fixup golang std metrics

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 +1,19 @@
+# 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

.gitignore

@@ -0,0 +1 @@
+.idea

.synced

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

LICENSE

@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
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+      risks associated with Your exercise of permissions under this License.
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+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
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+      Work (including but not limited to damages for loss of goodwill,
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+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
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+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
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+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
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+       http://www.apache.org/licenses/LICENSE-2.0
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+   Unless required by applicable law or agreed to in writing, software
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README.md

@@ -1,23 +0,0 @@
-# Prometheus
-
-Wrappers are a form of middleware that can be used with go-micro services. They can wrap both the Client and Server handlers.
-This plugin implements the HandlerWrapper interface to provide automatic prometheus metric handling
-for each microservice method execution time and operation count for success and failed cases.
-
-This handler will export two metrics to prometheus:
-* **micro_request_total**. How many go-micro requests processed, partitioned by method and status.
-* **micro_request_duration_microseconds**. Service method request latencies in microseconds, partitioned by method.
-
-# Usage
-
-When creating your service, add the wrapper like so.
-
-```go
-    service := micro.NewService(
-        micro.Name("service name"),
-	micro.Version("latest"),
-	micro.WrapHandler(prometheus.NewHandlerWrapper()),
-    )
-
-    service.Init()
-```

go.mod

@@ -1,12 +1,324 @@
-module github.com/micro/go-plugins/wrapper/monitoring/prometheus/v2
+module go.unistack.org/micro-meter-prometheus/v3
 
-go 1.13
+go 1.21
+
+toolchain go1.22.0
 
 require (
-	github.com/micro/go-micro/v2 v2.9.1-0.20200716153311-f9bf56239306
-	github.com/prometheus/client_golang v1.5.1
-	github.com/prometheus/client_model v0.2.0
-	github.com/stretchr/testify v1.4.0
+	github.com/prometheus/client_golang v1.19.0
+	github.com/prometheus/client_model v0.6.0
+	github.com/prometheus/common v0.51.1
+	go.unistack.org/micro/v3 v3.10.53
 )
 
