reuse sync.Map

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

.gitea/workflows/job_lint.yml

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

.gitea/workflows/job_test.yml

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

.gitea/workflows/job_tests.yml

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

.github/dependabot.yml

@@ -1,19 +0,0 @@
-# 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

@@ -1,20 +0,0 @@
-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

@@ -1,21 +0,0 @@
-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

@@ -1,47 +0,0 @@
-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

@@ -1,78 +0,0 @@
-# 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

@@ -1,27 +0,0 @@
-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

@@ -1,47 +0,0 @@
-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

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

counter.go

@@ -0,0 +1,93 @@
+package prometheus
+
+import (
+	"math"
+	"sync/atomic"
+	"unsafe"
+
+	dto "github.com/prometheus/client_model/go"
+)
+
+type prometheusCounter struct {
+	name string
+	c    *dto.Metric
+	n    float64
+}
+
+func (c *prometheusCounter) Add(n int) {
+	addFloat64(&(c.n), float64(n))
+}
+
+func (c *prometheusCounter) Dec() {
+	addFloat64(&(c.n), float64(-1))
+}
+
+func (c *prometheusCounter) Inc() {
+	addFloat64(&(c.n), float64(1))
+}
+
+func (c *prometheusCounter) Get() uint64 {
+	return uint64(getFloat64(&(c.n)))
+}
+
+func (c *prometheusCounter) Set(n uint64) {
+	setFloat64(&(c.n), math.Float64frombits(n))
+}
+
+type prometheusFloatCounter struct {
+	name string
+	c    *dto.Metric
+	n    float64
+}
+
+func (c *prometheusFloatCounter) Add(n float64) {
+	addFloat64(&(c.n), n)
+}
+
+func (c *prometheusFloatCounter) Dec() {
+	addFloat64(&(c.n), float64(-1))
+}
+
+func (c *prometheusFloatCounter) Inc() {
+	addFloat64(&(c.n), float64(1))
+}
+
+func (c *prometheusFloatCounter) Get() float64 {
+	return getFloat64(&(c.n))
+}
+
+func (c *prometheusFloatCounter) Set(n float64) {
+	setFloat64(&(c.n), n)
+}
+
+func (c *prometheusFloatCounter) Sub(n float64) {
+	addFloat64(&(c.n), -n)
+}
+
+func setFloat64(_addr *float64, value float64) float64 {
+	addr := (*uint64)(unsafe.Pointer(_addr))
+	for {
+		x := atomic.LoadUint64(addr)
+		if atomic.CompareAndSwapUint64(addr, x, math.Float64bits(value)) {
+			return value
+		}
+	}
+}
+
+func addFloat64(_addr *float64, delta float64) float64 {
+	addr := (*uint64)(unsafe.Pointer(_addr))
+	for {
+		x := atomic.LoadUint64(addr)
+		y := math.Float64frombits(x) + delta
+		if atomic.CompareAndSwapUint64(addr, x, math.Float64bits(y)) {
+			return y
+		}
+	}
+}
+
+func getFloat64(_addr *float64) float64 {
+	addr := (*uint64)(unsafe.Pointer(_addr))
+	x := atomic.LoadUint64(addr)
+	y := math.Float64frombits(x)
+	return y
+}

gauge.go

@@ -0,0 +1,13 @@
+package prometheus
+
+import dto "github.com/prometheus/client_model/go"
+
+type prometheusGauge struct {
+	name string
+	c    *dto.Metric
+	n    float64
+}
+
+func (c *prometheusGauge) Get() float64 {
+	return getFloat64(&(c.n))
+}

go.mod

@@ -1,25 +1,27 @@
 module go.unistack.org/micro-meter-prometheus/v3
 
-go 1.21
+go 1.22.0
-
-toolchain go1.22.0
 
 require (
 	github.com/prometheus/client_golang v1.20.4
 	github.com/prometheus/client_model v0.6.1
 	github.com/prometheus/common v0.59.1
 	go.unistack.org/micro/v3 v3.10.91
+	google.golang.org/protobuf v1.35.2
 )
 
