prepare v4 (#139)

move to v4 micro

Co-authored-by: Василий Толстов <v.tolstov@unistack.org>
Co-authored-by: Александр Толстихин <tolstihin1996@mail.ru>
Reviewed-on: #139
Co-authored-by: Evstigneev Denis <danteevstigneev@yandex.ru>
Co-committed-by: Evstigneev Denis <danteevstigneev@yandex.ru>

.gitea/workflows/job_lint.yml

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

.gitea/workflows/job_test.yml

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

.gitea/workflows/job_tests.yml

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

.github/renovate.json

@@ -1,19 +0,0 @@
-{
-  "extends": [
-    "config:base"
-  ],
-  "packageRules": [
-    {
-      "matchUpdateTypes": ["minor", "patch", "pin", "digest"],
-      "automerge": true
-    },
-    {
-      "groupName": "all deps",
-      "separateMajorMinor": true,
-      "groupSlug": "all",
-      "packagePatterns": [
-        "*"
-      ]
-    }
-  ]
-}

.github/workflows/build.yml

@@ -1,46 +0,0 @@
-name: build
-on:
- push:
-    branches:
-    - master
-jobs:
-  test:
-    name: test
-    runs-on: ubuntu-latest
-    steps:
-    - name: setup
-      uses: actions/setup-go@v2
-      with:
-        go-version: 1.16
-    - name: checkout
-      uses: actions/checkout@v2
-    - name: cache
-      uses: actions/cache@v2
-      with:
-        path: ~/go/pkg/mod
-        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
-        restore-keys: ${{ runner.os }}-go-
-    - name: deps
-      run: go get -v -t -d ./...
-    - name: test
-      env:
-        INTEGRATION_TESTS: yes
-      run: go test -mod readonly -v ./...
-  lint:
-    name: lint
-    runs-on: ubuntu-latest
-    steps:
-      - name: checkout
-        uses: actions/checkout@v2
-      - name: lint
-        uses: golangci/golangci-lint-action@v2
-        continue-on-error: true
-        with:
-          # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.
-          version: v1.30
-          # Optional: working directory, useful for monorepos
-          # working-directory: somedir
-          # Optional: golangci-lint command line arguments.
-          # args: --issues-exit-code=0
-          # Optional: show only new issues if it's a pull request. The default value is `false`.
-          # only-new-issues: true

.github/workflows/pr.yml

@@ -1,46 +0,0 @@
-name: prbuild
-on:
-  pull_request:
-    branches:
-    - master
-jobs:
-  test:
-    name: test
-    runs-on: ubuntu-latest
-    steps:
-    - name: setup
-      uses: actions/setup-go@v2
-      with:
-        go-version: 1.16
-    - name: checkout
-      uses: actions/checkout@v2
-    - name: cache
-      uses: actions/cache@v2
-      with:
-        path: ~/go/pkg/mod
-        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
-        restore-keys: ${{ runner.os }}-go-
-    - name: deps
-      run: go get -v -t -d ./...
-    - name: test
-      env:
-        INTEGRATION_TESTS: yes
-      run: go test -mod readonly -v ./...
-  lint:
-    name: lint
-    runs-on: ubuntu-latest
-    steps:
-      - name: checkout
-        uses: actions/checkout@v2
-      - name: lint
-        uses: golangci/golangci-lint-action@v2
-        continue-on-error: true
-        with:
-          # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.
-          version: v1.30
-          # Optional: working directory, useful for monorepos
-          # working-directory: somedir
-          # Optional: golangci-lint command line arguments.
-          # args: --issues-exit-code=0
-          # Optional: show only new issues if it's a pull request. The default value is `false`.
-          # only-new-issues: true

.gitignore

@@ -0,0 +1,24 @@
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+bin
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+
+# Go workspace file
+go.work
+
+# General
+.DS_Store
+.idea
+.vscode

.golangci.yml

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

codec.go

@@ -1,13 +1,16 @@
 package grpc
 
 import (
-	"io"
-
-	"github.com/unistack-org/micro/v3/codec"
+	"go.unistack.org/micro/v4/codec"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/encoding"
 )
 
+var (
+	_ encoding.Codec = &wrapMicroCodec{}
+	_ codec.Codec    = &wrapGrpcCodec{}
+)
+
 type wrapStream struct{ grpc.ClientStream }
 
 func (w *wrapStream) Write(d []byte) (int, error) {
@@ -19,7 +22,7 @@ func (w *wrapStream) Write(d []byte) (int, error) {
 func (w *wrapStream) Read(d []byte) (int, error) {
 	m := &codec.Frame{}
 	err := w.ClientStream.RecvMsg(m)
-	d = m.Data
+	copy(d, m.Data)
 	return len(d), err
 }
 
@@ -29,20 +32,28 @@ func (w *wrapMicroCodec) Name() string {
 	return w.Codec.String()
 }
 
+func (w *wrapMicroCodec) Marshal(v interface{}) ([]byte, error) {
+	return w.Codec.Marshal(v)
+}
+
+func (w *wrapMicroCodec) Unmarshal(d []byte, v interface{}) error {
+	return w.Codec.Unmarshal(d, v)
+}
+
 type wrapGrpcCodec struct{ encoding.Codec }
 
 func (w *wrapGrpcCodec) String() string {
 	return w.Codec.Name()
 }
 
-func (w *wrapGrpcCodec) Marshal(v interface{}) ([]byte, error) {
+func (w *wrapGrpcCodec) Marshal(v interface{}, opts ...codec.Option) ([]byte, error) {
 	if m, ok := v.(*codec.Frame); ok {
 		return m.Data, nil
 	}
 	return w.Codec.Marshal(v)
 }
 
-func (w *wrapGrpcCodec) Unmarshal(d []byte, v interface{}) error {
+func (w *wrapGrpcCodec) Unmarshal(d []byte, v interface{}, opts ...codec.Option) error {
 	if d == nil || v == nil {
 		return nil
 	}
@@ -52,63 +63,3 @@ func (w *wrapGrpcCodec) Unmarshal(d []byte, v interface{}) error {
 	}
 	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

@@ -0,0 +1,67 @@
+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 (
-	"github.com/unistack-org/micro/v3/errors"
+	"go.unistack.org/micro/v4/errors"
 	"google.golang.org/grpc/status"
 )
 
