Options
-	funcBatchSubscribe broker.FuncBatchSubscribe
-	subscribers        map[string][]*memorySubscriber
-	addr               string
-	opts               broker.Options
 	sync.RWMutex
 	connected bool
 }
@@ -30,20 +24,20 @@ type memoryEvent struct {
 	err     error
 	message interface{}
 	topic   string
-	opts    broker.Options
+	opts    Options
 }
 
 type memorySubscriber struct {
 	ctx          context.Context
 	exit         chan bool
-	handler      broker.Handler
+	handler      Handler
-	batchhandler broker.BatchHandler
+	batchhandler BatchHandler
 	id           string
 	topic        string
-	opts         broker.SubscribeOptions
+	opts         SubscribeOptions
 }
 
-func (m *memoryBroker) Options() broker.Options {
+func (m *memoryBroker) Options() Options {
 	return m.opts
 }
 
@@ -52,12 +46,6 @@ func (m *memoryBroker) Address() string {
 }
 
 func (m *memoryBroker) Connect(ctx context.Context) error {
-	select {
-	case <-ctx.Done():
-		return ctx.Err()
-	default:
-	}
-
 	m.Lock()
 	defer m.Unlock()
 
@@ -82,12 +70,6 @@ func (m *memoryBroker) Connect(ctx context.Context) error {
 }
 
 func (m *memoryBroker) Disconnect(ctx context.Context) error {
-	select {
-	case <-ctx.Done():
-		return ctx.Err()
-	default:
-	}
-
 	m.Lock()
 	defer m.Unlock()
 
@@ -99,54 +81,27 @@ func (m *memoryBroker) Disconnect(ctx context.Context) error {
 	return nil
 }
 
-func (m *memoryBroker) Init(opts ...broker.Option) error {
+func (m *memoryBroker) Init(opts ...Option) error {
 	for _, o := range opts {
 		o(&m.opts)
 	}
-
-	m.funcPublish = m.fnPublish
-	m.funcBatchPublish = m.fnBatchPublish
-	m.funcSubscribe = m.fnSubscribe
-	m.funcBatchSubscribe = m.fnBatchSubscribe
-
-	m.opts.Hooks.EachPrev(func(hook options.Hook) {
-		switch h := hook.(type) {
-		case broker.HookPublish:
-			m.funcPublish = h(m.funcPublish)
-		case broker.HookBatchPublish:
-			m.funcBatchPublish = h(m.funcBatchPublish)
-		case broker.HookSubscribe:
-			m.funcSubscribe = h(m.funcSubscribe)
-		case broker.HookBatchSubscribe:
-			m.funcBatchSubscribe = h(m.funcBatchSubscribe)
-		}
-	})
-
 	return nil
 }
 
-func (m *memoryBroker) Publish(ctx context.Context, topic string, msg *broker.Message, opts ...broker.PublishOption) error {
+func (m *memoryBroker) Publish(ctx context.Context, topic string, msg *Message, opts ...PublishOption) error {
-	return m.funcPublish(ctx, topic, msg, opts...)
-}
-
-func (m *memoryBroker) fnPublish(ctx context.Context, topic string, msg *broker.Message, opts ...broker.PublishOption) error {
 	msg.Header.Set(metadata.HeaderTopic, topic)
-	return m.publish(ctx, []*broker.Message{msg}, opts...)
+	return m.publish(ctx, []*Message{msg}, opts...)
 }
 
-func (m *memoryBroker) BatchPublish(ctx context.Context, msgs []*broker.Message, opts ...broker.PublishOption) error {
+func (m *memoryBroker) BatchPublish(ctx context.Context, msgs []*Message, opts ...PublishOption) error {
-	return m.funcBatchPublish(ctx, msgs, opts...)
-}
-
-func (m *memoryBroker) fnBatchPublish(ctx context.Context, msgs []*broker.Message, opts ...broker.PublishOption) error {
 	return m.publish(ctx, msgs, opts...)
 }
 
-func (m *memoryBroker) publish(ctx context.Context, msgs []*broker.Message, opts ...broker.PublishOption) error {
+func (m *memoryBroker) publish(ctx context.Context, msgs []*Message, opts ...PublishOption) error {
 	m.RLock()
 	if !m.connected {
 		m.RUnlock()
-		return broker.ErrNotConnected
+		return ErrNotConnected
 	}
 	m.RUnlock()
 
@@ -156,9 +111,9 @@ func (m *memoryBroker) publish(ctx context.Context, msgs []*broker.Message, opts
 	case <-ctx.Done():
 		return ctx.Err()
 	default:
-		options := broker.NewPublishOptions(opts...)
+		options := NewPublishOptions(opts...)
 
-		msgTopicMap := make(map[string]broker.Events)
+		msgTopicMap := make(map[string]Events)
 		for _, v := range msgs {
 			p := &memoryEvent{opts: m.opts}
 
@@ -206,7 +161,7 @@ func (m *memoryBroker) publish(ctx context.Context, msgs []*broker.Message, opts
 						}
 					} else if sub.opts.AutoAck {
 						if err = ms.Ack(); err != nil {
-							m.opts.Logger.Error(m.opts.Context, "broker ack error", err)
+							m.opts.Logger.Errorf(m.opts.Context, "ack failed: %v", err)
 						}
 					}
 					// single processing
@@ -217,11 +172,11 @@ func (m *memoryBroker) publish(ctx context.Context, msgs []*broker.Message, opts
 							if eh != nil {
 								_ = eh(p)
 							} else if m.opts.Logger.V(logger.ErrorLevel) {
-								m.opts.Logger.Error(m.opts.Context, "broker handler error", err)
+								m.opts.Logger.Error(m.opts.Context, err.Error())
 							}
 						} else if sub.opts.AutoAck {
 							if err = p.Ack(); err != nil {
-								m.opts.Logger.Error(m.opts.Context, "broker ack error", err)
+								m.opts.Logger.Errorf(m.opts.Context, "ack failed: %v", err)
 							}
 						}
 					}
@@ -233,15 +188,11 @@ func (m *memoryBroker) publish(ctx context.Context, msgs []*broker.Message, opts
 	return nil
 }
 
-func (m *memoryBroker) BatchSubscribe(ctx context.Context, topic string, handler broker.BatchHandler, opts ...broker.SubscribeOption) (broker.Subscriber, error) {
+func (m *memoryBroker) BatchSubscribe(ctx context.Context, topic string, handler BatchHandler, opts ...SubscribeOption) (Subscriber, error) {
-	return m.funcBatchSubscribe(ctx, topic, handler, opts...)
-}
-
-func (m *memoryBroker) fnBatchSubscribe(ctx context.Context, topic string, handler broker.BatchHandler, opts ...broker.SubscribeOption) (broker.Subscriber, error) {
 	m.RLock()
 	if !m.connected {
 		m.RUnlock()
-		return nil, broker.ErrNotConnected
+		return nil, ErrNotConnected
 	}
 	m.RUnlock()
 
@@ -250,7 +201,7 @@ func (m *memoryBroker) fnBatchSubscribe(ctx context.Context, topic string, handl
 		return nil, err
 	}
 
-	options := broker.NewSubscribeOptions(opts...)
+	options := NewSubscribeOptions(opts...)
 
 	sub := &memorySubscriber{
 		exit:         make(chan bool, 1),
@@ -282,15 +233,11 @@ func (m *memoryBroker) fnBatchSubscribe(ctx context.Context, topic string, handl
 	return sub, nil
 }
 
-func (m *memoryBroker) Subscribe(ctx context.Context, topic string, handler broker.Handler, opts ...broker.SubscribeOption) (broker.Subscriber, error) {
+func (m *memoryBroker) Subscribe(ctx context.Context, topic string, handler Handler, opts ...SubscribeOption) (Subscriber, error) {
-	return m.funcSubscribe(ctx, topic, handler, opts...)
-}
-
-func (m *memoryBroker) fnSubscribe(ctx context.Context, topic string, handler broker.Handler, opts ...broker.SubscribeOption) (broker.Subscriber, error) {
 	m.RLock()
 	if !m.connected {
 		m.RUnlock()
-		return nil, broker.ErrNotConnected
+		return nil, ErrNotConnected
 	}
 	m.RUnlock()
 
@@ -299,7 +246,7 @@ func (m *memoryBroker) fnSubscribe(ctx context.Context, topic string, handler br
 		return nil, err
 	}
 
-	options := broker.NewSubscribeOptions(opts...)
+	options := NewSubscribeOptions(opts...)
 
 	sub := &memorySubscriber{
 		exit:    make(chan bool, 1),
@@ -339,28 +286,16 @@ func (m *memoryBroker) Name() string {
 	return m.opts.Name
 }
 
-func (m *memoryBroker) Live() bool {
-	return true
-}
-
-func (m *memoryBroker) Ready() bool {
-	return true
-}
-
-func (m *memoryBroker) Health() bool {
-	return true
-}
-
 func (m *memoryEvent) Topic() string {
 	return m.topic
 }
 
-func (m *memoryEvent) Message() *broker.Message {
+func (m *memoryEvent) Message() *Message {
 	switch v := m.message.(type) {
-	case *broker.Message:
+	case *Message:
 		return v
 	case []byte:
-		msg := &broker.Message{}
+		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)
@@ -385,11 +320,7 @@ func (m *memoryEvent) SetError(err error) {
 	m.err = err
 }
 
-func (m *memoryEvent) Context() context.Context {
+func (m *memorySubscriber) Options() SubscribeOptions {
-	return m.opts.Context
-}
-
-func (m *memorySubscriber) Options() broker.SubscribeOptions {
 	return m.opts
 }
 
@@ -403,9 +334,9 @@ func (m *memorySubscriber) Unsubscribe(ctx context.Context) error {
 }
 
 // NewBroker return new memory broker
-func NewBroker(opts ...broker.Option) broker.Broker {
+func NewBroker(opts ...Option) Broker {
 	return &memoryBroker{
-		opts:        broker.NewOptions(opts...),
+		opts:        NewOptions(opts...),
 		subscribers: make(map[string][]*memorySubscriber),
 	}
 }

broker/memory_test.go

@@ -5,7 +5,6 @@ import (
 	"fmt"
 	"testing"
 
-	"go.unistack.org/micro/v3/broker"
 	"go.unistack.org/micro/v3/metadata"
 )
 
@@ -13,10 +12,6 @@ func TestMemoryBatchBroker(t *testing.T) {
 	b := NewBroker()
 	ctx := context.Background()
 
-	if err := b.Init(); err != nil {
-		t.Fatalf("Unexpected init error %v", err)
-	}
-
 	if err := b.Connect(ctx); err != nil {
 		t.Fatalf("Unexpected connect error %v", err)
 	}
@@ -24,7 +19,7 @@ func TestMemoryBatchBroker(t *testing.T) {
 	topic := "test"
 	count := 10
 
-	fn := func(evts broker.Events) error {
+	fn := func(evts Events) error {
 		return evts.Ack()
 	}
 
@@ -33,9 +28,9 @@ func TestMemoryBatchBroker(t *testing.T) {
 		t.Fatalf("Unexpected error subscribing %v", err)
 	}
 
-	msgs := make([]*broker.Message, 0, count)
+	msgs := make([]*Message, 0, count)
 	for i := 0; i < count; i++ {
-		message := &broker.Message{
+		message := &Message{
 			Header: map[string]string{
 				metadata.HeaderTopic: topic,
 				"foo":                "bar",
@@ -63,10 +58,6 @@ func TestMemoryBroker(t *testing.T) {
 	b := NewBroker()
 	ctx := context.Background()
 
-	if err := b.Init(); err != nil {
-		t.Fatalf("Unexpected init error %v", err)
-	}
-
 	if err := b.Connect(ctx); err != nil {
 		t.Fatalf("Unexpected connect error %v", err)
 	}
@@ -74,7 +65,7 @@ func TestMemoryBroker(t *testing.T) {
 	topic := "test"
 	count := 10
 
-	fn := func(_ broker.Event) error {
+	fn := func(p Event) error {
 		return nil
 	}
 
@@ -83,9 +74,9 @@ func TestMemoryBroker(t *testing.T) {
 		t.Fatalf("Unexpected error subscribing %v", err)
 	}
 
-	msgs := make([]*broker.Message, 0, count)
+	msgs := make([]*Message, 0, count)
 	for i := 0; i < count; i++ {
-		message := &broker.Message{
+		message := &Message{
 			Header: map[string]string{
 				metadata.HeaderTopic: topic,
 				"foo":                "bar",

broker/noop.go

@@ -1,140 +0,0 @@
-package broker
-
-import (
-	"context"
-	"strings"
-
-	"go.unistack.org/micro/v3/options"
-)
-
-type NoopBroker struct {
-	funcPublish        FuncPublish
-	funcBatchPublish   FuncBatchPublish
-	funcSubscribe      FuncSubscribe
-	funcBatchSubscribe FuncBatchSubscribe
-	opts               Options
-}
-
-func NewBroker(opts ...Option) *NoopBroker {
-	b := &NoopBroker{opts: NewOptions(opts...)}
-	b.funcPublish = b.fnPublish
-	b.funcBatchPublish = b.fnBatchPublish
-	b.funcSubscribe = b.fnSubscribe
-	b.funcBatchSubscribe = b.fnBatchSubscribe
-
-	return b
-}
-
-func (b *NoopBroker) Health() bool {
-	return true
-}
-
-func (b *NoopBroker) Live() bool {
-	return true
-}
-
-func (b *NoopBroker) Ready() bool {
-	return true
-}
-
-func (b *NoopBroker) Name() string {
-	return b.opts.Name
-}
-
-func (b *NoopBroker) String() string {
-	return "noop"
-}
-
-func (b *NoopBroker) Options() Options {
-	return b.opts
-}
-
-func (b *NoopBroker) Init(opts ...Option) error {
-	for _, opt := range opts {
-		opt(&b.opts)
-	}
-
-	b.funcPublish = b.fnPublish
-	b.funcBatchPublish = b.fnBatchPublish
-	b.funcSubscribe = b.fnSubscribe
-	b.funcBatchSubscribe = b.fnBatchSubscribe
-
-	b.opts.Hooks.EachPrev(func(hook options.Hook) {
-		switch h := hook.(type) {
-		case HookPublish:
-			b.funcPublish = h(b.funcPublish)
-		case HookBatchPublish:
-			b.funcBatchPublish = h(b.funcBatchPublish)
-		case HookSubscribe:
-			b.funcSubscribe = h(b.funcSubscribe)
-		case HookBatchSubscribe:
-			b.funcBatchSubscribe = h(b.funcBatchSubscribe)
-		}
-	})
-
-	return nil
-}
-
-func (b *NoopBroker) Connect(_ context.Context) error {
-	return nil
-}
-
-func (b *NoopBroker) Disconnect(_ context.Context) error {
-	return nil
-}
-
-func (b *NoopBroker) Address() string {
-	return strings.Join(b.opts.Addrs, ",")
-}
-
-func (b *NoopBroker) fnBatchPublish(_ context.Context, _ []*Message, _ ...PublishOption) error {
-	return nil
-}
-
-func (b *NoopBroker) BatchPublish(ctx context.Context, msgs []*Message, opts ...PublishOption) error {
-	return b.funcBatchPublish(ctx, msgs, opts...)
-}
-
-func (b *NoopBroker) fnPublish(_ context.Context, _ string, _ *Message, _ ...PublishOption) error {
-	return nil
-}
-
-func (b *NoopBroker) Publish(ctx context.Context, topic string, msg *Message, opts ...PublishOption) error {
-	return b.funcPublish(ctx, topic, msg, opts...)
-}
-
-type NoopSubscriber struct {
-	ctx          context.Context
-	topic        string
-	handler      Handler
-	batchHandler BatchHandler
-	opts         SubscribeOptions
-}
-
-func (b *NoopBroker) fnBatchSubscribe(ctx context.Context, topic string, handler BatchHandler, opts ...SubscribeOption) (Subscriber, error) {
-	return &NoopSubscriber{ctx: ctx, topic: topic, opts: NewSubscribeOptions(opts...), batchHandler: handler}, nil
-}
-
-func (b *NoopBroker) BatchSubscribe(ctx context.Context, topic string, handler BatchHandler, opts ...SubscribeOption) (Subscriber, error) {
-	return b.funcBatchSubscribe(ctx, topic, handler, opts...)
-}
-
-func (b *NoopBroker) fnSubscribe(ctx context.Context, topic string, handler Handler, opts ...SubscribeOption) (Subscriber, error) {
-	return &NoopSubscriber{ctx: ctx, topic: topic, opts: NewSubscribeOptions(opts...), handler: handler}, nil
-}
-
-func (b *NoopBroker) Subscribe(ctx context.Context, topic string, handler Handler, opts ...SubscribeOption) (Subscriber, error) {
-	return b.funcSubscribe(ctx, topic, handler, opts...)
-}
-
-func (s *NoopSubscriber) Options() SubscribeOptions {
-	return s.opts
-}
-
-func (s *NoopSubscriber) Topic() string {
-	return s.topic
-}
-
-func (s *NoopSubscriber) Unsubscribe(_ context.Context) error {
-	return nil
-}

broker/noop_test.go

@@ -1,35 +0,0 @@
-package broker
-
-import (
-	"context"
-	"testing"
-)
-
-type testHook struct {
-	f bool
-}
-
-func (t *testHook) Publish1(fn FuncPublish) FuncPublish {
-	return func(ctx context.Context, topic string, msg *Message, opts ...PublishOption) error {
-		t.f = true
-		return fn(ctx, topic, msg, opts...)
-	}
-}
-
-func TestNoopHook(t *testing.T) {
-	h := &testHook{}
-
-	b := NewBroker(Hooks(HookPublish(h.Publish1)))
-
-	if err := b.Init(); err != nil {
-		t.Fatal(err)
-	}
-
-	if err := b.Publish(context.TODO(), "", nil); err != nil {
-		t.Fatal(err)
-	}
-
-	if !h.f {
-		t.Fatal("hook not works")
-	}
-}

broker/options.go

@@ -8,17 +8,12 @@ import (
 	"go.unistack.org/micro/v3/codec"
 	"go.unistack.org/micro/v3/logger"
 	"go.unistack.org/micro/v3/meter"
-	"go.unistack.org/micro/v3/options"
 	"go.unistack.org/micro/v3/register"
-	"go.unistack.org/micro/v3/sync"
 	"go.unistack.org/micro/v3/tracer"
 )
 
 // Options struct
 type Options struct {
-	// Name holds the broker name
-	Name string
-
 	// Tracer used for tracing
 	Tracer tracer.Tracer
 	// Register can be used for clustering
@@ -31,37 +26,27 @@ type Options struct {
 	Meter meter.Meter
 	// Context holds external options
 	Context context.Context
-
-	// Wait waits for a collection of goroutines to finish
-	Wait *sync.WaitGroup
 	// 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
-
+	// Name holds the broker name
+	Name string
 	// Addrs holds the broker address
 	Addrs []string
-	// Hooks can be run before broker Publish/BatchPublish and
-	// Subscribe/BatchSubscribe methods
-	Hooks options.Hooks
-
-	// GracefulTimeout contains time to wait to finish in flight requests
-	GracefulTimeout time.Duration
 }
 
 // NewOptions create new Options
 func NewOptions(opts ...Option) Options {
 	options := Options{
-		Register:        register.DefaultRegister,
+		Register: register.DefaultRegister,
-		Logger:          logger.DefaultLogger,
+		Logger:   logger.DefaultLogger,
-		Context:         context.Background(),
+		Context:  context.Background(),
-		Meter:           meter.DefaultMeter,
+		Meter:    meter.DefaultMeter,
-		Codec:           codec.DefaultCodec,
+		Codec:    codec.DefaultCodec,
-		Tracer:          tracer.DefaultTracer,
+		Tracer:   tracer.DefaultTracer,
-		GracefulTimeout: DefaultGracefulTimeout,
 	}
 	for _, o := range opts {
 		o(&options)
@@ -239,13 +224,6 @@ func Name(n string) Option {
 	}
 }
 
-// Hooks sets hook runs before action
-func Hooks(h ...options.Hook) Option {
-	return func(o *Options) {
-		o.Hooks = append(o.Hooks, h...)
-	}
-}
-
 // SubscribeContext set context
 func SubscribeContext(ctx context.Context) SubscribeOption {
 	return func(o *SubscribeOptions) {

client/backoff.go

@@ -17,13 +17,13 @@ func BackoffExp(_ context.Context, _ Request, attempts int) (time.Duration, erro
 }
 
 // BackoffInterval specifies randomization interval for backoff func
-func BackoffInterval(minTime time.Duration, maxTime time.Duration) BackoffFunc {
+func BackoffInterval(min time.Duration, max time.Duration) BackoffFunc {
 	return func(_ context.Context, _ Request, attempts int) (time.Duration, error) {
 		td := time.Duration(math.Pow(float64(attempts), math.E)) * time.Millisecond * 100
-		if td < minTime {
+		if td < min {
-			return minTime, nil
+			return min, nil
-		} else if td > maxTime {
+		} else if td > max {
-			return maxTime, nil
+			return max, nil
 		}
 		return td, nil
 	}

client/backoff_test.go

@@ -34,23 +34,23 @@ func TestBackoffExp(t *testing.T) {
 }
 
 func TestBackoffInterval(t *testing.T) {
-	minTime := 100 * time.Millisecond
+	min := 100 * time.Millisecond
-	maxTime := 300 * time.Millisecond
+	max := 300 * time.Millisecond
 
 	r := &testRequest{
 		service: "test",
 		method:  "test",
 	}
 
-	fn := BackoffInterval(minTime, maxTime)
+	fn := BackoffInterval(min, max)
 	for i := 0; i < 5; i++ {
 		d, err := fn(context.TODO(), r, i)
 		if err != nil {
 			t.Fatal(err)
 		}
 
-		if d < minTime || d > maxTime {
+		if d < min || d > max {
-			t.Fatalf("Expected %v < %v < %v", minTime, d, maxTime)
+			t.Fatalf("Expected %v < %v < %v", min, d, max)
 		}
 	}
 }

client/client.go

@@ -1,5 +1,5 @@
 // Package client is an interface for an RPC client
-package client
+package client // import "go.unistack.org/micro/v3/client"
 
 import (
 	"context"
@@ -13,7 +13,7 @@ var (
 	// DefaultClient is the global default client
 	DefaultClient = NewClient()
 	// DefaultContentType is the default content-type if not specified
-	DefaultContentType = ""
+	DefaultContentType = "application/json"
 	// 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
@@ -44,17 +44,6 @@ type Client interface {
 	String() string
 }
 
-type (
-	FuncCall         func(ctx context.Context, req Request, rsp interface{}, opts ...CallOption) error
-	HookCall         func(next FuncCall) FuncCall
-	FuncStream       func(ctx context.Context, req Request, opts ...CallOption) (Stream, error)
-	HookStream       func(next FuncStream) FuncStream
-	FuncPublish      func(ctx context.Context, msg Message, opts ...PublishOption) error
-	HookPublish      func(next FuncPublish) FuncPublish
-	FuncBatchPublish func(ctx context.Context, msg []Message, opts ...PublishOption) error
-	HookBatchPublish func(next FuncBatchPublish) FuncBatchPublish
-)
-
 // Message is the interface for publishing asynchronously
 type Message interface {
 	Topic() string

client/client_call_options_test.go

@@ -0,0 +1,26 @@
+package client
+
+import (
+	"context"
+	"testing"
+	"time"
+)
+
+func TestNewClientCallOptions(t *testing.T) {
+	var flag bool
+	w := func(fn CallFunc) CallFunc {
+		flag = true
+		return fn
+	}
+	c := NewClientCallOptions(NewClient(),
+		WithAddress("127.0.0.1"),
+		WithCallWrapper(w),
+		WithRequestTimeout(1*time.Millisecond),
+		WithRetries(0),
+		WithBackoff(BackoffInterval(10*time.Millisecond, 100*time.Millisecond)),
+	)
+	_ = c.Call(context.TODO(), c.NewRequest("service", "endpoint", nil), nil)
+	if !flag {
+		t.Fatalf("NewClientCallOptions not works")
+	}
+}

client/context.go

@@ -15,15 +15,6 @@ func FromContext(ctx context.Context) (Client, bool) {
 	return c, ok
 }
 
