Java Code Examples for org.zeromq.ZMQ.Context#socket()

private void callbackRun(Context ctx) {
    Socket cbWorker = ctx.socket(ZMQ.DEALER);
    cbWorker.setReceiveTimeOut(RECVTIMEOUT);
    cbWorker.connect(CB_BIND_ADDR + addrBindNumber);
    if (LOGGER.isDebugEnabled()) {
        LOGGER.debug("connected!");
    }

    while (true) {
        byte[] rsp = cbWorker.recv(ZMQ.PAIR);
        if (this.running) {
            if (LOGGER.isTraceEnabled()) {
                LOGGER.trace(
                        "recv msg: [{}]", (rsp != null ? IUtils.bytes2Hex(rsp) : "= null"));
            }
            process(rsp);
        } else {
            break;
        }
    }

    LOGGER.info("closing!");
    cbWorker.close();
    LOGGER.info("closed!");
}
 

private static void sendAsync(int val, String account) throws IOException {
    ObjectMapper objectMapper = new ObjectMapper();
    Context context = ZMQ.context(1);

    //  Socket to talk to server
    Socket requester = context.socket(ZMQ.REQ);
    requester.connect("tcp://localhost:5559");
    System.out.println("launch and connect client.");
    ValidateRequest req = new ValidateRequest(account, new BigDecimal(val));

    //send request
    requester.send(objectMapper.writeValueAsString(req), 0);
    //receive response
    String responseStr = requester.recvStr(0);

    //parse and print reply
    ValidateResponse reply = objectMapper.readValue(responseStr, ValidateResponse.class);
    System.out.println("Received reply for request= " + req + " reply= " + reply + "");

    //  We never get here but clean up anyhow
    requester.close();
    context.term();
}
 

public static void main (String[] args) {
    //  Prepare our context and sockets
    Context context = ZMQ.context(1);

    //  Socket facing clients
    Socket frontend = context.socket(ZMQ.ROUTER);
    frontend.bind("tcp://*:5559");

    //  Socket facing services
    Socket backend = context.socket(ZMQ.DEALER);
    backend.bind("tcp://*:5560");

    //  Start the proxy
    ZMQ.proxy (frontend, backend, null);

    //  We never get here but clean up anyhow
    frontend.close();
    backend.close();
    context.term();
}
 

@Override
public void execute(ServiceContext serviceContext) throws Exception {
    ObjectMapper objectMapper = new ObjectMapper();
    Context context = ZMQ.context(1);

    //  Socket to talk to server
    Socket responder = context.socket(ZMQ.REP);
    responder.connect(zeroMqBrokerAddress);
    ZMQ.PollItem items[] = {new ZMQ.PollItem(responder, ZMQ.Poller.POLLIN)};
    while (!Thread.currentThread().isInterrupted() && !serviceContext.isCancelled()) {
        //  Wait for next request from client
        int rc = ZMQ.poll(items, 1000);
        if (rc == -1) {
            continue;
        }

        if (items[0].isReadable()) {
            String reqStr = responder.recvStr(0);
            System.out.printf("Received request: [%s]\n", reqStr);

            ValidateRequest req = objectMapper.readValue(reqStr, ValidateRequest.class);

            ValidateResponse result = validateOperation(req.getAccount(), req.getSum());
            System.out.printf("send response request: [%s]\n", result);

            responder.send(objectMapper.writeValueAsString(result));
        }
    }
    System.out.println("Stop async read!");

    //  We never get here but clean up anyhow
    responder.close();
    context.term();

}
 

public WebMQSubscriber(HttpServletResponse response, String port, String topics) {
	  // Prepare our context and subscriber
	
	
       Context context = ZMQ.context(1);
       Socket subscriber = context.socket(ZMQ.SUB);

       subscriber.connect("tcp://localhost:" + port);
       
       String [] parts = topics.split(",");
       for (String topic : parts) {
       	subscriber.subscribe(topic.getBytes());
       }

       while (!Thread.currentThread ().isInterrupted ()) {
           // Read envelope with address
           String address = subscriber.recvStr ();
           // Read message contents
           String contents = subscriber.recvStr ();
           Map m = new HashMap();
           m.put("topic", address);
           m.put("message", contents);
          
           try {
           	contents = mapper.writeValueAsString(m);
			response.getWriter().println(contents);
			response.flushBuffer();       	
		} catch (IOException e) {
			//e.printStackTrace();
			break;
		}               
       }
       subscriber.close ();
       context.term ();
}
 