@@ -9,36 +9,46 @@ func microError(err error) error {
 	// no error
 
 	if err == nil {
+		// nothing to do
 		return nil
 	}
 
 	if verr, ok := err.(*errors.Error); ok {
+		// micro error
 		return verr
 	}
 
 	// grpc error
 	s, ok := status.FromError(err)
 	if !ok {
+		// can't get status detals from grpc error, return base error
 		return err
 	}
 
-	// return first error from details
-	if details := s.Details(); len(details) > 0 {
-		if verr, ok := details[0].(error); ok {
-			return microError(verr)
+	details := s.Details()
+	switch len(details) {
+	case 0:
+		if verr := errors.Parse(s.Message()); verr.Code > 0 {
+			// return micro error
+			return verr
 		}
+		// return base error as it not micro error
+		return err
+	case 1:
+		if verr, ok := details[0].(*errors.Error); ok {
+			// return nested micro error
+			return verr
+		}
+		// return base error as it not holds micro error
+		return err
 	}
 
-	// try to decode micro *errors.Error
-	if e := errors.Parse(s.Message()); e.Code > 0 {
-		return e // actually a micro error
+	// attached messages in details more then 1, try to fallback to micro error
+	if verr := errors.Parse(s.Message()); verr.Code > 0 {
+		// return micro error
+		return verr
 	}
 
-	// fallback
-	return &errors.Error{
-		Id:     "go.micro.client",
-		Code:   int32(s.Code()),
-		Detail: s.Message(),
-		Status: s.Code().String(),
-	}
+	// not micro error return base error
+	return err
 }

go.mod

@@ -1,13 +1,24 @@
-module github.com/unistack-org/micro-client-grpc/v3
+module go.unistack.org/micro-client-grpc/v4
 
-go 1.16
+go 1.23.0
+
+toolchain go1.23.3
 
 require (
-	github.com/google/go-cmp v0.5.1 // indirect
-	github.com/unistack-org/micro/v3 v3.3.17
-	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
-	google.golang.org/genproto v0.0.0-20200904004341-0bd0a958aa1d // indirect
-	google.golang.org/grpc v1.37.1
+	go.unistack.org/micro/v4 v4.1.2
+	google.golang.org/grpc v1.70.0
 )
 
-//replace github.com/unistack-org/micro/v3 => ../../micro
+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 v0.35.0 // indirect
+	golang.org/x/sys v0.30.0 // indirect
+	golang.org/x/text v0.22.0 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20250224174004-546df14abb99 // indirect
+	google.golang.org/protobuf v1.36.5 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