-replace github.com/coreos/etcd => github.com/ozonru/etcd v3.3.20-grpc1.27-origmodule+incompatible
+require (
+	cloud.google.com/go v0.110.2 // indirect
+	cloud.google.com/go/accessapproval v1.6.0 // indirect
+	cloud.google.com/go/accesscontextmanager v1.7.0 // indirect
+	cloud.google.com/go/aiplatform v1.37.0 // indirect
+	cloud.google.com/go/analytics v0.19.0 // indirect
+	cloud.google.com/go/apigateway v1.5.0 // indirect
+	cloud.google.com/go/apigeeconnect v1.5.0 // indirect
+	cloud.google.com/go/apigeeregistry v0.6.0 // indirect
+	cloud.google.com/go/apikeys v0.6.0 // indirect
+	cloud.google.com/go/appengine v1.7.1 // indirect
+	cloud.google.com/go/area120 v0.7.1 // indirect
+	cloud.google.com/go/artifactregistry v1.13.0 // indirect
+	cloud.google.com/go/asset v1.13.0 // indirect
+	cloud.google.com/go/assuredworkloads v1.10.0 // indirect
+	cloud.google.com/go/automl v1.12.0 // indirect
+	cloud.google.com/go/baremetalsolution v0.5.0 // indirect
+	cloud.google.com/go/batch v0.7.0 // indirect
+	cloud.google.com/go/beyondcorp v0.5.0 // indirect
+	cloud.google.com/go/bigquery v1.50.0 // indirect
+	cloud.google.com/go/billing v1.13.0 // indirect
+	cloud.google.com/go/binaryauthorization v1.5.0 // indirect
+	cloud.google.com/go/certificatemanager v1.6.0 // indirect
+	cloud.google.com/go/channel v1.12.0 // indirect
+	cloud.google.com/go/cloudbuild v1.9.0 // indirect
+	cloud.google.com/go/clouddms v1.5.0 // indirect
+	cloud.google.com/go/cloudtasks v1.10.0 // indirect
+	cloud.google.com/go/compute v1.20.1 // indirect
+	cloud.google.com/go/compute/metadata v0.2.3 // indirect
+	cloud.google.com/go/contactcenterinsights v1.6.0 // indirect
+	cloud.google.com/go/container v1.15.0 // indirect
+	cloud.google.com/go/containeranalysis v0.9.0 // indirect
+	cloud.google.com/go/datacatalog v1.13.0 // indirect
+	cloud.google.com/go/dataflow v0.8.0 // indirect
+	cloud.google.com/go/dataform v0.7.0 // indirect
+	cloud.google.com/go/datafusion v1.6.0 // indirect
+	cloud.google.com/go/datalabeling v0.7.0 // indirect
+	cloud.google.com/go/dataplex v1.6.0 // indirect
+	cloud.google.com/go/dataproc v1.12.0 // indirect
+	cloud.google.com/go/dataqna v0.7.0 // indirect
+	cloud.google.com/go/datastore v1.11.0 // indirect
+	cloud.google.com/go/datastream v1.7.0 // indirect
+	cloud.google.com/go/deploy v1.8.0 // indirect
+	cloud.google.com/go/dialogflow v1.32.0 // indirect
+	cloud.google.com/go/dlp v1.9.0 // indirect
+	cloud.google.com/go/documentai v1.18.0 // indirect
+	cloud.google.com/go/domains v0.8.0 // indirect
+	cloud.google.com/go/edgecontainer v1.0.0 // indirect
+	cloud.google.com/go/errorreporting v0.3.0 // indirect
+	cloud.google.com/go/essentialcontacts v1.5.0 // indirect
+	cloud.google.com/go/eventarc v1.11.0 // indirect
+	cloud.google.com/go/filestore v1.6.0 // indirect
+	cloud.google.com/go/firestore v1.9.0 // indirect
+	cloud.google.com/go/functions v1.13.0 // indirect
+	cloud.google.com/go/gaming v1.9.0 // indirect
+	cloud.google.com/go/gkebackup v0.4.0 // indirect
+	cloud.google.com/go/gkeconnect v0.7.0 // indirect
+	cloud.google.com/go/gkehub v0.12.0 // indirect
+	cloud.google.com/go/gkemulticloud v0.5.0 // indirect
+	cloud.google.com/go/grafeas v0.2.0 // indirect
+	cloud.google.com/go/gsuiteaddons v1.5.0 // indirect
+	cloud.google.com/go/iam v0.13.0 // indirect
+	cloud.google.com/go/iap v1.7.1 // indirect
+	cloud.google.com/go/ids v1.3.0 // indirect
+	cloud.google.com/go/iot v1.6.0 // indirect
+	cloud.google.com/go/kms v1.10.1 // indirect
+	cloud.google.com/go/language v1.9.0 // indirect
+	cloud.google.com/go/lifesciences v0.8.0 // indirect
+	cloud.google.com/go/logging v1.7.0 // indirect
+	cloud.google.com/go/longrunning v0.4.1 // indirect
+	cloud.google.com/go/managedidentities v1.5.0 // indirect
+	cloud.google.com/go/maps v0.7.0 // indirect
+	cloud.google.com/go/mediatranslation v0.7.0 // indirect
+	cloud.google.com/go/memcache v1.9.0 // indirect
+	cloud.google.com/go/metastore v1.10.0 // indirect
+	cloud.google.com/go/monitoring v1.13.0 // indirect
+	cloud.google.com/go/networkconnectivity v1.11.0 // indirect
+	cloud.google.com/go/networkmanagement v1.6.0 // indirect
+	cloud.google.com/go/networksecurity v0.8.0 // indirect
+	cloud.google.com/go/notebooks v1.8.0 // indirect
+	cloud.google.com/go/optimization v1.3.1 // indirect
+	cloud.google.com/go/orchestration v1.6.0 // indirect
+	cloud.google.com/go/orgpolicy v1.10.0 // indirect
+	cloud.google.com/go/osconfig v1.11.0 // indirect
+	cloud.google.com/go/oslogin v1.9.0 // indirect
+	cloud.google.com/go/phishingprotection v0.7.0 // indirect
+	cloud.google.com/go/policytroubleshooter v1.6.0 // indirect
+	cloud.google.com/go/privatecatalog v0.8.0 // indirect
+	cloud.google.com/go/pubsub v1.30.0 // indirect
+	cloud.google.com/go/pubsublite v1.7.0 // indirect
+	cloud.google.com/go/recaptchaenterprise v1.3.1 // indirect
+	cloud.google.com/go/recaptchaenterprise/v2 v2.7.0 // indirect
+	cloud.google.com/go/recommendationengine v0.7.0 // indirect
+	cloud.google.com/go/recommender v1.9.0 // indirect
+	cloud.google.com/go/redis v1.11.0 // indirect
+	cloud.google.com/go/resourcemanager v1.7.0 // indirect
+	cloud.google.com/go/resourcesettings v1.5.0 // indirect
+	cloud.google.com/go/retail v1.12.0 // indirect
+	cloud.google.com/go/run v0.9.0 // indirect
+	cloud.google.com/go/scheduler v1.9.0 // indirect
+	cloud.google.com/go/secretmanager v1.10.0 // indirect
+	cloud.google.com/go/security v1.13.0 // indirect
+	cloud.google.com/go/securitycenter v1.19.0 // indirect
+	cloud.google.com/go/servicecontrol v1.11.1 // indirect
+	cloud.google.com/go/servicedirectory v1.9.0 // indirect
+	cloud.google.com/go/servicemanagement v1.8.0 // indirect
+	cloud.google.com/go/serviceusage v1.6.0 // indirect
+	cloud.google.com/go/shell v1.6.0 // indirect
+	cloud.google.com/go/spanner v1.45.0 // indirect
+	cloud.google.com/go/speech v1.15.0 // indirect
+	cloud.google.com/go/storage v1.29.0 // indirect
+	cloud.google.com/go/storagetransfer v1.8.0 // indirect
+	cloud.google.com/go/talent v1.5.0 // indirect
+	cloud.google.com/go/texttospeech v1.6.0 // indirect
+	cloud.google.com/go/tpu v1.5.0 // indirect
+	cloud.google.com/go/trace v1.9.0 // indirect
+	cloud.google.com/go/translate v1.7.0 // indirect
+	cloud.google.com/go/video v1.15.0 // indirect
+	cloud.google.com/go/videointelligence v1.10.0 // indirect
+	cloud.google.com/go/vision v1.2.0 // indirect
+	cloud.google.com/go/vision/v2 v2.7.0 // indirect
+	cloud.google.com/go/vmmigration v1.6.0 // indirect
+	cloud.google.com/go/vmwareengine v0.3.0 // indirect
+	cloud.google.com/go/vpcaccess v1.6.0 // indirect
+	cloud.google.com/go/webrisk v1.8.0 // indirect
+	cloud.google.com/go/websecurityscanner v1.5.0 // indirect
+	cloud.google.com/go/workflows v1.10.0 // indirect
+	dario.cat/mergo v1.0.0 // indirect
+	dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9 // indirect
+	gioui.org v0.0.0-20210308172011-57750fc8a0a6 // indirect
+	git.sr.ht/~sbinet/gg v0.3.1 // indirect
+	github.com/BurntSushi/toml v0.3.1 // indirect
+	github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802 // indirect
+	github.com/DATA-DOG/go-sqlmock v1.5.0 // indirect
+	github.com/JohnCGriffin/overflow v0.0.0-20211019200055-46fa312c352c // indirect
+	github.com/OneOfOne/xxhash v1.2.2 // indirect
+	github.com/ajstarks/deck v0.0.0-20200831202436-30c9fc6549a9 // indirect
+	github.com/ajstarks/deck/generate v0.0.0-20210309230005-c3f852c02e19 // indirect
+	github.com/ajstarks/svgo v0.0.0-20211024235047-1546f124cd8b // indirect
+	github.com/alecthomas/kingpin/v2 v2.4.0 // indirect
+	github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751 // indirect
+	github.com/alecthomas/units v0.0.0-20211218093645-b94a6e3cc137 // indirect
+	github.com/andybalholm/brotli v1.0.4 // indirect
+	github.com/antihax/optional v1.0.0 // indirect
+	github.com/apache/arrow/go/v10 v10.0.1 // indirect
+	github.com/apache/arrow/go/v11 v11.0.0 // indirect
+	github.com/apache/thrift v0.16.0 // indirect
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/boombuler/barcode v1.0.1 // indirect
+	github.com/census-instrumentation/opencensus-proto v0.4.1 // indirect
+	github.com/cespare/xxhash v1.1.0 // indirect
+	github.com/cespare/xxhash/v2 v2.2.0 // indirect
