go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc v0.19.0: WithEndpointURL

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 otlploggrpc.WithEndpointURL in pkg:golang/go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc@v0.19.0
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:golang/go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc@v0.19.0
Demonstrate these symbols/APIs:
  - otlploggrpc.WithEndpointURL

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:sha256:1576c08e067fb0f1424c4c2bc6574e21355556018d123e71c9b498c2b88cd69c","contract":["otlploggrpc.WithEndpointURL parses HTTP endpoint URL and configures exporter with insecure transport","LoggerProvider emits structured log records over gRPC via WithEndpointURL","otlploggrpc.Exporter ForceFlush and Shutdown flush records and release exporter resources","otlploggrpc.WithEndpointURL parses HTTPS endpoint URL without error"],"goal":"verify otlploggrpc.WithEndpointURL in pkg:golang/go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc@v0.19.0","kind":"HOW","packages":["pkg:golang/go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc@v0.19.0"],"schemaVersion":1,"symbols":["otlploggrpc.WithEndpointURL"]},"contractCommand":["go","run","./test"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"golang","libc":"glibc","libcVersion":"2.39","os":"linux","osVersionBucket":"24","packageManager":"go","schemaVersion":1},"license":"MIT-0","packages":["pkg:golang/go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc@v0.19.0"],"schemaVersion":1,"subject":"pkg:golang/go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc@v0.19.0","symbols":["otlploggrpc.WithEndpointURL"],"verifierAdapter":"golang@1"}

package sample

import (
	"context"
	"fmt"

	"go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc"
	"go.opentelemetry.io/otel/log"
	sdklog "go.opentelemetry.io/otel/sdk/log"
)

// Config holds configuration options for creating an OTLP log exporter.
type Config struct {
	EndpointURL string
}

// NewExporter creates a new OTLP gRPC log exporter configured with WithEndpointURL.
func NewExporter(ctx context.Context, cfg Config) (*otlploggrpc.Exporter, error) {
	var opts []otlploggrpc.Option
	if cfg.EndpointURL != "" {
		opts = append(opts, otlploggrpc.WithEndpointURL(cfg.EndpointURL))
	}
	exp, err := otlploggrpc.New(ctx, opts...)
	if err != nil {
		return nil, fmt.Errorf("failed to create otlploggrpc exporter: %w", err)
	}
	return exp, nil
}

// NewLoggerProvider creates an OpenTelemetry LoggerProvider wired to the given exporter.
func NewLoggerProvider(exporter *otlploggrpc.Exporter) *sdklog.LoggerProvider {
	processor := sdklog.NewSimpleProcessor(exporter)
	return sdklog.NewLoggerProvider(
		sdklog.WithProcessor(processor),
	)
}

// EmitLogRecord emits a structured log record to the specified logger.
func EmitLogRecord(ctx context.Context, provider *sdklog.LoggerProvider, scopeName string, msg string, severity log.Severity, attrs ...log.KeyValue) {
	logger := provider.Logger(scopeName)
	var record log.Record
	record.SetBody(log.StringValue(msg))
	record.SetSeverity(severity)
	record.AddAttributes(attrs...)
	logger.Emit(ctx, record)
}

module sample

go 1.26.6

require (
	go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc v0.19.0
	go.opentelemetry.io/otel/log v0.19.0
	go.opentelemetry.io/otel/sdk/log v0.19.0
	go.opentelemetry.io/proto/otlp v1.10.0
	google.golang.org/grpc v1.80.0
)

require (
	github.com/cenkalti/backoff/v5 v5.0.3 // indirect
	github.com/cespare/xxhash/v2 v2.3.0 // indirect
	github.com/go-logr/logr v1.4.3 // indirect
	github.com/go-logr/stdr v1.2.2 // indirect
	github.com/google/uuid v1.6.0 // indirect
	github.com/grpc-ecosystem/grpc-gateway/v2 v2.28.0 // indirect
	go.opentelemetry.io/auto/sdk v1.2.1 // indirect
	go.opentelemetry.io/otel v1.43.0 // indirect
	go.opentelemetry.io/otel/metric v1.43.0 // indirect
	go.opentelemetry.io/otel/sdk v1.43.0 // indirect
	go.opentelemetry.io/otel/trace v1.43.0 // indirect
	golang.org/x/net v0.52.0 // indirect
	golang.org/x/sys v0.42.0 // indirect
	golang.org/x/text v0.35.0 // indirect
	google.golang.org/genproto/googleapis/api v0.0.0-20260401024825-9d38bb4040a9 // indirect
	google.golang.org/genproto/googleapis/rpc v0.0.0-20260401024825-9d38bb4040a9 // indirect
	google.golang.org/protobuf v1.36.11 // indirect
)