go.sum

@@ -1,153 +1,57 @@
-cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
-github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
-github.com/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
-github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/dgrijalva/jwt-go v3.2.0+incompatible/go.mod h1:E3ru+11k8xSBh+hMPgOLZmtrrCbhqsmaPHjLKYnJCaQ=
-github.com/ef-ds/deque v1.0.4/go.mod h1:gXDnTC3yqvBcHbq2lcExjtAcVrOnJCbMcZXmuj8Z4tg=
-github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
-github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
-github.com/envoyproxy/go-control-plane v0.9.9-0.20201210154907-fd9021fe5dad/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
-github.com/envoyproxy/go-control-plane v0.9.9-0.20210217033140-668b12f5399d/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
-github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
-github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
-github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
-github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/golang/protobuf v1.4.0-rc.1/go.mod h1:ceaxUfeHdC40wWswd/P6IGgMaK3YpKi5j83Wpe3EHw8=
-github.com/golang/protobuf v1.4.0-rc.1.0.20200221234624-67d41d38c208/go.mod h1:xKAWHe0F5eneWXFV3EuXVDTCmh+JuBKY0li0aMyXATA=
-github.com/golang/protobuf v1.4.0-rc.2/go.mod h1:LlEzMj4AhA7rCAGe4KMBDvJI+AwstrUpVNzEA03Pprs=
-github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:WU3c8KckQ9AFe+yFwt9sWVRKCVIyN9cPHBJSNnbL67w=
-github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvqG2KuDX0=
-github.com/golang/protobuf v1.4.1/go.mod h1:U8fpvMrcmy5pZrNK1lt4xCsGvpyWQ/VVv6QDs8UjoX8=
-github.com/golang/protobuf v1.4.2 h1:+Z5KGCizgyZCbGh1KZqA0fcLLkwbsjIzS4aV2v7wJX0=
-github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
-github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
-github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
-github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
-github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/google/go-cmp v0.5.1 h1:JFrFEBb2xKufg6XkJsJr+WbKb4FQlURi5RUcBveYu9k=
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+github.com/golang/protobuf v1.5.4 h1:i7eJL8qZTpSEXOPTxNKhASYpMn+8e5Q6AdndVa1dWek=
+github.com/golang/protobuf v1.5.4/go.mod h1:lnTiLA8Wa4RWRcIUkrtSVa5nRhsEGBg48fD6rSs7xps=
+github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
+github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
+github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
+github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
+github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
+github.com/matoous/go-nanoid v1.5.1 h1:aCjdvTyO9LLnTIi0fgdXhOPPvOHjpXN6Ik9DaNjIct4=
+github.com/matoous/go-nanoid v1.5.1/go.mod h1:zyD2a71IubI24efhpvkJz+ZwfwagzgSO6UNiFsZKN7U=
+github.com/rogpeppe/go-internal v1.13.1 h1:KvO1DLK/DRN07sQ1LQKScxyZJuNnedQ5/wKSR38lUII=
+github.com/rogpeppe/go-internal v1.13.1/go.mod h1:uMEvuHeurkdAXX61udpOXGD/AzZDWNMNyH2VO9fmH0o=
+github.com/spf13/cast v1.7.1 h1:cuNEagBQEHWN1FnbGEjCXL2szYEXqfJPbP2HNUaca9Y=
+github.com/spf13/cast v1.7.1/go.mod h1:ancEpBxwJDODSW/UG4rDrAqiKolqNNh2DX3mk86cAdo=
+go.opentelemetry.io/otel v1.32.0 h1:WnBN+Xjcteh0zdk01SVqV55d/m62NJLJdIyb4y/WO5U=
+go.opentelemetry.io/otel v1.32.0/go.mod h1:00DCVSB0RQcnzlwyTfqtxSm+DRr9hpYrHjNGiBHVQIg=
+go.opentelemetry.io/otel/metric v1.32.0 h1:xV2umtmNcThh2/a/aCP+h64Xx5wsj8qqnkYZktzNa0M=
+go.opentelemetry.io/otel/metric v1.32.0/go.mod h1:jH7CIbbK6SH2V2wE16W05BHCtIDzauciCRLoc/SyMv8=
+go.opentelemetry.io/otel/sdk v1.32.0 h1:RNxepc9vK59A8XsgZQouW8ue8Gkb4jpWtJm9ge5lEG4=
+go.opentelemetry.io/otel/sdk v1.32.0/go.mod h1:LqgegDBjKMmb2GC6/PrTnteJG39I8/vJCAP9LlJXEjU=
+go.opentelemetry.io/otel/sdk/metric v1.32.0 h1:rZvFnvmvawYb0alrYkjraqJq0Z4ZUJAiyYCU9snn1CU=
+go.opentelemetry.io/otel/sdk/metric v1.32.0/go.mod h1:PWeZlq0zt9YkYAp3gjKZ0eicRYvOh1Gd+X99x6GHpCQ=
+go.opentelemetry.io/otel/trace v1.32.0 h1:WIC9mYrXf8TmY/EXuULKc8hR17vE+Hjv2cssQDe03fM=
+go.opentelemetry.io/otel/trace v1.32.0/go.mod h1:+i4rkvCraA+tG6AzwloGaCtkx53Fa+L+V8e9a7YvhT8=
+go.unistack.org/micro-proto/v4 v4.1.0 h1:qPwL2n/oqh9RE3RTTDgt28XK3QzV597VugQPaw9lKUk=
+go.unistack.org/micro-proto/v4 v4.1.0/go.mod h1:ArmK7o+uFvxSY3dbJhKBBX4Pm1rhWdLEFf3LxBrMtec=
+go.unistack.org/micro/v4 v4.1.2 h1:9SOlPYyPNNFpg1A7BsvhDyQm3gysLH1AhWbDCp1hyoY=
+go.unistack.org/micro/v4 v4.1.2/go.mod h1:lr3oYED8Ay1vjK68QqRw30QOtdk/ffpZqMFDasOUhKw=
+golang.org/x/net v0.35.0 h1:T5GQRQb2y08kTAByq9L4/bz8cipCdA8FbRTXewonqY8=
+golang.org/x/net v0.35.0/go.mod h1:EglIi67kWsHKlRzzVMUD93VMSWGFOMSZgxFjparz1Qk=
+golang.org/x/sys v0.30.0 h1:QjkSwP/36a20jFYWkSue1YwXzLmsV5Gfq7Eiy72C1uc=
+golang.org/x/sys v0.30.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/text v0.22.0 h1:bofq7m3/HAFvbF51jz3Q9wLg3jkvSPuiZu/pD1XwgtM=
+golang.org/x/text v0.22.0/go.mod h1:YRoo4H8PVmsu+E3Ou7cqLVH8oXWIHVoX0jqUWALQhfY=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20250224174004-546df14abb99 h1:ZSlhAUqC4r8TPzqLXQ0m3upBNZeF+Y8jQ3c4CR3Ujms=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20250224174004-546df14abb99/go.mod h1:LuRYeWDFV6WOn90g357N17oMCaxpgCnbi/44qJvDn2I=
+google.golang.org/grpc v1.70.0 h1:pWFv03aZoHzlRKHWicjsZytKAiYCtNS0dHbXnIdq7jQ=
+google.golang.org/grpc v1.70.0/go.mod h1:ofIJqVKDXx/JiXrwr2IG4/zwdH9txy3IlF40RmcJSQw=
+google.golang.org/protobuf v1.36.5 h1:tPhr+woSbjfYvY6/GPufUoYizxw1cF/yFoxJ2fmpwlM=
+google.golang.org/protobuf v1.36.5/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
-honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

grpc.go

@@ -1,4 +1,4 @@
-// Package grpc provides a gRPC client
+// Package grpc provides a gRPC client for micro framework
 package grpc
 
 import (
@@ -7,30 +7,39 @@ import (
 	"fmt"
 	"net"
 	"reflect"
+	"strconv"
 	"strings"
 	"sync"
 	"time"
 
-	"github.com/unistack-org/micro/v3/broker"
-	"github.com/unistack-org/micro/v3/client"
-	"github.com/unistack-org/micro/v3/codec"
-	"github.com/unistack-org/micro/v3/errors"
-	"github.com/unistack-org/micro/v3/metadata"
+	"go.unistack.org/micro/v4/client"
+	"go.unistack.org/micro/v4/codec"
+	"go.unistack.org/micro/v4/errors"
+	"go.unistack.org/micro/v4/metadata"
+	"go.unistack.org/micro/v4/options"
+	"go.unistack.org/micro/v4/selector"
+	"go.unistack.org/micro/v4/semconv"
+	"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 (
-	defaultContentType = "application/grpc+proto"
+	DefaultContentType = "application/grpc"
 )
 
 type grpcClient struct {
-	opts client.Options
-	pool *pool
-	init bool
+	funcCall   client.FuncCall
+	funcStream client.FuncStream
+	pool       *ConnPool
+	opts       client.Options
 	sync.RWMutex
+	init bool
 }
 
 // secure returns the dial option for whether its a secure or insecure connection
@@ -61,36 +70,37 @@ func (g *grpcClient) secure(addr string) grpc.DialOption {
 	}
 
 	// other fallback to insecure
-	return grpc.WithInsecure()
+	return grpc.WithTransportCredentials(insecure.NewCredentials())
 }
 
 func (g *grpcClient) call(ctx context.Context, addr string, req client.Request, rsp interface{}, opts client.CallOptions) error {
-	var header map[string]string
+	var header map[string][]string
 
 	if md, ok := metadata.FromOutgoingContext(ctx); ok {
-		header = make(map[string]string, len(md))
-		for k, v := range md {
-			header[strings.ToLower(k)] = v
-		}
+		header = metadata.Copy(md)
 	} else {
-		header = make(map[string]string, 2)
+		header = make(map[string][]string, 2)
+	}
+	if opts.RequestMetadata != nil {
+		for k, v := range opts.RequestMetadata {
+			header[k] = v
+		}
 	}
-
 	// set timeout in nanoseconds
-	header["timeout"] = fmt.Sprintf("%d", opts.RequestTimeout)
-	// set the content type for the request
-	header["x-content-type"] = req.ContentType()
+	header["grpc-timeout"] = append(header["grpc-timeout"], fmt.Sprintf("%dn", opts.RequestTimeout))
+	header["timeout"] = append(header["timeout"], fmt.Sprintf("%dn", opts.RequestTimeout))
+	header["content-type"] = append(header["content-type"], req.ContentType())
 
