meter: add Clone method

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

.github/workflows/dependabot-automerge.yml

@@ -25,7 +25,7 @@ jobs:
           || (github.event.workflow_run.event == 'push' && github.event.workflow_run.pull_requests[0].base.ref == github.event.repository.default_branch ))
     steps:
       - name: Approve Changes and Merge changes if label 'dependencies' is set
-        uses: actions/github-script@v4
+        uses: actions/github-script@v5
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           script: |

.golangci.yml

@@ -30,7 +30,7 @@ linters:
     - gofmt
     - gofumpt
     - goimports
-    - golint
+    - revive
     - gosec
     - makezero
     - misspell

api/api.go

@@ -1,15 +1,16 @@
-package api
+package api // import "go.unistack.org/micro/v3/api"
 
 import (
 	"errors"
 	"regexp"
 	"strings"
 
-	"github.com/unistack-org/micro/v3/metadata"
+	"go.unistack.org/micro/v3/metadata"
-	"github.com/unistack-org/micro/v3/register"
+	"go.unistack.org/micro/v3/register"
-	"github.com/unistack-org/micro/v3/server"
+	"go.unistack.org/micro/v3/server"
 )
 
+// nolint: revive
 // Api interface
 type Api interface {
 	// Initialise options
@@ -125,14 +126,14 @@ func Validate(e *Endpoint) error {
 		ps := p[0]
 		pe := p[len(p)-1]
 
-		if ps == '^' && pe == '$' {
+		switch {
-			_, err := regexp.CompilePOSIX(p)
+		case ps == '^' && pe == '$':
-			if err != nil {
+			if _, err := regexp.CompilePOSIX(p); err != nil {
 				return err
 			}
-		} else if ps == '^' && pe != '$' {
+		case ps == '^' && pe != '$':
 			return errors.New("invalid path")
-		} else if ps != '^' && pe == '$' {
+		case ps != '^' && pe == '$':
 			return errors.New("invalid path")
 		}
 	}

api/handler/handler.go

@@ -1,5 +1,5 @@
 // Package handler provides http handlers
-package handler
+package handler // import "go.unistack.org/micro/v3/api/handler"
 
 import (
 	"net/http"

api/handler/options.go

@@ -1,9 +1,9 @@
 package handler
 
 import (
-	"github.com/unistack-org/micro/v3/api/router"
+	"go.unistack.org/micro/v3/api/router"
-	"github.com/unistack-org/micro/v3/client"
+	"go.unistack.org/micro/v3/client"
-	"github.com/unistack-org/micro/v3/logger"
+	"go.unistack.org/micro/v3/logger"
 )
 
 // DefaultMaxRecvSize specifies max recv size for handler

api/resolver/grpc/grpc.go

@@ -1,12 +1,12 @@
 // Package grpc resolves a grpc service like /greeter.Say/Hello to greeter service
-package grpc
+package grpc // import "go.unistack.org/micro/v3/api/resolver/grpc"
 
 import (
 	"errors"
 	"net/http"
 	"strings"
 
-	"github.com/unistack-org/micro/v3/api/resolver"
+	"go.unistack.org/micro/v3/api/resolver"
 )
 
 // Resolver struct

api/resolver/host/host.go

@@ -1,10 +1,10 @@
 // Package host resolves using http host
-package host
+package host // import "go.unistack.org/micro/v3/api/resolver/host"
 
 import (
 	"net/http"
 
-	"github.com/unistack-org/micro/v3/api/resolver"
+	"go.unistack.org/micro/v3/api/resolver"
 )
 
 type hostResolver struct {

api/resolver/options.go

@@ -3,7 +3,7 @@ package resolver
 import (
 	"context"
 
-	"github.com/unistack-org/micro/v3/register"
+	"go.unistack.org/micro/v3/register"
 )
 
 // Options struct

api/resolver/path/path.go

@@ -1,11 +1,11 @@
 // Package path resolves using http path
-package path
+package path // import "go.unistack.org/micro/v3/api/resolver/path"
 
 import (
 	"net/http"
 	"strings"
 
-	"github.com/unistack-org/micro/v3/api/resolver"
+	"go.unistack.org/micro/v3/api/resolver"
 )
 
 // Resolver the path resolver

api/resolver/resolver.go

@@ -1,5 +1,5 @@
 // Package resolver resolves a http request to an endpoint
-package resolver
+package resolver // import "go.unistack.org/micro/v3/api/resolver"
 
 import (
 	"errors"

api/resolver/subdomain/subdomain.go

@@ -1,14 +1,14 @@
 // Package subdomain is a resolver which uses the subdomain to determine the domain to route to. It
 // offloads the endpoint resolution to a child resolver which is provided in New.
-package subdomain
+package subdomain // import "go.unistack.org/micro/v3/api/resolver/subdomain"
 
 import (
 	"net"
 	"net/http"
 	"strings"
 
-	"github.com/unistack-org/micro/v3/api/resolver"
+	"go.unistack.org/micro/v3/api/resolver"
-	"github.com/unistack-org/micro/v3/logger"
+	"go.unistack.org/micro/v3/logger"
 	"golang.org/x/net/publicsuffix"
 )
 

api/resolver/subdomain/subdomain_test.go

@@ -5,7 +5,7 @@ import (
 	"net/url"
 	"testing"
 
-	"github.com/unistack-org/micro/v3/api/resolver/vpath"
+	"go.unistack.org/micro/v3/api/resolver/vpath"
 )
 
 func TestResolve(t *testing.T) {

api/resolver/vpath/vpath.go

@@ -1,5 +1,5 @@
 // Package vpath resolves using http path and recognised versioned urls
-package vpath
+package vpath // import "go.unistack.org/micro/v3/api/resolver/vpath"
 
 import (
 	"errors"
@@ -7,7 +7,7 @@ import (
 	"regexp"
 	"strings"
 
-	"github.com/unistack-org/micro/v3/api/resolver"
+	"go.unistack.org/micro/v3/api/resolver"
 )
 
 // NewResolver creates new vpath api resolver

api/router/options.go

@@ -3,10 +3,10 @@ package router
 import (
 	"context"
 
-	"github.com/unistack-org/micro/v3/api/resolver"
+	"go.unistack.org/micro/v3/api/resolver"
-	"github.com/unistack-org/micro/v3/api/resolver/vpath"
+	"go.unistack.org/micro/v3/api/resolver/vpath"
-	"github.com/unistack-org/micro/v3/logger"
+	"go.unistack.org/micro/v3/logger"
-	"github.com/unistack-org/micro/v3/register"
+	"go.unistack.org/micro/v3/register"
 )
 
 // Options holds the options for api router

api/router/router.go

@@ -1,10 +1,10 @@
 // Package router provides api service routing
-package router
+package router // import "go.unistack.org/micro/v3/api/router"
 
 import (
 	"net/http"
 
-	"github.com/unistack-org/micro/v3/api"
+	"go.unistack.org/micro/v3/api"
 )
 
 // DefaultRouter contains default router implementation

auth/auth.go

@@ -1,12 +1,12 @@
 // Package auth provides authentication and authorization capability
-package auth
+package auth // import "go.unistack.org/micro/v3/auth"
 
 import (
 	"context"
 	"errors"
 	"time"
 
-	"github.com/unistack-org/micro/v3/metadata"
+	"go.unistack.org/micro/v3/metadata"
 )
 
 const (

auth/noop.go

@@ -1,7 +1,7 @@
 package auth
 
 import (
-	"github.com/unistack-org/micro/v3/util/id"
+	"go.unistack.org/micro/v3/util/id"
 )
 
 type noopAuth struct {

auth/options.go

@@ -4,11 +4,11 @@ import (
 	"context"
 	"time"
 
-	"github.com/unistack-org/micro/v3/logger"
+	"go.unistack.org/micro/v3/logger"
-	"github.com/unistack-org/micro/v3/metadata"
+	"go.unistack.org/micro/v3/metadata"
-	"github.com/unistack-org/micro/v3/meter"
+	"go.unistack.org/micro/v3/meter"
-	"github.com/unistack-org/micro/v3/store"
+	"go.unistack.org/micro/v3/store"
-	"github.com/unistack-org/micro/v3/tracer"
+	"go.unistack.org/micro/v3/tracer"
 )
 
 // NewOptions creates Options struct from slice of options

broker/broker.go

@@ -1,11 +1,11 @@
 // Package broker is an interface used for asynchronous messaging
-package broker
+package broker // import "go.unistack.org/micro/v3/broker"
 
 import (
 	"context"
 	"errors"
 
-	"github.com/unistack-org/micro/v3/metadata"
+	"go.unistack.org/micro/v3/metadata"
 )
 
 // DefaultBroker default memory broker

broker/memory.go

@@ -4,12 +4,12 @@ import (
 	"context"
 	"sync"
 
-	"github.com/unistack-org/micro/v3/logger"
+	"go.unistack.org/micro/v3/logger"
-	"github.com/unistack-org/micro/v3/metadata"
+	"go.unistack.org/micro/v3/metadata"
-	maddr "github.com/unistack-org/micro/v3/util/addr"
+	maddr "go.unistack.org/micro/v3/util/addr"
-	"github.com/unistack-org/micro/v3/util/id"
+	"go.unistack.org/micro/v3/util/id"
-	mnet "github.com/unistack-org/micro/v3/util/net"
+	mnet "go.unistack.org/micro/v3/util/net"
-	"github.com/unistack-org/micro/v3/util/rand"
+	"go.unistack.org/micro/v3/util/rand"
 )
 
 type memoryBroker struct {
@@ -89,36 +89,15 @@ func (m *memoryBroker) Init(opts ...Option) error {
 }
 
 func (m *memoryBroker) Publish(ctx context.Context, topic string, msg *Message, opts ...PublishOption) error {
-	m.RLock()
+	msg.Header.Set(metadata.HeaderTopic, topic)
-	if !m.connected {
+	return m.publish(ctx, []*Message{msg}, opts...)
-		m.RUnlock()
-		return ErrNotConnected
-	}
-	m.RUnlock()
-
-	options := NewPublishOptions(opts...)
-	vs := make([]msgWrapper, 0, 1)
-	if m.opts.Codec == nil || options.BodyOnly {
-		topic, _ := msg.Header.Get(metadata.HeaderTopic)
-		vs = append(vs, msgWrapper{topic: topic, body: msg})
-	} else {
-		topic, _ := msg.Header.Get(metadata.HeaderTopic)
-		buf, err := m.opts.Codec.Marshal(msg)
-		if err != nil {
-			return err
-		}
-		vs = append(vs, msgWrapper{topic: topic, body: buf})
-	}
-
-	return m.publish(ctx, vs, opts...)
-}
-
-type msgWrapper struct {
-	topic string
-	body  interface{}
 }
 
 func (m *memoryBroker) BatchPublish(ctx context.Context, msgs []*Message, opts ...PublishOption) error {
+	return m.publish(ctx, msgs, opts...)
+}
+
+func (m *memoryBroker) publish(ctx context.Context, msgs []*Message, opts ...PublishOption) error {
 	m.RLock()
 	if !m.connected {
 		m.RUnlock()
@@ -126,88 +105,81 @@ func (m *memoryBroker) BatchPublish(ctx context.Context, msgs []*Message, opts .
 	}
 	m.RUnlock()
 
