1 /*
2 * JBoss, Home of Professional Open Source.
3 * Copyright 2008, Red Hat Middleware LLC, and individual contributors
4 * as indicated by the @author tags. See the copyright.txt file in the
5 * distribution for a full listing of individual contributors.
6 *
7 * This is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU Lesser General Public License as
9 * published by the Free Software Foundation; either version 2.1 of
10 * the License, or (at your option) any later version.
11 *
12 * This software is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this software; if not, write to the Free
19 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21 */
22 package org.jboss.ha.singleton;
23
24 import org.jboss.ha.jmx.HAServiceMBean;
25
26 /**
27 * HA-Singleton interface.
28 * Only one mbean is active at any point in time, cluster-wide.
29 * <p>
30 * The service provides a simple way for a concrete mbean to detect whether
31 * or not it is the active one in the cluster.
32 * <p>
33 * Concrete mbeans would usually do activities like regular clean up of database tables
34 * or saving statistics about cluster usage.
35 *
36 * Replaced by {@link org.jboss.ha.framework.interfaces.HASingletonMBean}
37 *
38 * @author <a href="mailto:ivelin@apache.org">Ivelin Ivanov</a>
39 * @author <a href="mailto:dimitris@jboss.org">Dimitris Andreadis</a>
40 * @version $Revision: 81001 $
41 */
42 @Deprecated
43 public interface HASingletonMBean extends HAServiceMBean, org.jboss.ha.framework.interfaces.HASingletonMBean
44 {
45 // Constants -----------------------------------------------------
46
47 /** Notifications emitted locally by an HASingleton to indicate state transitions */
48 String HASINGLETON_STARTING_NOTIFICATION = "org.jboss.ha.singleton.starting";
49 String HASINGLETON_STARTED_NOTIFICATION = "org.jboss.ha.singleton.started";
50 String HASINGLETON_STOPPING_NOTIFICATION = "org.jboss.ha.singleton.stopping";
51 String HASINGLETON_STOPPED_NOTIFICATION = "org.jboss.ha.singleton.stopped";
52 }
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