-	md := gmetadata.New(header)
-	ctx = gmetadata.NewOutgoingContext(ctx, md)
+	ctx = gmetadata.NewOutgoingContext(ctx, header)
 
 	cf, err := g.newCodec(req.ContentType())
 	if err != nil {
-		return errors.InternalServerError("go.micro.client", err.Error())
+		return errors.InternalServerError("go.micro.client", "%+v", err)
 	}
 
 	maxRecvMsgSize := g.maxRecvMsgSizeValue()
 	maxSendMsgSize := g.maxSendMsgSizeValue()
+	cfgService := g.serviceConfig()
 
 	var grr error
 
@@ -109,31 +119,50 @@ func (g *grpcClient) call(ctx context.Context, addr string, req client.Request,
 			grpc.MaxCallRecvMsgSize(maxRecvMsgSize),
 			grpc.MaxCallSendMsgSize(maxSendMsgSize),
 		),
+		grpc.WithDefaultServiceConfig(cfgService),
 	}
 
-	if opts := g.getGrpcDialOptions(); opts != nil {
+	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...)
 	}
 
-	cc, err := g.pool.getConn(dialCtx, addr, grpcDialOptions...)
+	contextDialer := g.opts.ContextDialer
+	if opts.ContextDialer != nil {
+		contextDialer = opts.ContextDialer
+	}
+	if contextDialer != nil {
+		grpcDialOptions = append(grpcDialOptions, grpc.WithContextDialer(contextDialer))
+	}
+
+	cc, err := g.pool.Get(dialCtx, addr, grpcDialOptions...)
 	if err != nil {
-		return errors.InternalServerError("go.micro.client", fmt.Sprintf("Error sending request: %v", err))
+		return errors.InternalServerError("go.micro.client", "Error sending request: %v", err)
 	}
 	defer func() {
 		// defer execution of release
-		g.pool.release(cc, grr)
+		g.pool.Put(cc, grr)
 	}()
 
 	ch := make(chan error, 1)
+	var gmd gmetadata.MD
+
+	grpcCallOptions := []grpc.CallOption{
+		grpc.CallContentSubtype((&wrapMicroCodec{cf}).Name()),
+	}
+
+	if opts := g.getGrpcCallOptions(opts.Context); opts != nil {
+		grpcCallOptions = append(grpcCallOptions, opts...)
+	}
+
+	if opts.ResponseMetadata != nil {
+		gmd = gmetadata.MD{}
+		grpcCallOptions = append(grpcCallOptions, grpc.Header(&gmd))
+	}
 
 	go func() {
-		grpcCallOptions := []grpc.CallOption{
-			grpc.ForceCodec(&wrapMicroCodec{cf}),
-			grpc.CallContentSubtype((&wrapMicroCodec{cf}).Name()),
-		}
-		if opts := g.getGrpcCallOptions(); opts != nil {
-			grpcCallOptions = append(grpcCallOptions, opts...)
-		}
 		err := cc.Invoke(ctx, methodToGRPC(req.Service(), req.Endpoint()), req.Body(), rsp, grpcCallOptions...)
 		ch <- microError(err)
 	}()
@@ -145,34 +174,38 @@ func (g *grpcClient) call(ctx context.Context, addr string, req client.Request,
 		grr = errors.Timeout("go.micro.client", "%v", ctx.Err())
 	}
 
+	if opts.ResponseMetadata != nil {
+		*opts.ResponseMetadata = metadata.New(gmd.Len())
+		for k, v := range gmd {
+			opts.ResponseMetadata.Append(k, v...)
+		}
+	}
+
 	return grr
 }
 
 func (g *grpcClient) stream(ctx context.Context, addr string, req client.Request, rsp interface{}, opts client.CallOptions) error {
-	var header map[string]string
+	var header map[string][]string
 
 	if md, ok := metadata.FromOutgoingContext(ctx); ok {
-		header = make(map[string]string, len(md))
-		for k, v := range md {
-			header[k] = v
-		}
+		header = metadata.Copy(md)
 	} else {
-		header = make(map[string]string)
+		header = make(map[string][]string)
 	}
 
 	// set timeout in nanoseconds
 	if opts.StreamTimeout > time.Duration(0) {
-		header["timeout"] = fmt.Sprintf("%d", opts.StreamTimeout)
+		header["grpc-timeout"] = append(header["grpc-timeout"], fmt.Sprintf("%dn", opts.RequestTimeout))
+		header["timeout"] = append(header["timeout"], fmt.Sprintf("%dn", opts.RequestTimeout))
 	}
 	// set the content type for the request
-	header["x-content-type"] = req.ContentType()
+	header["content-type"] = append(header["content-type"], req.ContentType())
 
-	md := gmetadata.New(header)
-	ctx = gmetadata.NewOutgoingContext(ctx, md)
+	ctx = gmetadata.NewOutgoingContext(ctx, header)
 
 	cf, err := g.newCodec(req.ContentType())
 	if err != nil {
-		return errors.InternalServerError("go.micro.client", err.Error())
+		return errors.InternalServerError("go.micro.client", "%+v", err)
 	}
 
 	var dialCtx context.Context
@@ -186,17 +219,34 @@ func (g *grpcClient) stream(ctx context.Context, addr string, req client.Request
 
 	wc := &wrapMicroCodec{cf}
 
+	maxRecvMsgSize := g.maxRecvMsgSizeValue()
+	maxSendMsgSize := g.maxSendMsgSizeValue()
+	cfgService := g.serviceConfig()
+
 	grpcDialOptions := []grpc.DialOption{
 		g.secure(addr),
+		grpc.WithDefaultCallOptions(
+			grpc.MaxCallRecvMsgSize(maxRecvMsgSize),
+			grpc.MaxCallSendMsgSize(maxSendMsgSize),
+		),
+		grpc.WithDefaultServiceConfig(cfgService),
 	}
 
