move to v4

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

.gitea/ISSUE_TEMPLATE/bug_report.md

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

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

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

.gitea/ISSUE_TEMPLATE/question.md

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

.gitea/autoapprove.yml

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

.gitea/workflows/lint.yml

@@ -0,0 +1,24 @@
+name: lint
+on:
+  pull_request:
+    branches:
+    - master
+    - v3
+jobs:
+  lint:
+    name: lint
+    runs-on: ubuntu-latest
+    steps:
+    - name: setup-go
+      uses: https://gitea.com/actions/setup-go@v3
+      with:
+        go-version: 1.18
+    - name: checkout
+      uses: https://gitea.com/actions/checkout@v3
+    - name: deps
+      run: go get -v -d ./...
+    - name: lint
+      uses: https://github.com/golangci/golangci-lint-action@v3.4.0
+      continue-on-error: true
+      with:
+        version: v1.52

.gitea/workflows/pr.yml

@@ -0,0 +1,23 @@
+name: pr
+on:
+  pull_request:
+    branches:
+    - master
+    - v3
+jobs:
+  test:
+    name: test
+    runs-on: ubuntu-latest
+    steps:
+    - name: checkout
+      uses: https://gitea.com/actions/checkout@v3
+    - name: setup-go
+      uses: https://gitea.com/actions/setup-go@v3
+      with:
+        go-version: 1.18
+    - name: deps
+      run: go get -v -t -d ./...
+    - name: test
+      env:
+        INTEGRATION_TESTS: yes
+      run: go test -mod readonly -v ./...

.github.old/PULL_REQUEST_TEMPLATE.md

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

.github.old/workflows/pr.yml

@@ -37,11 +37,4 @@ jobs:
         uses: golangci/golangci-lint-action@v3.4.0
         continue-on-error: true
         with:
-          # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.
-          version: v1.30
-          # Optional: working directory, useful for monorepos
-          # working-directory: somedir
-          # Optional: golangci-lint command line arguments.
-          # args: --issues-exit-code=0
-          # Optional: show only new issues if it's a pull request. The default value is `false`.
-          # only-new-issues: true
+          version: v1.30

README.md

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

broker/broker.go

@@ -1,11 +1,12 @@
 // Package broker is an interface used for asynchronous messaging
-package broker // import "go.unistack.org/micro/v3/broker"
+package broker // import "go.unistack.org/micro/v4/broker"
 
 import (
 	"context"
 	"errors"
 
-	"go.unistack.org/micro/v3/metadata"
+	"go.unistack.org/micro/v4/codec"
+	"go.unistack.org/micro/v4/metadata"
 )
 
 // DefaultBroker default memory broker
@@ -85,33 +86,12 @@ 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 RawMessage
+	Body codec.RawMessage
 }
 
 // NewMessage create broker message with topic filled

broker/memory.go

@@ -4,12 +4,12 @@ import (
 	"context"
 	"sync"
 
-	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v3/metadata"
-	maddr "go.unistack.org/micro/v3/util/addr"
-	"go.unistack.org/micro/v3/util/id"
-	mnet "go.unistack.org/micro/v3/util/net"
-	"go.unistack.org/micro/v3/util/rand"
+	"go.unistack.org/micro/v4/logger"
+	"go.unistack.org/micro/v4/metadata"
+	maddr "go.unistack.org/micro/v4/util/addr"
+	"go.unistack.org/micro/v4/util/id"
+	mnet "go.unistack.org/micro/v4/util/net"
+	"go.unistack.org/micro/v4/util/rand"
 )
 
 type memoryBroker struct {

broker/memory_test.go

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

broker/options.go

@@ -5,11 +5,11 @@ import (
 	"crypto/tls"
 	"time"
 
-	"go.unistack.org/micro/v3/codec"
-	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v3/meter"
-	"go.unistack.org/micro/v3/register"
-	"go.unistack.org/micro/v3/tracer"
+	"go.unistack.org/micro/v4/codec"
+	"go.unistack.org/micro/v4/logger"
+	"go.unistack.org/micro/v4/meter"
+	"go.unistack.org/micro/v4/register"
+	"go.unistack.org/micro/v4/tracer"
 )
 
 // Options struct

client/backoff.go

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

client/client.go

@@ -1,12 +1,12 @@
 // Package client is an interface for an RPC client
-package client // import "go.unistack.org/micro/v3/client"
+package client // import "go.unistack.org/micro/v4/client"
 
 import (
 	"context"
 	"time"
 
-	"go.unistack.org/micro/v3/codec"
-	"go.unistack.org/micro/v3/metadata"
+	"go.unistack.org/micro/v4/codec"
+	"go.unistack.org/micro/v4/metadata"
 )
 
 var (

client/lookup.go

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

client/noop.go

@@ -5,11 +5,11 @@ import (
 	"fmt"
 	"time"
 
-	"go.unistack.org/micro/v3/broker"
-	"go.unistack.org/micro/v3/codec"
-	"go.unistack.org/micro/v3/errors"
-	"go.unistack.org/micro/v3/metadata"
-	"go.unistack.org/micro/v3/selector"
+	"go.unistack.org/micro/v4/broker"
+	"go.unistack.org/micro/v4/codec"
+	"go.unistack.org/micro/v4/errors"
+	"go.unistack.org/micro/v4/metadata"
+	"go.unistack.org/micro/v4/selector"
 )
 
 // DefaultCodecs will be used to encode/decode data

client/options.go

@@ -6,17 +6,17 @@ import (
 	"net"
 	"time"
 
