Package org.springframework.cloud.sleuth.annotation

Annotation Type SpanTag

@Retention(RUNTIME) @Inherited @Target(PARAMETER) public @interface SpanTag
There are 3 different ways to add tags to a span. All of them are controlled by the annotation values. Precedence is: try with the TagValueResolver bean if the value of the bean wasn't set, try to evaluate a SPEL expression if there’s no SPEL expression just return a toString() value of the parameter
Since:
1.2.0
Author:
Christian Schwerdtfeger

  • Element Details

    • value

      @AliasFor("key") String value
      Returns:
      - The name of the key of the tag which should be created.
      Default:
      ""

    • key

      @AliasFor("value") String key
      Returns:
      - The name of the key of the tag which should be created.
      Default:
      ""

    • expression

      String expression
      Returns:
      - Execute this SPEL expression to calculate the tag value. Will be analyzed if no value of the resolver() was set.
      Default:
      ""

    • resolver

      Class<? extends TagValueResolver> resolver
      Returns:
      - Use this bean to resolve the tag value. Has the highest precedence.
      Default:
      org.springframework.cloud.sleuth.annotation.NoOpTagValueResolver.class