-	options := NewPublishOptions(opts...)
-	vs := make([]msgWrapper, 0, len(msgs))
-	if m.opts.Codec == nil || options.BodyOnly {
-		for _, msg := range msgs {
-			topic, _ := msg.Header.Get(metadata.HeaderTopic)
-			vs = append(vs, msgWrapper{topic: topic, body: msg})
-		}
-	} else {
-		for _, msg := range msgs {
-			topic, _ := msg.Header.Get(metadata.HeaderTopic)
-			buf, err := m.opts.Codec.Marshal(msg)
-			if err != nil {
-				return err
-			}
-			vs = append(vs, msgWrapper{topic: topic, body: buf})
-		}
-	}
-
-	return m.publish(ctx, vs, opts...)
-}
-
-func (m *memoryBroker) publish(ctx context.Context, vs []msgWrapper, opts ...PublishOption) error {
 	var err error
 
-	msgTopicMap := make(map[string]Events)
+	select {
-	for _, v := range vs {
+	case <-ctx.Done():
-		p := &memoryEvent{
+		return ctx.Err()
-			topic:   v.topic,
+	default:
-			message: v.body,
+		options := NewPublishOptions(opts...)
-			opts:    m.opts,
-		}
-		msgTopicMap[p.topic] = append(msgTopicMap[p.topic], p)
-	}
 
-	beh := m.opts.BatchErrorHandler
+		msgTopicMap := make(map[string]Events)
-	eh := m.opts.ErrorHandler
+		for _, v := range msgs {
+			p := &memoryEvent{opts: m.opts}
 
-	for t, ms := range msgTopicMap {
+			if m.opts.Codec == nil || options.BodyOnly {
-		m.RLock()
+				p.topic, _ = v.Header.Get(metadata.HeaderTopic)
-		subs, ok := m.subscribers[t]
+				p.message = v.Body
-		m.RUnlock()
+			} else {
-		if !ok {
+				p.topic, _ = v.Header.Get(metadata.HeaderTopic)
-			continue
+				p.message, err = m.opts.Codec.Marshal(v)
-		}
+				if err != nil {
-
+					return err
-		for _, sub := range subs {
-			// batch processing
-			if sub.batchhandler != nil {
-				if err = sub.batchhandler(ms); err != nil {
-					ms.SetError(err)
-					if sub.opts.BatchErrorHandler != nil {
-						beh = sub.opts.BatchErrorHandler
-					}
-					if beh != nil {
-						beh(ms)
-					} else if m.opts.Logger.V(logger.ErrorLevel) {
-						m.opts.Logger.Error(m.opts.Context, err.Error())
-					}
-				} else if sub.opts.AutoAck {
-					if err = ms.Ack(); err != nil {
-						m.opts.Logger.Errorf(m.opts.Context, "ack failed: %v", err)
-					}
 				}
 			}
-			// single processing
+			msgTopicMap[p.topic] = append(msgTopicMap[p.topic], p)
-			if sub.handler != nil {
+		}
-				for _, p := range ms {
+
-					if err = sub.handler(p); err != nil {
+		beh := m.opts.BatchErrorHandler
-						p.SetError(err)
+		eh := m.opts.ErrorHandler
-						if sub.opts.ErrorHandler != nil {
+
-							eh = sub.opts.ErrorHandler
+		for t, ms := range msgTopicMap {
-						}
+			m.RLock()
-						if eh != nil {
+			subs, ok := m.subscribers[t]
-							eh(p)
+			m.RUnlock()
+			if !ok {
+				continue
+			}
+
+			for _, sub := range subs {
+				if sub.opts.BatchErrorHandler != nil {
+					beh = sub.opts.BatchErrorHandler
+				}
+				if sub.opts.ErrorHandler != nil {
+					eh = sub.opts.ErrorHandler
+				}
+
+				switch {
+				// batch processing
+				case sub.batchhandler != nil:
+					if err = sub.batchhandler(ms); err != nil {
+						ms.SetError(err)
+						if beh != nil {
+							_ = beh(ms)
 						} else if m.opts.Logger.V(logger.ErrorLevel) {
 							m.opts.Logger.Error(m.opts.Context, err.Error())
 						}
 					} else if sub.opts.AutoAck {
-						if err = p.Ack(); err != nil {
+						if err = ms.Ack(); err != nil {
 							m.opts.Logger.Errorf(m.opts.Context, "ack failed: %v", err)
 						}
 					}
+					// single processing
+				case sub.handler != nil:
+					for _, p := range ms {
+						if err = sub.handler(p); err != nil {
+							p.SetError(err)
+							if eh != nil {
+								_ = eh(p)
+							} else if m.opts.Logger.V(logger.ErrorLevel) {
+								m.opts.Logger.Error(m.opts.Context, err.Error())
+							}
+						} else if sub.opts.AutoAck {
+							if err = p.Ack(); err != nil {
+								m.opts.Logger.Errorf(m.opts.Context, "ack failed: %v", err)
+							}
+						}
+					}
 				}
 			}
 		}

broker/memory_test.go

@@ -5,7 +5,7 @@ import (
 	"fmt"
 	"testing"
 
-	"github.com/unistack-org/micro/v3/metadata"
+	"go.unistack.org/micro/v3/metadata"
 )
 
 func TestMemoryBatchBroker(t *testing.T) {
@@ -28,7 +28,7 @@ func TestMemoryBatchBroker(t *testing.T) {
 		t.Fatalf("Unexpected error subscribing %v", err)
 	}
 
-	msgs := make([]*Message, 0, 0)
+	msgs := make([]*Message, 0, count)
 	for i := 0; i < count; i++ {
 		message := &Message{
 			Header: map[string]string{
@@ -53,6 +53,7 @@ func TestMemoryBatchBroker(t *testing.T) {
 		t.Fatalf("Unexpected connect error %v", err)
 	}
 }
+
 func TestMemoryBroker(t *testing.T) {
 	b := NewBroker()
 	ctx := context.Background()
@@ -73,7 +74,7 @@ func TestMemoryBroker(t *testing.T) {
 		t.Fatalf("Unexpected error subscribing %v", err)
 	}
 
-	msgs := make([]*Message, 0, 0)
+	msgs := make([]*Message, 0, count)
 	for i := 0; i < count; i++ {
 		message := &Message{
 			Header: map[string]string{

broker/options.go

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

build/build.go

@@ -1,5 +1,5 @@
 // Package build is for building source into a package
-package build
+package build // import "go.unistack.org/micro/v3/build"
 
 // Build is an interface for building packages
 type Build interface {

client/backoff.go

@@ -4,7 +4,7 @@ import (
 	"context"
 	"time"
 
-	"github.com/unistack-org/micro/v3/util/backoff"
+	"go.unistack.org/micro/v3/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
+package client // import "go.unistack.org/micro/v3/client"
 
 import (
 	"context"
 	"time"
 
-	"github.com/unistack-org/micro/v3/codec"
+	"go.unistack.org/micro/v3/codec"
-	"github.com/unistack-org/micro/v3/metadata"
+	"go.unistack.org/micro/v3/metadata"
 )
 
 var (

client/lookup.go

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

client/noop.go

@@ -3,10 +3,10 @@ package client
 import (
 	"context"
 
-	"github.com/unistack-org/micro/v3/broker"
+	"go.unistack.org/micro/v3/broker"
-	"github.com/unistack-org/micro/v3/codec"
+	"go.unistack.org/micro/v3/codec"
-	"github.com/unistack-org/micro/v3/errors"
+	"go.unistack.org/micro/v3/errors"
-	"github.com/unistack-org/micro/v3/metadata"
+	"go.unistack.org/micro/v3/metadata"
 )
 
 // DefaultCodecs will be used to encode/decode data

client/options.go

@@ -5,20 +5,22 @@ import (
 	"crypto/tls"
 	"time"
 
-	"github.com/unistack-org/micro/v3/broker"
+	"go.unistack.org/micro/v3/broker"
-	"github.com/unistack-org/micro/v3/codec"
+	"go.unistack.org/micro/v3/codec"
-	"github.com/unistack-org/micro/v3/logger"
+	"go.unistack.org/micro/v3/logger"
-	"github.com/unistack-org/micro/v3/meter"
+	"go.unistack.org/micro/v3/meter"
-	"github.com/unistack-org/micro/v3/network/transport"
+	"go.unistack.org/micro/v3/network/transport"
-	"github.com/unistack-org/micro/v3/register"
+	"go.unistack.org/micro/v3/register"
-	"github.com/unistack-org/micro/v3/router"
+	"go.unistack.org/micro/v3/router"
-	"github.com/unistack-org/micro/v3/selector"
+	"go.unistack.org/micro/v3/selector"
-	"github.com/unistack-org/micro/v3/selector/random"
+	"go.unistack.org/micro/v3/selector/random"
-	"github.com/unistack-org/micro/v3/tracer"
+	"go.unistack.org/micro/v3/tracer"
 )
 
 // Options holds client options
 type Options struct {
+	// Transport used for transfer messages
+	Transport transport.Transport
 	// Selector used to select needed address
 	Selector selector.Selector
 	// Logger used to log messages
@@ -29,18 +31,16 @@ type Options struct {
 	Broker broker.Broker
 	// Meter used for metrics
 	Meter meter.Meter
-	// Router used to get route
-	Router router.Router
-	// Transport used for transfer messages
-	Transport transport.Transport
 	// Context is used for external options
 	Context context.Context
-	// Lookup func used to get destination addr
+	// Router used to get route
-	Lookup LookupFunc
+	Router router.Router
-	// Codecs map
-	Codecs map[string]codec.Codec
 	// 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
 	// Proxy is used for proxy requests
 	Proxy string
 	// ContentType is used to select codec
@@ -68,12 +68,12 @@ func NewCallOptions(opts ...CallOption) CallOptions {
 
