@Test
public void limitedExecute() {
final List<Runnable> jobs = Lists.newArrayList();
final AsyncCompleter completion =
new AsyncCompleter.Builder(
new Executor() {
public void execute(final Runnable command) {
jobs.add(command);
}
})
.handleExceptions(Policies.THROW)
.limitParallelExecutionTo(1);
final Iterable<Integer> queued =
completion.invokeAll(ImmutableList.of(callable(1), callable(2), callable(3)));
final Iterator<Integer> iterator = queued.iterator();
assertEquals(1, jobs.size());
// can't test that hasNext() will block, but it should
jobs.get(0).run();
assertEquals(2, jobs.size());
// can test that next() will not block anymore
assertEquals(1, iterator.next().intValue());
jobs.get(1).run();
assertEquals(3, jobs.size());
assertEquals(2, iterator.next().intValue());
jobs.get(2).run();
assertEquals(3, jobs.size());
assertEquals(3, iterator.next().intValue());
assertFalse(iterator.hasNext());
}
@Test
public void callableCompletedBeforeTimeout() {
final AsyncCompleter completion = new AsyncCompleter.Builder(new CallerExecutor()).build();
final ImmutableList<Callable<Integer>> input = ImmutableList.of(sleeper(1, 2));
final Integer value = completion.invokeAll(input, 1, TimeUnit.NANOSECONDS).iterator().next();
assertEquals(1, value.intValue());
}
@Test
public void nullFirstFiltered() {
final AsyncCompleter completion = new AsyncCompleter.Builder(new CallerExecutor()).build();
final ImmutableList<Callable<Integer>> input =
ImmutableList.of(callable((Integer) null), callable(2));
final Iterator<Integer> queued = completion.invokeAll(input).iterator();
assertEquals(2, queued.next().intValue());
assertFalse(queued.hasNext());
}
@Test
public void order() {
final AsyncCompleter completion = new AsyncCompleter.Builder(new CallerExecutor()).build();
final Iterator<Integer> queued =
completion.invokeAll(ImmutableList.of(callable(1), callable(2))).iterator();
assertEquals(1, queued.next().intValue());
assertEquals(2, queued.next().intValue());
assertFalse(queued.hasNext());
}
@Test(expected = RuntimeTimeoutException.class)
public void callableTimedOutBeforeCompleting() {
final AsyncCompleter completion = new AsyncCompleter.Builder(new NaiveExecutor()).build();
// should reach timeout before completing
completion
.invokeAll(ImmutableList.of(sleeper(1, 10)), 1, TimeUnit.NANOSECONDS)
.iterator()
.next();
}
@Test
public void singleExecute() {
final AtomicInteger count = new AtomicInteger();
final AsyncCompleter completion =
new AsyncCompleter.Builder(
new Executor() {
public void execute(final Runnable command) {
count.getAndIncrement();
command.run();
}
})
.build();
final Iterable<Integer> queued = completion.invokeAll(ImmutableList.of(callable(1)));
assertEquals(1, queued.iterator().next().intValue());
assertEquals(1, queued.iterator().next().intValue());
assertEquals(1, queued.iterator().next().intValue());
assertEquals(1, count.get());
}
@Test
public void reverseOrder() {
final AsyncCompleter queue =
new AsyncCompleter.Builder(
new Executor() {
private final AtomicReference<Runnable> first = new AtomicReference<Runnable>();
public void execute(final Runnable command) {
if (first.get() == null) {
first.set(command);
return;
}
command.run();
first.get().run();
}
})
.build();
final Iterator<Integer> queued =
queue.invokeAll(ImmutableList.of(callable(1), callable(2))).iterator();
assertEquals(2, queued.next().intValue());
assertEquals(1, queued.next().intValue());
assertFalse(queued.hasNext());
}
@Test
public void invocationRegistersWithAccessor() throws Exception {
final AsyncCompleter completion = new AsyncCompleter.Builder(new CallerExecutor()).build();
final AtomicReference<Future<String>> ref = new AtomicReference<Future<String>>();
completion.invokeAllTasks(
ImmutableList.of(callable("blah!")),
new AsyncCompleter.Accessor<String>() {
@Override
public String apply(final CompletionService<String> input) {
try {
return input.poll().get();
} catch (final Exception e) {
throw new AssertionError(e);
}
}
@Override
public void register(final Future<String> f) {
assertTrue(ref.compareAndSet(null, f));
}
});
assertEquals("blah!", ref.get().get());
}