org.springframework.cloud.sleuth

Annotation Type SpanName

@Target(value={TYPE,METHOD})
 @Retention(value=RUNTIME)
 @Documented
public @interface SpanName

Annotation to provide the name for the span. You should annotate all your custom Runnable or Callable classes for the instrumentation logic to pick up how to name the span.

Having for example the following code

     @SpanName("custom-operation")
     class CustomRunnable implements Runnable {
         @Override
         public void run() {
          // latency of this method will be recorded in a span named "custom-operation"
         }
      }
 

Will result in creating a span with name custom-operation.

When there's no @SpanName annotation, toString is used. Here's an example of the above, but via an anonymous instance.

     return new Runnable() {
          -- snip --

          @Override
          public String toString() {
              return "custom-operation";
          }
     };
 

Starting with version 1.3.0 you can also put the annotation on an Async annotated method and the value of that annotation will be used as the span name.

Since:

1.0.0

Author:

Marcin Grzejszczak

Required Element Summary

Required Elements

Modifier and Type	Required Element and Description
String	value Name of the span to be resolved at runtime.

Element Detail

value

public abstract String value

Name of the span to be resolved at runtime.

Returns:

- value of the span name.