public void testWaitPolicyForever() throws Exception {
assertEquals(0, SleepyTask.activeTasks.get());
// tasks wait forever
LastRejectedWaitPolicy policy = new LastRejectedWaitPolicy(-1, TimeUnit.SECONDS);
executor.setRejectedExecutionHandler(policy);
// create tasks
List tasks = new ArrayList();
// task 1 runs immediately
tasks.add(new SleepyTask("run", 1000));
// task 2 is queued
tasks.add(new SleepyTask("queued", 1000));
// task 3 is initially rejected but waits forever
Runnable waiting = new SleepyTask("waitingForever", 1000);
tasks.add(waiting);
// submit tasks
LinkedList submitters = this.execute(tasks);
assertFalse(submitters.isEmpty());
// the last task should have been queued
assertFalse(executor.awaitTermination(4000, TimeUnit.MILLISECONDS));
assertSame(waiting, policy.lastRejectedRunnable());
assertEquals(0, SleepyTask.activeTasks.get());
}
public void testWaitPolicyWithTimeout() throws Exception {
assertEquals(0, SleepyTask.activeTasks.get());
// set a reasonable retry interval
LastRejectedWaitPolicy policy = new LastRejectedWaitPolicy(2500, TimeUnit.MILLISECONDS);
executor.setRejectedExecutionHandler(policy);
// create tasks
List tasks = new ArrayList();
// task 1 runs immediately
tasks.add(new SleepyTask("run", 1000));
// task 2 is queued
tasks.add(new SleepyTask("queued", 1000));
// task 3 is initially rejected but will eventually succeed
Runnable waiting = new SleepyTask("waiting", 1000);
tasks.add(waiting);
// submit tasks
LinkedList submitters = this.execute(tasks);
assertFalse(submitters.isEmpty());
assertFalse(executor.awaitTermination(5000, TimeUnit.MILLISECONDS));
assertSame(waiting, policy.lastRejectedRunnable());
assertEquals(0, SleepyTask.activeTasks.get());
}
public void testWaitPolicyWithShutdownExecutor() throws Exception {
assertEquals(0, SleepyTask.activeTasks.get());
// wants to wait forever, but will fail immediately
executor.setRejectedExecutionHandler(new LastRejectedWaitPolicy());
executor.shutdown();
// create a task
List tasks = new ArrayList();
tasks.add(new SleepyTask("rejected", 1000));
// should fail and return immediately
LinkedList submitters = this.execute(tasks);
assertFalse(submitters.isEmpty());
// let submitted tasks run
Thread.sleep(1000);
LinkedList exceptions = threadGroup.collectedExceptions();
assertEquals(1, exceptions.size());
Map.Entry threadFailure =
(Map.Entry) ((Map) (exceptions.getFirst())).entrySet().iterator().next();
assertEquals(submitters.getFirst(), threadFailure.getKey());
assertEquals(RejectedExecutionException.class, threadFailure.getValue().getClass());
assertEquals(0, SleepyTask.activeTasks.get());
}
public void testWaitPolicyWithTimeoutFailure() throws Exception {
assertEquals(0, SleepyTask.activeTasks.get());
// set a really short wait interval
long failureInterval = 100L;
LastRejectedWaitPolicy policy =
new LastRejectedWaitPolicy(failureInterval, TimeUnit.MILLISECONDS);
executor.setRejectedExecutionHandler(policy);
// create tasks
List tasks = new ArrayList();
// task 1 runs immediately
tasks.add(new SleepyTask("run", 1000));
// task 2 is queued
tasks.add(new SleepyTask("queued", 1000));
// task 3 is initially rejected & will retry but should fail quickly
Runnable failedTask = new SleepyTask("waitAndFail", 1000);
tasks.add(failedTask);
// submit tasks
LinkedList submitters = this.execute(tasks);
assertFalse(submitters.isEmpty());
// give failure a chance
Thread.sleep(failureInterval * 10);
// make sure there was one failure
LinkedList exceptions = threadGroup.collectedExceptions();
assertEquals(1, exceptions.size());
// make sure the failed task was the right one
Map.Entry threadFailure =
(Map.Entry) ((Map) (exceptions.getFirst())).entrySet().iterator().next();
assertEquals(submitters.getLast(), threadFailure.getKey());
assertEquals(RejectedExecutionException.class, threadFailure.getValue().getClass());
executor.shutdown();
assertTrue(executor.awaitTermination(2500, TimeUnit.MILLISECONDS));
assertSame(failedTask, policy.lastRejectedRunnable());
assertEquals(0, SleepyTask.activeTasks.get());
}