Clone client, Model Three in Java

import java.nio.ByteBuffer;
import java.util.HashMap;
import java.util.Map;
import java.util.Random;
import java.util.concurrent.atomic.AtomicLong;

import org.zeromq.ZContext;
import org.zeromq.ZMQ;
import org.zeromq.ZMQ.Poller;
import org.zeromq.ZMQ.Socket;
/**
* Clone client Model Three
* @author Danish Shrestha <moc.liamg|60ahtserhsd#moc.liamg|60ahtserhsd>
*
*/

public class clonecli3 {
private static Map<String, kvsimple> kvMap = new HashMap<String, kvsimple>();

public void run() {
ZContext ctx = new ZContext();
Socket snapshot = ctx.createSocket(ZMQ.DEALER);
snapshot.connect("tcp://localhost:5556");

Socket subscriber = ctx.createSocket(ZMQ.SUB);
subscriber.connect("tcp://localhost:5557");
subscriber.subscribe("".getBytes());

Socket push = ctx.createSocket(ZMQ.PUSH);
push.connect("tcp://localhost:5558");

// get state snapshot
long sequence = 0;
snapshot.send("ICANHAZ?".getBytes(), 0);
while (true) {
kvsimple kvMsg = kvsimple.recv(snapshot);
if (kvMsg == null)
break; // Interrupted

sequence = kvMsg.getSequence();
if ("KTHXBAI".equalsIgnoreCase(kvMsg.getKey())) {
System.out.println("Received snapshot = " + kvMsg.getSequence());
break; // done
}

System.out.println("receiving " + kvMsg.getSequence());
clonecli3.kvMap.put(kvMsg.getKey(), kvMsg);
}

Poller poller = new ZMQ.Poller(1);
poller.register(subscriber);

Random random = new Random();

// now apply pending updates, discard out-of-sequence messages
long alarm = System.currentTimeMillis() + 5000;
while (true) {
int rc = poller.poll(Math.max(0, alarm - System.currentTimeMillis()));
if (rc == -1)
break; // Context has been shut down

if (poller.pollin(0)) {
kvsimple kvMsg = kvsimple.recv(subscriber);
if (kvMsg == null)
break; // Interrupted
if (kvMsg.getSequence() > sequence) {
sequence = kvMsg.getSequence();
System.out.println("receiving " + sequence);
clonecli3.kvMap.put(kvMsg.getKey(), kvMsg);
}
}

if (System.currentTimeMillis() >= alarm) {
int key = random.nextInt(10000);
int body = random.nextInt(1000000);

ByteBuffer b = ByteBuffer.allocate(4);
b.asIntBuffer().put(body);

kvsimple kvUpdateMsg = new kvsimple(key + "", 0, b.array());
kvUpdateMsg.send(push);
alarm = System.currentTimeMillis() + 1000;
}
}
ctx.destroy();
}

public static void main(String[] args) {
new clonecli3().run();
}
}