@Test(expected = IllegalStateException.class)
public void shouldThrowExceptionIfStartIsCalledTwice() throws Exception {
executor.ignoreExecutions();
disruptor.handleEventsWith(new SleepingEventHandler());
disruptor.start();
disruptor.start();
}
@Test(expected = IllegalStateException.class)
public void shouldThrowExceptionWhenAddingEventProcessorsAfterTheProducerBarrierHasBeenCreated()
throws Exception {
executor.ignoreExecutions();
disruptor.handleEventsWith(new SleepingEventHandler());
disruptor.start();
disruptor.handleEventsWith(new SleepingEventHandler());
}
@Test
public void shouldCreateEventProcessorGroupForFirstEventProcessors() throws Exception {
executor.ignoreExecutions();
final EventHandler<TestEvent> eventHandler1 = new SleepingEventHandler();
EventHandler<TestEvent> eventHandler2 = new SleepingEventHandler();
final EventHandlerGroup<TestEvent> eventHandlerGroup =
disruptor.handleEventsWith(eventHandler1, eventHandler2);
disruptor.start();
assertNotNull(eventHandlerGroup);
assertThat(Integer.valueOf(executor.getExecutionCount()), equalTo(Integer.valueOf(2)));
}
private TestEvent publishEvent() {
if (ringBuffer == null) {
ringBuffer = disruptor.start();
}
disruptor.publishEvent(
new EventTranslator<TestEvent>() {
@Override
public TestEvent translateTo(final TestEvent event, final long sequence) {
lastPublishedEvent = event;
return event;
}
});
return lastPublishedEvent;
}
@Test
public void shouldBlockProducerUntilAllEventProcessorsHaveAdvanced() throws Exception {
final DelayedEventHandler delayedEventHandler = createDelayedEventHandler();
disruptor.handleEventsWith(delayedEventHandler);
final RingBuffer<TestEvent> ringBuffer = disruptor.start();
final StubPublisher stubPublisher = new StubPublisher(ringBuffer);
try {
executor.execute(stubPublisher);
assertProducerReaches(stubPublisher, 4, true);
delayedEventHandler.processEvent();
delayedEventHandler.processEvent();
delayedEventHandler.processEvent();
delayedEventHandler.processEvent();
delayedEventHandler.processEvent();
assertProducerReaches(stubPublisher, 5, false);
} finally {
stubPublisher.halt();
}
}