@Override
public void run() {
    LOG.info("Starting Aion Api Server <port={}>", cfgApi.getPort());
    String bindAddr = "tcp://" + cfgApi.getIp() + ":" + cfgApi.getPort();
    int msgTh = 5;

    try {
        // create context.
        Context ctx = ZMQ.context(1);

        // create router sock.
        Socket feSock = ctx.socket(ROUTER);
        if (cfgApi.isSecureConnectEnabledEnabled()) {
            // Currently the system will only load the first pair of the key files.
            loadCurveKeyPair();

            if (curveSecKey != null && curvePubKey != null) {
                feSock.setZAPDomain("global".getBytes());
                feSock.setCurveServer(true);
                feSock.setCurvePublicKey(curvePubKey);
                feSock.setCurveSecretKey(curveSecKey);
                LOG.info("Secure connection enabled!");
            } else {
                LOG.info(
                        "Can't find the keyfile for setup the connection. Secure connection disabled!");
            }
        } else {
            LOG.info("Secure connection disabled!");
        }

        feSock.setSndHWM(zmqHWM);
        feSock.bind(bindAddr);

        Socket wkSocks = ctx.socket(DEALER);
        wkSocks.bind(AION_ZMQ_WK_TH);

        Socket cbSock = ctx.socket(DEALER);
        cbSock.bind(AION_ZMQ_CB_TH);

        Socket evSock = ctx.socket(DEALER);
        evSock.bind(AION_ZMQ_EV_TH);

        Socket hbSock = ctx.socket(DEALER);
        hbSock.bind(AION_ZMQ_HB_TH);

        ExecutorService es = Executors.newFixedThreadPool(msgTh);
        es.execute(() -> callbackRun(ctx));
        es.execute(this::txWaitRun);
        es.execute(() -> eventRun(ctx));
        es.execute(() -> workerRun(ctx));
        es.execute(() -> hbRun(ctx));

        Proxy.proxy(feSock, wkSocks, cbSock, evSock, hbSock);

        if (LOG.isInfoEnabled()) {
            LOG.info("ProtocolProcessor.run thread finish.");
        }

        if (LOG.isInfoEnabled()) {
            LOG.info("Shutting down Zmq sockets...");
        }
        // Shutdown HdlrZmq
        ((HdlrZmq) handler).shutdown();
        // Shutdown ZmqSocket
        feSock.close();
        wkSocks.close();
        cbSock.close();
        evSock.close();
        hbSock.close();
        // Shutdown ExecutorService
        es.shutdown();

        ctx.close();
        if (LOG.isInfoEnabled()) {
            LOG.info("Shutdown Zmq sockets... Done!");
        }

    } catch (Exception e) {
        if (LOG.isErrorEnabled()) {
            LOG.error("ProtocolProcessor.run exception: " + e.getMessage());
        }
    }
}
 

private void callbackRun(Context ctx) {
    Socket sock = ctx.socket(ZMQ.DEALER);
    sock.connect(AION_ZMQ_CB_TH);

    while (!shutDown.get()) {
        TxPendingStatus tps;
        try {
            tps = ((HdlrZmq) this.handler).getTxStatusQueue().take();
        } catch (InterruptedException e1) {
            // TODO Auto-generated catch block
            if (LOG.isErrorEnabled()) {
                LOG.error("queue take exception - [{}]", e1.getMessage());
            }
            continue;
        }

