Merge pull request #52 from unistack-org/rewrite

rewrite prometheus meter

.github/workflows/autoapprove.yml

@@ -0,0 +1,20 @@
+name: "autoapprove"
+
+on:
+  pull_request_target:
+    types: [assigned, opened, synchronize, reopened]
+
+permissions:
+  pull-requests: write
+  contents: write
+
+jobs:
+  autoapprove:
+    runs-on: ubuntu-latest
+    steps:
+      - name: approve
+        uses: hmarr/auto-approve-action@v2
+        if: github.actor == 'vtolstov' || github.actor == 'dependabot[bot]'
+        id: approve
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/automerge.yml

@@ -0,0 +1,21 @@
+name: "automerge"
+
+on:
+  pull_request_target:
+    types: [assigned, opened, synchronize, reopened]
+
+permissions:
+  pull-requests: write
+  contents: write
+
+jobs:
+  automerge:
+    runs-on: ubuntu-latest
+    if: github.actor == 'vtolstov'
+    steps:
+      - name: merge
+        id: merge
+        run: gh pr merge --auto --merge "$PR_URL"
+        env:
+          PR_URL: ${{github.event.pull_request.html_url}}
+          GITHUB_TOKEN: ${{secrets.TOKEN}}

.github/workflows/build.yml

@@ -3,6 +3,7 @@ on:
  push:
     branches:
     - master
+    - v3
 jobs:
   test:
     name: test
@@ -11,9 +12,9 @@ jobs:
     - name: setup
       uses: actions/setup-go@v2
       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
       with:
@@ -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@v3.1.0
         continue-on-error: true
         with:
           # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.

.github/workflows/codeql-analysis.yml

@@ -43,11 +43,11 @@ jobs:
 
     steps:
     - name: checkout
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
     - name: setup
       uses: actions/setup-go@v2
       with:
-        go-version: 1.16
+        go-version: 1.17
     # Initializes the CodeQL tools for scanning.
     - name: init
       uses: github/codeql-action/init@v1

.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: ${{ github.actor == 'dependabot[bot]' }}
+    if: github.actor == 'dependabot[bot]'
     steps:
       - name: metadata
         id: metadata
-        uses: dependabot/fetch-metadata@v1.1.1
+        uses: dependabot/fetch-metadata@v1.3.0
         with:
           github-token: "${{ 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:

.github/workflows/pr.yml

@@ -3,6 +3,7 @@ on:
   pull_request:
     branches:
     - master
+    - v3
 jobs:
   test:
     name: test
@@ -11,9 +12,9 @@ jobs:
     - name: setup
       uses: actions/setup-go@v2
       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
       with:
@@ -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@v3.1.0
         continue-on-error: true
         with:
           # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.

go.mod

@@ -3,8 +3,8 @@ module go.unistack.org/micro-meter-prometheus/v3
 go 1.16
 
 require (
-	github.com/prometheus/client_golang v1.12.0
+	github.com/prometheus/client_golang v1.12.1
 	github.com/prometheus/client_model v0.2.0
 	github.com/prometheus/common v0.32.1
-	go.unistack.org/micro/v3 v3.8.16
+	go.unistack.org/micro/v3 v3.8.21
 )

