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package com.cycling74.net;
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import com.cycling74.max.Atom;
import com.cycling74.max.MaxRuntimeException;
/**
* Class wrapper to send atoms via UDP/IP. The host on the other side
* must use UdpReceive to read the sended atoms.
*
* This class is a work in progress and have been lightly tested.
*/
public class UdpSender {
InetAddress inetAddress;
DatagramSocket sender;
boolean init;
String address = null;
int port = -1;
public UdpSender() {
}
/**
* Create a UpdSender.
* @param address the hostname/ip address of the host to reach
* @param port the UDP port to use
*/
public UdpSender(String address, int port) {
this.address = address;
this.port = port;
initsocket();
}
public void send(Atom args[]) {
send(Atom.toOneString(args).getBytes());
}
public void send(int i) {
send(Integer.toString(i).getBytes());
}
public void send(float f) {
send(Float.toString(f).getBytes());
}
public void send(String msg, Atom args[]) {
send((msg + " " + Atom.toOneString(args)).getBytes());
}
/**
* Returns the hostname/ip address to reach.
* @return hostname/ip address to reach
*/
public String getAddress() {
return address;
}
/**
* Sets hostname/ip address to reach.
* @param address hostname/ip address to reach
*/
public void setAddress(String address) {
this.address = address;
if ( port != -1 )
initsocket();
}
/**
* Returns the UDP port to use.
* @return the UDP port to use
*/
public int getPort() {
return port;
}
/**
* Sets the UDP port to use.
* @param port the UDP port to use
*/
public void setPort(int port) {
this.port = port;
if ( address != null )
initsocket();
}
synchronized void initsocket() {
try {
sender = null;
inetAddress = InetAddress.getByName(address);
sender = new DatagramSocket();
} catch (Exception e) {
throw new MaxRuntimeException(e);
}
}
void send(byte buff[]) {
if ( sender == null )
throw new MaxRuntimeException("UdpSender: UPD port or address is missing");
try {
DatagramPacket packet = new DatagramPacket(buff, buff.length, inetAddress, port);
sender.send(packet);
} catch (IOException e) {
throw new MaxRuntimeException(e);
}
}
}
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