-// MustContext get client from context
-func MustContext(ctx context.Context) Client {
-	c, ok := FromContext(ctx)
-	if !ok {
-		panic("missing client")
-	}
-	return c
-}
-
 // NewContext put client in context
 func NewContext(ctx context.Context, c Client) context.Context {
 	if ctx == nil {

client/noop.go

@@ -3,18 +3,13 @@ package client
 import (
 	"context"
 	"fmt"
-	"os"
-	"strconv"
 	"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/options"
 	"go.unistack.org/micro/v3/selector"
-	"go.unistack.org/micro/v3/semconv"
-	"go.unistack.org/micro/v3/tracer"
 )
 
 // DefaultCodecs will be used to encode/decode data
@@ -23,11 +18,7 @@ var DefaultCodecs = map[string]codec.Codec{
 }
 
 type noopClient struct {
-	funcPublish      FuncPublish
+	opts Options
-	funcBatchPublish FuncBatchPublish
-	funcCall         FuncCall
-	funcStream       FuncStream
-	opts             Options
 }
 
 type noopMessage struct {
@@ -48,14 +39,16 @@ type noopRequest struct {
 
 // NewClient returns new noop client
 func NewClient(opts ...Option) Client {
-	n := &noopClient{opts: NewOptions(opts...)}
+	nc := &noopClient{opts: NewOptions(opts...)}
+	// wrap in reverse
 
-	n.funcCall = n.fnCall
+	c := Client(nc)
-	n.funcStream = n.fnStream
-	n.funcPublish = n.fnPublish
-	n.funcBatchPublish = n.fnBatchPublish
 
-	return n
+	for i := len(nc.opts.Wrappers); i > 0; i-- {
+		c = nc.opts.Wrappers[i-1](c)
+	}
+
+	return c
 }
 
 func (n *noopClient) Name() string {
@@ -107,13 +100,10 @@ func (n *noopResponse) Read() ([]byte, error) {
 	return nil, nil
 }
 
-type noopStream struct {
+type noopStream struct{}
-	err error
-	ctx context.Context
-}
 
 func (n *noopStream) Context() context.Context {
-	return n.ctx
+	return context.Background()
 }
 
 func (n *noopStream) Request() Request {
@@ -141,21 +131,15 @@ func (n *noopStream) RecvMsg(interface{}) error {
 }
 
 func (n *noopStream) Error() error {
-	return n.err
+	return nil
 }
 
 func (n *noopStream) Close() error {
-	if sp, ok := tracer.SpanFromContext(n.ctx); ok && sp != nil {
+	return nil
-		if n.err != nil {
-			sp.SetStatus(tracer.SpanStatusError, n.err.Error())
-		}
-		sp.Finish()
-	}
-	return n.err
 }
 
 func (n *noopStream) CloseSend() error {
-	return n.err
+	return nil
 }
 
 func (n *noopMessage) Topic() string {
@@ -188,25 +172,6 @@ func (n *noopClient) Init(opts ...Option) error {
 	for _, o := range opts {
 		o(&n.opts)
 	}
-
-	n.funcCall = n.fnCall
-	n.funcStream = n.fnStream
-	n.funcPublish = n.fnPublish
-	n.funcBatchPublish = n.fnBatchPublish
-
-	n.opts.Hooks.EachPrev(func(hook options.Hook) {
-		switch h := hook.(type) {
-		case HookCall:
-			n.funcCall = h(n.funcCall)
-		case HookStream:
-			n.funcStream = h(n.funcStream)
-		case HookPublish:
-			n.funcPublish = h(n.funcPublish)
-		case HookBatchPublish:
-			n.funcBatchPublish = h(n.funcBatchPublish)
-		}
-	})
-
 	return nil
 }
 
@@ -219,31 +184,6 @@ func (n *noopClient) String() string {
 }
 
 func (n *noopClient) Call(ctx context.Context, req Request, rsp interface{}, opts ...CallOption) error {
-	ts := time.Now()
-	n.opts.Meter.Counter(semconv.ClientRequestInflight, "endpoint", req.Endpoint()).Inc()
-	var sp tracer.Span
-	ctx, sp = n.opts.Tracer.Start(ctx, "rpc-client",
-		tracer.WithSpanKind(tracer.SpanKindClient),
-		tracer.WithSpanLabels("endpoint", req.Endpoint()),
-	)
-	err := n.funcCall(ctx, req, rsp, opts...)
-	n.opts.Meter.Counter(semconv.ClientRequestInflight, "endpoint", req.Endpoint()).Dec()
-	te := time.Since(ts)
-	n.opts.Meter.Summary(semconv.ClientRequestLatencyMicroseconds, "endpoint", req.Endpoint()).Update(te.Seconds())
-	n.opts.Meter.Histogram(semconv.ClientRequestDurationSeconds, "endpoint", req.Endpoint()).Update(te.Seconds())
-
-	if me := errors.FromError(err); me == nil {
-		sp.Finish()
-		n.opts.Meter.Counter(semconv.ClientRequestTotal, "endpoint", req.Endpoint(), "status", "success", "code", strconv.Itoa(int(200))).Inc()
-	} else {
-		sp.SetStatus(tracer.SpanStatusError, err.Error())
-		n.opts.Meter.Counter(semconv.ClientRequestTotal, "endpoint", req.Endpoint(), "status", "failure", "code", strconv.Itoa(int(me.Code))).Inc()
-	}
-
-	return err
-}
-
-func (n *noopClient) fnCall(ctx context.Context, req Request, rsp interface{}, opts ...CallOption) error {
 	// make a copy of call opts
 	callOpts := n.opts.CallOptions
 	for _, opt := range opts {
@@ -272,8 +212,11 @@ func (n *noopClient) fnCall(ctx context.Context, req Request, rsp interface{}, o
 	}
 
 	// make copy of call method
-	hcall := func(ctx context.Context, addr string, req Request, rsp interface{}, opts CallOptions) error {
+	hcall := n.call
-		return nil
+
+	// wrap the call in reverse
+	for i := len(callOpts.CallWrappers); i > 0; i-- {
+		hcall = callOpts.CallWrappers[i-1](hcall)
 	}
 
 	// use the router passed as a call option, or fallback to the rpc clients router
@@ -298,7 +241,7 @@ func (n *noopClient) fnCall(ctx context.Context, req Request, rsp interface{}, o
 		// call backoff first. Someone may want an initial start delay
 		t, err := callOpts.Backoff(ctx, req, i)
 		if err != nil {
-			return errors.InternalServerError("go.micro.client", "%s", err)
+			return errors.InternalServerError("go.micro.client", err.Error())
 		}
 
 		// only sleep if greater than 0
@@ -312,7 +255,7 @@ func (n *noopClient) fnCall(ctx context.Context, req Request, rsp interface{}, o
 			// TODO apply any filtering here
 			routes, err = n.opts.Lookup(ctx, req, callOpts)
 			if err != nil {
-				return errors.InternalServerError("go.micro.client", "%s", err)
+				return errors.InternalServerError("go.micro.client", err.Error())
 			}
 
 			// balance the list of nodes
@@ -372,7 +315,11 @@ func (n *noopClient) fnCall(ctx context.Context, req Request, rsp interface{}, o
 	return gerr
 }
 
-func (n *noopClient) NewRequest(service, endpoint string, _ interface{}, _ ...RequestOption) Request {
+func (n *noopClient) call(ctx context.Context, addr string, req Request, rsp interface{}, opts CallOptions) error {
+	return nil
+}
+
+func (n *noopClient) NewRequest(service, endpoint string, req interface{}, opts ...RequestOption) Request {
 	return &noopRequest{service: service, endpoint: endpoint}
 }
 
@@ -382,31 +329,6 @@ func (n *noopClient) NewMessage(topic string, msg interface{}, opts ...MessageOp
 }
 
 func (n *noopClient) Stream(ctx context.Context, req Request, opts ...CallOption) (Stream, error) {
-	ts := time.Now()
-	n.opts.Meter.Counter(semconv.ClientRequestInflight, "endpoint", req.Endpoint()).Inc()
-	var sp tracer.Span
-	ctx, sp = n.opts.Tracer.Start(ctx, "rpc-client",
-		tracer.WithSpanKind(tracer.SpanKindClient),
-		tracer.WithSpanLabels("endpoint", req.Endpoint()),
-	)
-	stream, err := n.funcStream(ctx, req, opts...)
-	n.opts.Meter.Counter(semconv.ClientRequestInflight, "endpoint", req.Endpoint()).Dec()
-	te := time.Since(ts)
-	n.opts.Meter.Summary(semconv.ClientRequestLatencyMicroseconds, "endpoint", req.Endpoint()).Update(te.Seconds())
-	n.opts.Meter.Histogram(semconv.ClientRequestDurationSeconds, "endpoint", req.Endpoint()).Update(te.Seconds())
-
-	if me := errors.FromError(err); me == nil {
-		sp.Finish()
-		n.opts.Meter.Counter(semconv.ClientRequestTotal, "endpoint", req.Endpoint(), "status", "success", "code", strconv.Itoa(int(200))).Inc()
-	} else {
-		sp.SetStatus(tracer.SpanStatusError, err.Error())
-		n.opts.Meter.Counter(semconv.ClientRequestTotal, "endpoint", req.Endpoint(), "status", "failure", "code", strconv.Itoa(int(me.Code))).Inc()
-	}
-
-	return stream, err
-}
-
-func (n *noopClient) fnStream(ctx context.Context, req Request, opts ...CallOption) (Stream, error) {
 	var err error
 
 	// make a copy of call opts
@@ -466,7 +388,7 @@ func (n *noopClient) fnStream(ctx context.Context, req Request, opts ...CallOpti
 		// call backoff first. Someone may want an initial start delay
 		t, cerr := callOpts.Backoff(ctx, req, i)
 		if cerr != nil {
-			return nil, errors.InternalServerError("go.micro.client", "%s", cerr)
+			return nil, errors.InternalServerError("go.micro.client", cerr.Error())
 		}
 
 		// only sleep if greater than 0
@@ -480,7 +402,7 @@ func (n *noopClient) fnStream(ctx context.Context, req Request, opts ...CallOpti
 			// TODO apply any filtering here
 			routes, err = n.opts.Lookup(ctx, req, callOpts)
 			if err != nil {
-				return nil, errors.InternalServerError("go.micro.client", "%s", err)
+				return nil, errors.InternalServerError("go.micro.client", err.Error())
 			}
 
 			// balance the list of nodes
@@ -546,23 +468,15 @@ func (n *noopClient) fnStream(ctx context.Context, req Request, opts ...CallOpti
 	return nil, grr
 }
 
-func (n *noopClient) stream(ctx context.Context, _ string, _ Request, _ CallOptions) (Stream, error) {
+func (n *noopClient) stream(ctx context.Context, addr string, req Request, opts CallOptions) (Stream, error) {
-	return &noopStream{ctx: ctx}, nil
+	return &noopStream{}, nil
 }
 
 func (n *noopClient) BatchPublish(ctx context.Context, ps []Message, opts ...PublishOption) error {
-	return n.funcBatchPublish(ctx, ps, opts...)
-}
-
-func (n *noopClient) fnBatchPublish(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.funcPublish(ctx, p, opts...)
-}
-
-func (n *noopClient) fnPublish(ctx context.Context, p Message, opts ...PublishOption) error {
 	return n.publish(ctx, []Message{p}, opts...)
 }
 
@@ -571,34 +485,21 @@ func (n *noopClient) publish(ctx context.Context, ps []Message, opts ...PublishO
 
 	msgs := make([]*broker.Message, 0, len(ps))
 
-	// get proxy
-	exchange := ""
-	if v, ok := os.LookupEnv("MICRO_PROXY"); ok {
-		exchange = v
-	}
-	// get the exchange
-	if len(options.Exchange) > 0 {
-		exchange = options.Exchange
-	}
-
-	omd, ok := metadata.FromOutgoingContext(ctx)
-	if !ok {
-		omd = metadata.New(0)
-	}
-
 	for _, p := range ps {
-		md := metadata.Copy(omd)
+		md, ok := metadata.FromOutgoingContext(ctx)
+		if !ok {
+			md = metadata.New(0)
+		}
 		md[metadata.HeaderContentType] = p.ContentType()
+
 		topic := p.Topic()
-		if len(exchange) > 0 {
+
-			topic = exchange
+		// get the exchange
+		if len(options.Exchange) > 0 {
+			topic = options.Exchange
 		}
+
 		md[metadata.HeaderTopic] = topic
-		iter := p.Metadata().Iterator()
-		var k, v string
-		for iter.Next(&k, &v) {
-			md.Set(k, v)
-		}
 
 		var body []byte
 
@@ -609,13 +510,13 @@ func (n *noopClient) publish(ctx context.Context, ps []Message, opts ...PublishO
 			// use codec for payload
 			cf, err := n.newCodec(p.ContentType())
 			if err != nil {
-				return errors.InternalServerError("go.micro.client", "%s", err)
+				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", "%s", err)
+				return errors.InternalServerError("go.micro.client", err.Error())
 			}
 			body = b
 		}
@@ -623,13 +524,6 @@ func (n *noopClient) publish(ctx context.Context, ps []Message, opts ...PublishO
 		msgs = append(msgs, &broker.Message{Header: md, Body: body})
 	}
 
-	if len(msgs) == 1 {
-		return n.opts.Broker.Publish(ctx, msgs[0].Header[metadata.HeaderTopic], msgs[0],
-			broker.PublishContext(options.Context),
-			broker.PublishBodyOnly(options.BodyOnly),
-		)
-	}
-
 	return n.opts.Broker.BatchPublish(ctx, msgs,
 		broker.PublishContext(options.Context),
 		broker.PublishBodyOnly(options.BodyOnly),

client/noop_test.go

@@ -1,35 +0,0 @@
-package client
-
-import (
-	"context"
-	"testing"
-)
-
-type testHook struct {
-	f bool
-}
-
-func (t *testHook) Publish(fn FuncPublish) FuncPublish {
-	return func(ctx context.Context, msg Message, opts ...PublishOption) error {
-		t.f = true
-		return fn(ctx, msg, opts...)
-	}
-}
-
-func TestNoopHook(t *testing.T) {
-	h := &testHook{}
-
-	c := NewClient(Hooks(HookPublish(h.Publish)))
-
-	if err := c.Init(); err != nil {
-		t.Fatal(err)
-	}
-
-	if err := c.Publish(context.TODO(), c.NewMessage("", nil, MessageContentType("application/octet-stream"))); err != nil {
-		t.Fatal(err)
-	}
-
-	if !h.f {
-		t.Fatal("hook not works")
-	}
-}

client/options.go

@@ -11,7 +11,7 @@ import (
 	"go.unistack.org/micro/v3/logger"
 	"go.unistack.org/micro/v3/metadata"
 	"go.unistack.org/micro/v3/meter"
-	"go.unistack.org/micro/v3/options"
+	"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"
@@ -21,16 +21,8 @@ import (
 
 // Options holds client options
 type Options struct {
-	// Codecs map
+	// Transport used for transfer messages
-	Codecs map[string]codec.Codec
+	Transport transport.Transport
-
-	// Proxy is used for proxy requests
-	Proxy string
-	// ContentType is used to select codec
-	ContentType string
-	// Name is the client name
-	Name string
-
 	// Selector used to select needed address
 	Selector selector.Selector
 	// Logger used to log messages
@@ -45,28 +37,28 @@ type Options struct {
 	Context context.Context
 	// Router used to get route
 	Router router.Router
-
 	// TLSConfig specifies tls.Config for secure connection
 	TLSConfig *tls.Config
-
+	// Codecs map
+	Codecs map[string]codec.Codec
 	// Lookup func used to get destination addr
 	Lookup LookupFunc
-	// ContextDialer used to connect
+	// Proxy is used for proxy requests
-	ContextDialer func(context.Context, string) (net.Conn, error)
+	Proxy string
-
+	// ContentType is used to select codec
+	ContentType string
+	// Name is the client name
+	Name string
 	// Wrappers contains wrappers
 	Wrappers []Wrapper
-	// Hooks can be run before broker Publish/BatchPublish and
-	// Subscribe/BatchSubscribe methods
-	Hooks options.Hooks
-
 	// CallOptions contains default CallOptions
 	CallOptions CallOptions
-
 	// PoolSize connection pool size
 	PoolSize int
 	// PoolTTL connection pool ttl
 	PoolTTL time.Duration
+	// ContextDialer used to connect
+	ContextDialer func(context.Context, string) (net.Conn, error)
 }
 
 // NewCallOptions creates new call options struct
@@ -80,16 +72,6 @@ func NewCallOptions(opts ...CallOption) CallOptions {
 
 // CallOptions holds client call options
 type CallOptions struct {
-	// RequestMetadata holds additional metadata for call
-	RequestMetadata metadata.Metadata
-
-	// Network name
-	Network string
-	// Content-Type
-	ContentType string
-	// AuthToken string
-	AuthToken string
-
 	// Selector selects addr
 	Selector selector.Selector
 	// Context used for deadline
@@ -97,30 +79,35 @@ type CallOptions struct {
 	// Router used for route
 	Router router.Router
 	// Retry func used for retries
-
-	// ResponseMetadata holds additional metadata from call
-	ResponseMetadata *metadata.Metadata
-
 	Retry RetryFunc
 	// Backoff func used for backoff when retry
 	Backoff BackoffFunc
-	// ContextDialer used to connect
+	// Network name
-	ContextDialer func(context.Context, string) (net.Conn, error)
+	Network string
-
+	// Content-Type
+	ContentType string
+	// AuthToken string
+	AuthToken string
 	// Address specifies static addr list
 	Address []string
 	// SelectOptions selector options
 	SelectOptions []selector.SelectOption
-
+	// CallWrappers call wrappers
+	CallWrappers []CallWrapper
 	// StreamTimeout stream timeout
 	StreamTimeout time.Duration
 	// RequestTimeout request timeout
 	RequestTimeout time.Duration
-
+	// RequestMetadata holds additional metadata for call
+	RequestMetadata metadata.Metadata
+	// ResponseMetadata holds additional metadata from call
+	ResponseMetadata *metadata.Metadata
 	// DialTimeout dial timeout
 	DialTimeout time.Duration
 	// Retries specifies retries num
 	Retries int
+	// ContextDialer used to connect
+	ContextDialer func(context.Context, string) (net.Conn, error)
 }
 
 // ContextDialer pass ContextDialer to client
@@ -198,23 +185,25 @@ func NewOptions(opts ...Option) Options {
 	options := Options{
 		Context:     context.Background(),
 		ContentType: DefaultContentType,
-		Codecs:      DefaultCodecs,
+		Codecs:      make(map[string]codec.Codec),
 		CallOptions: CallOptions{
 			Context:        context.Background(),
 			Backoff:        DefaultBackoff,
 			Retry:          DefaultRetry,
 			Retries:        DefaultRetries,
 			RequestTimeout: DefaultRequestTimeout,
+			DialTimeout:    transport.DefaultDialTimeout,
 		},
-		Lookup:   LookupRoute,
+		Lookup:    LookupRoute,
-		PoolSize: DefaultPoolSize,
+		PoolSize:  DefaultPoolSize,
-		PoolTTL:  DefaultPoolTTL,
+		PoolTTL:   DefaultPoolTTL,
-		Selector: random.NewSelector(),
+		Selector:  random.NewSelector(),
-		Logger:   logger.DefaultLogger,
+		Logger:    logger.DefaultLogger,
-		Broker:   broker.DefaultBroker,
+		Broker:    broker.DefaultBroker,
-		Meter:    meter.DefaultMeter,
+		Meter:     meter.DefaultMeter,
-		Tracer:   tracer.DefaultTracer,
+		Tracer:    tracer.DefaultTracer,
-		Router:   router.DefaultRouter,
+		Router:    router.DefaultRouter,
+		Transport: transport.DefaultTransport,
 	}
 
 	for _, o := range opts {
@@ -287,6 +276,13 @@ func PoolTTL(d time.Duration) Option {
 	}
 }
 
+// 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) {
@@ -310,6 +306,20 @@ func Selector(s selector.Selector) Option {
 	}
 }
 
+// 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...)
+	}
+}
+
 // Backoff is used to set the backoff function used when retrying Calls
 func Backoff(fn BackoffFunc) Option {
 	return func(o *Options) {
@@ -336,6 +346,14 @@ 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),
+		)
 	}
 }
 
@@ -432,6 +450,13 @@ func WithAddress(a ...string) CallOption {
 	}
 }
 
+// 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 {
@@ -501,6 +526,13 @@ func WithAuthToken(t string) CallOption {
 	}
 }
 
+// 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) {
@@ -559,10 +591,3 @@ func RequestContentType(ct string) RequestOption {
 		o.ContentType = ct
 	}
 }
-
-// Hooks sets hook runs before action
-func Hooks(h ...options.Hook) Option {
-	return func(o *Options) {
-		o.Hooks = append(o.Hooks, h...)
-	}
-}

cluster/cluster.go

@@ -1,47 +0,0 @@
-package cluster
-
-import (
-	"context"
-
-	"go.unistack.org/micro/v3/metadata"
-)
-
-// Message sent to member in cluster
-type Message interface {
-	// Header returns message headers
-	Header() metadata.Metadata
-	// Body returns broker message may be []byte slice or some go struct or interface
-	Body() interface{}
-}
-
-type Node interface {
-	// Name returns node name
-	Name() string
-	// Address returns node address
-	Address() string
-	// Metadata returns node metadata
-	Metadata() metadata.Metadata
-}
-
-// Cluster interface used for cluster communication across nodes
-type Cluster interface {
-	// Join is used to take an existing members and performing state sync
-	Join(ctx context.Context, addr ...string) error
-	// Leave broadcast a leave message and stop listeners
-	Leave(ctx context.Context) error
-	// Ping is used to probe live status of the node
-	Ping(ctx context.Context, node Node, payload []byte) error
-	// Members returns the cluster members
-	Members() ([]Node, error)
-	// Broadcast send message for all members in cluster, if filter is not nil, nodes may be filtered
-	// by key/value pairs
-	Broadcast(ctx context.Context, msg Message, filter ...string) error
-	// Unicast send message to single member in cluster
-	Unicast(ctx context.Context, node Node, msg Message) error
-	// Live returns cluster liveness
-	Live() bool
-	// Ready returns cluster readiness
-	Ready() bool
-	// Health returns cluster health
-	Health() bool
-}

codec/codec.go

@@ -1,8 +1,19 @@
 // Package codec is an interface for encoding messages
-package codec
+package codec // import "go.unistack.org/micro/v3/codec"
 
 import (
 	"errors"
+	"io"
+
+	"go.unistack.org/micro/v3/metadata"
+)
+
+// Message types
+const (
+	Error MessageType = iota
+	Request
+	Response
+	Event
 )
 
 var (
@@ -13,44 +24,63 @@ var (
 )
 
 var (
+	// DefaultMaxMsgSize specifies how much data codec can handle
+	DefaultMaxMsgSize = 1024 * 1024 * 4 // 4Mb
 	// DefaultCodec is the global default codec
 	DefaultCodec = NewCodec()
 	// DefaultTagName specifies struct tag name to control codec Marshal/Unmarshal
 	DefaultTagName = "codec"
 )
 
