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tracer.go
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tracer.go
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package tracing
import (
"context"
"go.opentelemetry.io/otel"
"go.opentelemetry.io/otel/propagation"
"go.opentelemetry.io/otel/sdk/resource"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
semconv "go.opentelemetry.io/otel/semconv/v1.20.0"
"go.opentelemetry.io/otel/trace"
)
const ServiceName = "exemplars"
func Tracer() trace.Tracer {
return otel.GetTracerProvider().Tracer(ServiceName)
}
type ShutdownFunc func(err context.Context) error
func Init(ctx context.Context, traceExporter sdktrace.SpanExporter) (ShutdownFunc, error) {
res, err := resource.New(ctx,
resource.WithAttributes(semconv.ServiceName(ServiceName)),
)
if err != nil {
return nil, err
}
bsp := sdktrace.NewBatchSpanProcessor(traceExporter)
tracerProvider := sdktrace.NewTracerProvider(
sdktrace.WithSampler(sdktrace.AlwaysSample()),
sdktrace.WithResource(res),
sdktrace.WithSpanProcessor(bsp),
)
otel.SetTracerProvider(tracerProvider)
otel.SetTextMapPropagator(propagation.TraceContext{})
return tracerProvider.Shutdown, nil
}