+	github.com/chzyer/logex v1.1.10 // indirect
+	github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e // indirect
+	github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1 // indirect
+	github.com/client9/misspell v0.3.4 // indirect
+	github.com/cncf/udpa/go v0.0.0-20220112060539-c52dc94e7fbe // indirect
+	github.com/cncf/xds/go v0.0.0-20230607035331-e9ce68804cb4 // indirect
+	github.com/creack/pty v1.1.9 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/docopt/docopt-go v0.0.0-20180111231733-ee0de3bc6815 // indirect
+	github.com/dustin/go-humanize v1.0.0 // indirect
+	github.com/envoyproxy/go-control-plane v0.11.1-0.20230524094728-9239064ad72f // indirect
+	github.com/envoyproxy/protoc-gen-validate v0.10.1 // indirect
+	github.com/fogleman/gg v1.3.0 // indirect
+	github.com/ghodss/yaml v1.0.0 // indirect
+	github.com/go-fonts/dejavu v0.1.0 // indirect
+	github.com/go-fonts/latin-modern v0.2.0 // indirect
+	github.com/go-fonts/liberation v0.2.0 // indirect
+	github.com/go-fonts/stix v0.1.0 // indirect
+	github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1 // indirect
+	github.com/go-gl/glfw/v3.3/glfw v0.0.0-20200222043503-6f7a984d4dc4 // indirect
+	github.com/go-kit/kit v0.9.0 // indirect
+	github.com/go-kit/log v0.2.1 // indirect
+	github.com/go-latex/latex v0.0.0-20210823091927-c0d11ff05a81 // indirect
+	github.com/go-logfmt/logfmt v0.5.1 // indirect
+	github.com/go-pdf/fpdf v0.6.0 // indirect
+	github.com/go-stack/stack v1.8.0 // indirect
+	github.com/goccy/go-json v0.9.11 // indirect
+	github.com/gogo/protobuf v1.1.1 // indirect
+	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 // indirect
+	github.com/golang/glog v1.1.0 // indirect
+	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
+	github.com/golang/mock v1.6.0 // indirect
+	github.com/golang/protobuf v1.5.4 // indirect
+	github.com/golang/snappy v0.0.4 // indirect
+	github.com/google/btree v1.0.0 // indirect
+	github.com/google/flatbuffers v2.0.8+incompatible // indirect
+	github.com/google/go-cmp v0.6.0 // indirect
+	github.com/google/gofuzz v1.0.0 // indirect
+	github.com/google/martian v2.1.0+incompatible // indirect
+	github.com/google/martian/v3 v3.3.2 // indirect
+	github.com/google/pprof v0.0.0-20210720184732-4bb14d4b1be1 // indirect
+	github.com/google/renameio v0.1.0 // indirect
+	github.com/google/s2a-go v0.1.4 // indirect
+	github.com/google/uuid v1.3.0 // indirect
+	github.com/googleapis/enterprise-certificate-proxy v0.2.3 // indirect
+	github.com/googleapis/gax-go/v2 v2.11.0 // indirect
+	github.com/googleapis/go-type-adapters v1.0.0 // indirect
+	github.com/googleapis/google-cloud-go-testing v0.0.0-20200911160855-bcd43fbb19e8 // indirect
+	github.com/grpc-ecosystem/grpc-gateway v1.16.0 // indirect
+	github.com/grpc-ecosystem/grpc-gateway/v2 v2.11.3 // indirect
+	github.com/hashicorp/golang-lru v0.5.1 // indirect
+	github.com/iancoleman/strcase v0.2.0 // indirect
+	github.com/ianlancetaylor/demangle v0.0.0-20200824232613-28f6c0f3b639 // indirect
+	github.com/imdario/mergo v0.3.13 // indirect
+	github.com/jpillora/backoff v1.0.0 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/jstemmer/go-junit-report v0.9.1 // indirect
+	github.com/julienschmidt/httprouter v1.3.0 // indirect
+	github.com/jung-kurt/gofpdf v1.0.3-0.20190309125859-24315acbbda5 // indirect
+	github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51 // indirect
+	github.com/kisielk/gotool v1.0.0 // indirect
+	github.com/klauspost/asmfmt v1.3.2 // indirect
+	github.com/klauspost/compress v1.15.9 // indirect
+	github.com/klauspost/cpuid/v2 v2.0.9 // indirect
+	github.com/konsorten/go-windows-terminal-sequences v1.0.3 // indirect
+	github.com/kr/fs v0.1.0 // indirect
+	github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515 // indirect
+	github.com/kr/pretty v0.3.1 // indirect
+	github.com/kr/pty v1.1.1 // indirect
+	github.com/kr/text v0.2.0 // indirect
+	github.com/lyft/protoc-gen-star v0.6.1 // indirect
+	github.com/lyft/protoc-gen-star/v2 v2.0.1 // indirect
+	github.com/mattn/go-isatty v0.0.16 // indirect
+	github.com/mattn/go-sqlite3 v1.14.14 // indirect
+	github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
+	github.com/matttproud/golang_protobuf_extensions/v2 v2.0.0 // indirect
+	github.com/minio/asm2plan9s v0.0.0-20200509001527-cdd76441f9d8 // indirect
+	github.com/minio/c2goasm v0.0.0-20190812172519-36a3d3bbc4f3 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f // indirect
+	github.com/patrickmn/go-cache v2.1.0+incompatible // indirect
+	github.com/phpdave11/gofpdf v1.4.2 // indirect
+	github.com/phpdave11/gofpdi v1.0.13 // indirect
+	github.com/pierrec/lz4/v4 v4.1.15 // indirect
+	github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/pkg/sftp v1.13.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/prometheus/procfs v0.13.0 // indirect
+	github.com/remyoudompheng/bigfft v0.0.0-20200410134404-eec4a21b6bb0 // indirect
+	github.com/rogpeppe/fastuuid v1.2.0 // indirect
+	github.com/rogpeppe/go-internal v1.10.0 // indirect
+	github.com/ruudk/golang-pdf417 v0.0.0-20201230142125-a7e3863a1245 // indirect
+	github.com/silas/dag v0.0.0-20220518035006-a7e85ada93c5 // indirect
+	github.com/sirupsen/logrus v1.6.0 // indirect
+	github.com/spaolacci/murmur3 v0.0.0-20180118202830-f09979ecbc72 // indirect
+	github.com/spf13/afero v1.9.2 // indirect
+	github.com/stretchr/objx v0.5.0 // indirect
+	github.com/stretchr/testify v1.8.3 // indirect
+	github.com/xhit/go-str2duration v1.2.0 // indirect
+	github.com/xhit/go-str2duration/v2 v2.1.0 // indirect
+	github.com/yuin/goldmark v1.4.13 // indirect
+	github.com/zeebo/assert v1.3.0 // indirect
+	github.com/zeebo/xxh3 v1.0.2 // indirect
+	go.opencensus.io v0.24.0 // indirect
+	go.opentelemetry.io/proto/otlp v0.19.0 // indirect
+	golang.org/x/crypto v0.21.0 // indirect
+	golang.org/x/exp v0.0.0-20220827204233-334a2380cb91 // indirect
+	golang.org/x/image v0.0.0-20220302094943-723b81ca9867 // indirect
+	golang.org/x/lint v0.0.0-20210508222113-6edffad5e616 // indirect
+	golang.org/x/mobile v0.0.0-20190719004257-d2bd2a29d028 // indirect
+	golang.org/x/mod v0.9.0 // indirect
+	golang.org/x/net v0.22.0 // indirect
+	golang.org/x/oauth2 v0.18.0 // indirect
+	golang.org/x/sync v0.6.0 // indirect
+	golang.org/x/sys v0.18.0 // indirect
+	golang.org/x/term v0.18.0 // indirect
+	golang.org/x/text v0.14.0 // indirect
+	golang.org/x/time v0.3.0 // indirect
+	golang.org/x/tools v0.7.0 // indirect
+	golang.org/x/xerrors v0.0.0-20220907171357-04be3eba64a2 // indirect
+	gonum.org/v1/gonum v0.11.0 // indirect
+	gonum.org/v1/netlib v0.0.0-20190313105609-8cb42192e0e0 // indirect
+	gonum.org/v1/plot v0.10.1 // indirect
+	google.golang.org/api v0.126.0 // indirect
+	google.golang.org/appengine v1.6.7 // indirect
+	google.golang.org/genproto v0.0.0-20230530153820-e85fd2cbaebc // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20230530153820-e85fd2cbaebc // indirect
+	google.golang.org/genproto/googleapis/bytestream v0.0.0-20230530153820-e85fd2cbaebc // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20230530153820-e85fd2cbaebc // indirect
+	google.golang.org/grpc v1.57.0 // indirect
+	google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.1.0 // indirect
+	google.golang.org/protobuf v1.33.0 // indirect
+	gopkg.in/alecthomas/kingpin.v2 v2.2.6 // indirect
+	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c // indirect
+	gopkg.in/errgo.v2 v2.1.0 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+	honnef.co/go/tools v0.1.3 // indirect
+	lukechampine.com/uint128 v1.2.0 // indirect
+	modernc.org/cc/v3 v3.36.3 // indirect
+	modernc.org/ccgo/v3 v3.16.9 // indirect
+	modernc.org/ccorpus v1.11.6 // indirect
+	modernc.org/httpfs v1.0.6 // indirect
+	modernc.org/libc v1.17.1 // indirect
+	modernc.org/mathutil v1.5.0 // indirect
+	modernc.org/memory v1.2.1 // indirect
+	modernc.org/opt v0.1.3 // indirect
+	modernc.org/sqlite v1.18.1 // indirect
+	modernc.org/strutil v1.1.3 // indirect
+	modernc.org/tcl v1.13.1 // indirect
+	modernc.org/token v1.0.0 // indirect
+	modernc.org/z v1.5.1 // indirect
+	rsc.io/binaryregexp v0.2.0 // indirect
+	rsc.io/pdf v0.1.1 // indirect
+	rsc.io/quote/v3 v3.1.0 // indirect
+	rsc.io/sampler v1.3.0 // indirect
+)

