Платформа ЦРНП "Мирокод" для разработки проектов
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70 lines
2.1 KiB
70 lines
2.1 KiB
// 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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/* |
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Package trace provides an implementation of the tracing part of the |
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OpenTelemetry API. |
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This package is currently in a pre-GA phase. Backwards incompatible changes |
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may be introduced in subsequent minor version releases as we work to track the |
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evolving OpenTelemetry specification and user feedback. |
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To participate in distributed traces a Span needs to be created for the |
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operation being performed as part of a traced workflow. It its simplest form: |
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var tracer trace.Tracer |
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func init() { |
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tracer = otel.Tracer("instrumentation/package/name") |
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} |
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func operation(ctx context.Context) { |
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var span trace.Span |
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ctx, span = tracer.Start(ctx, "operation") |
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defer span.End() |
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// ... |
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} |
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A Tracer is unique to the instrumentation and is used to create Spans. |
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Instrumentation should be designed to accept a TracerProvider from which it |
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can create its own unique Tracer. Alternatively, the registered global |
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TracerProvider from the go.opentelemetry.io/otel package can be used as |
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a default. |
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const ( |
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name = "instrumentation/package/name" |
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version = "0.1.0" |
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) |
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type Instrumentation struct { |
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tracer trace.Tracer |
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} |
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func NewInstrumentation(tp trace.TracerProvider) *Instrumentation { |
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if tp == nil { |
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tp = otel.TracerProvider() |
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} |
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return &Instrumentation{ |
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tracer: tp.Tracer(name, trace.WithInstrumentationVersion(version)), |
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} |
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} |
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func operation(ctx context.Context, inst *Instrumentation) { |
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var span trace.Span |
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ctx, span = inst.tracer.Start(ctx, "operation") |
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defer span.End() |
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// ... |
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} |
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*/ |
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package trace // import "go.opentelemetry.io/otel/trace"
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