/*
* RHQ Management Platform
* Copyright (C) 2005-2008 Red Hat, Inc.
* All rights reserved.
*
* This program 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 version 2 of the License.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
package org.rhq.enterprise.communications.command.server.discovery;
import org.jboss.remoting.InvokerLocator;
import org.rhq.enterprise.communications.ServiceContainer;
/**
* A listener interface that gets notified when the registry of known servers has changed (for example, when new servers
* come online or old servers go down).
*
* @author John Mazzitelli
* @see ServiceContainer#addDiscoveryListener(AutoDiscoveryListener)
*/
public interface AutoDiscoveryListener {
/**
* Invoked when a new server has come online.
*
* @param locator the invoker locator of the new server that has been discovered
*/
void serverOnline(InvokerLocator locator);
/**
* Invoked when an old server has gone offline.
*
* @param locator the invoker locator of the old server that has gone offline
*/
void serverOffline(InvokerLocator locator);
}