prometheus.go

@@ -1,310 +1,541 @@
 package prometheus
 
 import (
-	"context"
 	"fmt"
+	"hash/fnv"
+	"io"
+	"regexp"
 	"sync"
+	"time"
 
-	"github.com/micro/go-micro/v2/client"
-	"github.com/micro/go-micro/v2/logger"
-	"github.com/micro/go-micro/v2/registry"
-	"github.com/micro/go-micro/v2/server"
 	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/collectors"
+	dto "github.com/prometheus/client_model/go"
+	"github.com/prometheus/common/expfmt"
+	"go.unistack.org/micro/v3/meter"
 )
 
-var (
-	// default metric prefix
-	DefaultMetricPrefix = "micro_"
-	// default label prefix
-	DefaultLabelPrefix = "micro_"
+var _ meter.Meter = &prometheusMeter{}
 
-	opsCounter           *prometheus.CounterVec
-	timeCounterSummary   *prometheus.SummaryVec
-	timeCounterHistogram *prometheus.HistogramVec
-
-	mu sync.Mutex
-)
-
-type Options struct {
-	Name    string
-	Version string
-	ID      string
+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
+	sync.Mutex
 }
 
-type Option func(*Options)
+type counters struct {
+	cs map[uint64]*prometheusCounter
+}
 
-func ServiceName(name string) Option {
-	return func(opts *Options) {
-		opts.Name = name
+type gauges struct {
+	cs map[uint64]*prometheusGauge
+}
+
+type histograms struct {
+	cs map[uint64]*prometheusHistogram
+}
+
+type summaries struct {
+	cs map[uint64]*prometheusSummary
+}
+
+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
+}
+
+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),
 	}
 }
 
-func ServiceVersion(version string) Option {
-	return func(opts *Options) {
-		opts.Version = version
+func (m *prometheusMeter) buildMetric(name string, labels ...string) string {
+	if len(m.opts.MetricPrefix) > 0 {
+		name = m.opts.MetricPrefix + name
 	}
+
+	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...)
+
+	if len(m.opts.LabelPrefix) == 0 {
+		return meter.BuildName(name, nlabels...)
+	}
+
+	for idx := 0; idx < nl; idx += 2 {
+		nlabels[idx] = m.opts.LabelPrefix + nlabels[idx]
+	}
+	return meter.BuildName(name, nlabels...)
 }
 
-func ServiceID(id string) Option {
-	return func(opts *Options) {
-		opts.ID = id
+func (m *prometheusMeter) buildName(name string) string {
+	if len(m.opts.MetricPrefix) > 0 {
+		name = m.opts.MetricPrefix + name
 	}
+	return name
 }
 
-func registerMetrics() {
-	mu.Lock()
-	defer mu.Unlock()
-
-	if opsCounter == nil {
-		opsCounter = prometheus.NewCounterVec(
-			prometheus.CounterOpts{
-				Name: fmt.Sprintf("%srequest_total", DefaultMetricPrefix),
-				Help: "Requests processed, partitioned by endpoint and status",
-			},
-			[]string{
-				fmt.Sprintf("%s%s", DefaultLabelPrefix, "name"),
-				fmt.Sprintf("%s%s", DefaultLabelPrefix, "version"),
-				fmt.Sprintf("%s%s", DefaultLabelPrefix, "id"),
-				fmt.Sprintf("%s%s", DefaultLabelPrefix, "endpoint"),
-				fmt.Sprintf("%s%s", DefaultLabelPrefix, "status"),
-			},
-		)
+func (m *prometheusMeter) buildLabels(labels ...string) []string {
+	nl := len(labels)
+	if nl == 0 {
+		return nil
 	}
 
