fixup panics and interface conversations

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>
rewrite to use sync.Map
2024-04-15 00:34:55 +03:00 · 2024-04-15 00:27:15 +03:00 · 2024-04-04 16:36:48 +03:00 · 2024-03-27 11:49:31 +03:00 · 2023-04-13 20:01:33 +03:00 · 2023-04-13 20:01:15 +03:00
10 changed files with 1663 additions and 158 deletions
--- a/.github/workflows/autoapprove.yml
+++ b/.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: ${{ secrets.GITHUB_TOKEN }}
--- a/.github/workflows/automerge.yml
+++ b/.github/workflows/automerge.yml
@@ -0,0 +1,21 @@
+name: "automerge"
+
+on:
+  pull_request_target:
+    types: [assigned, opened, synchronize, reopened]
+
+permissions:
+  pull-requests: write
+  contents: write
+
+jobs:
+  automerge:
+    runs-on: ubuntu-latest
+    if: github.actor == 'vtolstov'
+    steps:
+      - name: merge
+        id: merge
+        run: gh pr merge --auto --merge "$PR_URL"
+        env:
+          PR_URL: ${{github.event.pull_request.html_url}}
+          GITHUB_TOKEN: ${{secrets.TOKEN}}
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -3,19 +3,20 @@ on:
 push:
    branches:
    - master
+    - v3
 jobs:
  test:
    name: test
    runs-on: ubuntu-latest
    steps:
    - name: setup
-      uses: actions/setup-go@v2
+      uses: actions/setup-go@v3
      with:
-        go-version: 1.16
+        go-version: 1.17
    - name: checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
    - name: cache
-      uses: actions/cache@v2
+      uses: actions/cache@v3
      with:
        path: ~/go/pkg/mod
        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
@@ -31,9 +32,9 @@ jobs:
    runs-on: ubuntu-latest
    steps:
      - name: checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
      - name: lint
-        uses: golangci/golangci-lint-action@v2
+        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.
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -43,14 +43,14 @@ jobs:

    steps:
    - name: checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
    - name: setup
-      uses: actions/setup-go@v2
+      uses: actions/setup-go@v3
      with:
-        go-version: 1.16
+        go-version: 1.17
    # Initializes the CodeQL tools for scanning.
    - name: init
-      uses: github/codeql-action/init@v1
+      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.
@@ -61,7 +61,7 @@ jobs:
    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
    # If this step fails, then you should remove it and run the build manually (see below)
    - name: autobuild
-      uses: github/codeql-action/autobuild@v1
+      uses: github/codeql-action/autobuild@v2

    # ℹ️ Command-line programs to run using the OS shell.
    # 📚 https://git.io/JvXDl
@@ -75,4 +75,4 @@ jobs:
    #   make release

    - name: analyze
-      uses: github/codeql-action/analyze@v1
+      uses: github/codeql-action/analyze@v2
--- a/.github/workflows/dependabot-automerge.yml
+++ b/.github/workflows/dependabot-automerge.yml
@@ -1,4 +1,4 @@
-name: "prautomerge"
+name: "dependabot-automerge"

 on:
  pull_request_target:
@@ -9,21 +9,17 @@ permissions:
  contents: write

 jobs:
-  dependabot:
+  automerge:
    runs-on: ubuntu-latest
-    if: ${{ github.actor == 'dependabot[bot]' }}
+    if: github.actor == 'dependabot[bot]'
    steps:
      - name: metadata
        id: metadata
-        uses: dependabot/fetch-metadata@v1.1.1
+        uses: dependabot/fetch-metadata@v1.3.6
        with:
          github-token: "${{ secrets.TOKEN }}"
-      - name: approve
-        run: gh pr review --approve "$PR_URL"
-        env:
-          PR_URL: ${{github.event.pull_request.html_url}}
-          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:
--- a/.github/workflows/pr.yml
+++ b/.github/workflows/pr.yml
@@ -3,19 +3,20 @@ on:
  pull_request:
    branches:
    - master
+    - v3
 jobs:
  test:
    name: test
    runs-on: ubuntu-latest
    steps:
    - name: setup
-      uses: actions/setup-go@v2
+      uses: actions/setup-go@v3
      with:
-        go-version: 1.16
+        go-version: 1.17
    - name: checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
    - name: cache
-      uses: actions/cache@v2
+      uses: actions/cache@v3
      with:
        path: ~/go/pkg/mod
        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
@@ -31,9 +32,9 @@ jobs:
    runs-on: ubuntu-latest
    steps:
      - name: checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
      - name: lint
-        uses: golangci/golangci-lint-action@v2
+        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.
--- a/go.mod
+++ b/go.mod
@@ -1,10 +1,324 @@
 module go.unistack.org/micro-meter-prometheus/v3