-	"go.unistack.org/micro/v3/broker"
-	"go.unistack.org/micro/v3/codec"
-	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v3/metadata"
-	"go.unistack.org/micro/v3/meter"
-	"go.unistack.org/micro/v3/network/transport"
-	"go.unistack.org/micro/v3/register"
-	"go.unistack.org/micro/v3/router"
-	"go.unistack.org/micro/v3/selector"
-	"go.unistack.org/micro/v3/selector/random"
-	"go.unistack.org/micro/v3/tracer"
+	"go.unistack.org/micro/v4/broker"
+	"go.unistack.org/micro/v4/codec"
+	"go.unistack.org/micro/v4/logger"
+	"go.unistack.org/micro/v4/metadata"
+	"go.unistack.org/micro/v4/meter"
+	"go.unistack.org/micro/v4/network/transport"
+	"go.unistack.org/micro/v4/register"
+	"go.unistack.org/micro/v4/router"
+	"go.unistack.org/micro/v4/selector"
+	"go.unistack.org/micro/v4/selector/random"
+	"go.unistack.org/micro/v4/tracer"
 )
 
 // Options holds client options

client/retry.go

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

client/retry_test.go

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

client/test_request.go

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

codec/codec.go

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

codec/frame.proto

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

codec/options.go

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

config/config.go

@@ -1,5 +1,5 @@
 // Package config is an interface for dynamic configuration.
-package config // import "go.unistack.org/micro/v3/config"
+package config // import "go.unistack.org/micro/v4/config"
 
 import (
 	"context"
@@ -124,33 +124,12 @@ func Validate(ctx context.Context, cfg interface{}) error {
 }
 
 var (
-	// DefaultAfterLoad default func that runs after config load
-	DefaultAfterLoad = func(ctx context.Context, c Config) error {
-		for _, fn := range c.Options().AfterLoad {
-			if err := fn(ctx, c); err != nil {
-				c.Options().Logger.Errorf(ctx, "%s AfterLoad err: %v", c.String(), err)
-				if !c.Options().AllowFail {
-					return err
-				}
-			}
-		}
-		return nil
-	}
-	// DefaultAfterSave default func that runs after config save
-	DefaultAfterSave = func(ctx context.Context, c Config) error {
-		for _, fn := range c.Options().AfterSave {
-			if err := fn(ctx, c); err != nil {
-				c.Options().Logger.Errorf(ctx, "%s AfterSave err: %v", c.String(), err)
-				if !c.Options().AllowFail {
-					return err
-				}
-			}
-		}
-		return nil
-	}
-	// DefaultBeforeLoad default func that runs before config load
+	// DefaultBeforeLoad default func that runs before config Load
 	DefaultBeforeLoad = func(ctx context.Context, c Config) error {
 		for _, fn := range c.Options().BeforeLoad {
+			if fn == nil {
+				return nil
+			}
 			if err := fn(ctx, c); err != nil {
 				c.Options().Logger.Errorf(ctx, "%s BeforeLoad err: %v", c.String(), err)
 				if !c.Options().AllowFail {
@@ -160,9 +139,27 @@ var (
 		}
 		return nil
 	}
-	// DefaultBeforeSave default func that runs befora config save
+	// DefaultAfterLoad default func that runs after config Load
+	DefaultAfterLoad = func(ctx context.Context, c Config) error {
+		for _, fn := range c.Options().AfterLoad {
+			if fn == nil {
+				return nil
+			}
+			if err := fn(ctx, c); err != nil {
+				c.Options().Logger.Errorf(ctx, "%s AfterLoad err: %v", c.String(), err)
+				if !c.Options().AllowFail {
+					return err
+				}
+			}
+		}
+		return nil
+	}
+	// DefaultBeforeSave default func that runs befora config Save
 	DefaultBeforeSave = func(ctx context.Context, c Config) error {
 		for _, fn := range c.Options().BeforeSave {
+			if fn == nil {
+				return nil
+			}
 			if err := fn(ctx, c); err != nil {
 				c.Options().Logger.Errorf(ctx, "%s BeforeSave err: %v", c.String(), err)
 				if !c.Options().AllowFail {
@@ -172,4 +169,49 @@ var (
 		}
 		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.Errorf(ctx, "%s AfterSave err: %v", c.String(), err)
+				if !c.Options().AllowFail {
+					return err
+				}
+			}
+		}
+		return nil
+	}
+	// DefaultBeforeInit default func that runs befora config Init
+	DefaultBeforeInit = func(ctx context.Context, c Config) error {
+		for _, fn := range c.Options().BeforeInit {
+			if fn == nil {
+				return nil
+			}
+			if err := fn(ctx, c); err != nil {
+				c.Options().Logger.Errorf(ctx, "%s BeforeInit err: %v", c.String(), err)
+				if !c.Options().AllowFail {
+					return err
+				}
+			}
+		}
+		return nil
+	}
+	// DefaultAfterInit default func that runs after config Init
+	DefaultAfterInit = func(ctx context.Context, c Config) error {
+		for _, fn := range c.Options().AfterSave {
+			if fn == nil {
+				return nil
+			}
+			if err := fn(ctx, c); err != nil {
+				c.Options().Logger.Errorf(ctx, "%s AfterInit err: %v", c.String(), err)
+				if !c.Options().AllowFail {
+					return err
+				}
+			}
+		}
+		return nil
+	}
 )

config/default.go

@@ -8,8 +8,8 @@ import (
 	"time"
 