 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/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
+	github.com/klauspost/compress v1.17.11 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
+	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
 	github.com/prometheus/procfs v0.15.1 // indirect
+	github.com/stretchr/testify v1.10.0 // indirect
 	go.unistack.org/micro-proto/v3 v3.4.1 // indirect
-	golang.org/x/sys v0.25.0 // indirect
+	golang.org/x/net v0.32.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20230530153820-e85fd2cbaebc // indirect
+	golang.org/x/sys v0.28.0 // indirect
-	google.golang.org/grpc v1.57.0 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20241209162323-e6fa225c2576 // indirect
-	google.golang.org/protobuf v1.34.2 // indirect
+	google.golang.org/grpc v1.68.1 // indirect
 )

go.sum

@@ -2,18 +2,15 @@ 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 v2.3.0 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 v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1VwoXQT9A3Wy9MM3WgvqSxFWenqJduM=
-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/golang/protobuf v1.5.4 h1:i7eJL8qZTpSEXOPTxNKhASYpMn+8e5Q6AdndVa1dWek=
 github.com/golang/protobuf v1.5.4/go.mod h1:lnTiLA8Wa4RWRcIUkrtSVa5nRhsEGBg48fD6rSs7xps=
 github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
 github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
-github.com/klauspost/compress v1.17.9 h1:6KIumPrER1LHsvBVuDa0r5xaG0Es51mhhB9BQB2qeMA=
+github.com/klauspost/compress v1.17.11 h1:In6xLpyWOi1+C7tXUUWv2ot1QvBjxevKAaI6IXrJmUc=
-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/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 h1:Jamvg5psRIccs7FGNTlIRMkT8wgtp5eCXdBlqhYGL6U=
-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=
@@ -22,25 +19,16 @@ github.com/prometheus/common v0.59.1 h1:LXb1quJHWm1P6wq/U824uxYi4Sg0oGvNeUm1z5dJ
 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/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
-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 v0.32.0 h1:ZqPmj8Kzc+Y6e0+skZsuACbx+wzMgo5MQsJh9Qd6aYI=
-golang.org/x/net v0.28.0/go.mod h1:yqtgsTWOOnlGLG9GFRrK3++bGOUEkNBoHZc8MEDWPNg=
+golang.org/x/sys v0.28.0 h1:Fksou7UEQUWlKvIdsqzJmUmCX3cZuD2+P3XyyzwMhlA=
-golang.org/x/sys v0.25.0 h1:r+8e+loiHxRqhXVl6ML1nO3l1+oFoWbnlu2Ehimmi34=
+golang.org/x/text v0.21.0 h1:zyQAAkrwaneQ066sspRyJaG9VNi/YJ1NfzcGB3hZ/qo=
-golang.org/x/sys v0.25.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20241209162323-e6fa225c2576 h1:8ZmaLZE4XWrtU3MyClkYqqtl6Oegr3235h7jxsDyqCY=
-golang.org/x/text v0.17.0 h1:XtiM5bkSOt+ewxlOE/aE/AKEHibwj/6gvWMl9Rsh0Qc=
+google.golang.org/grpc v1.68.1 h1:oI5oTa11+ng8r8XMMN7jAOmWfPZWbYpCFaMUTACxkM0=
-golang.org/x/text v0.17.0/go.mod h1:BuEKDfySbSR4drPmRPG/7iBdf8hvFMuRexcpahXilzY=
+google.golang.org/protobuf v1.35.2 h1:8Ar7bF+apOIoThw1EdZl0p1oWvMqTHmpA2fRTyZO8io=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20230530153820-e85fd2cbaebc h1:XSJ8Vk1SWuNr8S18z1NZSziL0CPIXLCCMDOEFtHBOFc=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20230530153820-e85fd2cbaebc/go.mod h1:66JfowdXAEgad5O9NnYcsNPLCPZJD++2L9X0PCMODrA=
-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=

histogram.go

@@ -0,0 +1,39 @@
+package prometheus
+
+import (
+	"sync/atomic"
+	"time"
+
+	dto "github.com/prometheus/client_model/go"
+)
+
+type prometheusHistogram struct {
+	name string
+	c    *dto.Metric
+}
+
+func (c prometheusHistogram) Reset() {
+}
+
+func (c prometheusHistogram) Update(n float64) {
+	atomic.AddUint64(c.c.Histogram.SampleCount, 1)
+	addFloat64(c.c.Histogram.SampleSum, n)
+	for _, b := range c.c.Histogram.Bucket {
+		if n > *b.UpperBound {
+			continue
+		}
+		atomic.AddUint64(b.CumulativeCount, 1)
+	}
+}
+
+func (c prometheusHistogram) UpdateDuration(n time.Time) {
+	x := time.Since(n).Seconds()
+	atomic.AddUint64(c.c.Histogram.SampleCount, 1)
+	addFloat64(c.c.Histogram.SampleSum, x)
+	for _, b := range c.c.Histogram.Bucket {
+		if x > *b.UpperBound {
+			continue
+		}
+		atomic.AddUint64(b.CumulativeCount, 1)
+	}
+}

prometheus.go

@@ -2,10 +2,10 @@ package prometheus
 
 import (
 	"fmt"
-	"hash/fnv"
 	"io"
 	"regexp"
 	"sync"
+	"sync/atomic"
 	"time"
 
