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

Example 26 with Subscription

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

the class SamplesUtil method printAvailableImage.

/**
     * Print the information for an available image to stdout.
     *
     * @param image that has been created
     */
public static void printAvailableImage(final Image image) {
    final Subscription subscription = image.subscription();
    System.out.println(String.format("Available image on %s streamId=%d sessionId=%d from %s", subscription.channel(), subscription.streamId(), image.sessionId(), image.sourceIdentity()));
}

Example 27 with Subscription

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

the class SamplesUtil method printUnavailableImage.

/**
     * Print the information for an unavailable image to stdout.
     *
     * @param image that has gone inactive
     */
public static void printUnavailableImage(final Image image) {
    final Subscription subscription = image.subscription();
    System.out.println(String.format("Unavailable image on %s streamId=%d sessionId=%d", subscription.channel(), subscription.streamId(), image.sessionId()));
}

Example 28 with Subscription

use of io.aeron.Subscription in project nd4j by deeplearning4j.

the class AeronNDArraySubscriber method launch.

/**
 * Launch a background thread
 * that subscribes to  the aeron context
 * @throws Exception
 */
public void launch() throws Exception {
    if (init.get())
        return;
    // Register a SIGINT handler for graceful shutdown.
    if (!init.get())
        init();
    log.info("Subscribing to " + channel + " on stream Id " + streamId);
    log.info("Using aeron directory " + ctx.aeronDirectoryName());
    // Register a SIGINT handler for graceful shutdown.
    SigInt.register(() -> running.set(false));
    if (channel == null)
        throw new IllegalStateException("No channel for subscriber defined");
    if (streamId <= 0)
        throw new IllegalStateException("No stream for subscriber defined");
    if (aeron == null)
        throw new IllegalStateException("No aeron instance defined");
    boolean started = false;
    while (!started) {
        try (final Subscription subscription = aeron.addSubscription(channel, streamId)) {
            this.subscription = subscription;
            log.info("Beginning subscribe on channel " + channel + " and stream " + streamId);
            AeronUtil.subscriberLoop(new FragmentAssembler(new NDArrayFragmentHandler(ndArrayCallback)), fragmentLimitCount, running, launched).accept(subscription);
            started = true;
        } catch (Exception e) {
            log.warn("Unable to connect...trying again on channel " + channel, e);
        }
    }
}

Example 29 with Subscription

use of io.aeron.Subscription in project nd4j by deeplearning4j.

the class AeronNDArrayResponder method launch.

/**
 * Launch a background thread
 * that subscribes to  the aeron context
 * @throws Exception
 */
public void launch() throws Exception {
    if (init.get())
        return;
    // Register a SIGINT handler for graceful shutdown.
    if (!init.get())
        init();
    log.info("Subscribing to " + channel + " on stream Id " + streamId);
    // Register a SIGINT handler for graceful shutdown.
    SigInt.register(() -> running.set(false));
    // Create an Aeron instance with client-provided context configuration, connect to the
    // media driver, and add a subscription for the given channel and stream using the supplied
    // dataHandler method, which will be called with new messages as they are received.
    // The Aeron and Subscription classes implement AutoCloseable, and will automatically
    // clean up resources when this try block is finished.
    // Note here that we are either creating 1 or 2 subscriptions.
    // The first one is a  normal 1 subscription listener.
    // The second one is when we want to send responses
    boolean started = false;
    int numTries = 0;
    while (!started && numTries < 3) {
        try {
            try (final Subscription subscription = aeron.addSubscription(channel, streamId)) {
                log.info("Beginning subscribe on channel " + channel + " and stream " + streamId);
                AeronUtil.subscriberLoop(new FragmentAssembler(NDArrayResponseFragmentHandler.builder().aeron(aeron).context(ctx).streamId(responseStreamId).holder(ndArrayHolder).build()), fragmentLimitCount, running, launched).accept(subscription);
                started = true;
            }
        } catch (Exception e) {
            numTries++;
            log.warn("Failed to connect..trying again", e);
        }
    }
    if (numTries >= 3)
        throw new IllegalStateException("Was unable to start responder after " + numTries + "tries");
}

Example 30 with Subscription

use of io.aeron.Subscription in project nd4j by deeplearning4j.

the class AeronUtil method printAvailableImage.

/**
 * Print the information for an available image to stdout.
 *
 * @param image that has been created
 */
public static void printAvailableImage(final Image image) {
    final Subscription subscription = image.subscription();
    System.out.println(String.format("Available image on %s streamId=%d sessionId=%d from %s", subscription.channel(), subscription.streamId(), image.sessionId(), image.sourceIdentity()));
}