-	if timeCounterSummary == nil {
-		timeCounterSummary = prometheus.NewSummaryVec(
-			prometheus.SummaryOpts{
-				Name: fmt.Sprintf("%slatency_microseconds", DefaultMetricPrefix),
-				Help: "Request latencies in microseconds, partitioned by endpoint",
-			},
-			[]string{
-				fmt.Sprintf("%s%s", DefaultLabelPrefix, "name"),
-				fmt.Sprintf("%s%s", DefaultLabelPrefix, "version"),
-				fmt.Sprintf("%s%s", DefaultLabelPrefix, "id"),
-				fmt.Sprintf("%s%s", DefaultLabelPrefix, "endpoint"),
-			},
-		)
-	}
+	nlabels := make([]string, 0, nl)
 
-	if timeCounterHistogram == nil {
-		timeCounterHistogram = prometheus.NewHistogramVec(
-			prometheus.HistogramOpts{
-				Name: fmt.Sprintf("%srequest_duration_seconds", DefaultMetricPrefix),
-				Help: "Request time in seconds, partitioned by endpoint",
-			},
-			[]string{
-				fmt.Sprintf("%s%s", DefaultLabelPrefix, "name"),
-				fmt.Sprintf("%s%s", DefaultLabelPrefix, "version"),
-				fmt.Sprintf("%s%s", DefaultLabelPrefix, "id"),
-				fmt.Sprintf("%s%s", DefaultLabelPrefix, "endpoint"),
-			},
-		)
+	for idx := 0; idx < nl; idx += 2 {
+		nlabels = append(nlabels, m.opts.LabelPrefix+labels[idx])
+		nlabels = append(nlabels, labels[idx+1])
 	}
-
-	for _, collector := range []prometheus.Collector{opsCounter, timeCounterSummary, timeCounterHistogram} {
-		if err := prometheus.DefaultRegisterer.Register(collector); err != nil {
-			// if already registered, skip fatal
-			if _, ok := err.(prometheus.AlreadyRegisteredError); !ok {
-				logger.Fatal(err)
-			}
-		}
-	}
-
+	return nlabels
 }
 
-type wrapper struct {
-	options  Options
-	callFunc client.CallFunc
-	client.Client
+func (m *prometheusMeter) Name() string {
+	return m.opts.Name
 }
 
-func NewClientWrapper(opts ...Option) client.Wrapper {
-	registerMetrics()
-
-	options := Options{}
-	for _, opt := range opts {
-		opt(&options)
+func (m *prometheusMeter) Counter(name string, labels ...string) meter.Counter {
+	m.Lock()
+	defer m.Unlock()
+	nm := m.buildName(name)
+	labels = m.buildLabels(append(m.opts.Labels, labels...)...)
+	cd, ok := m.counter[nm]
+	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
+		return c
 	}
-
-	return func(c client.Client) client.Client {
-		handler := &wrapper{
-			options: options,
-			Client:  c,
-		}
-
-		return handler
+	c, ok := cd.cs[h]
+	if !ok {
+		c = &prometheusCounter{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: nm}), labels: labels}
+		cd.cs[h] = c
+		m.counter[nm] = cd
 	}
+	return c
 }
 
-func NewCallWrapper(opts ...Option) client.CallWrapper {
-	registerMetrics()
-
-	options := Options{}
-	for _, opt := range opts {
-		opt(&options)
+func (m *prometheusMeter) FloatCounter(name string, labels ...string) meter.FloatCounter {
+	m.Lock()
+	defer m.Unlock()
+	nm := m.buildName(name)
+	labels = m.buildLabels(append(m.opts.Labels, labels...)...)
+	cd, ok := m.floatCounter[nm]
+	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
+		return c
 	}
-
-	return func(fn client.CallFunc) client.CallFunc {
-		handler := &wrapper{
-			options:  options,
-			callFunc: fn,
-		}
-
-		return handler.CallFunc
+	c, ok := cd.cs[h]
+	if !ok {
+		c = &prometheusFloatCounter{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: nm}), labels: labels}
+		cd.cs[h] = c
+		m.floatCounter[nm] = cd
 	}
+	return c
 }
 
-func (w *wrapper) CallFunc(ctx context.Context, node *registry.Node, req client.Request, rsp interface{}, opts client.CallOptions) error {
-	endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Endpoint())
-
-	timer := prometheus.NewTimer(prometheus.ObserverFunc(func(v float64) {
-		us := v * 1000000 // make microseconds
-		timeCounterSummary.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint).Observe(us)
-		timeCounterHistogram.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint).Observe(v)
-	}))
-	defer timer.ObserveDuration()
-
-	err := w.callFunc(ctx, node, req, rsp, opts)
-	if err == nil {
-		opsCounter.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint, "success").Inc()
-	} else {
-		opsCounter.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint, "failure").Inc()
+func (m *prometheusMeter) Gauge(name string, fn func() float64, labels ...string) meter.Gauge {
+	m.Lock()
+	defer m.Unlock()
+	nm := m.buildName(name)
+	labels = m.buildLabels(append(m.opts.Labels, labels...)...)
+	cd, ok := m.gauge[nm]
+	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
+		return c
 	}
-
-	return err
-
+	c, ok := cd.cs[h]
+	if !ok {
+		c = &prometheusGauge{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: nm}), labels: labels}
+		cd.cs[h] = c
+		m.gauge[nm] = cd
+	}
+	return c
 }
 
-func (w *wrapper) Call(ctx context.Context, req client.Request, rsp interface{}, opts ...client.CallOption) error {
-	endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Endpoint())
-
-	timer := prometheus.NewTimer(prometheus.ObserverFunc(func(v float64) {
-		us := v * 1000000 // make microseconds
-		timeCounterSummary.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint).Observe(us)
-		timeCounterHistogram.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint).Observe(v)
-	}))
-	defer timer.ObserveDuration()
-
-	err := w.Client.Call(ctx, req, rsp, opts...)
-	if err == nil {
-		opsCounter.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint, "success").Inc()
-	} else {
-		opsCounter.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint, "failure").Inc()
+func (m *prometheusMeter) Histogram(name string, labels ...string) meter.Histogram {
+	m.Lock()
+	defer m.Unlock()
+	nm := m.buildName(name)
+	labels = m.buildLabels(append(m.opts.Labels, labels...)...)
+	cd, ok := m.histogram[nm]
+	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
+		return c
 	}
-
-	return err
+	c, ok := cd.cs[h]
+	if !ok {
+		c = &prometheusHistogram{c: prometheus.NewHistogram(prometheus.HistogramOpts{Name: nm}), labels: labels}
+		cd.cs[h] = c
+		m.histogram[nm] = cd
+	}
+	return c
 }
 
