Bump google.golang.org/grpc from 1.52.3 to 1.53.0

Bumps [google.golang.org/grpc](https://github.com/grpc/grpc-go) from 1.52.3 to 1.53.0.
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](https://github.com/grpc/grpc-go/compare/v1.52.3...v1.53.0)

---
updated-dependencies:
- dependency-name: google.golang.org/grpc
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,24 @@
+---
+name: Bug report
+about: For reporting bugs in go-micro
+title: "[BUG]"
+labels: ''
+assignees: ''
+
+---
+
+**Describe the bug**
+
+1. What are you trying to do?
+2. What did you expect to happen?
+3. What happens instead?
+
+**How to reproduce the bug:**
+
+If possible, please include a minimal code snippet here.
+
+**Environment:**
+Go Version: please paste `go version` output here
+```
+please paste `go env` output here
+```

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

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

.github/ISSUE_TEMPLATE/question.md

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

.github/PULL_REQUEST_TEMPLATE.md

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

.github/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/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

@@ -0,0 +1,47 @@
+name: build
+on:
+ push:
+    branches:
+    - master
+    - v3
+jobs:
+  test:
+    name: test
+    runs-on: ubuntu-latest
+    steps:
+    - name: setup
+      uses: actions/setup-go@v3
+      with:
+        go-version: 1.17
+    - name: checkout
+      uses: actions/checkout@v3
+    - name: cache
+      uses: actions/cache@v3
+      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@v3
+      - name: lint
+        uses: golangci/golangci-lint-action@v3.4.0
+        continue-on-error: true
+        with:
+          # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.
+          version: v1.30
+          # Optional: working directory, useful for monorepos
+          # working-directory: somedir
+          # Optional: golangci-lint command line arguments.
+          # args: --issues-exit-code=0
+          # Optional: show only new issues if it's a pull request. The default value is `false`.
+          # only-new-issues: true

.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

@@ -0,0 +1,47 @@
+name: prbuild
+on:
+  pull_request:
+    branches:
+    - master
+    - v3
+jobs:
+  test:
+    name: test
+    runs-on: ubuntu-latest
+    steps:
+    - name: setup
+      uses: actions/setup-go@v3
+      with:
+        go-version: 1.17
+    - name: checkout
+      uses: actions/checkout@v3
+    - name: cache
+      uses: actions/cache@v3
+      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@v3
+      - name: lint
+        uses: golangci/golangci-lint-action@v3.4.0
+        continue-on-error: true
+        with:
+          # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.
+          version: v1.30
+          # Optional: working directory, useful for monorepos
+          # working-directory: somedir
+          # Optional: golangci-lint command line arguments.
+          # args: --issues-exit-code=0
+          # Optional: show only new issues if it's a pull request. The default value is `false`.
+          # only-new-issues: true

.synced

@@ -0,0 +1 @@
+7e753b1f84b06797ce8c4be8e4b1941b45f8bbb7

LICENSE

@@ -0,0 +1,191 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
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+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
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+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
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+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
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+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
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+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
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+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
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+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   Copyright 2020 Unistack LLC.
+
+   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.

generate.go

@@ -0,0 +1,3 @@
+package service
+
+//go:generate protoc -I./proto -I. --go-grpc_out=paths=source_relative:./proto --go_out=paths=source_relative:./proto --go-micro_out=components=micro|rpc,standalone=true,paths=source_relative:./micro proto/broker.proto

go.mod

@@ -1,7 +1,9 @@
-module github.com/micro/go-plugins/broker/service/v2
+module go.unistack.org/micro-broker-service/v3
 
-go 1.13
+go 1.16
 
-require github.com/micro/go-micro/v2 v2.9.1-0.20200716153311-f9bf56239306
-
-replace github.com/coreos/etcd => github.com/ozonru/etcd v3.3.20-grpc1.27-origmodule+incompatible
+require (
+	go.unistack.org/micro/v3 v3.10.11
+	google.golang.org/grpc v1.53.0
+	google.golang.org/protobuf v1.28.1
+)

micro/broker_micro.pb.go

@@ -0,0 +1,68 @@
+// Code generated by protoc-gen-go-micro. DO NOT EDIT.
+// protoc-gen-go-micro version: v3.5.3
+// source: broker.proto
+
+package servicepb
+
+import (
+	context "context"
+	proto "go.unistack.org/micro-broker-service/v3/proto"
+	api "go.unistack.org/micro/v3/api"
+	client "go.unistack.org/micro/v3/client"
+)
+
+var (
+	BrokerServiceName = "BrokerService"
+
+	BrokerServiceEndpoints = []api.Endpoint{}
+)
+
+func NewBrokerServiceEndpoints() []api.Endpoint {
+	return BrokerServiceEndpoints
+}
+
+type BrokerServiceClient interface {
+	Publish(ctx context.Context, req *proto.PublishRequest, opts ...client.CallOption) (*proto.PublishResponse, error)
+	BatchPublish(ctx context.Context, req *proto.BatchPublishRequest, opts ...client.CallOption) (*proto.BatchPublishResponse, error)
+	Subscribe(ctx context.Context, req *proto.SubscribeRequest, opts ...client.CallOption) (BrokerService_SubscribeClient, error)
+	BatchSubscribe(ctx context.Context, req *proto.BatchSubscribeRequest, opts ...client.CallOption) (BrokerService_BatchSubscribeClient, error)
+}
+
+type BrokerService_SubscribeClient interface {
+	Context() context.Context
+	SendMsg(msg interface{}) error
+	RecvMsg(msg interface{}) error
+	Close() error
+	Recv() (*proto.Message, error)
+}
+
+type BrokerService_BatchSubscribeClient interface {
+	Context() context.Context
+	SendMsg(msg interface{}) error
+	RecvMsg(msg interface{}) error
+	Close() error
+	Recv() (*proto.Message, error)
+}
+
+type BrokerServiceServer interface {
+	Publish(ctx context.Context, req *proto.PublishRequest, rsp *proto.PublishResponse) error
+	BatchPublish(ctx context.Context, req *proto.BatchPublishRequest, rsp *proto.BatchPublishResponse) error
+	Subscribe(ctx context.Context, req *proto.SubscribeRequest, stream BrokerService_SubscribeStream) error
+	BatchSubscribe(ctx context.Context, req *proto.BatchSubscribeRequest, stream BrokerService_BatchSubscribeStream) error
+}
+
+type BrokerService_SubscribeStream interface {
+	Context() context.Context
+	SendMsg(msg interface{}) error
+	RecvMsg(msg interface{}) error
+	Close() error
+	Send(msg *proto.Message) error
+}
+
+type BrokerService_BatchSubscribeStream interface {
+	Context() context.Context
+	SendMsg(msg interface{}) error
+	RecvMsg(msg interface{}) error
+	Close() error
+	Send(msg *proto.Message) error
+}

