update deps, minimise memory allocations

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

.gitea/ISSUE_TEMPLATE/question.md

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

.gitea/workflows/job_lint.yml

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

.gitea/workflows/job_test.yml

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

.gitea/workflows/job_tests.yml

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

.github/ISSUE_TEMPLATE/bug_report.md

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

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

@@ -1,6 +1,6 @@
 ---
 name: Feature request / Enhancement
-about: If you have a need not served by micro
+about: If you have a need not served by go-micro
 title: "[FEATURE]"
 labels: ''
 assignees: ''
@@ -14,4 +14,4 @@ A clear and concise description of what the problem is. Ex. I'm always frustrate
 A clear and concise description of what you want to happen.
 
 **Additional context**
-Add any other context or screenshots about the feature request here.
+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/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

.golangci.yml

@@ -1,5 +0,0 @@
-run:
-  concurrency: 8
-  deadline: 5m
-  issues-exit-code: 1
-  tests: true

go.mod

@@ -1,24 +1,25 @@
-module go.unistack.org/micro-meter-prometheus/v4
+module go.unistack.org/micro-meter-prometheus/v3
 
-go 1.22.0
+go 1.21
 
-toolchain go1.24.0
+toolchain go1.22.0
 
 require (
-	github.com/prometheus/client_golang v1.21.0
+	github.com/prometheus/client_golang v1.20.4
 	github.com/prometheus/client_model v0.6.1
-	github.com/prometheus/common v0.62.0
-	go.unistack.org/micro/v4 v4.1.2
+	github.com/prometheus/common v0.59.1
+	go.unistack.org/micro/v3 v3.10.91
 )
 
 require (
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/golang/protobuf v1.5.4 // indirect
-	github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
 	github.com/prometheus/procfs v0.15.1 // indirect
-	github.com/spf13/cast v1.7.1 // indirect
-	golang.org/x/sys v0.30.0 // indirect
-	google.golang.org/protobuf v1.36.5 // indirect
+	go.unistack.org/micro-proto/v3 v3.4.1 // indirect
+	golang.org/x/sys v0.25.0 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20230530153820-e85fd2cbaebc // indirect
+	google.golang.org/grpc v1.57.0 // indirect
+	google.golang.org/protobuf v1.34.2 // indirect
 )

