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/**
* A network library for processing which supports UDP, TCP and Multicast.
*
* (c) 2004-2012
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307 USA
*
* @author Andreas Schlegel http://www.sojamo.de
* @modified 12/23/2012
* @version 0.9.9
*/
package netP5;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.UnknownHostException;
public abstract class AbstractUdpServer implements Runnable {
private DatagramSocket _myDatagramSocket = null;
protected UdpPacketListener _myListener;
private Thread _myThread = null;
private int _myPort;
private String _myAddress;
private InetAddress _myInetAddress;
protected int _myDatagramSize = 1536; // common MTU
private boolean isRunning = true;
private boolean isSocket = false;
/**
* create a new UdpServer
*
* @invisible
* @param theListener
* UdpPacketListener
* @param thePort
* int
* @param theBufferSize
* int
*/
public AbstractUdpServer(UdpPacketListener theListener, int thePort,
int theBufferSize) {
_myDatagramSize = theBufferSize;
_myPort = thePort;
_myListener = theListener;
if (_myListener != null) {
start();
}
}
/**
* @invisible
* @param theListener
* UdpPacketListener
* @param theAddress
* String
* @param thePort
* int
* @param theBufferSize
* int
*/
protected AbstractUdpServer(UdpPacketListener theListener,
String theAddress, int thePort, int theBufferSize) {
_myDatagramSize = theBufferSize;
_myAddress = theAddress;
_myPort = thePort;
_myListener = theListener;
if (_myListener != null) {
start();
}
}
/**
* get the datagram socket of the UDP server.
*
* @return DatagramSocket
*/
public DatagramSocket socket() {
return _myDatagramSocket;
}
/**
* @invisible
*
*/
public void start() {
_myThread = null;
_myDatagramSocket = null;
_myThread = new Thread(this);
try {
Thread.sleep(1000);
} catch (InterruptedException iex) {
Logger.printError("UdpServer.start()",
"oscServer sleep interruption " + iex);
}
try {
_myDatagramSocket = new DatagramSocket(_myPort);
_myInetAddress = InetAddress.getByName(_myAddress);
Logger.printProcess("UdpServer.start()",
"new Unicast DatagramSocket created @ port " + _myPort);
} catch (IOException ioex) {
Logger.printError("UdpServer.start()",
" IOException, couldnt create new DatagramSocket @ port "
+ _myPort + " " + ioex);
}
if (_myDatagramSocket != null) {
_myThread.start();
isRunning = _myThread.isAlive();
isSocket = true;
} else {
isRunning = false;
}
}
/**
* @invisible
*/
public void run() {
if (_myDatagramSocket != null) {
if (isRunning) {
Logger.printProcess("UdpServer.run()",
"UdpServer is running @ " + _myPort);
}
} else {
Logger.printError("UdpServer.run()",
"Socket is null. closing UdpServer.");
return;
}
while (isRunning) {
try {
byte[] myBuffer = new byte[_myDatagramSize];
DatagramPacket myPacket = new DatagramPacket(myBuffer,
_myDatagramSize);
_myDatagramSocket.receive(myPacket);
_myListener.process(myPacket, _myPort);
} catch (IOException ioex) {
Logger.printProcess("UdpServer.run()", " socket closed.");
break;
} catch (ArrayIndexOutOfBoundsException ex) {
Logger.printError("UdpServer.run()",
"ArrayIndexOutOfBoundsException: " + ex);
}
}
dispose();
}
/**
* stop the UDP server, clean up and delete its reference.
*/
public void dispose() {
isRunning = false;
_myThread = null;
if (_myDatagramSocket != null) {
if (_myDatagramSocket.isConnected()) {
Logger.printDebug("UdpServer.dispose()", "disconnect()");
_myDatagramSocket.disconnect();
}
Logger.printDebug("UdpServer.dispose()", "close()");
_myDatagramSocket.close();
_myDatagramSocket = null;
Logger.printDebug("UdpServer.dispose()",
"Closing unicast datagram socket.");
}
}
/**
* send a byte array to a previously defined remoteAddress.
*
* @param theBytes
* byte[]
*/
public void send(byte[] theBytes) {
if (isSocket) {
send(theBytes, _myInetAddress, _myPort);
} else {
Logger
.printWarning("UdpClient.send",
"no InetAddress and port has been set. Packet has not been sent.");
}
}
/**
* send a byte array to a dedicated remoteAddress.
*
* @param thePacket
* OscPacket
* @param theAddress
* String
* @param thePort
* int
*/
public void send(byte[] theBytes, String theAddress, int thePort) {
try {
InetAddress myInetAddress = InetAddress.getByName(theAddress);
send(theBytes, myInetAddress, thePort);
} catch (UnknownHostException e) {
Logger.printError("UdpClient.send", "while sending to "
+ theAddress + " " + e);
}
}
/**
* @invisible
* @param thePacket
* DatagramPacket
*/
public void send(DatagramPacket thePacket) {
if (isSocket) {
try {
_myDatagramSocket.send(thePacket);
} catch (IOException e) {
Logger.printError("UdpClient.send",
"ioexception while sending packet.");
}
}
}
/**
* send a byte array to a dedicated remoteAddress.
*
* @param theBytes
* byte[]
* @param theAddress
* InetAddress
* @param thePort
* int
*/
public void send(byte[] theBytes, InetAddress theAddress, int thePort) {
if (isSocket) {
try {
DatagramPacket myPacket = new DatagramPacket(theBytes,
theBytes.length, theAddress, thePort);
send(myPacket);
} catch (NullPointerException npe) {
Logger.printError("UdpServer.send",
"a nullpointer exception occured." + npe);
}
} else {
Logger.printWarning("UdpServer.send",
"DatagramSocket is not running. Packet has not been sent.");
}
}
}
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