micro/broker_micro_rpc.pb.go

@@ -0,0 +1,212 @@
+// Code generated by protoc-gen-go-micro. DO NOT EDIT.
+// protoc-gen-go-micro version: v3.5.3
+// source: broker.proto
+
+package servicepb
+
+import (
+	context "context"
+	proto "go.unistack.org/micro-broker-service/v3/proto"
+	api "go.unistack.org/micro/v3/api"
+	client "go.unistack.org/micro/v3/client"
+	server "go.unistack.org/micro/v3/server"
+)
+
+type brokerServiceClient struct {
+	c    client.Client
+	name string
+}
+
+func NewBrokerServiceClient(name string, c client.Client) BrokerServiceClient {
+	return &brokerServiceClient{c: c, name: name}
+}
+
+func (c *brokerServiceClient) Publish(ctx context.Context, req *proto.PublishRequest, opts ...client.CallOption) (*proto.PublishResponse, error) {
+	rsp := &proto.PublishResponse{}
+	err := c.c.Call(ctx, c.c.NewRequest(c.name, "BrokerService.Publish", req), rsp, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return rsp, nil
+}
+
+func (c *brokerServiceClient) BatchPublish(ctx context.Context, req *proto.BatchPublishRequest, opts ...client.CallOption) (*proto.BatchPublishResponse, error) {
+	rsp := &proto.BatchPublishResponse{}
+	err := c.c.Call(ctx, c.c.NewRequest(c.name, "BrokerService.BatchPublish", req), rsp, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return rsp, nil
+}
+
+func (c *brokerServiceClient) Subscribe(ctx context.Context, req *proto.SubscribeRequest, opts ...client.CallOption) (BrokerService_SubscribeClient, error) {
+	stream, err := c.c.Stream(ctx, c.c.NewRequest(c.name, "BrokerService.Subscribe", &proto.SubscribeRequest{}), opts...)
+	if err != nil {
+		return nil, err
+	}
+	if err := stream.Send(req); err != nil {
+		return nil, err
+	}
+	return &brokerServiceClientSubscribe{stream}, nil
+}
+
+type brokerServiceClientSubscribe struct {
+	stream client.Stream
+}
+
+func (s *brokerServiceClientSubscribe) Close() error {
+	return s.stream.Close()
+}
+
+func (s *brokerServiceClientSubscribe) Context() context.Context {
+	return s.stream.Context()
+}
+
+func (s *brokerServiceClientSubscribe) SendMsg(msg interface{}) error {
+	return s.stream.Send(msg)
+}
+
+func (s *brokerServiceClientSubscribe) RecvMsg(msg interface{}) error {
+	return s.stream.Recv(msg)
+}
+
+func (s *brokerServiceClientSubscribe) Recv() (*proto.Message, error) {
+	msg := &proto.Message{}
+	if err := s.stream.Recv(msg); err != nil {
+		return nil, err
+	}
+	return msg, nil
+}
+
+func (c *brokerServiceClient) BatchSubscribe(ctx context.Context, req *proto.BatchSubscribeRequest, opts ...client.CallOption) (BrokerService_BatchSubscribeClient, error) {
+	stream, err := c.c.Stream(ctx, c.c.NewRequest(c.name, "BrokerService.BatchSubscribe", &proto.BatchSubscribeRequest{}), opts...)
+	if err != nil {
+		return nil, err
+	}
+	if err := stream.Send(req); err != nil {
+		return nil, err
+	}
+	return &brokerServiceClientBatchSubscribe{stream}, nil
+}
+
+type brokerServiceClientBatchSubscribe struct {
+	stream client.Stream
+}
+
+func (s *brokerServiceClientBatchSubscribe) Close() error {
+	return s.stream.Close()
+}
+
+func (s *brokerServiceClientBatchSubscribe) Context() context.Context {
+	return s.stream.Context()
+}
+
+func (s *brokerServiceClientBatchSubscribe) SendMsg(msg interface{}) error {
+	return s.stream.Send(msg)
+}
+
+func (s *brokerServiceClientBatchSubscribe) RecvMsg(msg interface{}) error {
+	return s.stream.Recv(msg)
+}
+
+func (s *brokerServiceClientBatchSubscribe) Recv() (*proto.Message, error) {
+	msg := &proto.Message{}
+	if err := s.stream.Recv(msg); err != nil {
+		return nil, err
+	}
+	return msg, nil
+}
+
+type brokerServiceServer struct {
+	BrokerServiceServer
+}
+
+func (h *brokerServiceServer) Publish(ctx context.Context, req *proto.PublishRequest, rsp *proto.PublishResponse) error {
+	return h.BrokerServiceServer.Publish(ctx, req, rsp)
+}
+
+func (h *brokerServiceServer) BatchPublish(ctx context.Context, req *proto.BatchPublishRequest, rsp *proto.BatchPublishResponse) error {
+	return h.BrokerServiceServer.BatchPublish(ctx, req, rsp)
+}
+
+func (h *brokerServiceServer) Subscribe(ctx context.Context, stream server.Stream) error {
+	msg := &proto.SubscribeRequest{}
+	if err := stream.Recv(msg); err != nil {
+		return err
+	}
+	return h.BrokerServiceServer.Subscribe(ctx, msg, &brokerServiceSubscribeStream{stream})
+}
+
+type brokerServiceSubscribeStream struct {
+	stream server.Stream
+}
+
+func (s *brokerServiceSubscribeStream) Close() error {
+	return s.stream.Close()
+}
+
+func (s *brokerServiceSubscribeStream) Context() context.Context {
+	return s.stream.Context()
+}
+
+func (s *brokerServiceSubscribeStream) SendMsg(msg interface{}) error {
+	return s.stream.Send(msg)
+}
+
+func (s *brokerServiceSubscribeStream) RecvMsg(msg interface{}) error {
+	return s.stream.Recv(msg)
+}
+
+func (s *brokerServiceSubscribeStream) Send(msg *proto.Message) error {
+	return s.stream.Send(msg)
+}
+
+func (h *brokerServiceServer) BatchSubscribe(ctx context.Context, stream server.Stream) error {
+	msg := &proto.BatchSubscribeRequest{}
+	if err := stream.Recv(msg); err != nil {
+		return err
+	}
+	return h.BrokerServiceServer.BatchSubscribe(ctx, msg, &brokerServiceBatchSubscribeStream{stream})
+}
+
+type brokerServiceBatchSubscribeStream struct {
+	stream server.Stream
+}
+
+func (s *brokerServiceBatchSubscribeStream) Close() error {
+	return s.stream.Close()
+}
+
+func (s *brokerServiceBatchSubscribeStream) Context() context.Context {
+	return s.stream.Context()
+}
+
+func (s *brokerServiceBatchSubscribeStream) SendMsg(msg interface{}) error {
+	return s.stream.Send(msg)
+}
+
+func (s *brokerServiceBatchSubscribeStream) RecvMsg(msg interface{}) error {
+	return s.stream.Recv(msg)
+}
+
+func (s *brokerServiceBatchSubscribeStream) Send(msg *proto.Message) error {
+	return s.stream.Send(msg)
+}
+
+func RegisterBrokerServiceServer(s server.Server, sh BrokerServiceServer, opts ...server.HandlerOption) error {
+	type brokerService interface {
+		Publish(ctx context.Context, req *proto.PublishRequest, rsp *proto.PublishResponse) error
+		BatchPublish(ctx context.Context, req *proto.BatchPublishRequest, rsp *proto.BatchPublishResponse) error
+		Subscribe(ctx context.Context, stream server.Stream) error
+		BatchSubscribe(ctx context.Context, stream server.Stream) error
+	}
+	type BrokerService struct {
+		brokerService
+	}
+	h := &brokerServiceServer{sh}
+	var nopts []server.HandlerOption
+	for _, endpoint := range BrokerServiceEndpoints {
+		nopts = append(nopts, api.WithEndpoint(&endpoint))
+	}
+	return s.Handle(s.NewHandler(&BrokerService{h}, append(nopts, opts...)...))
+}