go.sum

@@ -1,86 +1,46 @@
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
-github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
-github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
 github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/go-logfmt/logfmt v0.5.1/go.mod h1:WYhtIu8zTZfxdn5+rREduYbwxfcBr/Vr6KEVveWlfTs=
-github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/golang/protobuf v1.3.5/go.mod h1:6O5/vntMXwX2lRkT1hjjk0nAC1IDOTvTlVgjlRvqsdk=
-github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
-github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg=
-github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
 github.com/golang/protobuf v1.5.4 h1:i7eJL8qZTpSEXOPTxNKhASYpMn+8e5Q6AdndVa1dWek=
 github.com/golang/protobuf v1.5.4/go.mod h1:lnTiLA8Wa4RWRcIUkrtSVa5nRhsEGBg48fD6rSs7xps=
-github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
-github.com/jpillora/backoff v1.0.0/go.mod h1:J/6gKK9jxlEcS3zixgDgUAsiuZ7yrSoa/FX5e0EB2j4=
-github.com/json-iterator/go v1.1.12/go.mod h1:e30LSqwooZae/UwlEbR2852Gd8hjQvJoHmT4TnhNGBo=
-github.com/julienschmidt/httprouter v1.3.0/go.mod h1:JR6WtHb+2LUe8TCKY3cZOxFyyO8IZAc4RVcycCCAKdM=
-github.com/matttproud/golang_protobuf_extensions v1.0.4 h1:mmDVorXM7PCGKw94cs5zkfA9PSy5pEvNWRP0ET0TIVo=
-github.com/matttproud/golang_protobuf_extensions v1.0.4/go.mod h1:BSXmuO+STAnVfrANrmjBb36TMTDstsz7MSK+HVaYKv4=
-github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
-github.com/modern-go/reflect2 v1.0.2/go.mod h1:yWuevngMOJpCy52FWWMvUC8ws7m/LJsjYzDa0/r8luk=
+github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/klauspost/compress v1.17.9 h1:6KIumPrER1LHsvBVuDa0r5xaG0Es51mhhB9BQB2qeMA=
+github.com/klauspost/compress v1.17.9/go.mod h1:Di0epgTjJY877eYKx5yC51cX2A2Vl2ibi7bDH9ttBbw=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ=
-github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
-github.com/prometheus/client_golang v1.14.0 h1:nJdhIvne2eSX/XRAFV9PcvFFRbrjbcTUj0VP62TMhnw=
-github.com/prometheus/client_golang v1.14.0/go.mod h1:8vpkKitgIVNcqrRBWh1C4TIUQgYNtG/XQE4E/Zae36Y=
-github.com/prometheus/client_golang v1.16.0 h1:yk/hx9hDbrGHovbci4BY+pRMfSuuat626eFsHb7tmT8=
-github.com/prometheus/client_golang v1.16.0/go.mod h1:Zsulrv/L9oM40tJ7T815tM89lFEugiJ9HzIqaAx4LKc=
-github.com/prometheus/client_golang v1.19.0 h1:ygXvpU1AoN1MhdzckN+PyD9QJOSD4x7kmXYlnfbA6JU=
-github.com/prometheus/client_golang v1.19.0/go.mod h1:ZRM9uEAypZakd+q/x7+gmsvXdURP+DABIEIjnmDdp+k=
-github.com/prometheus/client_golang v1.21.0 h1:DIsaGmiaBkSangBgMtWdNfxbMNdku5IK6iNhrEqWvdA=
-github.com/prometheus/client_golang v1.21.0/go.mod h1:U9NM32ykUErtVBxdvD3zfi+EuFkkaBvMb09mIfe0Zgg=
-github.com/prometheus/client_model v0.3.0 h1:UBgGFHqYdG/TPFD1B1ogZywDqEkwp3fBMvqdiQ7Xew4=
-github.com/prometheus/client_model v0.3.0/go.mod h1:LDGWKZIo7rky3hgvBe+caln+Dr3dPggB5dvjtD7w9+w=
-github.com/prometheus/client_model v0.4.0 h1:5lQXD3cAg1OXBf4Wq03gTrXHeaV0TQvGfUooCfx1yqY=
-github.com/prometheus/client_model v0.4.0/go.mod h1:oMQmHW1/JoDwqLtg57MGgP/Fb1CJEYF2imWWhWtMkYU=
-github.com/prometheus/client_model v0.6.0 h1:k1v3CzpSRUTrKMppY35TLwPvxHqBu0bYgxZzqGIgaos=
-github.com/prometheus/client_model v0.6.0/go.mod h1:NTQHnmxFpouOD0DpvP4XujX3CdOAGQPoaGhyTchlyt8=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/prometheus/client_golang v1.20.4 h1:Tgh3Yr67PaOv/uTqloMsCEdeuFTatm5zIq5+qNN23vI=
+github.com/prometheus/client_golang v1.20.4/go.mod h1:PIEt8X02hGcP8JWbeHyeZ53Y/jReSnHgO035n//V5WE=
 github.com/prometheus/client_model v0.6.1 h1:ZKSh/rekM+n3CeS952MLRAdFwIKqeY8b62p8ais2e9E=
 github.com/prometheus/client_model v0.6.1/go.mod h1:OrxVMOVHjw3lKMa8+x6HeMGkHMQyHDk9E3jmP2AmGiY=
-github.com/prometheus/common v0.41.0 h1:npo01n6vUlRViIj5fgwiK8vlNIh8bnoxqh3gypKsyAw=
-github.com/prometheus/common v0.44.0 h1:+5BrQJwiBB9xsMygAB3TNvpQKOwlkc25LbISbrdOOfY=
-github.com/prometheus/common v0.44.0/go.mod h1:ofAIvZbQ1e/nugmZGz4/qCb9Ap1VoSTIO7x0VV9VvuY=
-github.com/prometheus/common v0.51.1 h1:eIjN50Bwglz6a/c3hAgSMcofL3nD+nFQkV6Dd4DsQCw=
-github.com/prometheus/common v0.51.1/go.mod h1:lrWtQx+iDfn2mbH5GUzlH9TSHyfZpHkSiG1W7y3sF2Q=
-github.com/prometheus/common v0.62.0 h1:xasJaQlnWAeyHdUBeGjXmutelfJHWMRr+Fg4QszZ2Io=
-github.com/prometheus/common v0.62.0/go.mod h1:vyBcEuLSvWos9B1+CyL7JZ2up+uFzXhkqml0W5zIY1I=
