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/* ActivationMonitor.java -- the RMI activation/inactivation event listener

   Copyright (c) 1996, 1997, 1998, 1999, 2004, 2006

   Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 2, or (at your option)

any later version.

GNU Classpath is distributed in the hope that it will be useful, but

WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

General Public License for more details.

You should have received a copy of the GNU General Public License

along with GNU Classpath; see the file COPYING.  If not, write to the

Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

02110-1301 USA.

Linking this library statically or dynamically with other modules is

making a combined work based on this library.  Thus, the terms and

conditions of the GNU General Public License cover the whole

combination.

As a special exception, the copyright holders of this library give you

permission to link this library with independent modules to produce an

executable, regardless of the license terms of these independent

modules, and to copy and distribute the resulting executable under

terms of your choice, provided that you also meet, for each linked

independent module, the terms and conditions of the license of that

module.  An independent module is a module which is not derived from

or based on this library.  If you modify this library, you may extend

this exception to your version of the library, but you are not

obligated to do so.  If you do not wish to do so, delete this

exception statement from your version. */

package java.rmi.activation;

import java.rmi.MarshalledObject;

import java.rmi.Remote;

import java.rmi.RemoteException;

/**

 * The activation and inactivation event listener. The group obtains this

 * listener via {@link ActivationSystem#activeGroup} and must notify it

 * when the group objects are activated or inactivated and also when the

 * whole group becomes inactive.

 * @author root.

 */

public interface ActivationMonitor extends Remote

{

  /**

   * Informs that the object is now active.

   *

   * @param id the activation id of the object that is now active

   * @throws UnknownObjectException is such object is not known in this group

   * @throws RemoteException if remote call fails

   */

  void activeObject (ActivationID id, MarshalledObject<? extends Remote> obj)

    throws UnknownObjectException, RemoteException;

  /**

   * Informs that the object is not inactive.

   *

   * @param id the activation id of the object that is now inactive

   * @throws UnknownObjectException is such object is not known in this group

   * @throws RemoteException if remote call fails

   */

  void inactiveObject (ActivationID id)

    throws UnknownObjectException, RemoteException;

  /**

   * Informs that the whole group is now inactive because all group objects are

   * inactive. The group will be recreated upon the later request to activate

   * any object, belonging to the group.

   *

   * @param groupId the group id

   * @param incarnation the group incarnation number

   * @throws UnknownGroupException if the group id is not known

   * @throws RemoteException if the remote call fails

   */

  void inactiveGroup (ActivationGroupID groupId, long incarnation)

  throws UnknownGroupException, RemoteException;

}