-// Codec encodes/decodes various types of messages.
+// MessageType specifies message type for codec
+type MessageType int
+
+// Codec encodes/decodes various types of messages used within micro.
+// ReadHeader and ReadBody are called in pairs to read requests/responses
+// from the connection. Close is called when finished with the
+// connection. ReadBody may be called with a nil argument to force the
+// body to be read and discarded.
 type Codec interface {
+	ReadHeader(r io.Reader, m *Message, mt MessageType) error
+	ReadBody(r io.Reader, v interface{}) error
+	Write(w io.Writer, m *Message, v interface{}) error
 	Marshal(v interface{}, opts ...Option) ([]byte, error)
 	Unmarshal(b []byte, v interface{}, opts ...Option) error
 	String() string
 }
 
-type CodecV2 interface {
+// Message represents detailed information about
-	Marshal(buf []byte, v interface{}, opts ...Option) ([]byte, error)
+// the communication, likely followed by the body.
-	Unmarshal(buf []byte, v interface{}, opts ...Option) error
+// In the case of an error, body may be nil.
-	String() string
+type Message struct {
+	Header   metadata.Metadata
+	Target   string
+	Method   string
+	Endpoint string
+	Error    string
+	ID       string
+	Body     []byte
+	Type     MessageType
 }
 
-// RawMessage is a raw encoded JSON value.
+// NewMessage creates new codec message
-// It implements Marshaler and Unmarshaler and can be used to delay decoding or precompute a encoding.
+func NewMessage(t MessageType) *Message {
-type RawMessage []byte
+	return &Message{Type: t, Header: metadata.New(0)}
+}
 
-// MarshalJSON returns m as the JSON encoding of m.
+// MarshalAppend calls codec.Marshal(v) and returns the data appended to buf.
-func (m *RawMessage) MarshalJSON() ([]byte, error) {
+// If codec implements MarshalAppend, that is called instead.
-	if m == nil {
+func MarshalAppend(buf []byte, c Codec, v interface{}, opts ...Option) ([]byte, error) {
-		return []byte("null"), nil
+	if nc, ok := c.(interface {
-	} else if len(*m) == 0 {
+		MarshalAppend([]byte, interface{}, ...Option) ([]byte, error)
-		return []byte("null"), nil
+	}); ok {
+		return nc.MarshalAppend(buf, v, opts...)
 	}
-	return *m, nil
-}
 
-// UnmarshalJSON sets *m to a copy of data.
+	mbuf, err := c.Marshal(v, opts...)
-func (m *RawMessage) UnmarshalJSON(data []byte) error {
+	if err != nil {
-	if m == nil {
+		return nil, err
-		return errors.New("RawMessage UnmarshalJSON on nil pointer")
 	}
-	*m = append((*m)[0:0], data...)
+
-	return nil
+	return append(buf, mbuf...), nil
 }

codec/context.go

@@ -15,15 +15,6 @@ func FromContext(ctx context.Context) (Codec, bool) {
 	return c, ok
 }
 
-// MustContext returns codec from context
-func MustContext(ctx context.Context) Codec {
-	c, ok := FromContext(ctx)
-	if !ok {
-		panic("missing codec")
-	}
-	return c
-}
-
 // NewContext put codec in context
 func NewContext(ctx context.Context, c Codec) context.Context {
 	if ctx == nil {

codec/noop.go

@@ -2,14 +2,70 @@ package codec
 
 import (
 	"encoding/json"
-
+	"io"
-	codecpb "go.unistack.org/micro-proto/v3/codec"
 )
 
 type noopCodec struct {
 	opts Options
 }
 
+func (c *noopCodec) ReadHeader(conn io.Reader, m *Message, t MessageType) error {
+	return nil
+}
+
+func (c *noopCodec) ReadBody(conn io.Reader, b interface{}) error {
+	// read bytes
+	buf, err := io.ReadAll(conn)
+	if err != nil {
+		return err
+	}
+
+	if b == nil {
+		return nil
+	}
+
+	switch v := b.(type) {
+	case *string:
+		*v = string(buf)
+	case *[]byte:
+		*v = buf
+	case *Frame:
+		v.Data = buf
+	default:
+		return json.Unmarshal(buf, v)
+	}
+
+	return nil
+}
+
+func (c *noopCodec) Write(conn io.Writer, m *Message, b interface{}) error {
+	if b == nil {
+		return nil
+	}
+
+	var v []byte
+	switch vb := b.(type) {
+	case *Frame:
+		v = vb.Data
+	case string:
+		v = []byte(vb)
+	case *string:
+		v = []byte(*vb)
+	case *[]byte:
+		v = *vb
+	case []byte:
+		v = vb
+	default:
+		var err error
+		v, err = json.Marshal(vb)
+		if err != nil {
+			return err
+		}
+	}
+	_, err := conn.Write(v)
+	return err
+}
+
 func (c *noopCodec) String() string {
 	return "noop"
 }
@@ -35,8 +91,8 @@ func (c *noopCodec) Marshal(v interface{}, opts ...Option) ([]byte, error) {
 		return ve, nil
 	case *Frame:
 		return ve.Data, nil
-	case *codecpb.Frame:
+	case *Message:
-		return ve.Data, nil
+		return ve.Body, nil
 	}
 
 	return json.Marshal(v)
@@ -59,8 +115,8 @@ func (c *noopCodec) Unmarshal(d []byte, v interface{}, opts ...Option) error {
 	case *Frame:
 		ve.Data = d
 		return nil
-	case *codecpb.Frame:
+	case *Message:
-		ve.Data = d
+		ve.Body = d
 		return nil
 	}
 

codec/options.go

@@ -23,8 +23,15 @@ type Options struct {
 	Context context.Context
 	// TagName specifies tag name in struct to control codec
 	TagName string
-	// Flatten specifies that struct must be analyzed for flatten tag
+	// MaxMsgSize specifies max messages size that reads by codec
-	Flatten bool
+	MaxMsgSize int
+}
+
+// MaxMsgSize sets the max message size
+func MaxMsgSize(n int) Option {
+	return func(o *Options) {
+		o.MaxMsgSize = n
+	}
 }
 
 // TagName sets the codec tag name in struct
@@ -34,13 +41,6 @@ func TagName(n string) Option {
 	}
 }
 
-// Flatten enables checking for flatten tag name
-func Flatten(b bool) Option {
-	return func(o *Options) {
-		o.Flatten = b
-	}
-}
-
 // Logger sets the logger
 func Logger(l logger.Logger) Option {
 	return func(o *Options) {
@@ -65,12 +65,12 @@ func Meter(m meter.Meter) Option {
 // NewOptions returns new options
 func NewOptions(opts ...Option) Options {
 	options := Options{
-		Context: context.Background(),
+		Context:    context.Background(),
-		Logger:  logger.DefaultLogger,
+		Logger:     logger.DefaultLogger,
-		Meter:   meter.DefaultMeter,
+		Meter:      meter.DefaultMeter,
-		Tracer:  tracer.DefaultTracer,
+		Tracer:     tracer.DefaultTracer,
-		TagName: DefaultTagName,
+		MaxMsgSize: DefaultMaxMsgSize,
-		Flatten: false,
+		TagName:    DefaultTagName,
 	}
 
 	for _, o := range opts {

config/config.go

@@ -1,5 +1,5 @@
 // Package config is an interface for dynamic configuration.
-package config
+package config // import "go.unistack.org/micro/v3/config"
 
 import (
 	"context"
@@ -50,13 +50,6 @@ type Config interface {
 	String() string
 }
 
-type (
-	FuncLoad func(ctx context.Context, opts ...LoadOption) error
-	HookLoad func(next FuncLoad) FuncLoad
-	FuncSave func(ctx context.Context, opts ...SaveOption) error
-	HookSave func(next FuncSave) FuncSave
-)
-
 // Watcher is the config watcher
 type Watcher interface {
 	// Next blocks until update happens or error returned
@@ -131,29 +124,11 @@ func Validate(ctx context.Context, cfg interface{}) error {
 }
 
 var (
-	// DefaultBeforeLoad default func that runs before config Load
+	// DefaultAfterLoad default func that runs after 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.Error(ctx, c.String()+" BeforeLoad error", err)
-				if !c.Options().AllowFail {
-					return err
-				}
-			}
-		}
-		return nil
-	}
-	// 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)
+				c.Options().Logger.Errorf(ctx, "%s AfterLoad err: %v", c.String(), err)
 				if !c.Options().AllowFail {
 					return err
 				}
@@ -161,29 +136,11 @@ var (
 		}
 		return nil
 	}
-	// DefaultBeforeSave default func that runs befora config Save
+	// DefaultAfterSave default func that runs after 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.Error(ctx, c.String()+" BeforeSave error", 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 fn == nil {
-				return nil
-			}
 			if err := fn(ctx, c); err != nil {
-				c.Options().Logger.Error(ctx, c.String()+" AfterSave error", err)
+				c.Options().Logger.Errorf(ctx, "%s AfterSave err: %v", c.String(), err)
 				if !c.Options().AllowFail {
 					return err
 				}
@@ -191,14 +148,11 @@ var (
 		}
 		return nil
 	}
-	// DefaultBeforeInit default func that runs befora config Init
+	// DefaultBeforeLoad default func that runs before config load
-	DefaultBeforeInit = func(ctx context.Context, c Config) error {
+	DefaultBeforeLoad = func(ctx context.Context, c Config) error {
-		for _, fn := range c.Options().BeforeInit {
+		for _, fn := range c.Options().BeforeLoad {
-			if fn == nil {
-				return nil
-			}
 			if err := fn(ctx, c); err != nil {
-				c.Options().Logger.Error(ctx, c.String()+" BeforeInit error", err)
+				c.Options().Logger.Errorf(ctx, "%s BeforeLoad err: %v", c.String(), err)
 				if !c.Options().AllowFail {
 					return err
 				}
@@ -206,14 +160,11 @@ var (
 		}
 		return nil
 	}
-	// DefaultAfterInit default func that runs after config Init
+	// DefaultBeforeSave default func that runs befora config save
-	DefaultAfterInit = func(ctx context.Context, c Config) error {
+	DefaultBeforeSave = func(ctx context.Context, c Config) error {
-		for _, fn := range c.Options().AfterSave {
+		for _, fn := range c.Options().BeforeSave {
-			if fn == nil {
-				return nil
-			}
 			if err := fn(ctx, c); err != nil {
-				c.Options().Logger.Error(ctx, c.String()+" AfterInit error", err)
+				c.Options().Logger.Errorf(ctx, "%s BeforeSave err: %v", c.String(), err)
 				if !c.Options().AllowFail {
 					return err
 				}

config/context.go

@@ -15,15 +15,6 @@ func FromContext(ctx context.Context) (Config, bool) {
 	return c, ok
 }
 
-// MustContext returns store from context
-func MustContext(ctx context.Context) Config {
-	c, ok := FromContext(ctx)
-	if !ok {
-		panic("missing config")
-	}
-	return c
-}
-
 // NewContext put store in context
 func NewContext(ctx context.Context, c Config) context.Context {
 	if ctx == nil {

config/default.go

@@ -5,20 +5,13 @@ import (
 	"reflect"
 	"strconv"
 	"strings"
-	"time"
 
-	"dario.cat/mergo"
+	"github.com/imdario/mergo"
-	"github.com/google/uuid"
-	"go.unistack.org/micro/v3/options"
-	mid "go.unistack.org/micro/v3/util/id"
 	rutil "go.unistack.org/micro/v3/util/reflect"
-	mtime "go.unistack.org/micro/v3/util/time"
 )
 
 type defaultConfig struct {
-	funcLoad FuncLoad
+	opts Options
-	funcSave FuncSave
-	opts     Options
 }
 
 func (c *defaultConfig) Options() Options {
@@ -29,42 +22,11 @@ func (c *defaultConfig) Init(opts ...Option) error {
 	for _, o := range opts {
 		o(&c.opts)
 	}
-
-	if err := DefaultBeforeInit(c.opts.Context, c); err != nil && !c.opts.AllowFail {
-		return err
-	}
-
-	c.funcLoad = c.fnLoad
-	c.funcSave = c.fnSave
-
-	c.opts.Hooks.EachPrev(func(hook options.Hook) {
-		switch h := hook.(type) {
-		case HookLoad:
-			c.funcLoad = h(c.funcLoad)
-		case HookSave:
-			c.funcSave = h(c.funcSave)
-		}
-	})
-
-	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 {
-	return c.funcLoad(ctx, opts...)
+	if err := DefaultBeforeLoad(ctx, c); err != nil {
-}
-
-func (c *defaultConfig) fnLoad(ctx context.Context, opts ...LoadOption) error {
-	var err 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
 	}
 
@@ -87,20 +49,21 @@ func (c *defaultConfig) fnLoad(ctx context.Context, opts ...LoadOption) error {
 		if !c.opts.AllowFail {
 			return err
 		}
-		if err = DefaultAfterLoad(ctx, c); err != nil && !c.opts.AllowFail {
+		return DefaultAfterLoad(ctx, c)
-			return err
-		}
 	}
 
 	if err = fillValues(reflect.ValueOf(src), c.opts.StructTag); err == nil {
 		err = mergo.Merge(dst, src, mopts...)
 	}
 
-	if err != nil && !c.opts.AllowFail {
+	if err != nil {
-		return err
+		c.opts.Logger.Errorf(ctx, "default load error: %v", err)
+		if !c.opts.AllowFail {
+			return err
+		}
 	}
 
-	if err := DefaultAfterLoad(ctx, c); err != nil && !c.opts.AllowFail {
+	if err := DefaultAfterLoad(ctx, c); err != nil {
 		return err
 	}
 
@@ -112,7 +75,6 @@ func fillValue(value reflect.Value, val string) error {
 	if !rutil.IsEmpty(value) {
 		return nil
 	}
-
 	switch value.Kind() {
 	case reflect.Map:
 		t := value.Type()
@@ -151,20 +113,6 @@ 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)
@@ -203,26 +151,11 @@ func fillValue(value reflect.Value, val string) error {
 		}
 		value.Set(reflect.ValueOf(int32(v)))
 	case reflect.Int64:
-		switch {
+		v, err := strconv.ParseInt(val, 10, 64)
-		case value.Type().String() == "time.Duration" && value.Type().PkgPath() == "time":
+		if err != nil {
-			v, err := time.ParseDuration(val)
+			return err
-			if err != nil {
-				return err
-			}
-			value.Set(reflect.ValueOf(v))
-		case value.Type().String() == "time.Duration" && value.Type().PkgPath() == "go.unistack.org/micro/v3/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))
 		}
+		value.Set(reflect.ValueOf(v))
 	case reflect.Uint:
 		v, err := strconv.ParseUint(val, 10, 0)
 		if err != nil {
@@ -254,7 +187,6 @@ func fillValue(value reflect.Value, val string) error {
 		}
 		value.Set(reflect.ValueOf(v))
 	}
-
 	return nil
 }
 
@@ -318,14 +250,6 @@ func fillValues(valueOf reflect.Value, tname string) error {
 }
 
 func (c *defaultConfig) Save(ctx context.Context, opts ...SaveOption) error {
-	return c.funcSave(ctx, opts...)
-}
-
-func (c *defaultConfig) fnSave(ctx context.Context, opts ...SaveOption) error {
-	if c.opts.SkipSave != nil && c.opts.SkipSave(ctx, c) {
-		return nil
-	}
-
 	if err := DefaultBeforeSave(ctx, c); err != nil {
 		return err
 	}
@@ -345,7 +269,7 @@ func (c *defaultConfig) Name() string {
 	return c.opts.Name
 }
 
-func (c *defaultConfig) Watch(_ context.Context, _ ...WatchOption) (Watcher, error) {
+func (c *defaultConfig) Watch(ctx context.Context, opts ...WatchOption) (Watcher, error) {
 	return nil, ErrWatcherNotImplemented
 }
 
@@ -355,9 +279,5 @@ func NewConfig(opts ...Option) Config {
 	if len(options.StructTag) == 0 {
 		options.StructTag = "default"
 	}
-	c := &defaultConfig{opts: options}
+	return &defaultConfig{opts: options}
-	c.funcLoad = c.fnLoad
-	c.funcSave = c.fnSave
-
-	return c
 }

config/default_test.go

@@ -3,26 +3,16 @@ package config_test
 import (
 	"context"
 	"fmt"
-	"reflect"
 	"testing"
-	"time"
 
 	"go.unistack.org/micro/v3/config"
-	mtime "go.unistack.org/micro/v3/util/time"
 )
 
 type cfg struct {
-	MapValue    map[string]bool `default:"key1=true,key2=false"`
-	StructValue *cfgStructValue
-
 	StringValue string `default:"string_value"`
 	IgnoreValue string `json:"-"`
-	UUIDValue   string `default:"micro:generate uuid"`
+	StructValue *cfgStructValue
-	IDValue     string `default:"micro:generate id"`
+	IntValue    int `default:"99"`
-
-	DurationValue  time.Duration  `default:"10s"`
-	MDurationValue mtime.Duration `default:"10s"`
-	IntValue       int            `default:"99"`
 }
 
 type cfgStructValue struct {
@@ -43,35 +33,6 @@ func (c *cfgStructValue) Validate() error {
 	return nil
 }
 
-type testHook struct {
-	f bool
-}
-
-func (t *testHook) Load(fn config.FuncLoad) config.FuncLoad {
-	return func(ctx context.Context, opts ...config.LoadOption) error {
-		t.f = true
-		return fn(ctx, opts...)
-	}
-}
-
-func TestHook(t *testing.T) {
-	h := &testHook{}
-
-	c := config.NewConfig(config.Struct(h), config.Hooks(config.HookLoad(h.Load)))
-
-	if err := c.Init(); err != nil {
-		t.Fatal(err)
-	}
-
-	if err := c.Load(context.TODO()); err != nil {
-		t.Fatal(err)
-	}
-
-	if !h.f {
-		t.Fatal("hook not works")
-	}
-}
-
 func TestDefault(t *testing.T) {
 	ctx := context.Background()
 	conf := &cfg{IntValue: 10}
@@ -102,19 +63,6 @@ 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")
-	}
 	_ = conf
 	// t.Logf("%#+v\n", conf)
 }
@@ -134,13 +82,3 @@ func TestValidate(t *testing.T) {
 		t.Fatal(err)
 	}
 }
-
-func Test_SizeOf(t *testing.T) {
-	st := cfg{}
-
-	tVal := reflect.TypeOf(st)
-	for i := 0; i < tVal.NumField(); i++ {
-		field := tVal.Field(i)
-		fmt.Printf("Field: %s, Offset: %d, Size: %d\n", field.Name, field.Offset, field.Type.Size())
-	}
-}

config/options.go

@@ -7,7 +7,6 @@ import (
 	"go.unistack.org/micro/v3/codec"
 	"go.unistack.org/micro/v3/logger"
 	"go.unistack.org/micro/v3/meter"
-	"go.unistack.org/micro/v3/options"
 	"go.unistack.org/micro/v3/tracer"
 )
 
@@ -29,26 +28,14 @@ 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
-	// AfterSave contains slice of funcs that runs after Save
+	// AfterLoad contains slice of funcs that runs after load
-	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
+	// BeforeLoad contains slice of funcs that runs before load
-	BeforeInit []func(context.Context, Config) error
+	BeforeLoad []func(context.Context, Config) error
-	// AfterInit contains slice of funcs that runs after Init
+	// AfterSave contains slice of funcs that runs after save
-	AfterInit []func(context.Context, Config) error
+	AfterSave []func(context.Context, Config) error
-
-	// 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
-	// Hooks can be run before/after config Save/Load
-	Hooks options.Hooks
-
 	// AllowFail flag to allow fail in config source
 	AllowFail bool
 }
@@ -77,9 +64,9 @@ 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
@@ -144,20 +131,6 @@ func AllowFail(b bool) Option {
 	}
 }
 
-// BeforeInit run funcs before config Init
-func BeforeInit(fn ...func(context.Context, Config) error) Option {
-	return func(o *Options) {
-		o.BeforeInit = fn
-	}
-}
-
-// AfterInit run funcs after config Init
-func AfterInit(fn ...func(context.Context, Config) error) Option {
-	return func(o *Options) {
-		o.AfterInit = fn
-	}
-}
-
 // BeforeLoad run funcs before config load
 func BeforeLoad(fn ...func(context.Context, Config) error) Option {
 	return func(o *Options) {
@@ -280,10 +253,10 @@ func WatchCoalesce(b bool) WatchOption {
 }
 
 // WatchInterval specifies min and max time.Duration for pulling changes
-func WatchInterval(minTime, maxTime time.Duration) WatchOption {
+func WatchInterval(min, max time.Duration) WatchOption {
 	return func(o *WatchOptions) {
-		o.MinInterval = minTime
+		o.MinInterval = min
-		o.MaxInterval = maxTime
+		o.MaxInterval = max
 	}
 }
 
@@ -293,10 +266,3 @@ func WatchStruct(src interface{}) WatchOption {
 		o.Struct = src
 	}
 }
-
-// Hooks sets hook runs before action
-func Hooks(h ...options.Hook) Option {
-	return func(o *Options) {
-		o.Hooks = append(o.Hooks, h...)
-	}
-}

database/dsn.go

@@ -1,157 +0,0 @@
-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] == '/' {
-			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

@@ -1,31 +0,0 @@
-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

@@ -1,20 +1,14 @@
 // Package errors provides a way to return detailed information
 // for an RPC request error. The error is normally JSON encoded.
-package errors
+package errors // import "go.unistack.org/micro/v3/errors"
 
 import (
 	"bytes"
-	"context"
 	"encoding/json"
-	"errors"
 	"fmt"
-	"io"
 	"net/http"
 	"strconv"
 	"strings"
-
-	"google.golang.org/grpc/codes"
-	"google.golang.org/grpc/status"
 )
 
 var (
@@ -44,20 +38,6 @@ var (
 	ErrGatewayTimeout = &Error{Code: 504}
 )
 
-const ProblemContentType = "application/problem+json"
-
-type Problem struct {
-	Type     string `json:"type,omitempty"`
-	Title    string `json:"title,omitempty"`
-	Detail   string `json:"detail,omitempty"`
-	Instance string `json:"instance,omitempty"`
-	Errors   []struct {
-		Title  string `json:"title,omitempty"`
-		Detail string `json:"detail,omitempty"`
-	} `json:"errors,omitempty"`
-	Status int `json:"status,omitempty"`
-}
-
 // Error type
 type Error struct {
 	// ID holds error id or service, usually someting like my_service or id
@@ -276,10 +256,6 @@ func CodeIn(err interface{}, codes ...int32) bool {
 
