improve meter

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

.github/dependabot.yml

@@ -0,0 +1,19 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://help.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+
+  # Maintain dependencies for GitHub Actions
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"
+
+  # Maintain dependencies for Golang
+  - package-ecosystem: "gomod"
+    directory: "/"
+    schedule:
+      interval: "daily"

.github/renovate.json

@@ -1,20 +0,0 @@
-{
-  "extends": [
-    "config:base"
-  ],
-  "postUpdateOptions": ["gomodTidy"],
-  "packageRules": [
-    {
-      "matchUpdateTypes": ["minor", "patch", "pin", "digest"],
-      "automerge": true
-    },
-    {
-      "groupName": "all deps",
-      "separateMajorMinor": true,
-      "groupSlug": "all",
-      "packagePatterns": [
-        "*"
-      ]
-    }
-  ]
-}

.github/stale.sh

@@ -1,13 +0,0 @@
-#!/bin/bash -ex
-
-export PATH=$PATH:$(pwd)/bin
-export GO111MODULE=on
-export GOBIN=$(pwd)/bin
-
-#go get github.com/rvflash/goup@v0.4.1
-
-#goup -v ./...
-#go get github.com/psampaz/go-mod-outdated@v0.6.0
-go list -u -m -mod=mod -json all | go-mod-outdated -update -direct -ci || true
-
-#go list -u -m -json all | go-mod-outdated -update

.github/workflows/autoapprove.yml

@@ -0,0 +1,20 @@
+name: "autoapprove"
+
+on:
+  pull_request_target:
+    types: [assigned, opened, synchronize, reopened]
+
+permissions:
+  pull-requests: write
+  contents: write
+
+jobs:
+  autoapprove:
+    runs-on: ubuntu-latest
+    steps:
+      - name: approve
+        uses: hmarr/auto-approve-action@v3
+        if: github.actor == 'vtolstov' || github.actor == 'dependabot[bot]'
+        id: approve
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/automerge.yml

@@ -0,0 +1,21 @@
+name: "automerge"
+
+on:
+  pull_request_target:
+    types: [assigned, opened, synchronize, reopened]
+
+permissions:
+  pull-requests: write
+  contents: write
+
+jobs:
+  automerge:
+    runs-on: ubuntu-latest
+    if: github.actor == 'vtolstov'
+    steps:
+      - name: merge
+        id: merge
+        run: gh pr merge --auto --merge "$PR_URL"
+        env:
+          PR_URL: ${{github.event.pull_request.html_url}}
+          GITHUB_TOKEN: ${{secrets.TOKEN}}

.github/workflows/build.yml

@@ -3,19 +3,20 @@ on:
  push:
     branches:
     - master
+    - v3
 jobs:
   test:
     name: test
     runs-on: ubuntu-latest
     steps:
     - name: setup
-      uses: actions/setup-go@v2
+      uses: actions/setup-go@v3
       with:
-        go-version: 1.16
+        go-version: 1.17
     - name: checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
     - name: cache
-      uses: actions/cache@v2
+      uses: actions/cache@v3
       with:
         path: ~/go/pkg/mod
         key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
@@ -31,9 +32,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: lint
-        uses: golangci/golangci-lint-action@v2
+        uses: golangci/golangci-lint-action@v3.4.0
         continue-on-error: true
         with:
           # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.

.github/workflows/codeql-analysis.yml

@@ -0,0 +1,78 @@
+# For most projects, this workflow file will not need changing; you simply need
+# to commit it to your repository.
+#
+# You may wish to alter this file to override the set of languages analyzed,
+# or to provide custom queries or build logic.
+#
+# ******** NOTE ********
+# We have attempted to detect the languages in your repository. Please check
+# the `language` matrix defined below to confirm you have the correct set of
+# supported CodeQL languages.
+#
+name: "codeql"
+
+on:
+  workflow_run:
+    workflows: ["prbuild"]
+    types:
+      - completed
+  push:
+    branches: [ master, v3 ]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [ master, v3 ]
+  schedule:
+    - cron: '34 1 * * 0'
+
+jobs:
+  analyze:
+    name: analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'go' ]
+        # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python' ]
+        # Learn more:
+        # https://docs.github.com/en/free-pro-team@latest/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning#changing-the-languages-that-are-analyzed
+
+    steps:
+    - name: checkout
+      uses: actions/checkout@v3
+    - name: setup
+      uses: actions/setup-go@v3
+      with:
+        go-version: 1.17
+    # Initializes the CodeQL tools for scanning.
+    - name: init
+      uses: github/codeql-action/init@v2
+      with:
+        languages: ${{ matrix.language }}
+        # If you wish to specify custom queries, you can do so here or in a config file.
+        # By default, queries listed here will override any specified in a config file.
+        # Prefix the list here with "+" to use these queries and those in the config file.
+        # queries: ./path/to/local/query, your-org/your-repo/queries@main
+
+    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
+    # If this step fails, then you should remove it and run the build manually (see below)
+    - name: autobuild
+      uses: github/codeql-action/autobuild@v2
+
+    # ℹ️ Command-line programs to run using the OS shell.
+    # 📚 https://git.io/JvXDl
+
+    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
+    #    and modify them (or add more) to build your code if your project
+    #    uses a compiled language
+
+    #- run: |
+    #   make bootstrap
+    #   make release
+
+    - name: analyze
+      uses: github/codeql-action/analyze@v2

.github/workflows/dependabot-automerge.yml

@@ -0,0 +1,27 @@
+name: "dependabot-automerge"
+
+on:
+  pull_request_target:
+    types: [assigned, opened, synchronize, reopened]
+
+permissions:
+  pull-requests: write
+  contents: write
+
+jobs:
+  automerge:
+    runs-on: ubuntu-latest
+    if: github.actor == 'dependabot[bot]'
+    steps:
+      - name: metadata
+        id: metadata
+        uses: dependabot/fetch-metadata@v1.3.6
+        with:
+          github-token: "${{ secrets.TOKEN }}"
+      - name: merge
+        id: merge
+        if: ${{contains(steps.metadata.outputs.dependency-names, 'go.unistack.org')}}
+        run: gh pr merge --auto --merge "$PR_URL"
+        env:
+          PR_URL: ${{github.event.pull_request.html_url}}
+          GITHUB_TOKEN: ${{secrets.TOKEN}}

.github/workflows/pr.yml

@@ -3,19 +3,20 @@ on:
   pull_request:
     branches:
     - master
+    - v3
 jobs:
   test:
     name: test
     runs-on: ubuntu-latest
     steps:
     - name: setup
-      uses: actions/setup-go@v2
+      uses: actions/setup-go@v3
       with:
-        go-version: 1.16
+        go-version: 1.17
     - name: checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
     - name: cache
-      uses: actions/cache@v2
+      uses: actions/cache@v3
       with:
         path: ~/go/pkg/mod
         key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
@@ -31,9 +32,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
       - name: lint
-        uses: golangci/golangci-lint-action@v2
+        uses: golangci/golangci-lint-action@v3.4.0
         continue-on-error: true
         with:
           # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.

.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

codec.go

@@ -3,30 +3,43 @@ package grpc
 import (
 	"io"
 
-	"github.com/unistack-org/micro/v3/codec"
+	"go.unistack.org/micro/v3/codec"
 	"google.golang.org/grpc/encoding"
 )
 
+var (
+	_ codec.Codec    = &wrapGrpcCodec{}
+	_ encoding.Codec = &wrapMicroCodec{}
+)
+
 type wrapMicroCodec struct{ codec.Codec }
 
 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
 	}

context.go

@@ -1,16 +0,0 @@
-package grpc
-
-import (
-	"context"
-
-	"github.com/unistack-org/micro/v3/server"
-)
-
-func setServerOption(k, v interface{}) server.Option {
-	return func(o *server.Options) {
-		if o.Context == nil {
-			o.Context = context.Background()
-		}
-		o.Context = context.WithValue(o.Context, k, v)
-	}
-}

error.go

@@ -6,7 +6,7 @@ import (
 	"net/http"
 	"os"
 
-	"github.com/unistack-org/micro/v3/errors"
+	"go.unistack.org/micro/v3/errors"
 	"google.golang.org/grpc/codes"
 )
 

generate.go

@@ -0,0 +1,4 @@
+package grpc
+
+//go:generate go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@latest
+//go:generate sh -c "protoc -I./proto -I$(go list -f '{{ .Dir }}' -m go.unistack.org/micro-proto/v3) -I. --go-grpc_out=paths=source_relative:./proto --go_out=paths=source_relative:./proto proto/test.proto"

go.mod

@@ -1,12 +1,17 @@
-module github.com/unistack-org/micro-server-grpc/v3
+module go.unistack.org/micro-server-grpc/v3
 
-go 1.16
+go 1.20
 
 require (
-	github.com/golang/protobuf v1.5.2
+	github.com/golang/protobuf v1.5.4
-	github.com/unistack-org/micro/v3 v3.3.16
+	go.unistack.org/micro/v3 v3.10.54
-	golang.org/x/net v0.0.0-20210423184538-5f58ad60dda6
+	golang.org/x/net v0.24.0
-	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
+	google.golang.org/grpc v1.63.0
-	google.golang.org/grpc v1.37.0
+	google.golang.org/protobuf v1.33.0
-	google.golang.org/protobuf v1.26.0
+)
+
+require (
+	golang.org/x/sys v0.19.0 // indirect
+	golang.org/x/text v0.14.0 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20240401170217-c3f982113cda // indirect
 )

go.sum

@@ -1,109 +1,48 @@
-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 v0.9.9-0.20210217033140-668b12f5399d/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
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-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 v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/text v0.3.6 h1:aRYxNxv6iGQlyVaZmk6ZgYEDa+Jg18DxebPSrd6bg1M=
-golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
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 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=
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-golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20231030173426-d783a09b4405/go.mod h1:67X1fPuzjcrkymZzZV1vvkFeTn2Rvc6lYF9MYFGCcwE=
-google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9YwlJXL52JkM=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20240314234333-6e1732d8331c h1:lfpJ/2rWPa/kJgxyyXM8PrNnfCzcmxJ265mADgwmvLI=
-google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20240314234333-6e1732d8331c/go.mod h1:WtryC6hu0hhx87FDGxWCDptyssuo68sk10vYjF+T9fY=
-google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
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-google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
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-google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
+google.golang.org/grpc v1.59.0/go.mod h1:aUPDwccQo6OTjy7Hct4AfBPD1GptF4fyUjIkQ9YtF98=
-google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
+google.golang.org/grpc v1.62.1 h1:B4n+nfKzOICUXMgyrNd19h/I9oH0L1pizfk1d4zSgTk=
-google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
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+google.golang.org/protobuf v1.33.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
-honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=

grpc.go

@@ -7,26 +7,30 @@ import (
 	"fmt"
 	"net"
 	"reflect"
-	"runtime/debug"
 	"sort"
 	"strconv"
 	"strings"
 	"sync"
 	"time"
 
+	greflection "google.golang.org/grpc/reflection"
+	reflectionv1pb "google.golang.org/grpc/reflection/grpc_reflection_v1"
+
 	// nolint: staticcheck
 	oldproto "github.com/golang/protobuf/proto"
-	"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/logger"
+	"go.unistack.org/micro/v3/logger"
-	metadata "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/meter"
-	"github.com/unistack-org/micro/v3/server"
+	"go.unistack.org/micro/v3/register"
+	"go.unistack.org/micro/v3/semconv"
+	"go.unistack.org/micro/v3/server"
+	msync "go.unistack.org/micro/v3/sync"
 	"golang.org/x/net/netutil"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/codes"
-	"google.golang.org/grpc/credentials"
 	"google.golang.org/grpc/encoding"
 	gmetadata "google.golang.org/grpc/metadata"
 	"google.golang.org/grpc/peer"
@@ -35,35 +39,35 @@ import (
 )
 
 const (
-	defaultContentType = "application/grpc"
+	DefaultContentType = "application/grpc"
 )
 