 	"github.com/imdario/mergo"
-	rutil "go.unistack.org/micro/v3/util/reflect"
-	mtime "go.unistack.org/micro/v3/util/time"
+	rutil "go.unistack.org/micro/v4/util/reflect"
+	mtime "go.unistack.org/micro/v4/util/time"
 )
 
 type defaultConfig struct {
@@ -24,11 +24,20 @@ 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
+	}
+
+	if err := DefaultAfterInit(c.opts.Context, c); err != nil && !c.opts.AllowFail {
+		return err
+	}
+
 	return nil
 }
 
 func (c *defaultConfig) Load(ctx context.Context, opts ...LoadOption) error {
-	if err := DefaultBeforeLoad(ctx, c); err != nil {
+	if err := DefaultBeforeLoad(ctx, c); err != nil && !c.opts.AllowFail {
 		return err
 	}
 
@@ -51,21 +60,20 @@ func (c *defaultConfig) Load(ctx context.Context, opts ...LoadOption) error {
 		if !c.opts.AllowFail {
 			return err
 		}
-		return DefaultAfterLoad(ctx, c)
+		if err = DefaultAfterLoad(ctx, c); err != nil && !c.opts.AllowFail {
+			return err
+		}
 	}
 
 	if err = fillValues(reflect.ValueOf(src), c.opts.StructTag); err == nil {
 		err = mergo.Merge(dst, src, mopts...)
 	}
 
-	if err != nil {
-		c.opts.Logger.Errorf(ctx, "default load error: %v", err)
-		if !c.opts.AllowFail {
-			return err
-		}
+	if err != nil && !c.opts.AllowFail {
+		return err
 	}
 
-	if err := DefaultAfterLoad(ctx, c); err != nil {
+	if err := DefaultAfterLoad(ctx, c); err != nil && !c.opts.AllowFail {
 		return err
 	}
 
@@ -161,7 +169,7 @@ func fillValue(value reflect.Value, val string) error {
 				return err
 			}
 			value.Set(reflect.ValueOf(v))
-		case value.Type().String() == "time.Duration" && value.Type().PkgPath() == "go.unistack.org/micro/v3/util/time":
+		case value.Type().String() == "time.Duration" && value.Type().PkgPath() == "go.unistack.org/micro/v4/util/time":
 			v, err := mtime.ParseDuration(val)
 			if err != nil {
 				return err

config/default_test.go

@@ -6,8 +6,8 @@ import (
 	"testing"
 	"time"
 
-	"go.unistack.org/micro/v3/config"
-	mtime "go.unistack.org/micro/v3/util/time"
+	"go.unistack.org/micro/v4/config"
+	mtime "go.unistack.org/micro/v4/util/time"
 )
 
 type cfg struct {

config/options.go

@@ -4,10 +4,10 @@ import (
 	"context"
 	"time"
 
-	"go.unistack.org/micro/v3/codec"
-	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v3/meter"
-	"go.unistack.org/micro/v3/tracer"
+	"go.unistack.org/micro/v4/codec"
+	"go.unistack.org/micro/v4/logger"
+	"go.unistack.org/micro/v4/meter"
+	"go.unistack.org/micro/v4/tracer"
 )
 
 // Options hold the config options
@@ -28,14 +28,18 @@ type Options struct {
 	Name string
 	// StructTag name
 	StructTag string
-	// BeforeSave contains slice of funcs that runs before save
+	// BeforeSave contains slice of funcs that runs before Save
 	BeforeSave []func(context.Context, Config) error
-	// AfterLoad contains slice of funcs that runs after load
-	AfterLoad []func(context.Context, Config) error
-	// BeforeLoad contains slice of funcs that runs before load
-	BeforeLoad []func(context.Context, Config) error
-	// AfterSave contains slice of funcs that runs after save
+	// AfterSave contains slice of funcs that runs after Save
 	AfterSave []func(context.Context, Config) error
+	// BeforeLoad contains slice of funcs that runs before Load
+	BeforeLoad []func(context.Context, Config) error
+	// AfterLoad contains slice of funcs that runs after Load
+	AfterLoad []func(context.Context, Config) error
+	// BeforeInit contains slice of funcs that runs before Init
+	BeforeInit []func(context.Context, Config) error
+	// AfterInit contains slice of funcs that runs after Init
+	AfterInit []func(context.Context, Config) error
 	// AllowFail flag to allow fail in config source
 	AllowFail bool
 }
@@ -131,6 +135,20 @@ 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) {

errors/errors.go

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

errors/errors.proto

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

event.go

@@ -3,7 +3,7 @@ package micro
 import (
 	"context"
 
-	"go.unistack.org/micro/v3/client"
+	"go.unistack.org/micro/v4/client"
 )
 
 // Event is used to publish messages to a topic

flow/default.go

@@ -6,12 +6,12 @@ import (
 	"sync"
 
 	"github.com/silas/dag"
-	"go.unistack.org/micro/v3/client"
-	"go.unistack.org/micro/v3/codec"
-	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v3/metadata"
-	"go.unistack.org/micro/v3/store"
-	"go.unistack.org/micro/v3/util/id"
+	"go.unistack.org/micro/v4/client"
+	"go.unistack.org/micro/v4/codec"
+	"go.unistack.org/micro/v4/logger"
+	"go.unistack.org/micro/v4/metadata"
+	"go.unistack.org/micro/v4/store"
+	"go.unistack.org/micro/v4/util/id"
 )
 
 type microFlow struct {

flow/flow.go

@@ -1,5 +1,5 @@
 // Package flow is an interface used for saga pattern microservice workflow
-package flow // import "go.unistack.org/micro/v3/flow"
+package flow // import "go.unistack.org/micro/v4/flow"
 
 import (
 	"context"
@@ -7,7 +7,7 @@ import (
 	"sync"
 	"sync/atomic"
 
-	"go.unistack.org/micro/v3/metadata"
+	"go.unistack.org/micro/v4/metadata"
 )
 
 var (

flow/options.go

@@ -4,11 +4,11 @@ import (
 	"context"
 	"time"
 
