SettingDefinition (Java SE 11 & JDK 11 )
Keywords: jdk.jfr.SettingDefinition class

Module jdk.jfr
Package jdk.jfr

## Annotation Type SettingDefinition

-     @Retention(RUNTIME)
      @Target(METHOD)
      public @interface SettingDefinition

  Annotation that specifies that a method in an event class should be used to filter out events.

  For the method to be valid it must return a `SettingControl` and only have one parameter, which should be a non-abstract subclass of `SettingControl`

  The return value of the method specifies whether the event is to be written to the Flight Recorder system or not.

  The following example shows how to annotate a method in an event class.

       class HelloWorld extend Event {

         @Label("Message");
         String message;

         @SettingDefinition;
         @Label("Message Filter");
         public boolean filter(RegExpControl regExp) {
           return regExp.matches(message);
         }
       }

  For an example of how the setting controls are defined, see `SettingControl`.
  Since:
    9
  See Also:
    `SettingControl`