 	"github.com/prometheus/client_golang/prometheus"
@@ -13,6 +13,8 @@ import (
 	dto "github.com/prometheus/client_model/go"
 	"github.com/prometheus/common/expfmt"
 	"go.unistack.org/micro/v3/meter"
+	xpool "go.unistack.org/micro/v3/util/xpool"
+	"google.golang.org/protobuf/types/known/timestamppb"
 )
 
 var _ meter.Meter = (*prometheusMeter)(nil)
@@ -20,43 +22,22 @@ var _ meter.Meter = (*prometheusMeter)(nil)
 type prometheusMeter struct {
 	opts         meter.Options
 	set          prometheus.Registerer
-	counter      *sync.Map
+	counter      sync.Map
-	floatCounter *sync.Map
+	floatCounter sync.Map
-	gauge        *sync.Map
+	gauge        sync.Map
-	histogram    *sync.Map
+	histogram    sync.Map
-	summary      *sync.Map
+	summary      sync.Map
-	sync.Mutex
+	mfPool       xpool.Pool[*dto.MetricFamily]
-}
+	mu           sync.Mutex
-
-type counters struct {
-	cs *sync.Map
-}
-
-type gauges struct {
-	cs *sync.Map
-}
-
-type histograms struct {
-	cs *sync.Map
-}
-
-type summaries struct {
-	cs *sync.Map
-}
-
-type floatCounters struct {
-	cs *sync.Map
 }
 
 func NewMeter(opts ...meter.Option) *prometheusMeter {
 	return &prometheusMeter{
 		set:  prometheus.NewRegistry(), // prometheus.DefaultRegisterer,
 		opts: meter.NewOptions(opts...),
-		counter:      &sync.Map{},
+		mfPool: xpool.NewPool[*dto.MetricFamily](func() *dto.MetricFamily {
-		floatCounter: &sync.Map{},
+			return &dto.MetricFamily{}
-		gauge:        &sync.Map{},
+		}),
-		histogram:    &sync.Map{},
-		summary:      &sync.Map{},
 	}
 }
 
@@ -65,161 +46,158 @@ func (m *prometheusMeter) Name() string {
 }
 
 func (m *prometheusMeter) Counter(name string, labels ...string) meter.Counter {
-	m.Lock()
+	clabels := meter.BuildLabels(append(m.opts.Labels, labels...)...)
-	defer m.Unlock()
+	h := newHash(name, clabels)
-	labels = append(m.opts.Labels, labels...)
+	m.mu.Lock()
-	vcd, ok := m.counter.Load(name)
+	c, ok := m.counter.Load(h)
-	h := newHash(labels)
+	// fmt.Printf("counter name %s hash %v labels %v\n", name, h, labels)
+	m.mu.Unlock()
 	if !ok {
-		cd := &counters{cs: &sync.Map{}}
+		var n float64
-		c := &prometheusCounter{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: name}), labels: labels}
+		c = &prometheusCounter{
-		cd.cs.Store(h, c)
+			name: name,
-		m.counter.Store(name, cd)
+			c: &dto.Metric{
-		return c
+				Gauge: &dto.Gauge{Value: &n},
+				Label: labelMetric(clabels),
+			},
 		}
-	cd := vcd.(*counters)
+		m.mu.Lock()
-	vc, ok := cd.cs.Load(h)
+		m.counter.Store(h, c)
-	if !ok {
+		m.mu.Unlock()
-		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.(*prometheusCounter)
-	return c
 }
 
 func (m *prometheusMeter) FloatCounter(name string, labels ...string) meter.FloatCounter {
-	m.Lock()
+	clabels := meter.BuildLabels(append(m.opts.Labels, labels...)...)
-	defer m.Unlock()
+	h := newHash(name, clabels)
-	labels = append(m.opts.Labels, labels...)
+	m.mu.Lock()
-	vcd, ok := m.floatCounter.Load(name)
+	c, ok := m.counter.Load(h)
-	h := newHash(labels)
+	m.mu.Unlock()
 	if !ok {
-		cd := &floatCounters{cs: &sync.Map{}}
+		var n float64
-		c := &prometheusFloatCounter{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: name}), labels: labels}
+		c = &prometheusFloatCounter{
-		cd.cs.Store(h, c)
+			name: name,
-		m.floatCounter.Store(name, cd)
+			c: &dto.Metric{
-		return c
+				Gauge: &dto.Gauge{Value: &n},
+				Label: labelMetric(clabels),
+			},
 		}
-	cd := vcd.(*floatCounters)
+		m.mu.Lock()
-	vc, ok := cd.cs.Load(h)
+		m.counter.Store(h, c)
-	if !ok {
+		m.mu.Unlock()
-		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.(*prometheusFloatCounter)
-	return c
 }
 