go.sum

@@ -33,16 +33,21 @@ cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
+github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
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 github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
 github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d/go.mod h1:rBZYJk541a8SKzHPHnH3zbiI+7dagKZ0cgpgrD7Fyho=
+github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
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+github.com/buger/jsonparser v1.1.1/go.mod h1:6RYKKt7H4d4+iWqouImQ9R2FZql3VbhNgx27UK13J/0=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
+github.com/cespare/xxhash v1.1.0 h1:a6HrQnmkObjyL+Gs60czilIUGqrzKutQD6XZog3p+ko=
+github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
 github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
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@@ -51,13 +56,20 @@ github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5P
 github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
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+github.com/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
+github.com/cncf/xds/go v0.0.0-20210312221358-fbca930ec8ed/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
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+github.com/docopt/docopt-go v0.0.0-20180111231733-ee0de3bc6815/go.mod h1:WwZ+bS3ebgob9U8Nd0kOddGdZWjyMGR8Wziv+TBNwSE=
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+github.com/envoyproxy/go-control-plane v0.9.9-0.20210512163311-63b5d3c536b0/go.mod h1:hliV/p42l8fGbc6Y9bQ70uLwIvmJyVE5k4iMKlh8wCQ=
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+github.com/flowstack/go-jsonschema v0.1.1/go.mod h1:yL7fNggx1o8rm9RlgXv7hTBWxdBM0rVwpMwimd3F3N0=
+github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
 github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1/go.mod h1:vR7hzQXu2zJy9AVAgeJqvqgH9Q5CA+iKCZ2gyEVpxRU=
 github.com/go-gl/glfw/v3.3/glfw v0.0.0-20191125211704-12ad95a8df72/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
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@@ -100,6 +112,7 @@ github.com/golang/protobuf v1.5.2 h1:ROPKBNFfQgOUMifHyP+KYbvpjbdoFNs+aK7DXlji0Tw
 github.com/golang/protobuf v1.5.2/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
 github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
 github.com/google/btree v1.0.0/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
+github.com/google/gnostic v0.6.6/go.mod h1:Nm8234We1lq6iB9OmlgNv3nH91XLLVZHCDayfA3xq+E=
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@@ -121,8 +134,10 @@ github.com/google/pprof v0.0.0-20200229191704-1ebb73c60ed3/go.mod h1:ZgVRPoUq/hf
 github.com/google/pprof v0.0.0-20200430221834-fc25d7d30c6d/go.mod h1:ZgVRPoUq/hfqzAqh7sHMqb3I9Rq5C59dIz2SbBwJ4eM=
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+github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
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+github.com/grpc-ecosystem/grpc-gateway v1.16.0/go.mod h1:BDjrQk3hbvj6Nolgz8mAMFbcEtjT1g+wF4CSlocrBnw=
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@@ -141,6 +156,7 @@ github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxv
 github.com/konsorten/go-windows-terminal-sequences v1.0.3/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
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 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
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@@ -162,8 +178,8 @@ github.com/prometheus/client_golang v0.9.1/go.mod h1:7SWBe2y4D6OKWSNQJUaRYU/AaXP
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-github.com/prometheus/client_golang v1.12.0 h1:C+UIj/QWtmqY13Arb8kwMt5j34/0Z2iKamrJ+ryC0Gg=
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-github.com/prometheus/client_golang v1.12.0/go.mod h1:3Z9XVyYiZYEO+YQWt3RD2R3jrbd179Rt297l4aS6nDY=
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@@ -180,16 +196,23 @@ github.com/prometheus/procfs v0.1.3/go.mod h1:lV6e/gmhEcM9IjHGsFOCxxuZ+z1YqCvr4O
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 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
+github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
+github.com/xeipuuv/gojsonpointer v0.0.0-20180127040702-4e3ac2762d5f/go.mod h1:N2zxlSyiKSe5eX1tZViRH5QA0qijqEDrYZiPEAiq3wU=
+github.com/xeipuuv/gojsonreference v0.0.0-20180127040603-bd5ef7bd5415/go.mod h1:GwrjFmJcFw6At/Gs6z4yjiIwzuJ1/+UwLxMQDVQXShQ=
+github.com/xeipuuv/gojsonschema v1.2.0/go.mod h1:anYRn/JVcOK2ZgGU+IjEV4nwlhoK5sQluxsYJ78Id3Y=
 github.com/yuin/goldmark v1.1.25/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.1.32/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
@@ -198,10 +221,11 @@ go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8=
 go.opencensus.io v0.22.2/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.3/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.4/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
-go.unistack.org/micro-proto/v3 v3.1.1 h1:78qRmltwGek5kSQ9tNmDZ9TCRvZM7YDIOgzriKvabjA=