options.go

@@ -0,0 +1,20 @@
+package service
+
+import (
+	"go.unistack.org/micro/v3/broker"
+	"go.unistack.org/micro/v3/client"
+)
+
+type clientKey struct{}
+
+// Client to call broker service
+func Client(c client.Client) broker.Option {
+	return broker.SetOption(clientKey{}, c)
+}
+
+type serviceKey struct{}
+
+// Service to call broker service
+func Service(name string) broker.Option {
+	return broker.SetOption(serviceKey{}, name)
+}

proto/broker.pb.go

@@ -0,0 +1,587 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.26.0
+// 	protoc        v3.17.3
+// source: broker.proto
+
+package servicepb
+
+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 PublishRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Topic   string   `protobuf:"bytes,1,opt,name=topic,proto3" json:"topic,omitempty"`
+	Message *Message `protobuf:"bytes,2,opt,name=message,proto3" json:"message,omitempty"`
+}
+
+func (x *PublishRequest) Reset() {
+	*x = PublishRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_broker_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *PublishRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*PublishRequest) ProtoMessage() {}
+
+func (x *PublishRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_broker_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 PublishRequest.ProtoReflect.Descriptor instead.
+func (*PublishRequest) Descriptor() ([]byte, []int) {
+	return file_broker_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *PublishRequest) GetTopic() string {
+	if x != nil {
+		return x.Topic
+	}
+	return ""
+}
+
+func (x *PublishRequest) GetMessage() *Message {
+	if x != nil {
+		return x.Message
+	}
+	return nil
+}
+
+type BatchPublishRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Topic   string     `protobuf:"bytes,1,opt,name=topic,proto3" json:"topic,omitempty"`
+	Message []*Message `protobuf:"bytes,2,rep,name=message,proto3" json:"message,omitempty"`
+}
+
+func (x *BatchPublishRequest) Reset() {
+	*x = BatchPublishRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_broker_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *BatchPublishRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*BatchPublishRequest) ProtoMessage() {}
+
+func (x *BatchPublishRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_broker_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 BatchPublishRequest.ProtoReflect.Descriptor instead.
+func (*BatchPublishRequest) Descriptor() ([]byte, []int) {
+	return file_broker_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *BatchPublishRequest) GetTopic() string {
+	if x != nil {
+		return x.Topic
+	}
+	return ""
+}
+
+func (x *BatchPublishRequest) GetMessage() []*Message {
+	if x != nil {
+		return x.Message
+	}
+	return nil
+}
+
+type PublishResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+}
+
+func (x *PublishResponse) Reset() {
+	*x = PublishResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_broker_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *PublishResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*PublishResponse) ProtoMessage() {}
+
+func (x *PublishResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_broker_proto_msgTypes[2]
+	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 PublishResponse.ProtoReflect.Descriptor instead.
+func (*PublishResponse) Descriptor() ([]byte, []int) {
+	return file_broker_proto_rawDescGZIP(), []int{2}
+}
+
+type BatchPublishResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+}
+
+func (x *BatchPublishResponse) Reset() {
+	*x = BatchPublishResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_broker_proto_msgTypes[3]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *BatchPublishResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*BatchPublishResponse) ProtoMessage() {}
+
+func (x *BatchPublishResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_broker_proto_msgTypes[3]
+	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 BatchPublishResponse.ProtoReflect.Descriptor instead.
+func (*BatchPublishResponse) Descriptor() ([]byte, []int) {
+	return file_broker_proto_rawDescGZIP(), []int{3}
+}
+
+type SubscribeRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Topic string `protobuf:"bytes,1,opt,name=topic,proto3" json:"topic,omitempty"`
+	Group string `protobuf:"bytes,2,opt,name=group,proto3" json:"group,omitempty"`
+}
+
+func (x *SubscribeRequest) Reset() {
+	*x = SubscribeRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_broker_proto_msgTypes[4]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *SubscribeRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*SubscribeRequest) ProtoMessage() {}
+
+func (x *SubscribeRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_broker_proto_msgTypes[4]
+	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 SubscribeRequest.ProtoReflect.Descriptor instead.
+func (*SubscribeRequest) Descriptor() ([]byte, []int) {
+	return file_broker_proto_rawDescGZIP(), []int{4}
+}
+
+func (x *SubscribeRequest) GetTopic() string {
+	if x != nil {
+		return x.Topic
+	}
+	return ""
+}
+
+func (x *SubscribeRequest) GetGroup() string {
+	if x != nil {
+		return x.Group
+	}
+	return ""
+}
+
+type BatchSubscribeRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Topic string `protobuf:"bytes,1,opt,name=topic,proto3" json:"topic,omitempty"`
+	Group string `protobuf:"bytes,2,opt,name=group,proto3" json:"group,omitempty"`
+}
+
+func (x *BatchSubscribeRequest) Reset() {
+	*x = BatchSubscribeRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_broker_proto_msgTypes[5]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *BatchSubscribeRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*BatchSubscribeRequest) ProtoMessage() {}
+
+func (x *BatchSubscribeRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_broker_proto_msgTypes[5]
+	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 BatchSubscribeRequest.ProtoReflect.Descriptor instead.
+func (*BatchSubscribeRequest) Descriptor() ([]byte, []int) {
+	return file_broker_proto_rawDescGZIP(), []int{5}
