/**
* GRANITE DATA SERVICES
* Copyright (C) 2006-2015 GRANITE DATA SERVICES S.A.S.
*
* This file is part of the Granite Data Services Platform.
*
* ***
*
* Community License: GPL 3.0
*
* This file 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 file 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/>.
*
* ***
*
* Available Commercial License: GraniteDS SLA 1.0
*
* This is the appropriate option if you are creating proprietary
* applications and you are not prepared to distribute and share the
* source code of your application under the GPL v3 license.
*
* Please visit http://www.granitedataservices.com/license for more
* details.
*/
package org.granite.gravity.udp;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import org.granite.gravity.GravityInternal;
/**
* @author Franck WOLFF
*/
public class UdpIOChannel extends AbstractUdpChannel {
private DatagramSocket socket = null;
public UdpIOChannel(UdpChannelFactory channelFactory, GravityInternal gravity, DatagramSocket socket) {
this(channelFactory, gravity, socket, null);
}
public UdpIOChannel(UdpChannelFactory channelFactory, GravityInternal gravity, DatagramSocket socket, InetSocketAddress address) {
super(channelFactory, gravity, address);
if ((address == null && !socket.isConnected()) || (address != null && socket.isConnected()))
throw new IllegalArgumentException("Inconsistent arguments");
this.socket = socket;
}
public SocketAddress getClientAddress() {
return (socket.isConnected() ? socket.getRemoteSocketAddress() : address);
}
@Override
public int getServerPort() {
return (socket.isConnected() ? socket.getLocalPort() : address.getPort());
}
public int write(byte[] data, int offset, int length) throws IOException {
int size = length - offset;
if (size > MAX_PACKET_SIZE)
throw new UdpPacketTooLargeException("UDP packet size cannot exceed 64K: " + size);
DatagramPacket packet = (
socket.isConnected() ?
new DatagramPacket(data, offset, length) :
new DatagramPacket(data, offset, length, address)
);
socket.send(packet);
return size;
}
public void close() {
super.close();
try {
if (socket.isConnected())
socket.close();
}
finally {
socket = null;
}
}
}