1 /*
2 * Copyright (c) 1998-2002 The Jgroup Team.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU Lesser General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU Lesser General Public License for more details.
12 *
13 * You should have received a copy of the GNU Lesser General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
16 *
17 */
18
19 package jgroup.relacs.gm;
20
21 import java.rmi.Remote;
22 import java.rmi.RemoteException;
23
24 /**
25 * The <code>PingListener</code> interface is a remote interface used
26 * by the daemon to periodically poll a remote member object to verify
27 * if it is still active or has crashed.
28 *
29 * @author Alberto Montresor
30 * @since Jgroup 1.2
31 */
32 public interface PingListener
33 extends Remote
34 {
35
36 /**
37 * This method is invoked periodically by the daemon to verify whether a
38 * remote member object is still active or has crashed. If a remote
39 * exception is thrown, this means that the member has crashed.
40 */
41 public void ping()
42 throws RemoteException;
43
44 } // END PingListener
45