 // FromError try to convert go error to *Error
 func FromError(err error) *Error {
-	if err == nil {
-		return nil
-	}
-
 	if verr, ok := err.(*Error); ok && verr != nil {
 		return verr
 	}
@@ -364,135 +340,3 @@ func addslashes(str string) string {
 	}
 	return buf.String()
 }
-
-type retryableError struct {
-	err error
-}
-
-// Retryable returns error that can be retried later
-func Retryable(err error) error {
-	return &retryableError{err: err}
-}
-
-type IsRetryableFunc func(error) bool
-
-var (
-	RetrayableOracleErrors = []IsRetryableFunc{
-		func(err error) bool {
-			errmsg := err.Error()
-			switch {
-			case strings.Contains(errmsg, `ORA-`):
-				return true
-			case strings.Contains(errmsg, `can not assign`):
-				return true
-			case strings.Contains(errmsg, `can't assign`):
-				return true
-			}
-			return false
-		},
-	}
-	RetrayablePostgresErrors = []IsRetryableFunc{
-		func(err error) bool {
-			errmsg := err.Error()
-			switch {
-			case strings.Contains(errmsg, `number of field descriptions must equal number of`):
-				return true
-			case strings.Contains(errmsg, `not a pointer`):
-				return true
-			case strings.Contains(errmsg, `values, but dst struct has only`):
-				return true
-			case strings.Contains(errmsg, `struct doesn't have corresponding row field`):
-				return true
-			case strings.Contains(errmsg, `cannot find field`):
-				return true
-			case strings.Contains(errmsg, `cannot scan`) || strings.Contains(errmsg, `cannot convert`):
-				return true
-			case strings.Contains(errmsg, `failed to connect to`):
-				return true
-			}
-			return false
-		},
-	}
-	RetryableMicroErrors = []IsRetryableFunc{
-		func(err error) bool {
-			switch verr := err.(type) {
-			case *Error:
-				switch verr.Code {
-				case 401, 403, 408, 500, 501, 502, 503, 504:
-					return true
-				default:
-					return false
-				}
-			case *retryableError:
-				return true
-			}
-			return false
-		},
-	}
-	RetryableGoErrors = []IsRetryableFunc{
-		func(err error) bool {
-			switch verr := err.(type) {
-			case interface{ SafeToRetry() bool }:
-				return verr.SafeToRetry()
-			case interface{ Timeout() bool }:
-				return verr.Timeout()
-			}
-			switch {
-			case errors.Is(err, io.EOF), errors.Is(err, io.ErrUnexpectedEOF):
-				return true
-			case errors.Is(err, context.DeadlineExceeded):
-				return true
-			case errors.Is(err, io.ErrClosedPipe), errors.Is(err, io.ErrShortBuffer), errors.Is(err, io.ErrShortWrite):
-				return true
-			}
-			return false
-		},
-	}
-	RetryableGrpcErrors = []IsRetryableFunc{
-		func(err error) bool {
-			st, ok := status.FromError(err)
-			if !ok {
-				return false
-			}
-			switch st.Code() {
-			case codes.Unavailable, codes.ResourceExhausted:
-				return true
-			case codes.DeadlineExceeded:
-				return true
-			case codes.Internal:
-				switch {
-				case strings.Contains(st.Message(), `transport: received the unexpected content-type "text/html; charset=UTF-8"`):
-					return true
-				case strings.Contains(st.Message(), io.ErrUnexpectedEOF.Error()):
-					return true
-				case strings.Contains(st.Message(), `stream terminated by RST_STREAM with error code: INTERNAL_ERROR`):
-					return true
-				}
-			}
-			return false
-		},
-	}
-)
-
-// Unwrap provides error wrapping
-func (e *retryableError) Unwrap() error {
-	return e.err
-}
-
-// Error returns the error string
-func (e *retryableError) Error() string {
-	if e.err == nil {
-		return ""
-	}
-	return e.err.Error()
-}
-
-// IsRetryable checks error for ability to retry later
-func IsRetryable(err error, fns ...IsRetryableFunc) bool {
-	for _, fn := range fns {
-		if ok := fn(err); ok {
-			return true
-		}
-	}
-	return false
-}

errors/errors_test.go

@@ -2,19 +2,12 @@ package errors
 
 import (
 	"encoding/json"
-	"errors"
+	er "errors"
 	"fmt"
 	"net/http"
 	"testing"
 )
 
-func TestIsRetrayable(t *testing.T) {
-	err := fmt.Errorf("ORA-")
-	if !IsRetryable(err, RetrayableOracleErrors...) {
-		t.Fatalf("IsRetrayable not works")
-	}
-}
-
 func TestMarshalJSON(t *testing.T) {
 	e := InternalServerError("id", "err: %v", fmt.Errorf("err: %v", `xxx: "UNIX_TIMESTAMP": invalid identifier`))
 	_, err := json.Marshal(e)
@@ -26,7 +19,7 @@ func TestMarshalJSON(t *testing.T) {
 func TestEmpty(t *testing.T) {
 	msg := "test"
 	var err *Error
-	err = FromError(errors.New(msg))
+	err = FromError(fmt.Errorf(msg))
 	if err.Detail != msg {
 		t.Fatalf("invalid error %v", err)
 	}
@@ -42,7 +35,7 @@ func TestFromError(t *testing.T) {
 	if merr.ID != "go.micro.test" || merr.Code != 404 {
 		t.Fatalf("invalid conversation %v != %v", err, merr)
 	}
-	err = errors.New(err.Error())
+	err = er.New(err.Error())
 	merr = FromError(err)
 	if merr.ID != "go.micro.test" || merr.Code != 404 {
 		t.Fatalf("invalid conversation %v != %v", err, merr)
@@ -57,7 +50,7 @@ func TestEqual(t *testing.T) {
 		t.Fatal("errors must be equal")
 	}
 
-	err3 := errors.New("my test err")
+	err3 := er.New("my test err")
 	if Equal(err1, err3) {
 		t.Fatal("errors must be not equal")
 	}

flow/context.go

@@ -15,15 +15,6 @@ func FromContext(ctx context.Context) (Flow, bool) {
 	return c, ok
 }
 
-// MustContext returns Flow from context
-func MustContext(ctx context.Context) Flow {
-	f, ok := FromContext(ctx)
-	if !ok {
-		panic("missing flow")
-	}
-	return f
-}
-
 // NewContext stores Flow to context
 func NewContext(ctx context.Context, f Flow) context.Context {
 	if ctx == nil {

flow/dag_test.go

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

flow/default.go

@@ -188,7 +188,7 @@ 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.Error(w.opts.Context, "store write error", werr)
+			w.opts.Logger.Errorf(w.opts.Context, "store error: %v", werr)
 		}
 		return "", err
 	}
@@ -212,7 +212,7 @@ func (w *microWorkflow) Execute(ctx context.Context, req *Message, opts ...Execu
 	done := make(chan struct{})
 
 	if werr := workflowStore.Write(w.opts.Context, "status", &codec.Frame{Data: []byte(StatusRunning.String())}); werr != nil {
-		w.opts.Logger.Error(w.opts.Context, "store write error", werr)
+		w.opts.Logger.Errorf(w.opts.Context, "store error: %v", werr)
 		return eid, werr
 	}
 	for idx := range steps {
@@ -237,7 +237,7 @@ func (w *microWorkflow) Execute(ctx context.Context, req *Message, opts ...Execu
 					return
 				}
 				if w.opts.Logger.V(logger.TraceLevel) {
-					w.opts.Logger.Trace(nctx, fmt.Sprintf("will be executed %v", steps[idx][nidx]))
+					w.opts.Logger.Tracef(nctx, "will be executed %v", steps[idx][nidx])
 				}
 				cstep := steps[idx][nidx]
 				// nolint: nestif
@@ -257,21 +257,21 @@ 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.Error(ctx, "store write error", werr)
+								w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
 							}
 							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.Error(ctx, "store write error", werr)
+								w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
 							}
 							cherr <- serr
 							return
 						}
 						if werr := stepStore.Write(ctx, step.ID()+w.opts.Store.Options().Separator+"rsp", rsp); werr != nil {
-							w.opts.Logger.Error(ctx, "store write error", werr)
+							w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
 							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.Error(ctx, "store write error", werr)
+							w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
 							cherr <- werr
 							return
 						}
@@ -290,16 +290,16 @@ 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.Error(ctx, "store write error", werr)
+							w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
 						}
 						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.Error(ctx, "store write error", werr)
+							w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
 						}
 						cherr <- serr
 						return
 					}
 					if werr := stepStore.Write(ctx, cstep.ID()+w.opts.Store.Options().Separator+"rsp", rsp); werr != nil {
-						w.opts.Logger.Error(ctx, "store write error", werr)
+						w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
 						cherr <- werr
 						return
 					}
@@ -317,7 +317,7 @@ func (w *microWorkflow) Execute(ctx context.Context, req *Message, opts ...Execu
 		return eid, nil
 	}
 
-	logger.DefaultLogger.Trace(ctx, "wait for finish or error")
+	logger.Tracef(ctx, "wait for finish or error")
 	select {
 	case <-nctx.Done():
 		err = nctx.Err()
@@ -333,15 +333,15 @@ 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.Error(w.opts.Context, "store write error", werr)
+			w.opts.Logger.Errorf(w.opts.Context, "store error: %v", werr)
 		}
 	case err == nil:
 		if werr := workflowStore.Write(w.opts.Context, "status", &codec.Frame{Data: []byte(StatusSuccess.String())}); werr != nil {
-			w.opts.Logger.Error(w.opts.Context, "store write error", werr)
+			w.opts.Logger.Errorf(w.opts.Context, "store error: %v", werr)
 		}
 	case err != nil:
 		if werr := workflowStore.Write(w.opts.Context, "status", &codec.Frame{Data: []byte(StatusFailure.String())}); werr != nil {
-			w.opts.Logger.Error(w.opts.Context, "store write error", werr)
+			w.opts.Logger.Errorf(w.opts.Context, "store error: %v", werr)
 		}
 	}
 

flow/flow.go

@@ -1,5 +1,5 @@
 // Package flow is an interface used for saga pattern microservice workflow
-package flow
+package flow // import "go.unistack.org/micro/v3/flow"
 
 import (
 	"context"

fsm/default.go

@@ -1,126 +0,0 @@
-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

@@ -1,8 +1,10 @@
-package fsm
+package fsm // import "go.unistack.org/micro/v3/fsm"
 
 import (
 	"context"
 	"errors"
+	"fmt"
+	"sync"
 )
 
 var (
@@ -10,20 +12,170 @@ var (
 	StateEnd        = "end"
 )
 
-type State interface {
+// Options struct holding fsm options
-	Name() string
+type Options struct {
-	Body() interface{}
+	// 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
 }
 
-// StateWrapper wraps the StateFunc and returns the equivalent
+// HookBeforeFunc func signature
-type StateWrapper func(StateFunc) StateFunc
+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
+	}
+}
 
 // StateFunc called on state transition and return next step and error
-type StateFunc func(ctx context.Context, state State, opts ...StateOption) (State, error)
+type StateFunc func(ctx context.Context, args interface{}, opts ...StateOption) (string, interface{}, error)
 
-type FSM interface {
+// FSM is a finite state machine
-	Start(context.Context, interface{}, ...Option) (interface{}, error)
+type FSM struct {
-	Current() string
+	mu          sync.Mutex
-	Reset()
+	statesMap   map[string]StateFunc
-	State(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
+		}
+	}
 }

fsm/fsm_test.go

@@ -1,72 +1,63 @@
 package fsm
 
 import (
+	"bytes"
 	"context"
 	"fmt"
 	"testing"
-
-	"go.unistack.org/micro/v3/logger"
 )
 
 func TestFSMStart(t *testing.T) {
 	ctx := context.TODO()
-
+	buf := bytes.NewBuffer(nil)
-	if err := logger.DefaultLogger.Init(); err != nil {
+	pfb := func(_ context.Context, state string, _ interface{}) {
-		t.Fatal(err)
+		fmt.Fprintf(buf, "before state %s\n", state)
 	}
-
+	pfa := func(_ context.Context, state string, _ interface{}) {
-	wrapper := func(next StateFunc) StateFunc {
+		fmt.Fprintf(buf, "after state %s\n", state)
-		return func(sctx context.Context, s State, opts ...StateOption) (State, error) {
-			sctx = logger.NewContext(sctx, logger.DefaultLogger.Fields("state", s.Name()))
-			return next(sctx, s, opts...)
-		}
 	}
-
+	f := New(InitialState("1"), HookBefore(pfb), HookAfter(pfa))
-	f := NewFSM(InitialState("1"), WrapState(wrapper))
+	f1 := func(_ context.Context, req interface{}, _ ...StateOption) (string, interface{}, error) {
-	f1 := func(sctx context.Context, s State, opts ...StateOption) (State, error) {
+		args := req.(map[string]interface{})
-		_, 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 &state{name: "", body: map[string]interface{}{"response": "state1"}}, nil
+		return "2", map[string]interface{}{"response": "test2"}, nil
 	}
-	f2 := func(sctx context.Context, s State, opts ...StateOption) (State, error) {
+	f2 := func(_ context.Context, req interface{}, _ ...StateOption) (string, interface{}, error) {
-		_, ok := logger.FromContext(sctx)
+		args := req.(map[string]interface{})
-		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 &state{name: "", body: map[string]interface{}{"response": "state2"}}, nil
+		return "", map[string]interface{}{"response": "test"}, nil
 	}
-	f3 := func(sctx context.Context, s State, opts ...StateOption) (State, error) {
+	f3 := func(_ context.Context, req interface{}, _ ...StateOption) (string, interface{}, error) {
-		_, ok := logger.FromContext(sctx)
+		args := req.(map[string]interface{})
-		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 &state{name: StateEnd, body: map[string]interface{}{"response": "state3"}}, nil
+		return StateEnd, map[string]interface{}{"response": "test_last"}, nil
 	}
 	f.State("1", f1)
 	f.State("2", f2)
 	f.State("3", f3)
-	rsp, err := f.Start(ctx, map[string]interface{}{"request": "state"})
+	rsp, err := f.Start(ctx, map[string]interface{}{"request": "test1"})
 	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 != "state3" {
+	} else if v != "test_last" {
 		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

@@ -1,52 +0,0 @@
-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

@@ -1,43 +1,13 @@
 module go.unistack.org/micro/v3
 
-go 1.23.4
+go 1.16
 
 require (
-	dario.cat/mergo v1.0.1
+	github.com/google/go-cmp v0.5.7 // indirect
-	github.com/DATA-DOG/go-sqlmock v1.5.0
+	github.com/imdario/mergo v0.3.13
-	github.com/KimMachineGun/automemlimit v0.6.1
+	github.com/kr/pretty v0.2.1 // indirect
-	github.com/ash3in/uuidv8 v1.0.1
+	github.com/kr/text v0.2.0 // indirect
-	github.com/google/uuid v1.6.0
-	github.com/matoous/go-nanoid v1.5.1
 	github.com/patrickmn/go-cache v2.1.0+incompatible
-	github.com/silas/dag v0.0.0-20220518035006-a7e85ada93c5
+	github.com/silas/dag v0.0.0-20211117232152-9d50aa809f35
-	go.uber.org/automaxprocs v1.6.0
+	go.unistack.org/micro-proto/v3 v3.3.1
-	go.unistack.org/micro-proto/v3 v3.4.1
-	golang.org/x/sync v0.10.0
-	google.golang.org/grpc v1.68.1
-	google.golang.org/protobuf v1.35.2
-	gopkg.in/yaml.v3 v3.0.1
-)
-
-require (
-	github.com/cilium/ebpf v0.16.0 // indirect
-	github.com/containerd/cgroups/v3 v3.0.4 // indirect
-	github.com/containerd/log v0.1.0 // indirect
-	github.com/coreos/go-systemd/v22 v22.5.0 // indirect
-	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
-	github.com/docker/go-units v0.5.0 // indirect
-	github.com/godbus/dbus/v5 v5.1.0 // indirect
-	github.com/moby/sys/userns v0.1.0 // indirect
-	github.com/opencontainers/runtime-spec v1.2.0 // indirect
-	github.com/pbnjay/memory v0.0.0-20210728143218-7b4eea64cf58 // indirect
-	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
-	github.com/rogpeppe/go-internal v1.13.1 // indirect
-	github.com/sirupsen/logrus v1.9.3 // indirect
-	github.com/stretchr/testify v1.10.0 // indirect
-	go.uber.org/goleak v1.3.0 // indirect
-	golang.org/x/exp v0.0.0-20241210194714-1829a127f884 // indirect
-	golang.org/x/net v0.32.0 // indirect
-	golang.org/x/sys v0.28.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20241209162323-e6fa225c2576 // indirect
-	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c // indirect
 )

go.sum

@@ -1,102 +1,160 @@
-dario.cat/mergo v1.0.1 h1:Ra4+bf83h2ztPIQYNP99R6m+Y7KfnARDfID+a+vLl4s=
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-dario.cat/mergo v1.0.1/go.mod h1:uNxQE+84aUszobStD9th8a29P2fMDhsBdgRYvZOxGmk=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-github.com/DATA-DOG/go-sqlmock v1.5.0 h1:Shsta01QNfFxHCfpW6YH2STWB0MudeXXEWMr20OEh60=
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/DATA-DOG/go-sqlmock v1.5.0/go.mod h1:f/Ixk793poVmq4qj/V1dPUg2JEAKC73Q5eFN3EC/SaM=
+github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
-github.com/KimMachineGun/automemlimit v0.6.1 h1:ILa9j1onAAMadBsyyUJv5cack8Y1WT26yLj/V+ulKp8=
+github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
-github.com/KimMachineGun/automemlimit v0.6.1/go.mod h1:T7xYht7B8r6AG/AqFcUdc7fzd2bIdBKmepfP2S1svPY=
+github.com/buger/jsonparser v1.1.1/go.mod h1:6RYKKt7H4d4+iWqouImQ9R2FZql3VbhNgx27UK13J/0=
-github.com/ash3in/uuidv8 v1.0.1 h1:dIq1XRkWT8lGA7N5s7WRTB4V3k49WTBLvILz7aCLp80=
+github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
-github.com/ash3in/uuidv8 v1.0.1/go.mod h1:EoyUgCtxNBnrnpc9efw5rVN1cQ+LFGCoJiFuD6maOMw=
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logger/context.go

@@ -13,15 +13,6 @@ func FromContext(ctx context.Context) (Logger, bool) {
 	return l, ok
 }
 
-// MustContext returns logger from passed context or DefaultLogger if empty
-func MustContext(ctx context.Context) Logger {
-	l, ok := FromContext(ctx)
-	if !ok {
-		panic("missing logger")
-	}
-	return l
-}
-
 // NewContext stores logger into passed context
 func NewContext(ctx context.Context, l Logger) context.Context {
 	if ctx == nil {

logger/default.go

@@ -0,0 +1,243 @@
+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

@@ -1,19 +1,18 @@
 // Package logger provides a log interface
-package logger
+package logger // import "go.unistack.org/micro/v3/logger"
 
 import (
 	"context"
+	"os"
 )
 
-type ContextAttrFunc func(ctx context.Context) []interface{}
-
-var DefaultContextAttrFuncs []ContextAttrFunc
-
 var (
 	// DefaultLogger variable
-	DefaultLogger = NewLogger()
+	DefaultLogger = NewLogger(WithLevel(ParseLevel(os.Getenv("MICRO_LOG_LEVEL"))))
 	// DefaultLevel used by logger
 	DefaultLevel = InfoLevel
+	// DefaultCallerSkipCount used by logger
+	DefaultCallerSkipCount = 2
 )
 
 // Logger is a generic logging interface
@@ -31,24 +30,111 @@ type Logger interface {
 	// Fields set fields to always be logged with keyval pairs
 	Fields(fields ...interface{}) Logger
 	// Info level message
-	Info(ctx context.Context, msg string, args ...interface{})
+	Info(ctx context.Context, args ...interface{})
 	// Trace level message
-	Trace(ctx context.Context, msg string, args ...interface{})
+	Trace(ctx context.Context, args ...interface{})
 	// Debug level message
-	Debug(ctx context.Context, msg string, args ...interface{})
+	Debug(ctx context.Context, args ...interface{})
 	// Warn level message
-	Warn(ctx context.Context, msg string, args ...interface{})
+	Warn(ctx context.Context, args ...interface{})
 	// Error level message
-	Error(ctx context.Context, msg string, args ...interface{})
+	Error(ctx context.Context, args ...interface{})
 	// Fatal level message
-	Fatal(ctx context.Context, msg string, args ...interface{})
+	Fatal(ctx context.Context, args ...interface{})
+	// Infof level message
+	Infof(ctx context.Context, msg string, args ...interface{})
+	// Tracef level message
+	Tracef(ctx context.Context, msg string, args ...interface{})
+	// Debug level message
+	Debugf(ctx context.Context, msg string, args ...interface{})
+	// Warn level message
+	Warnf(ctx context.Context, msg string, args ...interface{})
+	// Error level message
+	Errorf(ctx context.Context, msg string, args ...interface{})
+	// Fatal level message
+	Fatalf(ctx context.Context, msg string, args ...interface{})
 	// Log logs message with needed level
-	Log(ctx context.Context, level Level, msg string, args ...interface{})
+	Log(ctx context.Context, level Level, args ...interface{})
-	// Name returns broker instance name
+	// Logf logs message with needed level
-	Name() string
+	Logf(ctx context.Context, level Level, msg string, args ...interface{})
-	// String returns the type of logger
+	// String returns the name of logger
 	String() 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...)
+}
+
+// Error writes msg to default logger on error level
+func Error(ctx context.Context, args ...interface{}) {
+	DefaultLogger.Error(ctx, args...)
+}
+
+// Debug writes msg to default logger on debug level
+func Debug(ctx context.Context, args ...interface{}) {
+	DefaultLogger.Debug(ctx, args...)
+}
+
+// Warn writes msg to default logger on warn level
+func Warn(ctx context.Context, args ...interface{}) {
+	DefaultLogger.Warn(ctx, args...)
+}
+
+// Trace writes msg to default logger on trace level
+func Trace(ctx context.Context, args ...interface{}) {
+	DefaultLogger.Trace(ctx, args...)
+}
+
+// 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...)
+}
+
+// V returns true if passed level enabled in default logger
+func V(level Level) bool {
+	return DefaultLogger.V(level)
+}
+
+// Init initialize logger
+func Init(opts ...Option) error {
+	return DefaultLogger.Init(opts...)
+}
+
+// Fields create logger with specific fields
+func Fields(fields ...interface{}) Logger {
+	return DefaultLogger.Fields(fields...)
+}

logger/logger_test.go

@@ -0,0 +1,148 @@
+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

@@ -1,78 +0,0 @@
-package logger
-
-import (
-	"context"
-)
-
-const (
-	defaultCallerSkipCount = 2
-)
-
-type noopLogger struct {
-	opts Options
-}
-
-func NewLogger(opts ...Option) Logger {
-	options := NewOptions(opts...)
-	options.CallerSkipCount = defaultCallerSkipCount
-	return &noopLogger{opts: options}
-}
-
-func (l *noopLogger) V(_ Level) bool {
-	return false
-}
-
-func (l *noopLogger) Level(_ Level) {
-}
-
-func (l *noopLogger) Name() string {
-	return l.opts.Name
-}
-
-func (l *noopLogger) Init(opts ...Option) error {
-	for _, o := range opts {
-		o(&l.opts)
-	}
-	return nil
-}
-
-func (l *noopLogger) Clone(opts ...Option) Logger {
-	nl := &noopLogger{opts: l.opts}
-	for _, o := range opts {
-		o(&nl.opts)
-	}
-	return nl
-}
-
-func (l *noopLogger) Fields(_ ...interface{}) Logger {
-	return l
-}
-
-func (l *noopLogger) Options() Options {
-	return l.opts
-}
-
-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

