import org.zeromq.ZMQ;
import org.zeromq.ZMQ.Context;
import org.zeromq.ZMQ.Socket;
/**
* Multithreaded relay
*/
public class mtrelay{
private static class Step1 extends Thread
{
private Context context;
private Step1 (Context context)
{
this.context = context;
}
@Override
public void run(){
// Signal downstream to step 2
Socket xmitter = context.socket(ZMQ.PAIR);
xmitter.connect("inproc://step2");
System.out.println ("Step 1 ready, signaling step 2");
xmitter.send("READY", 0);
xmitter.close ();
}
}
private static class Step2 extends Thread
{
private Context context;
private Step2 (Context context)
{
this.context = context;
}
@Override
public void run(){
// Bind to inproc: endpoint, then start upstream thread
Socket receiver = context.socket(ZMQ.PAIR);
receiver.bind("inproc://step2");
Thread step1 = new Step1 (context);
step1.start();
// Wait for signal
receiver.recv(0);
receiver.close ();
// Connect to step3 and tell it we're ready
Socket xmitter = context.socket(ZMQ.PAIR);
xmitter.connect("inproc://step3");
xmitter.send("READY", 0);
xmitter.close ();
}
}
public static void main (String[] args) {
Context context = ZMQ.context(1);
// Bind to inproc: endpoint, then start upstream thread
Socket receiver = context.socket(ZMQ.PAIR);
receiver.bind("inproc://step3");
// Step 2 relays the signal to step 3
Thread step2 = new Step2 (context);
step2.start();
// Wait for signal
receiver.recv(0);
receiver.close ();
System.out.println ("Test successful!");
context.term ();
}
}