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ActivationMonitor.javaAPI DocJava SE 5 API3475Fri Aug 26 14:57:12 BST 2005java.rmi.activation

ActivationMonitor

public interface ActivationMonitor implements Remote
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). An activation group is responsible for informing its ActivationMonitor when either: its objects become active or inactive, or the group as a whole becomes inactive.
author
Ann Wollrath
version
1.15, 12/19/03
see
Activator
see
ActivationSystem
see
ActivationGroup
since
1.2

Fields Summary
Constructors Summary
Methods Summary
public voidactiveObject(ActivationID id, java.rmi.MarshalledObject obj)
Informs that an object is now active. An ActivationGroup informs its monitor if an object in its group becomes active by other means than being activated directly (i.e., the object is registered and "activated" itself).

param
id the active object's id
param
obj the marshalled form of the object's stub
exception
UnknownObjectException if object is unknown
exception
RemoteException if remote call fails
since
1.2

public voidinactiveGroup(ActivationGroupID id, long incarnation)
Informs that the group is now inactive. The group will be recreated upon a subsequent request to activate an object within the group. A group becomes inactive when all objects in the group report that they are inactive.

param
id the group's id
param
incarnation the group's incarnation number
exception
UnknownGroupException if group is unknown
exception
RemoteException if remote call fails
since
1.2

public voidinactiveObject(ActivationID id)
An activation group calls its monitor's inactiveObject method when an object in its group becomes inactive (deactivates). An activation group discovers that an object (that it participated in activating) in its VM is no longer active, via calls to the activation group's inactiveObject method.

The inactiveObject call informs the ActivationMonitor that the remote object reference it holds for the object with the activation identifier, id, is no longer valid. The monitor considers the reference associated with id as a stale reference. Since the reference is considered stale, a subsequent activate call for the same activation identifier results in re-activating the remote object.

param
id the object's activation identifier
exception
UnknownObjectException if object is unknown
exception
RemoteException if remote call fails
since
1.2