001/* Activator.java -- 002 Copyright (c) 1996, 1997, 1998, 1999, 2004 Free Software Foundation, Inc. 003 004This file is part of GNU Classpath. 005 006GNU Classpath is free software; you can redistribute it and/or modify 007it under the terms of the GNU General Public License as published by 008the Free Software Foundation; either version 2, or (at your option) 009any later version. 010 011GNU Classpath is distributed in the hope that it will be useful, but 012WITHOUT ANY WARRANTY; without even the implied warranty of 013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014General Public License for more details. 015 016You should have received a copy of the GNU General Public License 017along with GNU Classpath; see the file COPYING. If not, write to the 018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 01902110-1301 USA. 020 021Linking this library statically or dynamically with other modules is 022making a combined work based on this library. Thus, the terms and 023conditions of the GNU General Public License cover the whole 024combination. 025 026As a special exception, the copyright holders of this library give you 027permission to link this library with independent modules to produce an 028executable, regardless of the license terms of these independent 029modules, and to copy and distribute the resulting executable under 030terms of your choice, provided that you also meet, for each linked 031independent module, the terms and conditions of the license of that 032module. An independent module is a module which is not derived from 033or based on this library. If you modify this library, you may extend 034this exception to your version of the library, but you are not 035obligated to do so. If you do not wish to do so, delete this 036exception statement from your version. */ 037 038 039package java.rmi.activation; 040 041import java.rmi.MarshalledObject; 042import java.rmi.Remote; 043import java.rmi.RemoteException; 044 045/** 046 * Activates remote object, providing the live reference to the activable remote 047 * object. Usually there is only one activator per host. 048 * 049 * @see ActivationSystem 050 * @see ActivationMonitor 051 */ 052public interface Activator 053 extends Remote 054{ 055 /** 056 * Activate the object, associated with the given activation identifier. The 057 * activator looks for the {@link ActivationDesc}riptor for the passed 058 * identifier, determines the object activation group and initiates object 059 * recreation either via {@link ActivationInstantiator} or via 060 * {@link Class#newInstance()}. 061 * 062 * @param id the identifier of the object to activate. 063 * @param force if true, the activator always contacts the group to obtain the 064 * reference. If false, it may return the cached value. 065 * @return the activated remote object (its stub). 066 * @throws UnknownObjectException if the object with this id is unknown 067 * @throws ActivationException if the activation has failed due other reason 068 * @throws RemoteException if the remote call has failed. 069 */ 070 MarshalledObject<? extends Remote> activate (ActivationID id, boolean force) 071 throws ActivationException, UnknownObjectException, RemoteException; 072}