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

Example 96 with DatagramChannel

use of java.nio.channels.DatagramChannel in project Aeron by real-logic.

the class SendReceiveUdpPing method main.

/**
 * Main method for launching the process.
 *
 * @param args passed to the process.
 * @throws IOException if an error occurs with the channel.
 */
public static void main(final String[] args) throws IOException {
    int numChannels = 1;
    if (1 <= args.length) {
        numChannels = Integer.parseInt(args[0]);
    }
    String remoteHost = "localhost";
    if (2 <= args.length) {
        remoteHost = args[1];
    }
    System.out.printf("Number of channels: %d, Remote host: %s%n", numChannels, remoteHost);
    final Histogram histogram = new Histogram(TimeUnit.SECONDS.toNanos(10), 3);
    final ByteBuffer buffer = ByteBuffer.allocateDirect(Configuration.MTU_LENGTH_DEFAULT);
    final DatagramChannel[] receiveChannels = new DatagramChannel[numChannels];
    for (int i = 0; i < receiveChannels.length; i++) {
        receiveChannels[i] = DatagramChannel.open();
        init(receiveChannels[i]);
        receiveChannels[i].bind(new InetSocketAddress("0.0.0.0", Common.PONG_PORT + i));
    }
    final InetSocketAddress sendAddress = new InetSocketAddress(remoteHost, Common.PING_PORT);
    final DatagramChannel sendChannel = DatagramChannel.open();
    init(sendChannel);
    final AtomicBoolean running = new AtomicBoolean(true);
    SigInt.register(() -> running.set(false));
    while (running.get()) {
        measureRoundTrip(histogram, sendAddress, buffer, receiveChannels, sendChannel, running);
        histogram.reset();
        System.gc();
        LockSupport.parkNanos(1_000_000_000);
    }
}

Example 97 with DatagramChannel

use of java.nio.channels.DatagramChannel in project Aeron by real-logic.

the class WriteReceiveUdpPing method main.

/**
 * Main method for launching the process.
 *
 * @param args passed to the process.
 * @throws IOException if an error occurs with the channel.
 */
public static void main(final String[] args) throws IOException {
    int numChannels = 1;
    if (1 == args.length) {
        numChannels = Integer.parseInt(args[0]);
    }
    final Histogram histogram = new Histogram(TimeUnit.SECONDS.toNanos(10), 3);
    final ByteBuffer buffer = ByteBuffer.allocateDirect(MTU_LENGTH_DEFAULT);
    final DatagramChannel[] receiveChannels = new DatagramChannel[numChannels];
    for (int i = 0; i < receiveChannels.length; i++) {
        receiveChannels[i] = DatagramChannel.open();
        init(receiveChannels[i]);
        receiveChannels[i].bind(new InetSocketAddress("localhost", PONG_PORT + i));
    }
    final InetSocketAddress writeAddress = new InetSocketAddress("localhost", PING_PORT);
    final DatagramChannel writeChannel = DatagramChannel.open();
    init(writeChannel, writeAddress);
    final AtomicBoolean running = new AtomicBoolean(true);
    SigInt.register(() -> running.set(false));
    while (running.get()) {
        measureRoundTrip(histogram, buffer, receiveChannels, writeChannel, running);
        histogram.reset();
        System.gc();
        LockSupport.parkNanos(1000_000_000);
    }
}

Example 98 with DatagramChannel

use of java.nio.channels.DatagramChannel in project Aeron by real-logic.

the class SendSelectReceiveUdpPing method run.

private void run() throws IOException {
    final Histogram histogram = new Histogram(TimeUnit.SECONDS.toNanos(10), 3);
    final ByteBuffer buffer = ByteBuffer.allocateDirect(Configuration.MTU_LENGTH_DEFAULT);
    final DatagramChannel receiveChannel = DatagramChannel.open();
    Common.init(receiveChannel);
    receiveChannel.bind(new InetSocketAddress("localhost", Common.PONG_PORT));
    final DatagramChannel sendChannel = DatagramChannel.open();
    Common.init(sendChannel);
    final Selector selector = Selector.open();
    final IntSupplier handler = () -> {
        try {
            buffer.clear();
            receiveChannel.receive(buffer);
            final long receivedSequenceNumber = buffer.getLong(0);
            final long timestampNs = buffer.getLong(SIZE_OF_LONG);
            if (receivedSequenceNumber != sequenceNumber) {
                throw new IllegalStateException("data Loss:" + sequenceNumber + " to " + receivedSequenceNumber);
            }
            final long durationNs = System.nanoTime() - timestampNs;
            histogram.recordValue(durationNs);
        } catch (final IOException ex) {
            ex.printStackTrace();
        }
        return 1;
    };
    receiveChannel.register(selector, OP_READ, handler);
    final AtomicBoolean running = new AtomicBoolean(true);
    SigInt.register(() -> running.set(false));
    while (running.get()) {
        measureRoundTrip(histogram, SEND_ADDRESS, buffer, sendChannel, selector, running);
        histogram.reset();
        System.gc();
        LockSupport.parkNanos(1000 * 1000 * 1000);
    }
}

Example 99 with DatagramChannel

use of java.nio.channels.DatagramChannel in project Aeron by real-logic.

the class ReceiveWriteUdpPong method main.

/**
 * Main method for launching the process.
 *
 * @param args passed to the process.
 * @throws IOException if an error occurs with the channel.
 */
public static void main(final String[] args) throws IOException {
    int numChannels = 1;
    if (1 == args.length) {
        numChannels = Integer.parseInt(args[0]);
    }
    final ByteBuffer buffer = ByteBuffer.allocateDirect(MTU_LENGTH_DEFAULT);
    final DatagramChannel[] receiveChannels = new DatagramChannel[numChannels];
    for (int i = 0; i < receiveChannels.length; i++) {
        receiveChannels[i] = DatagramChannel.open();
        Common.init(receiveChannels[i]);
        receiveChannels[i].bind(new InetSocketAddress("localhost", Common.PING_PORT + i));
    }
    final InetSocketAddress writeAddress = new InetSocketAddress("localhost", Common.PONG_PORT);
    final DatagramChannel writeChannel = DatagramChannel.open();
    Common.init(writeChannel, writeAddress);
    final AtomicBoolean running = new AtomicBoolean(true);
    SigInt.register(() -> running.set(false));
    while (true) {
        buffer.clear();
        boolean available = false;
        while (!available) {
            ThreadHints.onSpinWait();
            if (!running.get()) {
                return;
            }
            for (int i = receiveChannels.length - 1; i >= 0; i--) {
                if (null != receiveChannels[i].receive(buffer)) {
                    available = true;
                    break;
                }
            }
        }
        final long receivedSequenceNumber = buffer.getLong(0);
        final long receivedTimestamp = buffer.getLong(SIZE_OF_LONG);
        buffer.clear();
        buffer.putLong(receivedSequenceNumber);
        buffer.putLong(receivedTimestamp);
        buffer.flip();
        writeChannel.write(buffer);
    }
}

Example 100 with DatagramChannel

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

the class DatagramChannelAllocator method allocate.

@Override
public DatagramChannelPoolable allocate(Slot slot) throws Exception {
    DatagramChannel channel = DatagramChannel.open();
    channel.connect(new InetSocketAddress(server.getHostName(), server.getPort()));
    ChannelWriter writer = new ChannelWriter(bufferSize, charset, channel);
    return new DatagramChannelPoolable(slot, writer, channel, flushStrategy);
}