-github.com/prometheus/procfs v0.9.0 h1:wzCHvIvM5SxWqYvwgVL7yJY8Lz3PKn49KQtpgMYJfhI=
-github.com/prometheus/procfs v0.11.1 h1:xRC8Iq1yyca5ypa9n1EZnWZkt7dwcoRPQwX/5gwaUuI=
-github.com/prometheus/procfs v0.11.1/go.mod h1:eesXgaPo1q7lBpVMoMy0ZOFTth9hBn4W/y0/p/ScXhY=
-github.com/prometheus/procfs v0.13.0 h1:GqzLlQyfsPbaEHaQkO7tbDlriv/4o5Hudv6OXHGKX7o=
-github.com/prometheus/procfs v0.13.0/go.mod h1:cd4PFCR54QLnGKPaKGA6l+cfuNXtht43ZKY6tow0Y1g=
+github.com/prometheus/common v0.59.1 h1:LXb1quJHWm1P6wq/U824uxYi4Sg0oGvNeUm1z5dJoX0=
+github.com/prometheus/common v0.59.1/go.mod h1:GpWM7dewqmVYcd7SmRaiWVe9SSqjf0UrwnYnpEZNuT0=
 github.com/prometheus/procfs v0.15.1 h1:YagwOFzUgYfKKHX6Dr+sHT7km/hxC76UB0learggepc=
 github.com/prometheus/procfs v0.15.1/go.mod h1:fB45yRUv8NstnjriLhBQLuOUt+WW4BsoGhij/e3PBqk=
-github.com/spf13/cast v1.7.1 h1:cuNEagBQEHWN1FnbGEjCXL2szYEXqfJPbP2HNUaca9Y=
-github.com/spf13/cast v1.7.1/go.mod h1:ancEpBxwJDODSW/UG4rDrAqiKolqNNh2DX3mk86cAdo=
-go.unistack.org/micro/v4 v4.0.1 h1:xo1IxbVfgh8i0eY0VeYa3cbb13u5n/Mxnp3FOgWD4Jo=
-go.unistack.org/micro/v4 v4.0.1/go.mod h1:p/J5UcSJjfHsWGT31uKoghQ5rUQZzQJBAFy+Z4+ZVMs=
-go.unistack.org/micro/v4 v4.0.7 h1:2lwtZlHcSwgkahhFbkI4x1lOS79lw8uLHtcEhlFF+AM=
-go.unistack.org/micro/v4 v4.0.7/go.mod h1:bVEYTlPi0EsdgZZt311bIroDg9ict7ky3C87dSCCAGk=
-go.unistack.org/micro/v4 v4.0.19 h1:TrOJ+j0D1ZHwLEDUabei4ciLzJh/StDWiw4FQBCstY8=
-go.unistack.org/micro/v4 v4.0.19/go.mod h1:5+da5r835gP0WnNZbYUJDCvWpJ9Xc3IEGyp62e8o8R4=
-go.unistack.org/micro/v4 v4.1.2 h1:9SOlPYyPNNFpg1A7BsvhDyQm3gysLH1AhWbDCp1hyoY=
-go.unistack.org/micro/v4 v4.1.2/go.mod h1:lr3oYED8Ay1vjK68QqRw30QOtdk/ffpZqMFDasOUhKw=
-golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sys v0.9.0 h1:KS/R3tvhPqvJvwcKfnBHJwwthS11LRhmM5D59eEXa0s=
-golang.org/x/sys v0.11.0 h1:eG7RXZHdqOJ1i+0lgLgCpSXAp6M3LYlAo6osgSi0xOM=
-golang.org/x/sys v0.11.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.18.0 h1:DBdB3niSjOA/O0blCZBqDefyWNYveAYMNF1Wum0DYQ4=
-golang.org/x/sys v0.18.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/sys v0.30.0 h1:QjkSwP/36a20jFYWkSue1YwXzLmsV5Gfq7Eiy72C1uc=
-golang.org/x/sys v0.30.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-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 v1.30.0 h1:kPPoIgf3TsEvrm0PFe15JQ+570QVxYzEvvHqChK+cng=
-google.golang.org/protobuf v1.31.0 h1:g0LDEJHgrBl9N9r17Ru3sqWhkIx2NB67okBHPwC7hs8=
-google.golang.org/protobuf v1.31.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
-google.golang.org/protobuf v1.33.0 h1:uNO2rsAINq/JlFpSdYEKIZ0uKD/R9cpdv0T+yoGwGmI=
-google.golang.org/protobuf v1.33.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
-google.golang.org/protobuf v1.36.5 h1:tPhr+woSbjfYvY6/GPufUoYizxw1cF/yFoxJ2fmpwlM=
-google.golang.org/protobuf v1.36.5/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=
-gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+go.unistack.org/micro-proto/v3 v3.4.1 h1:UTjLSRz2YZuaHk9iSlVqqsA50JQNAEK2ZFboGqtEa9Q=
+go.unistack.org/micro-proto/v3 v3.4.1/go.mod h1:okx/cnOhzuCX0ggl/vToatbCupi0O44diiiLLsZ93Zo=
+go.unistack.org/micro/v3 v3.10.90 h1:EE7t4J14yjZC/lW6e0BfiBnU/xt/KqGkqSxumJhI/fI=
+go.unistack.org/micro/v3 v3.10.90/go.mod h1:erMgt3Bl7vQQ0e9UpQyR5NlLiZ9pKeEJ9+1tfYFaqUg=
+go.unistack.org/micro/v3 v3.10.91 h1:vuJY4tXwpqimwIkEJ3TozMYNVQQs+C5QMlQWPgSY/YM=
+go.unistack.org/micro/v3 v3.10.91/go.mod h1:erMgt3Bl7vQQ0e9UpQyR5NlLiZ9pKeEJ9+1tfYFaqUg=
+golang.org/x/net v0.28.0 h1:a9JDOJc5GMUJ0+UDqmLT86WiEy7iWyIhz8gz8E4e5hE=
+golang.org/x/net v0.28.0/go.mod h1:yqtgsTWOOnlGLG9GFRrK3++bGOUEkNBoHZc8MEDWPNg=
+golang.org/x/sys v0.25.0 h1:r+8e+loiHxRqhXVl6ML1nO3l1+oFoWbnlu2Ehimmi34=
+golang.org/x/sys v0.25.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/text v0.17.0 h1:XtiM5bkSOt+ewxlOE/aE/AKEHibwj/6gvWMl9Rsh0Qc=
+golang.org/x/text v0.17.0/go.mod h1:BuEKDfySbSR4drPmRPG/7iBdf8hvFMuRexcpahXilzY=
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+google.golang.org/grpc v1.57.0 h1:kfzNeI/klCGD2YPMUlaGNT3pxvYfga7smW3Vth8Zsiw=
+google.golang.org/grpc v1.57.0/go.mod h1:Sd+9RMTACXwmub0zcNY2c4arhtrbBYD1AUHI/dt16Mo=
+google.golang.org/protobuf v1.34.2 h1:6xV6lTsCfpGD21XK49h7MhtcApnLqkfYgPcdHftf6hg=
+google.golang.org/protobuf v1.34.2/go.mod h1:qYOHts0dSfpeUzUFpOMr/WGzszTmLH+DiWniOlNbLDw=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