-	"go.unistack.org/micro/v3/client"
-	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v3/meter"
-	"go.unistack.org/micro/v3/store"
-	"go.unistack.org/micro/v3/tracer"
+	"go.unistack.org/micro/v4/client"
+	"go.unistack.org/micro/v4/logger"
+	"go.unistack.org/micro/v4/meter"
+	"go.unistack.org/micro/v4/store"
+	"go.unistack.org/micro/v4/tracer"
 )
 
 // Option func

fsm/fsm.go

@@ -1,4 +1,4 @@
-package fsm // import "go.unistack.org/micro/v3/fsm"
+package fsm // import "go.unistack.org/micro/v4/fsm"
 
 import (
 	"context"

fsm/fsm_test.go

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

go.mod

@@ -1,10 +1,10 @@
-module go.unistack.org/micro/v3
+module go.unistack.org/micro/v4
 
-go 1.16
+go 1.20
 
 require (
-	github.com/imdario/mergo v0.3.13
+	github.com/DATA-DOG/go-sqlmock v1.5.0
+	github.com/imdario/mergo v0.3.14
 	github.com/patrickmn/go-cache v2.1.0+incompatible
 	github.com/silas/dag v0.0.0-20211117232152-9d50aa809f35
-	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -1,10 +1,11 @@
-github.com/imdario/mergo v0.3.13 h1:lFzP57bqS/wsqKssCGmtLAb8A0wKjLGrve2q3PPVcBk=
-github.com/imdario/mergo v0.3.13/go.mod h1:4lJ1jqUDcsbIECGy0RUJAXNIhg+6ocWgb1ALK2O4oXg=
+github.com/DATA-DOG/go-sqlmock v1.5.0 h1:Shsta01QNfFxHCfpW6YH2STWB0MudeXXEWMr20OEh60=
+github.com/DATA-DOG/go-sqlmock v1.5.0/go.mod h1:f/Ixk793poVmq4qj/V1dPUg2JEAKC73Q5eFN3EC/SaM=
+github.com/imdario/mergo v0.3.14 h1:fOqeC1+nCuuk6PKQdg9YmosXX7Y7mHX6R/0ZldI9iHo=
+github.com/imdario/mergo v0.3.14/go.mod h1:WBLT9ZmE3lPoWsEzCh9LPo3TiwVN+ZKEjmz+hD27ysY=
 github.com/patrickmn/go-cache v2.1.0+incompatible h1:HRMgzkcYKYpi3C8ajMPV8OFXaaRUnok+kx1WdO15EQc=
 github.com/patrickmn/go-cache v2.1.0+incompatible/go.mod h1:3Qf8kWWT7OJRJbdiICTKqZju1ZixQ/KpMGzzAfe6+WQ=
 github.com/silas/dag v0.0.0-20211117232152-9d50aa809f35 h1:4mohWoM/UGg1BvFFiqSPRl5uwJY3rVV0HQX0ETqauqQ=
 github.com/silas/dag v0.0.0-20211117232152-9d50aa809f35/go.mod h1:7RTUFBdIRC9nZ7/3RyRNH1bdqIShrDejd1YbLwgPS+I=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v3 v3.0.0/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

logger/logger.go

@@ -1,5 +1,5 @@
 // Package logger provides a log interface
-package logger // import "go.unistack.org/micro/v3/logger"
+package logger // import "go.unistack.org/micro/v4/logger"
 
 import (
 	"context"

logger/unwrap/unwrap.go

@@ -8,7 +8,7 @@ import (
 	"strconv"
 	"strings"
 
-	"go.unistack.org/micro/v3/codec"
+	"go.unistack.org/micro/v4/codec"
 )
 
 const sf = "0-+# "

logger/unwrap/unwrap_test.go

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

logger/wrapper/wrapper.go

@@ -5,9 +5,9 @@ import (
 	"context"
 	"fmt"
 
-	"go.unistack.org/micro/v3/client"
-	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v3/server"
+	"go.unistack.org/micro/v4/client"
+	"go.unistack.org/micro/v4/logger"
+	"go.unistack.org/micro/v4/server"
 )
 
 var (

metadata/metadata.go

@@ -1,5 +1,5 @@
 // Package metadata is a way of defining message headers
-package metadata // import "go.unistack.org/micro/v3/metadata"
+package metadata // import "go.unistack.org/micro/v4/metadata"
 
 import (
 	"net/textproto"

meter/meter.go

@@ -1,5 +1,5 @@
 // Package meter is for instrumentation
-package meter // import "go.unistack.org/micro/v3/meter"
+package meter // import "go.unistack.org/micro/v4/meter"
 
 import (
 	"io"

meter/options.go

@@ -3,7 +3,7 @@ package meter
 import (
 	"context"
 
-	"go.unistack.org/micro/v3/logger"
+	"go.unistack.org/micro/v4/logger"
 )
 
 // Option powers the configuration for metrics implementations:

meter/wrapper/wrapper.go

@@ -1,13 +1,13 @@
-package wrapper // import "go.unistack.org/micro/v3/meter/wrapper"
+package wrapper // import "go.unistack.org/micro/v4/meter/wrapper"
 
 import (
 	"context"
 	"fmt"
 	"time"
 