 // CallOptions holds client call options
 type CallOptions struct {
-	// Router used for route
-	Router router.Router
 	// Selector selects addr
 	Selector selector.Selector
 	// Context used for deadline
 	Context context.Context
+	// Router used for route
+	Router router.Router
 	// Retry func used for retries
 	Retry RetryFunc
 	// Backoff func used for backoff when retry
@@ -82,22 +82,22 @@ type CallOptions struct {
 	Network string
 	// Content-Type
 	ContentType string
-	// CallWrappers call wrappers
+	// AuthToken string
-	CallWrappers []CallWrapper
+	AuthToken string
-	// SelectOptions selector options
-	SelectOptions []selector.SelectOption
 	// Address specifies static addr list
 	Address []string
-	// Retries specifies retries num
+	// SelectOptions selector options
-	Retries int
+	SelectOptions []selector.SelectOption
+	// CallWrappers call wrappers
+	CallWrappers []CallWrapper
 	// StreamTimeout stream timeout
 	StreamTimeout time.Duration
 	// RequestTimeout request timeout
 	RequestTimeout time.Duration
 	// DialTimeout dial timeout
 	DialTimeout time.Duration
-	// AuthToken string
+	// Retries specifies retries num
-	AuthToken string
+	Retries int
 }
 
 // Context pass context to client
@@ -118,12 +118,12 @@ func NewPublishOptions(opts ...PublishOption) PublishOptions {
 
 // PublishOptions holds publish options
 type PublishOptions struct {
-	// BodyOnly will publish only message body
-	BodyOnly bool
 	// Context used for external options
 	Context context.Context
 	// Exchange topic exchange name
 	Exchange string
+	// BodyOnly will publish only message body
+	BodyOnly bool
 }
 
 // NewMessageOptions creates message options struct
@@ -267,7 +267,7 @@ func Transport(t transport.Transport) Option {
 func Register(r register.Register) Option {
 	return func(o *Options) {
 		if o.Router != nil {
-			o.Router.Init(router.Register(r))
+			_ = o.Router.Init(router.Register(r))
 		}
 	}
 }
@@ -331,7 +331,7 @@ func TLSConfig(t *tls.Config) Option {
 		// already set. Required for Init call below.
 
 		// set the transport tls
-		o.Transport.Init(
+		_ = o.Transport.Init(
 			transport.TLSConfig(t),
 		)
 	}

client/retry.go

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

client/test_request.go

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

codec/codec.go

@@ -1,11 +1,11 @@
 // Package codec is an interface for encoding messages
-package codec
+package codec // import "go.unistack.org/micro/v3/codec"
 
 import (
 	"errors"
 	"io"
 
-	"github.com/unistack-org/micro/v3/metadata"
+	"go.unistack.org/micro/v3/metadata"
 )
 
 // Message types
@@ -25,7 +25,7 @@ var (
 
 var (
 	// DefaultMaxMsgSize specifies how much data codec can handle
-	DefaultMaxMsgSize int = 1024 * 1024 * 4 // 4Mb
+	DefaultMaxMsgSize = 1024 * 1024 * 4 // 4Mb
 	// DefaultCodec is the global default codec
 	DefaultCodec Codec = NewCodec()
 	// DefaultTagName specifies struct tag name to control codec Marshal/Unmarshal
@@ -58,7 +58,7 @@ type Message struct {
 	Method   string
 	Endpoint string
 	Error    string
-	Id       string
+	ID       string
 	Body     []byte
 	Type     MessageType
 }
@@ -67,3 +67,20 @@ type Message struct {
 func NewMessage(t MessageType) *Message {
 	return &Message{Type: t, Header: metadata.New(0)}
 }
+
+// MarshalAppend calls codec.Marshal(v) and returns the data appended to buf.
+// If codec implements MarshalAppend, that is called instead.
+func MarshalAppend(buf []byte, c Codec, v interface{}, opts ...Option) ([]byte, error) {
+	if nc, ok := c.(interface {
+		MarshalAppend([]byte, interface{}, ...Option) ([]byte, error)
+	}); ok {
+		return nc.MarshalAppend(buf, v, opts...)
+	}
+
+	mbuf, err := c.Marshal(v, opts...)
+	if err != nil {
+		return nil, err
+	}
+
+	return append(buf, mbuf...), nil
+}

codec/context.go

@@ -0,0 +1,34 @@
+package codec
+
+import (
+	"context"
+)
+
+type codecKey struct{}
+
+// FromContext returns codec from context
+func FromContext(ctx context.Context) (Codec, bool) {
+	if ctx == nil {
+		return nil, false
+	}
+	c, ok := ctx.Value(codecKey{}).(Codec)
+	return c, ok
+}
+
+// NewContext put codec in context
+func NewContext(ctx context.Context, c Codec) context.Context {
+	if ctx == nil {
+		ctx = context.Background()
+	}
+	return context.WithValue(ctx, codecKey{}, c)
+}
+
+// SetOption returns a function to setup a context with given value
+func SetOption(k, v interface{}) Option {
+	return func(o *Options) {
+		if o.Context == nil {
+			o.Context = context.Background()
+		}
+		o.Context = context.WithValue(o.Context, k, v)
+	}
+}

codec/frame.go

@@ -4,3 +4,31 @@ package codec
 type Frame struct {
 	Data []byte
 }
+
+func (m *Frame) MarshalJSON() ([]byte, error) {
+	return m.Data, nil
+}
+
+func (m *Frame) UnmarshalJSON(data []byte) error {
+	m.Data = data
+	return nil
+}
+
+func (m *Frame) ProtoMessage() {}
+
+func (m *Frame) Reset() {
+	*m = Frame{}
+}
+
+func (m *Frame) String() string {
+	return string(m.Data)
+}
+
+func (m *Frame) Marshal() ([]byte, error) {
+	return m.Data, nil
+}
+
+func (m *Frame) Unmarshal(data []byte) error {
+	m.Data = data
+	return nil
+}

codec/options.go

@@ -3,9 +3,9 @@ package codec
 import (
 	"context"
 
-	"github.com/unistack-org/micro/v3/logger"
+	"go.unistack.org/micro/v3/logger"
-	"github.com/unistack-org/micro/v3/meter"
+	"go.unistack.org/micro/v3/meter"
-	"github.com/unistack-org/micro/v3/tracer"
+	"go.unistack.org/micro/v3/tracer"
 )
 
 // Option func
@@ -19,12 +19,12 @@ type Options struct {
 	Logger logger.Logger
 	// Tracer used for tracing
 	Tracer tracer.Tracer
-	// MaxMsgSize specifies max messages size that reads by codec
-	MaxMsgSize int
-	// TagName specifies tag name in struct to control codec
-	TagName string
 	// Context stores additional codec options
 	Context context.Context
+	// TagName specifies tag name in struct to control codec
+	TagName string
+	// MaxMsgSize specifies max messages size that reads by codec
+	MaxMsgSize int
 }
 
 // MaxMsgSize sets the max message size

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"
@@ -13,7 +13,7 @@ var DefaultConfig Config = NewConfig()
 // DefaultWatcherMinInterval default min interval for poll changes
 var DefaultWatcherMinInterval = 5 * time.Second
 
-// DefaultWatcherMinInterval default max interval for poll changes
+// DefaultWatcherMaxInterval default max interval for poll changes
 var DefaultWatcherMaxInterval = 9 * time.Second
 
 var (
@@ -64,3 +64,53 @@ func Load(ctx context.Context, cs []Config, opts ...LoadOption) error {
 	}
 	return nil
 }
+
+var (
+	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 = 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 = func(ctx context.Context, c Config) error {
+		for _, fn := range c.Options().BeforeLoad {
+			if err := fn(ctx, c); err != nil {
+				c.Options().Logger.Errorf(ctx, "%s BeforeLoad err: %v", c.String(), err)
+				if !c.Options().AllowFail {
+					return err
+				}
+			}
+		}
+		return nil
+	}
+
+	DefaultBeforeSave = func(ctx context.Context, c Config) error {
+		for _, fn := range c.Options().BeforeSave {
+			if err := fn(ctx, c); err != nil {
+				c.Options().Logger.Errorf(ctx, "%s BeforeSavec err: %v", c.String(), err)
+				if !c.Options().AllowFail {
+					return err
+				}
+			}
+		}
+		return nil
+	}
+)

config/default.go

@@ -8,7 +8,7 @@ import (
 	"strings"
 
 	"github.com/imdario/mergo"
-	rutil "github.com/unistack-org/micro/v3/util/reflect"
+	rutil "go.unistack.org/micro/v3/util/reflect"
 )
 
 type defaultConfig struct {
@@ -27,10 +27,8 @@ func (c *defaultConfig) Init(opts ...Option) error {
 }
 
 func (c *defaultConfig) Load(ctx context.Context, opts ...LoadOption) error {
-	for _, fn := range c.opts.BeforeLoad {
+	if err := DefaultBeforeLoad(ctx, c); err != nil {
-		if err := fn(ctx, c); err != nil && !c.opts.AllowFail {
+		return err
-			return err
-		}
 	}
 
 	options := NewLoadOptions(opts...)
@@ -48,20 +46,26 @@ func (c *defaultConfig) Load(ctx context.Context, opts ...LoadOption) error {
 	}
 
 	src, err := rutil.Zero(dst)
-	if err == nil {
+	if err != nil {
-		if err = fillValues(reflect.ValueOf(src), c.opts.StructTag); err == nil {
+		if !c.opts.AllowFail {
-			err = mergo.Merge(dst, src, mopts...)
-		}
-	}
-
-	if err != nil && !c.opts.AllowFail {
-		return err
-	}
-
-	for _, fn := range c.opts.AfterLoad {
-		if err := fn(ctx, c); err != nil && !c.opts.AllowFail {
 			return err
 		}
+		return DefaultAfterLoad(ctx, c)
+	}
+
+	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 := DefaultAfterLoad(ctx, c); err != nil {
+		return err
 	}
 
 	return nil
@@ -247,16 +251,12 @@ func fillValues(valueOf reflect.Value, tname string) error {
 }
 
 func (c *defaultConfig) Save(ctx context.Context, opts ...SaveOption) error {
-	for _, fn := range c.opts.BeforeSave {
+	if err := DefaultBeforeSave(ctx, c); err != nil {
-		if err := fn(ctx, c); err != nil && !c.opts.AllowFail {
+		return err
-			return err
-		}
 	}
 
