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

Example 21 with DatagramChannel

use of java.nio.channels.DatagramChannel in project weicoder by wdcode.

the class UdpUtil method write.

/**
 * nio模式发送数据 接收返回数据
 * @param host 服务器主机
 * @param port 服务器端口
 * @param data 发送数据
 * @param len 接收返回数据长度
 * @return 接收的数据
 */
public static byte[] write(String host, int port, byte[] data, int len) {
    // 实例化Socket
    try (DatagramChannel socket = DatagramChannel.open()) {
        // 连接服务器
        socket.connect(new InetSocketAddress(host, port));
        // 写入数据流
        ChannelUtil.write(socket, data, false);
        // 读取数据
        return ChannelUtil.read(socket, false);
    } catch (IOException e) {
        Logs.error(e);
        return ArrayConstants.BYTES_EMPTY;
    }
}

Example 22 with DatagramChannel

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

the class SendHackSelectReceiveUdpPing method run.

private void run() throws IOException {
    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();
    receiveChannel.register(selector, OP_READ, this);
    final NioSelectedKeySet keySet = Common.keySet(selector);
    final AtomicBoolean running = new AtomicBoolean(true);
    SigInt.register(() -> running.set(false));
    while (running.get()) {
        measureRoundTrip(HISTOGRAM, SEND_ADDRESS, buffer, sendChannel, selector, keySet, running);
        HISTOGRAM.reset();
        System.gc();
        LockSupport.parkNanos(1000 * 1000 * 1000);
    }
}

Example 23 with DatagramChannel

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

the class SendReceiveUdpPing method main.

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(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("localhost", Common.PONG_PORT + i));
    }
    final InetSocketAddress sendAddress = new InetSocketAddress("localhost", 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(1000_000_000);
    }
}

Example 24 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 timestamp = buffer.getLong(SIZE_OF_LONG);
            if (receivedSequenceNumber != sequenceNumber) {
                throw new IllegalStateException("Data Loss:" + sequenceNumber + " to " + receivedSequenceNumber);
            }
            final long duration = System.nanoTime() - timestamp;
            histogram.recordValue(duration);
        } 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 25 with DatagramChannel

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

the class ReceiveSendUdpPong method main.

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(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("localhost", Common.PING_PORT + i));
    }
    final InetSocketAddress sendAddress = new InetSocketAddress("localhost", Common.PONG_PORT);
    final DatagramChannel sendChannel = DatagramChannel.open();
    Common.init(sendChannel);
    final AtomicBoolean running = new AtomicBoolean(true);
    SigInt.register(() -> running.set(false));
    while (true) {
        buffer.clear();
        boolean available = false;
        while (!available) {
            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();
        sendChannel.send(buffer, sendAddress);
    }
}