-	"go.unistack.org/micro/v3/client"
-	"go.unistack.org/micro/v3/meter"
-	"go.unistack.org/micro/v3/server"
+	"go.unistack.org/micro/v4/client"
+	"go.unistack.org/micro/v4/meter"
+	"go.unistack.org/micro/v4/server"
 )
 
 var (

mtls/mtls.go

@@ -1,4 +1,4 @@
-package mtls // import "go.unistack.org/micro/v3/mtls"
+package mtls // import "go.unistack.org/micro/v4/mtls"
 
 import (
 	"bytes"

network/network.go

@@ -1,9 +1,9 @@
 // Package network is for creating internetworks
-package network // import "go.unistack.org/micro/v3/network"
+package network // import "go.unistack.org/micro/v4/network"
 
 import (
-	"go.unistack.org/micro/v3/client"
-	"go.unistack.org/micro/v3/server"
+	"go.unistack.org/micro/v4/client"
+	"go.unistack.org/micro/v4/server"
 )
 
 // Error is network node errors

network/options.go

@@ -1,13 +1,13 @@
 package network
 
 import (
-	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v3/meter"
-	"go.unistack.org/micro/v3/network/tunnel"
-	"go.unistack.org/micro/v3/proxy"
-	"go.unistack.org/micro/v3/router"
-	"go.unistack.org/micro/v3/tracer"
-	"go.unistack.org/micro/v3/util/id"
+	"go.unistack.org/micro/v4/logger"
+	"go.unistack.org/micro/v4/meter"
+	"go.unistack.org/micro/v4/network/tunnel"
+	"go.unistack.org/micro/v4/proxy"
+	"go.unistack.org/micro/v4/router"
+	"go.unistack.org/micro/v4/tracer"
+	"go.unistack.org/micro/v4/util/id"
 )
 
 // Option func

network/transport/memory.go

@@ -8,9 +8,9 @@ import (
 	"sync"
 	"time"
 
-	maddr "go.unistack.org/micro/v3/util/addr"
-	mnet "go.unistack.org/micro/v3/util/net"
-	"go.unistack.org/micro/v3/util/rand"
+	maddr "go.unistack.org/micro/v4/util/addr"
+	mnet "go.unistack.org/micro/v4/util/net"
+	"go.unistack.org/micro/v4/util/rand"
 )
 
 type memorySocket struct {

network/transport/options.go

@@ -5,10 +5,10 @@ import (
 	"crypto/tls"
 	"time"
 
-	"go.unistack.org/micro/v3/codec"
-	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v3/meter"
-	"go.unistack.org/micro/v3/tracer"
+	"go.unistack.org/micro/v4/codec"
+	"go.unistack.org/micro/v4/logger"
+	"go.unistack.org/micro/v4/meter"
+	"go.unistack.org/micro/v4/tracer"
 )
 
 // Options struct holds the transport options

network/transport/transport.go

@@ -1,11 +1,11 @@
 // Package transport is an interface for synchronous connection based communication
-package transport // import "go.unistack.org/micro/v3/network/transport"
+package transport // import "go.unistack.org/micro/v4/network/transport"
 
 import (
 	"context"
 	"time"
 
-	"go.unistack.org/micro/v3/metadata"
+	"go.unistack.org/micro/v4/metadata"
 )
 
 var (

network/tunnel/broker/broker.go

@@ -1,15 +1,15 @@
 // Package broker is a tunnel broker
-package broker // import "go.unistack.org/micro/v3/network/tunnel/broker"
+package broker // import "go.unistack.org/micro/v4/network/tunnel/broker"
 
 import (
 	"context"
 	"fmt"
 
-	"go.unistack.org/micro/v3/broker"
-	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v3/metadata"
-	"go.unistack.org/micro/v3/network/transport"
-	"go.unistack.org/micro/v3/network/tunnel"
+	"go.unistack.org/micro/v4/broker"
+	"go.unistack.org/micro/v4/logger"
+	"go.unistack.org/micro/v4/metadata"
+	"go.unistack.org/micro/v4/network/transport"
+	"go.unistack.org/micro/v4/network/tunnel"
 )
 
 type tunBroker struct {

network/tunnel/options.go

@@ -3,11 +3,11 @@ package tunnel
 import (
 	"time"
 
-	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v3/meter"
-	"go.unistack.org/micro/v3/network/transport"
-	"go.unistack.org/micro/v3/tracer"
-	"go.unistack.org/micro/v3/util/id"
+	"go.unistack.org/micro/v4/logger"
+	"go.unistack.org/micro/v4/meter"
+	"go.unistack.org/micro/v4/network/transport"
+	"go.unistack.org/micro/v4/tracer"
+	"go.unistack.org/micro/v4/util/id"
 )
 
 var (

network/tunnel/transport/listener.go

@@ -1,8 +1,8 @@
 package transport
 
 import (
-	"go.unistack.org/micro/v3/network/transport"
-	"go.unistack.org/micro/v3/network/tunnel"
+	"go.unistack.org/micro/v4/network/transport"
+	"go.unistack.org/micro/v4/network/tunnel"
 )
 
 type tunListener struct {

network/tunnel/transport/transport.go

@@ -1,12 +1,12 @@
 // Package transport provides a tunnel transport
-package transport // import "go.unistack.org/micro/v3/network/tunnel/transport"
+package transport // import "go.unistack.org/micro/v4/network/tunnel/transport"
 
 import (
 	"context"
 	"fmt"
 
-	"go.unistack.org/micro/v3/network/transport"
-	"go.unistack.org/micro/v3/network/tunnel"
+	"go.unistack.org/micro/v4/network/transport"
+	"go.unistack.org/micro/v4/network/tunnel"
 )
 
 type tunTransport struct {

network/tunnel/tunnel.go

@@ -1,12 +1,12 @@
 // Package tunnel provides gre network tunnelling
-package tunnel // import "go.unistack.org/micro/v3/network/transport/tunnel"
+package tunnel // import "go.unistack.org/micro/v4/network/transport/tunnel"
 
 import (
 	"context"
 	"errors"
 	"time"
 
