/
tracer.go
85 lines (72 loc) · 2.42 KB
/
tracer.go
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// 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 tracetest provides testing utilities for tracing.
package tracetest
import (
"context"
"time"
"go.opentelemetry.io/otel/api/trace"
"go.opentelemetry.io/otel/label"
)
var _ trace.Tracer = (*Tracer)(nil)
// Tracer is an OpenTelemetry Tracer implementation used for testing.
type Tracer struct {
// Name is the instrumentation name.
Name string
// Version is the instrumentation version.
Version string
config *config
}
func (t *Tracer) Start(ctx context.Context, name string, opts ...trace.SpanOption) (context.Context, trace.Span) {
c := trace.SpanConfigure(opts)
startTime := time.Now()
if st := c.Timestamp; !st.IsZero() {
startTime = st
}
span := &Span{
tracer: t,
startTime: startTime,
attributes: make(map[label.Key]label.Value),
links: make(map[trace.SpanContext][]label.KeyValue),
spanKind: c.SpanKind,
}
if c.NewRoot {
span.spanContext = trace.EmptySpanContext()
iodKey := label.Key("ignored-on-demand")
if lsc := trace.SpanFromContext(ctx).SpanContext(); lsc.IsValid() {
span.links[lsc] = []label.KeyValue{iodKey.String("current")}
}
if rsc := trace.RemoteSpanContextFromContext(ctx); rsc.IsValid() {
span.links[rsc] = []label.KeyValue{iodKey.String("remote")}
}
} else {
span.spanContext = t.config.SpanContextFunc(ctx)
if lsc := trace.SpanFromContext(ctx).SpanContext(); lsc.IsValid() {
span.spanContext.TraceID = lsc.TraceID
span.parentSpanID = lsc.SpanID
} else if rsc := trace.RemoteSpanContextFromContext(ctx); rsc.IsValid() {
span.spanContext.TraceID = rsc.TraceID
span.parentSpanID = rsc.SpanID
}
}
for _, link := range c.Links {
span.links[link.SpanContext] = link.Attributes
}
span.SetName(name)
span.SetAttributes(c.Attributes...)
if t.config.SpanRecorder != nil {
t.config.SpanRecorder.OnStart(span)
}
return trace.ContextWithSpan(ctx, span), span
}