go.opentelemetry.io/otel/sdk/metric v1.45.0: metricdata.ResourceMetrics

Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify go.opentelemetry.io/otel/sdk/metric/metricdata.ResourceMetrics in pkg:golang/go.opentelemetry.io/otel/sdk/metric@v1.45.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/go.opentelemetry.io/otel/sdk/metric@v1.45.0
Demonstrate these symbols/APIs:
  - go.opentelemetry.io/otel/sdk/metric/metricdata.ResourceMetrics

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.

{"case":{"caseId":"case:sha256:5097e69dd6ad2a8483faadf8383b0e2e7b16795ee0718c4d3266c1c899a2e4e3","contract":["ResourceMetrics holds the Resource and ScopeMetrics produced during metric collection","ManualReader.Collect populates ResourceMetrics with recorded counter measurements","ResourceMetrics.Resource contains the attributes configured on the MeterProvider","ResourceMetrics.ScopeMetrics contains the metric data matching the instrumentation scope"],"goal":"verify go.opentelemetry.io/otel/sdk/metric/metricdata.ResourceMetrics in pkg:golang/go.opentelemetry.io/otel/sdk/metric@v1.45.0","kind":"HOW","packages":["pkg:golang/go.opentelemetry.io/otel/sdk/metric@v1.45.0"],"schemaVersion":1,"symbols":["go.opentelemetry.io/otel/sdk/metric/metricdata.ResourceMetrics"]},"contractCommand":["go","run","./test"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"golang","language":"go","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"go","runtime":"go","schemaVersion":1},"license":"MIT-0","packages":["pkg:golang/go.opentelemetry.io/otel/sdk/metric@v1.45.0"],"schemaVersion":1,"subject":"pkg:golang/go.opentelemetry.io/otel/sdk/metric@v1.45.0","symbols":["go.opentelemetry.io/otel/sdk/metric/metricdata.ResourceMetrics"],"verifierAdapter":"golang@1"}

module example.com/resource-metrics-sample

go 1.26.6

require (
	go.opentelemetry.io/otel v1.45.0
	go.opentelemetry.io/otel/metric v1.45.0
	go.opentelemetry.io/otel/sdk v1.45.0
	go.opentelemetry.io/otel/sdk/metric v1.45.0
)

require (
	github.com/cespare/xxhash/v2 v2.3.0 // indirect
	github.com/go-logr/logr v1.4.4 // indirect
	github.com/go-logr/stdr v1.2.2 // indirect
	github.com/google/uuid v1.6.0 // indirect
	go.opentelemetry.io/auto/sdk v1.2.1 // indirect
	go.opentelemetry.io/otel/trace v1.45.0 // indirect
	golang.org/x/sys v0.47.0 // indirect
)