-	if opts := g.getGrpcDialOptions(); opts != nil {
+	if opts := g.getGrpcDialOptions(opts.Context); opts != nil {
 		grpcDialOptions = append(grpcDialOptions, opts...)
 	}
 
-	cc, err := g.pool.getConn(dialCtx, addr, grpcDialOptions...)
+	contextDialer := g.opts.ContextDialer
+	if opts.ContextDialer != nil {
+		contextDialer = opts.ContextDialer
+	}
+	if contextDialer != nil {
+		grpcDialOptions = append(grpcDialOptions, grpc.WithContextDialer(contextDialer))
+	}
+
+	cc, err := g.pool.Get(dialCtx, addr, grpcDialOptions...)
 	if err != nil {
-		return errors.InternalServerError("go.micro.client", fmt.Sprintf("Error sending request: %v", err))
+		return errors.InternalServerError("go.micro.client", "Error sending request: %v", err)
 	}
 
 	desc := &grpc.StreamDesc{
@@ -206,12 +256,17 @@ func (g *grpcClient) stream(ctx context.Context, addr string, req client.Request
 	}
 
 	grpcCallOptions := []grpc.CallOption{
-		grpc.ForceCodec(wc),
+		// grpc.ForceCodec(wc),
 		grpc.CallContentSubtype(wc.Name()),
 	}
-	if opts := g.getGrpcCallOptions(); opts != nil {
+	if opts := g.getGrpcCallOptions(opts.Context); opts != nil {
 		grpcCallOptions = append(grpcCallOptions, opts...)
 	}
+	var gmd gmetadata.MD
+	if opts.ResponseMetadata != nil {
+		gmd = gmetadata.MD{}
+		grpcCallOptions = append(grpcCallOptions, grpc.Header(&gmd))
+	}
 
 	// create a new cancelling context
 	newCtx, cancel := context.WithCancel(ctx)
@@ -222,9 +277,9 @@ func (g *grpcClient) stream(ctx context.Context, addr string, req client.Request
 		// cancel the context
 		cancel()
 		// release the connection
-		g.pool.release(cc, err)
+		g.pool.Put(cc, err)
 		// now return the error
-		return errors.InternalServerError("go.micro.client", fmt.Sprintf("Error creating stream: %v", err))
+		return errors.InternalServerError("go.micro.client", "Error creating stream: %v", err)
 	}
 
 	// set request codec
@@ -250,13 +305,14 @@ func (g *grpcClient) stream(ctx context.Context, addr string, req client.Request
 			}
 
 			// defer execution of release
-			g.pool.release(cc, err)
+			g.pool.Put(cc, err)
 		},
 	}
 
 	// set the stream as the response
 	val := reflect.ValueOf(rsp).Elem()
 	val.Set(reflect.ValueOf(stream).Elem())
+
 	return nil
 }
 
@@ -318,6 +374,17 @@ func (g *grpcClient) newCodec(ct string) (codec.Codec, error) {
 	return nil, codec.ErrUnknownContentType
 }
 
+func (g *grpcClient) serviceConfig() string {
+	if g.opts.Context == nil {
+		return DefaultServiceConfig
+	}
+	v := g.opts.Context.Value(serviceConfigKey{})
+	if v == nil {
+		return DefaultServiceConfig
+	}
+	return v.(string)
+}
+
 func (g *grpcClient) Init(opts ...client.Option) error {
 	if len(opts) == 0 && g.init {
 		return nil
@@ -337,25 +404,17 @@ func (g *grpcClient) Init(opts ...client.Option) error {
 		g.pool.Unlock()
 	}
 
-	if err := g.opts.Broker.Init(); err != nil {
-		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.funcCall = g.fnCall
+	g.funcStream = g.fnStream
 
+	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
@@ -365,10 +424,6 @@ 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...)
 }
@@ -379,8 +434,35 @@ 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
+
 	for _, opt := range opts {
 		opt(&callOpts)
 	}
@@ -409,11 +491,6 @@ func (g *grpcClient) Call(ctx context.Context, req client.Request, rsp interface
 	// 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
@@ -429,25 +506,13 @@ func (g *grpcClient) Call(ctx context.Context, req client.Request, rsp interface
 		callOpts.Address = []string{g.opts.Proxy}
 	}
 
-	// lookup the route to send the reques to
-	// TODO apply any filtering here
-	routes, err := g.opts.Lookup(ctx, req, callOpts)
-	if err != nil {
-		return errors.InternalServerError("go.micro.client", err.Error())
-	}
+	var next selector.Next
 
-	// balance the list of nodes
-	next, err := callOpts.Selector.Select(routes)
-	if err != nil {
-		return err
-	}
-
-	// return errors.New("go.micro.client", "request timeout", 408)
 	call := func(i int) error {
 		// 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", err.Error())
+			return errors.InternalServerError("go.micro.client", "%+v", err)
 		}
 
 		// only sleep if greater than 0
@@ -455,6 +520,23 @@ func (g *grpcClient) Call(ctx context.Context, req client.Request, rsp interface
 			time.Sleep(t)
 		}
 
+		if next == nil {
+			var routes []string
+
+			// lookup the route to send the reques to
+			// TODO apply any filtering here
+			routes, err = g.opts.Lookup(ctx, req, callOpts)
+			if err != nil {
+				return errors.InternalServerError("go.micro.client", "%+v", err)
+			}
+
+			// balance the list of nodes
+			next, err = callOpts.Selector.Select(routes)
+			if err != nil {
+				return err
+			}
+		}
+
 		// get the next node
 		node := next()
 
@@ -508,6 +590,31 @@ func (g *grpcClient) Call(ctx context.Context, req client.Request, rsp interface
 }
 
 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 {
@@ -526,11 +633,6 @@ func (g *grpcClient) Stream(ctx context.Context, req client.Request, opts ...cli
 	// 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
@@ -546,24 +648,13 @@ func (g *grpcClient) Stream(ctx context.Context, req client.Request, opts ...cli
 		callOpts.Address = []string{g.opts.Proxy}
 	}
 