        if (tps.isEmpty()) {
            continue;
        }

        byte[] rsp =
                tps.toTxReturnCode() != 105
                        ? ((HdlrZmq) this.handler)
                                .toRspMsg(
                                        tps.getMsgHash(), tps.toTxReturnCode(), tps.getError())
                        : ((HdlrZmq) this.handler)
                                .toRspMsg(
                                        tps.getMsgHash(),
                                        tps.toTxReturnCode(),
                                        tps.getError(),
                                        tps.getTxResult());
        if (LOG.isTraceEnabled()) {
            LOG.trace(
                    "callbackRun send. socketID: [{}], msgHash: [{}], txReturnCode: [{}]/n rspMsg: [{}]",
                    Hex.toHexString(tps.getSocketId()),
                    Hex.toHexString(tps.getMsgHash()),
                    tps.toTxReturnCode(),
                    Hex.toHexString(rsp));
        }
        try {
            sock.send(tps.getSocketId(), ZMQ.SNDMORE);
            sock.send(rsp, ZMQ.DONTWAIT);
        } catch (Exception e) {
            if (LOG.isErrorEnabled()) {
                LOG.error(
                        "ProtocolProcessor.callbackRun sock.send exception: " + e.getMessage());
            }
        }
    }
    sock.close();
    if (LOG.isDebugEnabled()) {
        LOG.debug("close callbackRun sockets...");
    }
}
 

private void heartBeatRun(Context ctx) {
    Socket hbWorker = ctx.socket(ZMQ.DEALER);
    hbWorker.connect(HB_BIND_ADDR + addrBindNumber);
    hbWorker.setReceiveTimeOut(1000);
    if (LOGGER.isDebugEnabled()) {
        LOGGER.debug("hbWorker connected!");
    }

    int hbTolerance = HB_TOLERANCE;
    byte[] hbMsg = ApiUtils.toReqHeader(this.ver, Message.Servs.s_hb, Message.Funcs.f_NA);

    while (this.running && hbTolerance > 0) {
        if (LOGGER.isDebugEnabled()) {
            LOGGER.debug("send hb!");
        }
        if (!hbWorker.send(hbMsg, ZMQ.DONTWAIT)) {
            if (LOGGER.isErrorEnabled()) {
                LOGGER.error("send heartbeat msg failed.");
            }
            continue;
        }

        byte[] rsp = hbWorker.recv(ZMQ.PAIR);
        if (LOGGER.isDebugEnabled()) {
            LOGGER.debug("recv msg: [{}]", (rsp != null ? IUtils.bytes2Hex(rsp) : "null"));
        }

        if (checkNotHbRspMsg(rsp)) {
            hbTolerance--;
        } else {
            hbTolerance = HB_TOLERANCE;
        }

        try {
            Thread.sleep(HB_POLL_MS);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

    if (this.running) {
        this.running = false;
        LOGGER.warn("timeout, disconnect the connection!");
        hbWorker.close();
        terminate();
        LOGGER.info("closed!");
    }
}
 

private void workerRun(Context ctx) {
    Socket worker = ctx.socket(ZMQ.DEALER);
    worker.connect(WK_BIND_ADDR + addrBindNumber);
    worker.setReceiveTimeOut(RECVTIMEOUT);
    if (LOGGER.isDebugEnabled()) {
        LOGGER.debug("connected!");
    }

    while (true) {
        MsgReq msg = null;
        try {
            msg = queue.poll(RECVTIMEOUT, TimeUnit.MILLISECONDS);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

        if (!this.running) {
            break;
        }

        if (msg != null && msg.req != null) {
            if (LOGGER.isDebugEnabled()) {
                LOGGER.debug("poll q: [{}]", IUtils.bytes2Hex(msg.hash));
            }

            if (!worker.send(msg.req, ZMQ.PAIR)) {
                if (LOGGER.isErrorEnabled()) {
                    LOGGER.error("send msg failed. Msg: [{}]", IUtils.bytes2Hex(msg.req));
                }
                continue;
            }

            byte[] rsp = worker.recv(ZMQ.PAIR);
            if (this.running) {
                if (rsp == null) {
                    if (LOGGER.isErrorEnabled()) {
                        LOGGER.error("recv msg: [null]");
                    }
                    return;
                }

                if (LOGGER.isDebugEnabled()) {
                    LOGGER.debug("recv msg: [{}]", IUtils.bytes2Hex(rsp));
                }
                process(rsp);
            } else {
                break;
            }
        }
    }

    LOGGER.info("closing!");
    worker.close();
    LOGGER.info("closed!");
}