org.springframework.cloud.sleuth

Interface SpanExtractor<T>

All Known Subinterfaces:

HttpSpanExtractor, MessagingSpanTextMapExtractor

All Known Implementing Classes:

HeaderBasedMessagingExtractor, ZipkinHttpSpanExtractor

public interface SpanExtractor<T>

Adopted from OpenTracing

Since:

1.0.0

Author:

Marcin Grzejszczak

Method Summary

Modifier and Type	Method and Description
Span	joinTrace(T carrier) Returns a SpanBuilder provided a “carrier” object from which to extract identifying information needed by the new Span instance.

Method Detail

joinTrace

Span joinTrace(T carrier)

Returns a SpanBuilder provided a “carrier” object from which to extract identifying information needed by the new Span instance. If the carrier object has no such span stored within it, a new Span is created. Unless there’s an error, it returns a Span. The Span generated from the builder can be used in the host process like any other. (Note that some OpenTracing implementations consider the Spans on either side of an RPC to have the same identity, and others consider the caller to be the parent and the receiver to be the child).