prometheus.go

@@ -12,79 +12,54 @@ import (
 	"github.com/prometheus/client_golang/prometheus/collectors"
 	dto "github.com/prometheus/client_model/go"
 	"github.com/prometheus/common/expfmt"
-	"go.unistack.org/micro/v4/meter"
+	"go.unistack.org/micro/v3/meter"
 )
 
-var _ meter.Meter = &prometheusMeter{}
+var _ meter.Meter = (*prometheusMeter)(nil)
 
 type prometheusMeter struct {
 	opts         meter.Options
 	set          prometheus.Registerer
-	counter      map[string]*counters
-	floatCounter map[string]*floatCounters
-	gauge        map[string]*gauges
-	histogram    map[string]*histograms
-	summary      map[string]*summaries
+	counter      *sync.Map
+	floatCounter *sync.Map
+	gauge        *sync.Map
+	histogram    *sync.Map
+	summary      *sync.Map
 	sync.Mutex
 }
 
 type counters struct {
-	cs map[uint64]*prometheusCounter
+	cs *sync.Map
 }
 
 type gauges struct {
-	cs map[uint64]*prometheusGauge
+	cs *sync.Map
 }
 
 type histograms struct {
-	cs map[uint64]*prometheusHistogram
+	cs *sync.Map
 }
 
 type summaries struct {
-	cs map[uint64]*prometheusSummary
+	cs *sync.Map
 }
 
 type floatCounters struct {
-	cs map[uint64]*prometheusFloatCounter
-}
-
-/*
-func newFloat64(v float64) *float64 {
-	nv := v
-	return &nv
-}
-*/
-
-func newString(v string) *string {
-	nv := v
-	return &nv
+	cs *sync.Map
 }
 
 func NewMeter(opts ...meter.Option) *prometheusMeter {
 	return &prometheusMeter{
 		set:          prometheus.NewRegistry(), // prometheus.DefaultRegisterer,
 		opts:         meter.NewOptions(opts...),
-		counter:      make(map[string]*counters),
-		floatCounter: make(map[string]*floatCounters),
-		gauge:        make(map[string]*gauges),
-		histogram:    make(map[string]*histograms),
-		summary:      make(map[string]*summaries),
+		counter:      &sync.Map{},
+		floatCounter: &sync.Map{},
+		gauge:        &sync.Map{},
+		histogram:    &sync.Map{},
+		summary:      &sync.Map{},
 	}
 }
 
