mirror of https://github.com/poanetwork/quorum.git
50 lines
994 B
Go
50 lines
994 B
Go
package spancontext
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import (
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"context"
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opentracing "github.com/opentracing/opentracing-go"
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)
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func WithContext(ctx context.Context, sctx opentracing.SpanContext) context.Context {
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return context.WithValue(ctx, "span_context", sctx)
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}
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func FromContext(ctx context.Context) opentracing.SpanContext {
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sctx, ok := ctx.Value("span_context").(opentracing.SpanContext)
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if ok {
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return sctx
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}
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return nil
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}
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func StartSpan(ctx context.Context, name string) (context.Context, opentracing.Span) {
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tracer := opentracing.GlobalTracer()
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sctx := FromContext(ctx)
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var sp opentracing.Span
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if sctx != nil {
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sp = tracer.StartSpan(
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name,
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opentracing.ChildOf(sctx))
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} else {
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sp = tracer.StartSpan(name)
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}
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nctx := context.WithValue(ctx, "span_context", sp.Context())
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return nctx, sp
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}
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func StartSpanFrom(name string, sctx opentracing.SpanContext) opentracing.Span {
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tracer := opentracing.GlobalTracer()
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sp := tracer.StartSpan(
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name,
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opentracing.ChildOf(sctx))
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return sp
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}
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