-	// lookup the route to send the reques to
-	// TODO: move to internal lookup func
-	routes, err := g.opts.Lookup(ctx, req, callOpts)
-	if err != nil {
-		return nil, errors.InternalServerError("go.micro.client", err.Error())
-	}
-
-	// balance the list of nodes
-	next, err := callOpts.Selector.Select(routes)
-	if err != nil {
-		return nil, err
-	}
+	var next selector.Next
 
 	call := func(i int) (client.Stream, error) {
 		// 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", err.Error())
+			return nil, errors.InternalServerError("go.micro.client", "%+v", err)
 		}
 
 		// only sleep if greater than 0
@@ -571,6 +662,23 @@ func (g *grpcClient) Stream(ctx context.Context, req client.Request, opts ...cli
 			time.Sleep(t)
 		}
 
+		if next == nil {
+			var routes []string
+
+			// lookup the route to send the reques to
+			// 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)
+			}
+
+			// balance the list of nodes
+			next, err = callOpts.Selector.Select(routes)
+			if err != nil {
+				return nil, err
+			}
+		}
+
 		// get the next node
 		node := next()
 
@@ -634,48 +742,6 @@ func (g *grpcClient) Stream(ctx context.Context, req client.Request, opts ...cli
 	return nil, grr
 }
 
-func (g *grpcClient) Publish(ctx context.Context, p client.Message, opts ...client.PublishOption) error {
-	var body []byte
-
-	options := client.NewPublishOptions(opts...)
-
-	md, ok := metadata.FromOutgoingContext(ctx)
-	if !ok {
-		md = metadata.New(2)
-	}
-	md["Content-Type"] = p.ContentType()
-	md["Micro-Topic"] = p.Topic()
-
-	// 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()
-
-	// get the exchange
-	if len(options.Exchange) > 0 {
-		topic = options.Exchange
-	}
-
-	return g.opts.Broker.Publish(metadata.NewOutgoingContext(ctx, md), topic, &broker.Message{
-		Header: md,
-		Body:   body,
-	}, broker.PublishContext(options.Context))
-}
-
 func (g *grpcClient) String() string {
 	return "grpc"
 }
@@ -684,41 +750,45 @@ func (g *grpcClient) Name() string {
 	return g.opts.Name
 }
 
-func (g *grpcClient) getGrpcDialOptions() []grpc.DialOption {
-	if g.opts.CallOptions.Context == nil {
-		return nil
+func (g *grpcClient) getGrpcDialOptions(ctx context.Context) []grpc.DialOption {
+	var opts []grpc.DialOption
+
+	if g.opts.CallOptions.Context != nil {
+		if v := g.opts.CallOptions.Context.Value(grpcDialOptions{}); v != nil {
+			if vopts, ok := v.([]grpc.DialOption); ok {
+				opts = append(opts, vopts...)
+			}
+		}
 	}
 
-	v := g.opts.CallOptions.Context.Value(grpcDialOptions{})
-
-	if v == nil {
-		return nil
-	}
-
-	opts, ok := v.([]grpc.DialOption)
-
-	if !ok {
-		return nil
+	if ctx != nil {
+		if v := ctx.Value(grpcDialOptions{}); v != nil {
+			if vopts, ok := v.([]grpc.DialOption); ok {
+				opts = append(opts, vopts...)
+			}
+		}
 	}
 
 	return opts
 }
 
-func (g *grpcClient) getGrpcCallOptions() []grpc.CallOption {
-	if g.opts.CallOptions.Context == nil {
-		return nil
+func (g *grpcClient) getGrpcCallOptions(ctx context.Context) []grpc.CallOption {
+	var opts []grpc.CallOption
+
+	if g.opts.CallOptions.Context != nil {
+		if v := g.opts.CallOptions.Context.Value(grpcCallOptions{}); v != nil {
+			if vopts, ok := v.([]grpc.CallOption); ok {
+				opts = append(opts, vopts...)
+			}
+		}
 	}
 
-	v := g.opts.CallOptions.Context.Value(grpcCallOptions{})
-
-	if v == nil {
-		return nil
-	}
-
-	opts, ok := v.([]grpc.CallOption)
-
-	if !ok {
-		return nil
+	if ctx != nil {
+		if v := ctx.Value(grpcCallOptions{}); v != nil {
+			if vopts, ok := v.([]grpc.CallOption); ok {
+				opts = append(opts, vopts...)
+			}
+		}
 	}
 
 	return opts
@@ -727,25 +797,20 @@ func (g *grpcClient) getGrpcCallOptions() []grpc.CallOption {
 func NewClient(opts ...client.Option) client.Client {
 	options := client.NewOptions(opts...)
 	// default content type for grpc
-	options.ContentType = defaultContentType
+	if options.ContentType == "" {
+		options.ContentType = DefaultContentType
+	}
 
-	rc := &grpcClient{
+	c := &grpcClient{
 		opts: options,
 	}
 
-	rc.pool = newPool(options.PoolSize, options.PoolTTL, rc.poolMaxIdle(), rc.poolMaxStreams())
+	c.pool = NewConnPool(options.PoolSize, options.PoolTTL, c.poolMaxIdle(), c.poolMaxStreams())
 
-	c := client.Client(rc)
-
-	// wrap in reverse
-	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 {
+	if c.opts.Context != nil {
+		if codecs, ok := c.opts.Context.Value(codecsKey{}).(map[string]encoding.Codec); ok && codecs != nil {
 			for k, v := range codecs {
-				rc.opts.Codecs[k] = &wrapGrpcCodec{v}
+				c.opts.Codecs[k] = &wrapGrpcCodec{v}
 			}
 		}
 	}
@@ -754,5 +819,8 @@ func NewClient(opts ...client.Option) client.Client {
 		encoding.RegisterCodec(&wrapMicroCodec{k})
 	}
 
+	c.funcCall = c.fnCall
+	c.funcStream = c.fnStream
+
 	return c
 }

grpc_pool.go

@@ -2,6 +2,7 @@ package grpc
 
 import (
 	"context"
+	"strings"
 	"sync"
 	"time"
 
@@ -9,7 +10,7 @@ import (
 	"google.golang.org/grpc/connectivity"
 )
 
-type pool struct {
+type ConnPool struct {
 	conns      map[string]*streamsPool
 	size       int
 	ttl        int64
@@ -20,36 +21,36 @@ type pool struct {
 
 type streamsPool struct {
 	//  head of list
-	head *poolConn
+	head *PoolConn
 	//  busy conns list
-	busy *poolConn
+	busy *PoolConn
 	//  the siza of list
 	count int
 	//  idle conn
 	idle int
 }
 
