Update workflows (#135)

- Rename workflows
- pr -> job_lint
- build -> job_test
- update golangci

Co-authored-by: Aleksandr Tolstikhin <atolstikhin@mtsbank.ru>
Reviewed-on: #135
Co-authored-by: Александр Толстихин <tolstihin1996@mail.ru>
Co-committed-by: Александр Толстихин <tolstihin1996@mail.ru>

.gitea/ISSUE_TEMPLATE/bug_report.md

@@ -1,6 +1,6 @@
 ---
 name: Bug report
-about: For reporting bugs in micro
+about: For reporting bugs in go-micro
 title: "[BUG]"
 labels: ''
 assignees: ''
@@ -16,3 +16,9 @@ assignees: ''
 **How to reproduce the bug:**
 
 If possible, please include a minimal code snippet here.
+
+**Environment:**
+Go Version: please paste `go version` output here
+```
+please paste `go env` output here
+```

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

@@ -1,6 +1,6 @@
 ---
 name: Feature request / Enhancement
-about: If you have a need not served by micro
+about: If you have a need not served by go-micro
 title: "[FEATURE]"
 labels: ''
 assignees: ''

.gitea/ISSUE_TEMPLATE/question.md

@@ -0,0 +1,14 @@
+---
+name: Question
+about: Ask a question about go-micro
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+Before asking, please check if your question has already been answered: 
+
+1. Check the documentation - https://micro.mu/docs/
+2. Check the examples and plugins - https://github.com/micro/examples & https://github.com/micro/go-plugins
+3. Search existing issues

.gitea/workflows/job_lint.yml

@@ -3,10 +3,10 @@ name: lint
 on:
   pull_request:
     types: [opened, reopened, synchronize]
-    branches: [ master, v3, v4 ]
+    branches:
-    paths-ignore:
+    - master
-      - '.github/**'
+    - v3
-      - '.gitea/**'
+    - v4
 
 jobs:
   lint:
@@ -24,6 +24,6 @@ jobs:
     - name: setup deps
       run: go get -v ./...
     - name: run lint
-      uses: golangci/golangci-lint-action@v6
+      uses: https://github.com/golangci/golangci-lint-action@v6
       with:
         version: 'latest'

.gitea/workflows/job_test.yml

@@ -3,12 +3,15 @@ name: test
 on:
   pull_request:
     types: [opened, reopened, synchronize]
-    branches: [ master, v3, v4 ]
+    branches:
+    - master
+    - v3
+    - v4
   push:
-    branches: [ master, v3, v4 ]
+    branches:
-    paths-ignore:
+    - master
-      - '.github/**'
+    - v3
-      - '.gitea/**'
+    - v4
 
 jobs:
   test:

.gitea/workflows/job_tests.yml

@@ -3,12 +3,15 @@ name: test
 on:
   pull_request:
     types: [opened, reopened, synchronize]
-    branches: [ master, v3, v4 ]
+    branches:
+    - master
+    - v3
+    - v4
   push:
-    branches: [ master, v3, v4 ]
+    branches:
-    paths-ignore:
+    - master
-      - '.github/**'
+    - v3
-      - '.gitea/**'
+    - v4
 
 jobs:
   test:
@@ -32,19 +35,19 @@ jobs:
         go-version: 'stable'
     - name: setup go work
       env:
-        GOWORK: ${{ github.workspace }}/go.work
+        GOWORK: /workspace/${{ github.repository_owner }}/go.work
       run: |
         go work init
         go work use .
         go work use micro-tests        
     - name: setup deps
       env:
-        GOWORK: ${{ github.workspace }}/go.work
+        GOWORK: /workspace/${{ github.repository_owner }}/go.work
       run: go get -v ./...
     - name: run tests
       env:
         INTEGRATION_TESTS: yes
-        GOWORK: ${{ github.workspace }}/go.work
+        GOWORK: /workspace/${{ github.repository_owner }}/go.work
       run: |
         cd micro-tests
         go test -mod readonly -v ./... || true        

.github/ISSUE_TEMPLATE/question.md

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

.github/autoapprove.yml

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

.github/workflows/job_coverage.yml

@@ -1,53 +0,0 @@
-name: coverage
-
-on:
-  push:
-    branches: [ main, v3, v4 ]
-    paths-ignore:
-      - '.github/**'
-      - '.gitea/**'
-  pull_request:
-    branches: [ main, v3, v4 ]
-
-jobs:
-
-  build:
-    if: github.server_url != 'https://github.com'
-    runs-on: ubuntu-latest
-    steps:
-    - name: checkout code
-      uses: actions/checkout@v4
-      with:
-        filter: 'blob:none'
-
-    - name: setup go
-      uses: actions/setup-go@v5
-      with:
-        cache-dependency-path: "**/*.sum"
-        go-version: 'stable'
-
-    - name: test coverage
-      run: |
-        go test -v -cover ./... -covermode=count -coverprofile coverage.out -coverpkg ./...
-        go tool cover -func coverage.out -o coverage.out
-
-    - name: coverage badge
-      uses: tj-actions/coverage-badge-go@v2
-      with:
-        green: 80
-        filename: coverage.out
-
-    - uses: stefanzweifel/git-auto-commit-action@v4
-      name: autocommit
-      with:
-        commit_message: Apply Code Coverage Badge
-        skip_fetch: false
-        skip_checkout: false
-        file_pattern: ./README.md
-
-    - name: push
-      if: steps.auto-commit-action.outputs.changes_detected == 'true'
-      uses: ad-m/github-push-action@master
-      with:
-        github_token: ${{ github.token }}
-        branch: ${{ github.ref }}

