Examples with QueuePolicy com.linkedin.databus.core.DbusEventBuffer.QueuePolicy used on opensource projects

Example 1 with QueuePolicy

use of com.linkedin.databus.core.DbusEventBuffer.QueuePolicy in project databus by linkedin.

the class ReadEventsTestParams method runConstEventsReaderWriter.

// data flow:  emitter/producer/appender -> DEB -> writer -> pipe -> reader -> DEB -> consumer
protected boolean runConstEventsReaderWriter(Vector<DbusEvent> srcTestEvents, Vector<DbusEvent> dstTestEvents, EventBufferTestInput input, DbusEventsStatisticsCollector emitterStats, DbusEventsStatisticsCollector streamStats, DbusEventsStatisticsCollector clientStats, boolean autoStartBuffer) throws Exception {
    LOG.info("starting runConstEventsReaderWriter for " + input.getTestName());
    int numEvents = input.getNumEvents();
    int maxWindowSize = input.getWindowSize();
    DbusEventGenerator evGen = new DbusEventGenerator();
    if (evGen.generateEvents(numEvents, maxWindowSize, 512, input.getPayloadSize(), srcTestEvents) <= 0) {
        return false;
    }
    int eventSize = srcTestEvents.get(0).size();
    long producerBufferSize = input.getProducerBufferSize() * eventSize;
    long sharedBufferSize = input.getSharedBufferSize() * eventSize;
    int stagingBufferSize = input.getStagingBufferSize() * eventSize;
    int individualBufferSize = input.getIndividualBufferSize() * eventSize;
    int indexSize = input.getIndexSize() * eventSize;
    QueuePolicy prodQueuePolicy = input.getProdQueuePolicy();
    QueuePolicy consQueuePolicy = input.getConsQueuePolicy();
    // create the main event buffers
    DbusEventBuffer prodEventBuffer = new DbusEventBuffer(getConfig(producerBufferSize, individualBufferSize, indexSize, stagingBufferSize, AllocationPolicy.HEAP_MEMORY, prodQueuePolicy, input.getProdBufferAssertLevel()));
    DbusEventBuffer consEventBuffer = new DbusEventBuffer(getConfig(sharedBufferSize, individualBufferSize, indexSize, stagingBufferSize, AllocationPolicy.HEAP_MEMORY, consQueuePolicy, input.getConsBufferAssertLevel()));
    // Producer of events, a.k.a. "emitter"
    DbusEventAppender eventProducer = new DbusEventAppender(srcTestEvents, prodEventBuffer, emitterStats, autoStartBuffer);
    // commn channels between reader and writer
    Pipe pipe = Pipe.open();
    Pipe.SinkChannel writerStream = pipe.sink();
    Pipe.SourceChannel readerStream = pipe.source();
    writerStream.configureBlocking(true);
    readerStream.configureBlocking(false);
    // Event writer - Relay in the real world
    int batchSize = input.getBatchSize() * eventSize;
    DbusEventBufferWriter writer = new DbusEventBufferWriter(prodEventBuffer, writerStream, batchSize, streamStats);
    // Event readers - Clients in the real world
    DbusEventBufferConsumer consumer = new DbusEventBufferConsumer(consEventBuffer, numEvents, input.getDeleteInterval(), dstTestEvents);
    Vector<EventBufferConsumer> consList = new Vector<EventBufferConsumer>();
    consList.add(consumer);
    // Event readers - Clients in the real world
    DbusEventBufferReader reader = new DbusEventBufferReader(consEventBuffer, readerStream, consList, clientStats);
    UncaughtExceptionTrackingThread tEmitter = new UncaughtExceptionTrackingThread(eventProducer, "EventProducer");
    UncaughtExceptionTrackingThread tWriter = new UncaughtExceptionTrackingThread(writer, "Writer");
    UncaughtExceptionTrackingThread tReader = new UncaughtExceptionTrackingThread(reader, "Reader");