-	"go.unistack.org/micro/v3/network/transport"
+	"go.unistack.org/micro/v4/network/transport"
 )
 
 // DefaultTunnel contains default tunnel implementation

options.go

@@ -5,17 +5,17 @@ import (
 	"fmt"
 	"time"
 
-	"go.unistack.org/micro/v3/broker"
-	"go.unistack.org/micro/v3/client"
-	"go.unistack.org/micro/v3/config"
-	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v3/metadata"
-	"go.unistack.org/micro/v3/meter"
-	"go.unistack.org/micro/v3/register"
-	"go.unistack.org/micro/v3/router"
-	"go.unistack.org/micro/v3/server"
-	"go.unistack.org/micro/v3/store"
-	"go.unistack.org/micro/v3/tracer"
+	"go.unistack.org/micro/v4/broker"
+	"go.unistack.org/micro/v4/client"
+	"go.unistack.org/micro/v4/config"
+	"go.unistack.org/micro/v4/logger"
+	"go.unistack.org/micro/v4/metadata"
+	"go.unistack.org/micro/v4/meter"
+	"go.unistack.org/micro/v4/register"
+	"go.unistack.org/micro/v4/router"
+	"go.unistack.org/micro/v4/server"
+	"go.unistack.org/micro/v4/store"
+	"go.unistack.org/micro/v4/tracer"
 )
 
 // Options for micro service
@@ -211,6 +211,7 @@ func Stores(s ...store.Store) Option {
 }
 
 // Logger set the logger to use
+//
 //nolint:gocyclo
 func Logger(l logger.Logger, opts ...LoggerOption) Option {
 	return func(o *Options) error {
@@ -329,6 +330,7 @@ func Meters(m ...meter.Meter) Option {
 
 // Register sets the register for the service
 // and the underlying components
+//
 //nolint:gocyclo
 func Register(r register.Register, opts ...RegisterOption) Option {
 	return func(o *Options) error {
@@ -403,6 +405,7 @@ func RegisterBroker(n string) RegisterOption {
 }
 
 // Tracer sets the tracer
+//
 //nolint:gocyclo
 func Tracer(t tracer.Tracer, opts ...TracerOption) Option {
 	return func(o *Options) error {

options/hooks.go

@@ -0,0 +1,31 @@
+package options // import "go.unistack.org/micro/v4/options"
+
+// Hook func interface
+type Hook interface{}
+
+// Hooks func slice
+type Hooks []Hook
+
+// Append is used to add hooks
+func (hs *Hooks) Append(h ...Hook) {
+	*hs = append(*hs, h...)
+}
+
+// Replace is used to set hooks
+func (hs *Hooks) Replace(h ...Hook) {
+	*hs = h
+}
+
+// EachNext is used to itearate over hooks forward
+func (hs *Hooks) EachNext(fn func(Hook)) {
+	for idx := 0; idx < len(*hs); idx++ {
+		fn((*hs)[idx])
+	}
+}
+
+// EachPrev is used to iterate over hooks backward
+func (hs *Hooks) EachPrev(fn func(Hook)) {
+	for idx := len(*hs) - 1; idx >= 0; idx-- {
+		fn((*hs)[idx])
+	}
+}

options/hooks_test.go

@@ -0,0 +1,65 @@
+package options
+
+import "testing"
+
+func TestHooks_Append(t *testing.T) {
+	fn1 := func() {}
+	fn2 := func() {}
+	hs := &Hooks{}
+	hs.Append(fn1, fn2)
+	if len(*hs) != 2 {
+		t.Fatalf("unexpected Append error")
+	}
+}
+
+func TestHooks_Replace(t *testing.T) {
+	fn1 := func() {}
+	fn2 := func() {}
+	hs := &Hooks{}
+	hs.Append(fn1, fn2, fn1)
+	if len(*hs) != 3 {
+		t.Fatalf("unexpected Append error")
+	}
+	hs.Replace(fn1, fn2)
+	if len(*hs) != 2 {
+		t.Fatalf("unexpected Replace error")
+	}
+}
+
+func TestHooks_EachNext(t *testing.T) {
+	n := 5
+	fn1 := func() {
+		n *= 2
+	}
+	fn2 := func() {
+		n -= 10
+	}
+	hs := &Hooks{}
+	hs.Append(fn1, fn2)
+
+	hs.EachNext(func(h Hook) {
+		h.(func())()
+	})
+	if n != 0 {
+		t.Fatalf("unexpected EachNext")
+	}
+}
+
+func TestHooks_EachPrev(t *testing.T) {
+	n := 5
+	fn1 := func() {
+		n *= 2
+	}
+	fn2 := func() {
+		n -= 10
+	}
+	hs := &Hooks{}
+	hs.Append(fn2, fn1)
+
+	hs.EachPrev(func(h Hook) {
+		h.(func())()
+	})
+	if n != 0 {
+		t.Fatalf("unexpected EachPrev")
+	}
+}

profiler/http/http.go

@@ -1,5 +1,5 @@
 // Package http enables the http profiler
-package http // import "go.unistack.org/micro/v3/profiler/http"
+package http // import "go.unistack.org/micro/v4/profiler/http"
 
 import (
 	"context"
@@ -7,7 +7,7 @@ import (
 	"net/http/pprof"
 	"sync"
 
-	profile "go.unistack.org/micro/v3/profiler"
+	profile "go.unistack.org/micro/v4/profiler"
 )
 
 type httpProfile struct {

profiler/pprof/pprof.go

@@ -1,5 +1,5 @@
 // Package pprof provides a pprof profiler which writes output to /tmp/[name].{cpu,mem}.pprof
-package pprof // import "go.unistack.org/micro/v3/profiler/pprof"
+package pprof // import "go.unistack.org/micro/v4/profiler/pprof"
 
 import (
 	"os"
@@ -9,7 +9,7 @@ import (
 	"sync"
 	"time"
 