+go.opentelemetry.io/proto/otlp v0.7.0/go.mod h1:PqfVotwruBrMGOCsRd/89rSnXhoiJIqeYNgFYFoEGnI=
-go.unistack.org/micro-proto/v3 v3.1.1/go.mod h1:DpRhYCBXlmSJ/AAXTmntvlh7kQkYU6eFvlmYAx4BQS8=
+go.unistack.org/micro-proto/v3 v3.2.1 h1:z7+V97LcAwMbBiYStmf8b6fFk2UPJTzni+rxNqk4NrI=
-go.unistack.org/micro/v3 v3.8.16 h1:wBED4qWYVXme1CyT1jDqVNNSBFuFoxM+kVUDXqeQpIg=
+go.unistack.org/micro-proto/v3 v3.2.1/go.mod h1:ZltVWNECD5yK+40+OCONzGw4OtmSdTpVi8/KFgo9dqM=
-go.unistack.org/micro/v3 v3.8.16/go.mod h1:zEbgew93bFhU+gANJubbbnPP1LtDTQRbM/17QXTbTrY=
+go.unistack.org/micro/v3 v3.8.21 h1:8vYxtIlPnCBZ888BrQSP6+b0CFQcn5FiaqDpI5XqorQ=
+go.unistack.org/micro/v3 v3.8.21/go.mod h1:aBOCQ6SkAwKMRI7Q1CIsQA2S88ibyJfweJZlT1M2qpE=
 golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
@@ -266,7 +290,9 @@ golang.org/x/net v0.0.0-20200520182314-0ba52f642ac2/go.mod h1:qpuaurCH72eLCgpAm/
 golang.org/x/net v0.0.0-20200625001655-4c5254603344/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20200707034311-ab3426394381/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
+golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4/go.mod h1:p54w0d4576C0XHj96bSt6lcn1PtDYWL6XObtHCRCNQM=
 golang.org/x/net v0.0.0-20210525063256-abc453219eb5/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
+golang.org/x/net v0.0.0-20210805182204-aaa1db679c0d/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.0.0-20210928044308-7d9f5e0b762b/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
@@ -316,7 +342,9 @@ golang.org/x/sys v0.0.0-20200625212154-ddb9806d33ae/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20200803210538-64077c9b5642/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210330210617-4fbd30eecc44/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210603081109-ebe580a85c40/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220114195835-da31bd327af9 h1:XfKQ4OlFl8okEOr5UvAqFRVj8pY/4yfcXrddB8qAbU0=
 golang.org/x/sys v0.0.0-20220114195835-da31bd327af9/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
@@ -326,6 +354,7 @@ golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
+golang.org/x/text v0.3.5/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
 golang.org/x/time v0.0.0-20190308202827-9d24e82272b4/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
@@ -420,12 +449,14 @@ google.golang.org/genproto v0.0.0-20200312145019-da6875a35672/go.mod h1:55QSHmfG
 google.golang.org/genproto v0.0.0-20200331122359-1ee6d9798940/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
 google.golang.org/genproto v0.0.0-20200430143042-b979b6f78d84/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
 google.golang.org/genproto v0.0.0-20200511104702-f5ebc3bea380/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
+google.golang.org/genproto v0.0.0-20200513103714-09dca8ec2884/go.mod h1:55QSHmfGQM9UVYDPBsyGGes0y52j32PQ3BqQfXhyH3c=
 google.golang.org/genproto v0.0.0-20200515170657-fc4c6c6a6587/go.mod h1:YsZOwe1myG/8QRHRsmBRE1LrgQY60beZKjly0O1fX9U=
 google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
 google.golang.org/genproto v0.0.0-20200618031413-b414f8b61790/go.mod h1:jDfRM7FcilCzHH/e9qn6dsT145K34l5v+OpcnNgKAAA=
 google.golang.org/genproto v0.0.0-20200729003335-053ba62fc06f/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20200804131852-c06518451d9c/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
 google.golang.org/genproto v0.0.0-20200825200019-8632dd797987/go.mod h1:FWY/as6DDZQgahTzZj3fqbO1CbirC29ZNUFHwi0/+no=
+google.golang.org/genproto v0.0.0-20220107163113-42d7afdf6368/go.mod h1:5CzLGKJ67TSI2B9POpiiyGha0AjJvZIUgRMt1dSmuhc=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
 google.golang.org/grpc v1.20.1/go.mod h1:10oTOabMzJvdu6/UiuZezV6QK5dSlG84ov/aaiqXj38=
 google.golang.org/grpc v1.21.1/go.mod h1:oYelfM1adQP15Ek0mdvEgi9Df8B9CZIaU1084ijfRaM=
@@ -438,6 +469,9 @@ google.golang.org/grpc v1.28.0/go.mod h1:rpkK4SK4GF4Ach/+MFLZUBavHOvF2JJB5uozKKa
 google.golang.org/grpc v1.29.1/go.mod h1:itym6AZVZYACWQqET3MqgPpjcuV5QH3BxFS3IjizoKk=
 google.golang.org/grpc v1.30.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
 google.golang.org/grpc v1.31.0/go.mod h1:N36X2cJ7JwdamYAgDz+s+rVMFjt3numwzf/HckM8pak=
+google.golang.org/grpc v1.33.1/go.mod h1:fr5YgcSWrqhRRxogOsw7RzIpsmvOZ6IcH4kBYTpR3n0=
+google.golang.org/grpc v1.36.0/go.mod h1:qjiiYl8FncCW8feJPdyg3v6XW24KsRHe+dy9BAGRRjU=
+google.golang.org/grpc v1.40.0/go.mod h1:ogyxbiOoUXAkP+4+xa6PZSE9DZgIHtSpzjDTB9KAK34=
 google.golang.org/protobuf v0.0.0-20200109180630-ec00e32a8dfd/go.mod h1:DFci5gLYBciE7Vtevhsrf46CRTquxDuWsQurQQe4oz8=
 google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
 google.golang.org/protobuf v0.0.0-20200228230310-ab0ca4ff8a60/go.mod h1:cfTl7dwQJ+fmap5saPgwCLgHXTUD7jkjRqWcaiX5VyM=
@@ -459,10 +493,13 @@ gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8
 gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.5/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
+gopkg.in/yaml.v3 v3.0.0-20200615113413-eeeca48fe776/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=