 /*
-type grpcServerReflection struct {
+type ServerReflection struct {
 	srv *grpc.Server
 	s   *serverReflectionServer
 }
 */
 
-type grpcServer struct {
+type Server struct {
 	handlers       map[string]server.Handler
 	srv            *grpc.Server
 	exit           chan chan error
-	wg          *sync.WaitGroup
+	wg             *msync.WaitGroup
 	rsvc           *register.Service
 	subscribers    map[*subscriber][]broker.Subscriber
 	rpc            *rServer
 	opts           server.Options
+	unknownHandler grpc.StreamHandler
 	sync.RWMutex
-	init       bool
 	started    bool
 	registered bool
 	reflection bool
 }
 
-func newGRPCServer(opts ...server.Option) server.Server {
+func newServer(opts ...server.Option) *Server {
 	// create a grpc server
-	g := &grpcServer{
+	g := &Server{
 		opts: server.NewOptions(opts...),
 		rpc: &rServer{
 			serviceMap: make(map[string]*service),
@@ -73,6 +77,8 @@ func newGRPCServer(opts ...server.Option) server.Server {
 		exit:        make(chan chan error),
 	}
 
+	g.opts.Meter = g.opts.Meter.Clone(meter.Labels("type", "grpc"))
+
 	return g
 }
 
@@ -92,7 +98,7 @@ func (r grpcRouter) ServeRequest(ctx context.Context, req server.Request, rsp se
 
 */
 
-func (g *grpcServer) configure(opts ...server.Option) error {
+func (g *Server) configure(opts ...server.Option) error {
 	g.Lock()
 	defer g.Unlock()
 
@@ -109,9 +115,6 @@ func (g *grpcServer) configure(opts ...server.Option) error {
 	if err := g.opts.Tracer.Init(); err != nil {
 		return err
 	}
-	if err := g.opts.Auth.Init(); err != nil {
-		return err
-	}
 	if err := g.opts.Logger.Init(); err != nil {
 		return err
 	}
@@ -122,8 +125,6 @@ func (g *grpcServer) configure(opts ...server.Option) error {
 		return err
 	}
 
-	g.wg = g.opts.Wait
-
 	if g.opts.Context != nil {
 		if codecs, ok := g.opts.Context.Value(codecsKey{}).(map[string]encoding.Codec); ok && codecs != nil {
 			for k, v := range codecs {
@@ -132,6 +133,10 @@ func (g *grpcServer) configure(opts ...server.Option) error {
 		}
 	}
 
+	for _, k := range g.opts.Codecs {
+		encoding.RegisterCodec(&wrapMicroCodec{k})
+	}
+
 	maxMsgSize := g.getMaxMsgSize()
 
 	gopts := []grpc.ServerOption{
@@ -140,12 +145,8 @@ func (g *grpcServer) configure(opts ...server.Option) error {
 		grpc.UnknownServiceHandler(g.handler),
 	}
 
-	if creds := g.getCredentials(); creds != nil {
-		gopts = append(gopts, grpc.Creds(creds))
-	}
-
 	if opts := g.getGrpcOptions(); opts != nil {
-		gopts = append(gopts, opts...)
+		gopts = append(opts, gopts...)
 	}
 
 	g.rsvc = nil
@@ -158,20 +159,29 @@ func (g *grpcServer) configure(opts ...server.Option) error {
 	}
 	g.srv = grpc.NewServer(gopts...)
 
-	if v, ok := g.opts.Context.Value(reflectionKey{}).(bool); ok {
+	if v, ok := g.opts.Context.Value(reflectionKey{}).(Reflector); ok {
-		g.reflection = v
+		reflectionv1pb.RegisterServerReflectionServer(
+			g.srv,
+			greflection.NewServerV1(greflection.ServerOptions{
+				Services:           v,
+				DescriptorResolver: v,
+				ExtensionResolver:  v,
+			}),
+		)
+	}
+
+	if h, ok := g.opts.Context.Value(unknownServiceHandlerKey{}).(grpc.StreamHandler); ok {
+		g.unknownHandler = h
 	}
 
 	if restart {
 		return g.Start()
 	}
 
-	g.init = true
-
 	return nil
 }
 
-func (g *grpcServer) getMaxMsgSize() int {
+func (g *Server) getMaxMsgSize() int {
 	if g.opts.Context == nil {
 		return codec.DefaultMaxMsgSize
 	}
@@ -182,14 +192,7 @@ func (g *grpcServer) getMaxMsgSize() int {
 	return s
 }
 
-func (g *grpcServer) getCredentials() credentials.TransportCredentials {
+func (g *Server) getGrpcOptions() []grpc.ServerOption {
-	if g.opts.TLSConfig != nil {
-		return credentials.NewTLS(g.opts.TLSConfig)
-	}
-	return nil
-}
-
-func (g *grpcServer) getGrpcOptions() []grpc.ServerOption {
 	if g.opts.Context == nil {
 		return nil
 	}
@@ -202,40 +205,39 @@ func (g *grpcServer) getGrpcOptions() []grpc.ServerOption {
 	return opts
 }
 
-func (g *grpcServer) handler(srv interface{}, stream grpc.ServerStream) (err error) {
+func (g *Server) handler(srv interface{}, stream grpc.ServerStream) error {
-	defer func() {
+	var err error
-		if r := recover(); r != nil {
-			g.RLock()
-			config := g.opts
-			g.RUnlock()
-			if config.Logger.V(logger.ErrorLevel) {
-				config.Logger.Error(config.Context, "panic recovered: ", r)
-				config.Logger.Error(config.Context, string(debug.Stack()))
-			}
-			err = errors.InternalServerError(g.opts.Name, "panic recovered: %v", r)
-		} else if err != nil {
-			g.RLock()
-			config := g.opts
-			g.RUnlock()
-			if config.Logger.V(logger.ErrorLevel) {
-				config.Logger.Errorf(config.Context, "grpc handler got error: %s", err)
-			}
-		}
-	}()
-
-	if g.wg != nil {
-		g.wg.Add(1)
-		defer g.wg.Done()
-	}
-
 	fullMethod, ok := grpc.MethodFromServerStream(stream)
 	if !ok {
 		return status.Errorf(codes.Internal, "method does not exist in context")
 	}
 
-	serviceName, methodName, err := serviceMethod(fullMethod)
+	ts := time.Now()
+	g.opts.Meter.Counter(semconv.ServerRequestInflight, "endpoint", fullMethod).Inc()
+	defer func() {
+		te := time.Since(ts)
+		g.opts.Meter.Summary(semconv.ServerRequestLatencyMicroseconds, "endpoint", fullMethod).Update(te.Seconds())
+		g.opts.Meter.Histogram(semconv.ServerRequestDurationSeconds, "endpoint", fullMethod).Update(te.Seconds())
+		g.opts.Meter.Counter(semconv.ServerRequestInflight, "endpoint", fullMethod).Dec()
+
+		st := status.Convert(err)
+		if st == nil || st.Code() == codes.OK {
+			g.opts.Meter.Counter(semconv.ServerRequestTotal, "endpoint", fullMethod, "status", "success", "code", strconv.Itoa(int(codes.OK))).Inc()
+		} else {
+			g.opts.Meter.Counter(semconv.ServerRequestTotal, "endpoint", fullMethod, "status", "failure", "code", strconv.Itoa(int(st.Code()))).Inc()
+		}
+	}()
+
+	var serviceName, methodName string
+	serviceName, methodName, err = serviceMethod(fullMethod)
 	if err != nil {
-		return status.New(codes.InvalidArgument, err.Error()).Err()
+		err = status.New(codes.InvalidArgument, err.Error()).Err()
+		return err
+	}
+
+	if g.opts.Wait != nil {
+		g.opts.Wait.Add(1)
+		defer g.opts.Wait.Done()
 	}
 
 	// get grpc metadata
@@ -248,15 +250,38 @@ func (g *grpcServer) handler(srv interface{}, stream grpc.ServerStream) (err err
 	for k, v := range gmd {
 		md.Set(k, strings.Join(v, ", "))
 	}
+	md.Set("Path", fullMethod)
+	md.Set("Micro-Server", "grpc")
+	md.Set(metadata.HeaderEndpoint, methodName)
+	md.Set(metadata.HeaderService, serviceName)
 
+	var td string
 	// timeout for server deadline
-	to, ok := md.Get("timeout")
+	if v, ok := md.Get("timeout"); ok {
-	if ok {
 		md.Del("timeout")
+		td = v
+	}
+	if v, ok := md.Get("Grpc-Timeout"); ok {
+		md.Del("Grpc-Timeout")
+		td = v[:len(v)-1]
+		switch v[len(v)-1:] {
+		case "S":
+			td += "s"
+		case "M":
+			td += "m"
+		case "H":
+			td += "h"
+		case "m":
+			td += "ms"
+		case "u":
+			td += "us"
+		case "n":
+			td += "ns"
+		}
 	}
 
 	// get content type
-	ct := defaultContentType
+	ct := DefaultContentType
 
 	if ctype, ok := md.Get("content-type"); ok {
 		ct = ctype
@@ -270,13 +295,14 @@ func (g *grpcServer) handler(srv interface{}, stream grpc.ServerStream) (err err
 
 	// get peer from context
 	if p, ok := peer.FromContext(stream.Context()); ok {
-		md["Remote"] = p.Addr.String()
+		md.Set("Remote", p.Addr.String())
 		ctx = peer.NewContext(ctx, p)
 	}
 
 	// set the timeout if we have it
-	if len(to) > 0 {
+	if len(td) > 0 {
-		if n, err := strconv.ParseUint(to, 10, 64); err == nil {
+		var n uint64
+		if n, err = strconv.ParseUint(td, 10, 64); err == nil {
 			var cancel context.CancelFunc
 			ctx, cancel = context.WithTimeout(ctx, time.Duration(n))
 			defer cancel()
@@ -287,48 +313,39 @@ func (g *grpcServer) handler(srv interface{}, stream grpc.ServerStream) (err err
 	svc := g.rpc.serviceMap[serviceName]
 	g.rpc.mu.RUnlock()
 
-	/*
-		if svc == nil && g.reflection && methodName == "ServerReflectionInfo" {
-			rfl := &grpcServerReflection{srv: g.srv, s: &serverReflectionServer{s: g.srv}}
-			svc = &service{}
-			svc.typ = reflect.TypeOf(rfl)
-			svc.rcvr = reflect.ValueOf(rfl)
-			svc.name = reflect.Indirect(svc.rcvr).Type().Name()
-			svc.method = make(map[string]*methodType)
-			typ := reflect.TypeOf(rfl)
-			if me, ok := typ.MethodByName("ServerReflectionInfo"); ok {
-				g.rpc.mu.Lock()
-				ep, err := prepareEndpoint(me)
-				if ep != nil && err != nil {
-					svc.method["ServerReflectionInfo"] = ep
-				} else if err != nil {
-					return status.New(codes.Unimplemented, err.Error()).Err()
-				}
-				g.rpc.mu.Unlock()
-			}
-		}
-	*/
-
 	if svc == nil {
-		return status.New(codes.Unimplemented, fmt.Sprintf("unknown service %s", serviceName)).Err()
+		if g.unknownHandler != nil {
+			err = g.unknownHandler(srv, stream)
+			return err
+		}
+		err = status.New(codes.Unimplemented, fmt.Sprintf("unknown service %s", serviceName)).Err()
+		return err
 	}
 
 	mtype := svc.method[methodName]
 	if mtype == nil {
-		return status.New(codes.Unimplemented, fmt.Sprintf("unknown service %s.%s", serviceName, methodName)).Err()
+		if g.unknownHandler != nil {
+			err = g.unknownHandler(srv, stream)
+			return err
+		}
+		err = status.New(codes.Unimplemented, fmt.Sprintf("unknown service method %s.%s", serviceName, methodName)).Err()
+		return err
 	}
 
 	// process unary
 	if !mtype.stream {
-		return g.processRequest(ctx, stream, svc, mtype, ct)
+		err = g.processRequest(ctx, stream, svc, mtype, ct)
+	} else {
+		// process stream
+		err = g.processStream(ctx, stream, svc, mtype, ct)
 	}
 