.github/workflows/job_sync.yml

@@ -1,94 +0,0 @@
-name: sync
-
-on:
-  schedule:
-    - cron: '*/5 * * * *'
-  # Allows you to run this workflow manually from the Actions tab
-  workflow_dispatch:
-
-jobs:
-  sync:
-    if: github.server_url != 'https://github.com'
-    runs-on: ubuntu-latest
-    steps:
-    - name: init
-      run: |
-        git config --global user.email "vtolstov <vtolstov@users.noreply.github.com>"
-        git config --global user.name "github-actions[bot]"
-        echo "machine git.unistack.org login vtolstov password ${{ secrets.TOKEN_GITEA }}" >> /root/.netrc
-        echo "machine github.com login vtolstov password ${{ secrets.TOKEN_GITHUB }}" >> /root/.netrc
-
-    - name: check master
-      id: check_master
-      run: |
-        src_hash=$(git ls-remote https://github.com/${GITHUB_REPOSITORY} refs/heads/master | cut -f1)
-        dst_hash=$(git ls-remote ${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY} refs/heads/master | cut -f1)
-        echo "src_hash=$src_hash"
-        echo "dst_hash=$dst_hash"
-        if [ "$src_hash" != "$dst_hash" ]; then
-          echo "sync_needed=true" >> $GITHUB_OUTPUT
-        else
-          echo "sync_needed=false" >> $GITHUB_OUTPUT
-        fi
-
-    - name: sync master
-      if: steps.check_master.outputs.sync_needed == 'true'
-      run: |
-        git clone --filter=blob:none --filter=tree:0 --branch master --single-branch ${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY} repo
-        cd repo
-        git remote add --no-tags --fetch --track master upstream https://github.com/${GITHUB_REPOSITORY}
-        git pull --rebase upstream master
-        git push upstream master --progress
-        git push origin master --progress
-        cd ../
-        rm -rf repo
-
-    - name: check v3
-      id: check_v3
-      run: |
-        src_hash=$(git ls-remote https://github.com/${GITHUB_REPOSITORY} refs/heads/v3 | cut -f1)
-        dst_hash=$(git ls-remote ${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY} refs/heads/v3 | cut -f1)
-        echo "src_hash=$src_hash"
-        echo "dst_hash=$dst_hash"
-        if [ "$src_hash" != "$dst_hash" ]; then
-          echo "sync_needed=true" >> $GITHUB_OUTPUT
-        else
-          echo "sync_needed=false" >> $GITHUB_OUTPUT
-        fi
-
-    - name: sync v3
-      if: steps.check_v3.outputs.sync_needed == 'true'
-      run: |
-        git clone --filter=blob:none --filter=tree:0 --branch v3 --single-branch ${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY} repo
-        cd repo
-        git remote add --no-tags --fetch --track v3 upstream https://github.com/${GITHUB_REPOSITORY}
-        git pull --rebase upstream v3
-        git push upstream v3 --progress
-        git push origin v3 --progress
-        cd ../
-        rm -rf repo
-
-    - name: check v4
-      id: check_v4
-      run: |
-        src_hash=$(git ls-remote https://github.com/${GITHUB_REPOSITORY} refs/heads/v4 | cut -f1)
-        dst_hash=$(git ls-remote ${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY} refs/heads/v4 | cut -f1)
-        echo "src_hash=$src_hash"
-        echo "dst_hash=$dst_hash"
-        if [ "$src_hash" != "$dst_hash" ]; then
-          echo "sync_needed=true" >> $GITHUB_OUTPUT
-        else
-          echo "sync_needed=false" >> $GITHUB_OUTPUT
-        fi
-
-    - name: sync v4
-      if: steps.check_v4.outputs.sync_needed == 'true'
-      run: |
-        git clone --filter=blob:none --filter=tree:0 --branch v4 --single-branch ${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY} repo
-        cd repo
-        git remote add --no-tags --fetch --track v4 upstream https://github.com/${GITHUB_REPOSITORY}
-        git pull --rebase upstream v4
-        git push upstream v4 --progress
-        git push origin v4 --progress
-        cd ../
-        rm -rf repo

.golangci.yml

@@ -1,5 +1,5 @@
 run:
   concurrency: 8
-  timeout: 5m
+  deadline: 5m
   issues-exit-code: 1
   tests: true

README.md

@@ -1,4 +0,0 @@
-# GRPC Client
-![Coverage](https://img.shields.io/badge/Coverage-2.3%25-red)
-
-This plugin is a grpc client for micro.

