update workflows

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

.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 +1,26 @@
+# 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"
+    commit-message:
+      prefix: "chore"
+      include: "scope"
+
+  # Maintain dependencies for Golang
+  - package-ecosystem: "gomod"
+    directory: "/"
+    schedule:
+      interval: "daily"
+    commit-message:
+      prefix: "chore"
+      include: "scope"
+

.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@v2
+        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@v2
+      with:
+        go-version: 1.16
+    - name: checkout
+      uses: actions/checkout@v3
+    - name: cache
+      uses: actions/cache@v2
+      with:
+        path: ~/go/pkg/mod
+        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+        restore-keys: ${{ runner.os }}-go-
+    - name: deps
+      run: go get -v -t -d ./...
+    - name: test
+      env:
+        INTEGRATION_TESTS: yes
+      run: go test -mod readonly -v ./...
+  lint:
+    name: lint
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v3
+      - name: lint
+        uses: golangci/golangci-lint-action@v3.1.0
+        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@v2
+      with:
+        go-version: 1.16
+    # Initializes the CodeQL tools for scanning.
+    - name: init
+      uses: github/codeql-action/init@v1
+      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@v1
+
+    # 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@v1

.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@v1.3.0
+        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@v2
+      with:
+        go-version: 1.16
+    - name: checkout
+      uses: actions/checkout@v3
+    - name: cache
+      uses: actions/cache@v2
+      with:
+        path: ~/go/pkg/mod
+        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+        restore-keys: ${{ runner.os }}-go-
+    - name: deps
+      run: go get -v -t -d ./...
+    - name: test
+      env:
+        INTEGRATION_TESTS: yes
+      run: go test -mod readonly -v ./...
+  lint:
+    name: lint
+    runs-on: ubuntu-latest
+    steps:
+      - name: checkout
+        uses: actions/checkout@v3
+      - name: lint
+        uses: golangci/golangci-lint-action@v3.1.0
+        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

go.mod

@@ -1,10 +1,10 @@
-module github.com/unistack-org/micro-broker-nats/v3
+module go.unistack.org/micro-broker-nats/v3
 
-go 1.15
+go 1.16
 
 require (
-	github.com/nats-io/nats-server/v2 v2.1.9 // indirect
-	github.com/nats-io/nats.go v1.10.0
-	github.com/unistack-org/micro/v3 v3.2.4
-	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
+	github.com/nats-io/nats-server/v2 v2.6.1 // indirect
+	github.com/nats-io/nats.go v1.13.0
+	go.unistack.org/micro/v3 v3.8.21
+	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c
 )

go.sum

@@ -1,113 +1,147 @@
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 golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
-golang.org/x/tools v0.0.0-20191216052735-49a3e744a425/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
-golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 h1:go1bK/D/BFZV2I8cIQd1NKEZ+0owSTG1fDTci4IqFcE=
 golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
@@ -115,10 +149,16 @@ google.golang.org/appengine v1.1.0/go.mod h1:EbEs0AVv82hx2wNQdGPgUI5lhzA/G0D9Ywl
 google.golang.org/appengine v1.4.0/go.mod h1:xpcJRLb0r/rnEns0DIKYYv+WjYCduHsrkT7/EB5XEv4=
 google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
 google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
+google.golang.org/genproto v0.0.0-20200513103714-09dca8ec2884/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
 google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
+google.golang.org/genproto v0.0.0-20220107163113-42d7afdf6368/go.mod h1:5CzLGKJ67TSI2B9POpiiyGha0AjJvZIUgRMt1dSmuhc=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.23.0/go.mod h1:Y5yQAOtifL1yxbo5wqy6BxZv8vAUGQwXBOALyacEbxg=
+google.golang.org/grpc v1.25.1/go.mod h1:c3i+UQWmh7LiEpx4sFZnkU36qjEYZ0imhYfXVyQciAY=
 google.golang.org/grpc v1.27.0/go.mod h1:qbnxyOmOxrQa7FizSgH+ReBfzJrCY1pSN7KXBS8abTk=
+google.golang.org/grpc v1.33.1/go.mod h1:fr5YgcSWrqhRRxogOsw7RzIpsmvOZ6IcH4kBYTpR3n0=
+google.golang.org/grpc v1.36.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
+google.golang.org/grpc v1.40.0/go.mod h1:ogyxbiOoUXAkP+4+xa6PZSE9DZgIHtSpzjDTB9KAK34=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
 google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
@@ -127,14 +167,17 @@ google.golang.org/protobuf v1.21.0/go.mod h1:47Nbq4nVaFHyn7ilMalzfO3qCViNmqZ2kzi
 google.golang.org/protobuf v1.22.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.23.0/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
 google.golang.org/protobuf v1.23.1-0.20200526195155-81db48ad09cc/go.mod h1:EGpADcykh3NcUnDUJcl1+ZksZNG86OlYog2l/sGQquU=
-google.golang.org/protobuf v1.25.0 h1:Ejskq+SyPohKW+1uil0JJMtmHCgJPJ/qWTxr8qp+R4c=
 google.golang.org/protobuf v1.25.0/go.mod h1:9JNX74DMeImyA3h4bdi1ymwjUzf21/xIlbajtzgsN7c=
+google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
+google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
+google.golang.org/protobuf v1.27.1 h1:SnqbnDw1V7RiZcXPx5MEeqPv2s79L9i7BJUlG/+RurQ=
+google.golang.org/protobuf v1.27.1/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f h1:BLraFXnmrev5lT+xlilqcH8XK9/i0At2xKjWk4p6zsU=
-gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v2 v2.3.0 h1:clyUAQHOM3G0M3f5vQj7LuJrETvjVot3Z5el9nffUtU=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
-gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.0-20200615113413-eeeca48fe776/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=