@@ -3,115 +3,45 @@ package logger
 import (
 	"context"
 	"io"
-	"log/slog"
 	"os"
-	"slices"
-	"time"
-
-	"go.unistack.org/micro/v3/meter"
 )
 
-// Option func signature
+// Option func
 type Option func(*Options)
 
 // Options holds logger options
 type Options struct {
-	// TimeKey is the key used for the time of the log call
-	TimeKey string
-	// LevelKey is the key used for the level of the log call
-	LevelKey string
-	// ErroreKey is the key used for the error of the log call
-	ErrorKey string
-	// MessageKey is the key used for the message of the log call
-	MessageKey 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
-	// Name holds the logger name
-	Name string
 	// Out holds the output writer
 	Out io.Writer
 	// Context holds exernal options
 	Context context.Context
-	// Meter used to count logs for specific level
-	Meter meter.Meter
-	// TimeFunc used to obtain current time
-	TimeFunc func() time.Time
 	// Fields holds additional metadata
 	Fields []interface{}
-	// ContextAttrFuncs contains funcs that executed before log func on context
+	// Name holds the logger name
-	ContextAttrFuncs []ContextAttrFunc
+	Name string
-	// callerSkipCount number of frmaes to skip
+	// Wrappers logger wrapper that called before actual Log/Logf function
-	CallerSkipCount int
+	Wrappers []Wrapper
 	// The logging level the logger should log
 	Level Level
-	// AddSource enabled writing source file and position in log
+	// CallerSkipCount number of frmaes to skip
-	AddSource bool
+	CallerSkipCount int
-	// AddStacktrace controls writing of stacktaces on error
-	AddStacktrace bool
-	// DedupKeys deduplicate keys in log output
-	DedupKeys bool
 }
 
 // NewOptions creates new options struct
 func NewOptions(opts ...Option) Options {
 	options := Options{
-		Level:            DefaultLevel,
+		Level:           DefaultLevel,
-		Fields:           make([]interface{}, 0, 6),
+		Fields:          make([]interface{}, 0, 6),
-		Out:              os.Stderr,
+		Out:             os.Stderr,
-		Context:          context.Background(),
+		CallerSkipCount: DefaultCallerSkipCount,
-		ContextAttrFuncs: DefaultContextAttrFuncs,
+		Context:         context.Background(),
-		AddSource:        true,
-		TimeFunc:         time.Now,
-		Meter:            meter.DefaultMeter,
 	}
-
-	WithMicroKeys()(&options)
-
 	for _, o := range opts {
 		o(&options)
 	}
-
 	return options
 }
 
-// WithContextAttrFuncs appends default funcs for the context attrs filler
-func WithContextAttrFuncs(fncs ...ContextAttrFunc) Option {
-	return func(o *Options) {
-		o.ContextAttrFuncs = append(o.ContextAttrFuncs, fncs...)
-	}
-}
-
-// WithDedupKeys dont log duplicate keys
-func WithDedupKeys(b bool) Option {
-	return func(o *Options) {
-		o.DedupKeys = b
-	}
-}
-
-// WithAddFields add fields for the logger
-func WithAddFields(fields ...interface{}) Option {
-	return func(o *Options) {
-		if o.DedupKeys {
-			for i := 0; i < len(o.Fields); i += 2 {
-				for j := 0; j < len(fields); j += 2 {
-					iv, iok := o.Fields[i].(string)
-					jv, jok := fields[j].(string)
-					if iok && jok && iv == jv {
-						fields = slices.Delete(fields, j, j+2)
-					}
-				}
-			}
-			if len(fields) > 0 {
-				o.Fields = append(o.Fields, fields...)
-			}
-		} else {
-			o.Fields = append(o.Fields, fields...)
-		}
-	}
-}
-
 // WithFields set default fields for the logger
 func WithFields(fields ...interface{}) Option {
 	return func(o *Options) {
@@ -133,17 +63,10 @@ func WithOutput(out io.Writer) Option {
 	}
 }
 
-// WithAddStacktrace controls writing stacktrace on error
+// WithCallerSkipCount set frame count to skip
-func WithAddStacktrace(v bool) Option {
+func WithCallerSkipCount(c int) Option {
 	return func(o *Options) {
-		o.AddStacktrace = v
+		o.CallerSkipCount = c
-	}
-}
-
-// WithAddSource controls writing source file and pos in log
-func WithAddSource(v bool) Option {
-	return func(o *Options) {
-		o.AddSource = v
 	}
 }
 
@@ -161,69 +84,9 @@ func WithName(n string) Option {
 	}
 }
 
-// WithMeter sets the meter
+// WrapLogger adds a logger Wrapper to a list of options passed into the logger
-func WithMeter(m meter.Meter) Option {
+func WrapLogger(w Wrapper) Option {
 	return func(o *Options) {
-		o.Meter = m
+		o.Wrappers = append(o.Wrappers, w)
-	}
-}
-
-// WithTimeFunc sets the func to obtain current time
-func WithTimeFunc(fn func() time.Time) Option {
-	return func(o *Options) {
-		o.TimeFunc = fn
-	}
-}
-
-func WithZapKeys() Option {
-	return func(o *Options) {
-		o.TimeKey = "@timestamp"
-		o.LevelKey = slog.LevelKey
-		o.MessageKey = slog.MessageKey
-		o.SourceKey = "caller"
-		o.StacktraceKey = "stacktrace"
-		o.ErrorKey = "error"
-	}
-}
-
-func WithZerologKeys() Option {
-	return func(o *Options) {
-		o.TimeKey = slog.TimeKey
-		o.LevelKey = slog.LevelKey
-		o.MessageKey = "message"
-		o.SourceKey = "caller"
-		o.StacktraceKey = "stacktrace"
-		o.ErrorKey = "error"
-	}
-}
-
-func WithSlogKeys() Option {
-	return func(o *Options) {
-		o.TimeKey = slog.TimeKey
-		o.LevelKey = slog.LevelKey
-		o.MessageKey = slog.MessageKey
-		o.SourceKey = slog.SourceKey
-		o.StacktraceKey = "stacktrace"
-		o.ErrorKey = "error"
-	}
-}
-
-func WithMicroKeys() Option {
-	return func(o *Options) {
-		o.TimeKey = "timestamp"
-		o.LevelKey = slog.LevelKey
-		o.MessageKey = slog.MessageKey
-		o.SourceKey = "caller"
-		o.StacktraceKey = "stacktrace"
-		o.ErrorKey = "error"
-	}
-}
-
-// WithAddCallerSkipCount add skip count for copy logger
-func WithAddCallerSkipCount(n int) Option {
-	return func(o *Options) {
-		if n > 0 {
-			o.CallerSkipCount += n
-		}
 	}
 }

logger/slog/slog.go

@@ -1,373 +0,0 @@
-package slog
-
-import (
-	"context"
-	"io"
-	"log/slog"
-	"os"
-	"reflect"
-	"regexp"
-	"runtime"
-	"strconv"
-	"sync"
-	"sync/atomic"
-	"time"
-
-	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v3/semconv"
-	"go.unistack.org/micro/v3/tracer"
-)
-
-const (
-	badKey = "!BADKEY"
-	// defaultCallerSkipCount used by logger
-	defaultCallerSkipCount = 3
-)
-
-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")
-)
-
-type wrapper struct {
-	h     slog.Handler
-	level atomic.Int64
-}
-
-func (h *wrapper) Enabled(ctx context.Context, level slog.Level) bool {
-	return level >= slog.Level(int(h.level.Load()))
-}
-
-func (h *wrapper) Handle(ctx context.Context, rec slog.Record) error {
-	return h.h.Handle(ctx, rec)
-}
-
-func (h *wrapper) WithAttrs(attrs []slog.Attr) slog.Handler {
-	return h.h.WithAttrs(attrs)
-}
-
-func (h *wrapper) WithGroup(name string) slog.Handler {
-	return h.h.WithGroup(name)
-}
-
-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 {
-	handler *wrapper
-	opts    logger.Options
-	mu      sync.RWMutex
-}
-
-func (s *slogLogger) Clone(opts ...logger.Option) logger.Logger {
-	s.mu.RLock()
-	options := s.opts
-	s.mu.RUnlock()
-
-	for _, o := range opts {
-		o(&options)
-	}
-
-	if len(options.ContextAttrFuncs) == 0 {
-		options.ContextAttrFuncs = logger.DefaultContextAttrFuncs
-	}
-
-	attrs, _ := s.argsAttrs(options.Fields)
-	l := &slogLogger{
-		handler: &wrapper{h: s.handler.h.WithAttrs(attrs)},
-		opts:    options,
-	}
-	l.handler.level.Store(int64(loggerToSlogLevel(options.Level)))
-
-	return l
-}
-
-func (s *slogLogger) V(level logger.Level) bool {
-	s.mu.Lock()
-	v := s.opts.Level.Enabled(level)
-	s.mu.Unlock()
-	return v
-}
-
-func (s *slogLogger) Level(level logger.Level) {
-	s.mu.Lock()
-	s.opts.Level = level
-	s.handler.level.Store(int64(loggerToSlogLevel(level)))
-	s.mu.Unlock()
-}
-
-func (s *slogLogger) Options() logger.Options {
-	return s.opts
-}
-
-func (s *slogLogger) Fields(fields ...interface{}) logger.Logger {
-	s.mu.RLock()
-	options := s.opts
-	s.mu.RUnlock()
-
-	l := &slogLogger{opts: options}
-	logger.WithAddFields(fields...)(&l.opts)
-
-	if len(options.ContextAttrFuncs) == 0 {
-		options.ContextAttrFuncs = logger.DefaultContextAttrFuncs
-	}
-
-	attrs, _ := s.argsAttrs(fields)
-	l.handler = &wrapper{h: s.handler.h.WithAttrs(attrs)}
-	l.handler.level.Store(int64(loggerToSlogLevel(l.opts.Level)))
-
-	return l
-}
-
-func (s *slogLogger) Init(opts ...logger.Option) error {
-	s.mu.Lock()
-
-	for _, o := range opts {
-		o(&s.opts)
-	}
-
-	if len(s.opts.ContextAttrFuncs) == 0 {
-		s.opts.ContextAttrFuncs = logger.DefaultContextAttrFuncs
-	}
-
-	handleOpt := &slog.HandlerOptions{
-		ReplaceAttr: s.renameAttr,
-		Level:       loggerToSlogLevel(logger.TraceLevel),
-		AddSource:   s.opts.AddSource,
-	}
-
-	attrs, _ := s.argsAttrs(s.opts.Fields)
-
-	var h slog.Handler
-	if s.opts.Context != nil {
-		if v, ok := s.opts.Context.Value(handlerKey{}).(slog.Handler); ok && v != nil {
-			h = v
-		}
-
-		if fn := s.opts.Context.Value(handlerFnKey{}); fn != nil {
-			if rfn := reflect.ValueOf(fn); rfn.Kind() == reflect.Func {
-				if ret := rfn.Call([]reflect.Value{reflect.ValueOf(s.opts.Out), reflect.ValueOf(handleOpt)}); len(ret) == 1 {
-					if iface, ok := ret[0].Interface().(slog.Handler); ok && iface != nil {
-						h = iface
-					}
-				}
-			}
-		}
-	}
-
-	if h == nil {
-		h = slog.NewJSONHandler(s.opts.Out, handleOpt)
-	}
-
-	s.handler = &wrapper{h: h.WithAttrs(attrs)}
-	s.handler.level.Store(int64(loggerToSlogLevel(s.opts.Level)))
-	s.mu.Unlock()
-
-	return nil
-}
-
-func (s *slogLogger) Log(ctx context.Context, lvl logger.Level, msg string, attrs ...interface{}) {
-	s.printLog(ctx, lvl, msg, attrs...)
-}
-
-func (s *slogLogger) Info(ctx context.Context, msg string, attrs ...interface{}) {
-	s.printLog(ctx, logger.InfoLevel, msg, attrs...)
-}
-
-func (s *slogLogger) Debug(ctx context.Context, msg string, attrs ...interface{}) {
-	s.printLog(ctx, logger.DebugLevel, msg, attrs...)
-}
-
-func (s *slogLogger) Trace(ctx context.Context, msg string, attrs ...interface{}) {
-	s.printLog(ctx, logger.TraceLevel, msg, attrs...)
-}
-
-func (s *slogLogger) Error(ctx context.Context, msg string, attrs ...interface{}) {
-	s.printLog(ctx, logger.ErrorLevel, msg, attrs...)
-}
-
-func (s *slogLogger) Fatal(ctx context.Context, msg string, attrs ...interface{}) {
-	s.printLog(ctx, logger.FatalLevel, msg, attrs...)
-	if closer, ok := s.opts.Out.(io.Closer); ok {
-		closer.Close()
-	}
-	time.Sleep(1 * time.Second)
-	os.Exit(1)
-}
-
-func (s *slogLogger) Warn(ctx context.Context, msg string, attrs ...interface{}) {
-	s.printLog(ctx, logger.WarnLevel, msg, attrs...)
-}
-
-func (s *slogLogger) Name() string {
-	return s.opts.Name
-}
-
-func (s *slogLogger) String() string {
-	return "slog"
-}
-
-func (s *slogLogger) printLog(ctx context.Context, lvl logger.Level, msg string, args ...interface{}) {
-	if !s.V(lvl) {
-		return
-	}
-	var argError error
-
-	s.opts.Meter.Counter(semconv.LoggerMessageTotal, "level", lvl.String()).Inc()
-
-	attrs, err := s.argsAttrs(args)
-	if err != nil {
-		argError = err
-	}
-	if argError != nil {
-		if span, ok := tracer.SpanFromContext(ctx); ok {
-			span.SetStatus(tracer.SpanStatusError, argError.Error())
-		}
-	}
-
-	for _, fn := range s.opts.ContextAttrFuncs {
-		ctxAttrs, err := s.argsAttrs(fn(ctx))
-		if err != nil {
-			argError = err
-		}
-		attrs = append(attrs, ctxAttrs...)
-	}
-	if argError != nil {
-		if span, ok := tracer.SpanFromContext(ctx); ok {
-			span.SetStatus(tracer.SpanStatusError, argError.Error())
-		}
-	}
-
-	if (s.opts.AddStacktrace || lvl == logger.FatalLevel) || (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]))
-			}
-		}
-	}
-
-	var pcs [1]uintptr
-	runtime.Callers(s.opts.CallerSkipCount, pcs[:]) // skip [Callers, printLog, LogLvlMethod]
-	r := slog.NewRecord(s.opts.TimeFunc(), loggerToSlogLevel(lvl), msg, pcs[0])
-	r.AddAttrs(attrs...)
-	_ = s.handler.Handle(ctx, r)
-}
-
-func NewLogger(opts ...logger.Option) logger.Logger {
-	s := &slogLogger{
-		opts: logger.NewOptions(opts...),
-	}
-	s.opts.CallerSkipCount = defaultCallerSkipCount
-
-	return s
-}
-
-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
-	}
-}
-
-func (s *slogLogger) argsAttrs(args []interface{}) ([]slog.Attr, error) {
-	attrs := make([]slog.Attr, 0, len(args))
-	var err error
-
-	for idx := 0; idx < len(args); idx++ {
-		switch arg := args[idx].(type) {
-		case slog.Attr:
-			attrs = append(attrs, arg)
-		case string:
-			if idx+1 < len(args) {
-				attrs = append(attrs, slog.Any(arg, args[idx+1]))
-				idx++
-			} else {
-				attrs = append(attrs, slog.String(badKey, arg))
-			}
-		case error:
-			attrs = append(attrs, slog.String(s.opts.ErrorKey, arg.Error()))
-			err = arg
-		}
-	}
-
-	return attrs, err
-}
-
-type handlerKey struct{}
-
-func WithHandler(h slog.Handler) logger.Option {
-	return logger.SetOption(handlerKey{}, h)
-}
-
-type handlerFnKey struct{}
-
-func WithHandlerFunc(fn any) logger.Option {
-	return logger.SetOption(handlerFnKey{}, fn)
-}

logger/slog/slog_test.go

@@ -1,409 +0,0 @@
-package slog
-
-import (
-	"bytes"
-	"context"
-	"errors"
-	"fmt"
-	"log"
-	"log/slog"
-	"strings"
-	"testing"
-
-	"github.com/google/uuid"
-	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v3/metadata"
-)
-
-func TestStacktrace(t *testing.T) {
-	ctx := context.TODO()
-	buf := bytes.NewBuffer(nil)
-	l := NewLogger(logger.WithLevel(logger.ErrorLevel), logger.WithOutput(buf),
-		WithHandlerFunc(slog.NewTextHandler),
-		logger.WithAddStacktrace(true),
-	)
-	if err := l.Init(logger.WithFields("key1", "val1")); err != nil {
-		t.Fatal(err)
-	}
-
-	l.Error(ctx, "msg1", errors.New("err"))
-
-	if !bytes.Contains(buf.Bytes(), []byte(`slog_test.go:29`)) {
-		t.Fatalf("logger error not works, buf contains: %s", buf.Bytes())
-	}
-}
-
-func TestWithFields(t *testing.T) {
-	ctx := context.TODO()
-	buf := bytes.NewBuffer(nil)
-	l := NewLogger(logger.WithLevel(logger.InfoLevel), logger.WithOutput(buf),
-		WithHandlerFunc(slog.NewTextHandler),
-		logger.WithDedupKeys(true),
-	)
-	if err := l.Init(logger.WithFields("key1", "val1")); err != nil {
-		t.Fatal(err)
-	}
-
-	l.Info(ctx, "msg1")
-
-	l = l.Fields("key1", "val2")
-
-	l.Info(ctx, "msg2")
-
-	if !bytes.Contains(buf.Bytes(), []byte(`msg=msg2 key1=val1`)) {
-		t.Fatalf("logger error not works, buf contains: %s", buf.Bytes())
-	}
-}
-
-func TestWithDedupKeysWithAddFields(t *testing.T) {
-	ctx := context.TODO()
-	buf := bytes.NewBuffer(nil)
-	l := NewLogger(logger.WithLevel(logger.InfoLevel), logger.WithOutput(buf),
-		WithHandlerFunc(slog.NewTextHandler),
-		logger.WithDedupKeys(true),
-	)
-	if err := l.Init(logger.WithFields("key1", "val1")); err != nil {
-		t.Fatal(err)
-	}
-
-	l.Info(ctx, "msg1")
-
-	if err := l.Init(logger.WithAddFields("key2", "val2")); err != nil {
-		t.Fatal(err)
-	}
-
-	l.Info(ctx, "msg2")
-
-	if err := l.Init(logger.WithAddFields("key2", "val3", "key1", "val4")); err != nil {
-		t.Fatal(err)
-	}
-
-	l.Info(ctx, "msg3")
-
-	if !bytes.Contains(buf.Bytes(), []byte(`msg=msg3 key1=val1 key2=val2`)) {
-		t.Fatalf("logger error not works, buf contains: %s", buf.Bytes())
-	}
-}
-
-func TestWithHandlerFunc(t *testing.T) {
-	ctx := context.TODO()
-	buf := bytes.NewBuffer(nil)
-	l := NewLogger(logger.WithLevel(logger.InfoLevel), logger.WithOutput(buf),
-		WithHandlerFunc(slog.NewTextHandler),
-	)
-	if err := l.Init(); err != nil {
-		t.Fatal(err)
-	}
-
-	l.Info(ctx, "msg1")
-
-	if !bytes.Contains(buf.Bytes(), []byte(`msg=msg1`)) {
-		t.Fatalf("logger error not works, buf contains: %s", buf.Bytes())
-	}
-}
-
-func TestWithAddFields(t *testing.T) {
-	ctx := context.TODO()
-	buf := bytes.NewBuffer(nil)
-	l := NewLogger(logger.WithLevel(logger.InfoLevel), logger.WithOutput(buf))
-	if err := l.Init(); err != nil {
-		t.Fatal(err)
-	}
-
-	l.Info(ctx, "msg1")
-
-	if err := l.Init(logger.WithAddFields("key1", "val1")); err != nil {
-		t.Fatal(err)
-	}
-	l.Info(ctx, "msg2")
-
-	if err := l.Init(logger.WithAddFields("key2", "val2")); err != nil {
-		t.Fatal(err)
-	}
-	l.Info(ctx, "msg3")
-
-	if !bytes.Contains(buf.Bytes(), []byte(`"key1"`)) {
-		t.Fatalf("logger error not works, buf contains: %s", buf.Bytes())
-	}
-	if !bytes.Contains(buf.Bytes(), []byte(`"key2"`)) {
-		t.Fatalf("logger error not works, buf contains: %s", buf.Bytes())
-	}
-}
-
-func TestMultipleFieldsWithLevel(t *testing.T) {
-	ctx := context.TODO()
-	buf := bytes.NewBuffer(nil)
-	l := NewLogger(logger.WithLevel(logger.InfoLevel), logger.WithOutput(buf))
-	if err := l.Init(); err != nil {
-		t.Fatal(err)
-	}
-
-	l = l.Fields("key", "val")
-
-	l.Info(ctx, "msg1")
-	nl := l.Clone(logger.WithLevel(logger.DebugLevel))
-	nl.Debug(ctx, "msg2")
-	l.Debug(ctx, "msg3")
-	if !bytes.Contains(buf.Bytes(), []byte(`"key":"val"`)) {
-		t.Fatalf("logger error not works, buf contains: %s", buf.Bytes())
-	}
-	if !bytes.Contains(buf.Bytes(), []byte(`"msg1"`)) {
-		t.Fatalf("logger error not works, buf contains: %s", buf.Bytes())
-	}
-	if !bytes.Contains(buf.Bytes(), []byte(`"msg2"`)) {
-		t.Fatalf("logger error not works, buf contains: %s", buf.Bytes())
-	}
-	if bytes.Contains(buf.Bytes(), []byte(`"msg3"`)) {
-		t.Fatalf("logger error not works, buf contains: %s", buf.Bytes())
-	}
-}
-
-func TestMultipleFields(t *testing.T) {
-	ctx := context.TODO()
-	buf := bytes.NewBuffer(nil)
-	l := NewLogger(logger.WithLevel(logger.InfoLevel), logger.WithOutput(buf))
-	if err := l.Init(); err != nil {
-		t.Fatal(err)
-	}
-
-	l = l.Fields("key", "val")
-
-	l = l.Fields("key1", "val1")
-
-	l.Info(ctx, "msg")
-
-	if !bytes.Contains(buf.Bytes(), []byte(`"key":"val"`)) {
-		t.Fatalf("logger error not works, buf contains: %s", buf.Bytes())
-	}
-	if !bytes.Contains(buf.Bytes(), []byte(`"key1":"val1"`)) {
-		t.Fatalf("logger error not works, buf contains: %s", buf.Bytes())
-	}
-}
-
-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, "message", fmt.Errorf("error message"))
-	if !bytes.Contains(buf.Bytes(), []byte(`"stacktrace":"`)) {
-		t.Fatalf("logger stacktrace not works, buf contains: %s", buf.Bytes())
-	}
-	if !bytes.Contains(buf.Bytes(), []byte(`"error":"`)) {
-		t.Fatalf("logger error not works, buf contains: %s", buf.Bytes())
-	}
-}
-
-func TestErrorf(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(logger.WithContextAttrFuncs(func(_ context.Context) []interface{} {
-		return nil
-	})); err != nil {
-		t.Fatal(err)
-	}
-
-	l.Log(ctx, logger.ErrorLevel, "message", errors.New("error msg"))
-
-	l.Log(ctx, logger.ErrorLevel, "", errors.New("error msg"))
-	if !bytes.Contains(buf.Bytes(), []byte(`"error":"error msg"`)) {
-		t.Fatalf("logger error not works, buf contains: %s", buf.Bytes())
-	}
-
-	if !bytes.Contains(buf.Bytes(), []byte(`"stacktrace":"`)) {
-		t.Fatalf("logger stacktrace not works, buf contains: %s", buf.Bytes())
-	}
-	if !bytes.Contains(buf.Bytes(), []byte(`"error":"`)) {
-		t.Fatalf("logger error 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.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(logger.WithLevel(logger.TraceLevel), logger.WithOutput(buf))
-	if err := l.Init(); err != nil {
-		t.Fatal(err)
-	}
-
-	nl := l.Fields("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.Fields("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())
-	}
-
-	l.Info(ctx, "test", "uncorrected number attributes")
-	if !bytes.Contains(buf.Bytes(), []byte(`"!BADKEY":"uncorrected number attributes"`)) {
-		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.Fields("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())
-	}
-}
-
-func Test_WithContextAttrFunc(t *testing.T) {
-	loggerContextAttrFuncs := []logger.ContextAttrFunc{
-		func(ctx context.Context) []interface{} {
-			md, ok := metadata.FromIncomingContext(ctx)
-			if !ok {
-				return nil
-			}
-			attrs := make([]interface{}, 0, 10)
-			for k, v := range md {
-				switch k {
-				case "X-Request-Id", "Phone", "External-Id", "Source-Service", "X-App-Install-Id", "Client-Id", "Client-Ip":
-					attrs = append(attrs, strings.ToLower(k), v)
-				}
-			}
-			return attrs
-		},
-	}
-
-	logger.DefaultContextAttrFuncs = append(logger.DefaultContextAttrFuncs, loggerContextAttrFuncs...)
-
-	ctx := context.TODO()
-	ctx = metadata.AppendIncomingContext(ctx, "X-Request-Id", uuid.New().String(),
-		"Source-Service", "Test-System")
-
-	buf := bytes.NewBuffer(nil)
-	l := NewLogger(logger.WithLevel(logger.TraceLevel), logger.WithOutput(buf))
-	if err := l.Init(); err != nil {
-		t.Fatal(err)
-	}
-
-	l.Info(ctx, "test message")
-	if !(bytes.Contains(buf.Bytes(), []byte(`"level":"info"`)) && bytes.Contains(buf.Bytes(), []byte(`"msg":"test message"`))) {
-		t.Fatalf("logger info, buf %s", buf.Bytes())
-	}
-	if !(bytes.Contains(buf.Bytes(), []byte(`"x-request-id":"`))) {
-		t.Fatalf("logger info, buf %s", buf.Bytes())
-	}
-	if !(bytes.Contains(buf.Bytes(), []byte(`"source-service":"Test-System"`))) {
-		t.Fatalf("logger info, buf %s", buf.Bytes())
-	}
-	buf.Reset()
-	imd, _ := metadata.FromIncomingContext(ctx)
-	l.Info(ctx, "test message1")
-	imd.Set("Source-Service", "Test-System2")
-	l.Info(ctx, "test message2")
-
-	// t.Logf("xxx %s", buf.Bytes())
-}