-func (w *wrapper) Stream(ctx context.Context, req client.Request, opts ...client.CallOption) (client.Stream, error) {
-	endpoint := fmt.Sprintf("%s.%s", req.Service(), req.Endpoint())
-
-	timer := prometheus.NewTimer(prometheus.ObserverFunc(func(v float64) {
-		us := v * 1000000 // make microseconds
-		timeCounterSummary.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint).Observe(us)
-		timeCounterHistogram.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint).Observe(v)
-	}))
-	defer timer.ObserveDuration()
-
-	stream, err := w.Client.Stream(ctx, req, opts...)
-	if err == nil {
-		opsCounter.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint, "success").Inc()
-	} else {
-		opsCounter.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint, "failure").Inc()
+func (m *prometheusMeter) Summary(name string, labels ...string) meter.Summary {
+	m.Lock()
+	defer m.Unlock()
+	nm := m.buildName(name)
+	labels = m.buildLabels(append(m.opts.Labels, labels...)...)
+	cd, ok := m.summary[nm]
+	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
+		return c
 	}
-
-	return stream, err
+	c, ok := cd.cs[h]
+	if !ok {
+		c = &prometheusSummary{c: prometheus.NewSummary(prometheus.SummaryOpts{Name: nm}), labels: labels}
+		cd.cs[h] = c
+		m.summary[nm] = cd
+	}
+	return c
 }
 
-func (w *wrapper) Publish(ctx context.Context, p client.Message, opts ...client.PublishOption) error {
-	endpoint := p.Topic()
-
-	timer := prometheus.NewTimer(prometheus.ObserverFunc(func(v float64) {
-		us := v * 1000000 // make microseconds
-		timeCounterSummary.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint).Observe(us)
-		timeCounterHistogram.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint).Observe(v)
-	}))
-	defer timer.ObserveDuration()
-
-	err := w.Client.Publish(ctx, p, opts...)
-	if err == nil {
-		opsCounter.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint, "success").Inc()
-	} else {
-		opsCounter.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint, "failure").Inc()
+func (m *prometheusMeter) SummaryExt(name string, window time.Duration, quantiles []float64, labels ...string) meter.Summary {
+	m.Lock()
+	defer m.Unlock()
+	nm := m.buildName(name)
+	labels = m.buildLabels(append(m.opts.Labels, labels...)...)
+	cd, ok := m.summary[nm]
+	h := newHash(labels)
+	if !ok {
+		cd = &summaries{cs: make(map[uint64]*prometheusSummary)}
+		c := &prometheusSummary{c: prometheus.NewSummary(prometheus.SummaryOpts{
+			Name:       nm,
+			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
+		return c
 	}
-
-	return err
+	c, ok := cd.cs[h]
+	if !ok {
+		c = &prometheusSummary{c: prometheus.NewSummary(prometheus.SummaryOpts{
+			Name:       nm,
+			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
+	}
+	return c
 }
 
-func NewHandlerWrapper(opts ...Option) server.HandlerWrapper {
-	registerMetrics()
-
-	options := Options{}
-	for _, opt := range opts {
-		opt(&options)
+func (m *prometheusMeter) Init(opts ...meter.Option) error {
+	for _, o := range opts {
+		o(&m.opts)
 	}
-
-	handler := &wrapper{
-		options: options,
-	}
-
-	return handler.HandlerFunc
+	return nil
 }
 
-func (w *wrapper) HandlerFunc(fn server.HandlerFunc) server.HandlerFunc {
-	return func(ctx context.Context, req server.Request, rsp interface{}) error {
-		endpoint := req.Endpoint()
+func (m *prometheusMeter) Write(w io.Writer, opts ...meter.Option) error {
+	options := m.opts
+	for _, o := range opts {
+		o(&options)
+	}
 
-		timer := prometheus.NewTimer(prometheus.ObserverFunc(func(v float64) {
-			us := v * 1000000 // make microseconds
-			timeCounterSummary.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint).Observe(us)
-			timeCounterHistogram.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint).Observe(v)
-		}))
-		defer timer.ObserveDuration()
+	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)
+	}
 
-		err := fn(ctx, req, rsp)
-		if err == nil {
-			opsCounter.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint, "success").Inc()
-		} else {
-			opsCounter.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint, "failure").Inc()
-		}
+	g, ok := m.set.(prometheus.Gatherer)
+	if !ok {
+		return fmt.Errorf("set type %T not prometheus.Gatherer", m.set)
+	}
 
+	mfs, err := g.Gather()
+	if err != nil {
 		return err
 	}
-}
 
-func NewSubscriberWrapper(opts ...Option) server.SubscriberWrapper {
-	registerMetrics()
+	enc := expfmt.NewEncoder(w, expfmt.NewFormat(expfmt.TypeTextPlain))
 
-	options := Options{}
-	for _, opt := range opts {
-		opt(&options)
-	}
-
-	handler := &wrapper{
-		options: options,
-	}
-
-	return handler.SubscriberFunc
-}
-
-func (w *wrapper) SubscriberFunc(fn server.SubscriberFunc) server.SubscriberFunc {
-	return func(ctx context.Context, msg server.Message) error {
-		endpoint := msg.Topic()
-
-		timer := prometheus.NewTimer(prometheus.ObserverFunc(func(v float64) {
-			us := v * 1000000 // make microseconds
-			timeCounterSummary.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint).Observe(us)
-			timeCounterHistogram.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint).Observe(v)
-		}))
-		defer timer.ObserveDuration()
-
-		err := fn(ctx, msg)
-		if err == nil {
-			opsCounter.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint, "success").Inc()
-		} else {
-			opsCounter.WithLabelValues(w.options.Name, w.options.Version, w.options.ID, endpoint, "failure").Inc()
+	for name, metrics := range m.counter {
+		mf := &dto.MetricFamily{
+			Name:   newString(name),
+			Type:   dto.MetricType_GAUGE.Enum(),
+			Metric: make([]*dto.Metric, 0, len(metrics.cs)),
 		}
+		for _, c := range metrics.cs {
+			m := &dto.Metric{}
+			_ = c.c.Write(m)
+			fillMetric(m, c.labels)
+			mf.Metric = append(mf.Metric, m)
+		}
+		mfs = append(mfs, mf)
+	}
 