-go 1.16
+go 1.21
+
+toolchain go1.22.0

 require (
-	github.com/prometheus/client_golang v1.11.0
-	github.com/prometheus/client_model v0.2.0
-	github.com/prometheus/common v0.26.0
-	go.unistack.org/micro/v3 v3.8.7
+	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
+)
+
+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
 )
--- a/go.sum
+++ b/go.sum
--- a/prometheus.go
+++ b/prometheus.go
@@ -2,7 +2,9 @@ package prometheus

 import (
 	"fmt"
+	"hash/fnv"
 	"io"
+	"regexp"
 	"sync"
 	"time"

@@ -13,26 +15,58 @@ import (
 	"go.unistack.org/micro/v3/meter"
 )

+var _ meter.Meter = &prometheusMeter{}
+
 type prometheusMeter struct {
 	opts         meter.Options
 	set          prometheus.Registerer
-	counter      map[string]prometheusCounter
-	floatCounter map[string]prometheusFloatCounter
-	gauge        map[string]prometheusGauge
-	histogram    map[string]prometheusHistogram
-	summary      map[string]prometheusSummary
+	counter      *sync.Map
+	floatCounter *sync.Map
+	gauge        *sync.Map
+	histogram    *sync.Map
+	summary      *sync.Map
 	sync.Mutex
 }

-func NewMeter(opts ...meter.Option) meter.Meter {
+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 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.DefaultRegisterer,
+		set:          prometheus.NewRegistry(), // prometheus.DefaultRegisterer,
 		opts:         meter.NewOptions(opts...),
-		counter:      make(map[string]prometheusCounter),
-		floatCounter: make(map[string]prometheusFloatCounter),
-		gauge:        make(map[string]prometheusGauge),
-		histogram:    make(map[string]prometheusHistogram),
-		summary:      make(map[string]prometheusSummary),
+		counter:      &sync.Map{},
+		floatCounter: &sync.Map{},
+		gauge:        &sync.Map{},
+		histogram:    &sync.Map{},
+		summary:      &sync.Map{},
 	}
 }

@@ -54,9 +88,8 @@ func (m *prometheusMeter) buildMetric(name string, labels ...string) string {
 		return meter.BuildName(name, nlabels...)
 	}

-	for idx := 0; idx < nl; idx++ {
+	for idx := 0; idx < nl; idx += 2 {
 		nlabels[idx] = m.opts.LabelPrefix + nlabels[idx]
-		idx++
 	}
 	return meter.BuildName(name, nlabels...)
 }
@@ -69,18 +102,16 @@ func (m *prometheusMeter) buildName(name string) string {
 }

 func (m *prometheusMeter) buildLabels(labels ...string) []string {
-	nl := len(m.opts.Labels) + len(labels)
+	nl := len(labels)
 	if nl == 0 {
 		return nil
 	}

 	nlabels := make([]string, 0, nl)
-	nlabels = append(nlabels, m.opts.Labels...)
-	nlabels = append(nlabels, labels...)