github.com/cenkalti/backoff/v5 v5.0.3 h1:ZN+IMa753KfX5hd8vVaMixjnqRZ3y8CuJKRKj1xcsSM=
github.com/cenkalti/backoff/v5 v5.0.3/go.mod h1:rkhZdG3JZukswDf7f0cwqPNk4K0sa+F97BxZthm/crw=
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 v1.4.3 h1:CjnDlHq8ikf6E492q6eKboGOC0T8CDaOvkHCIg8idEI=
github.com/go-logr/logr v1.4.3/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/golang/protobuf v1.5.4 h1:i7eJL8qZTpSEXOPTxNKhASYpMn+8e5Q6AdndVa1dWek=
github.com/golang/protobuf v1.5.4/go.mod h1:lnTiLA8Wa4RWRcIUkrtSVa5nRhsEGBg48fD6rSs7xps=
github.com/google/go-cmp v0.7.0 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/grpc-ecosystem/grpc-gateway/v2 v2.28.0 h1:HWRh5R2+9EifMyIHV7ZV+MIZqgz+PMpZ14Jynv3O2Zs=
github.com/grpc-ecosystem/grpc-gateway/v2 v2.28.0/go.mod h1:JfhWUomR1baixubs02l85lZYYOm7LV6om4ceouMv45c=
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 v1.43.0 h1:mYIM03dnh5zfN7HautFE4ieIig9amkNANT+xcVxAj9I=
go.opentelemetry.io/otel v1.43.0/go.mod h1:JuG+u74mvjvcm8vj8pI5XiHy1zDeoCS2LB1spIq7Ay0=
go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc v0.19.0 h1:Dn8rkudDzY6KV9dr/D/bTUuWgqDf9xe0rr4G2elrn0Y=
go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc v0.19.0/go.mod h1:gMk9F0xDgyN9M/3Ed5Y1wKcx/9mlU91NXY2SNq7RQuU=
go.opentelemetry.io/otel/log v0.19.0 h1:KUZs/GOsw79TBBMfDWsXS+KZ4g2Ckzksd1ymzsIEbo4=
go.opentelemetry.io/otel/log v0.19.0/go.mod h1:5DQYeGmxVIr4n0/BcJvF4upsraHjg6vudJJpnkL6Ipk=
go.opentelemetry.io/otel/metric v1.43.0 h1:d7638QeInOnuwOONPp4JAOGfbCEpYb+K6DVWvdxGzgM=
go.opentelemetry.io/otel/metric v1.43.0/go.mod h1:RDnPtIxvqlgO8GRW18W6Z/4P462ldprJtfxHxyKd2PY=
go.opentelemetry.io/otel/sdk v1.43.0 h1:pi5mE86i5rTeLXqoF/hhiBtUNcrAGHLKQdhg4h4V9Dg=
go.opentelemetry.io/otel/sdk v1.43.0/go.mod h1:P+IkVU3iWukmiit/Yf9AWvpyRDlUeBaRg6Y+C58QHzg=
go.opentelemetry.io/otel/sdk/log v0.19.0 h1:scYVLqT22D2gqXItnWiocLUKGH9yvkkeql5dBDiXyko=
go.opentelemetry.io/otel/sdk/log v0.19.0/go.mod h1:vFBowwXGLlW9AvpuF7bMgnNI95LiW10szrOdvzBHlAg=
go.opentelemetry.io/otel/sdk/log/logtest v0.19.0 h1:BEbF7ZBB6qQloV/Ub1+3NQoOUnVtcGkU3XX4Ws3GQfk=
