ExtractFromHTTPRequest gets a child span of the parent referenced in HTTP request headers.

InfoFromContext returns the traceID and if it was sampled from the Jaeger span found in the given context.

InfoFromSpan returns the traceID and if it was sampled from the span, given it is a jaeger span.

InjectToHTTPRequest adds tracing headers to an HTTP request.

LogError adds a span log for an error.

StartSpanFromContext is an improved opentracing.StartSpanFromContext.

StartSpanFromContextWithOperationName is like StartSpanFromContext, but the caller determines the operation name.

span is a simple wrapper around opentracing.Span in order to get access to the duration of the span for metrics reporting.