-	for idx := 0; idx < nl; idx++ {
-		nlabels[idx] = m.opts.LabelPrefix + nlabels[idx]
-		idx++
+	for idx := 0; idx < nl; idx += 2 {
+		nlabels = append(nlabels, m.opts.LabelPrefix+labels[idx])
+		nlabels = append(nlabels, labels[idx+1])
 	}
 	return nlabels
 }
@@ -89,114 +120,167 @@ func (m *prometheusMeter) Name() string {
 	return m.opts.Name
 }

-func (m *prometheusMeter) mapLabels(labels ...string) map[string]string {
-	labels = m.buildLabels(labels...)
-	elementMap := make(map[string]string, len(labels)/2)
-	for idx := 0; idx < len(labels); idx++ {
-		elementMap[labels[idx]] = labels[idx+1]
-		idx++
-	}
-	return elementMap
-}
-
 func (m *prometheusMeter) Counter(name string, labels ...string) meter.Counter {
 	m.Lock()
 	defer m.Unlock()
-
-	nm := m.buildMetric(name, labels...)
-	c, ok := m.counter[nm]
+	nm := m.buildName(name)
+	labels = m.buildLabels(append(m.opts.Labels, labels...)...) // TODO: Read prometheus.go:128
+	vcd, ok := m.counter.Load(nm)
+	h := newHash(labels)
 	if !ok {
-		nc := prometheus.NewGauge(prometheus.GaugeOpts{Name: m.buildName(name), ConstLabels: m.mapLabels(labels...)})
-		m.set.MustRegister(nc)
-		c = prometheusCounter{c: nc}
-		m.counter[nm] = c
+		cd := &counters{cs: &sync.Map{}}
+		c := &prometheusCounter{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: nm}), labels: labels}
+		cd.cs.Store(h, c)
+		m.counter.Store(nm, cd)
+		return c
 	}
-
+	cd := vcd.(*counters)
+	vc, ok := cd.cs.Load(h)
+	if !ok {
+		c := &prometheusCounter{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: nm}), labels: labels}
+		cd.cs.Store(h, c)
+		m.counter.Store(nm, cd)
+		return c
+	}
+	c := vc.(*prometheusCounter)
 	return c
 }

 func (m *prometheusMeter) FloatCounter(name string, labels ...string) meter.FloatCounter {
 	m.Lock()
 	defer m.Unlock()
-
-	nm := m.buildMetric(name, labels...)
-	c, ok := m.floatCounter[nm]
+	nm := m.buildName(name)
+	labels = m.buildLabels(append(m.opts.Labels, labels...)...)
+	vcd, ok := m.floatCounter.Load(nm)
+	h := newHash(labels)
 	if !ok {
-		nc := prometheus.NewGauge(prometheus.GaugeOpts{Name: m.buildName(name), ConstLabels: m.mapLabels(labels...)})
-		m.set.MustRegister(nc)
-		c = prometheusFloatCounter{c: nc}
-		m.floatCounter[nm] = c
+		cd := &floatCounters{cs: &sync.Map{}}
+		c := &prometheusFloatCounter{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: nm}), labels: labels}
+		cd.cs.Store(h, c)
+		m.floatCounter.Store(nm, cd)
+		return c
 	}
-
+	cd := vcd.(*floatCounters)
+	vc, ok := cd.cs.Load(h)
+	if !ok {
+		c := &prometheusFloatCounter{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: nm}), labels: labels}
+		cd.cs.Store(h, c)
+		m.floatCounter.Store(nm, cd)
+		return c
+	}
+	c := vc.(*prometheusFloatCounter)
 	return c
 }

 func (m *prometheusMeter) Gauge(name string, fn func() float64, labels ...string) meter.Gauge {
 	m.Lock()
 	defer m.Unlock()
-
-	nm := m.buildMetric(name, labels...)
-	c, ok := m.gauge[nm]
+	nm := m.buildName(name)
+	labels = m.buildLabels(append(m.opts.Labels, labels...)...)
+	vcd, ok := m.gauge.Load(nm)
+	h := newHash(labels)
 	if !ok {
-		nc := prometheus.NewGauge(prometheus.GaugeOpts{Name: m.buildName(name), ConstLabels: m.mapLabels(labels...)})
-		m.set.MustRegister(nc)
-		c = prometheusGauge{c: nc}
-		m.gauge[nm] = c
+		cd := &gauges{cs: &sync.Map{}}
+		c := &prometheusGauge{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: nm}), labels: labels}
+		cd.cs.Store(h, c)
+		m.gauge.Store(nm, cd)
+		return c
 	}
-
+	cd := vcd.(*gauges)
+	vc, ok := cd.cs.Load(h)
+	if !ok {
+		c := &prometheusGauge{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: nm}), labels: labels}
+		cd.cs.Store(h, c)
+		m.gauge.Store(nm, cd)
+		return c
+	}
+	c := vc.(*prometheusGauge)
 	return c
 }

