001 /* ActivationMonitor.java -- the RMI activation/inactivation event listener
002 Copyright (c) 1996, 1997, 1998, 1999, 2004, 2006
003 Free Software Foundation, Inc.
004
005 This file is part of GNU Classpath.
006
007 GNU Classpath is free software; you can redistribute it and/or modify
008 it under the terms of the GNU General Public License as published by
009 the Free Software Foundation; either version 2, or (at your option)
010 any later version.
011
012 GNU Classpath is distributed in the hope that it will be useful, but
013 WITHOUT ANY WARRANTY; without even the implied warranty of
014 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
015 General Public License for more details.
016
017 You should have received a copy of the GNU General Public License
018 along with GNU Classpath; see the file COPYING. If not, write to the
019 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
020 02110-1301 USA.
021
022 Linking this library statically or dynamically with other modules is
023 making a combined work based on this library. Thus, the terms and
024 conditions of the GNU General Public License cover the whole
025 combination.
026
027 As a special exception, the copyright holders of this library give you
028 permission to link this library with independent modules to produce an
029 executable, regardless of the license terms of these independent
030 modules, and to copy and distribute the resulting executable under
031 terms of your choice, provided that you also meet, for each linked
032 independent module, the terms and conditions of the license of that
033 module. An independent module is a module which is not derived from
034 or based on this library. If you modify this library, you may extend
035 this exception to your version of the library, but you are not
036 obligated to do so. If you do not wish to do so, delete this
037 exception statement from your version. */
038
039
040 package java.rmi.activation;
041
042 import java.rmi.MarshalledObject;
043 import java.rmi.Remote;
044 import java.rmi.RemoteException;
045
046 /**
047 * The activation and inactivation event listener. The group obtains this
048 * listener via {@link ActivationSystem#activeGroup} and must notify it
049 * when the group objects are activated or inactivated and also when the
050 * whole group becomes inactive.
051 * @author root.
052 */
053 public interface ActivationMonitor extends Remote
054 {
055 /**
056 * Informs that the object is now active.
057 *
058 * @param id the activation id of the object that is now active
059 * @throws UnknownObjectException is such object is not known in this group
060 * @throws RemoteException if remote call fails
061 */
062 void activeObject (ActivationID id, MarshalledObject<? extends Remote> obj)
063 throws UnknownObjectException, RemoteException;
064
065 /**
066 * Informs that the object is not inactive.
067 *
068 * @param id the activation id of the object that is now inactive
069 * @throws UnknownObjectException is such object is not known in this group
070 * @throws RemoteException if remote call fails
071 */
072 void inactiveObject (ActivationID id)
073 throws UnknownObjectException, RemoteException;
074
075 /**
076 * Informs that the whole group is now inactive because all group objects are
077 * inactive. The group will be recreated upon the later request to activate
078 * any object, belonging to the group.
079 *
080 * @param groupId the group id
081 * @param incarnation the group incarnation number
082 * @throws UnknownGroupException if the group id is not known
083 * @throws RemoteException if the remote call fails
084 */
085 void inactiveGroup (ActivationGroupID groupId, long incarnation)
086 throws UnknownGroupException, RemoteException;
087 }