mirror of https://github.com/prometheus/prometheus
33 lines
1.1 KiB
Go
33 lines
1.1 KiB
Go
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package opentracing
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var (
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globalTracer Tracer = NoopTracer{}
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)
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// SetGlobalTracer sets the [singleton] opentracing.Tracer returned by
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// GlobalTracer(). Those who use GlobalTracer (rather than directly manage an
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// opentracing.Tracer instance) should call SetGlobalTracer as early as
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// possible in main(), prior to calling the `StartSpan` global func below.
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// Prior to calling `SetGlobalTracer`, any Spans started via the `StartSpan`
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// (etc) globals are noops.
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func SetGlobalTracer(tracer Tracer) {
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globalTracer = tracer
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}
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// GlobalTracer returns the global singleton `Tracer` implementation.
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// Before `SetGlobalTracer()` is called, the `GlobalTracer()` is a noop
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// implementation that drops all data handed to it.
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func GlobalTracer() Tracer {
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return globalTracer
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}
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// StartSpan defers to `Tracer.StartSpan`. See `GlobalTracer()`.
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func StartSpan(operationName string, opts ...StartSpanOption) Span {
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return globalTracer.StartSpan(operationName, opts...)
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}
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// InitGlobalTracer is deprecated. Please use SetGlobalTracer.
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func InitGlobalTracer(tracer Tracer) {
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SetGlobalTracer(tracer)
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}
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