# Class Callbacks

java.lang.Object
com.google.adk.a2a.executor.Callbacks

public final class Callbacks extends Object
Functional interfaces for agent executor lifecycle callbacks.

- ## Nested Class Summary

  Nested Classes
  Modifier and Type
  Class
  Description
  `static interface`
  `Callbacks.AfterEventCallback`
  Async callback interface for actions to be performed after an event is processed.
  `static interface`
  `Callbacks.AfterExecuteCallback`
  Async callback interface for actions to be performed after an execution is completed or failed.
  `static interface`
  `Callbacks.BeforeExecuteCallback`
  Async callback interface for actions to be performed before an execution is started.

- ## Method Summary

  ### Methods inherited from class Object

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