| Interface | Description | 
|---|---|
| ActivationInstantiator | An  ActivationInstantiatoris responsible for creating
 instances of "activatable" objects. | 
| ActivationMonitor | An  ActivationMonitoris specific to anActivationGroupand is obtained when a group is
 reported active via a call toActivationSystem.activeGroup(this is done
 internally). | 
| ActivationSystem | The  ActivationSystemprovides a means for registering
 groups and "activatable" objects to be activated within those groups. | 
| Activator | The  Activatorfacilitates remote object activation. | 
| Class | Description | 
|---|---|
| Activatable | The  Activatableclass provides support for remote
 objects that require persistent access over time and that
 can be activated by the system. | 
| 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. | 
| ActivationGroup | An  ActivationGroupis responsible for creating new
 instances of "activatable" objects in its group, informing itsActivationMonitorwhen either: its object's become
 active or inactive, or the group as a whole becomes inactive. | 
| ActivationGroup_Stub | ActivationGroup_Stubis a stub class
 for the subclasses ofjava.rmi.activation.ActivationGroupthat are exported as ajava.rmi.server.UnicastRemoteObject. | 
| 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. | 
| Exception | Description | 
|---|---|
| ActivateFailedException | This exception is thrown by the RMI runtime when activation
 fails during a remote call to an activatable object. | 
| ActivationException | General exception used by the activation interfaces. | 
| UnknownGroupException | An  UnknownGroupExceptionis thrown by methods of classes and
 interfaces in thejava.rmi.activationpackage when theActivationGroupIDparameter to the method is determined to be
 invalid, i.e., not known by theActivationSystem. | 
| UnknownObjectException | An  UnknownObjectExceptionis thrown by methods of classes and
 interfaces in thejava.rmi.activationpackage when theActivationIDparameter to the method is determined to be
 invalid. | 
Implementations are not required to support the activation
mechanism. If activation is not supported by this implementation,
several specific activation API methods are all required to throw
UnsupportedOperationException. If activation is supported by this
implementation, these methods must never throw UnsupportedOperationException. These methods are denoted by the
presence of an entry for UnsupportedOperationException in the
Throws section of each method's specification.
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