Examples with Subscription io.aeron.Subscription used on opensource projects

Example 21 with Subscription

use of io.aeron.Subscription in project Aeron by real-logic.

the class MultipleSubscribersWithFragmentAssembly method eventUnavailableImage.

/**
 * This handler is called when image is unavailable.
 *
 * @param image that has gone inactive.
 */
public static void eventUnavailableImage(final Image image) {
    final Subscription subscription = image.subscription();
    System.out.format("inactive image on %s streamId %d sessionId %x%n", subscription.channel(), subscription.streamId(), image.sessionId());
}

Example 22 with Subscription

use of io.aeron.Subscription in project Aeron by real-logic.

the class Pong method main.

/**
 * Main method for launching the process.
 *
 * @param args passed to the process.
 */
public static void main(final String[] args) {
    final MediaDriver driver = EMBEDDED_MEDIA_DRIVER ? MediaDriver.launchEmbedded() : null;
    final Aeron.Context ctx = new Aeron.Context();
    if (EMBEDDED_MEDIA_DRIVER) {
        ctx.aeronDirectoryName(driver.aeronDirectoryName());
    }
    if (INFO_FLAG) {
        ctx.availableImageHandler(SamplesUtil::printAvailableImage);
        ctx.unavailableImageHandler(SamplesUtil::printUnavailableImage);
    }
    final IdleStrategy idleStrategy = new BusySpinIdleStrategy();
    System.out.println("Subscribing Ping at " + PING_CHANNEL + " on stream id " + PING_STREAM_ID);
    System.out.println("Publishing Pong at " + PONG_CHANNEL + " on stream id " + PONG_STREAM_ID);
    System.out.println("Using exclusive publications " + EXCLUSIVE_PUBLICATIONS);
    final AtomicBoolean running = new AtomicBoolean(true);
    SigInt.register(() -> running.set(false));
    try (Aeron aeron = Aeron.connect(ctx);
        Subscription subscription = aeron.addSubscription(PING_CHANNEL, PING_STREAM_ID);
        Publication publication = EXCLUSIVE_PUBLICATIONS ? aeron.addExclusivePublication(PONG_CHANNEL, PONG_STREAM_ID) : aeron.addPublication(PONG_CHANNEL, PONG_STREAM_ID)) {
        final BufferClaim bufferClaim = new BufferClaim();
        final FragmentHandler fragmentHandler = (buffer, offset, length, header) -> pingHandler(bufferClaim, publication, buffer, offset, length, header);
        while (running.get()) {
            idleStrategy.idle(subscription.poll(fragmentHandler, FRAME_COUNT_LIMIT));
        }
        System.out.println("Shutting down...");
    }
    CloseHelper.close(driver);
}

Example 23 with Subscription

use of io.aeron.Subscription in project Aeron by real-logic.

the class BasicSubscriber method main.

/**
 * Main method for launching the process.
 *
 * @param args passed to the process.
 */
public static void main(final String[] args) {
    System.out.println("Subscribing to " + CHANNEL + " on stream id " + STREAM_ID);
    final MediaDriver driver = EMBEDDED_MEDIA_DRIVER ? MediaDriver.launchEmbedded() : null;
    final Aeron.Context ctx = new Aeron.Context().availableImageHandler(SamplesUtil::printAvailableImage).unavailableImageHandler(SamplesUtil::printUnavailableImage);
    if (EMBEDDED_MEDIA_DRIVER) {
        ctx.aeronDirectoryName(driver.aeronDirectoryName());
    }
    final FragmentHandler fragmentHandler = SamplesUtil.printAsciiMessage(STREAM_ID);
    final AtomicBoolean running = new AtomicBoolean(true);
    // Register a SIGINT handler for graceful shutdown.
    SigInt.register(() -> running.set(false));
    // clean up resources when this try block is finished
    try (Aeron aeron = Aeron.connect(ctx);
        Subscription subscription = aeron.addSubscription(CHANNEL, STREAM_ID)) {
        SamplesUtil.subscriberLoop(fragmentHandler, FRAGMENT_COUNT_LIMIT, running).accept(subscription);
        System.out.println("Shutting down...");
    }
    CloseHelper.close(driver);
}