 func (m *prometheusMeter) Histogram(name string, labels ...string) meter.Histogram {
 	m.Lock()
 	defer m.Unlock()
-
-	nm := m.buildMetric(name, labels...)
-	c, ok := m.histogram[nm]
+	nm := m.buildName(name)
+	labels = m.buildLabels(append(m.opts.Labels, labels...)...)
+	vcd, ok := m.histogram.Load(nm)
+	h := newHash(labels)
 	if !ok {
-		nc := prometheus.NewHistogram(prometheus.HistogramOpts{Name: m.buildName(name), ConstLabels: m.mapLabels(labels...)})
-		m.set.MustRegister(nc)
-		c = prometheusHistogram{c: nc}
-		m.histogram[nm] = c
+		cd := &histograms{cs: &sync.Map{}}
+		c := &prometheusHistogram{c: prometheus.NewHistogram(prometheus.HistogramOpts{Name: nm}), labels: labels}
+		cd.cs.Store(h, c)
+		m.histogram.Store(nm, cd)
+		return c
 	}
-
+	cd := vcd.(*histograms)
+	vc, ok := cd.cs.Load(h)
+	if !ok {
+		c := &prometheusHistogram{c: prometheus.NewHistogram(prometheus.HistogramOpts{Name: nm}), labels: labels}
+		cd.cs.Store(h, c)
+		m.histogram.Store(nm, cd)
+		return c
+	}
+	c := vc.(*prometheusHistogram)
 	return c
 }

 func (m *prometheusMeter) Summary(name string, labels ...string) meter.Summary {
 	m.Lock()
 	defer m.Unlock()
-
-	nm := m.buildMetric(name, labels...)
-	c, ok := m.summary[nm]
+	nm := m.buildName(name)
+	labels = m.buildLabels(append(m.opts.Labels, labels...)...)
+	vcd, ok := m.summary.Load(nm)
+	h := newHash(labels)
 	if !ok {
-		nc := prometheus.NewSummary(prometheus.SummaryOpts{Name: m.buildName(name), ConstLabels: m.mapLabels(labels...)})
-		m.set.MustRegister(nc)
-		c = prometheusSummary{c: nc}
-		m.summary[nm] = c
+		cd := &summaries{cs: &sync.Map{}}
+		c := &prometheusSummary{c: prometheus.NewSummary(prometheus.SummaryOpts{Name: nm}), labels: labels}
+		cd.cs.Store(h, c)
+		m.summary.Store(nm, cd)
+		return c
 	}
-
+	cd := vcd.(*summaries)
+	vc, ok := cd.cs.Load(h)
+	if !ok {
+		c := &prometheusSummary{c: prometheus.NewSummary(prometheus.SummaryOpts{Name: nm}), labels: labels}
+		cd.cs.Store(h, c)
+		m.summary.Store(nm, cd)
+		return c
+	}
+	c := vc.(*prometheusSummary)
 	return c
 }

 func (m *prometheusMeter) SummaryExt(name string, window time.Duration, quantiles []float64, labels ...string) meter.Summary {
 	m.Lock()
 	defer m.Unlock()
-
-	nm := m.buildMetric(name, labels...)
-	c, ok := m.summary[nm]
+	nm := m.buildName(name)
+	labels = m.buildLabels(append(m.opts.Labels, labels...)...)
+	vcd, ok := m.summary.Load(nm)
+	h := newHash(labels)
 	if !ok {
-		nc := prometheus.NewSummary(prometheus.SummaryOpts{
-			Name:        m.buildName(name),
-			ConstLabels: m.mapLabels(labels...),
-			MaxAge:      window,
-			Objectives:  map[float64]float64{0.5: 0.05, 0.9: 0.01, 0.99: 0.001},
-		})
-		m.set.MustRegister(nc)
-		c = prometheusSummary{c: nc}
-		m.summary[nm] = c
+		cd := &summaries{cs: &sync.Map{}}
+		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.Store(h, c)
+		m.summary.Store(nm, cd)
+		return c
 	}
-
+	cd := vcd.(*summaries)
+	vc, ok := cd.cs.Load(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.Store(h, c)
+		m.summary.Store(nm, cd)
+		return c
+	}
+	c := vc.(*prometheusSummary)
 	return c
 }

