/**
* OLAT - Online Learning and Training<br>
* http://www.olat.org
* <p>
* Licensed under the Apache License, Version 2.0 (the "License"); <br>
* you may not use this file except in compliance with the License.<br>
* You may obtain a copy of the License at
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* Unless required by applicable law or agreed to in writing,<br>
* software distributed under the License is distributed on an "AS IS" BASIS, <br>
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. <br>
* See the License for the specific language governing permissions and <br>
* limitations under the License.
* <p>
* Copyright (c) since 2004 at Multimedia- & E-Learning Services (MELS),<br>
* University of Zurich, Switzerland.
* <p>
*/
package org.olat.instantMessaging.syncservice;
import org.jivesoftware.smack.PacketCollector;
import org.jivesoftware.smack.SmackConfiguration;
import org.jivesoftware.smack.XMPPConnection;
import org.jivesoftware.smack.filter.PacketIDFilter;
import org.jivesoftware.smack.packet.IQ;
import org.jivesoftware.smack.provider.ProviderManager;
import org.olat.core.logging.OLog;
import org.olat.core.logging.Tracing;
import org.olat.instantMessaging.AdminUserConnection;
/**
* Description:<br>
* counts IM sessions cluster wide by sending custom xmpp packet to IM server
*
* <P>
* Initial Date: 07.08.2008 <br>
* @author guido
*/
public class RemoteSessionCountOverXMPP implements InstantMessagingSessionCount {
OLog log = Tracing.createLoggerFor(this.getClass());
private int sessionCount = 0;
private AdminUserConnection adminUser;
RemoteSessionCountOverXMPP() {
//register IQ handler
ProviderManager providerMgr = ProviderManager.getInstance();
providerMgr.addIQProvider("query", SessionCount.NAMESPACE, new SessionCount.Provider());
}
public void setConnection(AdminUserConnection adminUser) {
this.adminUser = adminUser;
}
/**
* @see org.olat.instantMessaging.syncservice.IInstantMessagingSessionCount#countSessions()
*/
public int countSessions() {
XMPPConnection con = adminUser.getConnection();
if (con != null && con.isConnected()) {
//TODO:gs may put in other thread???
SessionCount response;
try {
IQ packet = new SessionCount();
packet.setFrom(con.getUser());
PacketCollector collector = con.createPacketCollector(new PacketIDFilter(packet.getPacketID()));
con.sendPacket(packet);
response = (SessionCount) collector.nextResult(SmackConfiguration.getPacketReplyTimeout());
collector.cancel();
if (response == null) {
log.warn("Error while trying to count sessions at IM server. Response was null!");
return sessionCount;
}
if (response.getError() != null) {
log.warn("Error while trying to count sessions at IM server. "+response.getError().getMessage());
return sessionCount;
} else if (response.getType() == IQ.Type.ERROR) {
log.warn("Error while trying to count sessions at IM server");
return sessionCount;
}
sessionCount = response.getNumberOfSessions();
if (sessionCount > 0) return sessionCount-1;
return sessionCount;
} catch (Exception e) {
log.warn("Error while trying to count sessions at IM server. Response was null!", e);
return sessionCount;
}
} return sessionCount;
}
}