# Package org.apache.storm.hooks

- Interface Summary
  Interface | Description
  --- | ---
  ITaskHook |
  IWorkerHook | An IWorkerHook represents a topology component that can be executed when a worker starts, and when a worker shuts down.

- Class Summary
  Class | Description
  --- | ---
  BaseTaskHook |
  BaseWorkerHook | A BaseWorkerHook is a noop implementation of IWorkerHook.

- Exception Summary
  Exception | Description
  --- | ---
  SubmitterHookException | This Exception is thrown when registered `ISubmitterHook` could not be initialized or invoked.