v1 Create a subscriber application with OpenTelemetry enabled (DEPRECATED)
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(DEPRECATED) Create a subscriber application with OpenTelemetry enabled
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[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],[],[],[],null,["# v1 Create a subscriber application with OpenTelemetry enabled (DEPRECATED)\n\n(DEPRECATED) Create a subscriber application with OpenTelemetry enabled\n\nCode sample\n-----------\n\n### Go\n\n\nBefore trying this sample, follow the Go setup instructions in the\n[Pub/Sub quickstart using\nclient libraries](/pubsub/docs/quickstart-client-libraries).\n\n\nFor more information, see the\n[Pub/Sub Go API\nreference documentation](https://godoc.org/cloud.google.com/go/pubsub).\n\n\nTo authenticate to Pub/Sub, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n import (\n \t\"context\"\n \t\"fmt\"\n \t\"io\"\n \t\"sync/atomic\"\n \t\"time\"\n\n \t\"cloud.google.com/go/pubsub\"\n \ttexporter \"github.com/GoogleCloudPlatform/opentelemetry-operations-go/exporter/trace\"\n \t\"go.opentelemetry.io/otel\"\n \t\"go.opentelemetry.io/otel/sdk/resource\"\n \tsdktrace \"go.opentelemetry.io/otel/sdk/trace\"\n \tsemconv \"go.opentelemetry.io/otel/semconv/v1.24.0\"\n \t\"google.golang.org/api/option\"\n )\n\n func subscribeOpenTelemetryTracing(w io.Writer, projectID, subID string, sampleRate float64) error {\n \t// projectID := \"my-project-id\"\n \t// subID := \"my-sub\"\n \t// sampleRate := \"1.0\"\n \tctx := context.Background()\n\n \texporter, err := texporter.New(texporter.WithProjectID(projectID),\n \t\t// Disable spans created by the exporter.\n \t\ttexporter.WithTraceClientOptions(\n \t\t\t[]option.ClientOption{option.WithTelemetryDisabled()},\n \t\t),\n \t)\n \tif err != nil {\n \t\treturn fmt.Errorf(\"error instantiating exporter: %w\", err)\n \t}\n\n \tresources := resource.NewWithAttributes(\n \t\tsemconv.SchemaURL,\n \t\tsemconv.ServiceNameKey.String(\"subscriber\"),\n \t)\n\n \t// Instantiate a tracer provider with the following settings\n \ttp := sdktrace.NewTracerProvider(\n \t\tsdktrace.WithBatcher(exporter),\n \t\tsdktrace.WithResource(resources),\n \t\tsdktrace.WithSampler(\n \t\t\tsdktrace.ParentBased(sdktrace.TraceIDRatioBased(sampleRate)),\n \t\t),\n \t)\n\n \tdefer tp.ForceFlush(ctx) // flushes any pending spans\n \totel.SetTracerProvider(tp)\n\n \t// Create a new client with tracing enabled.\n \tclient, err := pubsub.https://cloud.google.com/go/docs/reference/cloud.google.com/go/pubsub/latest/index.html#cloud_google_com_go_pubsub_Client_NewClientWithConfig(ctx, projectID, &pubsub.https://cloud.google.com/go/docs/reference/cloud.google.com/go/pubsub/latest/index.html#cloud_google_com_go_pubsub_ClientConfig{\n \t\tEnableOpenTelemetryTracing: true,\n \t})\n \tif err != nil {\n \t\treturn fmt.Errorf(\"pubsub.NewClient: %w\", err)\n \t}\n \tdefer client.Close()\n\n \tsub := client.Subscription(subID)\n\n \t// Receive messages for 10 seconds, which simplifies testing.\n \t// Comment this out in production, since `Receive` should\n \t// be used as a long running operation.\n \tctx, cancel := context.WithTimeout(ctx, 10*time.Second)\n \tdefer cancel()\n\n \tvar received int32\n \terr = sub.Receive(ctx, func(_ context.Context, msg *pubsub.Message) {\n \t\tfmt.Fprintf(w, \"Got message: %q\\n\", string(msg.Data))\n \t\tatomic.AddInt32(&received, 1)\n \t\tmsg.Ack()\n \t})\n \tif err != nil {\n \t\treturn fmt.Errorf(\"sub.Receive: %w\", err)\n \t}\n \tfmt.Fprintf(w, \"Received %d messages\\n\", received)\n\n \treturn nil\n }\n\nWhat's next\n-----------\n\n\nTo search and filter code samples for other Google Cloud products, see the\n[Google Cloud sample browser](/docs/samples?product=pubsub)."]]