-	for _, fn := range c.opts.AfterSave {
+	if err := DefaultAfterSave(ctx, c); err != nil {
-		if err := fn(ctx, c); err != nil && !c.opts.AllowFail {
+		return err
-			return err
-		}
 	}
 
 	return nil

config/default_test.go

@@ -5,7 +5,7 @@ import (
 	"fmt"
 	"testing"
 
-	"github.com/unistack-org/micro/v3/config"
+	"go.unistack.org/micro/v3/config"
 )
 
 type Cfg struct {
@@ -48,5 +48,5 @@ func TestDefault(t *testing.T) {
 		t.Fatal("AfterLoad option not working")
 	}
 	_ = conf
-	//t.Logf("%#+v\n", conf)
+	// t.Logf("%#+v\n", conf)
 }

config/options.go

@@ -4,10 +4,10 @@ import (
 	"context"
 	"time"
 
-	"github.com/unistack-org/micro/v3/codec"
+	"go.unistack.org/micro/v3/codec"
-	"github.com/unistack-org/micro/v3/logger"
+	"go.unistack.org/micro/v3/logger"
-	"github.com/unistack-org/micro/v3/meter"
+	"go.unistack.org/micro/v3/meter"
-	"github.com/unistack-org/micro/v3/tracer"
+	"go.unistack.org/micro/v3/tracer"
 )
 
 // Options hold the config options
@@ -209,14 +209,14 @@ func Name(n string) Option {
 type WatchOptions struct {
 	// Context used by non default options
 	Context context.Context
-	// Coalesce multiple events to one
+	// Struct for filling
-	Coalesce bool
+	Struct interface{}
 	// MinInterval specifies the min time.Duration interval for poll changes
 	MinInterval time.Duration
 	// MaxInterval specifies the max time.Duration interval for poll changes
 	MaxInterval time.Duration
-	// Struct for filling
+	// Coalesce multiple events to one
-	Struct interface{}
+	Coalesce bool
 }
 
 type WatchOption func(*WatchOptions)

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
+package errors // import "go.unistack.org/micro/v3/errors"
 
 import (
 	"encoding/json"
@@ -37,8 +37,8 @@ var (
 
 // Error type
 type Error struct {
-	// Id holds error id or service, usually someting like my_service or id
+	// ID holds error id or service, usually someting like my_service or id
-	Id string
+	ID string
 	// Detail holds some useful details about error
 	Detail string
 	// Status usually holds text of http status
@@ -56,7 +56,7 @@ func (e *Error) Error() string {
 // New generates a custom error
 func New(id, detail string, code int32) error {
 	return &Error{
-		Id:     id,
+		ID:     id,
 		Code:   code,
 		Detail: detail,
 		Status: http.StatusText(int(code)),
@@ -77,7 +77,7 @@ func Parse(err string) *Error {
 // BadRequest generates a 400 error.
 func BadRequest(id, format string, a ...interface{}) error {
 	return &Error{
-		Id:     id,
+		ID:     id,
 		Code:   400,
 		Detail: fmt.Sprintf(format, a...),
 		Status: http.StatusText(400),
@@ -87,7 +87,7 @@ func BadRequest(id, format string, a ...interface{}) error {
 // Unauthorized generates a 401 error.
 func Unauthorized(id, format string, a ...interface{}) error {
 	return &Error{
-		Id:     id,
+		ID:     id,
 		Code:   401,
 		Detail: fmt.Sprintf(format, a...),
 		Status: http.StatusText(401),
@@ -97,7 +97,7 @@ func Unauthorized(id, format string, a ...interface{}) error {
 // Forbidden generates a 403 error.
 func Forbidden(id, format string, a ...interface{}) error {
 	return &Error{
-		Id:     id,
+		ID:     id,
 		Code:   403,
 		Detail: fmt.Sprintf(format, a...),
 		Status: http.StatusText(403),
@@ -107,7 +107,7 @@ func Forbidden(id, format string, a ...interface{}) error {
 // NotFound generates a 404 error.
 func NotFound(id, format string, a ...interface{}) error {
 	return &Error{
-		Id:     id,
+		ID:     id,
 		Code:   404,
 		Detail: fmt.Sprintf(format, a...),
 		Status: http.StatusText(404),
@@ -117,7 +117,7 @@ func NotFound(id, format string, a ...interface{}) error {
 // MethodNotAllowed generates a 405 error.
 func MethodNotAllowed(id, format string, a ...interface{}) error {
 	return &Error{
-		Id:     id,
+		ID:     id,
 		Code:   405,
 		Detail: fmt.Sprintf(format, a...),
 		Status: http.StatusText(405),
@@ -127,7 +127,7 @@ func MethodNotAllowed(id, format string, a ...interface{}) error {
 // Timeout generates a 408 error.
 func Timeout(id, format string, a ...interface{}) error {
 	return &Error{
-		Id:     id,
+		ID:     id,
 		Code:   408,
 		Detail: fmt.Sprintf(format, a...),
 		Status: http.StatusText(408),
@@ -137,7 +137,7 @@ func Timeout(id, format string, a ...interface{}) error {
 // Conflict generates a 409 error.
 func Conflict(id, format string, a ...interface{}) error {
 	return &Error{
-		Id:     id,
+		ID:     id,
 		Code:   409,
 		Detail: fmt.Sprintf(format, a...),
 		Status: http.StatusText(409),
@@ -147,7 +147,7 @@ func Conflict(id, format string, a ...interface{}) error {
 // InternalServerError generates a 500 error.
 func InternalServerError(id, format string, a ...interface{}) error {
 	return &Error{
-		Id:     id,
+		ID:     id,
 		Code:   500,
 		Detail: fmt.Sprintf(format, a...),
 		Status: http.StatusText(500),
@@ -157,7 +157,7 @@ func InternalServerError(id, format string, a ...interface{}) error {
 // NotImplemented generates a 501 error
 func NotImplemented(id, format string, a ...interface{}) error {
 	return &Error{
-		Id:     id,
+		ID:     id,
 		Code:   501,
 		Detail: fmt.Sprintf(format, a...),
 		Status: http.StatusText(501),
@@ -167,7 +167,7 @@ func NotImplemented(id, format string, a ...interface{}) error {
 // BadGateway generates a 502 error
 func BadGateway(id, format string, a ...interface{}) error {
 	return &Error{
-		Id:     id,
+		ID:     id,
 		Code:   502,
 		Detail: fmt.Sprintf(format, a...),
 		Status: http.StatusText(502),
@@ -177,7 +177,7 @@ func BadGateway(id, format string, a ...interface{}) error {
 // ServiceUnavailable generates a 503 error
 func ServiceUnavailable(id, format string, a ...interface{}) error {
 	return &Error{
-		Id:     id,
+		ID:     id,
 		Code:   503,
 		Detail: fmt.Sprintf(format, a...),
 		Status: http.StatusText(503),
@@ -187,7 +187,7 @@ func ServiceUnavailable(id, format string, a ...interface{}) error {
 // GatewayTimeout generates a 504 error
 func GatewayTimeout(id, format string, a ...interface{}) error {
 	return &Error{
-		Id:     id,
+		ID:     id,
 		Code:   504,
 		Detail: fmt.Sprintf(format, a...),
 		Status: http.StatusText(504),

errors/errors_test.go

@@ -9,12 +9,12 @@ import (
 func TestFromError(t *testing.T) {
 	err := NotFound("go.micro.test", "%s", "example")
 	merr := FromError(err)
-	if merr.Id != "go.micro.test" || merr.Code != 404 {
+	if merr.ID != "go.micro.test" || merr.Code != 404 {
 		t.Fatalf("invalid conversation %v != %v", err, merr)
 	}
 	err = er.New(err.Error())
 	merr = FromError(err)
-	if merr.Id != "go.micro.test" || merr.Code != 404 {
+	if merr.ID != "go.micro.test" || merr.Code != 404 {
 		t.Fatalf("invalid conversation %v != %v", err, merr)
 	}
 }
@@ -36,7 +36,7 @@ func TestEqual(t *testing.T) {
 func TestErrors(t *testing.T) {
 	testData := []*Error{
 		{
-			Id:     "test",
+			ID:     "test",
 			Code:   500,
 			Detail: "Internal server error",
 			Status: http.StatusText(500),
@@ -44,7 +44,7 @@ func TestErrors(t *testing.T) {
 	}
 
 	for _, e := range testData {
-		ne := New(e.Id, e.Detail, e.Code)
+		ne := New(e.ID, e.Detail, e.Code)
 
 		if e.Error() != ne.Error() {
 			t.Fatalf("Expected %s got %s", e.Error(), ne.Error())
@@ -56,8 +56,8 @@ func TestErrors(t *testing.T) {
 			t.Fatalf("Expected error got nil %v", pe)
 		}
 
-		if pe.Id != e.Id {
+		if pe.ID != e.ID {
-			t.Fatalf("Expected %s got %s", e.Id, pe.Id)
+			t.Fatalf("Expected %s got %s", e.ID, pe.ID)
 		}
 
 		if pe.Detail != e.Detail {

event.go

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

flow/default.go

@@ -7,12 +7,12 @@ import (
 	"sync"
 
