package ch.usi.da.paxos.ring;
/*
* 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.net.SocketException;
import java.nio.ByteBuffer;
import java.nio.channels.CancelledKeyException;
import java.nio.channels.ClosedChannelException;
import java.nio.channels.SocketChannel;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TransferQueue;
import org.apache.log4j.Logger;
import ch.usi.da.paxos.message.Message;
/**
* Name: TCPSender<br>
* Description: <br>
*
* Creation date: Apr 3, 2013<br>
* $Id$
*
* @author Samuel Benz benz@geoid.ch
*/
public class TCPSender implements Runnable {
private final static Logger logger = Logger.getLogger(TCPSender.class);
private final NetworkManager manager;
private final SocketChannel client;
private final TransferQueue<Message> send_queue;
private final ByteBuffer buffer = ByteBuffer.allocate(524288);
/**
* @param manager
* @throws IOException
*/
public TCPSender(NetworkManager manager,SocketChannel socket,TransferQueue<Message> queue) throws IOException{
this.manager = manager;
this.client = socket;
this.send_queue = queue;
}
@Override
public void run() {
Message m = null;
while(client.isConnected()){
try {
m = send_queue.poll(1000,TimeUnit.SECONDS);
if(m != null){
int lenght = Message.length(m);
if(buffer.remaining() >= lenght+8){
buffer.putInt(NetworkManager.MAGIC_NUMBER);
buffer.putInt(lenght);
Message.toBuffer(buffer, m);
if(manager.crc_32){
buffer.putLong(Message.getCRC32(m));
}
buffer.flip();
client.write(buffer); // client runs in blocking mode !
buffer.compact();
manager.send_count++;
manager.send_bytes = manager.send_bytes + lenght;
}else{
logger.error("TCPSender buffer too small!");
send_queue.add(m);
}
}
} catch (SocketException | ClosedChannelException | CancelledKeyException e ) {
if(m != null){ // put back if already closed
send_queue.add(m);
}
} catch (IOException e) {
logger.error("TCPSender send error",e);
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
break;
}
}
}
}