MixPacketLevelHandlerBlocking.java

/*******************************************************************************
 * gMix open source project - https://svs.informatik.uni-hamburg.de/gmix/
 * Copyright (C) 2014  SVS
 *
 * 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 userGeneratedContent.testbedPlugIns.layerPlugIns.layer5application.loadGeneratorPlugIn_v0_001;

import java.util.Random;

import staticContent.framework.AnonNode;
import staticContent.framework.routing.RoutingMode;
import staticContent.framework.socket.datagram.DatagramAnonServerSocketImpl;
import staticContent.framework.socket.socketInterfaces.AnonMessage;
import staticContent.framework.socket.socketInterfaces.AnonSocketOptions.CommunicationDirection;
import staticContent.framework.socket.socketInterfaces.NoneBlockingAnonSocketOptions.IO_Mode;


public class MixPacketLevelHandlerBlocking {

	private DatagramAnonServerSocketImpl socket;
	private AnonNode owner;
	private final boolean IS_DUPLEX;
	
	
	public MixPacketLevelHandlerBlocking(AnonNode anonNode) {
		System.out.println("MixPacketLevelHandler started"); 
		this.owner = anonNode;
		this.IS_DUPLEX = anonNode.IS_DUPLEX;
		CommunicationDirection cd = IS_DUPLEX ? CommunicationDirection.DUPLEX : CommunicationDirection.SIMPLEX_RECEIVER;
		IO_Mode ioMode = IO_Mode.BLOCKING;
		this.socket = (DatagramAnonServerSocketImpl) anonNode.createDatagramServerSocket(
				owner.getSettings().getPropertyAsInt("SERVICE_PORT1"), 
				cd, 
				ioMode,
				true, 
				true, 
				owner.ROUTING_MODE != RoutingMode.GLOBAL_ROUTING
			);
		new WorkerThread().start();
	}

	
	// TODO: why not use none-blocking mode (observer pattern)?
	private class WorkerThread extends Thread {
		
		private Random random = new Random();
		
		
		@Override
		public void run() {
			while (true) {
				AnonMessage message = socket.receiveMessage();
				//System.out.println("DISTANT_PROXY: received request"); 
				if (IS_DUPLEX) {
					if (message.getByteMessage().length == message.getMaxReplySize()) {
						socket.sendMessage(message);
					} else {
						byte[] replyPayload = new byte[message.getMaxReplySize()];
						random.nextBytes(replyPayload);
						message.setByteMessage(replyPayload);
						socket.sendMessage(message);
					}
						
				}
			}
		}
	}
	
}