 	"github.com/silas/dag"
-	"github.com/unistack-org/micro/v3/client"
+	"go.unistack.org/micro/v3/client"
-	"github.com/unistack-org/micro/v3/codec"
+	"go.unistack.org/micro/v3/codec"
-	"github.com/unistack-org/micro/v3/logger"
+	"go.unistack.org/micro/v3/logger"
-	"github.com/unistack-org/micro/v3/metadata"
+	"go.unistack.org/micro/v3/metadata"
-	"github.com/unistack-org/micro/v3/store"
+	"go.unistack.org/micro/v3/store"
-	"github.com/unistack-org/micro/v3/util/id"
+	"go.unistack.org/micro/v3/util/id"
 )
 
 type microFlow struct {
@@ -20,13 +20,13 @@ type microFlow struct {
 }
 
 type microWorkflow struct {
-	id   string
-	g    *dag.AcyclicGraph
-	init bool
-	sync.RWMutex
 	opts   Options
+	g      *dag.AcyclicGraph
 	steps  map[string]Step
+	id     string
 	status Status
+	sync.RWMutex
+	init bool
 }
 
 func (w *microWorkflow) ID() string {
@@ -241,6 +241,7 @@ func (w *microWorkflow) Execute(ctx context.Context, req *Message, opts ...Execu
 					w.opts.Logger.Tracef(nctx, "will be executed %v", steps[idx][nidx])
 				}
 				cstep := steps[idx][nidx]
+				// nolint: nestif
 				if len(cstep.Requires()) == 0 {
 					wg.Add(1)
 					go func(step Step) {
@@ -264,17 +265,16 @@ func (w *microWorkflow) Execute(ctx context.Context, req *Message, opts ...Execu
 							}
 							cherr <- serr
 							return
-						} else {
+						}
-							if werr := stepStore.Write(ctx, filepath.Join(step.ID(), "rsp"), rsp); werr != nil {
+						if werr := stepStore.Write(ctx, filepath.Join(step.ID(), "rsp"), rsp); werr != nil {
-								w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
+							w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
-								cherr <- werr
+							cherr <- werr
-								return
+							return
-							}
+						}
-							if werr := stepStore.Write(ctx, filepath.Join(step.ID(), "status"), &codec.Frame{Data: []byte(StatusSuccess.String())}); werr != nil {
+						if werr := stepStore.Write(ctx, filepath.Join(step.ID(), "status"), &codec.Frame{Data: []byte(StatusSuccess.String())}); werr != nil {
-								w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
+							w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
-								cherr <- werr
+							cherr <- werr
-								return
+							return
-							}
 						}
 					}(cstep)
 					wg.Wait()
@@ -298,16 +298,15 @@ func (w *microWorkflow) Execute(ctx context.Context, req *Message, opts ...Execu
 						}
 						cherr <- serr
 						return
-					} else {
+					}
-						if werr := stepStore.Write(ctx, filepath.Join(cstep.ID(), "rsp"), rsp); werr != nil {
+					if werr := stepStore.Write(ctx, filepath.Join(cstep.ID(), "rsp"), rsp); werr != nil {
-							w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
+						w.opts.Logger.Errorf(ctx, "store write error: %v", werr)
-							cherr <- werr
+						cherr <- werr
-							return
+						return
-						}
+					}
-						if werr := stepStore.Write(ctx, filepath.Join(cstep.ID(), "status"), &codec.Frame{Data: []byte(StatusSuccess.String())}); werr != nil {
+					if werr := stepStore.Write(ctx, filepath.Join(cstep.ID(), "status"), &codec.Frame{Data: []byte(StatusSuccess.String())}); werr != nil {
-							cherr <- werr
+						cherr <- werr
-							return
+						return
-						}
 					}
 				}
 			}
@@ -337,17 +336,14 @@ func (w *microWorkflow) Execute(ctx context.Context, req *Message, opts ...Execu
 		if werr := workflowStore.Write(w.opts.Context, "status", &codec.Frame{Data: []byte(StatusAborted.String())}); werr != nil {
 			w.opts.Logger.Errorf(w.opts.Context, "store error: %v", werr)
 		}
-		break
 	case err == nil:
 		if werr := workflowStore.Write(w.opts.Context, "status", &codec.Frame{Data: []byte(StatusSuccess.String())}); werr != nil {
 			w.opts.Logger.Errorf(w.opts.Context, "store error: %v", werr)
 		}
-		break
 	case err != nil:
 		if werr := workflowStore.Write(w.opts.Context, "status", &codec.Frame{Data: []byte(StatusFailure.String())}); werr != nil {
 			w.opts.Logger.Errorf(w.opts.Context, "store error: %v", werr)
 		}
-		break
 	}
 
 	return eid, err
@@ -429,11 +425,11 @@ func (f *microFlow) WorkflowLoad(ctx context.Context, id string) (Workflow, erro
 }
 
 type microCallStep struct {
-	opts    StepOptions
-	service string
-	method  string
 	rsp     *Message
 	req     *Message
+	service string
+	method  string
+	opts    StepOptions
 	status  Status
 }
 
@@ -499,10 +495,12 @@ func (s *microCallStep) Execute(ctx context.Context, req *Message, opts ...Execu
 	rsp := &codec.Frame{}
 	copts := []client.CallOption{client.WithRetries(0)}
 	if options.Timeout > 0 {
-		copts = append(copts, client.WithRequestTimeout(options.Timeout), client.WithDialTimeout(options.Timeout))
+		copts = append(copts,
+			client.WithRequestTimeout(options.Timeout),
+			client.WithDialTimeout(options.Timeout))
 	}
 	nctx := metadata.NewOutgoingContext(ctx, req.Header)
-	err := options.Client.Call(nctx, options.Client.NewRequest(s.service, s.method, &codec.Frame{Data: req.Body}), rsp)
+	err := options.Client.Call(nctx, options.Client.NewRequest(s.service, s.method, &codec.Frame{Data: req.Body}), rsp, copts...)
 	if err != nil {
 		return nil, err
 	}
@@ -511,10 +509,10 @@ func (s *microCallStep) Execute(ctx context.Context, req *Message, opts ...Execu
 }
 
 type microPublishStep struct {
-	opts   StepOptions
-	topic  string
 	req    *Message
 	rsp    *Message
+	topic  string
+	opts   StepOptions
 	status Status
 }
 
@@ -553,7 +551,7 @@ func (s *microPublishStep) String() string {
 	if s.opts.ID != "" {
 		return s.opts.ID
 	}
-	return fmt.Sprintf("%s", s.topic)
+	return s.topic
 }
 
 func (s *microPublishStep) Name() string {

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"
@@ -7,7 +7,7 @@ import (
 	"sync"
 	"sync/atomic"
 
-	"github.com/unistack-org/micro/v3/metadata"
+	"go.unistack.org/micro/v3/metadata"
 )
 
 var (

flow/options.go

@@ -4,11 +4,11 @@ import (
 	"context"
 	"time"
 
-	"github.com/unistack-org/micro/v3/client"
+	"go.unistack.org/micro/v3/client"
-	"github.com/unistack-org/micro/v3/logger"
+	"go.unistack.org/micro/v3/logger"
-	"github.com/unistack-org/micro/v3/meter"
+	"go.unistack.org/micro/v3/meter"
-	"github.com/unistack-org/micro/v3/store"
+	"go.unistack.org/micro/v3/store"
-	"github.com/unistack-org/micro/v3/tracer"
+	"go.unistack.org/micro/v3/tracer"
 )
 
 // Option func
@@ -96,8 +96,8 @@ type WorkflowOption func(*WorkflowOptions)
 
 // WorkflowOptions holds workflow options
 type WorkflowOptions struct {
-	ID      string
 	Context context.Context
+	ID      string
 }
 
 // WorkflowID set workflow id
@@ -120,10 +120,10 @@ type ExecuteOptions struct {
 	Context context.Context
 	// Start step
 	Start string
-	// Reverse execution
-	Reverse bool
 	// Timeout for execution
 	Timeout time.Duration
+	// Reverse execution
+	Reverse bool
 	// Async enables async execution
 	Async bool
 }
@@ -193,10 +193,10 @@ func NewExecuteOptions(opts ...ExecuteOption) ExecuteOptions {
 }
 
 type StepOptions struct {
-	ID       string
 	Context  context.Context
-	Requires []string
 	Fallback string
+	ID       string
+	Requires []string
 }
 
 type StepOption func(*StepOptions)

function.go

@@ -6,7 +6,7 @@ import (
 	"context"
 	"time"
 
-	"github.com/unistack-org/micro/v3/server"
+	"go.unistack.org/micro/v3/server"
 )
 
 // Function is a one time executing Service

function_test.go

@@ -8,7 +8,7 @@ import (
 	"sync"
 	"testing"
 
-	"github.com/unistack-org/micro/v3/register"
+	"go.unistack.org/micro/v3/register"
 )
 
 func TestFunction(t *testing.T) {

go.mod

@@ -1,13 +1,14 @@
-module github.com/unistack-org/micro/v3
+module go.unistack.org/micro/v3
 
 go 1.16
 
 require (
 	github.com/ef-ds/deque v1.0.4
-	github.com/golang-jwt/jwt/v4 v4.0.0
+	github.com/golang-jwt/jwt/v4 v4.1.0
 	github.com/imdario/mergo v0.3.12
 	github.com/patrickmn/go-cache v2.1.0+incompatible
-	github.com/silas/dag v0.0.0-20210121180416-41cf55125c34
+	github.com/silas/dag v0.0.0-20210626123444-3804bac2d6d4
 	github.com/unistack-org/micro-proto v0.0.9
-	golang.org/x/net v0.0.0-20210510120150-4163338589ed
+	golang.org/x/net v0.0.0-20210928044308-7d9f5e0b762b
+	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
 )