+}
+
+func (x *BatchSubscribeRequest) GetTopic() string {
+	if x != nil {
+		return x.Topic
+	}
+	return ""
+}
+
+func (x *BatchSubscribeRequest) GetGroup() string {
+	if x != nil {
+		return x.Group
+	}
+	return ""
+}
+
+type Message struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Header map[string]string `protobuf:"bytes,1,rep,name=header,proto3" json:"header,omitempty" protobuf_key:"bytes,1,opt,name=key,proto3" protobuf_val:"bytes,2,opt,name=value,proto3"`
+	Body   []byte            `protobuf:"bytes,2,opt,name=body,proto3" json:"body,omitempty"`
+}
+
+func (x *Message) Reset() {
+	*x = Message{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_broker_proto_msgTypes[6]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Message) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Message) ProtoMessage() {}
+
+func (x *Message) ProtoReflect() protoreflect.Message {
+	mi := &file_broker_proto_msgTypes[6]
+	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 Message.ProtoReflect.Descriptor instead.
+func (*Message) Descriptor() ([]byte, []int) {
+	return file_broker_proto_rawDescGZIP(), []int{6}
+}
+
+func (x *Message) GetHeader() map[string]string {
+	if x != nil {
+		return x.Header
+	}
+	return nil
+}
+
+func (x *Message) GetBody() []byte {
+	if x != nil {
+		return x.Body
+	}
+	return nil
+}
+
+var File_broker_proto protoreflect.FileDescriptor
+
+var file_broker_proto_rawDesc = []byte{
+	0x0a, 0x0c, 0x62, 0x72, 0x6f, 0x6b, 0x65, 0x72, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x09,
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+	0x63, 0x72, 0x69, 0x62, 0x65, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x12, 0x2e, 0x73,
+	0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x70, 0x62, 0x2e, 0x4d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65,
+	0x22, 0x00, 0x30, 0x01, 0x42, 0x39, 0x5a, 0x37, 0x67, 0x6f, 0x2e, 0x75, 0x6e, 0x69, 0x73, 0x74,
+	0x61, 0x63, 0x6b, 0x2e, 0x6f, 0x72, 0x67, 0x2f, 0x6d, 0x69, 0x63, 0x72, 0x6f, 0x2d, 0x62, 0x72,
+	0x6f, 0x6b, 0x65, 0x72, 0x2d, 0x73, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x2f, 0x76, 0x33, 0x2f,
+	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x3b, 0x73, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x70, 0x62, 0x62,
+	0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_broker_proto_rawDescOnce sync.Once
+	file_broker_proto_rawDescData = file_broker_proto_rawDesc
+)
+
+func file_broker_proto_rawDescGZIP() []byte {
+	file_broker_proto_rawDescOnce.Do(func() {
+		file_broker_proto_rawDescData = protoimpl.X.CompressGZIP(file_broker_proto_rawDescData)
+	})
+	return file_broker_proto_rawDescData
+}
+
+var file_broker_proto_msgTypes = make([]protoimpl.MessageInfo, 8)
+var file_broker_proto_goTypes = []interface{}{
+	(*PublishRequest)(nil),        // 0: servicepb.PublishRequest
+	(*BatchPublishRequest)(nil),   // 1: servicepb.BatchPublishRequest
+	(*PublishResponse)(nil),       // 2: servicepb.PublishResponse
+	(*BatchPublishResponse)(nil),  // 3: servicepb.BatchPublishResponse
+	(*SubscribeRequest)(nil),      // 4: servicepb.SubscribeRequest
+	(*BatchSubscribeRequest)(nil), // 5: servicepb.BatchSubscribeRequest
+	(*Message)(nil),               // 6: servicepb.Message
+	nil,                           // 7: servicepb.Message.HeaderEntry
+}
+var file_broker_proto_depIdxs = []int32{
+	6, // 0: servicepb.PublishRequest.message:type_name -> servicepb.Message
+	6, // 1: servicepb.BatchPublishRequest.message:type_name -> servicepb.Message
+	7, // 2: servicepb.Message.header:type_name -> servicepb.Message.HeaderEntry
+	0, // 3: servicepb.BrokerService.Publish:input_type -> servicepb.PublishRequest
+	1, // 4: servicepb.BrokerService.BatchPublish:input_type -> servicepb.BatchPublishRequest
+	4, // 5: servicepb.BrokerService.Subscribe:input_type -> servicepb.SubscribeRequest
+	5, // 6: servicepb.BrokerService.BatchSubscribe:input_type -> servicepb.BatchSubscribeRequest
+	2, // 7: servicepb.BrokerService.Publish:output_type -> servicepb.PublishResponse
+	3, // 8: servicepb.BrokerService.BatchPublish:output_type -> servicepb.BatchPublishResponse
+	6, // 9: servicepb.BrokerService.Subscribe:output_type -> servicepb.Message
+	6, // 10: servicepb.BrokerService.BatchSubscribe:output_type -> servicepb.Message
+	7, // [7:11] is the sub-list for method output_type
+	3, // [3:7] is the sub-list for method input_type
+	3, // [3:3] is the sub-list for extension type_name
+	3, // [3:3] is the sub-list for extension extendee
+	0, // [0:3] is the sub-list for field type_name
+}
+
+func init() { file_broker_proto_init() }
+func file_broker_proto_init() {
+	if File_broker_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_broker_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*PublishRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_broker_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*BatchPublishRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_broker_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*PublishResponse); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_broker_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*BatchPublishResponse); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_broker_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*SubscribeRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_broker_proto_msgTypes[5].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*BatchSubscribeRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_broker_proto_msgTypes[6].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Message); 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_broker_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   8,
+			NumExtensions: 0,
+			NumServices:   1,
+		},
+		GoTypes:           file_broker_proto_goTypes,
+		DependencyIndexes: file_broker_proto_depIdxs,
+		MessageInfos:      file_broker_proto_msgTypes,
+	}.Build()
+	File_broker_proto = out.File
+	file_broker_proto_rawDesc = nil
+	file_broker_proto_goTypes = nil
+	file_broker_proto_depIdxs = nil
+}