codec.go

@@ -1,7 +1,9 @@
 package grpc
 
 import (
-	"go.unistack.org/micro/v4/codec"
+	"io"
+
+	"go.unistack.org/micro/v3/codec"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/encoding"
 )
@@ -63,3 +65,63 @@ func (w *wrapGrpcCodec) Unmarshal(d []byte, v interface{}, opts ...codec.Option)
 	}
 	return w.Codec.Unmarshal(d, v)
 }
+
+/*
+type grpcCodec struct {
+	grpc.ServerStream
+	// headers
+	id       string
+	target   string
+	method   string
+	endpoint string
+
+	c encoding.Codec
+}
+
+*/
+
+func (w *wrapGrpcCodec) ReadHeader(conn io.Reader, m *codec.Message, mt codec.MessageType) error {
+	/*
+		if m == nil {
+			m = codec.NewMessage(codec.Request)
+		}
+
+		if md, ok := metadata.FromIncomingContext(g.ServerStream.Context()); ok {
+			if m.Header == nil {
+				m.Header = meta.New(len(md))
+			}
+			for k, v := range md {
+				m.Header[k] = strings.Join(v, ",")
+			}
+		}
+
+		m.Id = g.id
+		m.Target = g.target
+		m.Method = g.method
+		m.Endpoint = g.endpoint
+	*/
+	return nil
+}
+
+func (w *wrapGrpcCodec) ReadBody(conn io.Reader, v interface{}) error {
+	// caller has requested a frame
+	if m, ok := v.(*codec.Frame); ok {
+		_, err := conn.Read(m.Data)
+		return err
+	}
+	return codec.ErrInvalidMessage
+}
+
+func (w *wrapGrpcCodec) Write(conn io.Writer, m *codec.Message, v interface{}) error {
+	// if we don't have a body
+	if v != nil {
+		b, err := w.Marshal(v)
+		if err != nil {
+			return err
+		}
+		m.Body = b
+	}
+	// write the body using the framing codec
+	_, err := conn.Write(m.Body)
+	return err
+}

codec_test.go

@@ -1,67 +0,0 @@
-package grpc
-
-import (
-	"context"
-	"testing"
-
-	"go.unistack.org/micro/v4/codec"
-	gmetadata "google.golang.org/grpc/metadata"
-)
-
-type mockStream struct {
-	msg any
-}
-
-func (m mockStream) Header() (gmetadata.MD, error) {
-	return nil, nil
-}
-
-func (m mockStream) Trailer() gmetadata.MD {
-	return nil
-}
-
-func (m mockStream) CloseSend() error {
-	return nil
-}
-
-func (m mockStream) Context() context.Context {
-	return nil
-}
-
-func (m *mockStream) SendMsg(msg any) error {
-	m.msg = msg
-	return nil
-}
-
-func (m *mockStream) RecvMsg(msg any) error {
-
-	c := msg.(*codec.Frame)
-	c.Data = m.msg.(*codec.Frame).Data
-
-	return nil
-}
-
-func Test_ReadWrap(t *testing.T) {
-
-	wp := wrapStream{
-		&mockStream{},
-	}
-
-	write, err := wp.Write([]byte("test_data"))
-	if err != nil {
-		t.Fatal(err)
-	}
-	if write != 9 {
-		t.Error("uncorrected number wrote bytes")
-	}
-
-	b := make([]byte, write)
-	read, err := wp.Read(b)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	if read != 9 || string(b) != "test_data" {
-		t.Error("uncorrected number wrote bytes or data")
-	}
-}

error.go

@@ -1,7 +1,7 @@
 package grpc
 
 import (
-	"go.unistack.org/micro/v4/errors"
+	"go.unistack.org/micro/v3/errors"
 	"google.golang.org/grpc/status"
 )
 

go.mod

@@ -1,24 +1,8 @@
-module go.unistack.org/micro-client-grpc/v4
+module go.unistack.org/micro-client-grpc/v3
 
-go 1.23.0
+go 1.16
-
-toolchain go1.23.3
 
 require (
-	go.unistack.org/micro/v4 v4.1.7
+	go.unistack.org/micro/v3 v3.10.22
-	google.golang.org/grpc v1.72.0
+	google.golang.org/grpc v1.52.3
-)
-
-require (
-	github.com/ash3in/uuidv8 v1.2.0 // indirect
-	github.com/google/uuid v1.6.0 // indirect
-	github.com/matoous/go-nanoid v1.5.1 // indirect
-	github.com/spf13/cast v1.7.1 // indirect
-	go.unistack.org/micro-proto/v4 v4.1.0 // indirect
-	golang.org/x/net v0.39.0 // indirect
-	golang.org/x/sys v0.32.0 // indirect
-	golang.org/x/text v0.24.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20250425173222-7b384671a197 // indirect
-	google.golang.org/protobuf v1.36.6 // indirect
-	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

grpc.go

@@ -1,32 +1,28 @@
-// Package grpc provides a gRPC client for micro framework
+// Package grpc provides a gRPC client
-package grpc
+package grpc // import "go.unistack.org/micro-client-grpc/v3"
 
 import (
 	"context"
 	"crypto/tls"
 	"fmt"
 	"net"
+	"os"
 	"reflect"
-	"strconv"
 	"strings"
 	"sync"
 	"time"
 
-	"go.unistack.org/micro/v4/client"
+	"go.unistack.org/micro/v3/broker"
-	"go.unistack.org/micro/v4/codec"
+	"go.unistack.org/micro/v3/client"
-	"go.unistack.org/micro/v4/errors"
+	"go.unistack.org/micro/v3/codec"
-	"go.unistack.org/micro/v4/metadata"
+	"go.unistack.org/micro/v3/errors"
-	"go.unistack.org/micro/v4/options"
+	"go.unistack.org/micro/v3/metadata"
-	"go.unistack.org/micro/v4/selector"
+	"go.unistack.org/micro/v3/selector"
-	"go.unistack.org/micro/v4/semconv"
-	"go.unistack.org/micro/v4/tracer"
 	"google.golang.org/grpc"
-	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/credentials"
 	"google.golang.org/grpc/credentials/insecure"
 	"google.golang.org/grpc/encoding"
 	gmetadata "google.golang.org/grpc/metadata"
-	"google.golang.org/grpc/status"
 )
 
 const (
@@ -34,12 +30,10 @@ const (
 )
 
 type grpcClient struct {
-	funcCall   client.FuncCall
+	pool *ConnPool
-	funcStream client.FuncStream
+	opts client.Options
-	pool       *ConnPool
+	sync.RWMutex
-	opts       client.Options
+	init bool
-	mu         sync.RWMutex
-	init       bool
 }
 