-func (m *prometheusMeter) buildMetric(name string, labels ...string) string {
-	nl := len(m.opts.Labels) + len(labels)
-	if nl == 0 {
-		return name
-	}
-
-	nlabels := make([]string, 0, nl)
-	nlabels = append(nlabels, m.opts.Labels...)
-	nlabels = append(nlabels, labels...)
-
-	return meter.BuildName(name, nlabels...)
-}
-
 func (m *prometheusMeter) Name() string {
 	return m.opts.Name
 }
@@ -92,146 +67,158 @@ func (m *prometheusMeter) Name() string {
 func (m *prometheusMeter) Counter(name string, labels ...string) meter.Counter {
 	m.Lock()
 	defer m.Unlock()
-	nm := m.buildMetric(name)
 	labels = append(m.opts.Labels, labels...)
-	cd, ok := m.counter[nm]
+	vcd, ok := m.counter.Load(name)
 	h := newHash(labels)
 	if !ok {
-		cd = &counters{cs: make(map[uint64]*prometheusCounter)}
-		c := &prometheusCounter{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: nm}), labels: labels}
-		cd.cs[h] = c
-		m.counter[nm] = cd
+		cd := &counters{cs: &sync.Map{}}
+		c := &prometheusCounter{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: name}), labels: labels}
+		cd.cs.Store(h, c)
+		m.counter.Store(name, cd)
 		return c
 	}
-	c, ok := cd.cs[h]
+	cd := vcd.(*counters)
+	vc, ok := cd.cs.Load(h)
 	if !ok {
-		c = &prometheusCounter{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: nm}), labels: labels}
-		cd.cs[h] = c
-		m.counter[nm] = cd
+		c := &prometheusCounter{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: name}), labels: labels}
+		cd.cs.Store(h, c)
+		m.counter.Store(name, cd)
+		return c
 	}
+	c := vc.(*prometheusCounter)
 	return c
 }
 
 func (m *prometheusMeter) FloatCounter(name string, labels ...string) meter.FloatCounter {
 	m.Lock()
 	defer m.Unlock()
-	nm := m.buildMetric(name)
 	labels = append(m.opts.Labels, labels...)
-	cd, ok := m.floatCounter[nm]
+	vcd, ok := m.floatCounter.Load(name)
 	h := newHash(labels)
 	if !ok {
-		cd = &floatCounters{cs: make(map[uint64]*prometheusFloatCounter)}
-		c := &prometheusFloatCounter{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: nm}), labels: labels}
-		cd.cs[h] = c
-		m.floatCounter[nm] = cd
+		cd := &floatCounters{cs: &sync.Map{}}
+		c := &prometheusFloatCounter{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: name}), labels: labels}
+		cd.cs.Store(h, c)
+		m.floatCounter.Store(name, cd)
 		return c
 	}
-	c, ok := cd.cs[h]
+	cd := vcd.(*floatCounters)
+	vc, ok := cd.cs.Load(h)
 	if !ok {
-		c = &prometheusFloatCounter{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: nm}), labels: labels}
-		cd.cs[h] = c
-		m.floatCounter[nm] = cd
+		c := &prometheusFloatCounter{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: name}), labels: labels}
+		cd.cs.Store(h, c)
+		m.floatCounter.Store(name, cd)
+		return c
 	}
+	c := vc.(*prometheusFloatCounter)
 	return c
 }
 
 func (m *prometheusMeter) Gauge(name string, fn func() float64, labels ...string) meter.Gauge {
 	m.Lock()
 	defer m.Unlock()
-	nm := m.buildMetric(name)
 	labels = append(m.opts.Labels, labels...)
-	cd, ok := m.gauge[nm]
+	vcd, ok := m.gauge.Load(name)
 	h := newHash(labels)
 	if !ok {
-		cd = &gauges{cs: make(map[uint64]*prometheusGauge)}
-		c := &prometheusGauge{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: nm}), labels: labels}
-		cd.cs[h] = c
-		m.gauge[nm] = cd
+		cd := &gauges{cs: &sync.Map{}}
+		c := &prometheusGauge{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: name}), labels: labels}
+		cd.cs.Store(h, c)
+		m.gauge.Store(name, cd)
 		return c
 	}
-	c, ok := cd.cs[h]
+	cd := vcd.(*gauges)
+	vc, ok := cd.cs.Load(h)
 	if !ok {
-		c = &prometheusGauge{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: nm}), labels: labels}
-		cd.cs[h] = c
-		m.gauge[nm] = cd
+		c := &prometheusGauge{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: name}), labels: labels}
+		cd.cs.Store(h, c)
+		m.gauge.Store(name, cd)
+		return c
 	}
+	c := vc.(*prometheusGauge)
 	return c
 }
 
