VictoriaMetrics/vendor/go.opentelemetry.io/otel/trace/tracer.go
2024-09-08 21:05:06 +02:00

37 lines
1.6 KiB
Go

// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package trace // import "go.opentelemetry.io/otel/trace"
import (
"context"
"go.opentelemetry.io/otel/trace/embedded"
)
// Tracer is the creator of Spans.
//
// Warning: Methods may be added to this interface in minor releases. See
// package documentation on API implementation for information on how to set
// default behavior for unimplemented methods.
type Tracer interface {
// Users of the interface can ignore this. This embedded type is only used
// by implementations of this interface. See the "API Implementations"
// section of the package documentation for more information.
embedded.Tracer
// Start creates a span and a context.Context containing the newly-created span.
//
// If the context.Context provided in `ctx` contains a Span then the newly-created
// Span will be a child of that span, otherwise it will be a root span. This behavior
// can be overridden by providing `WithNewRoot()` as a SpanOption, causing the
// newly-created Span to be a root span even if `ctx` contains a Span.
//
// When creating a Span it is recommended to provide all known span attributes using
// the `WithAttributes()` SpanOption as samplers will only have access to the
// attributes provided when a Span is created.
//
// Any Span that is created MUST also be ended. This is the responsibility of the user.
// Implementations of this API may leak memory or other resources if Spans are not ended.
Start(ctx context.Context, spanName string, opts ...SpanStartOption) (context.Context, Span)
}