com.lmax.disruptor.BusySpinWaitStrategy Java Examples

@Override
public void afterPropertiesSet() throws Exception {
	if ("BusySpinWaitStrategy".equals(waitStrategy)) {
		disruptor = new Disruptor<FastEvent>(new FastEventFactory(), 65536, DaemonThreadFactory.INSTANCE,
				ProducerType.MULTI, new BusySpinWaitStrategy());
	} else if ("SleepingWaitStrategy".equals(waitStrategy)) {
		disruptor = new Disruptor<FastEvent>(new FastEventFactory(), 65536, DaemonThreadFactory.INSTANCE,
				ProducerType.MULTI, new SleepingWaitStrategy());
	} else if ("BlockingWaitStrategy".equals(waitStrategy)) {
		disruptor = new Disruptor<FastEvent>(new FastEventFactory(), 65536, DaemonThreadFactory.INSTANCE,
				ProducerType.MULTI, new BlockingWaitStrategy());
	} else {
		disruptor = new Disruptor<FastEvent>(new FastEventFactory(), 65536, DaemonThreadFactory.INSTANCE,
				ProducerType.MULTI, new YieldingWaitStrategy());
	}
	ringBuffer = disruptor.start();
}
 

static WaitStrategy createWaitStrategy(final String propertyName, final long timeoutMillis) {
    final String strategy = PropertiesUtil.getProperties().getStringProperty(propertyName, "TIMEOUT");
    LOGGER.trace("property {}={}", propertyName, strategy);
    final String strategyUp = strategy.toUpperCase(Locale.ROOT); // TODO Refactor into Strings.toRootUpperCase(String)
    switch (strategyUp) { // TODO Define a DisruptorWaitStrategy enum?
    case "SLEEP":
        return new SleepingWaitStrategy();
    case "YIELD":
        return new YieldingWaitStrategy();
    case "BLOCK":
        return new BlockingWaitStrategy();
    case "BUSYSPIN":
        return new BusySpinWaitStrategy();
    case "TIMEOUT":
        return new TimeoutBlockingWaitStrategy(timeoutMillis, TimeUnit.MILLISECONDS);
    default:
        return new TimeoutBlockingWaitStrategy(timeoutMillis, TimeUnit.MILLISECONDS);
    }
}
 

/**
 * Starts a background thread to process events
 */
public void start() {
  if (disruptor == null) {
    disruptor = new Disruptor<BufferEvent>(BufferEvent::new, queueDepth, threadFactory,
        ProducerType.SINGLE, new BusySpinWaitStrategy());

    // Connect the handler
    disruptor.handleEventsWith(eventHandler);

    // Start the Disruptor, starts all threads running
    disruptor.start();

    ringBuffer = disruptor.getRingBuffer();
  }
}
 

@Override
protected void configure() {
    switch (config.getWaitStrategyEnum()) {
    // A low-cpu usage Disruptor configuration for using in local/test environments
    case LOW_CPU:
         bind(WaitStrategy.class).annotatedWith(Names.named("PersistenceStrategy")).to(BlockingWaitStrategy.class);
         bind(WaitStrategy.class).annotatedWith(Names.named("ReplyStrategy")).to(BlockingWaitStrategy.class);
         bind(WaitStrategy.class).annotatedWith(Names.named("RetryStrategy")).to(BlockingWaitStrategy.class);
         break;
    // The default high-cpu usage Disruptor configuration for getting high throughput on production environments
    case HIGH_THROUGHPUT:
    default:
         bind(WaitStrategy.class).annotatedWith(Names.named("PersistenceStrategy")).to(BusySpinWaitStrategy.class);
         bind(WaitStrategy.class).annotatedWith(Names.named("ReplyStrategy")).to(BusySpinWaitStrategy.class);
         bind(WaitStrategy.class).annotatedWith(Names.named("RetryStrategy")).to(YieldingWaitStrategy.class);
         break;
    }

    if (config.getLowLatency()) {
        bind(RequestProcessor.class).to(RequestProcessorSkipCT.class).in(Singleton.class);
        bind(PersistenceProcessor.class).to(PersitenceProcessorNullImpl.class).in(Singleton.class);
    } else {
        bind(PersistenceProcessor.class).to(PersistenceProcessorImpl.class).in(Singleton.class);
        bind(RequestProcessor.class).to(RequestProcessorPersistCT.class).in(Singleton.class);
    }

    bind(ReplyProcessor.class).to(ReplyProcessorImpl.class).in(Singleton.class);
    bind(RetryProcessor.class).to(RetryProcessorImpl.class).in(Singleton.class);

}
 

@Setup
public synchronized void setup() throws InterruptedException
{
    for (int i = 0; i < MAX_THREAD_COUNT; i++)
    {
        responseQueues[i] = new OneToOneConcurrentArrayQueue<>(RESPONSE_QUEUE_CAPACITY);
    }

    values = new int[burstLength];
    for (int i = 0; i < burstLength; i++)
    {
        values[i] = -(burstLength - i);
    }

    handler = new Handler(responseQueues);

    disruptor = new Disruptor<>(
        Message::new,
        Configuration.SEND_QUEUE_CAPACITY,
        (ThreadFactory)Thread::new,
        ProducerType.MULTI,
        new BusySpinWaitStrategy());

    disruptor.handleEventsWith(handler);
    disruptor.start();

    handler.waitForStart();
}
 

@Test
public void test_All_WaitStrategies() {
	assertTrue(WaitStrategyType.BLOCKING.instance() instanceof BlockingWaitStrategy);
	assertTrue(WaitStrategyType.BUSY_SPIN.instance() instanceof BusySpinWaitStrategy);
	assertTrue(WaitStrategyType.LITE_BLOCKING.instance() instanceof LiteBlockingWaitStrategy);
	assertTrue(WaitStrategyType.SLEEPING_WAIT.instance() instanceof SleepingWaitStrategy);
	assertTrue(WaitStrategyType.YIELDING.instance() instanceof YieldingWaitStrategy);
}
 

@Before
public void setUp() throws Exception {
    waitStrategy = new BusySpinWaitStrategy();
}