-	// process stream
+	return err
-	return g.processStream(ctx, stream, svc, mtype, ct)
 }
 
-func (g *grpcServer) processRequest(ctx context.Context, stream grpc.ServerStream, service *service, mtype *methodType, ct string) error {
+func (g *Server) processRequest(ctx context.Context, stream grpc.ServerStream, service *service, mtype *methodType, ct string) error {
 	// for {
+	var err error
 	var argv, replyv reflect.Value
 
 	// Decode the argument value.
@@ -341,7 +358,7 @@ func (g *grpcServer) processRequest(ctx context.Context, stream grpc.ServerStrea
 	}
 
 	// Unmarshal request
-	if err := stream.RecvMsg(argv.Interface()); err != nil {
+	if err = stream.RecvMsg(argv.Interface()); err != nil {
 		return err
 	}
 
@@ -355,26 +372,17 @@ func (g *grpcServer) processRequest(ctx context.Context, stream grpc.ServerStrea
 	function := mtype.method.Func
 	var returnValues []reflect.Value
 
-	cf, err := g.newCodec(ct)
-	if err != nil {
-		return errors.InternalServerError(g.opts.Name, err.Error())
-	}
-	b, err := cf.Marshal(argv.Interface())
-	if err != nil {
-		return err
-	}
-
 	// create a client.Request
 	r := &rpcRequest{
 		service:     g.opts.Name,
 		contentType: ct,
 		method:      fmt.Sprintf("%s.%s", service.name, mtype.method.Name),
-		body:        b,
+		endpoint:    fmt.Sprintf("%s.%s", service.name, mtype.method.Name),
 		payload:     argv.Interface(),
 	}
 	// define the handler func
 	fn := func(ctx context.Context, req server.Request, rsp interface{}) (err error) {
-		returnValues = function.Call([]reflect.Value{service.rcvr, mtype.prepareContext(ctx), reflect.ValueOf(argv.Interface()), reflect.ValueOf(rsp)})
+		returnValues = function.Call([]reflect.Value{service.rcvr, mtype.prepareContext(ctx), argv, reflect.ValueOf(rsp)})
 
 		// The return value for the method is an error.
 		if rerr := returnValues[0].Interface(); rerr != nil {
@@ -392,7 +400,13 @@ func (g *grpcServer) processRequest(ctx context.Context, stream grpc.ServerStrea
 	statusCode := codes.OK
 	statusDesc := ""
 	// execute the handler
-	if appErr := fn(ctx, r, replyv.Interface()); appErr != nil {
+	appErr := fn(ctx, r, replyv.Interface())
+	if outmd, ok := metadata.FromOutgoingContext(ctx); ok {
+		if err = stream.SendHeader(gmetadata.New(outmd)); err != nil {
+			return err
+		}
+	}
+	if appErr != nil {
 		var errStatus *status.Status
 		switch verr := appErr.(type) {
 		case *errors.Error:
@@ -407,6 +421,8 @@ func (g *grpcServer) processRequest(ctx context.Context, stream grpc.ServerStrea
 			if err != nil {
 				return err
 			}
+		case (interface{ GRPCStatus() *status.Status }):
+			errStatus = verr.GRPCStatus()
 		default:
 			g.RLock()
 			config := g.opts
@@ -428,60 +444,16 @@ func (g *grpcServer) processRequest(ctx context.Context, stream grpc.ServerStrea
 	}
 
 	return status.New(statusCode, statusDesc).Err()
-	//	}
 }
 
-/*
+func (g *Server) processStream(ctx context.Context, stream grpc.ServerStream, service *service, mtype *methodType, ct string) error {
-type reflectStream struct {
-	stream server.Stream
-}
-
-func (s *reflectStream) Send(rsp *grpcreflect.ServerReflectionResponse) error {
-	return s.stream.Send(rsp)
-}
-
-func (s *reflectStream) Recv() (*grpcreflect.ServerReflectionRequest, error) {
-	req := &grpcreflect.ServerReflectionRequest{}
-	err := s.stream.Recv(req)
-	return req, err
-}
-
-func (s *reflectStream) SetHeader(gmetadata.MD) error {
-	return nil
-}
-
-func (s *reflectStream) SendHeader(gmetadata.MD) error {
-	return nil
-}
-
-func (s *reflectStream) SetTrailer(gmetadata.MD) {
-
-}
-
-func (s *reflectStream) Context() context.Context {
-	return s.stream.Context()
-}
-
-func (s *reflectStream) SendMsg(m interface{}) error {
-	return s.stream.Send(m)
-}
-
-func (s *reflectStream) RecvMsg(m interface{}) error {
-	return s.stream.Recv(m)
-}
-
-func (g *grpcServerReflection) ServerReflectionInfo(ctx context.Context, stream server.Stream) error {
-	return g.s.ServerReflectionInfo(&reflectStream{stream})
-}
-*/
-
-func (g *grpcServer) processStream(ctx context.Context, stream grpc.ServerStream, service *service, mtype *methodType, ct string) error {
 	opts := g.opts
 
 	r := &rpcRequest{
 		service:     opts.Name,
 		contentType: ct,
 		method:      fmt.Sprintf("%s.%s", service.name, mtype.method.Name),
+		endpoint:    fmt.Sprintf("%s.%s", service.name, mtype.method.Name),
 		stream:      true,
 	}
 
@@ -510,7 +482,13 @@ func (g *grpcServer) processStream(ctx context.Context, stream grpc.ServerStream
 	statusCode := codes.OK
 	statusDesc := ""
 
-	if appErr := fn(ctx, r, ss); appErr != nil {
+	appErr := fn(ctx, r, ss)
+	if outmd, ok := metadata.FromOutgoingContext(ctx); ok {
+		if err := stream.SendHeader(gmetadata.New(outmd)); err != nil {
+			return err
+		}
+	}
+	if appErr != nil {
 		var err error
 		var errStatus *status.Status
 		switch verr := appErr.(type) {
@@ -542,7 +520,7 @@ func (g *grpcServer) processStream(ctx context.Context, stream grpc.ServerStream
 	return status.New(statusCode, statusDesc).Err()
 }
 
-func (g *grpcServer) newCodec(ct string) (codec.Codec, error) {
+func (g *Server) newCodec(ct string) (codec.Codec, error) {
 	g.RLock()
 	defer g.RUnlock()
 
@@ -557,7 +535,7 @@ func (g *grpcServer) newCodec(ct string) (codec.Codec, error) {
 	return nil, codec.ErrUnknownContentType
 }
 
-func (g *grpcServer) Options() server.Options {
+func (g *Server) Options() server.Options {
 	g.RLock()
 	opts := g.opts
 	g.RUnlock()
@@ -565,18 +543,15 @@ func (g *grpcServer) Options() server.Options {
 	return opts
 }
 
-func (g *grpcServer) Init(opts ...server.Option) error {
+func (g *Server) Init(opts ...server.Option) error {
-	if len(opts) == 0 && g.init {
-		return nil
-	}
 	return g.configure(opts...)
 }
 
-func (g *grpcServer) NewHandler(h interface{}, opts ...server.HandlerOption) server.Handler {
+func (g *Server) NewHandler(h interface{}, opts ...server.HandlerOption) server.Handler {
 	return newRPCHandler(h, opts...)
 }
 
-func (g *grpcServer) Handle(h server.Handler) error {
+func (g *Server) Handle(h server.Handler) error {
 	if err := g.rpc.register(h.Handler()); err != nil {
 		return err
 	}
@@ -585,11 +560,11 @@ func (g *grpcServer) Handle(h server.Handler) error {
 	return nil
 }
 
-func (g *grpcServer) NewSubscriber(topic string, sb interface{}, opts ...server.SubscriberOption) server.Subscriber {
+func (g *Server) NewSubscriber(topic string, sb interface{}, opts ...server.SubscriberOption) server.Subscriber {
 	return newSubscriber(topic, sb, opts...)
 }
 
-func (g *grpcServer) Subscribe(sb server.Subscriber) error {
+func (g *Server) Subscribe(sb server.Subscriber) error {
 	sub, ok := sb.(*subscriber)
 	if !ok {
 		return fmt.Errorf("invalid subscriber: expected *subscriber")
@@ -613,7 +588,7 @@ func (g *grpcServer) Subscribe(sb server.Subscriber) error {
 	return nil
 }
 
-func (g *grpcServer) Register() error {
+func (g *Server) Register() error {
 	g.RLock()
 	rsvc := g.rsvc
 	config := g.opts
@@ -670,7 +645,7 @@ func (g *grpcServer) Register() error {
 
 	if !registered {
 		if config.Logger.V(logger.InfoLevel) {
-			config.Logger.Infof(config.Context, "Register [%s] Registering node: %s", config.Register.String(), service.Nodes[0].Id)
+			config.Logger.Infof(config.Context, "Register [%s] Registering node: %s", config.Register.String(), service.Nodes[0].ID)
 		}
 	}
 
@@ -687,37 +662,13 @@ func (g *grpcServer) Register() error {
 	g.Lock()
 	defer g.Unlock()
 
-	for sb := range g.subscribers {
-		handler := g.createSubHandler(sb, config)
-		var opts []broker.SubscribeOption
-		if queue := sb.Options().Queue; len(queue) > 0 {
-			opts = append(opts, broker.SubscribeGroup(queue))
-		}
-
-		subCtx := config.Context
-		if cx := sb.Options().Context; cx != nil {
-			subCtx = cx
-		}
-		opts = append(opts, broker.SubscribeContext(subCtx))
-		opts = append(opts, broker.SubscribeAutoAck(sb.Options().AutoAck))
-
-		if config.Logger.V(logger.InfoLevel) {
-			config.Logger.Infof(config.Context, "Subscribing to topic: %s", sb.Topic())
-		}
-		sub, err := config.Broker.Subscribe(subCtx, sb.Topic(), handler, opts...)
-		if err != nil {
-			return err
-		}
-		g.subscribers[sb] = []broker.Subscriber{sub}
-	}
-
 	g.registered = true
 	g.rsvc = service
 
 	return nil
 }
 
-func (g *grpcServer) Deregister() error {
+func (g *Server) Deregister() error {
 	var err error
 
 	g.RLock()
@@ -730,7 +681,7 @@ func (g *grpcServer) Deregister() error {
 	}
 
 	if config.Logger.V(logger.InfoLevel) {
-		config.Logger.Infof(config.Context, "Deregistering node: %s", service.Nodes[0].Id)
+		config.Logger.Infof(config.Context, "Deregistering node: %s", service.Nodes[0].ID)
 	}
 
 	if err := server.DefaultDeregisterFunc(service, config); err != nil {
@@ -771,7 +722,7 @@ func (g *grpcServer) Deregister() error {
 	return nil
 }
 
-func (g *grpcServer) Start() error {
+func (g *Server) Start() error {
 	g.RLock()
 	if g.started {
 		g.RUnlock()
@@ -781,18 +732,13 @@ func (g *grpcServer) Start() error {
 
 	config := g.Options()
 
-	for _, k := range config.Codecs {
-		encoding.RegisterCodec(&wrapMicroCodec{k})
-	}
-
 	// micro: config.Transport.Listen(config.Address)
 	var ts net.Listener
+	var err error
 
 	if l := config.Listener; l != nil {
 		ts = l
 	} else {
-		var err error
-
 		// check the tls config for secure connect
 		if tc := config.TLSConfig; tc != nil {
 			ts, err = tls.Listen("tcp", config.Address, tc)
@@ -822,7 +768,7 @@ func (g *grpcServer) Start() error {
 	// only connect if we're subscribed
 	if len(g.subscribers) > 0 {
 		// connect to the broker
-		if err := config.Broker.Connect(config.Context); err != nil {
+		if err = config.Broker.Connect(config.Context); err != nil {
 			if config.Logger.V(logger.ErrorLevel) {
 				config.Logger.Errorf(config.Context, "Broker [%s] connect error: %v", config.Broker.String(), err)
 			}
@@ -836,26 +782,30 @@ func (g *grpcServer) Start() error {
 