prometheus.go

@@ -2,6 +2,7 @@ package prometheus
 
 import (
 	"fmt"
+	"hash/fnv"
 	"io"
 	"sync"
 	"time"
@@ -13,26 +14,73 @@ import (
 	"go.unistack.org/micro/v3/meter"
 )
 
+var _ meter.Meter = &prometheusMeter{}
+
 type prometheusMeter struct {
 	opts         meter.Options
 	set          prometheus.Registerer
-	counter      map[string]prometheusCounter
+	counter      map[string]*counters
-	floatCounter map[string]prometheusFloatCounter
+	floatCounter map[string]*floatCounters
-	gauge        map[string]prometheusGauge
+	gauge        map[string]*gauges
-	histogram    map[string]prometheusHistogram
+	histogram    map[string]*histograms
-	summary      map[string]prometheusSummary
+	summary      map[string]*summaries
 	sync.Mutex
 }
 
-func NewMeter(opts ...meter.Option) meter.Meter {
+type counters struct {
+	cs map[uint64]*prometheusCounter
+}
+
+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 newMt(v dto.MetricType) *dto.MetricType {
+	nv := v
+	return &nv
+}
+
+func newInt(v int) *int {
+	nv := v
+	return &nv
+}
+
+func newInt64(v int64) *int64 {
+	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),
+		counter:      make(map[string]*counters),
-		floatCounter: make(map[string]prometheusFloatCounter),
+		floatCounter: make(map[string]*floatCounters),
-		gauge:        make(map[string]prometheusGauge),
+		gauge:        make(map[string]*gauges),
-		histogram:    make(map[string]prometheusHistogram),
+		histogram:    make(map[string]*histograms),
-		summary:      make(map[string]prometheusSummary),
+		summary:      make(map[string]*summaries),
 	}
 }
 
