Examples with DatagramChannel java.nio.channels.DatagramChannel used on opensource projects

Example 1 with DatagramChannel

use of java.nio.channels.DatagramChannel in project pinpoint by naver.

the class SpanStreamUdpSender method createChannel.

private DatagramChannel createChannel(String host, int port, int timeout, int sendBufferSize) {
    DatagramChannel datagramChannel = null;
    DatagramSocket socket = null;
    try {
        datagramChannel = DatagramChannel.open();
        socket = datagramChannel.socket();
        socket.setSoTimeout(timeout);
        socket.setSendBufferSize(sendBufferSize);
        if (logger.isWarnEnabled()) {
            final int checkSendBufferSize = socket.getSendBufferSize();
            if (sendBufferSize != checkSendBufferSize) {
                logger.warn("DatagramChannel.setSendBufferSize() error. {}!={}", sendBufferSize, checkSendBufferSize);
            }
        }
        InetSocketAddress serverAddress = new InetSocketAddress(host, port);
        datagramChannel.connect(serverAddress);
        return datagramChannel;
    } catch (IOException e) {
        if (socket != null) {
            socket.close();
        }
        if (datagramChannel != null) {
            try {
                datagramChannel.close();
            } catch (IOException ignored) {
            }
        }
        throw new IllegalStateException("DatagramChannel create fail. Cause" + e.getMessage(), e);
    }
}

Example 2 with DatagramChannel

use of java.nio.channels.DatagramChannel in project opennms by OpenNMS.

the class SelectorTrackerTest method test.

@Test
public void test() throws IOException {
    Selector selector = Selector.open();
    assertTrue(selector.isOpen());
    selector.close();
    assertFalse(selector.isOpen());
    DatagramChannel c = DatagramChannel.open();
    DatagramSocket s = c.socket();
    s.setSoTimeout(1000);
    byte[] buf = new byte[1024];
    DatagramPacket p = new DatagramPacket(buf, 1024, InetAddress.getLocalHost(), 7);
    s.send(p);
}

Example 3 with DatagramChannel

use of java.nio.channels.DatagramChannel in project voltdb by VoltDB.

the class ExportBenchmark method setupSocketListener.

/**
     * Sets up a UDP socket on a certain port to listen for connections.
     */
private void setupSocketListener() {
    DatagramChannel channel = null;
    // Setup Listener
    try {
        statsSocketSelector = SelectorProvider.provider().openSelector();
        channel = DatagramChannel.open();
        channel.configureBlocking(false);
    } catch (IOException e) {
        exitWithException("Couldn't set up network channels", e);
    }
    // Bind to port & register with a channel
    try {
        InetSocketAddress isa = new InetSocketAddress(CoreUtils.getLocalAddress(), config.statsPort);
        channel.socket().setReuseAddress(true);
        channel.socket().bind(isa);
        channel.register(statsSocketSelector, SelectionKey.OP_READ);
    } catch (IOException e) {
        exitWithException("Couldn't bind to socket", e);
    }
}

Example 4 with DatagramChannel

use of java.nio.channels.DatagramChannel in project jdk8u_jdk by JetBrains.

the class JdpClient method main.

public static void main(String[] args) {
    try {
        String discoveryPort = System.getProperty("com.sun.management.jdp.port");
        String discoveryAddress = System.getProperty("com.sun.management.jdp.address");
        if (discoveryAddress == null || discoveryPort == null) {
            System.out.println("Test failed. address and port must be specified");
            return;
        }
        int port = Integer.parseInt(discoveryPort);
        InetAddress address = InetAddress.getByName(discoveryAddress);
        ProtocolFamily family = (address instanceof Inet6Address) ? StandardProtocolFamily.INET6 : StandardProtocolFamily.INET;
        DatagramChannel channel;
        channel = DatagramChannel.open(family);
        channel.setOption(StandardSocketOptions.SO_REUSEADDR, true);
        channel.bind(new InetSocketAddress(port));
        Enumeration<NetworkInterface> nets = NetworkInterface.getNetworkInterfaces();
        for (NetworkInterface interf : Collections.list(nets)) {
            if (interf.supportsMulticast()) {
                try {
                    channel.join(address, interf);
                } catch (IOException e) {
                // Skip not configured interfaces
                }
            }
        }
        PacketListener listener = new PacketListener(channel);
        new Thread(listener, "Jdp Client").start();
    } catch (RuntimeException e) {
        System.out.println("Test failed.");
    } catch (Exception e) {
        e.printStackTrace();
        System.out.println("Test failed. unexpected error " + e);
    }
}

Example 5 with DatagramChannel

use of java.nio.channels.DatagramChannel in project robovm by robovm.

the class DatagramChannelTest method test_read_LByteBuffer_NotConnected_nullBuf.

/**
     * @tests DatagramChannel#read(ByteBuffer)
     */
public void test_read_LByteBuffer_NotConnected_nullBuf() throws Exception {
    // regression test for Harmony-754
    ByteBuffer c = null;
    DatagramChannel channel = DatagramChannel.open();
    try {
        channel.read(c);
        fail("Should throw NullPointerException");
    } catch (NullPointerException e) {
    // expected
    }
}