-type poolConn struct {
+type PoolConn struct {
 	err error
 	*grpc.ClientConn
-	next    *poolConn
-	pool    *pool
+	next    *PoolConn
+	pool    *ConnPool
 	sp      *streamsPool
-	pre     *poolConn
+	pre     *PoolConn
 	addr    string
 	streams int
 	created int64
 	in      bool
 }
 
-func newPool(size int, ttl time.Duration, idle int, ms int) *pool {
+func NewConnPool(size int, ttl time.Duration, idle int, ms int) *ConnPool {
 	if ms <= 0 {
 		ms = 1
 	}
 	if idle < 0 {
 		idle = 0
 	}
-	return &pool{
+	return &ConnPool{
 		size:       size,
 		ttl:        int64(ttl.Seconds()),
 		maxStreams: ms,
@@ -58,12 +59,15 @@ func newPool(size int, ttl time.Duration, idle int, ms int) *pool {
 	}
 }
 
-func (p *pool) getConn(ctx context.Context, addr string, opts ...grpc.DialOption) (*poolConn, error) {
+func (p *ConnPool) Get(ctx context.Context, addr string, opts ...grpc.DialOption) (*PoolConn, error) {
+	if strings.HasPrefix(addr, "http") {
+		addr = addr[strings.Index(addr, ":")+3:]
+	}
 	now := time.Now().Unix()
 	p.Lock()
 	sp, ok := p.conns[addr]
 	if !ok {
-		sp = &streamsPool{head: &poolConn{}, busy: &poolConn{}, count: 0, idle: 0}
+		sp = &streamsPool{head: &PoolConn{}, busy: &PoolConn{}, count: 0, idle: 0}
 		p.conns[addr] = sp
 	}
 	//  while we have conns check streams and then return one
@@ -126,12 +130,12 @@ func (p *pool) getConn(ctx context.Context, addr string, opts ...grpc.DialOption
 	}
 	p.Unlock()
 
-	//  create new conn
+	// nolint (TODO need fix)  create new conn)
 	cc, err := grpc.DialContext(ctx, addr, opts...)
 	if err != nil {
 		return nil, err
 	}
-	conn = &poolConn{ClientConn: cc, err: nil, addr: addr, pool: p, sp: sp, streams: 1, created: time.Now().Unix(), pre: nil, next: nil, in: false}
+	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.Lock()
@@ -143,7 +147,7 @@ func (p *pool) getConn(ctx context.Context, addr string, opts ...grpc.DialOption
 	return conn, nil
 }
 
-func (p *pool) release(conn *poolConn, err error) {
+func (p *ConnPool) Put(conn *PoolConn, err error) {
 	p.Lock()
 	p, sp, created := conn.pool, conn.sp, conn.created
 	//  try to add conn
@@ -178,11 +182,11 @@ func (p *pool) release(conn *poolConn, err error) {
 	p.Unlock()
 }
 
-func (conn *poolConn) Close() {
-	conn.pool.release(conn, conn.err)
+func (conn *PoolConn) Close() {
+	conn.pool.Put(conn, conn.err)
 }
 
-func removeConn(conn *poolConn) {
+func removeConn(conn *PoolConn) {
 	if conn.pre != nil {
 		conn.pre.next = conn.next
 	}
@@ -195,7 +199,7 @@ func removeConn(conn *poolConn) {
 	conn.sp.count--
 }
 
-func addConnAfter(conn *poolConn, after *poolConn) {
+func addConnAfter(conn *PoolConn, after *PoolConn) {
 	conn.next = after.next
 	conn.pre = after
 	if after.next != nil {

message.go

@@ -1,40 +0,0 @@
-package grpc
-
-import (
-	"github.com/unistack-org/micro/v3/client"
-)
-
-type grpcEvent struct {
-	payload     interface{}
-	topic       string
-	contentType string
-}
-
-func newGRPCEvent(topic string, payload interface{}, contentType string, opts ...client.MessageOption) client.Message {
-	var options client.MessageOptions
-	for _, o := range opts {
-		o(&options)
-	}
-
-	if len(options.ContentType) > 0 {
-		contentType = options.ContentType
-	}
-
-	return &grpcEvent{
-		payload:     payload,
-		topic:       topic,
-		contentType: contentType,
-	}
-}
-
-func (g *grpcEvent) ContentType() string {
-	return g.contentType
-}
-
-func (g *grpcEvent) Topic() string {
-	return g.topic
-}
-
-func (g *grpcEvent) Payload() interface{} {
-	return g.payload
-}

options.go

@@ -4,13 +4,13 @@ package grpc
 import (
 	"context"
 
-	"github.com/unistack-org/micro/v3/client"
+	"go.unistack.org/micro/v4/client"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/encoding"
 )
 
 var (
-	// DefaultPoolMaxStreams maximum streams on a connectioin
+	// DefaultPoolMaxStreams maximum streams on a connection
 	// (20)
 	DefaultPoolMaxStreams = 20
 
@@ -25,6 +25,9 @@ var (
 	// DefaultMaxSendMsgSize maximum message that client can send
 	// (4 MB).
 	DefaultMaxSendMsgSize = 1024 * 1024 * 4
+
+	// DefaultServiceConfig enable load balancing
+	DefaultServiceConfig = `{"loadBalancingPolicy":"round_robin"}`
 )
 
 type poolMaxStreams struct{}
@@ -70,9 +73,7 @@ func Codec(contentType string, c encoding.Codec) client.Option {
 
 type maxRecvMsgSizeKey struct{}
 
-//
 // MaxRecvMsgSize set the maximum size of message that client can receive.
-//
 func MaxRecvMsgSize(s int) client.Option {
 	return func(o *client.Options) {
 		if o.Context == nil {
@@ -84,9 +85,7 @@ func MaxRecvMsgSize(s int) client.Option {
 
 type maxSendMsgSizeKey struct{}
 
-//
 // MaxSendMsgSize set the maximum size of message that client can send.
-//
 func MaxSendMsgSize(s int) client.Option {
 	return func(o *client.Options) {
 		if o.Context == nil {
@@ -98,11 +97,9 @@ func MaxSendMsgSize(s int) client.Option {
 