go.sum

@@ -2,6 +2,8 @@ github.com/ef-ds/deque v1.0.4 h1:iFAZNmveMT9WERAkqLJ+oaABF9AcVQ5AjXem/hroniI=
 github.com/ef-ds/deque v1.0.4/go.mod h1:gXDnTC3yqvBcHbq2lcExjtAcVrOnJCbMcZXmuj8Z4tg=
 github.com/golang-jwt/jwt/v4 v4.0.0 h1:RAqyYixv1p7uEnocuy8P1nru5wprCh/MH2BIlW5z5/o=
 github.com/golang-jwt/jwt/v4 v4.0.0/go.mod h1:/xlHOz8bRuivTWchD4jCa+NbatV+wEUSzwAxVc6locg=
+github.com/golang-jwt/jwt/v4 v4.1.0 h1:XUgk2Ex5veyVFVeLm0xhusUTQybEbexJXrvPNOKkSY0=
+github.com/golang-jwt/jwt/v4 v4.1.0/go.mod h1:/xlHOz8bRuivTWchD4jCa+NbatV+wEUSzwAxVc6locg=
 github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
 github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
@@ -11,17 +13,22 @@ github.com/patrickmn/go-cache v2.1.0+incompatible h1:HRMgzkcYKYpi3C8ajMPV8OFXaaR
 github.com/patrickmn/go-cache v2.1.0+incompatible/go.mod h1:3Qf8kWWT7OJRJbdiICTKqZju1ZixQ/KpMGzzAfe6+WQ=
 github.com/silas/dag v0.0.0-20210121180416-41cf55125c34 h1:vBfVmA5mZhsQa2jr1FOL9nfA37N/jnbBmi5XUfviVTI=
 github.com/silas/dag v0.0.0-20210121180416-41cf55125c34/go.mod h1:7RTUFBdIRC9nZ7/3RyRNH1bdqIShrDejd1YbLwgPS+I=
+github.com/silas/dag v0.0.0-20210626123444-3804bac2d6d4 h1:fOH64AB0C3ixGf9emky61STvPJL3smxJg+1Zwx1oCdg=
+github.com/silas/dag v0.0.0-20210626123444-3804bac2d6d4/go.mod h1:7RTUFBdIRC9nZ7/3RyRNH1bdqIShrDejd1YbLwgPS+I=
 github.com/unistack-org/micro-proto v0.0.9 h1:KrWLS4FUX7UAWNAilQf70uad6ZPf/0EudeddCXllRVc=
 github.com/unistack-org/micro-proto v0.0.9/go.mod h1:Cckwmzd89gvS7ThxzZp9kQR/EOdksFQcsTAtDDyKwrg=
-golang.org/x/net v0.0.0-20210510120150-4163338589ed h1:p9UgmWI9wKpfYmgaV/IZKGdXc5qEK45tDwwwDyjS26I=
+golang.org/x/net v0.0.0-20210805182204-aaa1db679c0d h1:20cMwl2fHAzkJMEA+8J4JgqBQcQGzbisXo31MIeenXI=
-golang.org/x/net v0.0.0-20210510120150-4163338589ed/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
+golang.org/x/net v0.0.0-20210805182204-aaa1db679c0d/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
+golang.org/x/net v0.0.0-20210928044308-7d9f5e0b762b h1:eB48h3HiRycXNy8E0Gf5e0hv7YT6Kt14L/D73G1fuwo=
+golang.org/x/net v0.0.0-20210928044308-7d9f5e0b762b/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
-golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
+golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
 google.golang.org/protobuf v1.27.1 h1:SnqbnDw1V7RiZcXPx5MEeqPv2s79L9i7BJUlG/+RurQ=
 google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=

logger/default.go

@@ -12,11 +12,11 @@ import (
 )
 
 type defaultLogger struct {
-	enc  *json.Encoder
+	enc      *json.Encoder
-	opts Options
-	sync.RWMutex
 	logFunc  LogFunc
 	logfFunc LogfFunc
+	opts     Options
+	sync.RWMutex
 }
 
 // Init(opts...) should only overwrite provided options
@@ -81,7 +81,7 @@ func (l *defaultLogger) Fields(fields ...interface{}) Logger {
 	} else if len(fields)%2 != 0 {
 		fields = fields[:len(fields)-1]
 	}
-	nl.opts.Fields = append(l.opts.Fields, fields...)
+	nl.opts.Fields = append(nl.opts.Fields, fields...)
 	return nl
 }
 

logger/logger.go

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

logger/options.go

@@ -19,12 +19,12 @@ type Options struct {
 	Fields []interface{}
 	// Name holds the logger name
 	Name string
-	// CallerSkipCount number of frmaes to skip
-	CallerSkipCount int
-	// The logging level the logger should log
-	Level Level
 	// Wrappers logger wrapper that called before actual Log/Logf function
 	Wrappers []Wrapper
+	// The logging level the logger should log
+	Level Level
+	// CallerSkipCount number of frmaes to skip
+	CallerSkipCount int
 }
 
 // NewOptions creates new options struct

logger/wrapper.go

@@ -1,10 +1,10 @@
-package logger
+package logger // import "go.unistack.org/micro/v3/logger/wrapper"
 
 import (
 	"context"
 	"reflect"
 
-	rutil "github.com/unistack-org/micro/v3/util/reflect"
+	rutil "go.unistack.org/micro/v3/util/reflect"
 )
 
 // LogFunc function used for Log method
@@ -125,23 +125,29 @@ func getArgs(args []interface{}) []interface{} {
 	var err error
 	for _, arg := range args {
 		val := reflect.ValueOf(arg)
-		switch val.Kind() {
+		if val.Kind() == reflect.Ptr {
-		case reflect.Ptr:
 			val = val.Elem()
 		}
 		narg := arg
-		if val.Kind() == reflect.Struct {
+		if val.Kind() != reflect.Struct {
-			if narg, err = rutil.Zero(arg); err == nil {
+			nargs = append(nargs, narg)
-				rutil.CopyDefaults(narg, arg)
+			continue
-				if flds, ferr := rutil.StructFields(narg); ferr == nil {
+		}
-					for _, fld := range flds {
+
-						if tv, ok := fld.Field.Tag.Lookup("logger"); ok && tv == "omit" {
+		if narg, err = rutil.Zero(arg); err != nil {
-							fld.Value.Set(reflect.Zero(fld.Value.Type()))
+			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

logger/wrapper/wrapper.go

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

metadata/metadata.go

@@ -1,5 +1,5 @@
 // Package metadata is a way of defining message headers
-package metadata
+package metadata // import "go.unistack.org/micro/v3/metadata"
 
 import (
 	"net/textproto"
@@ -107,13 +107,16 @@ func New(size int) Metadata {
 
 // Merge merges metadata to existing metadata, overwriting if specified
 func Merge(omd Metadata, mmd Metadata, overwrite bool) Metadata {
+	var ok bool
 	nmd := Copy(omd)
 	for key, val := range mmd {
-		if _, ok := nmd[key]; ok && !overwrite {
+		_, ok = nmd[key]
-			// skip
+		switch {
-		} else if val != "" {
+		case ok && !overwrite:
+			continue
+		case val != "":
 			nmd.Set(key, val)
-		} else {
+		case ok && val == "":
 			nmd.Del(key)
 		}
 	}

meter/generate.go

@@ -3,6 +3,10 @@ package meter
 //go:generate sh -c "protoc -I./handler -I../ -I$(go list -f '{{ .Dir }}' -m github.com/unistack-org/micro-proto) --go-micro_out='components=micro|http|server',standalone=false,debug=true,paths=source_relative:./handler handler/handler.proto"
 
 import (
+
+	// import required packages
 	_ "github.com/unistack-org/micro-proto/api"
+
+	// import required packages
 	_ "github.com/unistack-org/micro-proto/openapiv2"
 )

meter/handler/handler.go

@@ -1,12 +1,12 @@
-package handler
+package handler // import "go.unistack.org/micro/v3/meter/handler"
 
 import (
 	"bytes"
 	"context"
 
-	"github.com/unistack-org/micro/v3/codec"
+	"go.unistack.org/micro/v3/codec"
-	"github.com/unistack-org/micro/v3/errors"
+	"go.unistack.org/micro/v3/errors"
-	"github.com/unistack-org/micro/v3/meter"
+	"go.unistack.org/micro/v3/meter"
 )
 
 // guard to fail early

meter/handler/handler_micro.pb.go

@@ -6,8 +6,9 @@ package handler
 
 import (
 	context "context"
-	api "github.com/unistack-org/micro/v3/api"
+
-	codec "github.com/unistack-org/micro/v3/codec"
+	api "go.unistack.org/micro/v3/api"
+	codec "go.unistack.org/micro/v3/codec"
 )
 
 var (

meter/handler/handler_micro_http.pb.go

@@ -6,9 +6,10 @@ package handler
 
 import (
 	context "context"
-	api "github.com/unistack-org/micro/v3/api"
+
-	codec "github.com/unistack-org/micro/v3/codec"
+	api "go.unistack.org/micro/v3/api"
-	server "github.com/unistack-org/micro/v3/server"
+	codec "go.unistack.org/micro/v3/codec"
+	server "go.unistack.org/micro/v3/server"
 )
 
 type meterServer struct {

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"
@@ -28,17 +28,31 @@ var (
 
 // Meter is an interface for collecting and instrumenting metrics
 type Meter interface {
+	// Name returns meter name
 	Name() string
+	// Init initialize meter
 	Init(opts ...Option) error
+	// Clone create meter copy with new options
+	Clone(opts ...Option) Meter
+	// Counter get or create counter
 	Counter(name string, labels ...string) Counter
+	// FloatCounter get or create float counter
 	FloatCounter(name string, labels ...string) FloatCounter
+	// Gauge get or create gauge
 	Gauge(name string, fn func() float64, labels ...string) Gauge
+	// Set create new meter metrics set
 	Set(opts ...Option) Meter
+	// Histogram get or create histogram
 	Histogram(name string, labels ...string) Histogram
+	// Summary get or create summary
 	Summary(name string, labels ...string) Summary
+	// SummaryExt get or create summary with spcified quantiles and window time
 	SummaryExt(name string, window time.Duration, quantiles []float64, labels ...string) Summary
+	// Write writes metrics to io.Writer
 	Write(w io.Writer, opts ...Option) error
+	// Options returns meter options
 	Options() Options
+	// String return meter type
 	String() string
 }
 

meter/meter_test.go

@@ -33,7 +33,7 @@ func TestBuildLabels(t *testing.T) {
 	}
 
 	data := []testData{
-		testData{
+		{
 			src: []string{"zerolabel", "value3", "firstlabel", "value2"},
 			dst: []string{"firstlabel", "value2", "zerolabel", "value3"},
 		},
@@ -48,15 +48,15 @@ func TestBuildLabels(t *testing.T) {
 
 func TestBuildName(t *testing.T) {
 	data := map[string][]string{
-		`my_metric{firstlabel="value2",zerolabel="value3"}`: []string{
+		`my_metric{firstlabel="value2",zerolabel="value3"}`: {
 			"my_metric",
 			"zerolabel", "value3", "firstlabel", "value2",
 		},
-		`my_metric{broker="broker2",register="mdns",server="tcp"}`: []string{
+		`my_metric{broker="broker2",register="mdns",server="tcp"}`: {
 			"my_metric",
 			"broker", "broker1", "broker", "broker2", "server", "http", "server", "tcp", "register", "mdns",
 		},
-		`my_metric{aaa="aaa"}`: []string{
+		`my_metric{aaa="aaa"}`: {
 			"my_metric",
 			"aaa", "aaa",
 		},

meter/noop.go

@@ -15,6 +15,15 @@ func NewMeter(opts ...Option) Meter {
 	return &noopMeter{opts: NewOptions(opts...)}
 }
 