-	profile "go.unistack.org/micro/v3/profiler"
+	profile "go.unistack.org/micro/v4/profiler"
 )
 
 type profiler struct {

profiler/profile.go

@@ -1,5 +1,5 @@
 // Package profiler is for profilers
-package profiler // import "go.unistack.org/micro/v3/profiler"
+package profiler // import "go.unistack.org/micro/v4/profiler"
 
 // Profiler interface
 type Profiler interface {

proxy/options.go

@@ -2,11 +2,11 @@
 package proxy
 
 import (
-	"go.unistack.org/micro/v3/client"
-	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v3/meter"
-	"go.unistack.org/micro/v3/router"
-	"go.unistack.org/micro/v3/tracer"
+	"go.unistack.org/micro/v4/client"
+	"go.unistack.org/micro/v4/logger"
+	"go.unistack.org/micro/v4/meter"
+	"go.unistack.org/micro/v4/router"
+	"go.unistack.org/micro/v4/tracer"
 )
 
 // Options for proxy

proxy/proxy.go

@@ -1,10 +1,10 @@
 // Package proxy is a transparent proxy built on the micro/server
-package proxy // import "go.unistack.org/micro/v3/proxy"
+package proxy // import "go.unistack.org/micro/v4/proxy"
 
 import (
 	"context"
 
-	"go.unistack.org/micro/v3/server"
+	"go.unistack.org/micro/v4/server"
 )
 
 // DefaultEndpoint holds default proxy address

register/extractor.go

@@ -6,7 +6,7 @@ import (
 	"unicode"
 	"unicode/utf8"
 
-	"go.unistack.org/micro/v3/metadata"
+	"go.unistack.org/micro/v4/metadata"
 )
 
 // ExtractValue from reflect.Type from specified depth

register/memory.go

@@ -5,8 +5,8 @@ import (
 	"sync"
 	"time"
 
-	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v3/util/id"
+	"go.unistack.org/micro/v4/logger"
+	"go.unistack.org/micro/v4/util/id"
 )
 
 var (

register/options.go

@@ -5,9 +5,9 @@ import (
 	"crypto/tls"
 	"time"
 
-	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v3/meter"
-	"go.unistack.org/micro/v3/tracer"
+	"go.unistack.org/micro/v4/logger"
+	"go.unistack.org/micro/v4/meter"
+	"go.unistack.org/micro/v4/tracer"
 )
 
 // Options holds options for register

register/register.go

@@ -1,11 +1,11 @@
 // Package register is an interface for service discovery
-package register // import "go.unistack.org/micro/v3/register"
+package register // import "go.unistack.org/micro/v4/register"
 
 import (
 	"context"
 	"errors"
 
-	"go.unistack.org/micro/v3/metadata"
+	"go.unistack.org/micro/v4/metadata"
 )
 
 const (

resolver/dns/dns.go

@@ -1,5 +1,5 @@
 // Package dns resolves names to dns records
-package dns // import "go.unistack.org/micro/v3/resolver/dns"
+package dns // import "go.unistack.org/micro/v4/resolver/dns"
 
 import (
 	"context"
@@ -7,7 +7,7 @@ import (
 	"sync"
 	"time"
 
-	"go.unistack.org/micro/v3/resolver"
+	"go.unistack.org/micro/v4/resolver"
 )
 
 // Resolver is a DNS network resolve

resolver/dnssrv/dnssrv.go

@@ -1,11 +1,11 @@
 // Package dnssrv resolves names to dns srv records
-package dnssrv // import "go.unistack.org/micro/v3/resolver/dnssrv"
+package dnssrv // import "go.unistack.org/micro/v4/resolver/dnssrv"
 
 import (
 	"fmt"
 	"net"
 
-	"go.unistack.org/micro/v3/resolver"
+	"go.unistack.org/micro/v4/resolver"
 )
 
 // Resolver is a DNS network resolve

resolver/http/http.go

@@ -1,5 +1,5 @@
 // Package http resolves names to network addresses using a http request
-package http // import "go.unistack.org/micro/v3/resolver/http"
+package http // import "go.unistack.org/micro/v4/resolver/http"
 
 import (
 	"encoding/json"
@@ -8,7 +8,7 @@ import (
 	"net/http"
 	"net/url"
 
-	"go.unistack.org/micro/v3/resolver"
+	"go.unistack.org/micro/v4/resolver"
 )
 
 // nolint: golint,revive

resolver/noop/noop.go

@@ -1,8 +1,8 @@
 // Package noop is a noop resolver
-package noop // import "go.unistack.org/micro/v3/resolver/noop"
+package noop // import "go.unistack.org/micro/v4/resolver/noop"
 
 import (
-	"go.unistack.org/micro/v3/resolver"
+	"go.unistack.org/micro/v4/resolver"
 )
 
 // Resolver contains noop resolver

resolver/registry/registry.go

@@ -1,11 +1,11 @@
 // Package register resolves names using the micro register
-package register // import "go.unistack.org/micro/v3/resolver/registry"
+package register // import "go.unistack.org/micro/v4/resolver/registry"
 
 import (
 	"context"
 
-	"go.unistack.org/micro/v3/register"
-	"go.unistack.org/micro/v3/resolver"
+	"go.unistack.org/micro/v4/register"
+	"go.unistack.org/micro/v4/resolver"
 )
 
 // Resolver is a register network resolver

resolver/resolver.go

@@ -1,5 +1,5 @@
 // Package resolver resolves network names to addresses
-package resolver // import "go.unistack.org/micro/v3/resolver"
+package resolver // import "go.unistack.org/micro/v4/resolver"
 