proto/broker.proto

@@ -0,0 +1,44 @@
+syntax = "proto3";
+
+package servicepb;
+option go_package="go.unistack.org/micro-broker-service/v3/proto;servicepb";
+
+service BrokerService {
+	rpc Publish(PublishRequest) returns (PublishResponse) {};
+	rpc BatchPublish(BatchPublishRequest) returns (BatchPublishResponse) {};
+	rpc Subscribe(SubscribeRequest) returns (stream Message) {};
+	rpc BatchSubscribe(BatchSubscribeRequest) returns (stream Message) {};
+};
+
+message PublishRequest {
+	string topic = 1;
+	Message message = 2;
+};
+
+message BatchPublishRequest {
+	string topic = 1;
+	repeated Message message = 2;
+};
+
+message PublishResponse {
+
+};
+
+message BatchPublishResponse {
+
+};
+
+message SubscribeRequest {
+	string topic = 1;
+	string group = 2;
+};
+
+message BatchSubscribeRequest {
+	string topic = 1;
+	string group = 2;
+};
+
+message Message {
+	map<string,string> header = 1;
+	bytes body = 2;
+};

proto/broker_grpc.pb.go

@@ -0,0 +1,264 @@
+// Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+
+package servicepb
+
+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
+
+// BrokerServiceClient is the client API for BrokerService 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 BrokerServiceClient interface {
+	Publish(ctx context.Context, in *PublishRequest, opts ...grpc.CallOption) (*PublishResponse, error)
+	BatchPublish(ctx context.Context, in *BatchPublishRequest, opts ...grpc.CallOption) (*BatchPublishResponse, error)
+	Subscribe(ctx context.Context, in *SubscribeRequest, opts ...grpc.CallOption) (BrokerService_SubscribeClient, error)
+	BatchSubscribe(ctx context.Context, in *BatchSubscribeRequest, opts ...grpc.CallOption) (BrokerService_BatchSubscribeClient, error)
+}
+
+type brokerServiceClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewBrokerServiceClient(cc grpc.ClientConnInterface) BrokerServiceClient {
+	return &brokerServiceClient{cc}
+}
+
+func (c *brokerServiceClient) Publish(ctx context.Context, in *PublishRequest, opts ...grpc.CallOption) (*PublishResponse, error) {
+	out := new(PublishResponse)
+	err := c.cc.Invoke(ctx, "/servicepb.BrokerService/Publish", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *brokerServiceClient) BatchPublish(ctx context.Context, in *BatchPublishRequest, opts ...grpc.CallOption) (*BatchPublishResponse, error) {
+	out := new(BatchPublishResponse)
+	err := c.cc.Invoke(ctx, "/servicepb.BrokerService/BatchPublish", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *brokerServiceClient) Subscribe(ctx context.Context, in *SubscribeRequest, opts ...grpc.CallOption) (BrokerService_SubscribeClient, error) {
+	stream, err := c.cc.NewStream(ctx, &BrokerService_ServiceDesc.Streams[0], "/servicepb.BrokerService/Subscribe", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &brokerServiceSubscribeClient{stream}
+	if err := x.ClientStream.SendMsg(in); err != nil {
+		return nil, err
+	}
+	if err := x.ClientStream.CloseSend(); err != nil {
+		return nil, err
+	}
+	return x, nil
+}
+
+type BrokerService_SubscribeClient interface {
+	Recv() (*Message, error)
+	grpc.ClientStream
+}
+
+type brokerServiceSubscribeClient struct {
+	grpc.ClientStream
+}
+
+func (x *brokerServiceSubscribeClient) Recv() (*Message, error) {
+	m := new(Message)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func (c *brokerServiceClient) BatchSubscribe(ctx context.Context, in *BatchSubscribeRequest, opts ...grpc.CallOption) (BrokerService_BatchSubscribeClient, error) {
+	stream, err := c.cc.NewStream(ctx, &BrokerService_ServiceDesc.Streams[1], "/servicepb.BrokerService/BatchSubscribe", opts...)
+	if err != nil {
+		return nil, err
+	}
+	x := &brokerServiceBatchSubscribeClient{stream}
+	if err := x.ClientStream.SendMsg(in); err != nil {
+		return nil, err
+	}
+	if err := x.ClientStream.CloseSend(); err != nil {
+		return nil, err
+	}
+	return x, nil
+}
+
+type BrokerService_BatchSubscribeClient interface {
+	Recv() (*Message, error)
+	grpc.ClientStream
+}
+
+type brokerServiceBatchSubscribeClient struct {
+	grpc.ClientStream
+}
+
+func (x *brokerServiceBatchSubscribeClient) Recv() (*Message, error) {
+	m := new(Message)
+	if err := x.ClientStream.RecvMsg(m); err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+// BrokerServiceServer is the server API for BrokerService service.
+// All implementations must embed UnimplementedBrokerServiceServer
+// for forward compatibility
+type BrokerServiceServer interface {
+	Publish(context.Context, *PublishRequest) (*PublishResponse, error)
+	BatchPublish(context.Context, *BatchPublishRequest) (*BatchPublishResponse, error)