 // secure returns the dial option for whether its a secure or insecure connection
@@ -74,30 +68,32 @@ func (g *grpcClient) secure(addr string) grpc.DialOption {
 }
 
 func (g *grpcClient) call(ctx context.Context, addr string, req client.Request, rsp interface{}, opts client.CallOptions) error {
-	var header gmetadata.MD
+	var header map[string]string
 
 	if md, ok := metadata.FromOutgoingContext(ctx); ok {
-		header = metadata.Copy(md).AsHTTP2()
+		header = make(map[string]string, len(md))
+		for k, v := range md {
+			header[strings.ToLower(k)] = v
+		}
 	} else {
-		header = make(gmetadata.MD, 4)
+		header = make(map[string]string, 2)
 	}
 	if opts.RequestMetadata != nil {
 		for k, v := range opts.RequestMetadata {
-			header[strings.ToLower(k)] = v
+			header[k] = v
 		}
 	}
 	// set timeout in nanoseconds
-	if opts.RequestTimeout > time.Duration(0) {
+	header["Grpc-Timeout"] = fmt.Sprintf("%dn", opts.RequestTimeout)
-		header.Set("grpc-timeout", fmt.Sprintf("%dn", opts.RequestTimeout))
+	header["timeout"] = fmt.Sprintf("%dn", opts.RequestTimeout)
-		header.Set("timeout", fmt.Sprintf("%dn", opts.RequestTimeout))
+	header["content-type"] = req.ContentType()
-	}
-	header.Set("content-type", req.ContentType())
 
-	ctx = gmetadata.NewOutgoingContext(ctx, header)
+	md := gmetadata.New(header)
+	ctx = gmetadata.NewOutgoingContext(ctx, md)
 
 	cf, err := g.newCodec(req.ContentType())
 	if err != nil {
-		return errors.InternalServerError("go.micro.client", "%+v", err)
+		return errors.InternalServerError("go.micro.client", err.Error())
 	}
 
 	maxRecvMsgSize := g.maxRecvMsgSizeValue()
@@ -124,9 +120,6 @@ func (g *grpcClient) call(ctx context.Context, addr string, req client.Request,
 		grpc.WithDefaultServiceConfig(cfgService),
 	}
 
-	if opts := g.getGrpcDialOptions(g.opts.Context); opts != nil {
-		grpcDialOptions = append(grpcDialOptions, opts...)
-	}
 	if opts := g.getGrpcDialOptions(opts.Context); opts != nil {
 		grpcDialOptions = append(grpcDialOptions, opts...)
 	}
@@ -141,7 +134,7 @@ func (g *grpcClient) call(ctx context.Context, addr string, req client.Request,
 
 	cc, err := g.pool.Get(dialCtx, addr, grpcDialOptions...)
 	if err != nil {
-		return errors.InternalServerError("go.micro.client", "Error sending request: %v", err)
+		return errors.InternalServerError("go.micro.client", fmt.Sprintf("Error sending request: %v", err))
 	}
 	defer func() {
 		// defer execution of release
@@ -179,7 +172,7 @@ func (g *grpcClient) call(ctx context.Context, addr string, req client.Request,
 	if opts.ResponseMetadata != nil {
 		*opts.ResponseMetadata = metadata.New(gmd.Len())
 		for k, v := range gmd {
-			opts.ResponseMetadata.Append(k, v...)
+			opts.ResponseMetadata.Set(k, strings.Join(v, ","))
 		}
 	}
 
@@ -187,25 +180,31 @@ func (g *grpcClient) call(ctx context.Context, addr string, req client.Request,
 }
 
 func (g *grpcClient) stream(ctx context.Context, addr string, req client.Request, rsp interface{}, opts client.CallOptions) error {
-	var header gmetadata.MD
+	var header map[string]string
 
 	if md, ok := metadata.FromOutgoingContext(ctx); ok {
-		header = metadata.Copy(md).AsHTTP2()
+		header = make(map[string]string, len(md))
+		for k, v := range md {
+			header[k] = v
+		}
 	} else {
-		header = make(gmetadata.MD, 4)
+		header = make(map[string]string)
 	}
 
-	if opts.RequestTimeout > time.Duration(0) {
+	// set timeout in nanoseconds
-		header.Set("grpc-timeout", fmt.Sprintf("%dn", opts.RequestTimeout))
+	if opts.StreamTimeout > time.Duration(0) {
-		header.Set("timeout", fmt.Sprintf("%dn", opts.RequestTimeout))
+		header["Grpc-Timeout"] = fmt.Sprintf("%dn", opts.StreamTimeout)
+		header["timeout"] = fmt.Sprintf("%dn", opts.StreamTimeout)
 	}
-	header.Set("content-type", req.ContentType())
+	// set the content type for the request
+	header["content-type"] = req.ContentType()
 