 // Resolver is network resolver. It's used to find network nodes
 // via the name to connect to. This is done based on Network.Name().

resolver/static/static.go

@@ -1,8 +1,8 @@
 // Package static is a static resolver
-package static // import "go.unistack.org/micro/v3/resolver/static"
+package static // import "go.unistack.org/micro/v4/resolver/static"
 
 import (
-	"go.unistack.org/micro/v3/resolver"
+	"go.unistack.org/micro/v4/resolver"
 )
 
 // Resolver returns a static list of nodes. In the event the node list

router/options.go

@@ -3,9 +3,9 @@ package router
 import (
 	"context"
 
-	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v3/register"
-	"go.unistack.org/micro/v3/util/id"
+	"go.unistack.org/micro/v4/logger"
+	"go.unistack.org/micro/v4/register"
+	"go.unistack.org/micro/v4/util/id"
 )
 
 // Options are router options

router/route.go

@@ -3,7 +3,7 @@ package router
 import (
 	"hash/fnv"
 
-	"go.unistack.org/micro/v3/metadata"
+	"go.unistack.org/micro/v4/metadata"
 )
 
 var (

router/router.go

@@ -1,5 +1,5 @@
 // Package router provides a network routing control plane
-package router // import "go.unistack.org/micro/v3/router"
+package router // import "go.unistack.org/micro/v4/router"
 
 import (
 	"errors"

selector/random/random.go

@@ -1,8 +1,8 @@
-package random // import "go.unistack.org/micro/v3/selector/random"
+package random // import "go.unistack.org/micro/v4/selector/random"
 
 import (
-	"go.unistack.org/micro/v3/selector"
-	"go.unistack.org/micro/v3/util/rand"
+	"go.unistack.org/micro/v4/selector"
+	"go.unistack.org/micro/v4/util/rand"
 )
 
 type random struct{}

selector/random/random_test.go

@@ -3,7 +3,7 @@ package random
 import (
 	"testing"
 
-	"go.unistack.org/micro/v3/selector"
+	"go.unistack.org/micro/v4/selector"
 )
 
 func TestRandom(t *testing.T) {

selector/roundrobin/roundrobin.go

@@ -1,8 +1,8 @@
-package roundrobin // import "go.unistack.org/micro/v3/selector/roundrobin"
+package roundrobin // import "go.unistack.org/micro/v4/selector/roundrobin"
 
 import (
-	"go.unistack.org/micro/v3/selector"
-	"go.unistack.org/micro/v3/util/rand"
+	"go.unistack.org/micro/v4/selector"
+	"go.unistack.org/micro/v4/util/rand"
 )
 
 // NewSelector returns an initialised round robin selector

selector/roundrobin/roundrobin_test.go

@@ -3,7 +3,7 @@ package roundrobin
 import (
 	"testing"
 
-	"go.unistack.org/micro/v3/selector"
+	"go.unistack.org/micro/v4/selector"
 )
 
 func TestRoundRobin(t *testing.T) {

selector/selector.go

@@ -1,5 +1,5 @@
 // Package selector is for node selection and load balancing
-package selector // import "go.unistack.org/micro/v3/selector"
+package selector // import "go.unistack.org/micro/v4/selector"
 
 import (
 	"errors"

server/errors.go

@@ -1,6 +1,6 @@
 package server
 
-import "go.unistack.org/micro/v3/errors"
+import "go.unistack.org/micro/v4/errors"
 
 type Error struct {
 	id string

server/errors_test.go

@@ -3,7 +3,7 @@ package server
 import (
 	"testing"
 
-	"go.unistack.org/micro/v3/errors"
+	"go.unistack.org/micro/v4/errors"
 )
 
 func TestError(t *testing.T) {

server/handler.go

@@ -3,7 +3,7 @@ package server
 import (
 	"reflect"
 
-	"go.unistack.org/micro/v3/register"
+	"go.unistack.org/micro/v4/register"
 )
 
 type rpcHandler struct {

server/noop.go

@@ -6,13 +6,13 @@ import (
 	"sync"
 	"time"
 
-	"go.unistack.org/micro/v3/broker"
-	"go.unistack.org/micro/v3/codec"
-	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v3/register"
-	maddr "go.unistack.org/micro/v3/util/addr"
-	mnet "go.unistack.org/micro/v3/util/net"
-	"go.unistack.org/micro/v3/util/rand"
+	"go.unistack.org/micro/v4/broker"
+	"go.unistack.org/micro/v4/codec"
+	"go.unistack.org/micro/v4/logger"
+	"go.unistack.org/micro/v4/register"
+	maddr "go.unistack.org/micro/v4/util/addr"
+	mnet "go.unistack.org/micro/v4/util/net"
+	"go.unistack.org/micro/v4/util/rand"
 )
 
 // DefaultCodecs will be used to encode/decode

server/noop_test.go

@@ -5,12 +5,12 @@ import (
 	"fmt"
 	"testing"
 
-	"go.unistack.org/micro/v3/broker"
-	"go.unistack.org/micro/v3/client"
-	"go.unistack.org/micro/v3/codec"
-	"go.unistack.org/micro/v3/logger"
-	"go.unistack.org/micro/v3/metadata"
-	"go.unistack.org/micro/v3/server"
+	"go.unistack.org/micro/v4/broker"
+	"go.unistack.org/micro/v4/client"
+	"go.unistack.org/micro/v4/codec"
+	"go.unistack.org/micro/v4/logger"
+	"go.unistack.org/micro/v4/metadata"
+	"go.unistack.org/micro/v4/server"
 )
 
 type TestHandler struct {