+	Subscribe(*SubscribeRequest, BrokerService_SubscribeServer) error
+	BatchSubscribe(*BatchSubscribeRequest, BrokerService_BatchSubscribeServer) error
+	mustEmbedUnimplementedBrokerServiceServer()
+}
+
+// UnimplementedBrokerServiceServer must be embedded to have forward compatible implementations.
+type UnimplementedBrokerServiceServer struct {
+}
+
+func (UnimplementedBrokerServiceServer) Publish(context.Context, *PublishRequest) (*PublishResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method Publish not implemented")
+}
+func (UnimplementedBrokerServiceServer) BatchPublish(context.Context, *BatchPublishRequest) (*BatchPublishResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method BatchPublish not implemented")
+}
+func (UnimplementedBrokerServiceServer) Subscribe(*SubscribeRequest, BrokerService_SubscribeServer) error {
+	return status.Errorf(codes.Unimplemented, "method Subscribe not implemented")
+}
+func (UnimplementedBrokerServiceServer) BatchSubscribe(*BatchSubscribeRequest, BrokerService_BatchSubscribeServer) error {
+	return status.Errorf(codes.Unimplemented, "method BatchSubscribe not implemented")
+}
+func (UnimplementedBrokerServiceServer) mustEmbedUnimplementedBrokerServiceServer() {}
+
+// UnsafeBrokerServiceServer may be embedded to opt out of forward compatibility for this service.
+// Use of this interface is not recommended, as added methods to BrokerServiceServer will
+// result in compilation errors.
+type UnsafeBrokerServiceServer interface {
+	mustEmbedUnimplementedBrokerServiceServer()
+}
+
+func RegisterBrokerServiceServer(s grpc.ServiceRegistrar, srv BrokerServiceServer) {
+	s.RegisterService(&BrokerService_ServiceDesc, srv)
+}
+
+func _BrokerService_Publish_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(PublishRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(BrokerServiceServer).Publish(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/servicepb.BrokerService/Publish",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(BrokerServiceServer).Publish(ctx, req.(*PublishRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _BrokerService_BatchPublish_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(BatchPublishRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(BrokerServiceServer).BatchPublish(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/servicepb.BrokerService/BatchPublish",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(BrokerServiceServer).BatchPublish(ctx, req.(*BatchPublishRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _BrokerService_Subscribe_Handler(srv interface{}, stream grpc.ServerStream) error {
+	m := new(SubscribeRequest)
+	if err := stream.RecvMsg(m); err != nil {
+		return err
+	}
+	return srv.(BrokerServiceServer).Subscribe(m, &brokerServiceSubscribeServer{stream})
+}
+
+type BrokerService_SubscribeServer interface {
+	Send(*Message) error
+	grpc.ServerStream
+}
+
+type brokerServiceSubscribeServer struct {
+	grpc.ServerStream
+}
+
+func (x *brokerServiceSubscribeServer) Send(m *Message) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+func _BrokerService_BatchSubscribe_Handler(srv interface{}, stream grpc.ServerStream) error {
+	m := new(BatchSubscribeRequest)
+	if err := stream.RecvMsg(m); err != nil {
+		return err
+	}
+	return srv.(BrokerServiceServer).BatchSubscribe(m, &brokerServiceBatchSubscribeServer{stream})
+}
+
+type BrokerService_BatchSubscribeServer interface {
+	Send(*Message) error
+	grpc.ServerStream
+}
+
+type brokerServiceBatchSubscribeServer struct {
+	grpc.ServerStream
+}
+
+func (x *brokerServiceBatchSubscribeServer) Send(m *Message) error {
+	return x.ServerStream.SendMsg(m)
+}
+
+// BrokerService_ServiceDesc is the grpc.ServiceDesc for BrokerService service.
+// It's only intended for direct use with grpc.RegisterService,
+// and not to be introspected or modified (even as a copy)
+var BrokerService_ServiceDesc = grpc.ServiceDesc{
+	ServiceName: "servicepb.BrokerService",
+	HandlerType: (*BrokerServiceServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "Publish",
+			Handler:    _BrokerService_Publish_Handler,
+		},
+		{
+			MethodName: "BatchPublish",
+			Handler:    _BrokerService_BatchPublish_Handler,
+		},
+	},
+	Streams: []grpc.StreamDesc{
+		{
+			StreamName:    "Subscribe",
+			Handler:       _BrokerService_Subscribe_Handler,
+			ServerStreams: true,
+		},
+		{
+			StreamName:    "BatchSubscribe",
+			Handler:       _BrokerService_BatchSubscribe_Handler,
+			ServerStreams: true,
+		},
+	},
+	Metadata: "broker.proto",
+}

