Example usage for java.net MulticastSocket MulticastSocket

Introduction

In this page you can find the example usage for java.net MulticastSocket MulticastSocket.

Prototype

public MulticastSocket() throws IOException 

Source Link

Document

Create a multicast socket.

Usage

From source file:org.springframework.integration.ip.udp.DatagramPacketMulticastSendingHandlerTests.java

@Test
public void verifySendMulticastWithAcks() throws Exception {

    MulticastSocket socket;/*from   ww  w .  j ava 2s  .co  m*/
    try {
        socket = new MulticastSocket();
    } catch (Exception e) {
        return;
    }
    final int testPort = socket.getLocalPort();
    final AtomicInteger ackPort = new AtomicInteger();

    final String multicastAddress = "225.6.7.8";
    final String payload = "foobar";
    final CountDownLatch listening = new CountDownLatch(2);
    final CountDownLatch ackListening = new CountDownLatch(1);
    final CountDownLatch ackSent = new CountDownLatch(2);
    Runnable catcher = () -> {
        try {
            byte[] buffer = new byte[1000];
            DatagramPacket receivedPacket = new DatagramPacket(buffer, buffer.length);
            MulticastSocket socket1 = new MulticastSocket(testPort);
            socket1.setInterface(InetAddress.getByName(multicastRule.getNic()));
            socket1.setSoTimeout(8000);
            InetAddress group = InetAddress.getByName(multicastAddress);
            socket1.joinGroup(group);
            listening.countDown();
            assertTrue(ackListening.await(10, TimeUnit.SECONDS));
            LogFactory.getLog(getClass()).debug(Thread.currentThread().getName() + " waiting for packet");
            socket1.receive(receivedPacket);
            socket1.close();
            byte[] src = receivedPacket.getData();
            int length = receivedPacket.getLength();
            int offset = receivedPacket.getOffset();
            byte[] dest = new byte[6];
            System.arraycopy(src, offset + length - 6, dest, 0, 6);
            assertEquals(payload, new String(dest));
            LogFactory.getLog(getClass()).debug(Thread.currentThread().getName() + " received packet");
            DatagramPacketMessageMapper mapper = new DatagramPacketMessageMapper();
            mapper.setAcknowledge(true);
            mapper.setLengthCheck(true);
            Message<byte[]> message = mapper.toMessage(receivedPacket);
            Object id = message.getHeaders().get(IpHeaders.ACK_ID);
            byte[] ack = id.toString().getBytes();
            DatagramPacket ackPack = new DatagramPacket(ack, ack.length,
                    new InetSocketAddress(multicastRule.getNic(), ackPort.get()));
            DatagramSocket out = new DatagramSocket();
            out.send(ackPack);
            LogFactory.getLog(getClass())
                    .debug(Thread.currentThread().getName() + " sent ack to " + ackPack.getSocketAddress());
            out.close();
            ackSent.countDown();
            socket1.close();
        } catch (Exception e) {
            listening.countDown();
            e.printStackTrace();
        }
    };
    Executor executor = Executors.newFixedThreadPool(2);
    executor.execute(catcher);
    executor.execute(catcher);
    assertTrue(listening.await(10000, TimeUnit.MILLISECONDS));
    MulticastSendingMessageHandler handler = new MulticastSendingMessageHandler(multicastAddress, testPort,
            true, true, "localhost", 0, 10000);
    handler.setLocalAddress(this.multicastRule.getNic());
    handler.setMinAcksForSuccess(2);
    handler.setBeanFactory(mock(BeanFactory.class));
    handler.afterPropertiesSet();
    handler.start();
    waitAckListening(handler);
    ackPort.set(handler.getAckPort());
    ackListening.countDown();
    handler.handleMessage(MessageBuilder.withPayload(payload).build());
    assertTrue(ackSent.await(10000, TimeUnit.MILLISECONDS));
    handler.stop();
    socket.close();
}

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From source file:org.openhab.binding.yeelight.internal.YeelightBinding.java

private void setupSocket() {
    try {//w  w  w.jav  a2 s  . c  o  m
        socket = new MulticastSocket(); // must bind receive side
        socket.joinGroup(InetAddress.getByName(MCAST_ADDR));
    } catch (IOException e) {
        logger.error(e.toString());
    }

    thread = new Thread(new Runnable() {
        public void run() {
            receiveData(socket, dgram);
        }
    });
    thread.start();
}

---

From source file:org.nebulaframework.discovery.multicast.MulticastDiscovery.java

/**
 * Responds  to a Multicast Discovery Request by publishing
 * the IP Address of Service into response channel. 
 *///from w  w w . jav  a  2s . c o  m
protected static void doRespond() {

    // Only allowed for ClusterManagers
    if (!Grid.isClusterManager()) {
        throw new UnsupportedOperationException(
                "Multicast Discovery Service can be enabled only for ClusterManagers");
    }

    try {
        // Get Broker Service URL
        String serviceUrl = ClusterManager.getInstance().getClusterInfo().getServiceUrl();

        byte[] hostInfo = NetUtils.getHostInfoAsBytes(serviceUrl);

        // Create Response Packet
        DatagramPacket response = new DatagramPacket(hostInfo, hostInfo.length, SERVICE_RESPONSE_IP,
                SERVICE_PORT);

        // Create Multicast Socket
        MulticastSocket resSock = new MulticastSocket();

        // Send response
        resSock.send(response);

        log.debug("[MulticastDiscovery] Responded Discovery Request");
    } catch (Exception e) {
        log.error("[MulticastDiscovery] Service Failed to Reply", e);
    }

}

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From source file:org.lwes.emitter.MulticastEventEmitter.java

