SpringCloud/spring-cloud-sleuth
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Merge branch '2.2.x'

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Adrian Cole
2020-05-16 15:15:37 +08:00
parent 9ec405314f b1d39ce291
commit 8ae5e13d31
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docs/src/main/asciidoc/spring-cloud-sleuth.adoc
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@@ -520,17 +520,17 @@ spring.zipkin.service.name: myService
=== Customization of Reported Spans
Before reporting spans (for example, to Zipkin) you may want to modify that span in some way.
You can do so by using the `FinishedSpanHandler` interface.
You can do so by implementing a `SpanHandler`.
In Sleuth, we generate spans with a fixed name.
Some users want to modify the name depending on values of tags.
You can implement the `FinishedSpanHandler` interface to alter that name.
You can implement the `SpanHandler` interface to alter that name.
The following example shows how to register two beans that implement `FinishedSpanHandler`:
The following example shows how to register two beans that implement `SpanHandler`:
[source,java]
----
include::{project-root}//spring-cloud-sleuth-core/src/test/java/org/springframework/cloud/sleuth/FinishedSpanHandlerTests.java[tags=finishedSpanHandler,indent=0]
include::{project-root}//spring-cloud-sleuth-core/src/test/java/org/springframework/cloud/sleuth/SpanHandlerTests.java[tags=spanHandler,indent=0]
----
The preceding example results in changing the name of the reported span to `foo bar`, just before it gets reported (for example, to Zipkin).