public void ShouldBlockProducerUntilAllEventProcessorsHaveAdvanced()
{
var delayedEventHandler = CreateDelayedEventHandler();
_disruptor.HandleEventsWith(delayedEventHandler);
var ringBuffer = _disruptor.Start();
delayedEventHandler.AwaitStart();
var stubPublisher = new StubPublisher(ringBuffer);
try
{
_executor.Execute(() => stubPublisher.Run());
AssertProducerReaches(stubPublisher, 4, true);
delayedEventHandler.ProcessEvent();
delayedEventHandler.ProcessEvent();
delayedEventHandler.ProcessEvent();
delayedEventHandler.ProcessEvent();
delayedEventHandler.ProcessEvent();
AssertProducerReaches(stubPublisher, 5, false);
}
finally
{
stubPublisher.Halt();
}
}
private static void AssertProducerReaches(StubPublisher stubPublisher, int expectedPublicationCount, bool strict)
{
var loopStart = DateTime.UtcNow;
while (stubPublisher.GetPublicationCount() < expectedPublicationCount && DateTime.UtcNow - loopStart < TimeSpan.FromMilliseconds(5))
{
Thread.Yield();
}
if (strict)
{
Assert.That(stubPublisher.GetPublicationCount(), Is.EqualTo(expectedPublicationCount));
}
else
{
var actualPublicationCount = stubPublisher.GetPublicationCount();
Assert.IsTrue(actualPublicationCount >= expectedPublicationCount, "Producer reached unexpected count. Expected at least " + expectedPublicationCount + " but only reached " + actualPublicationCount);
}
}