public void testDelayedTasksThatFiredAtTheSameTimeAreExecutedConcurrently()
throws InterruptedException, ExecutionException {
final AppScheduledExecutorService service = new AppScheduledExecutorService(getName());
final List<LogInfo> log = Collections.synchronizedList(new ArrayList<>());
int delay = 500;
int N = 20;
List<? extends Future<?>> futures =
ContainerUtil.map(
Collections.nCopies(N, ""),
__ ->
service.schedule(
() -> {
log.add(new LogInfo(0));
TimeoutUtil.sleep(10 * 1000);
},
delay,
TimeUnit.MILLISECONDS));
for (Future<?> future : futures) {
future.get();
}
assertEquals(N, log.size());
Set<Thread> usedThreads = ContainerUtil.map2Set(log, logInfo -> logInfo.currentThread);
assertEquals(N, usedThreads.size());
service.shutdownAppScheduledExecutorService();
assertTrue(service.awaitTermination(10, TimeUnit.SECONDS));
}
public void testMustNotBeAbleToShutdown() {
final AppScheduledExecutorService service = new AppScheduledExecutorService(getName());
try {
service.shutdown();
fail();
} catch (Exception ignored) {
}
try {
service.shutdownNow();
fail();
} catch (Exception ignored) {
} finally {
service.shutdownAppScheduledExecutorService();
}
}
public void testAwaitTerminationMakesSureTasksTransferredToBackendExecutorAreFinished()
throws InterruptedException, ExecutionException {
final AppScheduledExecutorService service = new AppScheduledExecutorService(getName());
final List<LogInfo> log = Collections.synchronizedList(new ArrayList<>());
int N = 20;
int delay = 500;
List<? extends Future<?>> futures =
ContainerUtil.map(
Collections.nCopies(N, ""),
s ->
service.schedule(
() -> {
TimeoutUtil.sleep(5000);
log.add(new LogInfo(0));
},
delay,
TimeUnit.MILLISECONDS));
TimeoutUtil.sleep(delay);
long start = System.currentTimeMillis();
while (!service.delayQueue.isEmpty() && System.currentTimeMillis() < start + 20000) {
// wait till all tasks transferred to backend
}
List<SchedulingWrapper.MyScheduledFutureTask> queuedTasks = new ArrayList<>(service.delayQueue);
if (!queuedTasks.isEmpty()) {
String s =
queuedTasks
.stream()
.map(BoundedTaskExecutor::info)
.collect(Collectors.toList())
.toString();
fail("Queued tasks left: " + s + ";\n" + queuedTasks);
}
service.shutdownAppScheduledExecutorService();
assertTrue(service.awaitTermination(20, TimeUnit.SECONDS));
for (Future<?> future : futures) {
assertTrue(future.isDone());
}
assertEquals(log.toString(), N, log.size());
}
public void testDelayedWorks() throws InterruptedException {
final AppScheduledExecutorService service = new AppScheduledExecutorService(getName());
final List<LogInfo> log = Collections.synchronizedList(new ArrayList<>());
assertFalse(service.isShutdown());
assertFalse(service.isTerminated());
service.invokeAll(
Collections.nCopies(
service.getBackendPoolCorePoolSize() + 1,
Executors.callable(EmptyRunnable.getInstance()))); // pre-start all threads
int delay = 1000;
long start = System.currentTimeMillis();
ScheduledFuture<?> f1 =
service.schedule(
() -> {
log.add(new LogInfo(1));
TimeoutUtil.sleep(10);
},
delay,
TimeUnit.MILLISECONDS);
assertFalse(service.isShutdown());
assertFalse(service.isTerminated());
ScheduledFuture<?> f2 =
service.schedule(
() -> {
log.add(new LogInfo(2));
TimeoutUtil.sleep(10);
},
delay,
TimeUnit.MILLISECONDS);
assertFalse(service.isShutdown());
assertFalse(service.isTerminated());
ScheduledFuture<?> f3 =
service.schedule(
() -> {
log.add(new LogInfo(3));
TimeoutUtil.sleep(10);
},
delay,
TimeUnit.MILLISECONDS);
assertFalse(service.isShutdown());
assertFalse(service.isTerminated());
Future<?> f4 = service.submit((Runnable) () -> log.add(new LogInfo(4)));
assertFalse(service.isShutdown());
assertFalse(service.isTerminated());
assertFalse(f1.isDone());
assertFalse(f2.isDone());
assertFalse(f3.isDone());
TimeoutUtil.sleep(delay / 2);
long elapsed = System.currentTimeMillis() - start; // can be > delay/2 on overloaded agent
assertEquals(String.valueOf(f1.isDone()), elapsed > delay, f1.isDone());
assertEquals(String.valueOf(f2.isDone()), elapsed > delay, f2.isDone());
assertEquals(String.valueOf(f3.isDone()), elapsed > delay, f3.isDone());
assertTrue(f4.isDone());
TimeoutUtil.sleep(delay / 2 + 500);
assertTrue(f1.isDone());
assertTrue(f2.isDone());
assertTrue(f3.isDone());
assertTrue(f4.isDone());
assertEquals(4, log.size());
assertEquals(4, log.get(0).runnable);
List<Thread> threads =
Arrays.asList(log.get(1).currentThread, log.get(2).currentThread, log.get(3).currentThread);
assertEquals(
threads.toString(), 3, new HashSet<>(threads).size()); // must be executed in parallel
service.shutdownAppScheduledExecutorService();
assertTrue(service.awaitTermination(10, TimeUnit.SECONDS));
}
public void testDelayedTasksReusePooledThreadIfExecuteAtDifferentTimes()
throws InterruptedException, ExecutionException {
final AppScheduledExecutorService service = new AppScheduledExecutorService(getName());
final List<LogInfo> log = Collections.synchronizedList(new ArrayList<>());
// pre-start one thread
Future<?> future = service.submit(EmptyRunnable.getInstance());
future.get();
service.setBackendPoolCorePoolSize(1);
assertEquals(1, service.getBackendPoolExecutorSize());
int delay = 500;
ScheduledFuture<?> f1 =
service.schedule((Runnable) () -> log.add(new LogInfo(1)), delay, TimeUnit.MILLISECONDS);
ScheduledFuture<?> f2 =
service.schedule(
(Runnable) () -> log.add(new LogInfo(2)), delay + 100, TimeUnit.MILLISECONDS);
ScheduledFuture<?> f3 =
service.schedule(
(Runnable) () -> log.add(new LogInfo(3)), delay + 200, TimeUnit.MILLISECONDS);
assertEquals(1, service.getBackendPoolExecutorSize());
assertFalse(f1.isDone());
assertFalse(f2.isDone());
assertFalse(f3.isDone());
TimeoutUtil.sleep(delay + 200 + 300);
assertTrue(f1.isDone());
assertTrue(f2.isDone());
assertTrue(f3.isDone());
assertEquals(1, service.getBackendPoolExecutorSize());
assertEquals(3, log.size());
Set<Thread> usedThreads =
new HashSet<>(
Arrays.asList(
log.get(0).currentThread, log.get(1).currentThread, log.get(2).currentThread));
if (usedThreads.size() != 1) {
System.err.println(ThreadDumper.dumpThreadsToString());
}
assertEquals(usedThreads.toString(), 1, usedThreads.size()); // must be executed in same thread
service.shutdownAppScheduledExecutorService();
assertTrue(service.awaitTermination(10, TimeUnit.SECONDS));
}
