Simple Pirate worker in Java

import java.util.Random;

import org.zeromq.ZContext;
import org.zeromq.ZFrame;
import org.zeromq.ZMQ;
import org.zeromq.ZMQ.Socket;
import org.zeromq.ZMsg;

//
// Simple Pirate worker
// Connects REQ socket to tcp://*:5556
// Implements worker part of load-balancing queueing
//

public class spworker
{

private final static String WORKER_READY = "\001"; // Signals worker is ready

public static void main(String[] args) throws Exception
{
ZContext ctx = new ZContext();
Socket worker = ctx.createSocket(ZMQ.REQ);

// Set random identity to make tracing easier
Random rand = new Random(System.nanoTime());
String identity = String.format("%04X-%04X", rand.nextInt(0x10000), rand.nextInt(0x10000));
worker.setIdentity(identity.getBytes());
worker.connect("tcp://localhost:5556");

// Tell broker we're ready for work
System.out.printf("I: (%s) worker ready\n", identity);
ZFrame frame = new ZFrame(WORKER_READY);
frame.send(worker, 0);

int cycles = 0;
while (true) {
ZMsg msg = ZMsg.recvMsg(worker);
if (msg == null)
break; // Interrupted

// Simulate various problems, after a few cycles
cycles++;
if (cycles > 3 && rand.nextInt(5) == 0) {
System.out.printf("I: (%s) simulating a crash\n", identity);
msg.destroy();
break;
} else if (cycles > 3 && rand.nextInt(5) == 0) {
System.out.printf("I: (%s) simulating CPU overload\n", identity);
Thread.sleep(3000);
}
System.out.printf("I: (%s) normal reply\n", identity);
Thread.sleep(1000); // Do some heavy work
msg.send(worker);
}
ctx.destroy();
}

}