@Test
public void testCancelled() throws InterruptedException, ExecutionException {
Task<List<?>> t =
Tasks.sequential(sayTask("1"), sayTask("2a", Duration.THIRTY_SECONDS, "2b"), sayTask("3"));
ec.submit(t);
synchronized (messages) {
while (messages.size() <= 1) messages.wait();
}
Assert.assertEquals(messages, Arrays.asList("1", "2a"));
Time.sleep(Duration.millis(50));
t.cancel(true);
Assert.assertTrue(t.isDone());
// 2 should get cancelled, and invoke the cancellation semaphore
// 3 should get cancelled and not run at all
Assert.assertEquals(messages, Arrays.asList("1", "2a"));
// Need to ensure that 2 has been started; race where we might cancel it before its run method
// is even begun. Hence doing "2a; pause; 2b" where nothing is interruptable before pause.
Assert.assertTrue(cancellations.tryAcquire(10, TimeUnit.SECONDS));
Iterator<Task<?>> ci = ((HasTaskChildren) t).getChildren().iterator();
Assert.assertEquals(ci.next().get(), "1");
Task<?> task2 = ci.next();
Assert.assertTrue(task2.isBegun());
Assert.assertTrue(task2.isDone());
Assert.assertTrue(task2.isCancelled());
Task<?> task3 = ci.next();
Assert.assertFalse(task3.isBegun());
Assert.assertTrue(task2.isDone());
Assert.assertTrue(task2.isCancelled());
// but we do _not_ get a mutex from task3 as it does not run (is not interrupted)
Assert.assertEquals(cancellations.availablePermits(), 0);
}
@SuppressWarnings("deprecation")
protected void beforeStart(Map flags, Task<?> task) {
activeTaskCount.incrementAndGet();
// set thread _before_ start time, so we won't get a null thread when there is a start-time
if (log.isTraceEnabled()) log.trace("" + this + " beforeStart, task: " + task);
if (!task.isCancelled()) {
((BasicTask) task).thread = Thread.currentThread();
if (RENAME_THREADS) {
String newThreadName =
"brooklyn-"
+ CaseFormat.LOWER_HYPHEN.to(
CaseFormat.LOWER_CAMEL, task.getDisplayName().replace(" ", ""))
+ "-"
+ task.getId().substring(0, 8);
((BasicTask) task).thread.setName(newThreadName);
}
PerThreadCurrentTaskHolder.perThreadCurrentTask.set(task);
((BasicTask) task).startTimeUtc = System.currentTimeMillis();
}
for (Object to : (Collection) flags.get("tagLinkedPreprocessors")) {
TaskPreprocessor t = (TaskPreprocessor) to;
t.onStart(flags, task);
}
ExecutionUtils.invoke(flags.get("newTaskStartCallback"), task);
}
protected void beforeStart(Map<?, ?> flags, Task<?> task) {
activeTaskCount.incrementAndGet();
// set thread _before_ start time, so we won't get a null thread when there is a start-time
if (log.isTraceEnabled()) log.trace("" + this + " beforeStart, task: " + task);
if (!task.isCancelled()) {
((TaskInternal<?>) task).setThread(Thread.currentThread());
if (RENAME_THREADS) {
String newThreadName =
"brooklyn-"
+ CaseFormat.LOWER_HYPHEN.to(
CaseFormat.LOWER_CAMEL, task.getDisplayName().replace(" ", ""))
+ "-"
+ task.getId().substring(0, 8);
task.getThread().setName(newThreadName);
}
PerThreadCurrentTaskHolder.perThreadCurrentTask.set(task);
((TaskInternal<?>) task).setStartTimeUtc(System.currentTimeMillis());
}
ExecutionUtils.invoke(flags.get("newTaskStartCallback"), task);
}
