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

Example 31 with Selector

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

the class WakeupAfterClose method main.

public static void main(String[] args) throws Exception {
    final Selector sel = Selector.open();
    Runnable r = new Runnable() {

        public void run() {
            try {
                sel.select();
            } catch (IOException x) {
                x.printStackTrace();
            }
        }
    };
    // start thread to block in Selector
    Thread t = new Thread(r);
    t.start();
    // give thread time to start
    Thread.sleep(1000);
    // interrupt, close, and wakeup is the magic sequence to provoke the NPE
    t.interrupt();
    sel.close();
    sel.wakeup();
}

Example 32 with Selector

use of java.nio.channels.Selector in project baseio by generallycloud.

the class SocketSelectorEventLoop method openSelector.

@SuppressWarnings("rawtypes")
private SocketSelector openSelector(SelectableChannel channel) throws IOException {
    SelectorProvider provider = SelectorProvider.provider();
    Object res = AccessController.doPrivileged(new PrivilegedAction<Object>() {

        @Override
        public Object run() {
            try {
                return Class.forName("sun.nio.ch.SelectorImpl");
            } catch (Throwable cause) {
                return cause;
            }
        }
    });
    final Selector selector = provider.openSelector();
    if (res instanceof Throwable) {
        return new NioSocketSelector(this, channel, selector);
    }
    final Class selectorImplClass = (Class) res;
    final SelectionKeySet keySet = new SelectionKeySet();
    res = AccessController.doPrivileged(new PrivilegedAction<Object>() {

        @Override
        public Object run() {
            try {
                Field selectedKeysField = selectorImplClass.getDeclaredField("selectedKeys");
                Field publicSelectedKeysField = selectorImplClass.getDeclaredField("publicSelectedKeys");
                Throwable cause = ClassUtil.trySetAccessible(selectedKeysField);
                if (cause != null) {
                    return cause;
                }
                cause = ClassUtil.trySetAccessible(publicSelectedKeysField);
                if (cause != null) {
                    return cause;
                }
                selectedKeysField.set(selector, keySet);
                publicSelectedKeysField.set(selector, keySet);
                return null;
            } catch (Exception e) {
                return e;
            }
        }
    });
    if (res instanceof Throwable) {
        return new NioSocketSelector(this, channel, selector);
    }
    selectionKeySet = keySet;
    return new SelectionKeyNioSocketSelector(this, channel, selector, keySet);
}

Example 33 with Selector

use of java.nio.channels.Selector 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 34 with Selector

use of java.nio.channels.Selector 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 35 with Selector

use of java.nio.channels.Selector in project smarthome by eclipse.

the class LifxLightDiscovery method handlePacket.

private void handlePacket(Packet packet, InetSocketAddress address) {
    logger.trace("Discovery : Packet type '{}' received from '{}' for '{}' with sequence '{}' and source '{}'", new Object[] { packet.getClass().getSimpleName(), address.toString(), packet.getTarget().getHex(), packet.getSequence(), Long.toString(packet.getSource(), 16) });
    if (packet.getSource() == sourceId || packet.getSource() == 0) {
        MACAddress macAddress = packet.getTarget();
        DiscoveredLight light = discoveredLights.get(macAddress);
        if (packet instanceof StateServiceResponse) {
            int port = (int) ((StateServiceResponse) packet).getPort();
            if (port != 0) {
                try {
                    InetSocketAddress socketAddress = new InetSocketAddress(address.getAddress(), port);
                    if (light == null || (!socketAddress.equals(light.socketAddress))) {
                        if (light != null) {
                            light.cancelUnicastKey();
                        }
                        Selector lightSelector = selector;
                        if (lightSelector != null) {
                            String logId = getLogId(macAddress, socketAddress);
                            light = new DiscoveredLight(lightSelector, macAddress, socketAddress, logId, openUnicastChannel(lightSelector, logId, socketAddress));
                            discoveredLights.put(macAddress, light);
                        }
                    }
                } catch (Exception e) {
                    logger.warn("{} while connecting to IP address: {}", e.getClass().getSimpleName(), e.getMessage());
                    return;
                }
            }
        } else if (light != null) {
            if (packet instanceof StateLabelResponse) {
                light.label = ((StateLabelResponse) packet).getLabel().trim();
            } else if (packet instanceof StateVersionResponse) {
                try {
                    light.product = Products.getProductFromProductID(((StateVersionResponse) packet).getProduct());
                    light.productVersion = ((StateVersionResponse) packet).getVersion();
                } catch (IllegalArgumentException e) {
                    logger.debug("Discovered an unsupported light ({}): {}", light.macAddress.getAsLabel(), e.getMessage());
                    light.supportedProduct = false;
                }
            }
        }
        if (light != null && light.isDataComplete()) {
            try {
                thingDiscovered(createDiscoveryResult(light));
            } catch (IllegalArgumentException e) {
                logger.trace("{} while creating discovery result of light ({})", e.getClass().getSimpleName(), light.logId, e);
            }
        }
    }
}