+// Clone return old meter with new options
+func (r *noopMeter) Clone(opts ...Option) Meter {
+	options := r.opts
+	for _, o := range opts {
+		o(&options)
+	}
+	return &noopMeter{opts: options}
+}
+
 func (r *noopMeter) Name() string {
 	return r.opts.Name
 }

meter/options.go

@@ -3,7 +3,7 @@ package meter
 import (
 	"context"
 
-	"github.com/unistack-org/micro/v3/logger"
+	"go.unistack.org/micro/v3/logger"
 )
 
 // Option powers the configuration for metrics implementations:
@@ -51,6 +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) {

meter/wrapper/wrapper.go

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

micro.go

@@ -0,0 +1 @@
+package micro // import "go.unistack.org/micro/v3"

model/model.go

@@ -1,35 +0,0 @@
-// +build ignore
-
-// Package model is an interface for data modelling
-package model
-
-// Model provides an interface for data modelling
-type Model interface {
-	// Initialise options
-	Init(...Option) error
-	// NewEntity creates a new entity to store or access
-	NewEntity(name string, value interface{}) Entity
-	// Create a value
-	Create(Entity) error
-	// Read values
-	Read(...ReadOption) ([]Entity, error)
-	// Update the value
-	Update(Entity) error
-	// Delete an entity
-	Delete(...DeleteOption) error
-	// Implementation of the model
-	String() string
-}
-
-type Entity interface {
-	// Unique id of the entity
-	Id() string
-	// Name of the entity
-	Name() string
-	// The value associated with the entity
-	Value() interface{}
-	// Attributes of the entity
-	Attributes() map[string]interface{}
-	// Read a value as a concrete type
-	Read(v interface{}) error
-}

model/options.go

@@ -1,41 +0,0 @@
-// +build ignore
-
-// Package model is an interface for data modelling
-package model
-
-import (
-	"github.com/unistack-org/micro/v3/codec"
-	"github.com/unistack-org/micro/v3/logger"
-	"github.com/unistack-org/micro/v3/store"
-	"github.com/unistack-org/micro/v3/sync"
-)
-
-type Options struct {
-	// Database to write to
-	Database string
-	// for serialising
-	Codec codec.Codec
-	// for locking
-	Sync sync.Sync
-	// for storage
-	Store store.Store
-	// for logger
-	Logger logger.Logger
-}
-
-type Option func(o *Options)
-
-// Logger sets the logger
-func Logger(l logger.Logger) Option {
-	return func(o *Options) {
-		o.Logger = l
-	}
-}
-
-type ReadOptions struct{}
-
-type ReadOption func(o *ReadOptions)
-
-type DeleteOptions struct{}
-
-type DeleteOption func(o *DeleteOptions)

network/network.go

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

network/options.go

@@ -1,13 +1,13 @@
 package network
 
 import (
-	"github.com/unistack-org/micro/v3/logger"
+	"go.unistack.org/micro/v3/logger"
-	"github.com/unistack-org/micro/v3/meter"
+	"go.unistack.org/micro/v3/meter"
-	"github.com/unistack-org/micro/v3/network/tunnel"
+	"go.unistack.org/micro/v3/network/tunnel"
-	"github.com/unistack-org/micro/v3/proxy"
+	"go.unistack.org/micro/v3/proxy"
-	"github.com/unistack-org/micro/v3/router"
+	"go.unistack.org/micro/v3/router"
-	"github.com/unistack-org/micro/v3/tracer"
+	"go.unistack.org/micro/v3/tracer"
-	"github.com/unistack-org/micro/v3/util/id"
+	"go.unistack.org/micro/v3/util/id"
 )
 
 // Option func
@@ -27,8 +27,8 @@ type Options struct {
 	Tracer tracer.Tracer
 	// Tunnel used for transfer data
 	Tunnel tunnel.Tunnel
-	// Id of the node
+	// ID of the node
-	Id string
+	ID string
 	// Name of the network
 	Name string
 	// Address to bind to
@@ -39,10 +39,10 @@ type Options struct {
 	Nodes []string
 }
 
-// Id sets the id of the network node
+// ID sets the id of the network node
-func Id(id string) Option {
+func ID(id string) Option {
 	return func(o *Options) {
-		o.Id = id
+		o.ID = id
 	}
 }
 
@@ -119,7 +119,7 @@ func Tracer(t tracer.Tracer) Option {
 // NewOptions returns network default options
 func NewOptions(opts ...Option) Options {
 	options := Options{
-		Id:      id.Must(),
+		ID:      id.Must(),
 		Name:    "go.micro",
 		Address: ":0",
 		Logger:  logger.DefaultLogger,

network/transport/memory.go

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

network/transport/memory_test.go

@@ -16,12 +16,14 @@ func TestMemoryTransport(t *testing.T) {
 	}
 	defer l.Close()
 
+	cherr := make(chan error, 1)
 	// accept
 	go func() {
-		if err := l.Accept(func(sock Socket) {
+		if nerr := l.Accept(func(sock Socket) {
 			for {
 				var m Message
-				if err := sock.Recv(&m); err != nil {
+				if rerr := sock.Recv(&m); rerr != nil {
+					cherr <- rerr
 					return
 				}
 				if len(os.Getenv("INTEGRATION_TESTS")) == 0 {
@@ -30,11 +32,12 @@ func TestMemoryTransport(t *testing.T) {
 				if cerr := sock.Send(&Message{
 					Body: []byte(`pong`),
 				}); cerr != nil {
+					cherr <- cerr
 					return
 				}
 			}
-		}); err != nil {
+		}); nerr != nil {
-			t.Fatalf("Unexpected error accepting %v", err)
+			cherr <- err
 		}
 	}()
 
@@ -45,19 +48,24 @@ func TestMemoryTransport(t *testing.T) {
 	}
 	defer c.Close()
 
-	// send <=> receive
+	select {
-	for i := 0; i < 3; i++ {
+	case err := <-cherr:
-		if err := c.Send(&Message{
+		t.Fatal(err)
-			Body: []byte(`ping`),
+	default:
-		}); err != nil {
+		// send <=> receive
-			return
+		for i := 0; i < 3; i++ {
-		}
+			if err := c.Send(&Message{
-		var m Message
+				Body: []byte(`ping`),
-		if err := c.Recv(&m); err != nil {
+			}); err != nil {
-			return
+				return
-		}
+			}
-		if len(os.Getenv("INTEGRATION_TESTS")) == 0 {
+			var m Message
-			t.Logf("Client Received %s", string(m.Body))
+			if err := c.Recv(&m); err != nil {
+				return
+			}
+			if len(os.Getenv("INTEGRATION_TESTS")) == 0 {
+				t.Logf("Client Received %s", string(m.Body))
+			}
 		}
 	}
 }

network/transport/options.go

@@ -5,10 +5,10 @@ import (
 	"crypto/tls"
 	"time"
 
-	"github.com/unistack-org/micro/v3/codec"
+	"go.unistack.org/micro/v3/codec"
-	"github.com/unistack-org/micro/v3/logger"
+	"go.unistack.org/micro/v3/logger"
-	"github.com/unistack-org/micro/v3/meter"
+	"go.unistack.org/micro/v3/meter"
-	"github.com/unistack-org/micro/v3/tracer"
+	"go.unistack.org/micro/v3/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
+package transport // import "go.unistack.org/micro/v3/network/transport"
 
 import (
 	"context"
 	"time"
 
-	"github.com/unistack-org/micro/v3/metadata"
+	"go.unistack.org/micro/v3/metadata"
 )
 
 var (

network/tunnel/broker/broker.go

@@ -1,15 +1,15 @@
 // Package broker is a tunnel broker
-package broker
+package broker // import "go.unistack.org/micro/v3/network/tunnel/broker"
 
 import (
 	"context"
 	"fmt"
 
-	"github.com/unistack-org/micro/v3/broker"
+	"go.unistack.org/micro/v3/broker"
-	"github.com/unistack-org/micro/v3/logger"
+	"go.unistack.org/micro/v3/logger"
-	"github.com/unistack-org/micro/v3/metadata"
+	"go.unistack.org/micro/v3/metadata"
-	"github.com/unistack-org/micro/v3/network/transport"
+	"go.unistack.org/micro/v3/network/transport"
-	"github.com/unistack-org/micro/v3/network/tunnel"
+	"go.unistack.org/micro/v3/network/tunnel"
 )
 
 type tunBroker struct {
@@ -34,9 +34,9 @@ type tunBatchSubscriber struct {
 }
 
 type tunEvent struct {
+	err     error
 	message *broker.Message
 	topic   string
-	err     error
 }
 
 // used to access tunnel from options context
@@ -82,7 +82,7 @@ func (t *tunBroker) BatchPublish(ctx context.Context, msgs []*broker.Message, op
 		topic, _ := msg.Header.Get(metadata.HeaderTopic)
 		c, ok := topicMap[topic]
 		if !ok {
-			c, err := t.tunnel.Dial(ctx, topic, tunnel.DialMode(tunnel.Multicast))
+			c, err = t.tunnel.Dial(ctx, topic, tunnel.DialMode(tunnel.Multicast))
 			if err != nil {
 				return err
 			}
@@ -199,7 +199,9 @@ func (t *tunBatchSubscriber) run() {
 			},
 		}}
 		// handle the message
-		go t.handler(evts)
+		go func() {
+			_ = t.handler(evts)
+		}()
 
 	}
 }
@@ -235,13 +237,15 @@ func (t *tunSubscriber) run() {
 		c.Close()
 
 		// handle the message
-		go t.handler(&tunEvent{
+		go func() {
-			topic: t.topic,
+			_ = t.handler(&tunEvent{
-			message: &broker.Message{
+				topic: t.topic,
-				Header: m.Header,
+				message: &broker.Message{
-				Body:   m.Body,
+					Header: m.Header,
-			},
+					Body:   m.Body,
-		})
+				},
+			})
+		}()
 	}
 }
 

network/tunnel/options.go

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

network/tunnel/transport/listener.go

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

network/tunnel/transport/transport.go

@@ -1,12 +1,12 @@
 // Package transport provides a tunnel transport
-package transport
+package transport // import "go.unistack.org/micro/v3/network/tunnel/transport"
 
 import (
 	"context"
 	"fmt"
 