logger/unwrap/unwrap.go

@@ -35,37 +35,25 @@ var (
 	nilAngleBytes      = []byte("<nil>")
 	circularShortBytes = []byte("<shown>")
 	invalidAngleBytes  = []byte("<invalid>")
-	filteredBytes      = []byte("<filtered>")
+	openBracketBytes   = []byte("[")
-	// openBracketBytes   = []byte("[")
+	closeBracketBytes  = []byte("]")
-	// closeBracketBytes  = []byte("]")
+	percentBytes       = []byte("%")
-	percentBytes    = []byte("%")
+	precisionBytes     = []byte(".")
-	precisionBytes  = []byte(".")
+	openAngleBytes     = []byte("<")
-	openAngleBytes  = []byte("<")
+	closeAngleBytes    = []byte(">")
-	closeAngleBytes = []byte(">")
+	openMapBytes       = []byte("{")
-	openMapBytes    = []byte("{")
+	closeMapBytes      = []byte("}")
-	closeMapBytes   = []byte("}")
 )
 
-type protoMessage interface {
+type unwrap struct {
-	Reset()
+	val            interface{}
-	ProtoMessage()
+	s              fmt.State
+	depth          int
+	pointers       map[uintptr]int
+	opts           *Options
+	ignoreNextType bool
 }
 
-type Wrapper struct {
-	pointers map[uintptr]int
-	takeMap  map[int]bool
-
-	val  interface{}
-	s    fmt.State
-	opts *Options
-
-	depth            int
-	ignoreNextType   bool
-	protoWrapperType bool
-	sqlWrapperType   bool
-}
-
-// Options struct
 type Options struct {
 	Codec   codec.Codec
 	Indent  string
@@ -73,7 +61,6 @@ type Options struct {
 	Tagged  bool
 }
 
-// NewOptions creates new Options struct via provided args
 func NewOptions(opts ...Option) Options {
 	options := Options{
 		Indent:  " ",
@@ -85,45 +72,40 @@ 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) *Wrapper {
+func Unwrap(val interface{}, opts ...Option) *unwrap {
 	options := NewOptions(opts...)
-	return &Wrapper{val: val, opts: &options, pointers: make(map[uintptr]int), takeMap: make(map[int]bool)}
+	return &unwrap{val: val, opts: &options, pointers: make(map[uintptr]int)}
 }
 
-func (w *Wrapper) unpackValue(v reflect.Value) reflect.Value {
+func (f *unwrap) unpackValue(v reflect.Value) reflect.Value {
 	if v.Kind() == reflect.Interface {
-		w.ignoreNextType = false
+		f.ignoreNextType = false
 		if !v.IsNil() {
 			v = v.Elem()
 		}
@@ -132,19 +114,19 @@ func (w *Wrapper) unpackValue(v reflect.Value) reflect.Value {
 }
 
 // formatPtr handles formatting of pointers by indirecting them as necessary.
-func (w *Wrapper) formatPtr(v reflect.Value) {
+func (f *unwrap) formatPtr(v reflect.Value) {
 	// Display nil if top level pointer is nil.
-	showTypes := w.s.Flag('#')
+	showTypes := f.s.Flag('#')
-	if v.IsNil() && (!showTypes || w.ignoreNextType) {
+	if v.IsNil() && (!showTypes || f.ignoreNextType) {
-		_, _ = w.s.Write(nilAngleBytes)
+		_, _ = f.s.Write(nilAngleBytes)
 		return
 	}
 
 	// Remove pointers at or below the current depth from map used to detect
 	// circular refs.
-	for k, depth := range w.pointers {
+	for k, depth := range f.pointers {
-		if depth >= w.depth {
+		if depth >= f.depth {
-			delete(w.pointers, k)
+			delete(f.pointers, k)
 		}
 	}
 
@@ -166,12 +148,12 @@ func (w *Wrapper) formatPtr(v reflect.Value) {
 		indirects++
 		addr := ve.Pointer()
 		pointerChain = append(pointerChain, addr)
-		if pd, ok := w.pointers[addr]; ok && pd < w.depth {
+		if pd, ok := f.pointers[addr]; ok && pd < f.depth {
 			cycleFound = true
 			indirects--
 			break
 		}
-		w.pointers[addr] = w.depth
+		f.pointers[addr] = f.depth
 
 		ve = ve.Elem()
 		if ve.Kind() == reflect.Interface {
@@ -184,49 +166,51 @@ func (w *Wrapper) formatPtr(v reflect.Value) {
 	}
 
 	// Display type or indirection level depending on flags.
-	if showTypes && !w.ignoreNextType {
+	if showTypes && !f.ignoreNextType {
-		if w.depth > 0 {
+		if f.depth > 0 {
-			_, _ = w.s.Write(openParenBytes)
+			_, _ = f.s.Write(openParenBytes)
 		}
-		if w.depth > 0 {
+		if f.depth > 0 {
-			_, _ = w.s.Write(bytes.Repeat(asteriskBytes, indirects))
+			_, _ = f.s.Write(bytes.Repeat(asteriskBytes, indirects))
 		} else {
-			_, _ = w.s.Write(bytes.Repeat(ampBytes, indirects))
+			_, _ = f.s.Write(bytes.Repeat(ampBytes, indirects))
 		}
-		_, _ = w.s.Write([]byte(ve.Type().String()))
+		_, _ = f.s.Write([]byte(ve.Type().String()))
-		if w.depth > 0 {
+		if f.depth > 0 {
-			_, _ = w.s.Write(closeParenBytes)
+			_, _ = f.s.Write(closeParenBytes)
 		}
 	} else {
 		if nilFound || cycleFound {
 			indirects += strings.Count(ve.Type().String(), "*")
 		}
-		_, _ = w.s.Write(openAngleBytes)
+		_, _ = f.s.Write(openAngleBytes)
-		_, _ = w.s.Write([]byte(strings.Repeat("*", indirects)))
+		_, _ = f.s.Write([]byte(strings.Repeat("*", indirects)))
-		_, _ = w.s.Write(closeAngleBytes)
+		_, _ = f.s.Write(closeAngleBytes)
 	}
 
 	// Display pointer information depending on flags.
-	if w.s.Flag('+') && (len(pointerChain) > 0) {
+	if f.s.Flag('+') && (len(pointerChain) > 0) {
-		_, _ = w.s.Write(openParenBytes)
+		_, _ = f.s.Write(openParenBytes)
 		for i, addr := range pointerChain {
 			if i > 0 {
-				_, _ = w.s.Write(pointerChainBytes)
+				_, _ = f.s.Write(pointerChainBytes)
 			}
-			getHexPtr(w.s, addr)
+			getHexPtr(f.s, addr)
 		}
-		_, _ = w.s.Write(closeParenBytes)
+		_, _ = f.s.Write(closeParenBytes)
 	}
 
 	// Display dereferenced value.
 	switch {
 	case nilFound:
-		_, _ = w.s.Write(nilAngleBytes)
+		_, _ = f.s.Write(nilAngleBytes)
+
 	case cycleFound:
-		_, _ = w.s.Write(circularShortBytes)
+		_, _ = f.s.Write(circularShortBytes)
+
 	default:
-		w.ignoreNextType = true
+		f.ignoreNextType = true
-		w.format(ve)
+		f.format(ve)
 	}
 }
 
@@ -234,73 +218,113 @@ func (w *Wrapper) 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 (w *Wrapper) format(v reflect.Value) {
+func (f *unwrap) format(v reflect.Value) {
-	if w.opts.Codec != nil {
+	if f.opts.Codec != nil {
-		buf, err := w.opts.Codec.Marshal(v.Interface())
+		buf, err := f.opts.Codec.Marshal(v.Interface())
 		if err != nil {
-			_, _ = w.s.Write(invalidAngleBytes)
+			_, _ = f.s.Write(invalidAngleBytes)
 			return
 		}
-		_, _ = w.s.Write(buf)
+		_, _ = f.s.Write(buf)
 		return
 	}
-
 	// Handle invalid reflect values immediately.
 	kind := v.Kind()
 	if kind == reflect.Invalid {
-		_, _ = w.s.Write(invalidAngleBytes)
+		_, _ = f.s.Write(invalidAngleBytes)
+		return
+	}
+
+	if (kind == reflect.Ptr) && (!reflect.Indirect(v).IsValid()) {
+		f.formatPtr(v)
 		return
 	}
 
 	// Handle pointers specially.
-	switch kind {
+	if kind == reflect.Ptr {
-	case reflect.Ptr:
+		fmt.Printf("AAAA %s\n", reflect.Indirect(v).Type().String())
-		if !v.IsZero() {
+		switch reflect.Indirect(v).Type().String() {
-			if strings.HasPrefix(reflect.Indirect(v).Type().String(), "wrapperspb.") {
+		case "sql.NullBool":
-				w.protoWrapperType = true
+			if eva := reflect.Indirect(v).FieldByName("Valid"); eva.IsValid() && eva.Bool() {
-			} else if strings.HasPrefix(reflect.Indirect(v).Type().String(), "sql.Null") {
+				v = reflect.Indirect(v).FieldByName("Bool")
-				w.sqlWrapperType = true
+				kind = v.Kind()
-			} else if v.CanInterface() {
-				if _, ok := v.Interface().(protoMessage); ok {
-					w.protoWrapperType = true
-				}
 			}
-		}
+		case "sql.NullByte":
-		w.formatPtr(v)
+			if eva := reflect.Indirect(v).FieldByName("Valid"); eva.IsValid() && eva.Bool() {
-		return
+				v = reflect.Indirect(v).FieldByName("Byte")
-	case reflect.Struct:
+				kind = v.Kind()
-		if !v.IsZero() {
-			if strings.HasPrefix(reflect.Indirect(v).Type().String(), "sql.Null") {
-				w.sqlWrapperType = true
 			}
+		case "sql.NullFloat64":
+			if eva := reflect.Indirect(v).FieldByName("Valid"); eva.IsValid() && eva.Bool() {
+				v = reflect.Indirect(v).FieldByName("Float64")
+				kind = v.Kind()
+			}
+		case "sql.NullInt16":
+			if eva := reflect.Indirect(v).FieldByName("Valid"); eva.IsValid() && eva.Bool() {
+				v = reflect.Indirect(v).FieldByName("Int16")
+				kind = v.Kind()
+			}
+		case "sql.NullInt32":
+			if eva := reflect.Indirect(v).FieldByName("Valid"); eva.IsValid() && eva.Bool() {
+				v = reflect.Indirect(v).FieldByName("Int32")
+				kind = v.Kind()
+			}
+		case "sql.NullInt64":
+			if eva := reflect.Indirect(v).FieldByName("Valid"); eva.IsValid() && eva.Bool() {
+				v = reflect.Indirect(v).FieldByName("Int64")
+				kind = v.Kind()
+			}
+		case "sql.NullString":
+			fmt.Printf("AAAAAAAAAA")
+			if eva := reflect.Indirect(v).FieldByName("Valid"); eva.IsValid() && eva.Bool() {
+				v = reflect.Indirect(v).FieldByName("String")
+				kind = v.Kind()
+			}
+		case "sql.NullTime":
+			if eva := reflect.Indirect(v).FieldByName("Valid"); eva.IsValid() && eva.Bool() {
+				v = reflect.Indirect(v).FieldByName("Time")
+				kind = v.Kind()
+			}
+		case "wrapperspb.BoolValue", "wrapperspb.BytesValue",
+			"wrapperspb.DoubleValue", "wrapperspb.FloatValue",
+			"wrapperspb.Int32Value", "wrapperspb.Int64Value",
+			"wrapperspb.UInt32Value", "wrapperspb.UInt64Value",
+			"wrapperspb.StringValue":
+			if eva := reflect.Indirect(v).FieldByName("Value"); eva.IsValid() {
+				v = eva
+				kind = v.Kind()
+			}
+		default:
+			f.formatPtr(v)
+			return
 		}
 	}
 
 	// get type information unless already handled elsewhere.
-	if !w.ignoreNextType && w.s.Flag('#') {
+	if !f.ignoreNextType && f.s.Flag('#') {
 		if v.Type().Kind() != reflect.Map &&
 			v.Type().Kind() != reflect.String &&
 			v.Type().Kind() != reflect.Array &&
 			v.Type().Kind() != reflect.Slice {
-			_, _ = w.s.Write(openParenBytes)
+			_, _ = f.s.Write(openParenBytes)
 		}
 		if v.Kind() != reflect.String {
-			_, _ = w.s.Write([]byte(v.Type().String()))
+			_, _ = f.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 {
-			_, _ = w.s.Write(closeParenBytes)
+			_, _ = f.s.Write(closeParenBytes)
 		}
 	}
-	w.ignoreNextType = false
+	f.ignoreNextType = false
 
 	// Call Stringer/error interfaces if they exist and the handle methods
 	// flag is enabled.
-	if w.opts.Methods {
+	if !f.opts.Methods {
 		if (kind != reflect.Invalid) && (kind != reflect.Interface) {
-			if handled := handleMethods(w.opts, w.s, v); handled {
+			if handled := handleMethods(f.opts, f.s, v); handled {
 				return
 			}
 		}
@@ -308,48 +332,48 @@ func (w *Wrapper) format(v reflect.Value) {
 
 	switch kind {
 	case reflect.Invalid:
-		_, _ = w.s.Write(invalidAngleBytes)
+		_, _ = f.s.Write(invalidAngleBytes)
 	case reflect.Bool:
-		getBool(w.s, v.Bool())
+		getBool(f.s, v.Bool())
 	case reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Int:
-		getInt(w.s, v.Int(), 10)
+		getInt(f.s, v.Int(), 10)
 	case reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint:
-		getUint(w.s, v.Uint(), 10)
+		getUint(f.s, v.Uint(), 10)
 	case reflect.Float32:
-		getFloat(w.s, v.Float(), 32)
+		getFloat(f.s, v.Float(), 32)
 	case reflect.Float64:
-		getFloat(w.s, v.Float(), 64)
+		getFloat(f.s, v.Float(), 64)
 	case reflect.Complex64:
-		getComplex(w.s, v.Complex(), 32)
+		getComplex(f.s, v.Complex(), 32)
 	case reflect.Complex128:
-		getComplex(w.s, v.Complex(), 64)
+		getComplex(f.s, v.Complex(), 64)
 	case reflect.Slice:
 		if v.IsNil() {
-			_, _ = w.s.Write(nilAngleBytes)
+			_, _ = f.s.Write(nilAngleBytes)
 			break
 		}
 		fallthrough
 	case reflect.Array:
-		_, _ = w.s.Write(openBraceBytes)
+		_, _ = f.s.Write(openBraceBytes)
-		w.depth++
+		f.depth++
 		numEntries := v.Len()
 		for i := 0; i < numEntries; i++ {
 			if i > 0 {
-				_, _ = w.s.Write(commaBytes)
+				_, _ = f.s.Write(commaBytes)
-				_, _ = w.s.Write(spaceBytes)
+				_, _ = f.s.Write(spaceBytes)
 			}
-			w.ignoreNextType = true
+			f.ignoreNextType = true
-			w.format(w.unpackValue(v.Index(i)))
+			f.format(f.unpackValue(v.Index(i)))
 		}
-		w.depth--
+		f.depth--
-		_, _ = w.s.Write(closeBraceBytes)
+		_, _ = f.s.Write(closeBraceBytes)
 	case reflect.String:
-		_, _ = w.s.Write([]byte(`"` + v.String() + `"`))
+		_, _ = f.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() {
-			_, _ = w.s.Write(nilAngleBytes)
+			_, _ = f.s.Write(nilAngleBytes)
 		}
 	case reflect.Ptr:
 		// Do nothing.  We should never get here since pointers have already
@@ -357,123 +381,84 @@ func (w *Wrapper) format(v reflect.Value) {
 	case reflect.Map:
 		// nil maps should be indicated as different than empty maps
 		if v.IsNil() {
-			_, _ = w.s.Write(nilAngleBytes)
+			_, _ = f.s.Write(nilAngleBytes)
 			break
 		}
-		_, _ = w.s.Write(openMapBytes)
+		_, _ = f.s.Write(openMapBytes)
-		w.depth++
+		f.depth++
 		keys := v.MapKeys()
 		for i, key := range keys {
 			if i > 0 {
-				_, _ = w.s.Write(spaceBytes)
+				_, _ = f.s.Write(spaceBytes)
 			}
-			w.ignoreNextType = true
+			f.ignoreNextType = true
-			w.format(w.unpackValue(key))
+			f.format(f.unpackValue(key))
-			_, _ = w.s.Write(colonBytes)
+			_, _ = f.s.Write(colonBytes)
-			w.ignoreNextType = true
+			f.ignoreNextType = true
-			w.format(w.unpackValue(v.MapIndex(key)))
+			f.format(f.unpackValue(v.MapIndex(key)))
 		}
-		w.depth--
+		f.depth--
-		_, _ = w.s.Write(closeMapBytes)
+		_, _ = f.s.Write(closeMapBytes)
 	case reflect.Struct:
-
 		numFields := v.NumField()
-		numWritten := 0
+		_, _ = f.s.Write(openBraceBytes)
-		_, _ = w.s.Write(openBraceBytes)
+		f.depth++
-		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")
-			switch {
+			if ok {
-			case ok:
+				if sv == "omit" {
-				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
-				}
-				if tv, ok := w.takeMap[w.depth]; ok && !tv {
 					prevSkip = true
 					continue
 				}
+			} else if f.opts.Tagged {
+				prevSkip = true
+				continue
+			}
+			if i > 0 && !prevSkip {
+				_, _ = f.s.Write(commaBytes)
+				_, _ = f.s.Write(spaceBytes)
 			}
-
 			if prevSkip {
 				prevSkip = false
 			}
-
+			vtf := vt.Field(i)
-			if numWritten > 0 {
+			if f.s.Flag('+') || f.s.Flag('#') {
-				_, _ = w.s.Write(commaBytes)
+				_, _ = f.s.Write([]byte(vtf.Name))
-				_, _ = w.s.Write(spaceBytes)
+				_, _ = f.s.Write(colonBytes)
 			}
-
+			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)
-			}
-			w.format(w.unpackValue(v.Field(i)))
-			numWritten++
 		}
-		w.depth--
+		f.depth--
-
+		_, _ = f.s.Write(closeBraceBytes)
-		if numWritten == 0 && w.depth < 0 {
-			_, _ = w.s.Write(filteredBytes)
-		}
-		_, _ = w.s.Write(closeBraceBytes)
 	case reflect.Uintptr:
-		getHexPtr(w.s, uintptr(v.Uint()))
+		getHexPtr(f.s, uintptr(v.Uint()))
 	case reflect.UnsafePointer, reflect.Chan, reflect.Func:
-		getHexPtr(w.s, v.Pointer())
+		getHexPtr(f.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 := w.buildDefaultFormat()
+		format := f.buildDefaultFormat()
 		if v.CanInterface() {
-			_, _ = fmt.Fprintf(w.s, format, v.Interface())
+			_, _ = fmt.Fprintf(f.s, format, v.Interface())
 		} else {
-			_, _ = fmt.Fprintf(w.s, format, v.String())
+			_, _ = fmt.Fprintf(f.s, format, v.String())
 		}
 	}
 }
 
-func (w *Wrapper) Format(s fmt.State, verb rune) {
+func (f *unwrap) Format(s fmt.State, verb rune) {
-	w.s = s
+	f.s = s
 
 	// Use standard formatting for verbs that are not v.
 	if verb != 'v' {
-		format := w.constructOrigFormat(verb)
+		format := f.constructOrigFormat(verb)
-		_, _ = fmt.Fprintf(s, format, w.val)
+		_, _ = fmt.Fprintf(s, format, f.val)
 		return
 	}
 
-	if w.val == nil {
+	if f.val == nil {
 		if s.Flag('#') {
 			_, _ = s.Write(interfaceBytes)
 		}
@@ -481,11 +466,7 @@ func (w *Wrapper) Format(s fmt.State, verb rune) {
 		return
 	}
 
-	if w.opts.Tagged {
+	f.format(reflect.ValueOf(f.val))
-		w.buildTakeMap(reflect.ValueOf(w.val), 1)
-	}
-
-	w.format(reflect.ValueOf(w.val))
 }
 
 // handle special methods like error.Error() or fmt.Stringer interface
@@ -601,11 +582,11 @@ func catchPanic(w io.Writer, _ reflect.Value) {
 	}
 }
 