 func (m *prometheusMeter) Gauge(name string, fn func() float64, labels ...string) meter.Gauge {
-	m.Lock()
+	clabels := meter.BuildLabels(append(m.opts.Labels, labels...)...)
-	defer m.Unlock()
+	h := newHash(name, clabels)
-	labels = append(m.opts.Labels, labels...)
+	m.mu.Lock()
-	vcd, ok := m.gauge.Load(name)
+	c, ok := m.gauge.Load(h)
-	h := newHash(labels)
+	m.mu.Unlock()
 	if !ok {
-		cd := &gauges{cs: &sync.Map{}}
+		var n float64
-		c := &prometheusGauge{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: name}), labels: labels}
+		c = &prometheusGauge{
-		cd.cs.Store(h, c)
+			name: name,
-		m.gauge.Store(name, cd)
+			c: &dto.Metric{
-		return c
+				Gauge: &dto.Gauge{Value: &n},
+				Label: labelMetric(clabels),
+			},
 		}
-	cd := vcd.(*gauges)
+		m.mu.Lock()
-	vc, ok := cd.cs.Load(h)
+		m.gauge.Store(h, c)
-	if !ok {
+		m.mu.Unlock()
-		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.(*prometheusGauge)
-	return c
 }
 
 func (m *prometheusMeter) Histogram(name string, labels ...string) meter.Histogram {
-	m.Lock()
+	clabels := meter.BuildLabels(append(m.opts.Labels, labels...)...)
-	defer m.Unlock()
+	h := newHash(name, clabels)
-	labels = append(m.opts.Labels, labels...)
+	m.mu.Lock()
-	vcd, ok := m.histogram.Load(name)
+	c, ok := m.histogram.Load(h)
-	h := newHash(labels)
+	m.mu.Unlock()
 	if !ok {
-		cd := &histograms{cs: &sync.Map{}}
+		var n uint64
-		c := &prometheusHistogram{c: prometheus.NewHistogram(prometheus.HistogramOpts{Name: name}), labels: labels}
+		var s float64
-		cd.cs.Store(h, c)
+		buckets := make([]float64, len(prometheus.DefBuckets))
-		m.histogram.Store(name, cd)
+		copy(buckets, prometheus.DefBuckets)
-		return c
+		mdto := &dto.Metric{
+			Histogram: &dto.Histogram{
+				SampleCount:      &n,
+				SampleSum:        &s,
+				CreatedTimestamp: timestamppb.Now(),
+				Bucket:           make([]*dto.Bucket, len(buckets)),
+			},
+			Label: labelMetric(clabels),
 		}
-	cd := vcd.(*histograms)
+		for idx, b := range buckets {
-	vc, ok := cd.cs.Load(h)
+			var cc uint64
-	if !ok {
+			mdto.Histogram.Bucket[idx] = &dto.Bucket{CumulativeCount: &cc, UpperBound: &b}
-		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)
+		c = &prometheusHistogram{
-	return c
+			name: name,
+			c:    mdto,
+		}
+		m.mu.Lock()
+		m.histogram.Store(h, c)
+		m.mu.Unlock()
+	}
+	return c.(*prometheusHistogram)
 }
 
 func (m *prometheusMeter) Summary(name string, labels ...string) meter.Summary {
-	m.Lock()
+	clabels := meter.BuildLabels(append(m.opts.Labels, labels...)...)
-	defer m.Unlock()
+	h := newHash(name, clabels)
-	labels = append(m.opts.Labels, labels...)
+	m.mu.Lock()
-	vcd, ok := m.summary.Load(name)
+	c, ok := m.summary.Load(h)
-	h := newHash(labels)
+	m.mu.Unlock()
 	if !ok {
-		cd := &summaries{cs: &sync.Map{}}
+		var n uint64
-		c := &prometheusSummary{c: prometheus.NewSummary(prometheus.SummaryOpts{Name: name}), labels: labels}
+		var s float64
-		cd.cs.Store(h, c)
+		c = &prometheusSummary{
-		m.summary.Store(name, cd)
+			name: name,
-		return c
+			c: &dto.Metric{
+				Summary: &dto.Summary{
+					SampleCount:      &n,
+					SampleSum:        &s,
+					CreatedTimestamp: timestamppb.Now(),
+				},
+				Label: labelMetric(clabels),
+			},
 		}
-	cd := vcd.(*summaries)
+		m.mu.Lock()
-	vc, ok := cd.cs.Load(h)
+		m.summary.Store(h, c)
-	if !ok {
+		m.mu.Unlock()
-		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.(*prometheusSummary)
-	return c
 }
 
