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

Example 91 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 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 92 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 93 with Selector

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

the class ClusterNetworkTopologyTest method shouldLogReplicate.

@ParameterizedTest
@MethodSource("singleTopologyConfigurations")
@InterruptAfter(60)
void shouldLogReplicate(final List<String> hostnames, final List<String> internalHostnames, final String ingressChannel, final String logChannel) throws Exception {
    assertNotNull(hostnames);
    assertEquals(3, hostnames.size());
    setupDataCollection(3);
    final String ingressEndpoints = ingressChannel.contains("endpoint") ? null : BasicAuctionClusterClient.ingressEndpoints(hostnames);
    try (RemoteLaunchClient remote0 = RemoteLaunchClient.connect(hostnames.get(0), REMOTE_LAUNCH_PORT);
        RemoteLaunchClient remote1 = RemoteLaunchClient.connect(hostnames.get(1), REMOTE_LAUNCH_PORT)) {
        final Selector selector = Selector.open();
        launchNode(hostnames, internalHostnames, ingressChannel, logChannel, remote0, selector, 0);
        launchNode(hostnames, internalHostnames, ingressChannel, logChannel, remote1, selector, 1);
        connectAndSendMessages(ingressChannel, ingressEndpoints, selector, 10);
    }
    Thread.sleep(5_000);
    try (RemoteLaunchClient remote0 = RemoteLaunchClient.connect(hostnames.get(0), REMOTE_LAUNCH_PORT);
        RemoteLaunchClient remote2 = RemoteLaunchClient.connect(hostnames.get(2), REMOTE_LAUNCH_PORT)) {
        final Selector selector = Selector.open();
        launchNode(hostnames, internalHostnames, ingressChannel, logChannel, remote0, selector, 0);
        launchNode(hostnames, internalHostnames, ingressChannel, logChannel, remote2, selector, 2);
        connectAndSendMessages(ingressChannel, ingressEndpoints, selector, 10);
    }
}

Example 94 with Selector

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

the class ClusterNetworkTopologyTest method shouldGetEchoFromCluster.

@ParameterizedTest
@MethodSource("provideTopologyConfigurations")
@InterruptAfter(60)
void shouldGetEchoFromCluster(final List<String> hostnames, final List<String> internalHostnames, final String ingressChannel, final String logChannel) throws Exception {
    assertNotNull(hostnames);
    assertEquals(3, hostnames.size());
    setupDataCollection(3);
    final String ingressEndpoints = ingressChannel.contains("endpoint") ? null : BasicAuctionClusterClient.ingressEndpoints(hostnames);
    try (RemoteLaunchClient remote0 = RemoteLaunchClient.connect(hostnames.get(0), REMOTE_LAUNCH_PORT);
        RemoteLaunchClient remote1 = RemoteLaunchClient.connect(hostnames.get(1), REMOTE_LAUNCH_PORT);
        RemoteLaunchClient remote2 = RemoteLaunchClient.connect(hostnames.get(2), REMOTE_LAUNCH_PORT)) {
        final Selector selector = Selector.open();
        launchNode(hostnames, internalHostnames, ingressChannel, logChannel, remote0, selector, 0);
        launchNode(hostnames, internalHostnames, ingressChannel, logChannel, remote1, selector, 1);
        launchNode(hostnames, internalHostnames, ingressChannel, logChannel, remote2, selector, 2);
        connectAndSendMessages(ingressChannel, ingressEndpoints, selector, 1);
    }
}

Example 95 with Selector

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

the class LifxLightCommunicationHandler method start.

public void start() {
    try {
        lock.lock();
        logger.debug("{} : Starting communication handler", logId);
        logger.debug("{} : Using '{}' as source identifier", logId, Long.toString(sourceId, 16));
        ScheduledFuture<?> localNetworkJob = networkJob;
        if (localNetworkJob == null || localNetworkJob.isCancelled()) {
            networkJob = scheduler.scheduleWithFixedDelay(this::receiveAndHandlePackets, 0, PACKET_INTERVAL, TimeUnit.MILLISECONDS);
        }
        currentLightState.setOffline();
        Selector localSelector = Selector.open();
        selector = localSelector;
        if (isBroadcastEnabled()) {
            broadcastKey = openBroadcastChannel(selector, logId, broadcastPort);
            selectorContext = new LifxSelectorContext(localSelector, sourceId, sequenceNumberSupplier, logId, host, macAddress, broadcastKey, unicastKey);
            broadcastPacket(new GetServiceRequest());
        } else {
            unicastKey = openUnicastChannel(selector, logId, host);
            selectorContext = new LifxSelectorContext(localSelector, sourceId, sequenceNumberSupplier, logId, host, macAddress, broadcastKey, unicastKey);
            sendPacket(new GetServiceRequest());
        }
    } catch (IOException e) {
        logger.error("{} while starting LIFX communication handler for light '{}' : {}", e.getClass().getSimpleName(), logId, e.getMessage(), e);
    } finally {
        lock.unlock();
    }
}