 	// use RegisterCheck func before register
 	// nolint: nestif
-	if err := g.opts.RegisterCheck(config.Context); err != nil {
+	if err = g.opts.RegisterCheck(config.Context); err != nil {
 		if config.Logger.V(logger.ErrorLevel) {
-			config.Logger.Errorf(config.Context, "Server %s-%s register check error: %s", config.Name, config.Id, err)
+			config.Logger.Errorf(config.Context, "Server %s-%s register check error: %s", config.Name, config.ID, err)
 		}
 	} else {
 		// announce self to the world
-		if err := g.Register(); err != nil {
+		if err = g.Register(); err != nil {
 			if config.Logger.V(logger.ErrorLevel) {
 				config.Logger.Errorf(config.Context, "Server register error: %v", err)
 			}
 		}
 	}
 
+	if err = g.subscribe(); err != nil {
+		return err
+	}
+
 	// micro: go ts.Accept(s.accept)
 	go func() {
-		if err := g.srv.Serve(ts); err != nil {
+		if err = g.srv.Serve(ts); err != nil {
 			if config.Logger.V(logger.ErrorLevel) {
 				config.Logger.Errorf(config.Context, "gRPC Server start error: %v", err)
 			}
-			if err := g.Stop(); err != nil {
+			if err = g.Stop(); err != nil {
 				if config.Logger.V(logger.ErrorLevel) {
 					config.Logger.Errorf(config.Context, "gRPC Server stop error: %v", err)
 				}
@@ -887,23 +837,23 @@ func (g *grpcServer) Start() error {
 				// nolint: nestif
 				if rerr != nil && registered {
 					if config.Logger.V(logger.ErrorLevel) {
-						config.Logger.Errorf(config.Context, "Server %s-%s register check error: %s, deregister it", config.Name, config.Id, rerr)
+						config.Logger.Errorf(config.Context, "Server %s-%s register check error: %s, deregister it", config.Name, config.ID, rerr)
 					}
 					// deregister self in case of error
-					if err := g.Deregister(); err != nil {
+					if err = g.Deregister(); err != nil {
 						if config.Logger.V(logger.ErrorLevel) {
-							config.Logger.Errorf(config.Context, "Server %s-%s deregister error: %s", config.Name, config.Id, err)
+							config.Logger.Errorf(config.Context, "Server %s-%s deregister error: %s", config.Name, config.ID, err)
 						}
 					}
 				} else if rerr != nil && !registered {
 					if config.Logger.V(logger.ErrorLevel) {
-						config.Logger.Errorf(config.Context, "Server %s-%s register check error: %s", config.Name, config.Id, rerr)
+						config.Logger.Errorf(config.Context, "Server %s-%s register check error: %s", config.Name, config.ID, rerr)
 					}
 					continue
 				}
-				if err := g.Register(); err != nil {
+				if err = g.Register(); err != nil {
 					if config.Logger.V(logger.ErrorLevel) {
-						config.Logger.Errorf(config.Context, "Server %s-%s register error: %s", config.Name, config.Id, err)
+						config.Logger.Errorf(config.Context, "Server %s-%s register error: %s", config.Name, config.ID, err)
 					}
 				}
 			// wait for exit
@@ -913,15 +863,15 @@ func (g *grpcServer) Start() error {
 		}
 
 		// deregister self
-		if err := g.Deregister(); err != nil {
+		if err = g.Deregister(); err != nil {
 			if config.Logger.V(logger.ErrorLevel) {
-				config.Logger.Errorf(config.Context, "Server deregister error: ", err)
+				config.Logger.Errorf(config.Context, "Server deregister error: %v", err)
 			}
 		}
 
 		// wait for waitgroup
-		if g.wg != nil {
+		if g.opts.Wait != nil {
-			g.wg.Wait()
+			g.opts.Wait.Wait()
 		}
 
 		// stop the grpc server
@@ -934,7 +884,7 @@ func (g *grpcServer) Start() error {
 
 		select {
 		case <-exit:
-		case <-time.After(time.Second):
+		case <-time.After(g.opts.GracefulTimeout):
 			g.srv.Stop()
 		}
 
@@ -945,7 +895,7 @@ func (g *grpcServer) Start() error {
 			config.Logger.Infof(config.Context, "Broker [%s] Disconnected from %s", config.Broker.String(), config.Broker.Address())
 		}
 		// disconnect broker
-		if err := config.Broker.Disconnect(config.Context); err != nil {
+		if err = config.Broker.Disconnect(config.Context); err != nil {
 			if config.Logger.V(logger.ErrorLevel) {
 				config.Logger.Errorf(config.Context, "Broker [%s] disconnect error: %v", config.Broker.String(), err)
 			}
@@ -960,7 +910,38 @@ func (g *grpcServer) Start() error {
 	return nil
 }
 
-func (g *grpcServer) Stop() error {
+func (g *Server) subscribe() error {
+	config := g.opts
+
+	for sb := range g.subscribers {
+		handler := g.createSubHandler(sb, config)
+		var opts []broker.SubscribeOption
+		if queue := sb.Options().Queue; len(queue) > 0 {
+			opts = append(opts, broker.SubscribeGroup(queue))
+		}
+
+		subCtx := config.Context
+		if cx := sb.Options().Context; cx != nil {
+			subCtx = cx
+		}
+		opts = append(opts, broker.SubscribeContext(subCtx))
+		opts = append(opts, broker.SubscribeAutoAck(sb.Options().AutoAck))
+		opts = append(opts, broker.SubscribeBodyOnly(sb.Options().BodyOnly))
+
+		if config.Logger.V(logger.InfoLevel) {
+			config.Logger.Infof(config.Context, "Subscribing to topic: %s", sb.Topic())
+		}
+		sub, err := config.Broker.Subscribe(subCtx, sb.Topic(), handler, opts...)
+		if err != nil {
+			return err
+		}
+		g.subscribers[sb] = []broker.Subscriber{sub}
+	}
+
+	return nil
+}
+
+func (g *Server) Stop() error {
 	g.RLock()
 	if !g.started {
 		g.RUnlock()
@@ -980,14 +961,18 @@ func (g *grpcServer) Stop() error {
 	return err
 }
 
-func (g *grpcServer) String() string {
+func (g *Server) String() string {
 	return "grpc"
 }
 
-func (g *grpcServer) Name() string {
+func (g *Server) Name() string {
 	return g.opts.Name
 }
 
-func NewServer(opts ...server.Option) server.Server {
+func (g *Server) GRPCServer() *grpc.Server {
-	return newGRPCServer(opts...)
+	return g.srv
+}
+
+func NewServer(opts ...server.Option) *Server {
+	return newServer(opts...)
 }

handler.go

@@ -3,8 +3,8 @@ package grpc
 import (
 	"reflect"
 
-	"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"
 )
 
 type rpcHandler struct {

options.go

@@ -3,7 +3,7 @@ package grpc
 import (
 	"context"
 
-	"github.com/unistack-org/micro/v3/server"
+	"go.unistack.org/micro/v3/server"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/encoding"
 )
@@ -13,6 +13,7 @@ type (
 	grpcOptions              struct{}
 	maxMsgSizeKey            struct{}
 	reflectionKey            struct{}
+	unknownServiceHandlerKey struct{}
 )
 
 // gRPC Codec to be used to encode/decode requests for a given content type
@@ -32,18 +33,21 @@ func Codec(contentType string, c encoding.Codec) server.Option {
 
 // Options to be used to configure gRPC options
 func Options(opts ...grpc.ServerOption) server.Option {
-	return setServerOption(grpcOptions{}, opts)
+	return server.SetOption(grpcOptions{}, opts)
 }
 
-//
 // MaxMsgSize set the maximum message in bytes the server can receive and
 // send. Default maximum message size is 4 MB.
-//
 func MaxMsgSize(s int) server.Option {
-	return setServerOption(maxMsgSizeKey{}, s)
+	return server.SetOption(maxMsgSizeKey{}, s)
 }
 
 // Reflection enables reflection support in grpc server
-func Reflection(b bool) server.Option {
+func Reflection(r Reflector) server.Option {
-	return setServerOption(reflectionKey{}, b)
+	return server.SetOption(reflectionKey{}, r)
+}
+
+// UnknownServiceHandler enables support for all services
+func UnknownServiceHandler(h grpc.StreamHandler) server.Option {
+	return server.SetOption(unknownServiceHandlerKey{}, h)
 }

proto/test.pb.go

@@ -0,0 +1,208 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.26.0
+// 	protoc        v4.25.2
+// source: test.proto
+
+package testpb
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type CallReq struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Data string `protobuf:"bytes,1,opt,name=data,proto3" json:"data,omitempty"`
+}
+
+func (x *CallReq) Reset() {
+	*x = CallReq{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_test_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *CallReq) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*CallReq) ProtoMessage() {}
+
+func (x *CallReq) ProtoReflect() protoreflect.Message {
+	mi := &file_test_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use CallReq.ProtoReflect.Descriptor instead.
+func (*CallReq) Descriptor() ([]byte, []int) {
+	return file_test_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *CallReq) GetData() string {
+	if x != nil {
+		return x.Data
+	}
+	return ""
+}
+
+type CallRsp struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Data string `protobuf:"bytes,1,opt,name=data,proto3" json:"data,omitempty"`
+}
+
+func (x *CallRsp) Reset() {
+	*x = CallRsp{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_test_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *CallRsp) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*CallRsp) ProtoMessage() {}
+
+func (x *CallRsp) ProtoReflect() protoreflect.Message {
+	mi := &file_test_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use CallRsp.ProtoReflect.Descriptor instead.
+func (*CallRsp) Descriptor() ([]byte, []int) {
+	return file_test_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *CallRsp) GetData() string {
+	if x != nil {
+		return x.Data
+	}
+	return ""
+}
+
+var File_test_proto protoreflect.FileDescriptor
+
+var file_test_proto_rawDesc = []byte{
+	0x0a, 0x0a, 0x74, 0x65, 0x73, 0x74, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x04, 0x74, 0x65,
+	0x73, 0x74, 0x22, 0x1d, 0x0a, 0x07, 0x43, 0x61, 0x6c, 0x6c, 0x52, 0x65, 0x71, 0x12, 0x12, 0x0a,
+	0x04, 0x64, 0x61, 0x74, 0x61, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x64, 0x61, 0x74,
+	0x61, 0x22, 0x1d, 0x0a, 0x07, 0x43, 0x61, 0x6c, 0x6c, 0x52, 0x73, 0x70, 0x12, 0x12, 0x0a, 0x04,
+	0x64, 0x61, 0x74, 0x61, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x64, 0x61, 0x74, 0x61,
+	0x32, 0x33, 0x0a, 0x0b, 0x54, 0x65, 0x73, 0x74, 0x53, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x12,
+	0x24, 0x0a, 0x04, 0x43, 0x61, 0x6c, 0x6c, 0x12, 0x0d, 0x2e, 0x74, 0x65, 0x73, 0x74, 0x2e, 0x43,
+	0x61, 0x6c, 0x6c, 0x52, 0x65, 0x71, 0x1a, 0x0d, 0x2e, 0x74, 0x65, 0x73, 0x74, 0x2e, 0x43, 0x61,
+	0x6c, 0x6c, 0x52, 0x73, 0x70, 0x42, 0x0b, 0x5a, 0x09, 0x2e, 0x2f, 0x3b, 0x74, 0x65, 0x73, 0x74,
+	0x70, 0x62, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_test_proto_rawDescOnce sync.Once
+	file_test_proto_rawDescData = file_test_proto_rawDesc
+)
+
+func file_test_proto_rawDescGZIP() []byte {
+	file_test_proto_rawDescOnce.Do(func() {
+		file_test_proto_rawDescData = protoimpl.X.CompressGZIP(file_test_proto_rawDescData)
+	})
+	return file_test_proto_rawDescData
+}
+
+var file_test_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
+var file_test_proto_goTypes = []interface{}{
+	(*CallReq)(nil), // 0: test.CallReq
+	(*CallRsp)(nil), // 1: test.CallRsp
+}
+var file_test_proto_depIdxs = []int32{
+	0, // 0: test.TestService.Call:input_type -> test.CallReq
+	1, // 1: test.TestService.Call:output_type -> test.CallRsp
+	1, // [1:2] is the sub-list for method output_type
+	0, // [0:1] is the sub-list for method input_type
+	0, // [0:0] is the sub-list for extension type_name
+	0, // [0:0] is the sub-list for extension extendee
+	0, // [0:0] is the sub-list for field type_name
+}
+
+func init() { file_test_proto_init() }
+func file_test_proto_init() {
+	if File_test_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_test_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*CallReq); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_test_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*CallRsp); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_test_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   2,
+			NumExtensions: 0,
+			NumServices:   1,
+		},
+		GoTypes:           file_test_proto_goTypes,
+		DependencyIndexes: file_test_proto_depIdxs,
+		MessageInfos:      file_test_proto_msgTypes,
+	}.Build()
+	File_test_proto = out.File
+	file_test_proto_rawDesc = nil
+	file_test_proto_goTypes = nil
+	file_test_proto_depIdxs = nil
+}

