ROUTER-to-DEALER 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 rtdealer
{
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.DEALER);
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.sendMore("");
worker.send("Hi Boss");

// Get workload from broker, until finished
worker.recvStr(); // Envelope delimiter
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.recv(0); // Envelope delimiter
broker.recv(0); // 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();
}
}