Examples with ZMsg org.zeromq.ZMsg used on opensource projects

Example 26 with ZMsg

use of org.zeromq.ZMsg in project jeromq by zeromq.

the class flserver3 method main.

public static void main(String[] args) {
    boolean verbose = (args.length > 0 && args[0].equals("-v"));
    ZContext ctx = new ZContext();
    //  Prepare server socket with predictable identity
    String bindEndpoint = "tcp://*:5555";
    String connectEndpoint = "tcp://localhost:5555";
    Socket server = ctx.createSocket(ZMQ.ROUTER);
    server.setIdentity(connectEndpoint.getBytes(ZMQ.CHARSET));
    server.bind(bindEndpoint);
    System.out.printf("I: service is ready at %s\n", bindEndpoint);
    while (!Thread.currentThread().isInterrupted()) {
        ZMsg request = ZMsg.recvMsg(server);
        if (verbose && request != null)
            request.dump(System.out);
        if (request == null)
            //  Interrupted
            break;
        //  Frame 0: identity of client
        //  Frame 1: PING, or client control frame
        //  Frame 2: request body
        ZFrame identity = request.pop();
        ZFrame control = request.pop();
        ZMsg reply = new ZMsg();
        if (control.equals(new ZFrame("PING")))
            reply.add("PONG");
        else {
            reply.add(control);
            reply.add("OK");
        }
        request.destroy();
        reply.push(identity);
        if (verbose && reply != null)
            reply.dump(System.out);
        reply.send(server);
    }
    if (Thread.currentThread().isInterrupted())
        System.out.printf("W: interrupted\n");
    ctx.destroy();
}

Example 27 with ZMsg

use of org.zeromq.ZMsg in project jeromq by zeromq.

the class mdclient method main.

public static void main(String[] args) {
    boolean verbose = (args.length > 0 && "-v".equals(args[0]));
    mdcliapi clientSession = new mdcliapi("tcp://localhost:5555", verbose);
    int count;
    for (count = 0; count < 100000; count++) {
        ZMsg request = new ZMsg();
        request.addString("Hello world");
        ZMsg reply = clientSession.send("echo", request);
        if (reply != null)
            reply.destroy();
        else
            // Interrupt or failure
            break;
    }
    System.out.printf("%d requests/replies processed\n", count);
    clientSession.destroy();
}

Example 28 with ZMsg

use of org.zeromq.ZMsg in project jeromq by zeromq.

the class mdclient2 method main.

public static void main(String[] args) {
    boolean verbose = (args.length > 0 && "-v".equals(args[0]));
    mdcliapi2 clientSession = new mdcliapi2("tcp://localhost:5555", verbose);
    int count;
    for (count = 0; count < 100000; count++) {
        ZMsg request = new ZMsg();
        request.addString("Hello world");
        clientSession.send("echo", request);
    }
    for (count = 0; count < 100000; count++) {
        ZMsg reply = clientSession.recv();
        if (reply != null)
            reply.destroy();
        else
            // Interrupt or failure
            break;
    }
    System.out.printf("%d requests/replies processed\n", count);
    clientSession.destroy();
}

Example 29 with ZMsg

use of org.zeromq.ZMsg in project jeromq by zeromq.

the class mdwrkapi method receive.

/**
     * Send reply, if any, to broker and wait for next request.
     */
public ZMsg receive(ZMsg reply) {
    // Format and send the reply if we were provided one
    assert (reply != null || !expectReply);
    if (reply != null) {
        assert (replyTo != null);
        reply.wrap(replyTo);
        sendToBroker(MDP.W_REPLY, null, reply);
        reply.destroy();
    }
    expectReply = true;
    while (!Thread.currentThread().isInterrupted()) {
        // Poll socket for a reply, with timeout
        ZMQ.Poller items = ctx.createPoller(1);
        items.register(worker, ZMQ.Poller.POLLIN);
        if (items.poll(timeout) == -1)
            // Interrupted
            break;
        if (items.pollin(0)) {
            ZMsg msg = ZMsg.recvMsg(worker);
            if (msg == null)
                // Interrupted
                break;
            if (verbose) {
                log.format("I: received message from broker: \n");
                msg.dump(log.out());
            }
            liveness = HEARTBEAT_LIVENESS;
            // Don't try to handle errors, just assert noisily
            assert (msg != null && msg.size() >= 3);
            ZFrame empty = msg.pop();
            assert (empty.getData().length == 0);
            empty.destroy();
            ZFrame header = msg.pop();
            assert (MDP.W_WORKER.frameEquals(header));
            header.destroy();
            ZFrame command = msg.pop();
            if (MDP.W_REQUEST.frameEquals(command)) {
                // We should pop and save as many addresses as there are
                // up to a null part, but for now, just save one
                replyTo = msg.unwrap();
                command.destroy();
                // We have a request to process
                return msg;
            } else if (MDP.W_HEARTBEAT.frameEquals(command)) {
            // Do nothing for heartbeats
            } else if (MDP.W_DISCONNECT.frameEquals(command)) {
                reconnectToBroker();
            } else {
                log.format("E: invalid input message: \n");
                msg.dump(log.out());
            }
            command.destroy();
            msg.destroy();
        } else if (--liveness == 0) {
            if (verbose)
                log.format("W: disconnected from broker - retrying\n");
            try {
                Thread.sleep(reconnect);
            } catch (InterruptedException e) {
                // Restore the
                Thread.currentThread().interrupt();
                // interrupted status
                break;
            }
            reconnectToBroker();
        }
        // Send HEARTBEAT if it's time
        if (System.currentTimeMillis() > heartbeatAt) {
            sendToBroker(MDP.W_HEARTBEAT, null, null);
            heartbeatAt = System.currentTimeMillis() + heartbeat;
        }
    }
    if (Thread.currentThread().isInterrupted())
        log.format("W: interrupt received, killing worker\n");
    return null;
}

Example 30 with ZMsg

use of org.zeromq.ZMsg in project jeromq by zeromq.

the class flcliapi method request.

//  .split request method
//  To implement the request method, the frontend object sends a message
//  to the backend, specifying a command "REQUEST" and the request message:
public ZMsg request(ZMsg request) {
    request.push("REQUEST");
    request.send(pipe);
    ZMsg reply = ZMsg.recvMsg(pipe);
    if (reply != null) {
        String status = reply.popString();
        if (status.equals("FAILED"))
            reply.destroy();
    }
    return reply;
}