 type grpcDialOptions struct{}
 
-//
 // DialOptions to be used to configure gRPC dial options
-//
-func DialOptions(opts ...grpc.DialOption) client.CallOption {
-	return func(o *client.CallOptions) {
+func DialOptions(opts ...grpc.DialOption) client.Option {
+	return func(o *client.Options) {
 		if o.Context == nil {
 			o.Context = context.Background()
 		}
@@ -112,9 +109,7 @@ func DialOptions(opts ...grpc.DialOption) client.CallOption {
 
 type grpcCallOptions struct{}
 
-//
 // CallOptions to be used to configure gRPC call options
-//
 func CallOptions(opts ...grpc.CallOption) client.CallOption {
 	return func(o *client.CallOptions) {
 		if o.Context == nil {
@@ -123,3 +118,14 @@ func CallOptions(opts ...grpc.CallOption) client.CallOption {
 		o.Context = context.WithValue(o.Context, grpcCallOptions{}, opts)
 	}
 }
+
+type serviceConfigKey struct{}
+
+func ServiceConfig(str string) client.CallOption {
+	return func(options *client.CallOptions) {
+		if options.Context == nil {
+			options.Context = context.Background()
+		}
+		options.Context = context.WithValue(options.Context, serviceConfigKey{}, str)
+	}
+}

request.go

@@ -4,8 +4,8 @@ import (
 	"fmt"
 	"strings"
 
-	"github.com/unistack-org/micro/v3/client"
-	"github.com/unistack-org/micro/v3/codec"
+	"go.unistack.org/micro/v4/client"
+	"go.unistack.org/micro/v4/codec"
 )
 
 type grpcRequest struct {
@@ -38,15 +38,12 @@ func methodToGRPC(service, method string) string {
 	return fmt.Sprintf("/%s.%s/%s", service, mParts[0], mParts[1])
 }
 
-func newGRPCRequest(service, method string, request interface{}, contentType string, reqOpts ...client.RequestOption) client.Request {
-	var opts client.RequestOptions
-	for _, o := range reqOpts {
-		o(&opts)
-	}
+func newGRPCRequest(service, method string, request interface{}, contentType string, opts ...client.RequestOption) client.Request {
+	options := client.NewRequestOptions(opts...)
 
 	// set the content-type specified
-	if len(opts.ContentType) > 0 {
-		contentType = opts.ContentType
+	if len(options.ContentType) > 0 {
+		contentType = options.ContentType
 	}
 
 	return &grpcRequest{
@@ -54,7 +51,7 @@ func newGRPCRequest(service, method string, request interface{}, contentType str
 		method:      method,
 		request:     request,
 		contentType: contentType,
-		opts:        opts,
+		opts:        options,
 	}
 }
 

response.go

@@ -1,15 +1,13 @@
 package grpc
 
 import (
-	"strings"
-
-	"github.com/unistack-org/micro/v3/codec"
-	"github.com/unistack-org/micro/v3/metadata"
+	"go.unistack.org/micro/v4/codec"
+	"go.unistack.org/micro/v4/metadata"
 	"google.golang.org/grpc"
 )
 
 type response struct {
-	conn   *poolConn
+	conn   *PoolConn
 	stream grpc.ClientStream
 	codec  codec.Codec
 }
@@ -23,20 +21,21 @@ func (r *response) Codec() codec.Codec {
 func (r *response) Header() metadata.Metadata {
 	meta, err := r.stream.Header()
 	if err != nil {
-		return metadata.New(0)
+		return nil
 	}
-	md := metadata.New(len(meta))
-	for k, v := range meta {
-		md.Set(k, strings.Join(v, ","))
-	}
-	return md
+
+	return metadata.Metadata(meta.Copy())
 }
 
 // Read the undecoded response
 func (r *response) Read() ([]byte, error) {
 	f := &codec.Frame{}
-	if err := r.codec.ReadBody(&wrapStream{r.stream}, f); err != nil {
+	wrap := &wrapStream{r.stream}
+
+	_, err := wrap.Read(f.Data)
+	if err != nil {
 		return nil, err
 	}
+
 	return f.Data, nil
 }

stream.go

@@ -5,7 +5,8 @@ import (
 	"io"
 	"sync"
 
-	"github.com/unistack-org/micro/v3/client"
+	"go.unistack.org/micro/v4/client"
+	"go.unistack.org/micro/v4/tracer"
 	"google.golang.org/grpc"
 )
 
@@ -17,7 +18,7 @@ type grpcStream struct {
 	request  client.Request
 	response client.Response
 	close    func(err error)
-	conn     *poolConn
+	conn     *PoolConn
 	sync.RWMutex
 	closed bool
 }
@@ -42,6 +43,14 @@ func (g *grpcStream) Send(msg interface{}) error {
 	return nil
 }
 
+func (g *grpcStream) SendMsg(msg interface{}) error {
+	if err := g.ClientStream.SendMsg(msg); err != nil {
+		g.setError(err)
+		return err
+	}
+	return nil
+}
+
 func (g *grpcStream) Recv(msg interface{}) (err error) {
 	defer g.setError(err)
 
@@ -60,6 +69,24 @@ func (g *grpcStream) Recv(msg interface{}) (err error) {
 	return
 }
 
+func (g *grpcStream) RecvMsg(msg interface{}) (err error) {
+	defer g.setError(err)
+
+	if err = g.ClientStream.RecvMsg(msg); err != nil {
+		// #202 - inconsistent gRPC stream behavior
+		// the only way to tell if the stream is done is when we get a EOF on the Recv
+		// here we should close the underlying gRPC ClientConn
+		closeErr := g.Close()
+		if err == io.EOF && closeErr != nil {
+			err = closeErr
+		}
+
+		return err
+	}
+
+	return
+}
+
 func (g *grpcStream) Error() error {
 	g.RLock()
 	defer g.RUnlock()
@@ -85,6 +112,26 @@ func (g *grpcStream) Close() error {
 		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)
+	return g.ClientStream.CloseSend()
+}
+
+func (g *grpcStream) CloseSend() error {
+	g.Lock()
+	defer g.Unlock()
+
+	if g.closed {
+		return nil
+	}
+
 	// close the connection
 	g.closed = true
 	g.close(g.err)