-	ctx = gmetadata.NewOutgoingContext(ctx, header)
+	md := gmetadata.New(header)
+	ctx = gmetadata.NewOutgoingContext(ctx, md)
 
 	cf, err := g.newCodec(req.ContentType())
 	if err != nil {
-		return errors.InternalServerError("go.micro.client", "%+v", err)
+		return errors.InternalServerError("go.micro.client", err.Error())
 	}
 
 	var dialCtx context.Context
@@ -246,7 +245,7 @@ func (g *grpcClient) stream(ctx context.Context, addr string, req client.Request
 
 	cc, err := g.pool.Get(dialCtx, addr, grpcDialOptions...)
 	if err != nil {
-		return errors.InternalServerError("go.micro.client", "Error sending request: %v", err)
+		return errors.InternalServerError("go.micro.client", fmt.Sprintf("Error sending request: %v", err))
 	}
 
 	desc := &grpc.StreamDesc{
@@ -279,7 +278,7 @@ func (g *grpcClient) stream(ctx context.Context, addr string, req client.Request
 		// release the connection
 		g.pool.Put(cc, err)
 		// now return the error
-		return errors.InternalServerError("go.micro.client", "Error creating stream: %v", err)
+		return errors.InternalServerError("go.micro.client", fmt.Sprintf("Error creating stream: %v", err))
 	}
 
 	// set request codec
@@ -361,8 +360,8 @@ func (g *grpcClient) maxSendMsgSizeValue() int {
 }
 
 func (g *grpcClient) newCodec(ct string) (codec.Codec, error) {
-	g.mu.RLock()
+	g.RLock()
-	defer g.mu.RUnlock()
+	defer g.RUnlock()
 
 	if idx := strings.IndexRune(ct, ';'); idx >= 0 {
 		ct = ct[:idx]
@@ -398,23 +397,31 @@ func (g *grpcClient) Init(opts ...client.Option) error {
 
 	// update pool configuration if the options changed
 	if size != g.opts.PoolSize || ttl != g.opts.PoolTTL {
-		g.pool.mu.Lock()
+		g.pool.Lock()
 		g.pool.size = g.opts.PoolSize
 		g.pool.ttl = int64(g.opts.PoolTTL.Seconds())
-		g.pool.mu.Unlock()
+		g.pool.Unlock()
 	}
 
-	g.funcCall = g.fnCall
+	if err := g.opts.Broker.Init(); err != nil {
-	g.funcStream = g.fnStream
+		return err
+	}
+	if err := g.opts.Tracer.Init(); err != nil {
+		return err
+	}
+	if err := g.opts.Router.Init(); err != nil {
+		return err
+	}
+	if err := g.opts.Logger.Init(); err != nil {
+		return err
+	}
+	if err := g.opts.Meter.Init(); err != nil {
+		return err
+	}
+	if err := g.opts.Transport.Init(); err != nil {
+		return err
+	}
 
-	g.opts.Hooks.EachPrev(func(hook options.Hook) {
-		switch h := hook.(type) {
-		case client.HookCall:
-			g.funcCall = h(g.funcCall)
-		case client.HookStream:
-			g.funcStream = h(g.funcStream)
-		}
-	})
 	g.init = true
 
 	return nil
@@ -424,6 +431,10 @@ func (g *grpcClient) Options() client.Options {
 	return g.opts
 }
 
+func (g *grpcClient) NewMessage(topic string, msg interface{}, opts ...client.MessageOption) client.Message {
+	return newGRPCEvent(topic, msg, g.opts.ContentType, opts...)
+}
+
 func (g *grpcClient) NewRequest(service, method string, req interface{}, reqOpts ...client.RequestOption) client.Request {
 	return newGRPCRequest(service, method, req, g.opts.ContentType, reqOpts...)
 }
@@ -434,32 +445,6 @@ func (g *grpcClient) Call(ctx context.Context, req client.Request, rsp interface
 	} else if rsp == nil {
 		return errors.InternalServerError("go.micro.client", "rsp is nil")
 	}
-
-	ts := time.Now()
-	g.opts.Meter.Counter(semconv.ClientRequestInflight, "endpoint", req.Endpoint()).Inc()
-	var sp tracer.Span
-	ctx, sp = g.opts.Tracer.Start(ctx, req.Endpoint()+" rpc-client",
-		tracer.WithSpanKind(tracer.SpanKindClient),
-		tracer.WithSpanLabels("endpoint", req.Endpoint()),
-	)
-	err := g.funcCall(ctx, req, rsp, opts...)
-	g.opts.Meter.Counter(semconv.ClientRequestInflight, "endpoint", req.Endpoint()).Dec()
-	te := time.Since(ts)
-	g.opts.Meter.Summary(semconv.ClientRequestLatencyMicroseconds, "endpoint", req.Endpoint()).Update(te.Seconds())
-	g.opts.Meter.Histogram(semconv.ClientRequestDurationSeconds, "endpoint", req.Endpoint()).Update(te.Seconds())
-
-	if me := errors.FromError(err); me == nil {
-		sp.Finish()
-		g.opts.Meter.Counter(semconv.ClientRequestTotal, "endpoint", req.Endpoint(), "status", "success", "code", strconv.Itoa(int(200))).Inc()
-	} else {
-		sp.SetStatus(tracer.SpanStatusError, err.Error())
-		g.opts.Meter.Counter(semconv.ClientRequestTotal, "endpoint", req.Endpoint(), "status", "failure", "code", strconv.Itoa(int(me.Code))).Inc()
-	}
-
-	return err
-}
-
-func (g *grpcClient) fnCall(ctx context.Context, req client.Request, rsp interface{}, opts ...client.CallOption) error {
 	// make a copy of call opts
 	callOpts := g.opts.CallOptions
 
@@ -491,6 +476,11 @@ func (g *grpcClient) fnCall(ctx context.Context, req client.Request, rsp interfa
 	// make copy of call method
 	gcall := g.call
 
