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109 lines
3.5 KiB
109 lines
3.5 KiB
/*
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* Copyright (c) 1997, 2005, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*/
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package java.rmi.activation;
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import java.rmi.MarshalledObject;
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import java.rmi.Remote;
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import java.rmi.RemoteException;
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import java.rmi.activation.UnknownGroupException;
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import java.rmi.activation.UnknownObjectException;
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/**
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* An <code>ActivationMonitor</code> is specific to an
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* <code>ActivationGroup</code> and is obtained when a group is
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* reported active via a call to
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* <code>ActivationSystem.activeGroup</code> (this is done
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* internally). An activation group is responsible for informing its
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* <code>ActivationMonitor</code> when either: its objects become active or
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* inactive, or the group as a whole becomes inactive.
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*
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* @author Ann Wollrath
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* @see Activator
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* @see ActivationSystem
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* @see ActivationGroup
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* @since 1.2
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*/
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public interface ActivationMonitor extends Remote {
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/**
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* An activation group calls its monitor's
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* <code>inactiveObject</code> method when an object in its group
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* becomes inactive (deactivates). An activation group discovers
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* that an object (that it participated in activating) in its VM
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* is no longer active, via calls to the activation group's
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* <code>inactiveObject</code> method. <p>
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*
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* The <code>inactiveObject</code> call informs the
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* <code>ActivationMonitor</code> that the remote object reference
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* it holds for the object with the activation identifier,
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* <code>id</code>, is no longer valid. The monitor considers the
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* reference associated with <code>id</code> as a stale reference.
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* Since the reference is considered stale, a subsequent
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* <code>activate</code> call for the same activation identifier
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* results in re-activating the remote object.<p>
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*
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* @param id the object's activation identifier
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* @exception UnknownObjectException if object is unknown
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* @exception RemoteException if remote call fails
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* @since 1.2
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*/
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public void inactiveObject(ActivationID id)
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throws UnknownObjectException, RemoteException;
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/**
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* Informs that an object is now active. An <code>ActivationGroup</code>
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* informs its monitor if an object in its group becomes active by
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* other means than being activated directly (i.e., the object
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* is registered and "activated" itself).
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*
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* @param id the active object's id
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* @param obj the marshalled form of the object's stub
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* @exception UnknownObjectException if object is unknown
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* @exception RemoteException if remote call fails
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* @since 1.2
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*/
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public void activeObject(ActivationID id,
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MarshalledObject<? extends Remote> obj)
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throws UnknownObjectException, RemoteException;
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/**
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* Informs that the group is now inactive. The group will be
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* recreated upon a subsequent request to activate an object
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* within the group. A group becomes inactive when all objects
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* in the group report that they are inactive.
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*
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* @param id the group's id
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* @param incarnation the group's incarnation number
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* @exception UnknownGroupException if group is unknown
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* @exception RemoteException if remote call fails
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* @since 1.2
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*/
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public void inactiveGroup(ActivationGroupID id,
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long incarnation)
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throws UnknownGroupException, RemoteException;
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}
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