service.go

@@ -1,16 +1,201 @@
 // Package service provides the broker service client
-package service
+package service // import "go.unistack.org/micro-broker-service/v3"
 
 import (
-	"github.com/micro/go-micro/v2/broker"
-	"github.com/micro/go-micro/v2/broker/service"
-	"github.com/micro/go-micro/v2/cmd"
+	"context"
+	"fmt"
+	"time"
+
+	pbmicro "go.unistack.org/micro-broker-service/v3/micro"
+	pb "go.unistack.org/micro-broker-service/v3/proto"
+	"go.unistack.org/micro/v3/broker"
+	"go.unistack.org/micro/v3/client"
+	"go.unistack.org/micro/v3/logger"
+	"go.unistack.org/micro/v3/metadata"
 )
 
-func init() {
-	cmd.DefaultBrokers["service"] = NewBroker
+type serviceBroker struct {
+	addrs   []string
+	service string
+	client  pbmicro.BrokerServiceClient
+	init    bool
+	opts    broker.Options
+}
+
+func (b *serviceBroker) Address() string {
+	return b.addrs[0]
+}
+
+func (b *serviceBroker) Connect(ctx context.Context) error {
+	return nil
+}
+
+func (b *serviceBroker) Disconnect(ctx context.Context) error {
+	return nil
+}
+
+func (b *serviceBroker) Init(opts ...broker.Option) error {
+	if len(opts) == 0 && b.init {
+		return nil
+	}
+
+	for _, o := range opts {
+		o(&b.opts)
+	}
+
+	var cli client.Client
+	if b.opts.Context != nil {
+		if v, ok := b.opts.Context.Value(clientKey{}).(client.Client); ok && v != nil {
+			cli = v
+		}
+		if v, ok := b.opts.Context.Value(serviceKey{}).(string); ok && v != "" {
+			b.service = v
+		}
+	}
+
+	if err := b.opts.Register.Init(); err != nil {
+		return err
+	}
+	if err := b.opts.Tracer.Init(); err != nil {
+		return err
+	}
+	if err := b.opts.Logger.Init(); err != nil {
+		return err
+	}
+	if err := b.opts.Meter.Init(); err != nil {
+		return err
+	}
+
+	if b.service == "" {
+		return fmt.Errorf("missing Service option")
+	}
+
+	if cli == nil {
+		return fmt.Errorf("missing Client option")
+	}
+
+	b.client = pbmicro.NewBrokerServiceClient(b.service, cli)
+
+	b.init = true
+	return nil
+}
+
+func (b *serviceBroker) Options() broker.Options {
+	return b.opts
+}
+
+func (b *serviceBroker) BatchPublish(ctx context.Context, msgs []*broker.Message, opts ...broker.PublishOption) error {
+	return b.publish(ctx, msgs, opts...)
+}
+
+func (b *serviceBroker) Publish(ctx context.Context, topic string, msg *broker.Message, opts ...broker.PublishOption) error {
+	msg.Header.Set(metadata.HeaderTopic, topic)
+	return b.publish(ctx, []*broker.Message{msg}, opts...)
+}
+
+func (b *serviceBroker) publish(ctx context.Context, msgs []*broker.Message, opts ...broker.PublishOption) error {
+	for _, msg := range msgs {
+		topic, _ := msg.Header.Get(metadata.HeaderTopic)
+		if logger.V(logger.TraceLevel) {
+			logger.Tracef(ctx, "Publishing to topic %s broker %v", topic, b.addrs)
+		}
+		_, err := b.client.Publish(ctx, &pb.PublishRequest{
+			Topic: topic,
+			Message: &pb.Message{
+				Header: msg.Header,
+				Body:   msg.Body,
+			},
+		}, client.WithAddress(b.addrs...))
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (b *serviceBroker) BatchSubscribe(ctx context.Context, topic string, handler broker.BatchHandler, opts ...broker.SubscribeOption) (broker.Subscriber, error) {
+	return nil, nil
+}
+
+func (b *serviceBroker) Subscribe(ctx context.Context, topic string, handler broker.Handler, opts ...broker.SubscribeOption) (broker.Subscriber, error) {
+	options := broker.NewSubscribeOptions(opts...)
+	if logger.V(logger.TraceLevel) {
+		logger.Tracef(ctx, "Subscribing to topic %s group %s broker %v", topic, options.Group, b.addrs)
+	}
+	stream, err := b.client.Subscribe(ctx, &pb.SubscribeRequest{
+		Topic: topic,
+		Group: options.Group,
+	}, client.WithAddress(b.addrs...), client.WithRequestTimeout(time.Hour))