nats.go

@@ -1,5 +1,5 @@
 // Package nats provides a NATS broker
-package nats
+package nats // import "go.unistack.org/micro-broker-nats/v3"
 
 import (
 	"context"
@@ -9,21 +9,29 @@ import (
 	"sync"
 
 	nats "github.com/nats-io/nats.go"
-	"github.com/unistack-org/micro/v3/broker"
-	"github.com/unistack-org/micro/v3/logger"
+	"go.unistack.org/micro/v3/broker"
+	"go.unistack.org/micro/v3/logger"
+	"go.unistack.org/micro/v3/metadata"
+	"golang.org/x/sync/errgroup"
 )
 
+var pPool = sync.Pool{
+	New: func() interface{} {
+		return &publication{msg: broker.NewMessage("")}
+	},
+}
+
 type natsBroker struct {
 	sync.Once
 	sync.RWMutex
 
 	// indicate if we're connected
 	connected bool
-
-	addrs []string
-	conn  *nats.Conn
-	opts  broker.Options
-	nopts nats.Options
+	init      bool
+	addrs     []string
+	conn      *nats.Conn
+	opts      broker.Options
+	nopts     nats.Options
 
 	// should we drain the connection
 	drain   bool
@@ -31,17 +39,17 @@ type natsBroker struct {
 }
 
 type publication struct {
-	t   string
-	err error
-	m   *broker.Message
+	topic string
+	err   error
+	msg   *broker.Message
 }
 
 func (p *publication) Topic() string {
-	return p.t
+	return p.topic
 }
 
 func (p *publication) Message() *broker.Message {
-	return p.m
+	return p.msg
 }
 
 func (p *publication) Ack() error {
@@ -49,6 +57,10 @@ func (p *publication) Ack() error {
 	return nil
 }
 
+func (p *publication) SetError(err error) {
+	p.err = err
+}
+
 func (p *publication) Error() error {
 	return p.err
 }
@@ -75,11 +87,7 @@ func (n *natsBroker) Address() string {
 		return n.conn.ConnectedUrl()
 	}
 
-	if len(n.addrs) > 0 {
-		return n.addrs[0]
-	}
-
-	return ""
+	return strings.Join(n.addrs, ",")
 }
 
 func (n *natsBroker) setAddrs(addrs []string) []string {
@@ -101,13 +109,15 @@ func (n *natsBroker) setAddrs(addrs []string) []string {
 }
 
 func (n *natsBroker) Connect(ctx context.Context) error {
-	n.Lock()
-	defer n.Unlock()
-
+	n.RLock()
 	if n.connected {
+		n.RUnlock()
 		return nil
 	}
+	n.RUnlock()
 
