/**
* Verifies that getting a value which is expired will return <code>null</code>.
*
* @throws Exception
*/
@Test
public void getExpiredValue() throws Exception {
Time start = Time.now();
Duration timeout = Duration.milliseconds(50);
StoredResponsesMap map = new StoredResponsesMap(1000, timeout);
assertEquals(0, map.size());
map.put("1", new BufferedWebResponse(null));
assertEquals(1, map.size());
TimeUnit.MILLISECONDS.sleep(
timeout.getMilliseconds() * 2); // sleep for twice longer than the timeout
assertTrue("The timeout has passed.", Time.now().subtract(start).compareTo(timeout) == 1);
Object value = map.get("1");
assertNull(value);
}
/**
* https://issues.apache.org/jira/browse/WICKET-5316
*
* @throws Exception
*/
@Test
public void failToReleaseUnderLoad() throws Exception {
final Duration duration = Duration.seconds(20); /* seconds */
final ConcurrentLinkedQueue<Exception> errors = new ConcurrentLinkedQueue<Exception>();
final long endTime = System.currentTimeMillis() + duration.getMilliseconds();
// set the synchronizer timeout one second longer than the test runs to prevent
// starvation to become an issue
final PageAccessSynchronizer sync =
new PageAccessSynchronizer(duration.add(Duration.ONE_SECOND));
final CountDownLatch latch = new CountDownLatch(100);
for (int count = 0; count < 100; count++) {
new Thread() {
@Override
public void run() {
try {
while (System.currentTimeMillis() < endTime) {
try {
logger.debug(Thread.currentThread().getName() + " locking");
sync.lockPage(0);
Thread.sleep(1);
logger.debug(Thread.currentThread().getName() + " locked");
sync.unlockAllPages();
logger.debug(Thread.currentThread().getName() + " unlocked");
Thread.sleep(5);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
} catch (Exception e) {
logger.error(e.getMessage(), e);
errors.add(e);
} finally {
latch.countDown();
}
}
}.start();
}
latch.await();
if (!errors.isEmpty()) {
logger.error("Number of lock errors that occurred: {}", errors.size());
throw errors.remove();
}
}