 func (m *prometheusMeter) SummaryExt(name string, window time.Duration, quantiles []float64, labels ...string) meter.Summary {
-	m.Lock()
+	clabels := meter.BuildLabels(append(m.opts.Labels, labels...)...)
-	defer m.Unlock()
+	h := newHash(name, clabels)
-	labels = append(m.opts.Labels, labels...)
+	m.mu.Lock()
-	vcd, ok := m.summary.Load(name)
+	c, ok := m.summary.Load(h)
-	h := newHash(labels)
+	m.mu.Lock()
 	if !ok {
-		cd := &summaries{cs: &sync.Map{}}
+		var n uint64
-		c := &prometheusSummary{c: prometheus.NewSummary(prometheus.SummaryOpts{
+		var s float64
-			Name:       name,
+		c = &prometheusSummary{
-			MaxAge:     window,
+			name: name,
-			Objectives: map[float64]float64{0.5: 0.05, 0.9: 0.01, 0.99: 0.001},
+			c: &dto.Metric{
-		}), labels: labels}
+				Summary: &dto.Summary{
-		cd.cs.Store(h, c)
+					SampleCount: &n,
-		m.summary.Store(name, cd)
+					SampleSum:   &s,
-		return c
+				},
+				Label: labelMetric(clabels),
+			},
 		}
-	cd := vcd.(*summaries)
+		m.mu.Lock()
-	vc, ok := cd.cs.Load(h)
+		m.summary.Store(h, c)
-	if !ok {
+		m.mu.Unlock()
-		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.Store(h, c)
-		m.summary.Store(name, cd)
-		return c
 	}
-	c := vc.(*prometheusSummary)
+	return c.(*prometheusSummary)
-	return c
 }
 
 func (m *prometheusMeter) Init(opts ...meter.Option) error {
@@ -255,98 +233,74 @@ func (m *prometheusMeter) Write(w io.Writer, opts ...meter.Option) error {
 
 	enc := expfmt.NewEncoder(w, expfmt.NewFormat(expfmt.TypeTextPlain))
 
-	m.counter.Range(func(k, v any) bool {
+	m.mu.Lock()
-		name := k.(string)
+
-		mf := &dto.MetricFamily{
+	m.counter.Range(func(_ any, v any) bool {
-			Name: &name,
+		mc := v.(*prometheusCounter)
-			Type: dto.MetricType_GAUGE.Enum(),
+		mf := m.mfPool.Get()
-		}
+		mf.Name = &mc.name
-		v.(*counters).cs.Range(func(_, nv any) bool {
+		mf.Type = dto.MetricType_GAUGE.Enum()
-			c := nv.(*prometheusCounter)
+		n := getFloat64(&(mc.n))
-			m := &dto.Metric{}
+		mc.c.Gauge.Value = &n
-			_ = c.c.Write(m)
+		mf.Metric = append(mf.Metric, mc.c)
-			fillMetric(m, c.labels)
-			mf.Metric = append(mf.Metric, m)
-			return true
-		})
 		mfs = append(mfs, mf)
 		return true
 	})
 
-	m.gauge.Range(func(k, v any) bool {
+	m.floatCounter.Range(func(_ any, v any) bool {
-		name := k.(string)
+		mc := v.(*prometheusFloatCounter)
-		mf := &dto.MetricFamily{
+		mf := m.mfPool.Get()
-			Name: &name,
+		mf.Name = &mc.name
-			Type: dto.MetricType_GAUGE.Enum(),
+		mf.Type = dto.MetricType_GAUGE.Enum()
-		}
+		n := getFloat64(&(mc.n))
-		v.(*gauges).cs.Range(func(_, nv any) bool {
+		mc.c.Gauge.Value = &n
-			c := nv.(*prometheusGauge)
+		mf.Metric = append(mf.Metric, mc.c)
-			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
 	})
 