-func (w *Wrapper) buildDefaultFormat() (format string) {
+func (f *unwrap) buildDefaultFormat() (format string) {
 	buf := bytes.NewBuffer(percentBytes)
 
 	for _, flag := range sf {
-		if w.s.Flag(int(flag)) {
+		if f.s.Flag(int(flag)) {
 			_, _ = buf.WriteRune(flag)
 		}
 	}
@@ -616,68 +597,26 @@ func (w *Wrapper) buildDefaultFormat() (format string) {
 	return format
 }
 
-func (w *Wrapper) constructOrigFormat(verb rune) string {
+func (f *unwrap) constructOrigFormat(verb rune) (format string) {
 	buf := bytes.NewBuffer(percentBytes)
 
 	for _, flag := range sf {
-		if w.s.Flag(int(flag)) {
+		if f.s.Flag(int(flag)) {
 			_, _ = buf.WriteRune(flag)
 		}
 	}
 
-	if width, ok := w.s.Width(); ok {
+	if width, ok := f.s.Width(); ok {
 		_, _ = buf.WriteString(strconv.Itoa(width))
 	}
 
-	if precision, ok := w.s.Precision(); ok {
+	if precision, ok := f.s.Precision(); ok {
 		_, _ = buf.Write(precisionBytes)
 		_, _ = buf.WriteString(strconv.Itoa(precision))
 	}
 
 	_, _ = buf.WriteRune(verb)
 
-	return buf.String()
+	format = buf.String()
-}
+	return format
-
-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

@@ -1,6 +1,7 @@
 package unwrap
 
 import (
+	"database/sql"
 	"fmt"
 	"strings"
 	"testing"
@@ -8,6 +9,15 @@ import (
 	"go.unistack.org/micro/v3/codec"
 )
 
+func TestSql(t *testing.T) {
+	type val struct {
+		S sql.NullString
+	}
+	v := &val{S: sql.NullString{Valid: true, String: "test"}}
+	buf := fmt.Sprintf("%#v", Unwrap(v))
+	t.Logf(buf)
+}
+
 func TestUnwrap(t *testing.T) {
 	string1 := "string1"
 	string2 := "string2"
@@ -22,8 +32,9 @@ func TestUnwrap(t *testing.T) {
 	v1 := &val1{ar: []*string{&string1, &string2}, str: &string1, val: &val1{str: &string2}, mp: map[string]string{"key": "val"}}
 
 	buf := fmt.Sprintf("%#v", Unwrap(v1))
-	if strings.Compare(buf, `&unwrap.val1{mp:map[string]string{"key":"val"}, val:(*unwrap.val1){mp:map[string]string<nil>, val:(*unwrap.val1)<nil>, str:(*string)"string2", ar:[]*string<nil>}, str:(*string)"string1", ar:[]*string{<*><shown>, <*>"string2"}}`) != 0 {
+	chk := `&unwrap.val1{mp:map[string]string{"key":"val"}, val:(*unwrap.val1){mp:map[string]string<nil>, val:(*unwrap.val1)<nil>, str:(*string)"string2", ar:[]*string<nil>}, str:(*string)"string1", ar:[]*string{<*><shown>, <*>"string2"}}`
-		t.Fatalf("not proper written %s", buf)
+	if strings.Compare(buf, chk) != 0 {
+		t.Fatalf("not proper written\n%s\n%s", buf, chk)
 	}
 
 	type val2 struct {
@@ -57,11 +68,10 @@ func TestOmit(t *testing.T) {
 	type val struct {
 		Key1 string `logger:"omit"`
 		Key2 string `logger:"take"`
-		Key3 string
 	}
-	v1 := &val{Key1: "val1", Key2: "val2", Key3: "val3"}
+	v1 := &val{Key1: "val1", Key2: "val2"}
 	buf := fmt.Sprintf("%#v", Unwrap(v1))
-	if strings.Compare(buf, `&unwrap.val{Key2:"val2", Key3:"val3"}`) != 0 {
+	if strings.Compare(buf, `&unwrap.val{Key2:"val2"}`) != 0 {
 		t.Fatalf("not proper written %s", buf)
 	}
 }
@@ -78,23 +88,3 @@ 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

@@ -0,0 +1,166 @@
+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

@@ -0,0 +1,399 @@
+// 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

@@ -24,17 +24,6 @@ func FromIncomingContext(ctx context.Context) (Metadata, bool) {
 	return md.md, ok
 }
 
-// MustIncomingContext returns metadata from incoming ctx
-// returned metadata shoud not be modified or race condition happens.
-// If metadata not exists panics.
-func MustIncomingContext(ctx context.Context) Metadata {
-	md, ok := FromIncomingContext(ctx)
-	if !ok {
-		panic("missing metadata")
-	}
-	return md
-}
-
 // FromOutgoingContext returns metadata from outgoing ctx
 // returned metadata shoud not be modified or race condition happens
 func FromOutgoingContext(ctx context.Context) (Metadata, bool) {
@@ -48,19 +37,10 @@ func FromOutgoingContext(ctx context.Context) (Metadata, bool) {
 	return md.md, ok
 }
 
-// MustOutgoingContext returns metadata from outgoing ctx
-// returned metadata shoud not be modified or race condition happens.
-// If metadata not exists panics.
-func MustOutgoingContext(ctx context.Context) Metadata {
-	md, ok := FromOutgoingContext(ctx)
-	if !ok {
-		panic("missing metadata")
-	}
-	return md
-}
-
 // 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
@@ -72,22 +52,17 @@ func FromContext(ctx context.Context) (Metadata, bool) {
 	return md.md, ok
 }
 
-// MustContext returns metadata from the given context
-// returned metadata shoud not be modified or race condition happens
-func MustContext(ctx context.Context) Metadata {
-	md, ok := FromContext(ctx)
-	if !ok {
-		panic("missing metadata")
-	}
-	return md
-}
-
 // 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()
 	}
-	return context.WithValue(ctx, mdKey{}, &rawMetadata{md})
+	ctx = context.WithValue(ctx, mdKey{}, &rawMetadata{md})
+	ctx = context.WithValue(ctx, mdIncomingKey{}, &rawMetadata{})
+	ctx = context.WithValue(ctx, mdOutgoingKey{}, &rawMetadata{})
+	return ctx
 }
 
 // SetOutgoingContext modify outgoing context with given metadata
@@ -119,7 +94,11 @@ func NewIncomingContext(ctx context.Context, md Metadata) context.Context {
 	if ctx == nil {
 		ctx = context.Background()
 	}
-	return context.WithValue(ctx, mdIncomingKey{}, &rawMetadata{md})
+	ctx = context.WithValue(ctx, mdIncomingKey{}, &rawMetadata{md})
+	if v, ok := ctx.Value(mdOutgoingKey{}).(*rawMetadata); !ok || v == nil {
+		ctx = context.WithValue(ctx, mdOutgoingKey{}, &rawMetadata{})
+	}
+	return ctx
 }
 
 // NewOutgoingContext creates a new context with outcoming metadata attached
@@ -127,7 +106,11 @@ func NewOutgoingContext(ctx context.Context, md Metadata) context.Context {
 	if ctx == nil {
 		ctx = context.Background()
 	}
-	return context.WithValue(ctx, mdOutgoingKey{}, &rawMetadata{md})
+	ctx = context.WithValue(ctx, mdOutgoingKey{}, &rawMetadata{md})
+	if v, ok := ctx.Value(mdIncomingKey{}).(*rawMetadata); !ok || v == nil {
+		ctx = context.WithValue(ctx, mdIncomingKey{}, &rawMetadata{})
+	}
+	return ctx
 }
 
 // AppendOutgoingContext apends new md to context
@@ -143,7 +126,7 @@ func AppendOutgoingContext(ctx context.Context, kv ...string) context.Context {
 	for k, v := range md {
 		omd.Set(k, v)
 	}
-	return ctx
+	return NewOutgoingContext(ctx, omd)
 }
 
 // AppendIncomingContext apends new md to context
@@ -159,21 +142,5 @@ func AppendIncomingContext(ctx context.Context, kv ...string) context.Context {
 	for k, v := range md {
 		omd.Set(k, v)
 	}
-	return ctx
+	return NewIncomingContext(ctx, omd)
-}
-
-// AppendContext apends new md to context
-func AppendContext(ctx context.Context, kv ...string) context.Context {
-	md, ok := Pairs(kv...)
-	if !ok {
-		return ctx
-	}
-	omd, ok := FromContext(ctx)
-	if !ok {
-		return NewContext(ctx, md)
-	}
-	for k, v := range md {
-		omd.Set(k, v)
-	}
-	return ctx
 }

metadata/metadata.go

@@ -1,10 +1,9 @@
 // Package metadata is a way of defining message headers
-package metadata
+package metadata // import "go.unistack.org/micro/v3/metadata"
 
 import (
 	"net/textproto"
 	"sort"
-	"strings"
 )
 
 var (
@@ -20,8 +19,6 @@ 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.
@@ -67,14 +64,6 @@ func (md Metadata) Iterator() *Iterator {
 	return iter
 }
 
-func (md Metadata) MustGet(key string) string {
-	val, ok := md.Get(key)
-	if !ok {
-		panic("missing metadata key")
-	}
-	return val
-}
-
 // Get returns value from metadata by key
 func (md Metadata) Get(key string) (string, bool) {
 	// fast path
@@ -82,9 +71,6 @@ func (md Metadata) Get(key string) (string, bool) {
 	if !ok {
 		// slow path
 		val, ok = md[textproto.CanonicalMIMEHeaderKey(key)]
-		if !ok {
-			val, ok = md[strings.ToLower(key)]
-		}
 	}
 	return val, ok
 }
@@ -106,25 +92,15 @@ func (md Metadata) Del(keys ...string) {
 		delete(md, key)
 		// slow path
 		delete(md, textproto.CanonicalMIMEHeaderKey(key))
-		// very slow path
-		delete(md, strings.ToLower(key))
 	}
 }
 
 // Copy makes a copy of the metadata
-func (md Metadata) CopyTo(dst Metadata) {
+func Copy(md Metadata) Metadata {
-	for k, v := range md {
-		dst[k] = v
-	}
-}
-
-// Copy makes a copy of the metadata
-func Copy(md Metadata, exclude ...string) Metadata {
 	nmd := New(len(md))
-	for k, v := range md {
+	for key, val := range md {
-		nmd[k] = v
+		nmd.Set(key, val)
 	}
-	nmd.Del(exclude...)
 	return nmd
 }
 
@@ -146,7 +122,7 @@ func Merge(omd Metadata, mmd Metadata, overwrite bool) Metadata {
 		case ok && !overwrite:
 			continue
 		case val != "":
-			nmd[key] = val
+			nmd.Set(key, val)
 		case ok && val == "":
 			nmd.Del(key)
 		}
@@ -160,8 +136,6 @@ func Pairs(kv ...string) (Metadata, bool) {
 		return nil, false
 	}
 	md := New(len(kv) / 2)
-	for idx := 0; idx < len(kv); idx += 2 {
+	md.Set(kv...)
-		md[kv[idx]] = kv[idx+1]
-	}
 	return md, true
 }

metadata/metadata_test.go

@@ -5,37 +5,6 @@ import (
 	"testing"
 )
 
-func TestLowercase(t *testing.T) {
-	md := New(1)
-	md["x-request-id"] = "12345"
-	v, ok := md.Get("X-Request-Id")
-	if !ok || v == "" {
-		t.Fatalf("metadata invalid %#+v", md)
-	}
-}
-
-func TestMultipleUsage(t *testing.T) {
-	ctx := context.TODO()
-	md := New(0)
-	md.Set("key1_1", "val1_1", "key1_2", "val1_2", "key1_3", "val1_3")
-	ctx = NewIncomingContext(ctx, Copy(md))
-	ctx = NewOutgoingContext(ctx, Copy(md))
-	imd, _ := FromIncomingContext(ctx)
-	omd, _ := FromOutgoingContext(ctx)
-	_ = func(x context.Context) context.Context {
-		m, _ := FromIncomingContext(x)
-		m.Del("key1_2")
-		return ctx
-	}(ctx)
-	_ = func(x context.Context) context.Context {
-		m, _ := FromIncomingContext(x)
-		m.Del("key1_3")
-		return ctx
-	}(ctx)
-	_ = imd
-	_ = omd
-}
-
 func TestMetadataSetMultiple(t *testing.T) {
 	md := New(4)
 	md.Set("key1", "val1", "key2", "val2", "key3")
@@ -88,13 +57,6 @@ func TestPassing(t *testing.T) {
 
 	ctx = NewIncomingContext(ctx, md1)
 	testCtx(ctx)
-	_, ok := FromOutgoingContext(ctx)
-	if ok {
-		t.Fatalf("create outgoing context")
-	}
-
-	ctx = NewOutgoingContext(ctx, New(1))
-	testCtx(ctx)
 	md, ok := FromOutgoingContext(ctx)
 	if !ok {
 		t.Fatalf("missing metadata from outgoing context")
@@ -118,7 +80,7 @@ func TestMerge(t *testing.T) {
 	}
 }
 
-func TestIterator(_ *testing.T) {
+func TestIterator(t *testing.T) {
 	md := Metadata{
 		"1Last":   "last",
 		"2First":  "first",
@@ -228,14 +190,3 @@ 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"] != "val1" {
-		t.Fatal("Copy exclude not works")
-	}
-}

meter/context.go

@@ -15,15 +15,6 @@ func FromContext(ctx context.Context) (Meter, bool) {
 	return c, ok
 }
 
-// MustContext get meter from context
-func MustContext(ctx context.Context) Meter {
-	m, ok := FromContext(ctx)
-	if !ok {
-		panic("missing meter")
-	}
-	return m
-}
-
 // NewContext put meter in context
 func NewContext(ctx context.Context, c Meter) context.Context {
 	if ctx == nil {

meter/generate.go

@@ -0,0 +1,12 @@
+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

@@ -0,0 +1,67 @@
+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

@@ -0,0 +1,24 @@
+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

@@ -0,0 +1,32 @@
+// 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

@@ -0,0 +1,35 @@
+// 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
+package meter // import "go.unistack.org/micro/v3/meter"
 
 import (
 	"io"
@@ -16,19 +16,14 @@ var (
 	DefaultAddress = ":9090"
 	// DefaultPath the meter endpoint where the Meter data will be made available
 	DefaultPath = "/metrics"
-	// DefaultMeterStatsInterval specifies interval for meter updating
+	// DefaultMetricPrefix holds the string that prepends to all metrics
-	DefaultMeterStatsInterval = 5 * time.Second
+	DefaultMetricPrefix = "micro_"
+	// DefaultLabelPrefix holds the string that prepends to all labels
+	DefaultLabelPrefix = "micro_"
 	// DefaultSummaryQuantiles is the default spread of stats for summary
 	DefaultSummaryQuantiles = []float64{0.5, 0.9, 0.97, 0.99, 1}
 	// DefaultSummaryWindow is the default window for summary
 	DefaultSummaryWindow = 5 * time.Minute
-	// DefaultSkipEndpoints is the slice of endpoint that must not be metered
-	DefaultSkipEndpoints = []string{
-		"MeterService.Metrics",
-		"HealthService.Live",
-		"HealthService.Ready",
-		"HealthService.Version",
-	}
 )
 
 // Meter is an interface for collecting and instrumenting metrics

meter/noop.go

@@ -37,32 +37,32 @@ func (r *noopMeter) Init(opts ...Option) error {
 }
 
 // Counter implements the Meter interface
-func (r *noopMeter) Counter(_ string, labels ...string) Counter {
+func (r *noopMeter) Counter(name string, labels ...string) Counter {
 	return &noopCounter{labels: labels}
 }
 
 // FloatCounter implements the Meter interface
-func (r *noopMeter) FloatCounter(_ string, labels ...string) FloatCounter {
+func (r *noopMeter) FloatCounter(name string, labels ...string) FloatCounter {
 	return &noopFloatCounter{labels: labels}
 }
 
 // Gauge implements the Meter interface
-func (r *noopMeter) Gauge(_ string, _ func() float64, labels ...string) Gauge {
+func (r *noopMeter) Gauge(name string, f func() float64, labels ...string) Gauge {
 	return &noopGauge{labels: labels}
 }
 
 // Summary implements the Meter interface
-func (r *noopMeter) Summary(_ string, labels ...string) Summary {
+func (r *noopMeter) Summary(name string, labels ...string) Summary {
 	return &noopSummary{labels: labels}
 }
 
 // SummaryExt implements the Meter interface
-func (r *noopMeter) SummaryExt(_ string, _ time.Duration, _ []float64, labels ...string) Summary {
+func (r *noopMeter) SummaryExt(name string, window time.Duration, quantiles []float64, labels ...string) Summary {
 	return &noopSummary{labels: labels}
 }
 
 // Histogram implements the Meter interface
-func (r *noopMeter) Histogram(_ string, labels ...string) Histogram {
+func (r *noopMeter) Histogram(name string, labels ...string) Histogram {
 	return &noopHistogram{labels: labels}
 }
 
@@ -77,7 +77,7 @@ func (r *noopMeter) Set(opts ...Option) Meter {
 	return m
 }
 
-func (r *noopMeter) Write(_ io.Writer, _ ...Option) error {
+func (r *noopMeter) Write(w io.Writer, opts ...Option) error {
 	return nil
 }
 

meter/options.go

@@ -2,6 +2,8 @@ package meter
 
 import (
 	"context"
+
+	"go.unistack.org/micro/v3/logger"
 )
 
 // Option powers the configuration for metrics implementations:
@@ -9,6 +11,8 @@ type Option func(*Options)
 
 // Options for metrics implementations
 type Options struct {
+	// Logger used for logging
+	Logger logger.Logger
 	// Context holds external options
 	Context context.Context
 	// Name holds the meter name
@@ -17,6 +21,10 @@ type Options struct {
 	Address string
 	// Path holds the path for metrics
 	Path string
+	// MetricPrefix holds the prefix for all metrics
+	MetricPrefix string
+	// LabelPrefix holds the prefix for all labels
+	LabelPrefix string
 	// Labels holds the default labels
 	Labels []string
 	// WriteProcessMetrics flag to write process metrics
@@ -28,9 +36,12 @@ type Options struct {
 // NewOptions prepares a set of options:
 func NewOptions(opt ...Option) Options {
 	opts := Options{
-		Address: DefaultAddress,
+		Address:      DefaultAddress,
-		Path:    DefaultPath,
+		Path:         DefaultPath,
-		Context: context.Background(),
+		Context:      context.Background(),
+		Logger:       logger.DefaultLogger,
+		MetricPrefix: DefaultMetricPrefix,
+		LabelPrefix:  DefaultLabelPrefix,
 	}
 
 	for _, o := range opt {
@@ -40,6 +51,20 @@ func NewOptions(opt ...Option) Options {
 	return opts
 }
 
+// LabelPrefix sets the labels prefix
+func LabelPrefix(pref string) Option {
+	return func(o *Options) {
+		o.LabelPrefix = pref
+	}
+}
+
+// MetricPrefix sets the metric prefix
+func MetricPrefix(pref string) Option {
+	return func(o *Options) {
+		o.MetricPrefix = pref
+	}
+}
+
 // Context sets the metrics context
 func Context(ctx context.Context) Option {
 	return func(o *Options) {
@@ -70,7 +95,14 @@ func TimingObjectives(value map[float64]float64) Option {
 }
 */
 
-// Labels add the meter labels
+// Logger sets the logger
+func Logger(l logger.Logger) Option {
+	return func(o *Options) {
+		o.Logger = l
+	}
+}
+
+// Labels sets the meter labels
 func Labels(ls ...string) Option {
 	return func(o *Options) {
 		o.Labels = append(o.Labels, ls...)