@@ -69,17 +117,16 @@ 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]
+		nlabels = append(nlabels, m.opts.LabelPrefix+labels[idx])
+		nlabels = append(nlabels, labels[idx+1])
 		idx++
 	}
 	return nlabels
@@ -89,114 +136,149 @@ 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.buildName(name)
-	c, ok := m.counter[nm]
+	labels = m.buildLabels(append(m.opts.Labels, labels...)...)
+	cd, ok := m.counter[nm]
+	h := newHash(labels)
 	if !ok {
-		nc := prometheus.NewGauge(prometheus.GaugeOpts{Name: nm, ConstLabels: m.mapLabels(labels...)})
+		cd = &counters{cs: make(map[uint64]*prometheusCounter)}
-		m.set.MustRegister(nc)
+		c := &prometheusCounter{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: nm}), labels: labels}
-		c = prometheusCounter{c: nc}
+		cd.cs[h] = c
-		m.counter[nm] = c
+		m.counter[nm] = cd
+		return c
+	}
+	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 (m *prometheusMeter) FloatCounter(name string, labels ...string) meter.FloatCounter {
 	m.Lock()
 	defer m.Unlock()
-
 	nm := m.buildName(name)
-	c, ok := m.floatCounter[nm]
+	labels = m.buildLabels(append(m.opts.Labels, labels...)...)
+	cd, ok := m.floatCounter[nm]
+	h := newHash(labels)
 	if !ok {
-		nc := prometheus.NewGauge(prometheus.GaugeOpts{Name: nm, ConstLabels: m.mapLabels(labels...)})
+		cd = &floatCounters{cs: make(map[uint64]*prometheusFloatCounter)}
-		m.set.MustRegister(nc)
+		c := &prometheusFloatCounter{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: nm}), labels: labels}
-		c = prometheusFloatCounter{c: nc}
+		cd.cs[h] = c
-		m.floatCounter[nm] = c
+		m.floatCounter[nm] = cd
+		return c
+	}
+	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 (m *prometheusMeter) Gauge(name string, fn func() float64, labels ...string) meter.Gauge {
 	m.Lock()
 	defer m.Unlock()
-
 	nm := m.buildName(name)
-	c, ok := m.gauge[nm]
+	labels = m.buildLabels(append(m.opts.Labels, labels...)...)
+	cd, ok := m.gauge[nm]
+	h := newHash(labels)
 	if !ok {
-		nc := prometheus.NewGauge(prometheus.GaugeOpts{Name: nm, ConstLabels: m.mapLabels(labels...)})
+		cd = &gauges{cs: make(map[uint64]*prometheusGauge)}
-		m.set.MustRegister(nc)
+		c := &prometheusGauge{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: nm}), labels: labels}
-		c = prometheusGauge{c: nc}
+		cd.cs[h] = c
-		m.gauge[nm] = c
+		m.gauge[nm] = cd
+		return c
+	}
+	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 (m *prometheusMeter) Histogram(name string, labels ...string) meter.Histogram {
 	m.Lock()
 	defer m.Unlock()
-
 	nm := m.buildName(name)
-	c, ok := m.histogram[nm]
+	labels = m.buildLabels(append(m.opts.Labels, labels...)...)
+	cd, ok := m.histogram[nm]
+	h := newHash(labels)
 	if !ok {
-		nc := prometheus.NewHistogram(prometheus.HistogramOpts{Name: nm, ConstLabels: m.mapLabels(labels...)})
+		cd = &histograms{cs: make(map[uint64]*prometheusHistogram)}
-		m.set.MustRegister(nc)
+		c := &prometheusHistogram{c: prometheus.NewHistogram(prometheus.HistogramOpts{Name: nm}), labels: labels}
-		c = prometheusHistogram{c: nc}
+		cd.cs[h] = c
-		m.histogram[nm] = c
+		m.histogram[nm] = cd
+		return c
+	}
+	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 (m *prometheusMeter) Summary(name string, labels ...string) meter.Summary {
 	m.Lock()
 	defer m.Unlock()
-
 	nm := m.buildName(name)
-	c, ok := m.summary[nm]
+	labels = m.buildLabels(append(m.opts.Labels, labels...)...)
+	cd, ok := m.summary[nm]
+	h := newHash(labels)
 	if !ok {
-		nc := prometheus.NewSummary(prometheus.SummaryOpts{Name: nm, ConstLabels: m.mapLabels(labels...)})
+		cd = &summaries{cs: make(map[uint64]*prometheusSummary)}
-		m.set.MustRegister(nc)
+		c := &prometheusSummary{c: prometheus.NewSummary(prometheus.SummaryOpts{Name: nm}), labels: labels}
-		c = prometheusSummary{c: nc}
+		cd.cs[h] = c
-		m.summary[nm] = c
+		m.summary[nm] = cd
+		return c
+	}
+	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 (m *prometheusMeter) SummaryExt(name string, window time.Duration, quantiles []float64, labels ...string) meter.Summary {
 	m.Lock()
 	defer m.Unlock()
-
 	nm := m.buildName(name)
-	c, ok := m.summary[nm]
+	labels = m.buildLabels(append(m.opts.Labels, labels...)...)
+	cd, ok := m.summary[nm]
+	h := newHash(labels)
 	if !ok {
-		nc := prometheus.NewSummary(prometheus.SummaryOpts{
+		cd = &summaries{cs: make(map[uint64]*prometheusSummary)}
+		c := &prometheusSummary{c: prometheus.NewSummary(prometheus.SummaryOpts{
 			Name:       nm,
-			ConstLabels: m.mapLabels(labels...),
 			MaxAge:     window,
 			Objectives: map[float64]float64{0.5: 0.05, 0.9: 0.01, 0.99: 0.001},
-		})
+		}), labels: labels}
-		m.set.MustRegister(nc)
+		cd.cs[h] = c
-		c = prometheusSummary{c: nc}
+		m.summary[nm] = cd
-		m.summary[nm] = c
+		return c
+	}
+	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
 }
 