-	"github.com/unistack-org/micro/v3/network/transport"
+	"go.unistack.org/micro/v3/network/transport"
-	"github.com/unistack-org/micro/v3/network/tunnel"
+	"go.unistack.org/micro/v3/network/tunnel"
 )
 
 type tunTransport struct {
@@ -37,7 +37,7 @@ func (t *tunTransport) Init(opts ...transport.Option) error {
 	// get the transport
 	tr, ok := t.options.Context.Value(transportKey{}).(transport.Transport)
 	if ok {
-		tun.Init(tunnel.Transport(tr))
+		_ = tun.Init(tunnel.Transport(tr))
 	}
 
 	// set the tunnel

network/tunnel/tunnel.go

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

options.go

@@ -5,18 +5,18 @@ import (
 	"fmt"
 	"time"
 
-	"github.com/unistack-org/micro/v3/auth"
+	"go.unistack.org/micro/v3/auth"
-	"github.com/unistack-org/micro/v3/broker"
+	"go.unistack.org/micro/v3/broker"
-	"github.com/unistack-org/micro/v3/client"
+	"go.unistack.org/micro/v3/client"
-	"github.com/unistack-org/micro/v3/config"
+	"go.unistack.org/micro/v3/config"
-	"github.com/unistack-org/micro/v3/logger"
+	"go.unistack.org/micro/v3/logger"
-	"github.com/unistack-org/micro/v3/metadata"
+	"go.unistack.org/micro/v3/metadata"
-	"github.com/unistack-org/micro/v3/meter"
+	"go.unistack.org/micro/v3/meter"
-	"github.com/unistack-org/micro/v3/register"
+	"go.unistack.org/micro/v3/register"
-	"github.com/unistack-org/micro/v3/router"
+	"go.unistack.org/micro/v3/router"
-	"github.com/unistack-org/micro/v3/server"
+	"go.unistack.org/micro/v3/server"
-	"github.com/unistack-org/micro/v3/store"
+	"go.unistack.org/micro/v3/store"
-	"github.com/unistack-org/micro/v3/tracer"
+	"go.unistack.org/micro/v3/tracer"
 )
 
 // Options for micro service

profiler/http/http.go

@@ -1,5 +1,5 @@
 // Package http enables the http profiler
-package http
+package http // import "go.unistack.org/micro/v3/profiler/http"
 
 import (
 	"context"
@@ -7,7 +7,7 @@ import (
 	"net/http/pprof"
 	"sync"
 
-	profile "github.com/unistack-org/micro/v3/profiler"
+	profile "go.unistack.org/micro/v3/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
+package pprof // import "go.unistack.org/micro/v3/profiler/pprof"
 
 import (
 	"os"
@@ -9,7 +9,7 @@ import (
 	"sync"
 	"time"
 
-	profile "github.com/unistack-org/micro/v3/profiler"
+	profile "go.unistack.org/micro/v3/profiler"
 )
 
 type profiler struct {
@@ -31,7 +31,7 @@ func (p *profiler) writeHeap(f *os.File) {
 		select {
 		case <-t.C:
 			runtime.GC()
-			pprof.WriteHeapProfile(f)
+			_ = pprof.WriteHeapProfile(f)
 		case <-p.exit:
 			return
 		}

profiler/profile.go

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

proxy/options.go

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

proxy/proxy.go

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

register/extractor.go

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

register/memory.go

@@ -6,8 +6,8 @@ import (
 	"sync"
 	"time"
 
-	"github.com/unistack-org/micro/v3/logger"
+	"go.unistack.org/micro/v3/logger"
-	"github.com/unistack-org/micro/v3/util/id"
+	"go.unistack.org/micro/v3/util/id"
 )
 
 var (

register/options.go

@@ -5,9 +5,9 @@ import (
 	"crypto/tls"
 	"time"
 
-	"github.com/unistack-org/micro/v3/logger"
+	"go.unistack.org/micro/v3/logger"
-	"github.com/unistack-org/micro/v3/meter"
+	"go.unistack.org/micro/v3/meter"
-	"github.com/unistack-org/micro/v3/tracer"
+	"go.unistack.org/micro/v3/tracer"
 )
 
 // Options holds options for register
@@ -44,7 +44,7 @@ func NewOptions(opts ...Option) Options {
 	return options
 }
 
-// nolint: golint
+// nolint: golint,revive
 // RegisterOptions holds options for register method
 type RegisterOptions struct {
 	Context  context.Context
@@ -197,7 +197,7 @@ func TLSConfig(t *tls.Config) Option {
 	}
 }
 
-// nolint: golint
+// nolint: golint,revive
 // RegisterAttempts specifies register atempts count
 func RegisterAttempts(t int) RegisterOption {
 	return func(o *RegisterOptions) {
@@ -205,7 +205,7 @@ func RegisterAttempts(t int) RegisterOption {
 	}
 }
 
-// nolint: golint
+// nolint: golint,revive
 // RegisterTTL specifies register ttl
 func RegisterTTL(t time.Duration) RegisterOption {
 	return func(o *RegisterOptions) {
@@ -213,7 +213,7 @@ func RegisterTTL(t time.Duration) RegisterOption {
 	}
 }
 
-// nolint: golint
+// nolint: golint,revive
 // RegisterContext sets the register context
 func RegisterContext(ctx context.Context) RegisterOption {
 	return func(o *RegisterOptions) {
@@ -221,7 +221,7 @@ func RegisterContext(ctx context.Context) RegisterOption {
 	}
 }
 
-// nolint: golint
+// nolint: golint,revive
 // RegisterDomain secifies register domain
 func RegisterDomain(d string) RegisterOption {
 	return func(o *RegisterOptions) {

register/register.go

@@ -1,11 +1,11 @@
 // Package register is an interface for service discovery
-package register
+package register // import "go.unistack.org/micro/v3/register"
 
 import (
 	"context"
 	"errors"
 
-	"github.com/unistack-org/micro/v3/metadata"
+	"go.unistack.org/micro/v3/metadata"
 )
 
 const (
@@ -68,8 +68,8 @@ type Endpoint struct {
 // Option func signature
 type Option func(*Options)
 
+// nolint: golint,revive
 // RegisterOption option is used to register service
-// nolint: golint
 type RegisterOption func(*RegisterOptions)
 
 // WatchOption option is used to watch service changes

resolver/dns/dns.go

@@ -1,5 +1,5 @@
 // Package dns resolves names to dns records
-package dns
+package dns // import "go.unistack.org/micro/v3/resolver/dns"
 
 import (
 	"context"
@@ -7,7 +7,7 @@ import (
 	"sync"
 	"time"
 
-	"github.com/unistack-org/micro/v3/resolver"
+	"go.unistack.org/micro/v3/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
+package dnssrv // import "go.unistack.org/micro/v3/resolver/dnssrv"
 
 import (
 	"fmt"
 	"net"
 
-	"github.com/unistack-org/micro/v3/resolver"
+	"go.unistack.org/micro/v3/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
+package http // import "go.unistack.org/micro/v3/resolver/http"
 
 import (
 	"encoding/json"
@@ -8,9 +8,10 @@ import (
 	"net/http"
 	"net/url"
 
-	"github.com/unistack-org/micro/v3/resolver"
+	"go.unistack.org/micro/v3/resolver"
 )
 
+// nolint: golint,revive
 // HTTPResolver is a HTTP network resolver
 type HTTPResolver struct {
 	// Proto if not set, defaults to http
@@ -53,6 +54,7 @@ func (r *HTTPResolver) Resolve(name string) ([]*resolver.Record, error) {
 	q.Set("name", name)
 	uri.RawQuery = q.Encode()
 
+	// nolint: noctx
 	rsp, err := http.Get(uri.String())
 	if err != nil {
 		return nil, err

resolver/noop/noop.go

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

resolver/registry/registry.go

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

resolver/resolver.go

@@ -1,5 +1,5 @@
 // Package resolver resolves network names to addresses
-package resolver
+package resolver // import "go.unistack.org/micro/v3/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
+package static // import "go.unistack.org/micro/v3/resolver/static"
 
 import (
-	"github.com/unistack-org/micro/v3/resolver"
+	"go.unistack.org/micro/v3/resolver"
 )
 
 // Resolver returns a static list of nodes. In the event the node list

router/dns.go

@@ -40,8 +40,9 @@ func (d *dns) Lookup(opts ...QueryOption) ([]Route, error) {
 	// check to see if we have the port provided in the service, e.g. go-micro-srv-foo:8000
 	host, port, err := net.SplitHostPort(options.Service)
 	if err == nil {
+		var ips []string
 		// lookup the service using A records
-		ips, err := net.LookupHost(host)
+		ips, err = net.LookupHost(host)
 		if err != nil {
 			return nil, err
 		}

router/options.go

@@ -3,9 +3,9 @@ package router
 import (
 	"context"
 
-	"github.com/unistack-org/micro/v3/logger"
+	"go.unistack.org/micro/v3/logger"
-	"github.com/unistack-org/micro/v3/register"
+	"go.unistack.org/micro/v3/register"
-	"github.com/unistack-org/micro/v3/util/id"
+	"go.unistack.org/micro/v3/util/id"
 )
 
 // Options are router options
@@ -16,15 +16,15 @@ type Options struct {
 	Name     string
 	Gateway  string
 	Network  string
-	Id       string
+	ID       string
 	Address  string
 	Precache bool
 }
 
-// Id sets Router Id
+// ID sets Router Id
-func Id(id string) Option {
+func ID(id string) Option {
 	return func(o *Options) {
-		o.Id = id
+		o.ID = id
 	}
 }
 
@@ -80,7 +80,7 @@ func Name(n string) Option {
 // NewOptions returns router default options
 func NewOptions(opts ...Option) Options {
 	options := Options{
-		Id:       id.Must(),
+		ID:       id.Must(),
 		Network:  DefaultNetwork,
 		Register: register.DefaultRegister,
 		Logger:   logger.DefaultLogger,

router/route.go

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

router/router.go

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

router/watcher.go

@@ -38,8 +38,8 @@ func (t EventType) String() string {
 type Event struct {
 	// Timestamp is event timestamp
 	Timestamp time.Time
-	// Id of the event
+	// ID of the event
-	Id string
+	ID string
 	// Route is table route
 	Route Route
 	// Type defines type of event

runtime/options.go

@@ -4,8 +4,8 @@ import (
 	"context"
 	"io"
 
-	"github.com/unistack-org/micro/v3/client"
+	"go.unistack.org/micro/v3/client"
-	"github.com/unistack-org/micro/v3/logger"
+	"go.unistack.org/micro/v3/logger"
 )
 
 // Options configure runtime