Request-reply worker in Java

import org.zeromq.ZMQ;
import org.zeromq.ZMQ.Context;
import org.zeromq.ZMQ.Socket;

/**
* Hello World server
* Connects REP socket to tcp://*:5560
* Expects "Hello" from client, replies with "World"
*
* Christophe Huntzinger <chuntzin_at_wanadoo.fr>
*/

public class rrserver{
public static void main (String[] args) {
Context context = ZMQ.context(1);

// Socket to talk to clients
Socket responder = context.socket(ZMQ.REP);
responder.connect("tcp://localhost:5560");

System.out.println("launch and connect server.");

while (!Thread.currentThread().isInterrupted()) {
// Wait for next request from client
byte[] request = responder.recv(0);
String string = new String(request);
System.out.println("Received request: ["+string+"].");

// Do some 'work'
try {
Thread.sleep(1);
} catch (InterruptedException e) {
e.printStackTrace();
}

// Send reply back to client
responder.send("World".getBytes(), 0);
}

// We never get here but clean up anyhow
responder.close();
context.term();
}
}