 func (m *prometheusMeter) Histogram(name string, labels ...string) meter.Histogram {
 	m.Lock()
 	defer m.Unlock()
-	nm := m.buildMetric(name)
 	labels = append(m.opts.Labels, labels...)
-	cd, ok := m.histogram[nm]
+	vcd, ok := m.histogram.Load(name)
 	h := newHash(labels)
 	if !ok {
-		cd = &histograms{cs: make(map[uint64]*prometheusHistogram)}
-		c := &prometheusHistogram{c: prometheus.NewHistogram(prometheus.HistogramOpts{Name: nm}), labels: labels}
-		cd.cs[h] = c
-		m.histogram[nm] = cd
+		cd := &histograms{cs: &sync.Map{}}
+		c := &prometheusHistogram{c: prometheus.NewHistogram(prometheus.HistogramOpts{Name: name}), labels: labels}
+		cd.cs.Store(h, c)
+		m.histogram.Store(name, cd)
 		return c
 	}
-	c, ok := cd.cs[h]
+	cd := vcd.(*histograms)
+	vc, ok := cd.cs.Load(h)
 	if !ok {
-		c = &prometheusHistogram{c: prometheus.NewHistogram(prometheus.HistogramOpts{Name: nm}), labels: labels}
-		cd.cs[h] = c
-		m.histogram[nm] = cd
+		c := &prometheusHistogram{c: prometheus.NewHistogram(prometheus.HistogramOpts{Name: name}), labels: labels}
+		cd.cs.Store(h, c)
+		m.histogram.Store(name, cd)
+		return c
 	}
+	c := vc.(*prometheusHistogram)
 	return c
 }
 
 func (m *prometheusMeter) Summary(name string, labels ...string) meter.Summary {
 	m.Lock()
 	defer m.Unlock()
-	nm := m.buildMetric(name)
 	labels = append(m.opts.Labels, labels...)
-	cd, ok := m.summary[nm]
+	vcd, ok := m.summary.Load(name)
 	h := newHash(labels)
 	if !ok {
-		cd = &summaries{cs: make(map[uint64]*prometheusSummary)}
-		c := &prometheusSummary{c: prometheus.NewSummary(prometheus.SummaryOpts{Name: nm}), labels: labels}
-		cd.cs[h] = c
-		m.summary[nm] = cd
+		cd := &summaries{cs: &sync.Map{}}
+		c := &prometheusSummary{c: prometheus.NewSummary(prometheus.SummaryOpts{Name: name}), labels: labels}
+		cd.cs.Store(h, c)
+		m.summary.Store(name, cd)
 		return c
 	}
-	c, ok := cd.cs[h]
+	cd := vcd.(*summaries)
+	vc, ok := cd.cs.Load(h)
 	if !ok {
-		c = &prometheusSummary{c: prometheus.NewSummary(prometheus.SummaryOpts{Name: nm}), labels: labels}
-		cd.cs[h] = c
-		m.summary[nm] = cd
+		c := &prometheusSummary{c: prometheus.NewSummary(prometheus.SummaryOpts{Name: name}), labels: labels}
+		cd.cs.Store(h, c)
+		m.summary.Store(name, cd)
+		return c
 	}
+	c := vc.(*prometheusSummary)
 	return c
 }
 
 func (m *prometheusMeter) SummaryExt(name string, window time.Duration, quantiles []float64, labels ...string) meter.Summary {
 	m.Lock()
 	defer m.Unlock()
-	nm := m.buildMetric(name)
 	labels = append(m.opts.Labels, labels...)
-	cd, ok := m.summary[nm]
+	vcd, ok := m.summary.Load(name)
 	h := newHash(labels)
 	if !ok {
-		cd = &summaries{cs: make(map[uint64]*prometheusSummary)}
+		cd := &summaries{cs: &sync.Map{}}
 		c := &prometheusSummary{c: prometheus.NewSummary(prometheus.SummaryOpts{
-			Name:       nm,
+			Name:       name,
 			MaxAge:     window,
 			Objectives: map[float64]float64{0.5: 0.05, 0.9: 0.01, 0.99: 0.001},
 		}), labels: labels}
-		cd.cs[h] = c
-		m.summary[nm] = cd
+		cd.cs.Store(h, c)
+		m.summary.Store(name, cd)
 		return c
 	}
-	c, ok := cd.cs[h]
+	cd := vcd.(*summaries)
+	vc, ok := cd.cs.Load(h)
 	if !ok {
-		c = &prometheusSummary{c: prometheus.NewSummary(prometheus.SummaryOpts{
-			Name:       nm,
+		c := &prometheusSummary{c: prometheus.NewSummary(prometheus.SummaryOpts{
+			Name:       name,
 			MaxAge:     window,
 			Objectives: map[float64]float64{0.5: 0.05, 0.9: 0.01, 0.99: 0.001},
 		}), labels: labels}
-		cd.cs[h] = c
-		m.summary[nm] = cd
+		cd.cs.Store(h, c)
+		m.summary.Store(name, cd)
+		return c
 	}
+	c := vc.(*prometheusSummary)
 	return c
 }
 
