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package com.cycling74.net;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import com.cycling74.max.Atom;
import com.cycling74.max.MaxRuntimeException;
//import com.cycling74.max.MaxSystem;
import com.cycling74.max.Callback;
/**
* Class wrapper to receive atoms via UDP/IP using the class
* UdpSender.
*
* This class is a work in progress and have been lightly tested.
*/
public class UdpReceiver implements Runnable {
DatagramSocket receiver;
DatagramPacket packet;
Callback callback = null;
String debugString = null;
boolean runnable = true;
int port = -1;
public UdpReceiver() {
}
public UdpReceiver(int port) {
this.port = port;
}
public void close() {
if ( receiver == null )
return;
runnable = false;
receiver.close();
}
public int getPort() {
return port;
}
public void setActive(boolean active) {
if ( active == true ) {
if ( port == -1 )
throw new MaxRuntimeException("No UDP port specified");
try {
receiver = new DatagramSocket(port);
} catch ( Exception e ) {
throw new MaxRuntimeException(e);
}
runnable = true;
new Thread(this, "UdpReceiver[" + port + "]").start();
} else {
close();
}
}
public void setCallback(Object caller, String methodName) {
callback = new Callback(caller, methodName, new Object[] { new Atom[0] });
}
public void setPort(int port) {
setActive(false);
this.port = port;
}
public void setDebugString(String debugString) {
this.debugString = debugString;
}
public void run() {
try {
while(runnable) {
DatagramPacket packet = new DatagramPacket(new byte[4096], 4096);
receiver.receive(packet);
String msg = new String(packet.getData(), 0, packet.getLength());
//if ( debugString != null )
// MaxSystem.post(debugString + " " + msg);
if ( callback != null ) {
callback.setArgs(Atom.parse(msg));
try {
callback.execute();
} catch( Exception e ) {
e.printStackTrace();
}
}
}
} catch (Exception e) {
if ( runnable != false) {
runnable = false;
throw new MaxRuntimeException(e);
}
}
}
}
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