org.springframework.cloud.sleuth.instrument.messaging

Class HeaderBasedMessagingExtractor

java.lang.Object

org.springframework.cloud.sleuth.instrument.messaging.HeaderBasedMessagingExtractor

All Implemented Interfaces:

MessagingSpanTextMapExtractor, SpanExtractor<SpanTextMap>

public class HeaderBasedMessagingExtractor
extends Object
implements MessagingSpanTextMapExtractor

Default implementation for messaging

Since:

1.2.0

Author:

Marcin Grzejszczak

Constructor Summary

Constructors

Constructor and Description
HeaderBasedMessagingExtractor()

Method Summary

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

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

HeaderBasedMessagingExtractor

public HeaderBasedMessagingExtractor()

Method Detail

joinTrace

public Span joinTrace(SpanTextMap textMap)

Description copied from interface: SpanExtractor

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).

Specified by:

joinTrace in interface SpanExtractor<SpanTextMap>