    UncaughtExceptionTrackingThread tConsumer = new UncaughtExceptionTrackingThread(consumer, "Consumer");
    long emitterWaitms = 20000;
    long writerWaitms = 10000;
    long readerWaitms = 10000;
    long consumerWaitms = readerWaitms;
    // start emitter;
    tEmitter.start();
    // tarnish events written to buffer;
    int[] corruptIndexList = input.getCorruptIndexList();
    if (corruptIndexList.length > 0) {
        tEmitter.join(emitterWaitms);
        EventCorruptionType corruptionType = input.getCorruptionType();
        eventProducer.tarnishEventsInBuffer(corruptIndexList, corruptionType);
    }
    // start  consumer / reader /writer
    tConsumer.start();
    tWriter.start();
    tReader.start();
    // wait until all events have been written;
    dumpEmitterWriterReaderConsumerState(eventProducer, writer, reader, consumer, emitterStats, streamStats, clientStats, dstTestEvents, prodEventBuffer, consEventBuffer);
    LOG.info("runConstEventsReaderWriter(): waiting up to " + (emitterWaitms / 1000) + " sec for appender/producer/emitter thread to terminate");
    tEmitter.join(emitterWaitms);
    // try and set a finish for writer
    long eventsEmitted = eventProducer.eventsEmitted();
    writer.setExpectedEvents(eventsEmitted);
    // wait for writer to finish;
    dumpEmitterWriterReaderConsumerState(eventProducer, writer, reader, consumer, emitterStats, streamStats, clientStats, dstTestEvents, prodEventBuffer, consEventBuffer);
    LOG.info("runConstEventsReaderWriter(): waiting up to " + (writerWaitms / 1000) + " sec for writer thread to terminate");
    tWriter.join(writerWaitms);
    // close the writer Stream;
    dumpEmitterWriterReaderConsumerState(eventProducer, writer, reader, consumer, emitterStats, streamStats, clientStats, dstTestEvents, prodEventBuffer, consEventBuffer);
    LOG.info("runConstEventsReaderWriter(): signalling writer to stop");
    writer.stop();
    if (!tReader.isAlive()) {
        LOG.error("runConstEventsReaderWriter(): reader thread died unexpectedly");
    }
    dumpEmitterWriterReaderConsumerState(eventProducer, writer, reader, consumer, emitterStats, streamStats, clientStats, dstTestEvents, prodEventBuffer, consEventBuffer);
    LOG.info("runConstEventsReaderWriter(): waiting up to " + (consumerWaitms / 1000) + " sec for consumer thread to terminate");
    tConsumer.join(consumerWaitms);
    // stop the consumer thread; may or may not have got all events;
    dumpEmitterWriterReaderConsumerState(eventProducer, writer, reader, consumer, emitterStats, streamStats, clientStats, dstTestEvents, prodEventBuffer, consEventBuffer);
    LOG.info("runConstEventsReaderWriter(): signalling consumer to stop");
    consumer.stop();
    dumpEmitterWriterReaderConsumerState(eventProducer, writer, reader, consumer, emitterStats, streamStats, clientStats, dstTestEvents, prodEventBuffer, consEventBuffer);
    LOG.info("runConstEventsReaderWriter(): signalling reader to stop");
    reader.stop();
    dumpEmitterWriterReaderConsumerState(eventProducer, writer, reader, consumer, emitterStats, streamStats, clientStats, dstTestEvents, prodEventBuffer, consEventBuffer);
    LOG.info("runConstEventsReaderWriter(): all stop.");
    assertEquals(null, consumer.getExceptionThrown());
    LOG.info("runConstEventsReaderWriter() consumer thread: " + (consumer.hasInvalidEvent() ? "DID" : "did NOT") + " receive invalid event(s); num events emitted=" + eventsEmitted + ", events written=" + writer.eventsWritten() + ", events read=" + reader.eventsRead());
    return true;
}