/**
 * Initializes the emitter./*w  w w  .java 2  s.com*/
 */
@Override
public void initialize() throws IOException {
    socket = new MulticastSocket();

    if (iface != null) {
        socket.setInterface(iface);
    }

    socket.setTimeToLive(ttl);
    super.initialize();
}

---

From source file:org.nebulaframework.discovery.multicast.MulticastDiscovery.java

/**
 * Discovery Process to identify Clusters with in 
 * network./*from   ww w  .  j  a v a2s  . c o m*/
 * 
 * @throws IOException if occurred during operation
 */
private void doDiscover() throws IOException {

    // Send Request
    byte[] greet = GREET_MSG.getBytes("UTF-8");
    DatagramPacket request = new DatagramPacket(greet, greet.length, SERVICE_REQUEST_IP, SERVICE_PORT);
    MulticastSocket reqSock = new MulticastSocket();
    reqSock.send(request);

    // Wait for Response
    MulticastSocket resSock = new MulticastSocket(SERVICE_PORT);
    resSock.joinGroup(SERVICE_RESPONSE_IP);

    // 9 = # of bytes for an IP Address + 5 byte port
    DatagramPacket response = new DatagramPacket(new byte[9], 9);

    // Receive
    resSock.setSoTimeout((int) TIMEOUT);
    try {
        resSock.receive(response);
    } catch (SocketTimeoutException e) {
        log.debug("[MulticastDiscovery] Receive Timeout");
        return;
    }

    byte[] data = response.getData();

    byte[] ipBytes = Arrays.copyOfRange(data, 0, 4);
    byte[] portBytes = Arrays.copyOfRange(data, 4, 9);

    InetAddress ip = InetAddress.getByAddress(ipBytes);
    StringBuilder sb = new StringBuilder(ip.getHostAddress());
    sb.append(":");
    for (byte b : portBytes) {
        sb.append(b);
    }

    this.cluster = sb.toString();
}

---

From source file:net.sf.ehcache.distribution.MulticastRMIPeerProviderTest.java

/**
 * Determines that the multicast TTL default is 1, which means that packets are restricted to the same subnet.
 * peerDiscovery=automatic, multicastGroupAddress=230.0.0.1, multicastGroupPort=4446, multicastPacketTimeToLive=255
 *//*  w ww.j a va  2s  .  com*/
public void testMulticastTTL() throws IOException {
    InetAddress groupAddress = InetAddress.getByName("230.0.0.1");
    MulticastSocket socket = new MulticastSocket();
    socket.joinGroup(groupAddress);
    int ttl = socket.getTimeToLive();
    assertEquals(1, ttl);
}

---

From source file:org.nebulaframework.discovery.multicast.MulticastDiscovery.java

/**
 * Attempts to discover peer clusters using Multicast
 * Discovery. Each discovered Cluster will be notified
 * to the {@code PeerClusterService} of the 
 * ClusterManager.//from  ww w.  j  a  v  a  2 s. c  o  m
 * 
 * @throws IOException if occurred during process
 */
public static void discoverPeerClusters() throws IOException {

    // Only allowed for ClusterManagers
    if (!Grid.isClusterManager()) {
        throw new UnsupportedOperationException(
                "Multicast Discovery Service can be enabled only for ClusterManagers");
    }

    log.info("[MulticastDiscovery] Discovering Peer Clusters...");

    // Send Request
    byte[] greet = GREET_MSG.getBytes("UTF-8");
    DatagramPacket request = new DatagramPacket(greet, greet.length, SERVICE_REQUEST_IP, SERVICE_PORT);
    MulticastSocket reqSock = new MulticastSocket();
    reqSock.send(request);

    // Response Socket
    MulticastSocket resSock = new MulticastSocket(SERVICE_PORT);
    resSock.joinGroup(SERVICE_RESPONSE_IP);

    // 9 = # of bytes for an IP Address + 5 byte port
    DatagramPacket response = new DatagramPacket(new byte[9], 9);

    // Set Socket Timeout
    resSock.setSoTimeout((int) TIMEOUT);

    try {

        // Loop until Socket Timeout Occurs
        while (true) {

            // Receive
            resSock.receive(response);
            processPeerResponse(response.getData());

        }

    } catch (SocketTimeoutException e) {
        log.debug("[MulticastDiscovery] Receive Timeout");
        return;
    } finally {
        log.info("[MulticastDiscovery] Peer Cluster Discovery Complete");
    }

}

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From source file:com.all.landownloader.discovery.LanDiscoverySocket.java

private void announce() throws IllegalArgumentException {
    try {/*  ww  w  .j  a  v  a2  s . co m*/
        byte[] buf = createPacket(ANNOUNCE_MSG);
        DatagramPacket packet = new DatagramPacket(buf, buf.length, addressGroup, PORT);
        MulticastSocket socket = new MulticastSocket();
        socket.send(packet);
        packet = new DatagramPacket(buf, buf.length, broadcast, PORT);
        socket.send(packet);
        socket.close();
    } catch (Exception e) {
    }

}

---

From source file:com.all.landownloader.discovery.LanDiscoverySocket.java

public void announceDeath() throws IllegalArgumentException {
    try {/*  w w w .  ja  va2 s  .  co  m*/
        byte[] buf = createPacket(BYE_MSG);
        DatagramPacket packet = new DatagramPacket(buf, buf.length, addressGroup, PORT);
        MulticastSocket socket = new MulticastSocket();
        socket.send(packet);
        packet = new DatagramPacket(buf, buf.length, broadcast, PORT);
        socket.send(packet);
        socket.close();
    } catch (IOException e) {
    }
}

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