@Test
public void shouldSetAndClearAlertStatus() {
SequenceBarrier sequenceBarrier = ringBuffer.newBarrier();
assertFalse(sequenceBarrier.isAlerted());
sequenceBarrier.alert();
assertTrue(sequenceBarrier.isAlerted());
sequenceBarrier.clearAlert();
assertFalse(sequenceBarrier.isAlerted());
}
@Test
public void shouldInterruptDuringBusySpin() throws Exception {
final long expectedNumberMessages = 10;
fillRingBuffer(expectedNumberMessages);
final CountDownLatch latch = new CountDownLatch(3);
final Sequence sequence1 = new CountDownLatchSequence(8L, latch);
final Sequence sequence2 = new CountDownLatchSequence(8L, latch);
final Sequence sequence3 = new CountDownLatchSequence(8L, latch);
context.checking(
new Expectations() {
{
one(eventProcessor1).getSequence();
will(returnValue(sequence1));
one(eventProcessor2).getSequence();
will(returnValue(sequence2));
one(eventProcessor3).getSequence();
will(returnValue(sequence3));
}
});
final SequenceBarrier sequenceBarrier =
ringBuffer.newBarrier(
Util.getSequencesFor(eventProcessor1, eventProcessor2, eventProcessor3));
final boolean[] alerted = {false};
Thread t =
new Thread(
new Runnable() {
public void run() {
try {
sequenceBarrier.waitFor(expectedNumberMessages - 1);
} catch (AlertException e) {
alerted[0] = true;
} catch (InterruptedException e) {
// don't care
}
}
});
t.start();
latch.await(3, TimeUnit.SECONDS);
sequenceBarrier.alert();
t.join();
assertTrue("Thread was not interrupted", alerted[0]);
}
@Override
public void halt() {
running.set(false);
sequenceBarrier.alert();
}
