@Test
public void testShouldBlockWhenNotAtHead() throws InterruptedException {
MockQueue q = new MockQueue();
final BlockingEnvelopeMap map = new MockBlockingEnvelopeMap(q);
map.register(SSP, "0");
Thread t =
new Thread(
new Runnable() {
@Override
public void run() {
try {
// Should trigger a take() call.
map.poll(FETCH, -1);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
});
t.setDaemon(true);
t.start();
q.awaitPollTimeout();
t.join(60000);
// 1000 = blocking timeout constant
assertEquals(1000, q.timeout);
assertFalse(t.isAlive());
}
@Test
public void testShouldBlockAtLeast100Ms() throws InterruptedException {
BlockingEnvelopeMap map = new MockBlockingEnvelopeMap();
map.register(SSP, "0");
long now = System.currentTimeMillis();
map.poll(FETCH, 100);
assertTrue(System.currentTimeMillis() - now >= 100);
}
@Test
public void testShouldPollWithATimeout() throws InterruptedException {
MockQueue q = new MockQueue();
// Always use the same time in this test so that we can be sure we get a
// 100ms poll, rather than a 99ms poll (for example). Have to do this
// because BlockingEnvelopeMap calls clock.currentTimeMillis twice, and
// uses the second call to determine the actual poll time.
final BlockingEnvelopeMap map =
new MockBlockingEnvelopeMap(
q,
new Clock() {
private final long NOW = System.currentTimeMillis();
public long currentTimeMillis() {
return NOW;
}
});
map.register(SSP, "0");
Thread t =
new Thread(
new Runnable() {
@Override
public void run() {
try {
// Should trigger a poll(100, TimeUnit.MILLISECONDS) call.
map.poll(FETCH, 100);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
});
t.setDaemon(true);
t.start();
q.awaitPollTimeout();
t.join(60000);
assertEquals(100, q.timeout);
assertFalse(t.isAlive());
}
@Test
public void testEmptyMapReturnsEmptyList() throws InterruptedException {
BlockingEnvelopeMap map = new MockBlockingEnvelopeMap();
map.register(SSP, "0");
map.poll(FETCH, 0);
map.poll(FETCH, 30);
map.setIsAtHead(SSP, true);
map.poll(FETCH, -1);
}
@Test
public void testShouldGetSomeMessages() throws InterruptedException {
BlockingEnvelopeMap map = new MockBlockingEnvelopeMap();
map.register(SSP, "0");
map.put(SSP, envelope);
List<IncomingMessageEnvelope> envelopes = map.poll(FETCH, 0);
assertEquals(1, envelopes.size());
map.put(SSP, envelope);
map.put(SSP, envelope);
envelopes = map.poll(FETCH, 0);
assertEquals(2, envelopes.size());
}
@Test
public void testShouldNotReturnMoreEnvelopesThanAllowed() throws InterruptedException {
BlockingEnvelopeMap map = new MockBlockingEnvelopeMap();
int maxMessages = FETCH.get(SSP);
map.register(SSP, "0");
for (int i = 0; i < 3 * maxMessages; ++i) {
map.put(SSP, envelope);
}
assertEquals(3 * maxMessages, map.getNumMessagesInQueue(SSP));
assertEquals(maxMessages, map.poll(FETCH, 0).size());
assertEquals(2 * maxMessages, map.getNumMessagesInQueue(SSP));
assertEquals(maxMessages, map.poll(FETCH, 30).size());
assertEquals(maxMessages, map.getNumMessagesInQueue(SSP));
assertEquals(maxMessages, map.poll(FETCH, 0).size());
assertEquals(0, map.getNumMessagesInQueue(SSP));
assertEquals(0, map.poll(FETCH, 0).size());
}