+	// wrap the call in reverse
+	for i := len(callOpts.CallWrappers); i > 0; i-- {
+		gcall = callOpts.CallWrappers[i-1](gcall)
+	}
+
 	// use the router passed as a call option, or fallback to the rpc clients router
 	if callOpts.Router == nil {
 		callOpts.Router = g.opts.Router
@@ -512,7 +502,7 @@ func (g *grpcClient) fnCall(ctx context.Context, req client.Request, rsp interfa
 		// call backoff first. Someone may want an initial start delay
 		t, err := callOpts.Backoff(ctx, req, i)
 		if err != nil {
-			return errors.InternalServerError("go.micro.client", "%+v", err)
+			return errors.InternalServerError("go.micro.client", err.Error())
 		}
 
 		// only sleep if greater than 0
@@ -527,7 +517,7 @@ func (g *grpcClient) fnCall(ctx context.Context, req client.Request, rsp interfa
 			// TODO apply any filtering here
 			routes, err = g.opts.Lookup(ctx, req, callOpts)
 			if err != nil {
-				return errors.InternalServerError("go.micro.client", "%+v", err)
+				return errors.InternalServerError("go.micro.client", err.Error())
 			}
 
 			// balance the list of nodes
@@ -590,31 +580,6 @@ func (g *grpcClient) fnCall(ctx context.Context, req client.Request, rsp interfa
 }
 
 func (g *grpcClient) Stream(ctx context.Context, req client.Request, opts ...client.CallOption) (client.Stream, error) {
-	ts := time.Now()
-	g.opts.Meter.Counter(semconv.ClientRequestInflight, "endpoint", req.Endpoint()).Inc()
-	var sp tracer.Span
-	ctx, sp = g.opts.Tracer.Start(ctx, req.Endpoint()+" rpc-client",
-		tracer.WithSpanKind(tracer.SpanKindClient),
-		tracer.WithSpanLabels("endpoint", req.Endpoint()),
-	)
-	stream, err := g.funcStream(ctx, req, opts...)
-	g.opts.Meter.Counter(semconv.ClientRequestInflight, "endpoint", req.Endpoint()).Dec()
-	te := time.Since(ts)
-	g.opts.Meter.Summary(semconv.ClientRequestLatencyMicroseconds, "endpoint", req.Endpoint()).Update(te.Seconds())
-	g.opts.Meter.Histogram(semconv.ClientRequestDurationSeconds, "endpoint", req.Endpoint()).Update(te.Seconds())
-
-	if me := status.Convert(err); me == nil {
-		sp.Finish()
-		g.opts.Meter.Counter(semconv.ClientRequestTotal, "endpoint", req.Endpoint(), "status", "success", "code", strconv.Itoa(int(codes.OK))).Inc()
-	} else {
-		sp.SetStatus(tracer.SpanStatusError, err.Error())
-		g.opts.Meter.Counter(semconv.ClientRequestTotal, "endpoint", req.Endpoint(), "status", "failure", "code", strconv.Itoa(int(me.Code()))).Inc()
-	}
-
-	return stream, err
-}
-
-func (g *grpcClient) fnStream(ctx context.Context, req client.Request, opts ...client.CallOption) (client.Stream, error) {
 	// make a copy of call opts
 	callOpts := g.opts.CallOptions
 	for _, opt := range opts {
@@ -633,6 +598,11 @@ func (g *grpcClient) fnStream(ctx context.Context, req client.Request, opts ...c
 	// make a copy of stream
 	gstream := g.stream
 
+	// wrap the call in reverse
+	for i := len(callOpts.CallWrappers); i > 0; i-- {
+		gstream = callOpts.CallWrappers[i-1](gstream)
+	}
+
 	// use the router passed as a call option, or fallback to the rpc clients router
 	if callOpts.Router == nil {
 		callOpts.Router = g.opts.Router
@@ -654,7 +624,7 @@ func (g *grpcClient) fnStream(ctx context.Context, req client.Request, opts ...c
 		// call backoff first. Someone may want an initial start delay
 		t, err := callOpts.Backoff(ctx, req, i)
 		if err != nil {
-			return nil, errors.InternalServerError("go.micro.client", "%+v", err)
+			return nil, errors.InternalServerError("go.micro.client", err.Error())
 		}
 
 		// only sleep if greater than 0
@@ -669,7 +639,7 @@ func (g *grpcClient) fnStream(ctx context.Context, req client.Request, opts ...c
 			// TODO apply any filtering here
 			routes, err = g.opts.Lookup(ctx, req, callOpts)
 			if err != nil {
-				return nil, errors.InternalServerError("go.micro.client", "%+v", err)
+				return nil, errors.InternalServerError("go.micro.client", err.Error())
 			}
 
 			// balance the list of nodes
@@ -742,6 +712,71 @@ func (g *grpcClient) fnStream(ctx context.Context, req client.Request, opts ...c
 	return nil, grr
 }
 
