Example usage for java.nio.channels DatagramChannel open

Introduction

In this page you can find the example usage for java.nio.channels DatagramChannel open.

Prototype

public static DatagramChannel open(ProtocolFamily family) throws IOException 

Source Link

Document

Opens a datagram channel.

Usage

From source file:Test.java

public static void main(String[] args) throws Exception {
    NetworkInterface networkInterface = NetworkInterface.getByName("net1");

    DatagramChannel dc = DatagramChannel.open(StandardProtocolFamily.INET);

    dc.setOption(StandardSocketOptions.SO_REUSEADDR, true);
    dc.bind(new InetSocketAddress(8080));
    dc.setOption(StandardSocketOptions.IP_MULTICAST_IF, networkInterface);

    InetAddress group = InetAddress.getByName("180.90.4.12");
    MembershipKey key = dc.join(group, networkInterface);
}

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From source file:Main.java

public static void main(String[] args) throws Exception {
    MembershipKey key = null;//from  ww w  .  j  a  v  a2  s .  c  o  m
    DatagramChannel client = DatagramChannel.open(StandardProtocolFamily.INET);

    NetworkInterface interf = NetworkInterface.getByName(MULTICAST_INTERFACE_NAME);
    client.setOption(StandardSocketOptions.SO_REUSEADDR, true);
    client.bind(new InetSocketAddress(MULTICAST_PORT));
    client.setOption(StandardSocketOptions.IP_MULTICAST_IF, interf);

    InetAddress group = InetAddress.getByName(MULTICAST_IP);
    key = client.join(group, interf);

    System.out.println("Joined the   multicast  group:" + key);
    System.out.println("Waiting for a  message  from  the" + "  multicast group....");

    ByteBuffer buffer = ByteBuffer.allocate(1048);
    client.receive(buffer);
    buffer.flip();
    int limits = buffer.limit();
    byte bytes[] = new byte[limits];
    buffer.get(bytes, 0, limits);
    String msg = new String(bytes);

    System.out.format("Multicast Message:%s%n", msg);
    key.drop();
}

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From source file:org.eclipse.smarthome.binding.lifx.internal.LifxLightDiscovery.java

protected void doScan() {

    try {//from  w  w  w.  j av  a 2 s.c o m

        if (!isScanning) {
            isScanning = true;
            if (selector != null) {
                selector.close();
            }

            if (broadcastChannel != null) {
                broadcastChannel.close();
            }

            selector = Selector.open();

            broadcastChannel = DatagramChannel.open(StandardProtocolFamily.INET)
                    .setOption(StandardSocketOptions.SO_REUSEADDR, true)
                    .setOption(StandardSocketOptions.SO_BROADCAST, true);
            broadcastChannel.configureBlocking(false);
            broadcastChannel.socket().setSoTimeout(BROADCAST_TIMEOUT);
            broadcastChannel.bind(new InetSocketAddress(BROADCAST_PORT));

            SelectionKey broadcastKey = broadcastChannel.register(selector,
                    SelectionKey.OP_READ | SelectionKey.OP_WRITE);

            networkJob = scheduler.schedule(networkRunnable, 0, TimeUnit.MILLISECONDS);

            source = UUID.randomUUID().getLeastSignificantBits() & (-1L >>> 32);
            logger.debug("The LIFX discovery service will use '{}' as source identifier",
                    Long.toString(source, 16));

            GetServiceRequest packet = new GetServiceRequest();
            packet.setSequence(SERVICE_REQUEST_SEQ_NO);
            packet.setSource(source);

            broadcastPacket(packet, broadcastKey);
        } else {
            logger.info("A discovery scan for LIFX light is already underway");
        }

    } catch (Exception e) {
        logger.debug("An exception occurred while discovering LIFX lights : '{}'", e.getMessage());
    }

}

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