go.opentelemetry.io/otel/sdk/log/logtest v0.19.0/go.mod h1:Lua81/3yM0wOmoHTokLj9y9ADeA02v1naRrVrkAZuKk=
go.opentelemetry.io/otel/sdk/metric v1.43.0 h1:S88dyqXjJkuBNLeMcVPRFXpRw2fuwdvfCGLEo89fDkw=
go.opentelemetry.io/otel/sdk/metric v1.43.0/go.mod h1:C/RJtwSEJ5hzTiUz5pXF1kILHStzb9zFlIEe85bhj6A=
go.opentelemetry.io/otel/trace v1.43.0 h1:BkNrHpup+4k4w+ZZ86CZoHHEkohws8AY+WTX09nk+3A=
go.opentelemetry.io/otel/trace v1.43.0/go.mod h1:/QJhyVBUUswCphDVxq+8mld+AvhXZLhe+8WVFxiFff0=
go.opentelemetry.io/proto/otlp v1.10.0 h1:IQRWgT5srOCYfiWnpqUYz9CVmbO8bFmKcwYxpuCSL2g=
go.opentelemetry.io/proto/otlp v1.10.0/go.mod h1:/CV4QoCR/S9yaPj8utp3lvQPoqMtxXdzn7ozvvozVqk=
golang.org/x/net v0.52.0 h1:He/TN1l0e4mmR3QqHMT2Xab3Aj3L9qjbhRm78/6jrW0=
golang.org/x/net v0.52.0/go.mod h1:R1MAz7uMZxVMualyPXb+VaqGSa3LIaUqk0eEt3w36Sw=
golang.org/x/sys v0.42.0 h1:omrd2nAlyT5ESRdCLYdm3+fMfNFE/+Rf4bDIQImRJeo=
golang.org/x/sys v0.42.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
golang.org/x/text v0.35.0 h1:JOVx6vVDFokkpaq1AEptVzLTpDe9KGpj5tR4/X+ybL8=
golang.org/x/text v0.35.0/go.mod h1:khi/HExzZJ2pGnjenulevKNX1W67CUy0AsXcNubPGCA=
gonum.org/v1/gonum v0.17.0 h1:VbpOemQlsSMrYmn7T2OUvQ4dqxQXU+ouZFQsZOx50z4=
gonum.org/v1/gonum v0.17.0/go.mod h1:El3tOrEuMpv2UdMrbNlKEh9vd86bmQ6vqIcDwxEOc1E=
google.golang.org/genproto/googleapis/api v0.0.0-20260401024825-9d38bb4040a9 h1:VPWxll4HlMw1Vs/qXtN7BvhZqsS9cdAittCNvVENElA=
google.golang.org/genproto/googleapis/api v0.0.0-20260401024825-9d38bb4040a9/go.mod h1:7QBABkRtR8z+TEnmXTqIqwJLlzrZKVfAUm7tY3yGv0M=
google.golang.org/genproto/googleapis/rpc v0.0.0-20260401024825-9d38bb4040a9 h1:m8qni9SQFH0tJc1X0vmnpw/0t+AImlSvp30sEupozUg=
google.golang.org/genproto/googleapis/rpc v0.0.0-20260401024825-9d38bb4040a9/go.mod h1:4Hqkh8ycfw05ld/3BWL7rJOSfebL2Q+DVDeRgYgxUU8=
google.golang.org/grpc v1.80.0 h1:Xr6m2WmWZLETvUNvIUmeD5OAagMw3FiKmMlTdViWsHM=
google.golang.org/grpc v1.80.0/go.mod h1:ho/dLnxwi3EDJA4Zghp7k2Ec1+c2jqup0bFkw07bwF4=
google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=
google.golang.org/protobuf v1.36.11/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