@@ -239,6 +226,14 @@ func (m *prometheusMeter) Init(opts ...meter.Option) error {
 	for _, o := range opts {
 		o(&m.opts)
 	}
+
+	if m.opts.WriteProcessMetrics || m.opts.WriteFDMetrics {
+		pc := collectors.NewProcessCollector(collectors.ProcessCollectorOpts{})
+		_ = m.set.Register(pc)
+		gc := collectors.NewGoCollector(collectors.WithGoCollectorRuntimeMetrics(collectors.GoRuntimeMetricsRule{Matcher: regexp.MustCompile("/.*")}))
+		_ = m.set.Register(gc)
+	}
+
 	return nil
 }
 
@@ -248,13 +243,6 @@ func (m *prometheusMeter) Write(w io.Writer, opts ...meter.Option) error {
 		o(&options)
 	}
 
-	if options.WriteProcessMetrics || options.WriteFDMetrics {
-		pc := collectors.NewProcessCollector(collectors.ProcessCollectorOpts{})
-		_ = m.set.Register(pc)
-		gc := collectors.NewGoCollector(collectors.WithGoCollectorRuntimeMetrics(collectors.GoRuntimeMetricsRule{Matcher: regexp.MustCompile("/.*")}))
-		_ = m.set.Register(gc)
-	}
-
 	g, ok := m.set.(prometheus.Gatherer)
 	if !ok {
 		return fmt.Errorf("set type %T not prometheus.Gatherer", m.set)
@@ -267,80 +255,95 @@ func (m *prometheusMeter) Write(w io.Writer, opts ...meter.Option) error {
 
 	enc := expfmt.NewEncoder(w, expfmt.NewFormat(expfmt.TypeTextPlain))
 
-	for name, metrics := range m.counter {
+	m.counter.Range(func(k, v any) bool {
+		name := k.(string)
 		mf := &dto.MetricFamily{
-			Name:   newString(name),
-			Type:   dto.MetricType_GAUGE.Enum(),
-			Metric: make([]*dto.Metric, 0, len(metrics.cs)),
+			Name: &name,
+			Type: dto.MetricType_GAUGE.Enum(),
 		}
-		for _, c := range metrics.cs {
+		v.(*counters).cs.Range(func(_, nv any) bool {
+			c := nv.(*prometheusCounter)
 			m := &dto.Metric{}
 			_ = c.c.Write(m)
 			fillMetric(m, c.labels)
 			mf.Metric = append(mf.Metric, m)
-		}
+			return true
+		})
 		mfs = append(mfs, mf)
-	}
+		return true
+	})
 
-	for name, metrics := range m.gauge {
+	m.gauge.Range(func(k, v any) bool {
+		name := k.(string)
 		mf := &dto.MetricFamily{
-			Name:   newString(name),
-			Type:   dto.MetricType_GAUGE.Enum(),
-			Metric: make([]*dto.Metric, 0, len(metrics.cs)),
+			Name: &name,
+			Type: dto.MetricType_GAUGE.Enum(),
 		}
-		for _, c := range metrics.cs {
+		v.(*gauges).cs.Range(func(_, nv any) bool {
+			c := nv.(*prometheusGauge)
 			m := &dto.Metric{}
 			_ = c.c.Write(m)
 			fillMetric(m, c.labels)
 			mf.Metric = append(mf.Metric, m)
-		}
+			return true
+		})
 		mfs = append(mfs, mf)
-	}
+		return true
+	})
 
-	for name, metrics := range m.floatCounter {
+	m.floatCounter.Range(func(k, v any) bool {
+		name := k.(string)
 		mf := &dto.MetricFamily{
-			Name:   newString(name),
-			Type:   dto.MetricType_GAUGE.Enum(),
-			Metric: make([]*dto.Metric, 0, len(metrics.cs)),
+			Name: &name,
+			Type: dto.MetricType_GAUGE.Enum(),
 		}
-		for _, c := range metrics.cs {
+		v.(*floatCounters).cs.Range(func(_, nv any) bool {
+			c := nv.(*prometheusFloatCounter)
 			m := &dto.Metric{}
 			_ = c.c.Write(m)
 			fillMetric(m, c.labels)
 			mf.Metric = append(mf.Metric, m)
-		}
+			return true
+		})
 		mfs = append(mfs, mf)
-	}
+		return true
+	})
 
