Interface ActivationMonitor
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- All Superinterfaces:
- Remote
public interface ActivationMonitor extends Remote
AnActivationMonitoris specific to anActivationGroupand is obtained when a group is reported active via a call toActivationSystem.activeGroup(this is done internally). An activation group is responsible for informing itsActivationMonitorwhen either: its objects become active or inactive, or the group as a whole becomes inactive.- Since:
- 1.2
- See Also:
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Activator,ActivationSystem,ActivationGroup
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method and Description voidactiveObject(ActivationID id, MarshalledObject<? extends Remote> obj)Informs that an object is now active.voidinactiveGroup(ActivationGroupID id, long incarnation)Informs that the group is now inactive.voidinactiveObject(ActivationID id)An activation group calls its monitor'sinactiveObjectmethod when an object in its group becomes inactive (deactivates).
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Method Detail
inactiveObject
void inactiveObject(ActivationID id) throws UnknownObjectException, RemoteException
An activation group calls its monitor'sinactiveObjectmethod 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 An activation group discovers that an object (that it participated in activating) in its VM is no longer active, via calls to the activation group'sinactiveObjectmethod.The
inactiveObjectcall informs theActivationMonitorthat the remote object reference it holds for the object with the activation identifier,id, is no longer valid. The monitor considers the reference associated withidas a stale reference. Since the reference is considered stale, a subsequentactivatecall for the same activation identifier results in re-activating the remote object.- Parameters:
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id- the object's activation identifier - Throws:
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UnknownObjectException- if object is unknown -
RemoteException- if remote call fails - Since:
- 1.2
activeObject
void activeObject(ActivationID id, MarshalledObject<? extends Remote> obj) throws UnknownObjectException, RemoteException
Informs that an object is now active. AnActivationGroupinforms 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).- Parameters:
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id- the active object's id -
obj- the marshalled form of the object's stub - Throws:
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UnknownObjectException- if object is unknown -
RemoteException- if remote call fails - Since:
- 1.2
inactiveGroup
void inactiveGroup(ActivationGroupID id, long incarnation) throws UnknownGroupException, RemoteException
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.- Parameters:
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id- the group's id -
incarnation- the group's incarnation number - Throws:
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UnknownGroupException- if group is unknown -
RemoteException- if remote call fails - Since:
- 1.2
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