proto/test.proto

@@ -0,0 +1,18 @@
+syntax = "proto3";
+
+package test;
+
+option go_package = "./;testpb";
+
+
+service TestService {
+  rpc Call(CallReq) returns (CallRsp);
+}
+
+message CallReq {
+  string data = 1;
+}
+
+message CallRsp {
+  string data = 1;
+}

proto/test_grpc.pb.go

@@ -0,0 +1,109 @@
+// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+// versions:
+// - protoc-gen-go-grpc v1.3.0
+// - protoc             v4.25.2
+// source: test.proto
+
+package testpb
+
+import (
+	context "context"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+)
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+// Requires gRPC-Go v1.32.0 or later.
+const _ = grpc.SupportPackageIsVersion7
+
+const (
+	TestService_Call_FullMethodName = "/test.TestService/Call"
+)
+
+// TestServiceClient is the client API for TestService service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
+type TestServiceClient interface {
+	Call(ctx context.Context, in *CallReq, opts ...grpc.CallOption) (*CallRsp, error)
+}
+
+type testServiceClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewTestServiceClient(cc grpc.ClientConnInterface) TestServiceClient {
+	return &testServiceClient{cc}
+}
+
+func (c *testServiceClient) Call(ctx context.Context, in *CallReq, opts ...grpc.CallOption) (*CallRsp, error) {
+	out := new(CallRsp)
+	err := c.cc.Invoke(ctx, TestService_Call_FullMethodName, in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// TestServiceServer is the server API for TestService service.
+// All implementations must embed UnimplementedTestServiceServer
+// for forward compatibility
+type TestServiceServer interface {
+	Call(context.Context, *CallReq) (*CallRsp, error)
+	mustEmbedUnimplementedTestServiceServer()
+}
+
+// UnimplementedTestServiceServer must be embedded to have forward compatible implementations.
+type UnimplementedTestServiceServer struct {
+}
+
+func (UnimplementedTestServiceServer) Call(context.Context, *CallReq) (*CallRsp, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method Call not implemented")
+}
+func (UnimplementedTestServiceServer) mustEmbedUnimplementedTestServiceServer() {}
+
+// UnsafeTestServiceServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to TestServiceServer will
+// result in compilation errors.
+type UnsafeTestServiceServer interface {
+	mustEmbedUnimplementedTestServiceServer()
+}
+
+func RegisterTestServiceServer(s grpc.ServiceRegistrar, srv TestServiceServer) {
+	s.RegisterService(&TestService_ServiceDesc, srv)
+}
+
+func _TestService_Call_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(CallReq)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(TestServiceServer).Call(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: TestService_Call_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(TestServiceServer).Call(ctx, req.(*CallReq))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+// TestService_ServiceDesc is the grpc.ServiceDesc for TestService service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var TestService_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "test.TestService",
+	HandlerType: (*TestServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "Call",
+			Handler:    _TestService_Call_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "test.proto",
+}

reflection.go

@@ -1,488 +1,21 @@
-// +build ignore
-
-/*
- *
- * Copyright 2016 gRPC authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-/*
-Package reflection implements server reflection service.
-
-The service implemented is defined in:
-https://github.com/grpc/grpc/blob/master/src/proto/grpc/reflection/v1alpha/reflection.proto.
-
-To register server reflection on a gRPC server:
-	import "google.golang.org/grpc/reflection"
-
-	s := grpc.NewServer()
-	pb.RegisterYourOwnServer(s, &server{})
-
-	// Register reflection service on gRPC server.
-	reflection.Register(s)
-
-	s.Serve(lis)
-
-*/
 package grpc
 
 import (
-	"bytes"
+	"google.golang.org/grpc/reflection"
-	"compress/gzip"
+	"google.golang.org/protobuf/reflect/protodesc"
-	"fmt"
-	"io"
-	"io/ioutil"
-	"reflect"
-	"sort"
-	"sync"
-
-	"github.com/golang/protobuf/proto"
-	dpb "github.com/golang/protobuf/protoc-gen-go/descriptor"
-	"google.golang.org/grpc"
-	"google.golang.org/grpc/codes"
-	rpb "google.golang.org/grpc/reflection/grpc_reflection_v1alpha"
-	"google.golang.org/grpc/status"
 )
 
-type serverReflectionServer struct {
+type Reflector interface {
-	rpb.UnimplementedServerReflectionServer
+	protodesc.Resolver
-	s *grpc.Server
+	reflection.ServiceInfoProvider
-
+	reflection.ExtensionResolver
-	initSymbols  sync.Once
-	serviceNames []string
-	symbols      map[string]*dpb.FileDescriptorProto // map of fully-qualified names to files
 }
 