+func (g *grpcClient) BatchPublish(ctx context.Context, ps []client.Message, opts ...client.PublishOption) error {
+	return g.publish(ctx, ps, opts...)
+}
+
+func (g *grpcClient) Publish(ctx context.Context, p client.Message, opts ...client.PublishOption) error {
+	return g.publish(ctx, []client.Message{p}, opts...)
+}
+
+func (g *grpcClient) publish(ctx context.Context, ps []client.Message, opts ...client.PublishOption) error {
+	var body []byte
+
+	options := client.NewPublishOptions(opts...)
+
+	// get proxy
+	exchange := ""
+	if v, ok := os.LookupEnv("MICRO_PROXY"); ok {
+		exchange = v
+	}
+
+	msgs := make([]*broker.Message, 0, len(ps))
+
+	omd, ok := metadata.FromOutgoingContext(ctx)
+	if !ok {
+		omd = metadata.New(2)
+	}
+
+	for _, p := range ps {
+		md := metadata.Copy(omd)
+		md[metadata.HeaderContentType] = p.ContentType()
+
+		// passed in raw data
+		if d, ok := p.Payload().(*codec.Frame); ok {
+			body = d.Data
+		} else {
+			// use codec for payload
+			cf, err := g.newCodec(p.ContentType())
+			if err != nil {
+				return errors.InternalServerError("go.micro.client", err.Error())
+			}
+			// set the body
+			b, err := cf.Marshal(p.Payload())
+			if err != nil {
+				return errors.InternalServerError("go.micro.client", err.Error())
+			}
+			body = b
+		}
+
+		topic := p.Topic()
+		if len(exchange) > 0 {
+			topic = exchange
+		}
+
+		for k, v := range p.Metadata() {
+			md.Set(k, v)
+		}
+		md.Set(metadata.HeaderTopic, topic)
+		msgs = append(msgs, &broker.Message{Header: md, Body: body})
+	}
+
+	return g.opts.Broker.BatchPublish(ctx, msgs,
+		broker.PublishContext(options.Context),
+		broker.PublishBodyOnly(options.BodyOnly),
+	)
+}
+
 func (g *grpcClient) String() string {
 	return "grpc"
 }
@@ -801,16 +836,22 @@ func NewClient(opts ...client.Option) client.Client {
 		options.ContentType = DefaultContentType
 	}
 
-	c := &grpcClient{
+	rc := &grpcClient{
 		opts: options,
 	}
 
-	c.pool = NewConnPool(options.PoolSize, options.PoolTTL, c.poolMaxIdle(), c.poolMaxStreams())
+	rc.pool = NewConnPool(options.PoolSize, options.PoolTTL, rc.poolMaxIdle(), rc.poolMaxStreams())
+	c := client.Client(rc)
 
-	if c.opts.Context != nil {
+	// wrap in reverse
-		if codecs, ok := c.opts.Context.Value(codecsKey{}).(map[string]encoding.Codec); ok && codecs != nil {
+	for i := len(options.Wrappers); i > 0; i-- {
+		c = options.Wrappers[i-1](c)
+	}
+
+	if rc.opts.Context != nil {
+		if codecs, ok := rc.opts.Context.Value(codecsKey{}).(map[string]encoding.Codec); ok && codecs != nil {
 			for k, v := range codecs {
-				c.opts.Codecs[k] = &wrapGrpcCodec{v}
+				rc.opts.Codecs[k] = &wrapGrpcCodec{v}
 			}
 		}
 	}
@@ -819,8 +860,5 @@ func NewClient(opts ...client.Option) client.Client {
 		encoding.RegisterCodec(&wrapMicroCodec{k})
 	}
 
-	c.funcCall = c.fnCall
-	c.funcStream = c.fnStream
-
 	return c
 }

grpc_pool.go

@@ -16,7 +16,7 @@ type ConnPool struct {
 	ttl        int64
 	maxStreams int
 	maxIdle    int
-	mu         sync.Mutex
+	sync.Mutex
 }
 
 type streamsPool struct {
@@ -64,7 +64,7 @@ func (p *ConnPool) Get(ctx context.Context, addr string, opts ...grpc.DialOption
 		addr = addr[strings.Index(addr, ":")+3:]
 	}
 	now := time.Now().Unix()
-	p.mu.Lock()
+	p.Lock()
 	sp, ok := p.conns[addr]
 	if !ok {
 		sp = &streamsPool{head: &PoolConn{}, busy: &PoolConn{}, count: 0, idle: 0}
@@ -125,12 +125,12 @@ func (p *ConnPool) Get(ctx context.Context, addr string, opts ...grpc.DialOption
 		}
 		//  a good conn
 		conn.streams++
-		p.mu.Unlock()
+		p.Unlock()
 		return conn, nil
 	}
-	p.mu.Unlock()
+	p.Unlock()
 
-	// nolint (TODO need fix)  create new conn)
+	//  create new conn)
 	cc, err := grpc.DialContext(ctx, addr, opts...)
 	if err != nil {
 		return nil, err
@@ -138,24 +138,24 @@ func (p *ConnPool) Get(ctx context.Context, addr string, opts ...grpc.DialOption
 	conn = &PoolConn{ClientConn: cc, err: nil, addr: addr, pool: p, sp: sp, streams: 1, created: time.Now().Unix(), pre: nil, next: nil, in: false}
 
 	//  add conn to streams pool
-	p.mu.Lock()
+	p.Lock()
 	if sp.count < p.size {
 		addConnAfter(conn, sp.head)
 	}
-	p.mu.Unlock()
+	p.Unlock()
 
 	return conn, nil
 }
 
 func (p *ConnPool) Put(conn *PoolConn, err error) {
-	p.mu.Lock()
+	p.Lock()
 	p, sp, created := conn.pool, conn.sp, conn.created
 	//  try to add conn
 	if !conn.in && sp.count < p.size {
 		addConnAfter(conn, sp.head)
 	}
 	if !conn.in {
-		p.mu.Unlock()
+		p.Unlock()
 		conn.ClientConn.Close()
 		return
 	}
@@ -173,13 +173,13 @@ func (p *ConnPool) Put(conn *PoolConn, err error) {
 		now := time.Now().Unix()
 		if err != nil || sp.idle >= p.maxIdle || now-created > p.ttl {
 			removeConn(conn)
-			p.mu.Unlock()
+			p.Unlock()
 			conn.ClientConn.Close()
 			return
 		}
 		sp.idle++
 	}
-	p.mu.Unlock()
+	p.Unlock()
 }
 
