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lib.go
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lib.go
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package lib
import (
"log"
"go.opentelemetry.io/otel/exporters/stdout/stdouttrace"
"go.opentelemetry.io/otel/sdk/resource"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
semconv "go.opentelemetry.io/otel/semconv/v1.24.0"
)
// NewTracerProvider returns a new provider for tracers. An application should
// call this function only once, as per the documentation:
// https://opentelemetry.io/docs/concepts/signals/traces/#tracer-provider
func NewTracerProvider(serviceName string) *sdktrace.TracerProvider {
var (
err error
exp sdktrace.SpanExporter
res *resource.Resource
)
// Set the service name in the resource.
if res, err = resource.Merge(
resource.Default(),
resource.NewWithAttributes(
semconv.SchemaURL,
semconv.ServiceName(serviceName),
),
); err != nil {
log.Fatal(err)
}
// Export traces to stdout for simplicity.
if exp, err = stdouttrace.New(stdouttrace.WithPrettyPrint()); err != nil {
log.Fatal(err)
}
return sdktrace.NewTracerProvider(
sdktrace.WithBatcher(exp),
sdktrace.WithResource(res),
)
}