/
tracer.go
84 lines (72 loc) · 2.48 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 oteltest // import "github.com/donmstewart/oteltest"
import (
"context"
"time"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/trace"
)
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
}
// Start creates a span. If t is configured with a SpanRecorder its OnStart
// method will be called after the created Span has been initialized.
func (t *Tracer) Start(ctx context.Context, name string, opts ...trace.SpanStartOption) (context.Context, trace.Span) {
c := trace.NewSpanStartConfig(opts...)
startTime := time.Now()
if st := c.Timestamp; !st().IsZero() {
startTime = st()
}
span := &Span{
tracer: t,
startTime: startTime,
attributes: make(map[attribute.Key]attribute.Value),
links: []trace.Link{},
spanKind: c.SpanKind(),
}
if c.NewRoot() {
span.spanContext = trace.SpanContext{}
} else {
span.spanContext = t.config.SpanContextFunc(ctx)
if current := trace.SpanContextFromContext(ctx); current.IsValid() {
span.spanContext = span.spanContext.WithTraceID(current.TraceID())
span.parentSpanID = current.SpanID()
}
}
for _, link := range c.Links() {
for i, sl := range span.links {
if sl.SpanContext.SpanID() == link.SpanContext.SpanID() &&
sl.SpanContext.TraceID() == link.SpanContext.TraceID() &&
sl.SpanContext.TraceFlags() == link.SpanContext.TraceFlags() &&
sl.SpanContext.TraceState().String() == link.SpanContext.TraceState().String() {
span.links[i].Attributes = link.Attributes
break
}
}
span.links = append(span.links, link)
}
span.SetName(name)
span.SetAttributes(c.Attributes()...)
if t.config.SpanRecorder != nil {
t.config.SpanRecorder.OnStart(span)
}
return trace.ContextWithSpan(ctx, span), span
}