mirror of https://github.com/k3s-io/k3s
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
76 lines
2.2 KiB
76 lines
2.2 KiB
// Copyright The OpenTelemetry Authors
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package trace // import "go.opentelemetry.io/otel/sdk/trace"
|
|
|
|
import (
|
|
"context"
|
|
rt "runtime/trace"
|
|
|
|
"go.opentelemetry.io/otel/trace"
|
|
|
|
"go.opentelemetry.io/otel/sdk/instrumentation"
|
|
)
|
|
|
|
type tracer struct {
|
|
provider *TracerProvider
|
|
instrumentationLibrary instrumentation.Library
|
|
}
|
|
|
|
var _ trace.Tracer = &tracer{}
|
|
|
|
// Start starts a Span and returns it along with a context containing it.
|
|
//
|
|
// The Span is created with the provided name and as a child of any existing
|
|
// span context found in the passed context. The created Span will be
|
|
// configured appropriately by any SpanOption passed. Any Timestamp option
|
|
// passed will be used as the start time of the Span's life-cycle.
|
|
func (tr *tracer) Start(ctx context.Context, name string, options ...trace.SpanOption) (context.Context, trace.Span) {
|
|
config := trace.NewSpanConfig(options...)
|
|
|
|
// For local spans created by this SDK, track child span count.
|
|
if p := trace.SpanFromContext(ctx); p != nil {
|
|
if sdkSpan, ok := p.(*span); ok {
|
|
sdkSpan.addChild()
|
|
}
|
|
}
|
|
|
|
span := startSpanInternal(ctx, tr, name, config)
|
|
for _, l := range config.Links {
|
|
span.addLink(l)
|
|
}
|
|
span.SetAttributes(config.Attributes...)
|
|
|
|
span.tracer = tr
|
|
|
|
if span.IsRecording() {
|
|
sps, _ := tr.provider.spanProcessors.Load().(spanProcessorStates)
|
|
for _, sp := range sps {
|
|
sp.sp.OnStart(ctx, span)
|
|
}
|
|
}
|
|
|
|
ctx, span.executionTracerTaskEnd = func(ctx context.Context) (context.Context, func()) {
|
|
if !rt.IsEnabled() {
|
|
// Avoid additional overhead if
|
|
// runtime/trace is not enabled.
|
|
return ctx, func() {}
|
|
}
|
|
nctx, task := rt.NewTask(ctx, name)
|
|
return nctx, task.End
|
|
}(ctx)
|
|
|
|
return trace.ContextWithSpan(ctx, span), span
|
|
}
|