-	m.floatCounter.Range(func(k, v any) bool {
+	m.gauge.Range(func(_ any, v any) bool {
-		name := k.(string)
+		mc := v.(*prometheusGauge)
-		mf := &dto.MetricFamily{
+		mf := m.mfPool.Get()
-			Name: &name,
+		mf.Name = &mc.name
-			Type: dto.MetricType_GAUGE.Enum(),
+		mf.Type = dto.MetricType_GAUGE.Enum()
-		}
+		n := getFloat64(&(mc.n))
-		v.(*floatCounters).cs.Range(func(_, nv any) bool {
+		mc.c.Gauge.Value = &n
-			c := nv.(*prometheusFloatCounter)
+		mf.Metric = append(mf.Metric, mc.c)
-			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
 	})
 
-	m.histogram.Range(func(k, v any) bool {
+	m.histogram.Range(func(_ any, v any) bool {
-		name := k.(string)
+		c := v.(*prometheusHistogram)
-		mf := &dto.MetricFamily{
+		mf := m.mfPool.Get()
-			Name: &name,
+		mf.Name = &c.name
-			Type: dto.MetricType_HISTOGRAM.Enum(),
+		mf.Type = dto.MetricType_HISTOGRAM.Enum()
-		}
+		mf.Metric = append(mf.Metric, c.c)
-		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
 	})
 
-	m.summary.Range(func(k, v any) bool {
+	m.summary.Range(func(_ any, v any) bool {
-		name := k.(string)
+		mc := v.(*prometheusSummary)
-		mf := &dto.MetricFamily{
+		mf := m.mfPool.Get()
-			Name: &name,
+		mf.Name = &mc.name
-			Type: dto.MetricType_SUMMARY.Enum(),
+		mf.Type = dto.MetricType_SUMMARY.Enum()
-		}
+		sc := atomic.LoadUint64(&(mc.sampleCount))
-		v.(*summaries).cs.Range(func(_, nv any) bool {
+		mc.c.Summary.SampleCount = &sc
-			c := nv.(*prometheusSummary)
+		ss := getFloat64(&(mc.SampleSum))
-			m := &dto.Metric{}
+		mc.c.Summary.SampleSum = &ss
-			_ = c.c.Write(m)
+		mf.Metric = append(mf.Metric, mc.c)
-			fillMetric(m, c.labels)
-			mf.Metric = append(mf.Metric, m)
-			return true
-		})
 		mfs = append(mfs, mf)
 		return true
 	})
 
+	m.mu.Unlock()
+
 	for _, mf := range mfs {
 		_ = enc.Encode(mf)
+		mf.Reset()
+		m.mfPool.Put(mf)
 	}
 
 	if closer, ok := enc.(io.Closer); ok {
@@ -390,124 +344,30 @@ func (m *prometheusMeter) Set(opts ...meter.Option) meter.Meter {
 	return nm
 }
 
-type prometheusCounter struct {
+func labelMetric(labels []string) []*dto.LabelPair {
-	c      prometheus.Gauge
+	nl := make([]string, len(labels))
-	labels []string
+	copy(nl, labels)
-}
+	dtoLabels := make([]*dto.LabelPair, 0, len(nl)/2)
-
+	for idx := 0; idx < len(nl); idx += 2 {
-func (c *prometheusCounter) Add(n int) {
+		dtoLabels = append(dtoLabels, &dto.LabelPair{
-	c.c.Add(float64(n))
+			Name:  &(nl[idx]),
-}
+			Value: &(nl[idx+1]),
-
-func (c *prometheusCounter) Dec() {
-	c.c.Dec()
-}
-
-func (c *prometheusCounter) Inc() {
-	c.c.Inc()
-}
-
-func (c *prometheusCounter) Get() uint64 {
-	m := &dto.Metric{}
-	if err := c.c.Write(m); err != nil {
-		return 0
-	}
-	return uint64(m.GetGauge().GetValue())
-}
-
-func (c *prometheusCounter) Set(n uint64) {
-	c.c.Set(float64(n))
-}
-
-type prometheusFloatCounter struct {
-	c      prometheus.Gauge
-	labels []string
-}
-
-func (c prometheusFloatCounter) Add(n float64) {
-	c.c.Add(n)
-}
-
-func (c prometheusFloatCounter) Get() float64 {
-	m := &dto.Metric{}
-	if err := c.c.Write(m); err != nil {
-		return 0
-	}
-	return m.GetGauge().GetValue()
-}
-
-func (c prometheusFloatCounter) Set(n float64) {
-	c.c.Set(n)
-}
-
-func (c prometheusFloatCounter) Sub(n float64) {
-	c.c.Add(-n)
-}
-
-type prometheusGauge struct {
-	c      prometheus.Gauge
-	labels []string
-}
-
-func (c prometheusGauge) Get() float64 {
-	m := &dto.Metric{}
-	if err := c.c.Write(m); err != nil {
-		return 0
-	}
-	return float64(m.GetGauge().GetValue())
-}
-
-type prometheusHistogram struct {
-	c      prometheus.Histogram
-	labels []string
-}
-
-func (c prometheusHistogram) Reset() {
-}
-
-func (c prometheusHistogram) Update(n float64) {
-	c.c.Observe(n)
-}
-
-func (c prometheusHistogram) UpdateDuration(n time.Time) {
-	c.c.Observe(time.Since(n).Seconds())
-}
-
-type prometheusSummary struct {
-	c      prometheus.Summary
-	labels []string
-}
-
-func (c prometheusSummary) Update(n float64) {
-	c.c.Observe(n)
-}
-
-func (c prometheusSummary) UpdateDuration(n time.Time) {
-	c.c.Observe(time.Since(n).Seconds())
-}
-
-func newHash(labels []string) uint64 {
-	labels = meter.BuildLabels(labels...)
-	h := fnv.New64a()
-	for _, l := range labels {
-		h.Write([]byte(l))
-	}
-	return h.Sum64()
-}
-
-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:  &(labels[idx]),
-			Value: &(labels[idx+1]),
 		})
-		seen[labels[idx]] = true
 	}
-	return m
+	return dtoLabels
+}
+
+func newHash(n string, l []string) uint64 {
+	h := uint64(14695981039346656037)
+	for i := 0; i < len(n); i++ {
+		h ^= uint64(n[i])
+		h *= 1099511628211
+	}
+	for _, s := range l {
+		for i := 0; i < len(s); i++ {
+			h ^= uint64(s[i])
+			h *= 1099511628211
+		}
+	}
+	return h
 }