@@ -204,7 +288,6 @@ func (m *prometheusMeter) Init(opts ...meter.Option) error {
 	for _, o := range opts {
 		o(&m.opts)
 	}
-
 	return nil
 }

@@ -215,8 +298,10 @@ func (m *prometheusMeter) Write(w io.Writer, opts ...meter.Option) error {
 	}

 	if options.WriteProcessMetrics || options.WriteFDMetrics {
-		c := collectors.NewProcessCollector(collectors.ProcessCollectorOpts{})
-		_ = m.set.Register(c)
+		pc := collectors.NewProcessCollector(collectors.ProcessCollectorOpts{})
+		_ = m.set.Register(pc)
+		gc := collectors.NewGoCollector(collectors.WithGoCollectorRuntimeMetrics(collectors.GoRuntimeMetricsRule{Matcher: regexp.MustCompile("/.*")}))
+		_ = m.set.Register(gc)
 	}

 	g, ok := m.set.(prometheus.Gatherer)
@@ -229,7 +314,98 @@ func (m *prometheusMeter) Write(w io.Writer, opts ...meter.Option) error {
 		return err
 	}

-	enc := expfmt.NewEncoder(w, expfmt.FmtText)
+	enc := expfmt.NewEncoder(w, expfmt.NewFormat(expfmt.TypeTextPlain))
+
+	m.counter.Range(func(k, v any) bool {
+		name := k.(string)
+		mf := &dto.MetricFamily{
+			Name: newString(name),
+			Type: dto.MetricType_GAUGE.Enum(),
+		}
+		v.(*counters).cs.Range(func(_, nv any) bool {
+			c := nv.(*prometheusCounter)
+			m := &dto.Metric{}
+			_ = c.c.Write(m)
+			fillMetric(m, c.labels)
+			mf.Metric = append(mf.Metric, m)
+			return true
+		})
+		mfs = append(mfs, mf)
+		return true
+	})
+
+	m.gauge.Range(func(k, v any) bool {
+		name := k.(string)
+		mf := &dto.MetricFamily{
+			Name: newString(name),
+			Type: dto.MetricType_GAUGE.Enum(),
+		}
+		v.(*gauges).cs.Range(func(_, nv any) bool {
+			c := nv.(*prometheusGauge)
+			m := &dto.Metric{}
+			_ = c.c.Write(m)
+			fillMetric(m, c.labels)
+			mf.Metric = append(mf.Metric, m)
+			return true
+		})
+		mfs = append(mfs, mf)
+		return true
+	})
+
+	m.floatCounter.Range(func(k, v any) bool {
+		name := k.(string)
+		mf := &dto.MetricFamily{
+			Name: newString(name),
+			Type: dto.MetricType_GAUGE.Enum(),
+		}
+		v.(*floatCounters).cs.Range(func(_, nv any) bool {
+			c := nv.(*prometheusGauge)
+			m := &dto.Metric{}
+			_ = c.c.Write(m)
+			fillMetric(m, c.labels)
+			mf.Metric = append(mf.Metric, m)
+			return true
+		})
+		mfs = append(mfs, mf)
+		return true
+	})
+
+	m.histogram.Range(func(k, v any) bool {
+		name := k.(string)
+		mf := &dto.MetricFamily{
+			Name: newString(name),
+			Type: dto.MetricType_HISTOGRAM.Enum(),
+		}
+		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 {
+		name := k.(string)
+		mf := &dto.MetricFamily{
+			Name: newString(name),
+			Type: dto.MetricType_SUMMARY.Enum(),
+		}
+		v.(*summaries).cs.Range(func(_, nv any) bool {
+			c := nv.(*prometheusSummary)
+			m := &dto.Metric{}
+			_ = c.c.Write(m)
+			fillMetric(m, c.labels)
+			mf.Metric = append(mf.Metric, m)
+			return true
+		})
+		mfs = append(mfs, mf)
+		return true
+	})
+
 	for _, mf := range mfs {
 		_ = enc.Encode(mf)
 	}
@@ -248,12 +424,13 @@ func (m *prometheusMeter) Clone(opts ...meter.Option) meter.Meter {
 	}

