mirror of https://github.com/docker/cli.git
90 lines
2.7 KiB
Go
90 lines
2.7 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 trace // import "go.opentelemetry.io/otel/trace"
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import (
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"context"
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"go.opentelemetry.io/otel/attribute"
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"go.opentelemetry.io/otel/codes"
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)
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// NewNoopTracerProvider returns an implementation of TracerProvider that
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// performs no operations. The Tracer and Spans created from the returned
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// TracerProvider also perform no operations.
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func NewNoopTracerProvider() TracerProvider {
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return noopTracerProvider{}
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}
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type noopTracerProvider struct{}
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var _ TracerProvider = noopTracerProvider{}
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// Tracer returns noop implementation of Tracer.
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func (p noopTracerProvider) Tracer(string, ...TracerOption) Tracer {
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return noopTracer{}
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}
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// noopTracer is an implementation of Tracer that preforms no operations.
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type noopTracer struct{}
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var _ Tracer = noopTracer{}
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// Start carries forward a non-recording Span, if one is present in the context, otherwise it
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// creates a no-op Span.
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func (t noopTracer) Start(ctx context.Context, name string, _ ...SpanStartOption) (context.Context, Span) {
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span := SpanFromContext(ctx)
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if _, ok := span.(nonRecordingSpan); !ok {
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// span is likely already a noopSpan, but let's be sure
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span = noopSpan{}
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}
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return ContextWithSpan(ctx, span), span
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}
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// noopSpan is an implementation of Span that preforms no operations.
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type noopSpan struct{}
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var _ Span = noopSpan{}
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// SpanContext returns an empty span context.
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func (noopSpan) SpanContext() SpanContext { return SpanContext{} }
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// IsRecording always returns false.
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func (noopSpan) IsRecording() bool { return false }
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// SetStatus does nothing.
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func (noopSpan) SetStatus(codes.Code, string) {}
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// SetError does nothing.
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func (noopSpan) SetError(bool) {}
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// SetAttributes does nothing.
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func (noopSpan) SetAttributes(...attribute.KeyValue) {}
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// End does nothing.
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func (noopSpan) End(...SpanEndOption) {}
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// RecordError does nothing.
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func (noopSpan) RecordError(error, ...EventOption) {}
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// AddEvent does nothing.
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func (noopSpan) AddEvent(string, ...EventOption) {}
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// SetName does nothing.
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func (noopSpan) SetName(string) {}
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// TracerProvider returns a no-op TracerProvider.
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func (noopSpan) TracerProvider() TracerProvider { return noopTracerProvider{} }
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