-	for name, metrics := range m.histogram {
+	m.histogram.Range(func(k, v any) bool {
+		name := k.(string)
 		mf := &dto.MetricFamily{
-			Name:   newString(name),
-			Type:   dto.MetricType_HISTOGRAM.Enum(),
-			Metric: make([]*dto.Metric, 0, len(metrics.cs)),
+			Name: &name,
+			Type: dto.MetricType_HISTOGRAM.Enum(),
 		}
-		for _, c := range metrics.cs {
+		v.(*histograms).cs.Range(func(_, nv any) bool {
+			c := nv.(*prometheusHistogram)
 			m := &dto.Metric{}
 			_ = c.c.Write(m)
 			fillMetric(m, c.labels)
 			mf.Metric = append(mf.Metric, m)
-		}
+			return true
+		})
 		mfs = append(mfs, mf)
-	}
+		return true
+	})
 
-	for name, metrics := range m.summary {
+	m.summary.Range(func(k, v any) bool {
+		name := k.(string)
 		mf := &dto.MetricFamily{
-			Name:   newString(name),
-			Type:   dto.MetricType_SUMMARY.Enum(),
-			Metric: make([]*dto.Metric, 0, len(metrics.cs)),
+			Name: &name,
+			Type: dto.MetricType_SUMMARY.Enum(),
 		}
-		for _, c := range metrics.cs {
+		v.(*summaries).cs.Range(func(_, nv any) bool {
+			c := nv.(*prometheusSummary)
 			m := &dto.Metric{}
 			_ = c.c.Write(m)
 			fillMetric(m, c.labels)
 			mf.Metric = append(mf.Metric, m)
-		}
+			return true
+		})
 		mfs = append(mfs, mf)
-	}
+		return true
+	})
 
 	for _, mf := range mfs {
 		_ = enc.Encode(mf)
@@ -484,6 +487,7 @@ func (c prometheusSummary) UpdateDuration(n time.Time) {
 }
 
 func newHash(labels []string) uint64 {
+	labels = meter.BuildLabels(labels...)
 	h := fnv.New64a()
 	for _, l := range labels {
 		h.Write([]byte(l))
@@ -492,12 +496,18 @@ func newHash(labels []string) uint64 {
 }
 
 func fillMetric(m *dto.Metric, labels []string) *dto.Metric {
+	var ok bool
+	seen := make(map[string]bool, len(labels)/2)
 	m.Label = make([]*dto.LabelPair, 0, len(labels)/2)
 	for idx := 0; idx < len(labels); idx += 2 {
+		if _, ok = seen[labels[idx]]; ok {
+			continue
+		}
 		m.Label = append(m.Label, &dto.LabelPair{
-			Name:  newString(labels[idx]),
-			Value: newString(labels[idx+1]),
+			Name:  &(labels[idx]),
+			Value: &(labels[idx+1]),
 		})
+		seen[labels[idx]] = true
 	}
 	return m
 }

prometheus_test.go

@@ -2,9 +2,12 @@ package prometheus
 
 import (
 	"bytes"
+	"context"
 	"testing"
 
-	"go.unistack.org/micro/v4/meter"
+	"go.unistack.org/micro/v3/client"
+	"go.unistack.org/micro/v3/codec"
+	"go.unistack.org/micro/v3/meter"
 )
 
 func TestStd(t *testing.T) {
@@ -19,16 +22,24 @@ func TestStd(t *testing.T) {
 	}
 }
 
-func TestBuildName(t *testing.T) {
-	m := NewMeter()
-	check := `micro_foo{aaa="b",bar="baz",ccc="d"}`
-	name := m.buildMetric("micro_foo", "bar", "baz", "aaa", "b", "ccc", "d")
-	if name != check {
-		t.Fatalf("metric name error: %s != %s", name, check)
-	}
+func TestWrapper(t *testing.T) {
+	m := NewMeter() // meter.Labels("test_key", "test_val"))
 
-	cnt := m.Counter("counter", "key", "val")
-	cnt.Inc()
+	ctx := context.Background()
+
+	c := client.NewClient(client.Meter(m))
+	if err := c.Init(); err != nil {
+		t.Fatal(err)
+	}
+	rsp := &codec.Frame{}
+	req := &codec.Frame{}
+	err := c.Call(ctx, c.NewRequest("svc2", "Service.Method", req), rsp)
+	_, _ = rsp, err
+	buf := bytes.NewBuffer(nil)
+	_ = m.Write(buf, meter.WriteProcessMetrics(false), meter.WriteFDMetrics(false))
+	if !bytes.Contains(buf.Bytes(), []byte(`micro_client_request_inflight{endpoint="Service.Method"} 0`)) {
+		t.Fatalf("invalid metrics output: %s", buf.Bytes())
+	}
 }
 
 func TestMultiple(t *testing.T) {