-// Register registers the server reflection service on the given gRPC server.
+const (
-func Register(s *grpc.Server) {
+	// ReflectV1ServiceName is the fully-qualified name of the v1 version of the reflection service.
-	rpb.RegisterServerReflectionServer(s, &serverReflectionServer{
+	ReflectV1ServiceName = "grpc.reflection.v1.ServerReflection"
-		s: s,
+	// ReflectServiceURLPathV1 is the full path for reflection service endpoint
-	})
+	ReflectServiceURLPathV1 = "/" + ReflectV1ServiceName + "/"
-}
+	// ReflectMethodName is the reflection service name
-
+	ReflectMethodName = "ServerReflectionInfo"
-// protoMessage is used for type assertion on proto messages.
+)
-// Generated proto message implements function Descriptor(), but Descriptor()
-// is not part of interface proto.Message. This interface is needed to
-// call Descriptor().
-type protoMessage interface {
-	Descriptor() ([]byte, []int)
-}
-
-func (s *serverReflectionServer) getSymbols() (svcNames []string, symbolIndex map[string]*dpb.FileDescriptorProto) {
-	s.initSymbols.Do(func() {
-		serviceInfo := s.s.GetServiceInfo()
-
-		s.symbols = map[string]*dpb.FileDescriptorProto{}
-		s.serviceNames = make([]string, 0, len(serviceInfo))
-		processed := map[string]struct{}{}
-		for svc, info := range serviceInfo {
-			s.serviceNames = append(s.serviceNames, svc)
-			fdenc, ok := parseMetadata(info.Metadata)
-			if !ok {
-				continue
-			}
-			fd, err := decodeFileDesc(fdenc)
-			if err != nil {
-				continue
-			}
-			s.processFile(fd, processed)
-		}
-		sort.Strings(s.serviceNames)
-	})
-
-	return s.serviceNames, s.symbols
-}
-
-func (s *serverReflectionServer) processFile(fd *dpb.FileDescriptorProto, processed map[string]struct{}) {
-	filename := fd.GetName()
-	if _, ok := processed[filename]; ok {
-		return
-	}
-	processed[filename] = struct{}{}
-
-	prefix := fd.GetPackage()
-
-	for _, msg := range fd.MessageType {
-		s.processMessage(fd, prefix, msg)
-	}
-	for _, en := range fd.EnumType {
-		s.processEnum(fd, prefix, en)
-	}
-	for _, ext := range fd.Extension {
-		s.processField(fd, prefix, ext)
-	}
-	for _, svc := range fd.Service {
-		svcName := fqn(prefix, svc.GetName())
-		s.symbols[svcName] = fd
-		for _, meth := range svc.Method {
-			name := fqn(svcName, meth.GetName())
-			s.symbols[name] = fd
-		}
-	}
-
-	for _, dep := range fd.Dependency {
-		fdenc := proto.FileDescriptor(dep)
-		fdDep, err := decodeFileDesc(fdenc)
-		if err != nil {
-			continue
-		}
-		s.processFile(fdDep, processed)
-	}
-}
-
-func (s *serverReflectionServer) processMessage(fd *dpb.FileDescriptorProto, prefix string, msg *dpb.DescriptorProto) {
-	msgName := fqn(prefix, msg.GetName())
-	s.symbols[msgName] = fd
-
-	for _, nested := range msg.NestedType {
-		s.processMessage(fd, msgName, nested)
-	}
-	for _, en := range msg.EnumType {
-		s.processEnum(fd, msgName, en)
-	}
-	for _, ext := range msg.Extension {
-		s.processField(fd, msgName, ext)
-	}
-	for _, fld := range msg.Field {
-		s.processField(fd, msgName, fld)
-	}
-	for _, oneof := range msg.OneofDecl {
-		oneofName := fqn(msgName, oneof.GetName())
-		s.symbols[oneofName] = fd
-	}
-}
-
-func (s *serverReflectionServer) processEnum(fd *dpb.FileDescriptorProto, prefix string, en *dpb.EnumDescriptorProto) {
-	enName := fqn(prefix, en.GetName())
-	s.symbols[enName] = fd
-
-	for _, val := range en.Value {
-		valName := fqn(enName, val.GetName())
-		s.symbols[valName] = fd
-	}
-}
-
-func (s *serverReflectionServer) processField(fd *dpb.FileDescriptorProto, prefix string, fld *dpb.FieldDescriptorProto) {
-	fldName := fqn(prefix, fld.GetName())
-	s.symbols[fldName] = fd
-}
-
-func fqn(prefix, name string) string {
-	if prefix == "" {
-		return name
-	}
-	return prefix + "." + name
-}
-
-// fileDescForType gets the file descriptor for the given type.
-// The given type should be a proto message.
-func (s *serverReflectionServer) fileDescForType(st reflect.Type) (*dpb.FileDescriptorProto, error) {
-	m, ok := reflect.Zero(reflect.PtrTo(st)).Interface().(protoMessage)
-	if !ok {
-		return nil, fmt.Errorf("failed to create message from type: %v", st)
-	}
-	enc, _ := m.Descriptor()
-
-	return decodeFileDesc(enc)
-}
-
-// decodeFileDesc does decompression and unmarshalling on the given
-// file descriptor byte slice.
-func decodeFileDesc(enc []byte) (*dpb.FileDescriptorProto, error) {
-	raw, err := decompress(enc)
-	if err != nil {
-		return nil, fmt.Errorf("failed to decompress enc: %v", err)
-	}
-
-	fd := new(dpb.FileDescriptorProto)
-	if err := proto.Unmarshal(raw, fd); err != nil {
-		return nil, fmt.Errorf("bad descriptor: %v", err)
-	}
-	return fd, nil
-}
-
-// decompress does gzip decompression.
-func decompress(b []byte) ([]byte, error) {
-	r, err := gzip.NewReader(bytes.NewReader(b))
-	if err != nil {
-		return nil, fmt.Errorf("bad gzipped descriptor: %v", err)
-	}
-	out, err := ioutil.ReadAll(r)
-	if err != nil {
-		return nil, fmt.Errorf("bad gzipped descriptor: %v", err)
-	}
-	return out, nil
-}
-
-func typeForName(name string) (reflect.Type, error) {
-	pt := proto.MessageType(name)
-	if pt == nil {
-		return nil, fmt.Errorf("unknown type: %q", name)
-	}
-	st := pt.Elem()
-
-	return st, nil
-}
-
-func fileDescContainingExtension(st reflect.Type, ext int32) (*dpb.FileDescriptorProto, error) {
-	m, ok := reflect.Zero(reflect.PtrTo(st)).Interface().(proto.Message)
-	if !ok {
-		return nil, fmt.Errorf("failed to create message from type: %v", st)
-	}
-
-	var extDesc *proto.ExtensionDesc
-	for id, desc := range proto.RegisteredExtensions(m) {
-		if id == ext {
-			extDesc = desc
-			break
-		}
-	}
-
-	if extDesc == nil {
-		return nil, fmt.Errorf("failed to find registered extension for extension number %v", ext)
-	}
-
-	return decodeFileDesc(proto.FileDescriptor(extDesc.Filename))
-}
-
-func (s *serverReflectionServer) allExtensionNumbersForType(st reflect.Type) ([]int32, error) {
-	m, ok := reflect.Zero(reflect.PtrTo(st)).Interface().(proto.Message)
-	if !ok {
-		return nil, fmt.Errorf("failed to create message from type: %v", st)
-	}
-
-	exts := proto.RegisteredExtensions(m)
-	out := make([]int32, 0, len(exts))
-	for id := range exts {
-		out = append(out, id)
-	}
-	return out, nil
-}
-
-// fileDescWithDependencies returns a slice of serialized fileDescriptors in
-// wire format ([]byte). The fileDescriptors will include fd and all the
-// transitive dependencies of fd with names not in sentFileDescriptors.
-func fileDescWithDependencies(fd *dpb.FileDescriptorProto, sentFileDescriptors map[string]bool) ([][]byte, error) {
-	r := [][]byte{}
-	queue := []*dpb.FileDescriptorProto{fd}
-	for len(queue) > 0 {
-		currentfd := queue[0]
-		queue = queue[1:]
-		if sent := sentFileDescriptors[currentfd.GetName()]; len(r) == 0 || !sent {
-			sentFileDescriptors[currentfd.GetName()] = true
-			currentfdEncoded, err := proto.Marshal(currentfd)
-			if err != nil {
-				return nil, err
-			}
-			r = append(r, currentfdEncoded)
-		}
-		for _, dep := range currentfd.Dependency {
-			fdenc := proto.FileDescriptor(dep)
-			fdDep, err := decodeFileDesc(fdenc)
-			if err != nil {
-				continue
-			}
-			queue = append(queue, fdDep)
-		}
-	}
-	return r, nil
-}
-
-// fileDescEncodingByFilename finds the file descriptor for given filename,
-// finds all of its previously unsent transitive dependencies, does marshalling
-// on them, and returns the marshalled result.
-func (s *serverReflectionServer) fileDescEncodingByFilename(name string, sentFileDescriptors map[string]bool) ([][]byte, error) {
-	enc := proto.FileDescriptor(name)
-	if enc == nil {
-		return nil, fmt.Errorf("unknown file: %v", name)
-	}
-	fd, err := decodeFileDesc(enc)
-	if err != nil {
-		return nil, err
-	}
-	return fileDescWithDependencies(fd, sentFileDescriptors)
-}
-
-// parseMetadata finds the file descriptor bytes specified meta.
-// For SupportPackageIsVersion4, m is the name of the proto file, we
-// call proto.FileDescriptor to get the byte slice.
-// For SupportPackageIsVersion3, m is a byte slice itself.
-func parseMetadata(meta interface{}) ([]byte, bool) {
-	// Check if meta is the file name.
-	if fileNameForMeta, ok := meta.(string); ok {
-		return proto.FileDescriptor(fileNameForMeta), true
-	}
-
-	// Check if meta is the byte slice.
-	if enc, ok := meta.([]byte); ok {
-		return enc, true
-	}
-
-	return nil, false
-}
-
-// fileDescEncodingContainingSymbol finds the file descriptor containing the
-// given symbol, finds all of its previously unsent transitive dependencies,
-// does marshalling on them, and returns the marshalled result. The given symbol
-// can be a type, a service or a method.
-func (s *serverReflectionServer) fileDescEncodingContainingSymbol(name string, sentFileDescriptors map[string]bool) ([][]byte, error) {
-	_, symbols := s.getSymbols()
-	fd := symbols[name]
-	if fd == nil {
-		// Check if it's a type name that was not present in the
-		// transitive dependencies of the registered services.
-		if st, err := typeForName(name); err == nil {
-			fd, err = s.fileDescForType(st)
-			if err != nil {
-				return nil, err
-			}
-		}
-	}
-
-	if fd == nil {
-		return nil, fmt.Errorf("unknown symbol: %v", name)
-	}
-
-	return fileDescWithDependencies(fd, sentFileDescriptors)
-}
-
-// fileDescEncodingContainingExtension finds the file descriptor containing
-// given extension, finds all of its previously unsent transitive dependencies,
-// does marshalling on them, and returns the marshalled result.
-func (s *serverReflectionServer) fileDescEncodingContainingExtension(typeName string, extNum int32, sentFileDescriptors map[string]bool) ([][]byte, error) {
-	st, err := typeForName(typeName)
-	if err != nil {
-		return nil, err
-	}
-	fd, err := fileDescContainingExtension(st, extNum)
-	if err != nil {
-		return nil, err
-	}
-	return fileDescWithDependencies(fd, sentFileDescriptors)
-}
-
-// allExtensionNumbersForTypeName returns all extension numbers for the given type.
-func (s *serverReflectionServer) allExtensionNumbersForTypeName(name string) ([]int32, error) {
-	st, err := typeForName(name)
-	if err != nil {
-		return nil, err
-	}
-	extNums, err := s.allExtensionNumbersForType(st)
-	if err != nil {
-		return nil, err
-	}
-	return extNums, nil
-}
-
-// ServerReflectionInfo is the reflection service handler.
-func (s *serverReflectionServer) ServerReflectionInfo(stream rpb.ServerReflection_ServerReflectionInfoServer) error {
-	sentFileDescriptors := make(map[string]bool)
-	for {
-		in, err := stream.Recv()
-		if err == io.EOF {
-			return nil
-		}
-		if err != nil {
-			return err
-		}
-
-		out := &rpb.ServerReflectionResponse{
-			ValidHost:       in.Host,
-			OriginalRequest: in,
-		}
-		switch req := in.MessageRequest.(type) {
-		case *rpb.ServerReflectionRequest_FileByFilename:
-			b, err := s.fileDescEncodingByFilename(req.FileByFilename, sentFileDescriptors)
-			if err != nil {
-				out.MessageResponse = &rpb.ServerReflectionResponse_ErrorResponse{
-					ErrorResponse: &rpb.ErrorResponse{
-						ErrorCode:    int32(codes.NotFound),
-						ErrorMessage: err.Error(),
-					},
-				}
-			} else {
-				out.MessageResponse = &rpb.ServerReflectionResponse_FileDescriptorResponse{
-					FileDescriptorResponse: &rpb.FileDescriptorResponse{FileDescriptorProto: b},
-				}
-			}
-		case *rpb.ServerReflectionRequest_FileContainingSymbol:
-			b, err := s.fileDescEncodingContainingSymbol(req.FileContainingSymbol, sentFileDescriptors)
-			if err != nil {
-				out.MessageResponse = &rpb.ServerReflectionResponse_ErrorResponse{
-					ErrorResponse: &rpb.ErrorResponse{
-						ErrorCode:    int32(codes.NotFound),
-						ErrorMessage: err.Error(),
-					},
-				}
-			} else {
-				out.MessageResponse = &rpb.ServerReflectionResponse_FileDescriptorResponse{
-					FileDescriptorResponse: &rpb.FileDescriptorResponse{FileDescriptorProto: b},
-				}
-			}
-		case *rpb.ServerReflectionRequest_FileContainingExtension:
-			typeName := req.FileContainingExtension.ContainingType
-			extNum := req.FileContainingExtension.ExtensionNumber
-			b, err := s.fileDescEncodingContainingExtension(typeName, extNum, sentFileDescriptors)
-			if err != nil {
-				out.MessageResponse = &rpb.ServerReflectionResponse_ErrorResponse{
-					ErrorResponse: &rpb.ErrorResponse{
-						ErrorCode:    int32(codes.NotFound),
-						ErrorMessage: err.Error(),
-					},
-				}
-			} else {
-				out.MessageResponse = &rpb.ServerReflectionResponse_FileDescriptorResponse{
-					FileDescriptorResponse: &rpb.FileDescriptorResponse{FileDescriptorProto: b},
-				}
-			}
-		case *rpb.ServerReflectionRequest_AllExtensionNumbersOfType:
-			extNums, err := s.allExtensionNumbersForTypeName(req.AllExtensionNumbersOfType)
-			if err != nil {
-				out.MessageResponse = &rpb.ServerReflectionResponse_ErrorResponse{
-					ErrorResponse: &rpb.ErrorResponse{
-						ErrorCode:    int32(codes.NotFound),
-						ErrorMessage: err.Error(),
-					},
-				}
-			} else {
-				out.MessageResponse = &rpb.ServerReflectionResponse_AllExtensionNumbersResponse{
-					AllExtensionNumbersResponse: &rpb.ExtensionNumberResponse{
-						BaseTypeName:    req.AllExtensionNumbersOfType,
-						ExtensionNumber: extNums,
-					},
-				}
-			}
-		case *rpb.ServerReflectionRequest_ListServices:
-			svcNames, _ := s.getSymbols()
-			serviceResponses := make([]*rpb.ServiceResponse, len(svcNames))
-			for i, n := range svcNames {
-				serviceResponses[i] = &rpb.ServiceResponse{
-					Name: n,
-				}
-			}
-			out.MessageResponse = &rpb.ServerReflectionResponse_ListServicesResponse{
-				ListServicesResponse: &rpb.ListServiceResponse{
-					Service: serviceResponses,
-				},
-			}
-		default:
-			return status.Errorf(codes.InvalidArgument, "invalid MessageRequest: %v", in.MessageRequest)
-		}
-
-		if err := stream.Send(out); err != nil {
-			return err
-		}
-	}
-}

