mirror of
https://github.com/open-telemetry/opentelemetry-go.git
synced 2025-03-03 14:52:56 +02:00
83935b2558
* add propagation api. * add http propagator interface and w3c propagator implementation. * remove Extract api from trace. * remove Extract interface for tracer. * fix copyright. * fix variable names and comments. * move inject/extract out of trace. * replace INVALID_SPAN_CONTEXT with EmptySpanContext function. * fix tag.Map. * make carrier as interface instead of http.Request. * rename structs and update doc comments.. * add doc.go * update doc. * add noop propagator. * add new propagation api with Supplier interface. - added Default Tracer which simply propagates SpanContext. - added CopyOfRemote option to simply create remote span. * remove old propagator. * rename propagator to TextFormatPropagator. * rename default tracer/span as pass_through tracer/span. * add test for pass through tracer. * add missing interface to pass through tracer. * return SpanContext instead of contex.Context from Extract interface. - also remove PassThroughTracer * fix review comments. * add more test cases for traceContext extraction. * remove tidy temporarily from circle-ci target to avoid build failure. * allow header ending in dash '-'. * add inject test for non-zero value other than 01 for traceoption * add AddLink and Link interface to MockSpan * fix running go mod tidy on every build.
104 lines
3.1 KiB
Go
104 lines
3.1 KiB
Go
// Copyright 2019, OpenTelemetry Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package trace
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import (
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"context"
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"go.opentelemetry.io/api/core"
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apitrace "go.opentelemetry.io/api/trace"
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)
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type tracer struct {
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name string
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component string
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resources []core.KeyValue
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}
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var _ apitrace.Tracer = &tracer{}
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func (tr *tracer) Start(ctx context.Context, name string, o ...apitrace.SpanOption) (context.Context, apitrace.Span) {
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var opts apitrace.SpanOptions
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var parent core.SpanContext
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var remoteParent bool
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//TODO [rghetia] : Add new option for parent. If parent is configured then use that parent.
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for _, op := range o {
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op(&opts)
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}
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// TODO: [rghetia] ChildOfRelationship is used to indicate that the parent is remote
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// and its context is received as part of a request. There are two possibilities
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// 1. Remote is trusted. So continue using same trace.
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// tracer.Start(ctx, "some name", ChildOf(remote_span_context))
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// 2. Remote is not trusted. In this case create a root span and then add the remote as link
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// span := tracer.Start(ctx, "some name")
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// span.Link(remote_span_context, ChildOfRelationship)
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if opts.Reference.SpanContext != core.EmptySpanContext() &&
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opts.Reference.RelationshipType == apitrace.ChildOfRelationship {
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parent = opts.Reference.SpanContext
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remoteParent = true
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} else {
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if p := apitrace.CurrentSpan(ctx); p != nil {
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if sdkSpan, ok := p.(*span); ok {
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sdkSpan.addChild()
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parent = sdkSpan.spanContext
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}
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}
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}
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span := startSpanInternal(name, parent, remoteParent, opts)
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span.tracer = tr
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if span.IsRecordingEvents() {
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sps, _ := spanProcessors.Load().(spanProcessorMap)
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for sp := range sps {
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sp.OnStart(span.data)
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}
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}
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ctx, end := startExecutionTracerTask(ctx, name)
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span.executionTracerTaskEnd = end
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return apitrace.SetCurrentSpan(ctx, span), span
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}
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func (tr *tracer) WithSpan(ctx context.Context, name string, body func(ctx context.Context) error) error {
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ctx, span := tr.Start(ctx, name)
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defer span.Finish()
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if err := body(ctx); err != nil {
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// TODO: set event with boolean attribute for error.
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return err
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}
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return nil
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}
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func (tr *tracer) WithService(name string) apitrace.Tracer {
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tr.name = name
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return tr
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}
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// WithResources does nothing and returns noop implementation of apitrace.Tracer.
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func (tr *tracer) WithResources(res ...core.KeyValue) apitrace.Tracer {
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tr.resources = res
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return tr
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}
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// WithComponent does nothing and returns noop implementation of apitrace.Tracer.
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func (tr *tracer) WithComponent(component string) apitrace.Tracer {
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tr.component = component
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return tr
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}
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