mirror of
https://github.com/open-telemetry/opentelemetry-go.git
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d18c135f58
* Add internal pkg to bridge/opencensus * Use the bridge/opencensus/internal pkg * Correct testing comments * Remove added unit tests
70 lines
2.5 KiB
Go
70 lines
2.5 KiB
Go
// Copyright The 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 internal
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import (
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"context"
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"fmt"
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octrace "go.opencensus.io/trace"
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"go.opentelemetry.io/otel/bridge/opencensus/internal/oc2otel"
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"go.opentelemetry.io/otel/trace"
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)
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// Tracer is an OpenCensus Tracer that wraps an OpenTelemetry Tracer.
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type Tracer struct {
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otelTracer trace.Tracer
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}
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// NewTracer returns an OpenCensus Tracer that wraps the OpenTelemetry tracer.
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func NewTracer(tracer trace.Tracer) octrace.Tracer {
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return &Tracer{otelTracer: tracer}
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}
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// StartSpan starts a new child span of the current span in the context. If
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// there is no span in the context, it creates a new trace and span.
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func (o *Tracer) StartSpan(ctx context.Context, name string, s ...octrace.StartOption) (context.Context, *octrace.Span) {
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otelOpts, err := oc2otel.StartOptions(s)
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if err != nil {
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Handle(fmt.Errorf("starting span %q: %w", name, err))
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}
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ctx, sp := o.otelTracer.Start(ctx, name, otelOpts...)
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return ctx, NewSpan(sp)
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}
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// StartSpanWithRemoteParent starts a new child span of the span from the
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// given parent.
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func (o *Tracer) StartSpanWithRemoteParent(ctx context.Context, name string, parent octrace.SpanContext, s ...octrace.StartOption) (context.Context, *octrace.Span) {
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// make sure span context is zero'd out so we use the remote parent
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ctx = trace.ContextWithSpan(ctx, nil)
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ctx = trace.ContextWithRemoteSpanContext(ctx, oc2otel.SpanContext(parent))
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return o.StartSpan(ctx, name, s...)
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}
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// FromContext returns the Span stored in a context.
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func (o *Tracer) FromContext(ctx context.Context) *octrace.Span {
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return NewSpan(trace.SpanFromContext(ctx))
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}
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// NewContext returns a new context with the given Span attached.
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func (o *Tracer) NewContext(parent context.Context, s *octrace.Span) context.Context {
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if otSpan, ok := s.Internal().(*Span); ok {
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return trace.ContextWithSpan(parent, otSpan.otelSpan)
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}
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Handle(fmt.Errorf("unable to create context with span %q, since it was created using a different tracer", s.String()))
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return parent
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}
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