reflection_old.go

@@ -0,0 +1,489 @@
+//go:build ignore
+// +build ignore
+
+/*
+ *
+ * Copyright 2016 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+/*
+Package reflection implements server reflection service.
+
+The service implemented is defined in:
+https://github.com/grpc/grpc/blob/master/src/proto/grpc/reflection/v1alpha/reflection.proto.
+
+To register server reflection on a gRPC server:
+
+	import "google.golang.org/grpc/reflection"
+
+	s := grpc.NewServer()
+	pb.RegisterYourOwnServer(s, &server{})
+
+	// Register reflection service on gRPC server.
+	reflection.Register(s)
+
+	s.Serve(lis)
+*/
+package grpc
+
+import (
+	"bytes"
+	"compress/gzip"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"reflect"
+	"sort"
+	"sync"
+
+	"github.com/golang/protobuf/proto"
+	dpb "github.com/golang/protobuf/protoc-gen-go/descriptor"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+	rpb "google.golang.org/grpc/reflection/grpc_reflection_v1alpha"
+	"google.golang.org/grpc/status"
+)
+
+type serverReflectionServer struct {
+	rpb.UnimplementedServerReflectionServer
+	s *grpc.Server
+
+	initSymbols  sync.Once
+	serviceNames []string
+	symbols      map[string]*dpb.FileDescriptorProto // map of fully-qualified names to files
+}
+
+// Register registers the server reflection service on the given gRPC server.
+func Register(s *grpc.Server) {
+	rpb.RegisterServerReflectionServer(s, &serverReflectionServer{
+		s: s,
+	})
+}
+
+// protoMessage is used for type assertion on proto messages.
+// Generated proto message implements function Descriptor(), but Descriptor()
+// is not part of interface proto.Message. This interface is needed to
+// call Descriptor().
+type protoMessage interface {
+	Descriptor() ([]byte, []int)
+}
+
+func (s *serverReflectionServer) getSymbols() (svcNames []string, symbolIndex map[string]*dpb.FileDescriptorProto) {
+	s.initSymbols.Do(func() {
+		serviceInfo := s.s.GetServiceInfo()
+
+		s.symbols = map[string]*dpb.FileDescriptorProto{}
+		s.serviceNames = make([]string, 0, len(serviceInfo))
+		processed := map[string]struct{}{}
+		for svc, info := range serviceInfo {
+			s.serviceNames = append(s.serviceNames, svc)
+			fdenc, ok := parseMetadata(info.Metadata)
+			if !ok {
+				continue
+			}
+			fd, err := decodeFileDesc(fdenc)
+			if err != nil {
+				continue
+			}
+			s.processFile(fd, processed)
+		}
+		sort.Strings(s.serviceNames)
+	})
+
+	return s.serviceNames, s.symbols
+}
+
+func (s *serverReflectionServer) processFile(fd *dpb.FileDescriptorProto, processed map[string]struct{}) {
+	filename := fd.GetName()
+	if _, ok := processed[filename]; ok {
+		return
+	}
+	processed[filename] = struct{}{}
+
+	prefix := fd.GetPackage()
+
+	for _, msg := range fd.MessageType {
+		s.processMessage(fd, prefix, msg)
+	}
+	for _, en := range fd.EnumType {
+		s.processEnum(fd, prefix, en)
+	}
+	for _, ext := range fd.Extension {
+		s.processField(fd, prefix, ext)
+	}
+	for _, svc := range fd.Service {
+		svcName := fqn(prefix, svc.GetName())
+		s.symbols[svcName] = fd
+		for _, meth := range svc.Method {
+			name := fqn(svcName, meth.GetName())
+			s.symbols[name] = fd
+		}
+	}
+
+	for _, dep := range fd.Dependency {
+		fdenc := proto.FileDescriptor(dep)
+		fdDep, err := decodeFileDesc(fdenc)
+		if err != nil {
+			continue
+		}
+		s.processFile(fdDep, processed)
+	}
+}
+
+func (s *serverReflectionServer) processMessage(fd *dpb.FileDescriptorProto, prefix string, msg *dpb.DescriptorProto) {
+	msgName := fqn(prefix, msg.GetName())
+	s.symbols[msgName] = fd
+
+	for _, nested := range msg.NestedType {
+		s.processMessage(fd, msgName, nested)
+	}
+	for _, en := range msg.EnumType {
+		s.processEnum(fd, msgName, en)
+	}
+	for _, ext := range msg.Extension {
+		s.processField(fd, msgName, ext)
+	}
+	for _, fld := range msg.Field {
+		s.processField(fd, msgName, fld)
+	}
+	for _, oneof := range msg.OneofDecl {
+		oneofName := fqn(msgName, oneof.GetName())
+		s.symbols[oneofName] = fd
+	}
+}
+
+func (s *serverReflectionServer) processEnum(fd *dpb.FileDescriptorProto, prefix string, en *dpb.EnumDescriptorProto) {
+	enName := fqn(prefix, en.GetName())
+	s.symbols[enName] = fd
+
+	for _, val := range en.Value {
+		valName := fqn(enName, val.GetName())
+		s.symbols[valName] = fd
+	}
+}
+
+func (s *serverReflectionServer) processField(fd *dpb.FileDescriptorProto, prefix string, fld *dpb.FieldDescriptorProto) {
+	fldName := fqn(prefix, fld.GetName())
+	s.symbols[fldName] = fd
+}
+
+func fqn(prefix, name string) string {
+	if prefix == "" {
+		return name
+	}
+	return prefix + "." + name
+}
+
+// fileDescForType gets the file descriptor for the given type.
+// The given type should be a proto message.
+func (s *serverReflectionServer) fileDescForType(st reflect.Type) (*dpb.FileDescriptorProto, error) {
+	m, ok := reflect.Zero(reflect.PtrTo(st)).Interface().(protoMessage)
+	if !ok {
+		return nil, fmt.Errorf("failed to create message from type: %v", st)
+	}
+	enc, _ := m.Descriptor()
+
+	return decodeFileDesc(enc)
+}
+
+// decodeFileDesc does decompression and unmarshalling on the given
+// file descriptor byte slice.
+func decodeFileDesc(enc []byte) (*dpb.FileDescriptorProto, error) {
+	raw, err := decompress(enc)
+	if err != nil {
+		return nil, fmt.Errorf("failed to decompress enc: %v", err)
+	}
+
+	fd := new(dpb.FileDescriptorProto)
+	if err := proto.Unmarshal(raw, fd); err != nil {
+		return nil, fmt.Errorf("bad descriptor: %v", err)
+	}
+	return fd, nil
+}
+
+// decompress does gzip decompression.
+func decompress(b []byte) ([]byte, error) {
+	r, err := gzip.NewReader(bytes.NewReader(b))
+	if err != nil {
+		return nil, fmt.Errorf("bad gzipped descriptor: %v", err)
+	}
+	out, err := ioutil.ReadAll(r)
+	if err != nil {
+		return nil, fmt.Errorf("bad gzipped descriptor: %v", err)
+	}
+	return out, nil
+}
+
+func typeForName(name string) (reflect.Type, error) {
+	pt := proto.MessageType(name)
+	if pt == nil {
+		return nil, fmt.Errorf("unknown type: %q", name)
+	}
+	st := pt.Elem()
+
+	return st, nil
+}
+
+func fileDescContainingExtension(st reflect.Type, ext int32) (*dpb.FileDescriptorProto, error) {
+	m, ok := reflect.Zero(reflect.PtrTo(st)).Interface().(proto.Message)
+	if !ok {
+		return nil, fmt.Errorf("failed to create message from type: %v", st)
+	}
+
+	var extDesc *proto.ExtensionDesc
+	for id, desc := range proto.RegisteredExtensions(m) {
+		if id == ext {
+			extDesc = desc
+			break
+		}
+	}
+
+	if extDesc == nil {
+		return nil, fmt.Errorf("failed to find registered extension for extension number %v", ext)
+	}
+
+	return decodeFileDesc(proto.FileDescriptor(extDesc.Filename))
+}
+
+func (s *serverReflectionServer) allExtensionNumbersForType(st reflect.Type) ([]int32, error) {
+	m, ok := reflect.Zero(reflect.PtrTo(st)).Interface().(proto.Message)
+	if !ok {
+		return nil, fmt.Errorf("failed to create message from type: %v", st)
+	}
+
+	exts := proto.RegisteredExtensions(m)
+	out := make([]int32, 0, len(exts))
+	for id := range exts {
+		out = append(out, id)
+	}
+	return out, nil
+}
+
+// fileDescWithDependencies returns a slice of serialized fileDescriptors in
+// wire format ([]byte). The fileDescriptors will include fd and all the
+// transitive dependencies of fd with names not in sentFileDescriptors.
+func fileDescWithDependencies(fd *dpb.FileDescriptorProto, sentFileDescriptors map[string]bool) ([][]byte, error) {
+	r := [][]byte{}
+	queue := []*dpb.FileDescriptorProto{fd}
+	for len(queue) > 0 {
+		currentfd := queue[0]
+		queue = queue[1:]
+		if sent := sentFileDescriptors[currentfd.GetName()]; len(r) == 0 || !sent {
+			sentFileDescriptors[currentfd.GetName()] = true
+			currentfdEncoded, err := proto.Marshal(currentfd)
+			if err != nil {
+				return nil, err
+			}
+			r = append(r, currentfdEncoded)
+		}
+		for _, dep := range currentfd.Dependency {
+			fdenc := proto.FileDescriptor(dep)
+			fdDep, err := decodeFileDesc(fdenc)
+			if err != nil {
+				continue
+			}
+			queue = append(queue, fdDep)
+		}
+	}
+	return r, nil
+}
+
+// fileDescEncodingByFilename finds the file descriptor for given filename,
+// finds all of its previously unsent transitive dependencies, does marshalling
+// on them, and returns the marshalled result.
+func (s *serverReflectionServer) fileDescEncodingByFilename(name string, sentFileDescriptors map[string]bool) ([][]byte, error) {
+	enc := proto.FileDescriptor(name)
+	if enc == nil {
+		return nil, fmt.Errorf("unknown file: %v", name)
+	}
+	fd, err := decodeFileDesc(enc)
+	if err != nil {
+		return nil, err
+	}
+	return fileDescWithDependencies(fd, sentFileDescriptors)
+}
+
+// parseMetadata finds the file descriptor bytes specified meta.
+// For SupportPackageIsVersion4, m is the name of the proto file, we
+// call proto.FileDescriptor to get the byte slice.
+// For SupportPackageIsVersion3, m is a byte slice itself.
+func parseMetadata(meta interface{}) ([]byte, bool) {
+	// Check if meta is the file name.
+	if fileNameForMeta, ok := meta.(string); ok {
+		return proto.FileDescriptor(fileNameForMeta), true
+	}
+
+	// Check if meta is the byte slice.
+	if enc, ok := meta.([]byte); ok {
+		return enc, true
+	}
+
+	return nil, false
+}
+
+// fileDescEncodingContainingSymbol finds the file descriptor containing the
+// given symbol, finds all of its previously unsent transitive dependencies,
+// does marshalling on them, and returns the marshalled result. The given symbol
+// can be a type, a service or a method.
+func (s *serverReflectionServer) fileDescEncodingContainingSymbol(name string, sentFileDescriptors map[string]bool) ([][]byte, error) {
+	_, symbols := s.getSymbols()
+	fd := symbols[name]
+	if fd == nil {
+		// Check if it's a type name that was not present in the
+		// transitive dependencies of the registered services.
+		if st, err := typeForName(name); err == nil {
+			fd, err = s.fileDescForType(st)
+			if err != nil {
+				return nil, err
+			}
+		}
+	}
+
+	if fd == nil {
+		return nil, fmt.Errorf("unknown symbol: %v", name)
+	}
+
+	return fileDescWithDependencies(fd, sentFileDescriptors)
+}
+
+// fileDescEncodingContainingExtension finds the file descriptor containing
+// given extension, finds all of its previously unsent transitive dependencies,
+// does marshalling on them, and returns the marshalled result.
+func (s *serverReflectionServer) fileDescEncodingContainingExtension(typeName string, extNum int32, sentFileDescriptors map[string]bool) ([][]byte, error) {
+	st, err := typeForName(typeName)
+	if err != nil {
+		return nil, err
+	}
+	fd, err := fileDescContainingExtension(st, extNum)
+	if err != nil {
+		return nil, err
+	}
+	return fileDescWithDependencies(fd, sentFileDescriptors)
+}
+
+// allExtensionNumbersForTypeName returns all extension numbers for the given type.
+func (s *serverReflectionServer) allExtensionNumbersForTypeName(name string) ([]int32, error) {
+	st, err := typeForName(name)
+	if err != nil {
+		return nil, err
+	}
+	extNums, err := s.allExtensionNumbersForType(st)
+	if err != nil {
+		return nil, err
+	}
+	return extNums, nil
+}
+
+// ServerReflectionInfo is the reflection service handler.
+func (s *serverReflectionServer) ServerReflectionInfo(stream rpb.ServerReflection_ServerReflectionInfoServer) error {
+	sentFileDescriptors := make(map[string]bool)
+	for {
+		in, err := stream.Recv()
+		if err == io.EOF {
+			return nil
+		}
+		if err != nil {
+			return err
+		}
+
+		out := &rpb.ServerReflectionResponse{
+			ValidHost:       in.Host,
+			OriginalRequest: in,
+		}
+		switch req := in.MessageRequest.(type) {
+		case *rpb.ServerReflectionRequest_FileByFilename:
+			b, err := s.fileDescEncodingByFilename(req.FileByFilename, sentFileDescriptors)
+			if err != nil {
+				out.MessageResponse = &rpb.ServerReflectionResponse_ErrorResponse{
+					ErrorResponse: &rpb.ErrorResponse{
+						ErrorCode:    int32(codes.NotFound),
+						ErrorMessage: err.Error(),
+					},
+				}
+			} else {
+				out.MessageResponse = &rpb.ServerReflectionResponse_FileDescriptorResponse{
+					FileDescriptorResponse: &rpb.FileDescriptorResponse{FileDescriptorProto: b},
+				}
+			}
+		case *rpb.ServerReflectionRequest_FileContainingSymbol:
+			b, err := s.fileDescEncodingContainingSymbol(req.FileContainingSymbol, sentFileDescriptors)
+			if err != nil {
+				out.MessageResponse = &rpb.ServerReflectionResponse_ErrorResponse{
+					ErrorResponse: &rpb.ErrorResponse{
+						ErrorCode:    int32(codes.NotFound),
+						ErrorMessage: err.Error(),
+					},
+				}
+			} else {
+				out.MessageResponse = &rpb.ServerReflectionResponse_FileDescriptorResponse{
+					FileDescriptorResponse: &rpb.FileDescriptorResponse{FileDescriptorProto: b},
+				}
+			}
+		case *rpb.ServerReflectionRequest_FileContainingExtension:
+			typeName := req.FileContainingExtension.ContainingType
+			extNum := req.FileContainingExtension.ExtensionNumber
+			b, err := s.fileDescEncodingContainingExtension(typeName, extNum, sentFileDescriptors)
+			if err != nil {
+				out.MessageResponse = &rpb.ServerReflectionResponse_ErrorResponse{
+					ErrorResponse: &rpb.ErrorResponse{
+						ErrorCode:    int32(codes.NotFound),
+						ErrorMessage: err.Error(),
+					},
+				}
+			} else {
+				out.MessageResponse = &rpb.ServerReflectionResponse_FileDescriptorResponse{
+					FileDescriptorResponse: &rpb.FileDescriptorResponse{FileDescriptorProto: b},
+				}
+			}
+		case *rpb.ServerReflectionRequest_AllExtensionNumbersOfType:
+			extNums, err := s.allExtensionNumbersForTypeName(req.AllExtensionNumbersOfType)
+			if err != nil {
+				out.MessageResponse = &rpb.ServerReflectionResponse_ErrorResponse{
+					ErrorResponse: &rpb.ErrorResponse{
+						ErrorCode:    int32(codes.NotFound),
+						ErrorMessage: err.Error(),
+					},
+				}
+			} else {
+				out.MessageResponse = &rpb.ServerReflectionResponse_AllExtensionNumbersResponse{
+					AllExtensionNumbersResponse: &rpb.ExtensionNumberResponse{
+						BaseTypeName:    req.AllExtensionNumbersOfType,
+						ExtensionNumber: extNums,
+					},
+				}
+			}
+		case *rpb.ServerReflectionRequest_ListServices:
+			svcNames, _ := s.getSymbols()
+			serviceResponses := make([]*rpb.ServiceResponse, len(svcNames))
+			for i, n := range svcNames {
+				serviceResponses[i] = &rpb.ServiceResponse{
+					Name: n,
+				}
+			}
+			out.MessageResponse = &rpb.ServerReflectionResponse_ListServicesResponse{
+				ListServicesResponse: &rpb.ListServiceResponse{
+					Service: serviceResponses,
+				},
+			}
+		default:
+			return status.Errorf(codes.InvalidArgument, "invalid MessageRequest: %v", in.MessageRequest)
+		}
+
+		if err := stream.Send(out); err != nil {
+			return err
+		}
+	}
+}

