/*
* Copyright (c) 2012 Alexander Diener,
*
* 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, either version 3 of the License, or (at your option) any later
* version.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
package de.fhkn.in.uce.relaying.core;
import java.io.IOException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import de.fhkn.in.uce.relaying.message.RelayingLifetime;
import de.fhkn.in.uce.stun.header.STUNMessageClass;
import de.fhkn.in.uce.stun.header.STUNMessageMethod;
import de.fhkn.in.uce.stun.message.Message;
import de.fhkn.in.uce.stun.message.MessageStaticFactory;
import de.fhkn.in.uce.stun.message.MessageWriter;
/**
* Task to refresh the allocation on the relay server.
*
* @author thomas zink, daniel maier, Alexander Diener
* (aldiener@htwg-konstanz.de)
*
*/
final class RefreshAllocationTask implements Runnable {
private static final Logger logger = LoggerFactory.getLogger(RefreshAllocationTask.class);
private final MessageWriter controlConnectionWriter;
private final int lifetime;
/**
* Creates a new {@link RefreshAllocationTask}.
*
* @param controlConnectionWriter
* {@link MessageWriter} of the control connection to the relay
* server
* @param lifetime
* the desired lifetime of the allocation until the next refresh
* request
*/
RefreshAllocationTask(final MessageWriter controlConnectionWriter, final int lifetime) {
this.controlConnectionWriter = controlConnectionWriter;
this.lifetime = lifetime;
}
/**
* Sends a refresh request with the desired lifetime to the relay server.
*/
@Override
public void run() {
try {
final Message refreshRequestMessage = MessageStaticFactory.newSTUNMessageInstance(STUNMessageClass.REQUEST,
STUNMessageMethod.KEEP_ALIVE);
refreshRequestMessage.addAttribute(new RelayingLifetime(this.lifetime));
this.controlConnectionWriter.writeMessage(refreshRequestMessage);
} catch (final IOException e) {
logger.error("IOException while sending refresh request"); //$NON-NLS-1$
}
}
}