 func (conn *PoolConn) Close() {

message.go

@@ -0,0 +1,44 @@
+package grpc
+
+import (
+	"go.unistack.org/micro/v3/client"
+	"go.unistack.org/micro/v3/metadata"
+)
+
+type grpcEvent struct {
+	payload     interface{}
+	topic       string
+	contentType string
+	opts        client.MessageOptions
+}
+
+func newGRPCEvent(topic string, payload interface{}, contentType string, opts ...client.MessageOption) client.Message {
+	options := client.NewMessageOptions(opts...)
+
+	if len(options.ContentType) > 0 {
+		contentType = options.ContentType
+	}
+
+	return &grpcEvent{
+		payload:     payload,
+		topic:       topic,
+		contentType: contentType,
+		opts:        options,
+	}
+}
+
+func (g *grpcEvent) ContentType() string {
+	return g.contentType
+}
+
+func (g *grpcEvent) Topic() string {
+	return g.topic
+}
+
+func (g *grpcEvent) Payload() interface{} {
+	return g.payload
+}
+
+func (g *grpcEvent) Metadata() metadata.Metadata {
+	return g.opts.Metadata
+}

options.go

@@ -4,7 +4,7 @@ package grpc
 import (
 	"context"
 
-	"go.unistack.org/micro/v4/client"
+	"go.unistack.org/micro/v3/client"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/encoding"
 )
@@ -98,8 +98,8 @@ func MaxSendMsgSize(s int) client.Option {
 type grpcDialOptions struct{}
 
 // DialOptions to be used to configure gRPC dial options
-func DialOptions(opts ...grpc.DialOption) client.Option {
+func DialOptions(opts ...grpc.DialOption) client.CallOption {
-	return func(o *client.Options) {
+	return func(o *client.CallOptions) {
 		if o.Context == nil {
 			o.Context = context.Background()
 		}

request.go

@@ -4,8 +4,8 @@ import (
 	"fmt"
 	"strings"
 
-	"go.unistack.org/micro/v4/client"
+	"go.unistack.org/micro/v3/client"
-	"go.unistack.org/micro/v4/codec"
+	"go.unistack.org/micro/v3/codec"
 )
 
 type grpcRequest struct {

response.go

@@ -1,8 +1,10 @@
 package grpc
 
 import (
-	"go.unistack.org/micro/v4/codec"
+	"strings"
-	"go.unistack.org/micro/v4/metadata"
+
+	"go.unistack.org/micro/v3/codec"
+	"go.unistack.org/micro/v3/metadata"
 	"google.golang.org/grpc"
 )
 
@@ -23,19 +25,18 @@ func (r *response) Header() metadata.Metadata {
 	if err != nil {
 		return nil
 	}
-
+	md := metadata.New(len(meta))
-	return metadata.Metadata(meta.Copy())
+	for k, v := range meta {
+		md.Set(k, strings.Join(v, ","))
+	}
+	return md
 }
 
 // Read the undecoded response
 func (r *response) Read() ([]byte, error) {
 	f := &codec.Frame{}
-	wrap := &wrapStream{r.stream}
+	if err := r.codec.ReadBody(&wrapStream{r.stream}, f); err != nil {
-
-	_, err := wrap.Read(f.Data)
-	if err != nil {
 		return nil, err
 	}
-
 	return f.Data, nil
 }

stream.go

@@ -5,8 +5,7 @@ import (
 	"io"
 	"sync"
 
-	"go.unistack.org/micro/v4/client"
+	"go.unistack.org/micro/v3/client"
-	"go.unistack.org/micro/v4/tracer"
 	"google.golang.org/grpc"
 )
 
@@ -19,8 +18,8 @@ type grpcStream struct {
 	response client.Response
 	close    func(err error)
 	conn     *PoolConn
-	mu       sync.RWMutex
+	sync.RWMutex
-	closed   bool
+	closed bool
 }
 
 func (g *grpcStream) Context() context.Context {
@@ -88,15 +87,15 @@ func (g *grpcStream) RecvMsg(msg interface{}) (err error) {
 }
 
 func (g *grpcStream) Error() error {
-	g.mu.RLock()
+	g.RLock()
-	defer g.mu.RUnlock()
+	defer g.RUnlock()
 	return g.err
 }
 
 func (g *grpcStream) setError(e error) {
-	g.mu.Lock()
+	g.Lock()
 	g.err = e
-	g.mu.Unlock()
+	g.Unlock()
 }
 
 // Close the gRPC send stream
@@ -105,19 +104,13 @@ func (g *grpcStream) setError(e error) {
 // stream should still be able to receive after this function call
 // TODO: should the conn be closed in another way?
 func (g *grpcStream) Close() error {
-	g.mu.Lock()
+	g.Lock()
-	defer g.mu.Unlock()
+	defer g.Unlock()
 
 	if g.closed {
 		return nil
 	}
 
-	if sp, ok := tracer.SpanFromContext(g.context); ok && sp != nil {
-		if g.err != nil {
-			sp.SetStatus(tracer.SpanStatusError, g.err.Error())
-		}
-		sp.Finish()
-	}
 	// close the connection
 	g.closed = true
 	g.close(g.err)
@@ -125,8 +118,8 @@ func (g *grpcStream) Close() error {
 }
 
 func (g *grpcStream) CloseSend() error {
-	g.mu.Lock()
+	g.Lock()
-	defer g.mu.Unlock()
+	defer g.Unlock()
 
 	if g.closed {
 		return nil