github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
github.com/go-logr/logr v1.4.4 h1:tG4xh9yMsRCAiodLVTxyrkzSZ9+o0L1Kg/+cPVcbP/8=
github.com/go-logr/logr v1.4.4/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
github.com/go-logr/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
go.opentelemetry.io/auto/sdk v1.2.1 h1:jXsnJ4Lmnqd11kwkBV2LgLoFMZKizbCi5fNZ/ipaZ64=
go.opentelemetry.io/auto/sdk v1.2.1/go.mod h1:KRTj+aOaElaLi+wW1kO/DZRXwkF4C5xPbEe3ZiIhN7Y=
go.opentelemetry.io/otel v1.45.0 h1:pdrWmLHofpubmArBv1LgFSv1Z0Ie/ppdZzu+kUN5EeU=
go.opentelemetry.io/otel v1.45.0/go.mod h1:XZxIqPapzEYnhNSScF5DIqXhm/rYi0FzCe2XddAwZfQ=
go.opentelemetry.io/otel/metric v1.45.0 h1:7Eg1uH7CJ5cXv9is6tnBe1FI6rj1nwUdbFypRm3br/M=
go.opentelemetry.io/otel/metric v1.45.0/go.mod h1:HAPbm1nd3p1PmFH7v2dR+6BjXxw+Lq4a2+pndMAm08s=
go.opentelemetry.io/otel/metric/x v0.67.0 h1:PcicCNZFkZ4bXfSooXdo3WN7RBOVOtjVdo1wD358Uns=
go.opentelemetry.io/otel/metric/x v0.67.0/go.mod h1:FBjCWZe6wgcqxcMtjdGiClDKXb2YxxXii0CXftE4QtI=
go.opentelemetry.io/otel/sdk v1.45.0 h1:4VVSMgQ83dUgW2aoX5f6JgLvHwIvzcuLnF9lUdCSpCw=
go.opentelemetry.io/otel/sdk v1.45.0/go.mod h1:Sr40LgXV7DsKMMJMKOhUWOgMWTfAaqvm2kF0g7ilwuA=
go.opentelemetry.io/otel/sdk/metric v1.45.0 h1:oVFszMfyj1Am6s24Vtc7wBb8BKLcwepJjNEYILuiE3o=
go.opentelemetry.io/otel/sdk/metric v1.45.0/go.mod h1:vUWUxDZvu1WVRj8JA8S0AdhsPrZoDpA2DdZauIh4mDA=
go.opentelemetry.io/otel/trace v1.45.0 h1:l/mP6Uv7oNO7/TblbhpbgMidxhq1uO/rPsikOyVhxag=
go.opentelemetry.io/otel/trace v1.45.0/go.mod h1:qoJJA2xNMnxRrdISU/kLtfUH2wNeQbiv+jhs/CxI8bc=
golang.org/x/sys v0.47.0 h1:o7XGOvZQCADBQQ4Y7VNq2dRWQR7JmOUW8Kxx4ZsNgWs=
golang.org/x/sys v0.47.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

package main

import (
	"context"
	"fmt"
	"os"

	"go.opentelemetry.io/otel/attribute"
	otelmetric "go.opentelemetry.io/otel/metric"
	sdkmetric "go.opentelemetry.io/otel/sdk/metric"
	"go.opentelemetry.io/otel/sdk/metric/metricdata"
	"go.opentelemetry.io/otel/sdk/resource"
)

func main() {
	ctx := context.Background()

	res, err := resource.New(ctx,
		resource.WithAttributes(
			attribute.String("service.name", "demo-service"),
			attribute.String("environment", "production"),
		),
	)
	if err != nil {
		fmt.Fprintf(os.Stderr, "failed to create resource: %v\n", err)
		os.Exit(1)
	}

	reader := sdkmetric.NewManualReader()
	mp := sdkmetric.NewMeterProvider(
		sdkmetric.WithResource(res),
		sdkmetric.WithReader(reader),
	)
	defer func() {
		if err := mp.Shutdown(ctx); err != nil {
			fmt.Fprintf(os.Stderr, "failed to shutdown meter provider: %v\n", err)
		}
	}()

	meter := mp.Meter("demo-metric-scope")
	counter, err := meter.Int64Counter("demo_requests_total")
	if err != nil {
		fmt.Fprintf(os.Stderr, "failed to create counter: %v\n", err)
		os.Exit(1)
	}

	counter.Add(ctx, 42, otelmetric.WithAttributes(attribute.String("route", "/home")))

	var rm metricdata.ResourceMetrics
	if err := reader.Collect(ctx, &rm); err != nil {
		fmt.Fprintf(os.Stderr, "failed to collect ResourceMetrics: %v\n", err)
		os.Exit(1)
	}

	fmt.Printf("Resource: %s\n", rm.Resource.String())
	fmt.Printf("Collected %d ScopeMetrics\n", len(rm.ScopeMetrics))
}

{
  "schemaVersion": 1,
  "goal": "verify go.opentelemetry.io/otel/sdk/metric/metricdata.ResourceMetrics in pkg:golang/go.opentelemetry.io/otel/sdk/metric@v1.45.0",
  "kind": "HOW",
  "packages": [
    "pkg:golang/go.opentelemetry.io/otel/sdk/metric@v1.45.0"
  ],
  "symbols": [
    "go.opentelemetry.io/otel/sdk/metric/metricdata.ResourceMetrics"
  ]
}

package main

import (
	"context"
	"fmt"
	"os"