+	n.Lock()
+	defer n.Unlock()
 	status := nats.CLOSED
 	if n.conn != nil {
 		status = n.conn.Status()
@@ -125,7 +135,7 @@ func (n *natsBroker) Connect(ctx context.Context) error {
 		c, err := opts.Connect()
 		if err != nil {
 			if n.opts.Logger.V(logger.WarnLevel) {
-				n.opts.Logger.Warnf(n.opts.Context, "Error connecting to broker: %v", err)
+				n.opts.Logger.Warnf(n.opts.Context, "error connecting to broker: %v", err)
 			}
 
 			return err
@@ -137,12 +147,20 @@ func (n *natsBroker) Connect(ctx context.Context) error {
 }
 
 func (n *natsBroker) Disconnect(ctx context.Context) error {
+	n.RLock()
+	if !n.connected {
+		n.RUnlock()
+		return nil
+	}
+	n.RUnlock()
+
 	n.Lock()
 	defer n.Unlock()
-
 	// drain the connection if specified
 	if n.drain {
-		n.conn.Drain()
+		if err := n.conn.Drain(); err != nil {
+			return err
+		}
 		n.closeCh <- nil
 	}
 
@@ -156,6 +174,23 @@ func (n *natsBroker) Disconnect(ctx context.Context) error {
 }
 
 func (n *natsBroker) Init(opts ...broker.Option) error {
+	if len(opts) == 0 && n.init {
+		return nil
+	}
+
+	if err := n.opts.Register.Init(); err != nil {
+		return err
+	}
+	if err := n.opts.Tracer.Init(); err != nil {
+		return err
+	}
+	if err := n.opts.Logger.Init(); err != nil {
+		return err
+	}
+	if err := n.opts.Meter.Init(); err != nil {
+		return err
+	}
+
 	n.setOption(opts...)
 	if n.opts.Codec == nil {
 		return fmt.Errorf("codec is nil")
@@ -167,19 +202,87 @@ func (n *natsBroker) Options() broker.Options {
 	return n.opts
 }
 
-func (n *natsBroker) Publish(ctx context.Context, topic string, msg *broker.Message, opts ...broker.PublishOption) error {
+func (n *natsBroker) BatchPublish(ctx context.Context, p []*broker.Message, opts ...broker.PublishOption) error {
+	var err error
+	msgs := make([]*nats.Msg, len(p))
+	var wg sync.WaitGroup
+
+	wg.Add(len(p))
+
+	options := broker.NewPublishOptions(opts...)
+
+	for _, m := range p {
+		rec := &nats.Msg{}
+		rec.Subject, _ = m.Header.Get(metadata.HeaderTopic)
+		if options.BodyOnly {
+			rec.Data = m.Body
+		} else if n.opts.Codec.String() == "noop" {
+			rec.Data = m.Body
+			rec.Header = make(nats.Header, len(m.Header))
+			for k, v := range m.Header {
+				rec.Header.Add(k, v)
+			}
+		} else {
+			rec.Data, err = n.opts.Codec.Marshal(m)
+			if err != nil {
+				return err
+			}
+		}
+		msgs = append(msgs, rec)
+	}
+
 	n.RLock()
 	defer n.RUnlock()
 
-	if n.conn == nil {
-		return errors.New("not connected")
+	g := errgroup.Group{}
+
+	for _, ms := range msgs {
+		m := ms
+		g.Go(func() error {
+			return n.conn.PublishMsg(m)
+		})
 	}
 
-	b, err := n.opts.Codec.Marshal(msg)
-	if err != nil {
-		return err
+	return g.Wait()
+}
+
+func (n *natsBroker) Publish(ctx context.Context, topic string, msg *broker.Message, opts ...broker.PublishOption) error {
+	var err error
+
+	n.RLock()
+	if n.conn == nil {
+		n.RUnlock()
+		return errors.New("not connected")
 	}
-	return n.conn.Publish(topic, b)
+	n.RUnlock()
+
+	options := broker.NewPublishOptions(opts...)
+
+	rec := &nats.Msg{}
+	rec.Subject, _ = msg.Header.Get(metadata.HeaderTopic)
+	if options.BodyOnly {
+		rec.Data = msg.Body
+	} else if n.opts.Codec.String() == "noop" {
+		rec.Data = msg.Body
+		rec.Header = make(nats.Header, len(msg.Header))
+		for k, v := range msg.Header {
+			rec.Header.Add(k, v)
+		}
+	} else {
+		rec.Data, err = n.opts.Codec.Marshal(msg)
+		if err != nil {
+			return err
+		}
+	}
+
+	n.RLock()
+	defer n.RUnlock()
+
+	return n.conn.PublishMsg(rec)
+}
+
+func (n *natsBroker) BatchSubscribe(ctx context.Context, topic string, handler broker.BatchHandler, opts ...broker.SubscribeOption) (broker.Subscriber, error) {
+	return nil, nil
 }
 
 func (n *natsBroker) Subscribe(ctx context.Context, topic string, handler broker.Handler, opts ...broker.SubscribeOption) (broker.Subscriber, error) {
@@ -190,29 +293,42 @@ func (n *natsBroker) Subscribe(ctx context.Context, topic string, handler broker
 	}
 	n.RUnlock()
 