-		return err
+	for name, metrics := range m.gauge {
+		mf := &dto.MetricFamily{
+			Name:   newString(name),
+			Type:   dto.MetricType_GAUGE.Enum(),
+			Metric: make([]*dto.Metric, 0, len(metrics.cs)),
+		}
+		for _, c := range metrics.cs {
+			m := &dto.Metric{}
+			_ = c.c.Write(m)
+			fillMetric(m, c.labels)
+			mf.Metric = append(mf.Metric, m)
+		}
+		mfs = append(mfs, mf)
+	}
+
+	for name, metrics := range m.floatCounter {
+		mf := &dto.MetricFamily{
+			Name:   newString(name),
+			Type:   dto.MetricType_GAUGE.Enum(),
+			Metric: make([]*dto.Metric, 0, len(metrics.cs)),
+		}
+		for _, c := range metrics.cs {
+			m := &dto.Metric{}
+			_ = c.c.Write(m)
+			fillMetric(m, c.labels)
+			mf.Metric = append(mf.Metric, m)
+		}
+		mfs = append(mfs, mf)
+	}
+
+	for name, metrics := range m.histogram {
+		mf := &dto.MetricFamily{
+			Name:   newString(name),
+			Type:   dto.MetricType_HISTOGRAM.Enum(),
+			Metric: make([]*dto.Metric, 0, len(metrics.cs)),
+		}
+		for _, c := range metrics.cs {
+			m := &dto.Metric{}
+			_ = c.c.Write(m)
+			fillMetric(m, c.labels)
+			mf.Metric = append(mf.Metric, m)
+		}
+		mfs = append(mfs, mf)
+	}
+
+	for name, metrics := range m.summary {
+		mf := &dto.MetricFamily{
+			Name:   newString(name),
+			Type:   dto.MetricType_SUMMARY.Enum(),
+			Metric: make([]*dto.Metric, 0, len(metrics.cs)),
+		}
+		for _, c := range metrics.cs {
+			m := &dto.Metric{}
+			_ = c.c.Write(m)
+			fillMetric(m, c.labels)
+			mf.Metric = append(mf.Metric, m)
+		}
+		mfs = append(mfs, mf)
+	}
+
+	for _, mf := range mfs {
+		_ = enc.Encode(mf)
+	}
+
+	if closer, ok := enc.(io.Closer); ok {
+		_ = closer.Close()
+	}
+
+	return nil
+}
+
+func (m *prometheusMeter) Clone(opts ...meter.Option) meter.Meter {
+	options := m.opts
+	for _, o := range opts {
+		o(&options)
+	}
+
+	return &prometheusMeter{
+		set:          m.set,
+		opts:         options,
+		floatCounter: m.floatCounter,
+		counter:      m.counter,
+		gauge:        m.gauge,
+		histogram:    m.histogram,
+		summary:      m.summary,
 	}
 }
+
+func (m *prometheusMeter) Options() meter.Options {
+	return m.opts
+}
+
+func (m *prometheusMeter) String() string {
+	return "prometheus"
+}
+
+func (m *prometheusMeter) Set(opts ...meter.Option) meter.Meter {
+	nm := &prometheusMeter{opts: m.opts}
+	for _, o := range opts {
+		o(&nm.opts)
+	}
+	nm.set = prometheus.NewRegistry()
+	return nm
+}
+
+type prometheusCounter struct {
+	c      prometheus.Gauge
+	labels []string
+}
+
+func (c *prometheusCounter) Add(n int) {
+	c.c.Add(float64(n))
+}
+
+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:  newString(labels[idx]),
+			Value: newString(labels[idx+1]),
+		})
+		seen[labels[idx]] = true
+	}
+	return m
+}

prometheus_test.go

@@ -1,178 +1,82 @@
-package prometheus_test
+package prometheus
 
 import (
+	"bytes"
 	"context"
-	"fmt"
 	"testing"
 
-	"github.com/micro/go-micro/v2/broker"
-	bmemory "github.com/micro/go-micro/v2/broker/memory"
-	"github.com/micro/go-micro/v2/client"
-	"github.com/micro/go-micro/v2/registry/memory"
-	"github.com/micro/go-micro/v2/router"
-	rrouter "github.com/micro/go-micro/v2/router/registry"
-	"github.com/micro/go-micro/v2/server"
-	promwrapper "github.com/micro/go-plugins/wrapper/monitoring/prometheus/v2"
-	"github.com/prometheus/client_golang/prometheus"
-	dto "github.com/prometheus/client_model/go"
-	"github.com/stretchr/testify/assert"
+	"go.unistack.org/micro/v3/client"
+	"go.unistack.org/micro/v3/codec"
+	"go.unistack.org/micro/v3/meter"
+	"go.unistack.org/micro/v3/meter/wrapper"
 )
 
-type Test interface {
-	Method(ctx context.Context, in *TestRequest, opts ...client.CallOption) (*TestResponse, error)
-}
-
-type TestRequest struct {
-	IsError bool
-}
-type TestResponse struct{}
-
-type testHandler struct{}
-
-func (t *testHandler) Method(ctx context.Context, req *TestRequest, rsp *TestResponse) error {
-	if req.IsError {
-		return fmt.Errorf("test error")
+func TestStd(t *testing.T) {
+	m := NewMeter(meter.WriteProcessMetrics(true), meter.WriteFDMetrics(true))
+	if err := m.Init(); err != nil {
+		t.Fatal(err)
+	}
+	buf := bytes.NewBuffer(nil)
+	_ = m.Write(buf)
+	if !bytes.Contains(buf.Bytes(), []byte(`go_goroutine`)) {
+		t.Fatalf("invalid metrics output: %s", buf.Bytes())
 	}
-	return nil
 }
 
-func TestPrometheusMetrics(t *testing.T) {
-	// setup
-	reg := memory.NewRegistry()
-	brk := bmemory.NewBroker(broker.Registry(reg))
+func TestBuildName(t *testing.T) {
+	m := NewMeter()
+	check := `micro_foo{micro_aaa="b",micro_bar="baz",micro_ccc="d"}`
+	name := m.buildMetric("foo", "bar", "baz", "aaa", "b", "ccc", "d")
+	if name != check {
+		t.Fatalf("metric name error: %s != %s", name, check)
+	}
 
