ROUTER-to-REQ in Java

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

import java.util.Random;

/**
* ROUTER-TO-REQ example
*/

public class rtreq
{
private static Random rand = new Random();
private static final int NBR_WORKERS = 10;

private static class Worker extends Thread {

@Override
public void run() {

Context context = ZMQ.context(1);
Socket worker = context.socket(ZMQ.REQ);
ZHelper.setId (worker); // Set a printable identity

worker.connect("tcp://localhost:5671");

int total = 0;
while (true) {
// Tell the broker we're ready for work
worker.send ("Hi Boss");

// Get workload from broker, until finished
String workload = worker.recvStr ();
boolean finished = workload.equals ("Fired!");
if (finished) {
System.out.printf ("Completed: %d tasks\n", total);
break;
}
total++;

// Do some random work
try {
Thread.sleep (rand.nextInt (500) + 1);
} catch (InterruptedException e) {
}
}
worker.close();
context.term();
}
}

/**
* While this example runs in a single process, that is just to make
* it easier to start and stop the example. Each thread has its own
* context and conceptually acts as a separate process.
*/

public static void main (String[] args) throws Exception {
Context context = ZMQ.context(1);
Socket broker = context.socket(ZMQ.ROUTER);
broker.bind("tcp://*:5671");

for (int workerNbr = 0; workerNbr < NBR_WORKERS; workerNbr++)
{
Thread worker = new Worker ();
worker.start ();
}

// Run for five seconds and then tell workers to end
long endTime = System.currentTimeMillis () + 5000;
int workersFired = 0;
while (true) {
// Next message gives us least recently used worker
String identity = broker.recvStr ();
broker.sendMore (identity);
broker.recvStr (); // Envelope delimiter
broker.recvStr (); // Response from worker
broker.sendMore ("");

// Encourage workers until it's time to fire them
if (System.currentTimeMillis () < endTime)
broker.send ("Work harder");
else {
broker.send ("Fired!");
if (++workersFired == NBR_WORKERS)
break;
}
}

broker.close();
context.term();
}
}