# Uses of Package
java.rmi.activation

- Packages that use java.rmi.activation
  Package | Description
  --- | ---
  java.rmi.activation | Provides support for RMI Object Activation.

- Classes in java.rmi.activation used by java.rmi.activation
  Class and Description
  ActivationDesc An activation descriptor contains the information necessary to activate an object: the object's group identifier, the object's fully-qualified class name, the object's code location (the location of the class), a codebase URL path, the object's restart "mode", and, a "marshalled" object that can contain object specific initialization data.
  ActivationException General exception used by the activation interfaces.
  ActivationGroup An `ActivationGroup` is responsible for creating new instances of "activatable" objects in its group, informing its `ActivationMonitor` when either: its object's become active or inactive, or the group as a whole becomes inactive.
  ActivationGroupDesc An activation group descriptor contains the information necessary to create/recreate an activation group in which to activate objects.
  ActivationGroupDesc.CommandEnvironment Startup options for ActivationGroup implementations.
  ActivationGroupID The identifier for a registered activation group serves several purposes: identifies the group uniquely within the activation system, and contains a reference to the group's activation system so that the group can contact its activation system when necessary.
  ActivationID Activation makes use of special identifiers to denote remote objects that can be activated over time.
  ActivationInstantiator An `ActivationInstantiator` is responsible for creating instances of "activatable" objects.
  ActivationMonitor An `ActivationMonitor` is specific to an `ActivationGroup` and is obtained when a group is reported active via a call to `ActivationSystem.activeGroup` (this is done internally).
  ActivationSystem The `ActivationSystem` provides a means for registering groups and "activatable" objects to be activated within those groups.
  Activator The `Activator` facilitates remote object activation.
  UnknownGroupException An `UnknownGroupException` is thrown by methods of classes and interfaces in the `java.rmi.activation` package when the `ActivationGroupID` parameter to the method is determined to be invalid, i.e., not known by the `ActivationSystem`.
  UnknownObjectException An `UnknownObjectException` is thrown by methods of classes and interfaces in the `java.rmi.activation` package when the `ActivationID` parameter to the method is determined to be invalid.

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