-	opt := broker.NewSubscribeOptions(opts...)
+	options := broker.NewSubscribeOptions(opts...)
+
+	eh := n.opts.ErrorHandler
+	if options.ErrorHandler != nil {
+		eh = options.ErrorHandler
+	}
 
 	fn := func(msg *nats.Msg) {
-		m := &broker.Message{}
-		pub := &publication{t: msg.Subject}
+		pub := pPool.Get().(*publication)
+		pub.msg.Header = nil
+		pub.msg.Body = nil
+		pub.topic = msg.Subject
+		pub.err = nil
 
-		eh := n.opts.ErrorHandler
-		if opt.ErrorHandler != nil {
-			eh = opt.ErrorHandler
-		}
-		err := n.opts.Codec.Unmarshal(msg.Data, &m)
-		pub.err = err
-		pub.m = m
-		if err != nil {
-			pub.m.Body = msg.Data
-			if eh != nil {
-				eh(pub)
-			} else {
-				if n.opts.Logger.V(logger.ErrorLevel) {
-					n.opts.Logger.Error(n.opts.Context, err)
-				}
+		if options.BodyOnly {
+			pub.msg.Body = msg.Data
+		} else if n.opts.Codec.String() == "noop" {
+			pub.msg.Body = msg.Data
+			pub.msg.Header = metadata.New(len(msg.Header))
+			for k, v := range msg.Header {
+				pub.msg.Header.Set(k, strings.Join(v, ","))
+			}
+		} else {
+			err := n.opts.Codec.Unmarshal(msg.Data, pub.msg)
+			pub.err = err
+			if err != nil {
+				pub.msg.Body = msg.Data
+				if eh != nil {
+					eh(pub)
+				} else {
+					if n.opts.Logger.V(logger.ErrorLevel) {
+						n.opts.Logger.Error(n.opts.Context, err)
+					}
+				}
+				return
 			}
-			return
 		}
 		if err := handler(pub); err != nil {
 			pub.err = err
@@ -230,8 +346,8 @@ func (n *natsBroker) Subscribe(ctx context.Context, topic string, handler broker
 	var err error
 
 	n.RLock()
-	if len(opt.Group) > 0 {
-		sub, err = n.conn.QueueSubscribe(topic, opt.Group, fn)
+	if len(options.Group) > 0 {
+		sub, err = n.conn.QueueSubscribe(topic, options.Group, fn)
 	} else {
 		sub, err = n.conn.Subscribe(topic, fn)
 	}
@@ -239,7 +355,7 @@ func (n *natsBroker) Subscribe(ctx context.Context, topic string, handler broker
 	if err != nil {
 		return nil, err
 	}
-	return &subscriber{s: sub, opts: opt}, nil
+	return &subscriber{s: sub, opts: options}, nil
 }
 
 func (n *natsBroker) String() string {
@@ -300,9 +416,13 @@ func (n *natsBroker) onDisconnectedError(conn *nats.Conn, err error) {
 	n.closeCh <- err
 }
 
-func NewBroker(opts ...broker.Option) broker.Broker {
+func NewBroker(opts ...broker.Option) *natsBroker {
 	options := broker.NewOptions(opts...)
 
+	if options.Codec.String() != "noop" {
+		options.Logger.Infof(options.Context, "broker codec not noop, disable plain nats headers usage")
+	}
+
 	n := &natsBroker{
 		opts: options,
 	}

nats_test.go

@@ -5,7 +5,7 @@ import (
 	"testing"
 
 	nats "github.com/nats-io/nats.go"
-	"github.com/unistack-org/micro/v3/broker"
+	"go.unistack.org/micro/v3/broker"
 )
 
 var addrTestCases = []struct {

options.go

@@ -2,7 +2,7 @@ package nats
 
 import (
 	nats "github.com/nats-io/nats.go"
-	"github.com/unistack-org/micro/v3/broker"
+	"go.unistack.org/micro/v3/broker"
 )
 
 type optionsKey struct{}