	"go.opentelemetry.io/otel/attribute"
	otelmetric "go.opentelemetry.io/otel/metric"
	sdkmetric "go.opentelemetry.io/otel/sdk/metric"
	"go.opentelemetry.io/otel/sdk/metric/metricdata"
	"go.opentelemetry.io/otel/sdk/resource"
)

func main() {
	ctx := context.Background()

	// Assertion 1: ResourceMetrics holds Resource and ScopeMetrics fields
	customRes, err := resource.New(ctx,
		resource.WithAttributes(attribute.String("service.name", "contract-test-service")),
	)
	if err != nil {
		fmt.Fprintf(os.Stderr, "FAIL: resource creation error: %v\n", err)
		os.Exit(1)
	}

	reader := sdkmetric.NewManualReader()
	mp := sdkmetric.NewMeterProvider(
		sdkmetric.WithResource(customRes),
		sdkmetric.WithReader(reader),
	)
	defer func() {
		_ = mp.Shutdown(ctx)
	}()

	meter := mp.Meter("test-scope")
	counter, err := meter.Int64Counter("test_counter")
	if err != nil {
		fmt.Fprintf(os.Stderr, "FAIL: counter creation error: %v\n", err)
		os.Exit(1)
	}

	counter.Add(ctx, 25, otelmetric.WithAttributes(attribute.String("key", "val")))

	// Assertion 2: ManualReader.Collect populates ResourceMetrics
	var rm metricdata.ResourceMetrics
	if err := reader.Collect(ctx, &rm); err != nil {
		fmt.Fprintf(os.Stderr, "FAIL: reader.Collect failed: %v\n", err)
		os.Exit(1)
	}

	// Assertion 3: ResourceMetrics.Resource retains configured resource attributes
	if rm.Resource == nil {
		fmt.Fprintf(os.Stderr, "FAIL: ResourceMetrics.Resource is nil\n")
		os.Exit(1)
	}
	var foundServiceName bool
	for _, attr := range rm.Resource.Attributes() {
		if attr.Key == "service.name" && attr.Value.AsString() == "contract-test-service" {
			foundServiceName = true
			break
		}
	}
	if !foundServiceName {
		fmt.Fprintf(os.Stderr, "FAIL: ResourceMetrics.Resource missing expected attribute service.name\n")
		os.Exit(1)
	}

	// Assertion 4: ResourceMetrics.ScopeMetrics contains metric data matching scope
	if len(rm.ScopeMetrics) == 0 {
		fmt.Fprintf(os.Stderr, "FAIL: ResourceMetrics.ScopeMetrics is empty\n")
		os.Exit(1)
	}
	var foundScopeMetric bool
	for _, sm := range rm.ScopeMetrics {
		if sm.Scope.Name == "test-scope" {
			foundScopeMetric = true
			if len(sm.Metrics) == 0 {
				fmt.Fprintf(os.Stderr, "FAIL: ScopeMetrics has no metrics\n")
				os.Exit(1)
			}
			if sm.Metrics[0].Name != "test_counter" {
				fmt.Fprintf(os.Stderr, "FAIL: expected metric name 'test_counter', got %q\n", sm.Metrics[0].Name)
				os.Exit(1)
			}
			sum, ok := sm.Metrics[0].Data.(metricdata.Sum[int64])
			if !ok {
				fmt.Fprintf(os.Stderr, "FAIL: expected Sum[int64] metric data\n")
				os.Exit(1)
			}
			if len(sum.DataPoints) != 1 || sum.DataPoints[0].Value != 25 {
				fmt.Fprintf(os.Stderr, "FAIL: unexpected data points: %+v\n", sum.DataPoints)
				os.Exit(1)
			}
		}
	}
	if !foundScopeMetric {
		fmt.Fprintf(os.Stderr, "FAIL: ScopeMetrics did not contain test-scope\n")
		os.Exit(1)
	}

	fmt.Println("PASS: ResourceMetrics verified")
}