reflection_test.go

@@ -0,0 +1,62 @@
+package grpc
+
+import (
+	"fmt"
+	"testing"
+
+	_ "go.unistack.org/micro-server-grpc/v3/proto"
+	"go.unistack.org/micro/v3/server"
+	"google.golang.org/grpc"
+	"google.golang.org/protobuf/reflect/protoreflect"
+	"google.golang.org/protobuf/reflect/protoregistry"
+)
+
+type reflector struct{}
+
+func (r *reflector) FindFileByPath(path string) (protoreflect.FileDescriptor, error) {
+	fd, err := protoregistry.GlobalFiles.FindFileByPath(path)
+	if err != nil {
+		fmt.Printf("err: %v\n", err)
+		return nil, err
+	}
+	return fd, nil
+}
+
+func (r *reflector) FindDescriptorByName(name protoreflect.FullName) (protoreflect.Descriptor, error) {
+	fd, err := protoregistry.GlobalFiles.FindDescriptorByName(name)
+	if err != nil {
+		return nil, err
+	}
+	return fd, nil
+}
+
+func (r *reflector) GetServiceInfo() map[string]grpc.ServiceInfo {
+	fmt.Printf("GetServiceInfo\n")
+	return nil
+}
+
+func (r *reflector) FindExtensionByName(field protoreflect.FullName) (protoreflect.ExtensionType, error) {
+	fmt.Printf("FindExtensionByName field %#+v\n", field)
+	return nil, nil
+}
+
+func (r *reflector) FindExtensionByNumber(message protoreflect.FullName, field protoreflect.FieldNumber) (protoreflect.ExtensionType, error) {
+	fmt.Printf("FindExtensionByNumber message %#+v field %#+v\n", message, field)
+	return nil, nil
+}
+
+func (r *reflector) RangeExtensionsByMessage(message protoreflect.FullName, f func(protoreflect.ExtensionType) bool) {
+	fmt.Printf("RangeExtensionsByMessage\n")
+}
+
+func TestReflector(t *testing.T) {
+	srv := NewServer(Reflection(&reflector{}), server.Address(":12345"))
+	if err := srv.Init(); err != nil {
+		t.Fatal(err)
+	}
+	if err := srv.Start(); err != nil {
+		t.Fatal(err)
+	}
+	t.Logf("addr %s", srv.Options().Address)
+	select {}
+}

request.go

@@ -3,15 +3,12 @@ package grpc
 import (
 	"io"
 
-	"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"
-	"github.com/unistack-org/micro/v3/server"
+	"go.unistack.org/micro/v3/server"
 )
 
-var (
+var _ server.Request = &rpcRequest{}
-	_ server.Request = &rpcRequest{}
-	_ server.Message = &rpcMessage{}
-)
 
 type rpcRequest struct {
 	rw          io.ReadWriter
@@ -22,19 +19,9 @@ type rpcRequest struct {
 	endpoint    string
 	contentType string
 	service     string
-	body        []byte
 	stream      bool
 }
 
-type rpcMessage struct {
-	payload     interface{}
-	codec       codec.Codec
-	header      metadata.Metadata
-	topic       string
-	contentType string
-	body        []byte
-}
-
 func (r *rpcRequest) ContentType() string {
 	return r.contentType
 }
@@ -74,27 +61,3 @@ func (r *rpcRequest) Stream() bool {
 func (r *rpcRequest) Body() interface{} {
 	return r.payload
 }
-
-func (r *rpcMessage) ContentType() string {
-	return r.contentType
-}
-
-func (r *rpcMessage) Topic() string {
-	return r.topic
-}
-
-func (r *rpcMessage) Payload() interface{} {
-	return r.payload
-}
-
-func (r *rpcMessage) Header() metadata.Metadata {
-	return r.header
-}
-
-func (r *rpcMessage) Body() []byte {
-	return r.body
-}
-
-func (r *rpcMessage) Codec() codec.Codec {
-	return r.codec
-}

response.go

@@ -3,9 +3,9 @@ package grpc
 import (
 	"io"
 
-	"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"
-	"github.com/unistack-org/micro/v3/server"
+	"go.unistack.org/micro/v3/server"
 )
 
 var _ server.Response = &rpcResponse{}

server.go

@@ -14,7 +14,7 @@ import (
 	"unicode"
 	"unicode/utf8"
 
-	"github.com/unistack-org/micro/v3/server"
+	"go.unistack.org/micro/v3/server"
 )
 
 // Precompute the reflect type for error. Can't use error directly

stream.go

@@ -3,7 +3,7 @@ package grpc
 import (
 	"context"
 
-	"github.com/unistack-org/micro/v3/server"
+	"go.unistack.org/micro/v3/server"
 	"google.golang.org/grpc"
 )
 

subscriber.go

@@ -4,17 +4,48 @@ import (
 	"context"
 	"fmt"
 	"reflect"
-	"runtime/debug"
 	"strings"
 
-	"github.com/unistack-org/micro/v3/broker"
+	"go.unistack.org/micro/v3/broker"
-	"github.com/unistack-org/micro/v3/errors"
+	"go.unistack.org/micro/v3/codec"
-	"github.com/unistack-org/micro/v3/logger"
+
-	"github.com/unistack-org/micro/v3/metadata"
+	// "go.unistack.org/micro/v3/errors"
-	"github.com/unistack-org/micro/v3/register"
+	// "go.unistack.org/micro/v3/logger"
-	"github.com/unistack-org/micro/v3/server"
+	"go.unistack.org/micro/v3/metadata"
+	"go.unistack.org/micro/v3/register"
+	"go.unistack.org/micro/v3/server"
 )
 
+var _ server.Message = &rpcMessage{}
+
+type rpcMessage struct {
+	payload     interface{}
+	codec       codec.Codec
+	header      metadata.Metadata
+	topic       string
+	contentType string
+}
+
+func (r *rpcMessage) ContentType() string {
+	return r.contentType
+}
+
+func (r *rpcMessage) Topic() string {
+	return r.topic
+}
+
+func (r *rpcMessage) Body() interface{} {
+	return r.payload
+}
+
+func (r *rpcMessage) Header() metadata.Metadata {
+	return r.header
+}
+
+func (r *rpcMessage) Codec() codec.Codec {
+	return r.codec
+}
+
 type handler struct {
 	reqType reflect.Type
 	ctxType reflect.Type
@@ -102,18 +133,8 @@ func newSubscriber(topic string, sub interface{}, opts ...server.SubscriberOptio
 	}
 }
 
-func (g *grpcServer) createSubHandler(sb *subscriber, opts server.Options) broker.Handler {
+func (g *Server) createSubHandler(sb *subscriber, opts server.Options) broker.Handler {
 	return func(p broker.Event) (err error) {
-		defer func() {
-			if r := recover(); r != nil {
-				if g.opts.Logger.V(logger.ErrorLevel) {
-					g.opts.Logger.Error(g.opts.Context, "panic recovered: ", r)
-					g.opts.Logger.Error(g.opts.Context, string(debug.Stack()))
-				}
-				err = errors.InternalServerError(g.opts.Name+".subscriber", "panic recovered: %v", r)
-			}
-		}()
-
 		msg := p.Message()
 		// if we don't have headers, create empty map
 		if msg.Header == nil {
@@ -122,8 +143,8 @@ func (g *grpcServer) createSubHandler(sb *subscriber, opts server.Options) broke
 
 		ct := msg.Header["Content-Type"]
 		if len(ct) == 0 {
-			msg.Header["Content-Type"] = defaultContentType
+			msg.Header["Content-Type"] = DefaultContentType
-			ct = defaultContentType
+			ct = DefaultContentType
 		}
 		cf, err := g.newCodec(ct)
 		if err != nil {
@@ -132,9 +153,6 @@ func (g *grpcServer) createSubHandler(sb *subscriber, opts server.Options) broke
 
 		hdr := make(map[string]string, len(msg.Header))
 		for k, v := range msg.Header {
-			if k == "Content-Type" {
-				continue
-			}
 			hdr[k] = v
 		}
 
@@ -171,7 +189,7 @@ func (g *grpcServer) createSubHandler(sb *subscriber, opts server.Options) broke
 					vals = append(vals, reflect.ValueOf(ctx))
 				}
 
-				vals = append(vals, reflect.ValueOf(msg.Payload()))
+				vals = append(vals, reflect.ValueOf(msg.Body()))
 
 				returnValues := handler.method.Call(vals)
 				if rerr := returnValues[0].Interface(); rerr != nil {
@@ -196,7 +214,6 @@ func (g *grpcServer) createSubHandler(sb *subscriber, opts server.Options) broke
 					contentType: ct,
 					payload:     req.Interface(),
 					header:      msg.Header,
-					body:        msg.Body,
 				})
 				results <- cerr
 			}()