-	name := "test"
-	id := "id-1234567890"
-	version := "1.2.3.4"
+	cnt := m.Counter("counter", "key", "val")
+	cnt.Inc()
+}
 
-	c := client.NewClient(
-		client.Router(rrouter.NewRouter(router.Registry(registry))),
-	)
-	s := server.NewServer(
-		server.Name(name),
-		server.Version(version),
-		server.Id(id),
-		server.Registry(reg),
-		server.Broker(brk),
-		server.WrapHandler(
-			promwrapper.NewHandlerWrapper(
-				promwrapper.ServiceName(name),
-				promwrapper.ServiceVersion(version),
-				promwrapper.ServiceID(id),
-			),
-		),
+func TestWrapper(t *testing.T) {
+	m := NewMeter() // meter.Labels("test_key", "test_val"))
+
+	w := wrapper.NewClientWrapper(
+		wrapper.ServiceName("svc1"),
+		wrapper.ServiceVersion("0.0.1"),
+		wrapper.ServiceID("12345"),
+		wrapper.Meter(m),
 	)
 
-	defer s.Stop()
+	ctx := context.Background()
 
-	type Test struct {
-		*testHandler
+	c := client.NewClient(client.Wrap(w))
+	if err := c.Init(); err != nil {
+		t.Fatal(err)
 	}
-
-	s.Handle(
-		s.NewHandler(&Test{new(testHandler)}),
-	)
-
-	if err := s.Start(); err != nil {
-		t.Fatalf("Unexpected error starting server: %v", 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{micro_endpoint="svc2.Service.Method"} 0`)) {
+		t.Fatalf("invalid metrics output: %s", buf.Bytes())
 	}
-
-	req := c.NewRequest(name, "Test.Method", &TestRequest{IsError: false}, client.WithContentType("application/json"))
-	rsp := TestResponse{}
-
-	assert.NoError(t, c.Call(context.TODO(), req, &rsp))
-
-	req = c.NewRequest(name, "Test.Method", &TestRequest{IsError: true}, client.WithContentType("application/json"))
-	assert.Error(t, c.Call(context.TODO(), req, &rsp))
-
-	list, _ := prometheus.DefaultGatherer.Gather()
-
-	metric := findMetricByName(list, dto.MetricType_SUMMARY, "micro_latency_microseconds")
-
-	if metric == nil || metric.Metric == nil || len(metric.Metric) == 0 {
-		t.Fatalf("no metrics returned")
-	}
-
-	for _, v := range metric.Metric[0].Label {
-		switch *v.Name {
-		case "micro_version":
-			assert.Equal(t, version, *v.Value)
-		case "micro_id":
-			assert.Equal(t, id, *v.Value)
-		case "micro_name":
-			assert.Equal(t, name, *v.Value)
-		case "micro_endpoint":
-			assert.Equal(t, "Test.Method", *v.Value)
-		default:
-			t.Fatalf("unknown %v with %v", *v.Name, *v.Value)
-		}
-	}
-
-	assert.Equal(t, uint64(2), *metric.Metric[0].Summary.SampleCount)
-	assert.True(t, *metric.Metric[0].Summary.SampleSum > 0)
-
-	metric = findMetricByName(list, dto.MetricType_HISTOGRAM, "micro_request_duration_seconds")
-
-	for _, v := range metric.Metric[0].Label {
-		switch *v.Name {
-		case "micro_version":
-			assert.Equal(t, version, *v.Value)
-		case "micro_id":
-			assert.Equal(t, id, *v.Value)
-		case "micro_name":
-			assert.Equal(t, name, *v.Value)
-		case "micro_endpoint":
-			assert.Equal(t, "Test.Method", *v.Value)
-		default:
-			t.Fatalf("unknown %v with %v", *v.Name, *v.Value)
-		}
-	}
-
-	assert.Equal(t, uint64(2), *metric.Metric[0].Histogram.SampleCount)
-	assert.True(t, *metric.Metric[0].Histogram.SampleSum > 0)
-
-	metric = findMetricByName(list, dto.MetricType_COUNTER, "micro_request_total")
-
-	for _, v := range metric.Metric[0].Label {
-		switch *v.Name {
-		case "micro_version":
-			assert.Equal(t, version, *v.Value)
-		case "micro_id":
-			assert.Equal(t, id, *v.Value)
-		case "micro_name":
-			assert.Equal(t, name, *v.Value)
-		case "micro_endpoint":
-			assert.Equal(t, "Test.Method", *v.Value)
-		case "micro_status":
-			assert.Equal(t, "failure", *v.Value)
-		}
-	}
-	assert.Equal(t, *metric.Metric[0].Counter.Value, float64(1))
-
-	for _, v := range metric.Metric[1].Label {
-		switch *v.Name {
-		case "micro_version":
-			assert.Equal(t, version, *v.Value)
-		case "micro_id":
-			assert.Equal(t, id, *v.Value)
-		case "micro_name":
-			assert.Equal(t, name, *v.Value)
-		case "micro_endpoint":
-			assert.Equal(t, "Test.Method", *v.Value)
-		case "micro_status":
-			assert.Equal(t, "success", *v.Value)
-		}
-	}
-
-	assert.Equal(t, *metric.Metric[1].Counter.Value, float64(1))
 }
 
-func findMetricByName(list []*dto.MetricFamily, tp dto.MetricType, name string) *dto.MetricFamily {
-	for _, metric := range list {
-		if *metric.Name == name && *metric.Type == tp {
-			return metric
-		}
-	}
+func TestMultiple(t *testing.T) {
+	m := NewMeter() // meter.Labels("test_key", "test_val"))
 
-	return nil
+	m.Counter("server", "endpoint", "ep1", "path", "/path1").Inc()
+	m.Counter("server", "endpoint", "ep1", "path", "/path1").Inc()
+
+	m.Counter("server", "endpoint", "ep2", "path", "/path2").Inc()
+	m.Counter("server", "endpoint", "ep2", "path", "/path2").Inc()
+
+	m.Counter("server", "endpoint", "ep3", "path", "/path3", "status", "success").Inc()
+
+	buf := bytes.NewBuffer(nil)
+	_ = m.Write(buf, meter.WriteProcessMetrics(false), meter.WriteFDMetrics(false))
+	if !bytes.Contains(buf.Bytes(), []byte(`micro_server{micro_endpoint="ep1",micro_path="/path1"} 2`)) {
+		// t.Fatal("XXXX")
+		t.Fatalf("invalid metrics output: %s", buf.Bytes())
+	}
 }