prometheus_test.go

@@ -3,13 +3,125 @@ package prometheus
 import (
 	"bytes"
 	"context"
+	"fmt"
 	"testing"
 
+	"github.com/prometheus/client_golang/prometheus"
+	dto "github.com/prometheus/client_model/go"
+	"github.com/prometheus/common/expfmt"
 	"go.unistack.org/micro/v3/client"
 	"go.unistack.org/micro/v3/codec"
 	"go.unistack.org/micro/v3/meter"
 )
 
+func TestHash(t *testing.T) {
+	m := NewMeter() // meter.Labels("test_key", "test_val"))
+
+	buf := bytes.NewBuffer(nil)
+
+	for i := 0; i < 100000; i++ {
+		go func() {
+			m.Counter("micro_server_request_total", "code", "16",
+				"endpoint", "/clientprofile.ClientProfileService/GetClientProfile",
+				"status", "failure").Inc()
+			m.Counter("micro_server_request_total", "code", "16",
+				"endpoint", "/clientproduct.ClientProductService/GetDepositProducts",
+				"status", "failure").Inc()
+			m.Counter("micro_server_request_total", "code", "16",
+				"endpoint", "/operationsinfo.OperationsInfoService/GetOperations",
+				"status", "failure").Inc()
+		}()
+	}
+	_ = m.Write(buf)
+	t.Logf("h1: %s\n", buf.Bytes())
+}
+
+func TestHistogram(t *testing.T) {
+	m := NewMeter()
+	name := "test"
+	m.Histogram(name, "endpoint").Update(1)
+	m.Histogram(name, "endpoint").Update(1)
+	m.Histogram(name, "endpoint").Update(5)
+	m.Histogram(name, "endpoint").Update(10)
+	m.Histogram(name, "endpoint").Update(10)
+	m.Histogram(name, "endpoint").Update(30)
+	mbuf := bytes.NewBuffer(nil)
+	_ = m.Write(mbuf, meter.WriteProcessMetrics(false), meter.WriteFDMetrics(false))
+
+	/*
+		if !bytes.Contains(buf.Bytes(), []byte(`micro_server_sum{endpoint="ep1",path="/path1"} 20`)) {
+			t.Fatalf("invalid metrics output: %s", buf.Bytes())
+		}
+
+		if !bytes.Contains(buf.Bytes(), []byte(`micro_server_count{endpoint="ep1",path="/path1"} 2`)) {
+			t.Fatalf("invalid metrics output: %s", buf.Bytes())
+		}
+	*/
+	p := prometheus.NewHistogram(prometheus.HistogramOpts{Name: name})
+	p.Observe(1)
+	p.Observe(1)
+	p.Observe(5)
+	p.Observe(10)
+	p.Observe(10)
+	p.Observe(30)
+	mdto := &dto.Metric{}
+	_ = p.Write(mdto)
+	pbuf := bytes.NewBuffer(nil)
+	enc := expfmt.NewEncoder(pbuf, expfmt.NewFormat(expfmt.TypeTextPlain))
+	mf := &dto.MetricFamily{Name: &name, Type: dto.MetricType_HISTOGRAM.Enum(), Metric: []*dto.Metric{mdto}}
+	_ = enc.Encode(mf)
+
+	if !bytes.Equal(mbuf.Bytes(), pbuf.Bytes()) {
+		fmt.Printf("m\n%s\n", mbuf.Bytes())
+		fmt.Printf("m\n%s\n", pbuf.Bytes())
+	}
+}
+
+func TestSummary(t *testing.T) {
+	t.Skip()
+	name := "micro_server"
+	m := NewMeter()
+	m.Summary("micro_server").Update(1)
