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Code Issues Releases Activity

Add documentation for tracer.Start() (#1864)

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Signed-off-by: Anthony J Mirabella <a9@aneurysm9.com>
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Anthony Mirabella 2021-04-29 18:22:59 -04:00 committed by GitHub
parent 2bd4840c30
commit 08f4c2707f
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1 changed files with 13 additions and 1 deletions
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trace/trace.go
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@ -638,7 +638,19 @@ func (sk SpanKind) String() string {
// Tracer is the creator of Spans.
type Tracer interface {
// Start creates a span.
// Start creates a span and a context.Context containing the newly-created span.
//
// If the context.Context provided in `ctx` contains a Span then the newly-created
// Span will be a child of that span, otherwise it will be a root span. This behavior
// can be overridden by providing `WithNewRoot()` as a SpanOption, causing the
// newly-created Span to be a root span even if `ctx` contains a Span.
//
// When creating a Span it is recommended to provide all known span attributes using
// the `WithAttributes()` SpanOption as samplers will only have access to the
// attributes provided when a Span is created.
//
// Any Span that is created MUST also be ended. This is the responsibility of the user.
// Implementations of this API may leak memory or other resources if Spans are not ended.
Start(ctx context.Context, spanName string, opts ...SpanOption) (context.Context, Span)
}