BatchSender.java

package ch.usi.da.smr;
/* 
 * Copyright (c) 2013 Università della Svizzera italiana (USI)
 * 
 * This file is part of URingPaxos.
 *
 * URingPaxos 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.
 *
 * URingPaxos 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 URingPaxos.  If not, see <http://www.gnu.org/licenses/>.
 */

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.TimeUnit;

import org.apache.log4j.Logger;
import org.apache.thrift.transport.TTransportException;
import org.apache.zookeeper.KeeperException;

import ch.usi.da.smr.message.Command;
import ch.usi.da.smr.message.Message;
import ch.usi.da.smr.transport.Response;

/**
 * Name: BatchSender<br>
 * Description: <br>
 * 
 * Creation date: Nov 29, 2013<br>
 * $Id$
 * 
 * @author Samuel Benz benz@geoid.ch
 */
public class BatchSender implements Runnable {
	
	private final static Logger logger = Logger.getLogger(BatchSender.class);

	//private final ABSender sender;
	
	private final Client client;
	
	private final BlockingQueue<Response> queue;
	
	private final int batch_size = 8912; // 0: disable
	
	private final int partition;
	
	public BatchSender(int partition, Client client) throws TTransportException, IOException, KeeperException, InterruptedException {
		this.client = client;
		this.partition = partition;
		queue = client.getSendQueues().get(partition);
	}
	
	@Override
	public void run() {
		while(true){
			try {
				Response r = queue.take();
				if(r.isControl()){
					Message m = new Message(1,client.getIp().getHostAddress() + ";" + client.getPort(),"",null);
					m.setControl(r.getControl());
					client.getPartitions().sendPartition(partition,m);
				}else{
					List<Command> cmds = new ArrayList<Command>();
					int size = r.getCommand().getValue().length;
					cmds.add(r.getCommand());
					if(batch_size > 0){
						while((r = queue.poll(500,TimeUnit.MICROSECONDS)) != null){ 
							cmds.add(r.getCommand());
							size = size + r.getCommand().getValue().length;
							if(size >= batch_size){
								break;
							}
						}
						logger.debug("BatchSender composed #cmd " + cmds.size() + " with size " + size + " bytes.");
					}
					Message m = new Message(1,client.getIp().getHostAddress() + ";" + client.getPort(),"",cmds);
					client.getPartitions().sendPartition(partition,m);
				}
			} catch (Exception e) {
				e.printStackTrace();
				Thread.currentThread().interrupt();
				break;				
			}
		}
	}

}