{
  "schemaVersion": 1,
  "goal": "verify otlploggrpc.WithEndpointURL in pkg:golang/go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc@v0.19.0",
  "kind": "HOW",
  "packages": [
    "pkg:golang/go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc@v0.19.0"
  ],
  "symbols": [
    "otlploggrpc.WithEndpointURL"
  ]
}

package main

import (
	"context"
	"fmt"
	"net"
	"os"
	"sync"
	"time"

	"go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc"
	"go.opentelemetry.io/otel/log"
	collogpb "go.opentelemetry.io/proto/otlp/collector/logs/v1"
	"google.golang.org/grpc"

	"sample"
)

type mockLogsServiceServer struct {
	collogpb.UnimplementedLogsServiceServer
	mu       sync.Mutex
	requests []*collogpb.ExportLogsServiceRequest
}

func (s *mockLogsServiceServer) Export(ctx context.Context, req *collogpb.ExportLogsServiceRequest) (*collogpb.ExportLogsServiceResponse, error) {
	s.mu.Lock()
	defer s.mu.Unlock()
	s.requests = append(s.requests, req)
	return &collogpb.ExportLogsServiceResponse{}, nil
}

func (s *mockLogsServiceServer) getRequests() []*collogpb.ExportLogsServiceRequest {
	s.mu.Lock()
	defer s.mu.Unlock()
	res := make([]*collogpb.ExportLogsServiceRequest, len(s.requests))
	copy(res, s.requests)
	return res
}

func main() {
	// 1. Start mock in-process OTLP gRPC collector on localhost
	lis, err := net.Listen("tcp", "127.0.0.1:0")
	if err != nil {
		fmt.Fprintf(os.Stderr, "failed to listen on local port: %v\n", err)
		os.Exit(1)
	}
	defer lis.Close()

	grpcServer := grpc.NewServer()
	mockServer := &mockLogsServiceServer{}
	collogpb.RegisterLogsServiceServer(grpcServer, mockServer)

	go func() {
		_ = grpcServer.Serve(lis)
	}()
	defer grpcServer.Stop()

	tcpAddr := lis.Addr().(*net.TCPAddr)
	serverURL := fmt.Sprintf("http://127.0.0.1:%d", tcpAddr.Port)

	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

	// 2. otlploggrpc.WithEndpointURL parses HTTP URL and configures exporter with insecure transport
	exp, err := sample.NewExporter(ctx, sample.Config{
		EndpointURL: serverURL,
	})
	if err != nil {
		fmt.Fprintf(os.Stderr, "NewExporter with HTTP URL failed: %v\n", err)
		os.Exit(1)
	}
	if exp == nil {
		fmt.Fprintf(os.Stderr, "expected non-nil exporter instance\n")
		os.Exit(1)
	}

	// 3. LoggerProvider emits structured log records over gRPC via WithEndpointURL
	provider := sample.NewLoggerProvider(exp)
	sample.EmitLogRecord(ctx, provider, "audit-scope", "transaction processed successfully", log.SeverityInfo,
		log.String("tx.id", "tx-100"),
		log.Int("status", 200),
	)

	// 4. ForceFlush and Shutdown flush records and release exporter resources
	if err := exp.ForceFlush(ctx); err != nil {
		fmt.Fprintf(os.Stderr, "exporter ForceFlush failed: %v\n", err)
		os.Exit(1)
	}

	if err := provider.Shutdown(ctx); err != nil {
		fmt.Fprintf(os.Stderr, "provider Shutdown failed: %v\n", err)
		os.Exit(1)
	}

	// 5. Verify records received by mock collector
	reqs := mockServer.getRequests()
	if len(reqs) == 0 {
		fmt.Fprintf(os.Stderr, "expected at least one ExportLogsServiceRequest received\n")
		os.Exit(1)
	}

	foundLog := false
	for _, req := range reqs {
		for _, resourceLog := range req.GetResourceLogs() {
			for _, scopeLog := range resourceLog.GetScopeLogs() {
				if scopeLog.GetScope().GetName() == "audit-scope" {
					for _, rec := range scopeLog.GetLogRecords() {
						if rec.GetBody().GetStringValue() == "transaction processed successfully" {
							foundLog = true
						}
					}
				}
			}
		}
	}
	if !foundLog {
		fmt.Fprintf(os.Stderr, "expected log record not found in mock collector requests\n")
		os.Exit(1)
	}

	// 6. otlploggrpc.WithEndpointURL parses HTTPS endpoint URL without error
	httpsExp, err := sample.NewExporter(ctx, sample.Config{
		EndpointURL: "https://127.0.0.1:4317",
	})
	if err != nil {
		fmt.Fprintf(os.Stderr, "NewExporter with HTTPS URL failed: %v\n", err)
		os.Exit(1)
	}
	_ = httpsExp.Shutdown(ctx)

	// 7. otlploggrpc.Version returns non-empty string
	if v := otlploggrpc.Version(); v == "" {
		fmt.Fprintf(os.Stderr, "expected non-empty version from otlploggrpc.Version()\n")
		os.Exit(1)
	}

	fmt.Println("Contract verification passed successfully.")
}