meter/wrapper/wrapper.go

@@ -0,0 +1,347 @@
+package wrapper // import "go.unistack.org/micro/v3/meter/wrapper"
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"go.unistack.org/micro/v3/client"
+	"go.unistack.org/micro/v3/meter"
+	"go.unistack.org/micro/v3/server"
+)
+
+var (
+	// ClientRequestDurationSeconds specifies meter metric name
+	ClientRequestDurationSeconds = "client_request_duration_seconds"
+	// ClientRequestLatencyMicroseconds specifies meter metric name
+	ClientRequestLatencyMicroseconds = "client_request_latency_microseconds"
+	// ClientRequestTotal specifies meter metric name
+	ClientRequestTotal = "client_request_total"
+	// ClientRequestInflight specifies meter metric name
+	ClientRequestInflight = "client_request_inflight"
+	// ServerRequestDurationSeconds specifies meter metric name
+	ServerRequestDurationSeconds = "server_request_duration_seconds"
+	// ServerRequestLatencyMicroseconds specifies meter metric name
+	ServerRequestLatencyMicroseconds = "server_request_latency_microseconds"
+	// ServerRequestTotal specifies meter metric name
+	ServerRequestTotal = "server_request_total"
+	// ServerRequestInflight specifies meter metric name
+	ServerRequestInflight = "server_request_inflight"
+	// PublishMessageDurationSeconds specifies meter metric name
+	PublishMessageDurationSeconds = "publish_message_duration_seconds"
+	// PublishMessageLatencyMicroseconds specifies meter metric name
+	PublishMessageLatencyMicroseconds = "publish_message_latency_microseconds"
+	// PublishMessageTotal specifies meter metric name
+	PublishMessageTotal = "publish_message_total"
+	// PublishMessageInflight specifies meter metric name
+	PublishMessageInflight = "publish_message_inflight"
+	// SubscribeMessageDurationSeconds specifies meter metric name
+	SubscribeMessageDurationSeconds = "subscribe_message_duration_seconds"
+	// SubscribeMessageLatencyMicroseconds specifies meter metric name
+	SubscribeMessageLatencyMicroseconds = "subscribe_message_latency_microseconds"
+	// SubscribeMessageTotal specifies meter metric name
+	SubscribeMessageTotal = "subscribe_message_total"
+	// SubscribeMessageInflight specifies meter metric name
+	SubscribeMessageInflight = "subscribe_message_inflight"
+
+	labelSuccess  = "success"
+	labelFailure  = "failure"
+	labelStatus   = "status"
+	labelEndpoint = "endpoint"
+
+	// DefaultSkipEndpoints contains list of endpoints that not evaluted by wrapper
+	DefaultSkipEndpoints = []string{"Meter.Metrics", "Health.Live", "Health.Ready", "Health.Version"}
+)
+
+// Options struct
+type Options struct {
+	Meter         meter.Meter
+	lopts         []meter.Option
+	SkipEndpoints []string
+}
+
+// Option func signature
+type Option func(*Options)
+
+// NewOptions creates new Options struct
+func NewOptions(opts ...Option) Options {
+	options := Options{
+		Meter:         meter.DefaultMeter,
+		lopts:         make([]meter.Option, 0, 5),
+		SkipEndpoints: DefaultSkipEndpoints,
+	}
+	for _, o := range opts {
+		o(&options)
+	}
+	return options
+}
+
+// ServiceName passes service name to meter label
+func ServiceName(name string) Option {
+	return func(o *Options) {
+		o.lopts = append(o.lopts, meter.Labels("name", name))
+	}
+}
+
+// ServiceVersion passes service version to meter label
+func ServiceVersion(version string) Option {
+	return func(o *Options) {
+		o.lopts = append(o.lopts, meter.Labels("version", version))
+	}
+}
+
+// ServiceID passes service id to meter label
+func ServiceID(id string) Option {
+	return func(o *Options) {
+		o.lopts = append(o.lopts, meter.Labels("id", id))
+	}
+}
+
+// Meter passes meter
+func Meter(m meter.Meter) Option {
+	return func(o *Options) {
+		o.Meter = m
+	}
+}
+
+// SkipEndoints add endpoint to skip
+func SkipEndoints(eps ...string) Option {
+	return func(o *Options) {
+		o.SkipEndpoints = append(o.SkipEndpoints, eps...)
+	}
+}
+
+type wrapper struct {
+	client.Client
+	callFunc client.CallFunc
+	opts     Options
+}
+
+// NewClientWrapper create new client wrapper
+func NewClientWrapper(opts ...Option) client.Wrapper {
+	return func(c client.Client) client.Client {
+		handler := &wrapper{
+			opts:   NewOptions(opts...),
+			Client: c,
+		}
+		return handler
+	}
+}
+
+// NewCallWrapper create new call wrapper
+func NewCallWrapper(opts ...Option) client.CallWrapper {
+	return func(fn client.CallFunc) client.CallFunc {
+		handler := &wrapper{
+			opts:     NewOptions(opts...),
+			callFunc: fn,
+		}
+		return handler.CallFunc
+	}
+}
+
+func (w *wrapper) CallFunc(ctx context.Context, addr string, req client.Request, rsp interface{}, opts client.CallOptions) error {
+	endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Endpoint())
+	for _, ep := range w.opts.SkipEndpoints {
+		if ep == endpoint {
+			return w.callFunc(ctx, addr, req, rsp, opts)
+		}
+	}
+
+	labels := make([]string, 0, 4)
+	labels = append(labels, labelEndpoint, endpoint)
+
+	w.opts.Meter.Counter(ClientRequestInflight, labels...).Inc()
+	ts := time.Now()
+	err := w.callFunc(ctx, addr, req, rsp, opts)
+	te := time.Since(ts)
+	w.opts.Meter.Counter(ClientRequestInflight, labels...).Dec()
+
+	w.opts.Meter.Summary(ClientRequestLatencyMicroseconds, labels...).Update(te.Seconds())
+	w.opts.Meter.Histogram(ClientRequestDurationSeconds, labels...).Update(te.Seconds())
+
+	if err == nil {
+		labels = append(labels, labelStatus, labelSuccess)
+	} else {
+		labels = append(labels, labelStatus, labelFailure)
+	}
+	w.opts.Meter.Counter(ClientRequestTotal, labels...).Inc()
+
+	return err
+}
+
+func (w *wrapper) Call(ctx context.Context, req client.Request, rsp interface{}, opts ...client.CallOption) error {
+	endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Endpoint())
+	for _, ep := range w.opts.SkipEndpoints {
+		if ep == endpoint {
+			return w.Client.Call(ctx, req, rsp, opts...)
+		}
+	}
+
+	labels := make([]string, 0, 4)
+	labels = append(labels, labelEndpoint, endpoint)
+
+	w.opts.Meter.Counter(ClientRequestInflight, labels...).Inc()
+	ts := time.Now()
+	err := w.Client.Call(ctx, req, rsp, opts...)
+	te := time.Since(ts)
+	w.opts.Meter.Counter(ClientRequestInflight, labels...).Dec()
+
+	w.opts.Meter.Summary(ClientRequestLatencyMicroseconds, labels...).Update(te.Seconds())
+	w.opts.Meter.Histogram(ClientRequestDurationSeconds, labels...).Update(te.Seconds())
+
+	if err == nil {
+		labels = append(labels, labelStatus, labelSuccess)
+	} else {
+		labels = append(labels, labelStatus, labelFailure)
+	}
+	w.opts.Meter.Counter(ClientRequestTotal, labels...).Inc()
+
+	return err
+}
+
+func (w *wrapper) Stream(ctx context.Context, req client.Request, opts ...client.CallOption) (client.Stream, error) {
+	endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Endpoint())
+	for _, ep := range w.opts.SkipEndpoints {
+		if ep == endpoint {
+			return w.Client.Stream(ctx, req, opts...)
+		}
+	}
+
+	labels := make([]string, 0, 4)
+	labels = append(labels, labelEndpoint, endpoint)
+
+	w.opts.Meter.Counter(ClientRequestInflight, labels...).Inc()
+	ts := time.Now()
+	stream, err := w.Client.Stream(ctx, req, opts...)
+	te := time.Since(ts)
+	w.opts.Meter.Counter(ClientRequestInflight, labels...).Dec()
+
+	w.opts.Meter.Summary(ClientRequestLatencyMicroseconds, labels...).Update(te.Seconds())
+	w.opts.Meter.Histogram(ClientRequestDurationSeconds, labels...).Update(te.Seconds())
+
+	if err == nil {
+		labels = append(labels, labelStatus, labelSuccess)
+	} else {
+		labels = append(labels, labelStatus, labelFailure)
+	}
+	w.opts.Meter.Counter(ClientRequestTotal, labels...).Inc()
+
+	return stream, err
+}
+
+func (w *wrapper) Publish(ctx context.Context, p client.Message, opts ...client.PublishOption) error {
+	endpoint := p.Topic()
+
+	labels := make([]string, 0, 4)
+	labels = append(labels, labelEndpoint, endpoint)
+
+	w.opts.Meter.Counter(PublishMessageInflight, labels...).Inc()
+	ts := time.Now()
+	err := w.Client.Publish(ctx, p, opts...)
+	te := time.Since(ts)
+	w.opts.Meter.Counter(PublishMessageInflight, labels...).Dec()
+
+	w.opts.Meter.Summary(PublishMessageLatencyMicroseconds, labels...).Update(te.Seconds())
+	w.opts.Meter.Histogram(PublishMessageDurationSeconds, labels...).Update(te.Seconds())
+
+	if err == nil {
+		labels = append(labels, labelStatus, labelSuccess)
+	} else {
+		labels = append(labels, labelStatus, labelFailure)
+	}
+	w.opts.Meter.Counter(PublishMessageTotal, labels...).Inc()
+
+	return err
+}
+
+// NewHandlerWrapper create new server handler wrapper
+// deprecated
+func NewHandlerWrapper(opts ...Option) server.HandlerWrapper {
+	handler := &wrapper{
+		opts: NewOptions(opts...),
+	}
+	return handler.HandlerFunc
+}
+
+// NewServerHandlerWrapper create new server handler wrapper
+func NewServerHandlerWrapper(opts ...Option) server.HandlerWrapper {
+	handler := &wrapper{
+		opts: NewOptions(opts...),
+	}
+	return handler.HandlerFunc
+}
+
+func (w *wrapper) HandlerFunc(fn server.HandlerFunc) server.HandlerFunc {
+	return func(ctx context.Context, req server.Request, rsp interface{}) error {
+		endpoint := req.Service() + "." + req.Endpoint()
+		for _, ep := range w.opts.SkipEndpoints {
+			if ep == endpoint {
+				return fn(ctx, req, rsp)
+			}
+		}
+
+		labels := make([]string, 0, 4)
+		labels = append(labels, labelEndpoint, endpoint)
+
+		w.opts.Meter.Counter(ServerRequestInflight, labels...).Inc()
+		ts := time.Now()
+		err := fn(ctx, req, rsp)
+		te := time.Since(ts)
+		w.opts.Meter.Counter(ServerRequestInflight, labels...).Dec()
+
+		w.opts.Meter.Summary(ServerRequestLatencyMicroseconds, labels...).Update(te.Seconds())
+		w.opts.Meter.Histogram(ServerRequestDurationSeconds, labels...).Update(te.Seconds())
+
+		if err == nil {
+			labels = append(labels, labelStatus, labelSuccess)
+		} else {
+			labels = append(labels, labelStatus, labelFailure)
+		}
+		w.opts.Meter.Counter(ServerRequestTotal, labels...).Inc()
+
+		return err
+	}
+}
+
+// NewSubscriberWrapper create server subscribe wrapper
+// deprecated
+func NewSubscriberWrapper(opts ...Option) server.SubscriberWrapper {
+	handler := &wrapper{
+		opts: NewOptions(opts...),
+	}
+	return handler.SubscriberFunc
+}
+
+func NewServerSubscriberWrapper(opts ...Option) server.SubscriberWrapper {
+	handler := &wrapper{
+		opts: NewOptions(opts...),
+	}
+	return handler.SubscriberFunc
+}
+
+func (w *wrapper) SubscriberFunc(fn server.SubscriberFunc) server.SubscriberFunc {
+	return func(ctx context.Context, msg server.Message) error {
+		endpoint := msg.Topic()
+
+		labels := make([]string, 0, 4)
+		labels = append(labels, labelEndpoint, endpoint)
+
+		w.opts.Meter.Counter(SubscribeMessageInflight, labels...).Inc()
+		ts := time.Now()
+		err := fn(ctx, msg)
+		te := time.Since(ts)
+		w.opts.Meter.Counter(SubscribeMessageInflight, labels...).Dec()
+
+		w.opts.Meter.Summary(SubscribeMessageLatencyMicroseconds, labels...).Update(te.Seconds())
+		w.opts.Meter.Histogram(SubscribeMessageDurationSeconds, labels...).Update(te.Seconds())
+
+		if err == nil {
+			labels = append(labels, labelStatus, labelSuccess)
+		} else {
+			labels = append(labels, labelStatus, labelFailure)
+		}
+		w.opts.Meter.Counter(SubscribeMessageTotal, labels...).Inc()
+
+		return err
+	}
+}

micro.go

@@ -1,98 +0,0 @@
-package micro
-
-import (
-	"reflect"
-
-	"go.unistack.org/micro/v3/broker"
-	"go.unistack.org/micro/v3/client"
-	"go.unistack.org/micro/v3/codec"
-	"go.unistack.org/micro/v3/flow"
-	"go.unistack.org/micro/v3/fsm"
-	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v3/meter"
-	"go.unistack.org/micro/v3/register"
-	"go.unistack.org/micro/v3/resolver"
-	"go.unistack.org/micro/v3/router"
-	"go.unistack.org/micro/v3/selector"
-	"go.unistack.org/micro/v3/server"
-	"go.unistack.org/micro/v3/store"
-	"go.unistack.org/micro/v3/sync"
-	"go.unistack.org/micro/v3/tracer"
-)
-
-func As(b any, target any) bool {
-	if b == nil {
-		return false
-	}
-	if target == nil {
-		return false
-	}
-	val := reflect.ValueOf(target)
-	typ := val.Type()
-	if typ.Kind() != reflect.Ptr || val.IsNil() {
-		return false
-	}
-	targetType := typ.Elem()
-	if targetType.Kind() != reflect.Interface {
-		switch {
-		case targetType.Implements(brokerType):
-			break
-		case targetType.Implements(loggerType):
-			break
-		case targetType.Implements(clientType):
-			break
-		case targetType.Implements(serverType):
-			break
-		case targetType.Implements(codecType):
-			break
-		case targetType.Implements(flowType):
-			break
-		case targetType.Implements(fsmType):
-			break
-		case targetType.Implements(meterType):
-			break
-		case targetType.Implements(registerType):
-			break
-		case targetType.Implements(resolverType):
-			break
-		case targetType.Implements(selectorType):
-			break
-		case targetType.Implements(storeType):
-			break
-		case targetType.Implements(syncType):
-			break
-		case targetType.Implements(serviceType):
-			break
-		case targetType.Implements(routerType):
-			break
-		case targetType.Implements(tracerType):
-			break
-		default:
-			return false
-		}
-	}
-	if reflect.TypeOf(b).AssignableTo(targetType) {
-		val.Elem().Set(reflect.ValueOf(b))
-		return true
-	}
-	return false
-}
-
-var (
-	brokerType   = reflect.TypeOf((*broker.Broker)(nil)).Elem()
-	loggerType   = reflect.TypeOf((*logger.Logger)(nil)).Elem()
-	clientType   = reflect.TypeOf((*client.Client)(nil)).Elem()
-	serverType   = reflect.TypeOf((*server.Server)(nil)).Elem()
-	codecType    = reflect.TypeOf((*codec.Codec)(nil)).Elem()
-	flowType     = reflect.TypeOf((*flow.Flow)(nil)).Elem()
-	fsmType      = reflect.TypeOf((*fsm.FSM)(nil)).Elem()
-	meterType    = reflect.TypeOf((*meter.Meter)(nil)).Elem()
-	registerType = reflect.TypeOf((*register.Register)(nil)).Elem()
-	resolverType = reflect.TypeOf((*resolver.Resolver)(nil)).Elem()
-	routerType   = reflect.TypeOf((*router.Router)(nil)).Elem()
-	selectorType = reflect.TypeOf((*selector.Selector)(nil)).Elem()
-	storeType    = reflect.TypeOf((*store.Store)(nil)).Elem()
-	syncType     = reflect.TypeOf((*sync.Sync)(nil)).Elem()
-	tracerType   = reflect.TypeOf((*tracer.Tracer)(nil)).Elem()
-	serviceType  = reflect.TypeOf((*Service)(nil)).Elem()
-)

micro_test.go

@@ -1,122 +0,0 @@
-package micro
-
-import (
-	"context"
-	"fmt"
-	"reflect"
-	"testing"
-
-	"go.unistack.org/micro/v3/broker"
-	"go.unistack.org/micro/v3/fsm"
-)
-
-func TestAs(t *testing.T) {
-	var b *bro
-	broTarget := &bro{name: "kafka"}
-	fsmTarget := &fsmT{name: "fsm"}
-
-	testCases := []struct {
-		b      any
-		target any
-		want   any
-
-		match bool
-	}{
-		{
-			b:      broTarget,
-			target: &b,
-			match:  true,
-			want:   broTarget,
-		},
-		{
-			b:      nil,
-			target: &b,
-			match:  false,
-			want:   nil,
-		},
-		{
-			b:      fsmTarget,
-			target: &b,
-			match:  false,
-			want:   nil,
-		},
-	}
-	for i, tc := range testCases {
-		name := fmt.Sprintf("%d:As(Errorf(..., %v), %v)", i, tc.b, tc.target)
-		// Clear the target pointer, in case it was set in a previous test.
-		rtarget := reflect.ValueOf(tc.target)
-		rtarget.Elem().Set(reflect.Zero(reflect.TypeOf(tc.target).Elem()))
-		t.Run(name, func(t *testing.T) {
-			match := As(tc.b, tc.target)
-			if match != tc.match {
-				t.Fatalf("match: got %v; want %v", match, tc.match)
-			}
-			if !match {
-				return
-			}
-			if got := rtarget.Elem().Interface(); got != tc.want {
-				t.Fatalf("got %#v, want %#v", got, tc.want)
-			}
-		})
-	}
-}
-
-type bro struct {
-	name string
-}
-
-func (p *bro) Name() string { return p.name }
-
-func (p *bro) Live() bool { return true }
-
-func (p *bro) Ready() bool { return true }
-
-func (p *bro) Health() bool { return true }
-
-func (p *bro) Init(_ ...broker.Option) error { return nil }
-
-// Options returns broker options
-func (p *bro) Options() broker.Options { return broker.Options{} }
-
-// Address return configured address
-func (p *bro) Address() string { return "" }
-
-// Connect connects to broker
-func (p *bro) Connect(_ context.Context) error { return nil }
-
-// Disconnect disconnect from broker
-func (p *bro) Disconnect(_ context.Context) error { return nil }
-
-// Publish message, msg can be single broker.Message or []broker.Message
-func (p *bro) Publish(_ context.Context, _ string, _ *broker.Message, _ ...broker.PublishOption) error {
-	return nil
-}
-
-// BatchPublish messages to broker with multiple topics
-func (p *bro) BatchPublish(_ context.Context, _ []*broker.Message, _ ...broker.PublishOption) error {
-	return nil
-}
-
-// BatchSubscribe subscribes to topic messages via handler
-func (p *bro) BatchSubscribe(_ context.Context, _ string, _ broker.BatchHandler, _ ...broker.SubscribeOption) (broker.Subscriber, error) {
-	return nil, nil
-}
-
-// Subscribe subscribes to topic message via handler
-func (p *bro) Subscribe(_ context.Context, _ string, _ broker.Handler, _ ...broker.SubscribeOption) (broker.Subscriber, error) {
-	return nil, nil
-}
-
-// String type of broker
-func (p *bro) String() string { return p.name }
-
-type fsmT struct {
-	name string
-}
-
-func (f *fsmT) Start(_ context.Context, _ interface{}, _ ...Option) (interface{}, error) {
-	return nil, nil
-}
-func (f *fsmT) Current() string                 { return f.name }
-func (f *fsmT) Reset()                          {}
-func (f *fsmT) State(_ string, _ fsm.StateFunc) {}

mtls/mtls.go

@@ -1,4 +1,4 @@
-package mtls
+package mtls // import "go.unistack.org/micro/v3/mtls"
 
 import (
 	"bytes"

mtls/options.go

@@ -8,20 +8,19 @@ import (
 
 // CertificateOptions holds options for x509.CreateCertificate
 type CertificateOptions struct {
+	Organization          []string
+	OrganizationalUnit    []string
+	CommonName            string
+	OCSPServer            []string
+	IssuingCertificateURL []string
 	SerialNumber          *big.Int
 	NotAfter              time.Time
 	NotBefore             time.Time
-	CommonName            string
+	SignatureAlgorithm    x509.SignatureAlgorithm
-	Organization          []string
+	PublicKeyAlgorithm    x509.PublicKeyAlgorithm
-	OrganizationalUnit    []string
-	OCSPServer            []string
-	IssuingCertificateURL []string
 	ExtKeyUsage           []x509.ExtKeyUsage
-
+	KeyUsage              x509.KeyUsage
-	SignatureAlgorithm x509.SignatureAlgorithm
+	IsCA                  bool
-	PublicKeyAlgorithm x509.PublicKeyAlgorithm
-	KeyUsage           x509.KeyUsage
-	IsCA               bool
 }
 
 // CertificateOrganizationalUnit set OrganizationalUnit in certificate subject

network/network.go

@@ -1,5 +1,5 @@
 // Package network is for creating internetworks
-package network
+package network // import "go.unistack.org/micro/v3/network"
 
 import (
 	"go.unistack.org/micro/v3/client"

network/options.go

@@ -119,7 +119,7 @@ func Tracer(t tracer.Tracer) Option {
 // NewOptions returns network default options
 func NewOptions(opts ...Option) Options {
 	options := Options{
-		ID:      id.MustNew(),
+		ID:      id.Must(),
 		Name:    "go.micro",
 		Address: ":0",
 		Logger:  logger.DefaultLogger,

network/transport/transport.go

@@ -1,5 +1,5 @@
 // Package transport is an interface for synchronous connection based communication
-package transport
+package transport // import "go.unistack.org/micro/v3/network/transport"
 
 import (
 	"context"
@@ -10,7 +10,7 @@ import (
 
 var (
 	// DefaultTransport is the global default transport
-	DefaultTransport = NewTransport()
+	DefaultTransport Transport = NewTransport()
 	// DefaultDialTimeout the default dial timeout
 	DefaultDialTimeout = time.Second * 5
 )

network/tunnel/broker/broker.go

@@ -1,5 +1,5 @@
 // Package broker is a tunnel broker
-package broker
+package broker // import "go.unistack.org/micro/v3/network/tunnel/broker"
 
 import (
 	"context"
@@ -45,18 +45,6 @@ type (
 	tunnelAddr struct{}
 )
 
-func (t *tunBroker) Live() bool {
-	return true
-}
-
-func (t *tunBroker) Ready() bool {
-	return true
-}
-
-func (t *tunBroker) Health() bool {
-	return true
-}
-
 func (t *tunBroker) Init(opts ...broker.Option) error {
 	for _, o := range opts {
 		o(&t.opts)
@@ -84,7 +72,7 @@ func (t *tunBroker) Disconnect(ctx context.Context) error {
 	return t.tunnel.Close(ctx)
 }
 
-func (t *tunBroker) BatchPublish(ctx context.Context, msgs []*broker.Message, _ ...broker.PublishOption) error {
+func (t *tunBroker) BatchPublish(ctx context.Context, msgs []*broker.Message, opts ...broker.PublishOption) error {
 	// TODO: this is probably inefficient, we might want to just maintain an open connection
 	// it may be easier to add broadcast to the tunnel
 	topicMap := make(map[string]tunnel.Session)
@@ -114,7 +102,7 @@ func (t *tunBroker) BatchPublish(ctx context.Context, msgs []*broker.Message, _
 	return nil
 }
 
-func (t *tunBroker) Publish(ctx context.Context, topic string, m *broker.Message, _ ...broker.PublishOption) error {
+func (t *tunBroker) Publish(ctx context.Context, topic string, m *broker.Message, opts ...broker.PublishOption) error {
 	// TODO: this is probably inefficient, we might want to just maintain an open connection
 	// it may be easier to add broadcast to the tunnel
 	c, err := t.tunnel.Dial(ctx, topic, tunnel.DialMode(tunnel.Multicast))
@@ -189,12 +177,12 @@ func (t *tunBatchSubscriber) run() {
 		// receive message
 		m := new(transport.Message)
 		if err := c.Recv(m); err != nil {
-			if logger.DefaultLogger.V(logger.ErrorLevel) {
+			if logger.V(logger.ErrorLevel) {
-				logger.DefaultLogger.Error(t.opts.Context, err.Error(), err)
+				logger.Error(t.opts.Context, err.Error())
 			}
 			if err = c.Close(); err != nil {
-				if logger.DefaultLogger.V(logger.ErrorLevel) {
+				if logger.V(logger.ErrorLevel) {
-					logger.DefaultLogger.Error(t.opts.Context, err.Error(), err)
+					logger.Error(t.opts.Context, err.Error())
 				}
 			}
 			continue
@@ -234,12 +222,12 @@ func (t *tunSubscriber) run() {
 		// receive message
 		m := new(transport.Message)
 		if err := c.Recv(m); err != nil {
-			if logger.DefaultLogger.V(logger.ErrorLevel) {
+			if logger.V(logger.ErrorLevel) {
-				logger.DefaultLogger.Error(t.opts.Context, err.Error(), err)
+				logger.Error(t.opts.Context, err.Error())
 			}
 			if err = c.Close(); err != nil {
-				if logger.DefaultLogger.V(logger.ErrorLevel) {
+				if logger.V(logger.ErrorLevel) {
-					logger.DefaultLogger.Error(t.opts.Context, err.Error(), err)
+					logger.Error(t.opts.Context, err.Error())
 				}
 			}
 			continue
@@ -317,10 +305,6 @@ func (t *tunEvent) SetError(err error) {
 	t.err = err
 }
 
-func (t *tunEvent) Context() context.Context {
-	return context.TODO()
-}
-
 // NewBroker returns new tunnel broker
 func NewBroker(opts ...broker.Option) (broker.Broker, error) {
 	options := broker.NewOptions(opts...)

network/tunnel/options.go

@@ -164,7 +164,7 @@ func DialWait(b bool) DialOption {
 // NewOptions returns router default options with filled values
 func NewOptions(opts ...Option) Options {
 	options := Options{
-		ID:      id.MustNew(),
+		ID:      id.Must(),
 		Address: DefaultAddress,
 		Token:   DefaultToken,
 		Logger:  logger.DefaultLogger,

network/tunnel/transport/transport.go

@@ -1,5 +1,5 @@
 // Package transport provides a tunnel transport
-package transport
+package transport // import "go.unistack.org/micro/v3/network/tunnel/transport"
 
 import (
 	"context"