 	return &prometheusMeter{
-		set:       m.set,
-		opts:      options,
-		counter:   m.counter,
-		gauge:     m.gauge,
-		histogram: m.histogram,
-		summary:   m.summary,
+		set:          m.set,
+		opts:         options,
+		floatCounter: m.floatCounter,
+		counter:      m.counter,
+		gauge:        m.gauge,
+		histogram:    m.histogram,
+		summary:      m.summary,
 	}
 }

@@ -275,22 +452,23 @@ func (m *prometheusMeter) Set(opts ...meter.Option) meter.Meter {
 }

 type prometheusCounter struct {
-	c prometheus.Gauge
+	c      prometheus.Gauge
+	labels []string
 }

-func (c prometheusCounter) Add(n int) {
+func (c *prometheusCounter) Add(n int) {
 	c.c.Add(float64(n))
 }

-func (c prometheusCounter) Dec() {
+func (c *prometheusCounter) Dec() {
 	c.c.Dec()
 }

-func (c prometheusCounter) Inc() {
+func (c *prometheusCounter) Inc() {
 	c.c.Inc()
 }

-func (c prometheusCounter) Get() uint64 {
+func (c *prometheusCounter) Get() uint64 {
 	m := &dto.Metric{}
 	if err := c.c.Write(m); err != nil {
 		return 0
@@ -298,12 +476,13 @@ func (c prometheusCounter) Get() uint64 {
 	return uint64(m.GetGauge().GetValue())
 }

-func (c prometheusCounter) Set(n uint64) {
+func (c *prometheusCounter) Set(n uint64) {
 	c.c.Set(float64(n))
 }

 type prometheusFloatCounter struct {
-	c prometheus.Gauge
+	c      prometheus.Gauge
+	labels []string
 }

 func (c prometheusFloatCounter) Add(n float64) {
@@ -327,7 +506,8 @@ func (c prometheusFloatCounter) Sub(n float64) {
 }

 type prometheusGauge struct {
-	c prometheus.Gauge
+	c      prometheus.Gauge
+	labels []string
 }

 func (c prometheusGauge) Get() float64 {
@@ -339,7 +519,8 @@ func (c prometheusGauge) Get() float64 {
 }

 type prometheusHistogram struct {
-	c prometheus.Histogram
+	c      prometheus.Histogram
+	labels []string
 }

 func (c prometheusHistogram) Reset() {
@@ -354,7 +535,8 @@ func (c prometheusHistogram) UpdateDuration(n time.Time) {
 }

 type prometheusSummary struct {
-	c prometheus.Summary
+	c      prometheus.Summary
+	labels []string
 }

 func (c prometheusSummary) Update(n float64) {
@@ -364,3 +546,29 @@ func (c prometheusSummary) Update(n float64) {
 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
+}
--- a/prometheus_test.go
+++ b/prometheus_test.go
@@ -11,11 +11,22 @@ import (
 	"go.unistack.org/micro/v3/meter/wrapper"
 )

+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())
+	}
+}
+
 func TestBuildName(t *testing.T) {
 	m := NewMeter()
-	im := m.(*prometheusMeter)
 	check := `micro_foo{micro_aaa="b",micro_bar="baz",micro_ccc="d"}`
-	name := im.buildMetric("foo", "bar", "baz", "aaa", "b", "ccc", "d")
+	name := m.buildMetric("foo", "bar", "baz", "aaa", "b", "ccc", "d")
 	if name != check {
 		t.Fatalf("metric name error: %s != %s", name, check)
 	}
@@ -50,3 +61,22 @@ func TestWrapper(t *testing.T) {
 		t.Fatalf("invalid metrics output: %s", buf.Bytes())
 	}
 }
+
+func TestMultiple(t *testing.T) {
+	m := NewMeter() // meter.Labels("test_key", "test_val"))
+
+	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())
+	}
+}