+	if err != nil {
+		return nil, err
+	}
+
+	sub := &serviceSub{
+		topic:   topic,
+		group:   options.Group,
+		handler: handler,
+		stream:  stream,
+		closed:  make(chan bool),
+		options: options,
+	}
+
+	go func() {
+		for {
+			select {
+			case <-sub.closed:
+				if logger.V(logger.TraceLevel) {
+					logger.Tracef(ctx, "Unsubscribed from topic %s", topic)
+				}
+				return
+			default:
+				if logger.V(logger.TraceLevel) {
+					// run the subscriber
+					logger.Tracef(ctx, "Streaming from broker %v to topic [%s] group [%s]", b.addrs, topic, options.Group)
+				}
+				if err := sub.run(ctx); err != nil {
+					if logger.V(logger.TraceLevel) {
+						logger.Tracef(ctx, "Resubscribing to topic %s broker %v", topic, b.addrs)
+					}
+					stream, err := b.client.Subscribe(ctx, &pb.SubscribeRequest{
+						Topic: topic,
+						Group: options.Group,
+					}, client.WithAddress(b.addrs...), client.WithRequestTimeout(time.Hour))
+					if err != nil {
+						if logger.V(logger.TraceLevel) {
+							logger.Tracef(ctx, "Failed to resubscribe to topic %s: %v", topic, err)
+						}
+						time.Sleep(time.Second)
+						continue
+					}
+					// new stream
+					sub.stream = stream
+				}
+			}
+		}
+	}()
+
+	return sub, nil
+}
+
+func (b *serviceBroker) String() string {
+	return "service"
+}
+
+func (b *serviceBroker) Name() string {
+	return b.opts.Name
 }
 
 func NewBroker(opts ...broker.Option) broker.Broker {
-	return service.NewBroker(opts...)
+	options := broker.NewOptions(opts...)
+
+	addrs := options.Addrs
+	if len(addrs) == 0 {
+		addrs = []string{"127.0.0.1:8001"}
+	}
+
+	return &serviceBroker{
+		addrs: addrs,
+		opts:  options,
+	}
 }

subscriber.go

@@ -0,0 +1,114 @@
+package service
+
+import (
+	"context"
+
+	pbmicro "go.unistack.org/micro-broker-service/v3/micro"
+	"go.unistack.org/micro/v3/broker"
+	"go.unistack.org/micro/v3/logger"
+)
+
+type serviceSub struct {
+	topic   string
+	group   string
+	handler broker.Handler
+	stream  pbmicro.BrokerService_SubscribeClient
+	closed  chan bool
+	options broker.SubscribeOptions
+}
+
+type serviceEvent struct {
+	topic   string
+	err     error
+	message *broker.Message
+}
+
+func (s *serviceEvent) Topic() string {
+	return s.topic
+}
+
+func (s *serviceEvent) Message() *broker.Message {
+	return s.message
+}
+
+func (s *serviceEvent) Ack() error {
+	return nil
+}
+
+func (s *serviceEvent) Error() error {
+	return s.err
+}
+
+func (s *serviceEvent) SetError(err error) {
+	s.err = err
+}
+
+func (s *serviceSub) isClosed() bool {
+	select {
+	case <-s.closed:
+		return true
+	default:
+		return false
+	}
+}
+
+func (s *serviceSub) run(ctx context.Context) error {
+	exit := make(chan bool)
+	go func() {
+		select {
+		case <-exit:
+		case <-s.closed:
+		}
+
+		// close the stream
+		s.stream.Close()
+	}()
+
+	for {
+		// TODO: do not fail silently
+		msg, err := s.stream.Recv()
+		if err != nil {
+			if logger.V(logger.TraceLevel) {
+				logger.Tracef(ctx, "Streaming error for subcription to topic %s: %v", s.Topic(), err)
+			}
+
+			// close the exit channel
+			close(exit)
+
+			// don't return an error if we unsubscribed
+			if s.isClosed() {
+				return nil
+			}
+
+			// return stream error
+			return err
+		}
+
+		p := &serviceEvent{
+			topic: s.topic,
+			message: &broker.Message{
+				Header: msg.Header,
+				Body:   msg.Body,
+			},
+		}
+		p.err = s.handler(p)
+	}
+}
+
+func (s *serviceSub) Options() broker.SubscribeOptions {
+	return s.options
+}
+
+func (s *serviceSub) Topic() string {
+	return s.topic
+}
+
+func (s *serviceSub) Unsubscribe(ctx context.Context) error {
+	select {
+	case <-s.closed:
+		return nil
+	default:
+		close(s.closed)
+	}
+	return nil
+}