+	m.Summary("micro_server").Update(1)
+	m.Summary("micro_server").Update(5)
+	m.Summary("micro_server").Update(10)
+	m.Summary("micro_server").Update(10)
+	m.Summary("micro_server").Update(30)
+	mbuf := bytes.NewBuffer(nil)
+	_ = m.Write(mbuf, meter.WriteProcessMetrics(false), meter.WriteFDMetrics(false))
+
+	if !bytes.Contains(mbuf.Bytes(), []byte(`micro_server_sum 57`)) {
+		t.Fatalf("invalid metrics output: %s", mbuf.Bytes())
+	}
+
+	if !bytes.Contains(mbuf.Bytes(), []byte(`micro_server_count 6`)) {
+		t.Fatalf("invalid metrics output: %s", mbuf.Bytes())
+	}
+
+	objectives := make(map[float64]float64)
+	for _, c := range meter.DefaultSummaryQuantiles {
+		objectives[c] = c
+	}
+	p := prometheus.NewSummary(prometheus.SummaryOpts{Name: name, Objectives: objectives, MaxAge: meter.DefaultSummaryWindow})
+	p.Observe(1)
+	p.Observe(1)
+	p.Observe(5)
+	p.Observe(10)
+	p.Observe(10)
+	p.Observe(30)
+	mdto := &dto.Metric{}
+	_ = p.Write(mdto)
+	pbuf := bytes.NewBuffer(nil)
+	enc := expfmt.NewEncoder(pbuf, expfmt.NewFormat(expfmt.TypeTextPlain))
+	mf := &dto.MetricFamily{Name: &name, Type: dto.MetricType_SUMMARY.Enum(), Metric: []*dto.Metric{mdto}}
+	_ = enc.Encode(mf)
+
+	if !bytes.Equal(mbuf.Bytes(), pbuf.Bytes()) {
+		fmt.Printf("m\n%s\n", mbuf.Bytes())
+		fmt.Printf("m\n%s\n", pbuf.Bytes())
+	}
+}
+
 func TestStd(t *testing.T) {
 	m := NewMeter(meter.WriteProcessMetrics(true), meter.WriteFDMetrics(true))
 	if err := m.Init(); err != nil {
@@ -56,7 +168,9 @@ func TestMultiple(t *testing.T) {
 	buf := bytes.NewBuffer(nil)
 	_ = m.Write(buf, meter.WriteProcessMetrics(false), meter.WriteFDMetrics(false))
 	if !bytes.Contains(buf.Bytes(), []byte(`micro_server{endpoint="ep1",path="/path1"} 2`)) {
-		// t.Fatal("XXXX")
+		t.Fatalf("invalid metrics output: %s", buf.Bytes())
+	}
+	if !bytes.Contains(buf.Bytes(), []byte(`micro_server{endpoint="ep3",path="/path3",status="success"} 1`)) {
 		t.Fatalf("invalid metrics output: %s", buf.Bytes())
 	}
 }

summary.go

@@ -0,0 +1,26 @@
+package prometheus
+
+import (
+	"sync/atomic"
+	"time"
+
+	dto "github.com/prometheus/client_model/go"
+)
+
+type prometheusSummary struct {
+	name        string
+	c           *dto.Metric
+	sampleCount uint64
+	SampleSum   float64
+}
+
+func (c *prometheusSummary) Update(n float64) {
+	atomic.AddUint64(&(c.sampleCount), 1)
+	addFloat64(&(c.SampleSum), n)
+}
+
+func (c *prometheusSummary) UpdateDuration(t time.Time) {
+	n := time.Since(t).Seconds()
+	atomic.AddUint64(&(c.sampleCount), 1)
+	addFloat64(&(c.SampleSum), n)
+}