/*
* 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.server.core.comm;
import mazz.i18n.Logger;
import org.jboss.remoting.InvokerLocator;
import org.rhq.enterprise.communications.command.server.discovery.AutoDiscoveryListener;
/**
* Listens for new agents coming on and going offline.
*
* @author John Mazzitelli
*/
public class ServerAutoDiscoveryListener implements AutoDiscoveryListener {
/**
* Logger
*/
private static final Logger LOG = ServerI18NFactory.getLogger(ServerAutoDiscoveryListener.class);
/**
* The list to be modified when new agents are seen coming online and old agents going offline.
*/
private final KnownAgents m_agents;
/**
* Constructor for {@link ServerAutoDiscoveryListener}.
*
* @param agents the list that will contain all known agents' remote endpoints
*/
public ServerAutoDiscoveryListener(KnownAgents agents) {
m_agents = agents;
}
/**
* This adds the new agent's <code>locator</code> URL to the list of known agents.
*
* @see AutoDiscoveryListener#serverOnline(InvokerLocator)
*/
public void serverOnline(InvokerLocator locator) {
if (m_agents.addAgent(locator)) {
LOG.debug(ServerI18NResourceKeys.AUTO_DETECTED_NEW_AGENT, locator);
}
return;
}
/**
* This removes the given <code>locator</code> URL from the list of known agents.
*
* @see AutoDiscoveryListener#serverOffline(InvokerLocator)
*/
public void serverOffline(InvokerLocator locator) {
if (m_agents.removeAgent(locator)) {
LOG.debug(ServerI18NResourceKeys.AUTO_DETECTED_DOWNED_AGENT, locator);
}
return;
}
}