Example 24 with Subscription

use of io.aeron.Subscription in project Aeron by real-logic.

the class EmbeddedPingPong method runPing.

private static void runPing(final Aeron aeron) throws InterruptedException {
    System.out.println("Publishing Ping at " + PING_CHANNEL + " on stream id " + PING_STREAM_ID);
    System.out.println("Subscribing Pong at " + PONG_CHANNEL + " on stream id " + PONG_STREAM_ID);
    System.out.println("Message payload length of " + MESSAGE_LENGTH + " bytes");
    System.out.println("Using exclusive publications: " + EXCLUSIVE_PUBLICATIONS);
    final FragmentAssembler dataHandler = new FragmentAssembler(EmbeddedPingPong::pongHandler);
    try (Subscription pongSubscription = aeron.addSubscription(PONG_CHANNEL, PONG_STREAM_ID, EmbeddedPingPong::availablePongImageHandler, null);
        Publication pingPublication = EXCLUSIVE_PUBLICATIONS ? aeron.addExclusivePublication(PING_CHANNEL, PING_STREAM_ID) : aeron.addPublication(PING_CHANNEL, PING_STREAM_ID)) {
        System.out.println("Waiting for new image from Pong...");
        PONG_IMAGE_LATCH.await();
        System.out.format("Warming up... %d iterations of %,d messages%n", WARMUP_NUMBER_OF_ITERATIONS, WARMUP_NUMBER_OF_MESSAGES);
        for (int i = 0; i < WARMUP_NUMBER_OF_ITERATIONS; i++) {
            roundTripMessages(dataHandler, pingPublication, pongSubscription, WARMUP_NUMBER_OF_MESSAGES);
            Thread.yield();
        }
        Thread.sleep(100);
        final ContinueBarrier barrier = new ContinueBarrier("Execute again?");
        do {
            HISTOGRAM.reset();
            System.out.format("Pinging %,d messages%n", NUMBER_OF_MESSAGES);
            roundTripMessages(dataHandler, pingPublication, pongSubscription, NUMBER_OF_MESSAGES);
            System.out.println("Histogram of RTT latencies in microseconds.");
            HISTOGRAM.outputPercentileDistribution(System.out, 1000.0);
        } while (barrier.await());
    }
}

Example 25 with Subscription

use of io.aeron.Subscription in project Aeron by real-logic.

the class ReplayedBasicSubscriber method main.

/**
 * Main method for launching the process.
 *
 * @param args passed to the process.
 */
public static void main(final String[] args) {
    System.out.println("Subscribing to " + CHANNEL + " on stream id " + STREAM_ID);
    final FragmentHandler fragmentHandler = SamplesUtil.printAsciiMessage(STREAM_ID);
    final AtomicBoolean running = new AtomicBoolean(true);
    SigInt.register(() -> running.set(false));
    // Create a unique response stream id so not to clash with other archive clients.
    final AeronArchive.Context archiveCtx = new AeronArchive.Context().controlResponseStreamId(AeronArchive.Configuration.controlResponseStreamId() + 2);
    try (AeronArchive archive = AeronArchive.connect(archiveCtx)) {
        final long recordingId = findLatestRecording(archive);
        final long position = 0L;
        final long length = Long.MAX_VALUE;
        final long sessionId = archive.startReplay(recordingId, position, length, CHANNEL, REPLAY_STREAM_ID);
        final String channel = ChannelUri.addSessionId(CHANNEL, (int) sessionId);
        try (Subscription subscription = archive.context().aeron().addSubscription(channel, REPLAY_STREAM_ID)) {
            SamplesUtil.subscriberLoop(fragmentHandler, FRAGMENT_COUNT_LIMIT, running).accept(subscription);
            System.out.println("Shutting down...");
        }
    }
}