@@ -204,7 +286,6 @@ func (m *prometheusMeter) Init(opts ...meter.Option) error {
 	for _, o := range opts {
 		o(&m.opts)
 	}
-
 	return nil
 }
 
@@ -230,6 +311,57 @@ func (m *prometheusMeter) Write(w io.Writer, opts ...meter.Option) error {
 	}
 
 	enc := expfmt.NewEncoder(w, expfmt.FmtText)
+
+	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{
+				Label: make([]*dto.LabelPair, 0, len(c.labels)/2),
+				Gauge: &dto.Gauge{
+					Value: newFloat64(float64(c.Get())),
+				},
+			}
+			for idx := 0; idx < len(c.labels); idx++ {
+				m.Label = append(m.Label, &dto.LabelPair{
+					Name:  &c.labels[idx],
+					Value: &c.labels[idx+1],
+				})
+				idx++
+			}
+			mf.Metric = append(mf.Metric, m)
+		}
+		mfs = append(mfs, mf)
+	}
+
+	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{
+				Label: make([]*dto.LabelPair, 0, len(c.labels)/2),
+				Gauge: &dto.Gauge{
+					Value: newFloat64(float64(c.Get())),
+				},
+			}
+			for idx := 0; idx < len(c.labels); idx++ {
+				m.Label = append(m.Label, &dto.LabelPair{
+					Name:  &c.labels[idx],
+					Value: &c.labels[idx+1],
+				})
+				idx++
+			}
+			mf.Metric = append(mf.Metric, m)
+		}
+		mfs = append(mfs, mf)
+	}
+
 	for _, mf := range mfs {
 		_ = enc.Encode(mf)
 	}
@@ -276,21 +408,22 @@ func (m *prometheusMeter) Set(opts ...meter.Option) meter.Meter {
 
 type prometheusCounter struct {
 	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 +431,13 @@ 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
+	labels []string
 }
 
 func (c prometheusFloatCounter) Add(n float64) {
@@ -328,6 +462,7 @@ func (c prometheusFloatCounter) Sub(n float64) {
 
 type prometheusGauge struct {
 	c      prometheus.Gauge
+	labels []string
 }
 
 func (c prometheusGauge) Get() float64 {
@@ -340,6 +475,7 @@ func (c prometheusGauge) Get() float64 {
 
 type prometheusHistogram struct {
 	c      prometheus.Histogram
+	labels []string
 }
 
 func (c prometheusHistogram) Reset() {
@@ -355,6 +491,7 @@ func (c prometheusHistogram) UpdateDuration(n time.Time) {
 
 type prometheusSummary struct {
 	c      prometheus.Summary
+	labels []string
 }
 
 func (c prometheusSummary) Update(n float64) {
@@ -364,3 +501,12 @@ 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()
+}

prometheus_test.go

@@ -13,9 +13,8 @@ import (
 
 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 +49,22 @@ 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())
+	}
+}