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

Example 11 with Publication

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

the class MultiplePublishersWithFragmentation method main.

/**
 * Main method for launching the process.
 *
 * @param args passed to the process.
 */
public static void main(final String[] args) {
    System.out.println("Publishing to " + CHANNEL + " on stream id " + STREAM_ID_1 + " and stream id " + STREAM_ID_2);
    try (Aeron aeron = Aeron.connect();
        Publication publication1 = aeron.addPublication(CHANNEL, STREAM_ID_1);
        Publication publication2 = aeron.addPublication(CHANNEL, STREAM_ID_2)) {
        int j = 1;
        int k = 1;
        final String message1 = "Hello World! " + j;
        BUFFER_1.putBytes(0, message1.getBytes());
        final String message2 = "Hello World! " + k;
        BUFFER_2.putBytes(0, message2.getBytes());
        while (j <= 5000 || k <= 5000) {
            boolean offerStatus1 = false;
            boolean offerStatus2 = false;
            long result1;
            long result2;
            while (!(offerStatus1 || offerStatus2)) {
                if (j <= 5000) {
                    result1 = publication1.offer(BUFFER_1, 0, BUFFER_1.capacity());
                    if (result1 > 0) {
                        j++;
                        offerStatus1 = true;
                        System.out.println("Successfully sent data on stream id " + STREAM_ID_1 + " and data length " + BUFFER_1.capacity() + " at offset " + result1);
                    } else {
                        if (result1 == Publication.BACK_PRESSURED) {
                            System.out.println(" Offer failed due to back pressure for stream id " + STREAM_ID_1);
                        } else if (result1 == Publication.NOT_CONNECTED) {
                            System.out.println(" Offer failed because publisher is not yet " + "connected to subscriber for stream id " + STREAM_ID_1);
                        } else {
                            System.out.println(" Offer failed due to unexpected reason: " + result1);
                        }
                        offerStatus1 = false;
                    }
                }
                if (k <= 5000) {
                    result2 = publication2.offer(BUFFER_2, 0, BUFFER_2.capacity());
                    if (result2 > 0) {
                        k++;
                        offerStatus2 = true;
                        System.out.println("Successfully sent data on stream id " + STREAM_ID_2 + " and data length " + BUFFER_2.capacity() + " at offset " + result2);
                    } else {
                        if (result2 == Publication.BACK_PRESSURED) {
                            System.out.println(" Offer failed because publisher is not yet " + "connected to subscriber for stream id " + STREAM_ID_2);
                        } else if (result2 == Publication.NOT_CONNECTED) {
                            System.out.println("Offer failed - publisher is not yet connected to subscriber" + STREAM_ID_2);
                        } else {
                            System.out.println("Offer failed due to unexpected reason: " + result2);
                        }
                        offerStatus2 = false;
                    }
                }
            }
        }
        System.out.println("Done sending total messages for stream id " + STREAM_ID_1 + " = " + (j - 1) + " and stream id " + STREAM_ID_2 + " = " + (k - 1));
    }
}

Example 12 with Publication

use of io.aeron.Publication 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 13 with Publication

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

the class BasicPublisher method main.

/**
 * Main method for launching the process.
 *
 * @param args passed to the process.
 * @throws InterruptedException if the thread sleep delay is interrupted.
 */
public static void main(final String[] args) throws InterruptedException {
    System.out.println("Publishing to " + CHANNEL + " on stream id " + STREAM_ID);
    // If configured to do so, create an embedded media driver within this application rather
    // than relying on an external one.
    final MediaDriver driver = EMBEDDED_MEDIA_DRIVER ? MediaDriver.launchEmbedded() : null;
    final Aeron.Context ctx = new Aeron.Context();
    if (EMBEDDED_MEDIA_DRIVER) {
        ctx.aeronDirectoryName(driver.aeronDirectoryName());
    }
    // clean up resources when this try block is finished
    try (Aeron aeron = Aeron.connect(ctx);
        Publication publication = aeron.addPublication(CHANNEL, STREAM_ID)) {
        final UnsafeBuffer buffer = new UnsafeBuffer(BufferUtil.allocateDirectAligned(256, 64));
        for (long i = 0; i < NUMBER_OF_MESSAGES; i++) {
            System.out.print("Offering " + i + "/" + NUMBER_OF_MESSAGES + " - ");
            final int length = buffer.putStringWithoutLengthAscii(0, "Hello World! " + i);
            final long result = publication.offer(buffer, 0, length);
            if (result > 0) {
                System.out.println("yay!");
            } else if (result == Publication.BACK_PRESSURED) {
                System.out.println("Offer failed due to back pressure");
            } else if (result == Publication.NOT_CONNECTED) {
                System.out.println("Offer failed because publisher is not connected to a subscriber");
            } else if (result == Publication.ADMIN_ACTION) {
                System.out.println("Offer failed because of an administration action in the system");
            } else if (result == Publication.CLOSED) {
                System.out.println("Offer failed because publication is closed");
                break;
            } else if (result == Publication.MAX_POSITION_EXCEEDED) {
                System.out.println("Offer failed due to publication reaching its max position");
                break;
            } else {
                System.out.println("Offer failed due to unknown reason: " + result);
            }
            if (!publication.isConnected()) {
                System.out.println("No active subscribers detected");
            }
            Thread.sleep(TimeUnit.SECONDS.toMillis(1));
        }
        System.out.println("Done sending.");
        if (LINGER_TIMEOUT_MS > 0) {
            System.out.println("Lingering for " + LINGER_TIMEOUT_MS + " milliseconds...");
            Thread.sleep(LINGER_TIMEOUT_MS);
        }
    }
    CloseHelper.close(driver);
}

Example 14 with Publication

use of io.aeron.Publication 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 15 with Publication

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

the class ManageRecordingHistoryTest method shouldDetachThenAttachFullSegments.

@Test
@InterruptAfter(10)
void shouldDetachThenAttachFullSegments() {
    final String messagePrefix = "Message-Prefix-";
    final long targetPosition = (SEGMENT_LENGTH * 3L) + 1;
    try (Publication publication = aeronArchive.addRecordedPublication(uriBuilder.build(), STREAM_ID)) {
        final CountersReader counters = aeron.countersReader();
        final int counterId = awaitRecordingCounterId(counters, publication.sessionId());
        final long recordingId = RecordingPos.getRecordingId(counters, counterId);
        offerToPosition(publication, messagePrefix, targetPosition);
        awaitPosition(counters, counterId, publication.position());
        aeronArchive.stopRecording(publication);
        final long startPosition = 0L;
        final long segmentFileBasePosition = AeronArchive.segmentFileBasePosition(startPosition, SEGMENT_LENGTH * 2L, TERM_LENGTH, SEGMENT_LENGTH);
        aeronArchive.detachSegments(recordingId, segmentFileBasePosition);
        assertEquals(segmentFileBasePosition, aeronArchive.getStartPosition(recordingId));
        final long attachSegments = aeronArchive.attachSegments(recordingId);
        assertEquals(2L, attachSegments);
        assertEquals(startPosition, aeronArchive.getStartPosition(recordingId));
    }
}