Example usage for com.google.common.util.concurrent ListenableFuture isDone

Introduction

In this page you can find the example usage for com.google.common.util.concurrent ListenableFuture isDone.

Prototype

boolean isDone();

Source Link

Document

Returns true if this task completed.

Usage

From source file:com.spotify.trickle.GraphExceptionWrapper.java

private static Object inputValueFromFuture(ListenableFuture<?> input) {
    if (input.isDone()) {
        return Futures.getUnchecked(input);
    } else {//from w  w w . ja va2  s .co m
        return "NOT TERMINATED FUTURE";
    }
}

From source file:com.facebook.buck.util.MoreFutures.java

/**
 * Create a convenience method for checking whether a future completed successfully because this
 * does not appear to be possible to do in a more direct way:
 * https://groups.google.com/forum/?fromgroups=#!topic/guava-discuss/rofEhagKnOc.
 *
 * @return true if the specified future has been resolved without throwing an exception or being
 *     cancelled.//from  w  w w. j  a  v  a  2  s  . com
 */
public static <T> boolean isSuccess(ListenableFuture<T> future) {
    if (future.isDone()) {
        try {
            future.get();
            return true;
        } catch (ExecutionException e) {
            // The computation threw an exception, so it did not complete successfully.
            return false;
        } catch (CancellationException e) {
            // The computation was cancelled, so it did not complete successfully.
            return false;
        } catch (InterruptedException e) {
            throw new RuntimeException("Should not be possible to interrupt a resolved future.", e);
        }
    } else {
        return false;
    }
}

From source file:com.facebook.buck.util.concurrent.MoreFutures.java

/**
 * Create a convenience method for checking whether a future completed successfully because this
 * does not appear to be possible to do in a more direct way:
 * https://groups.google.com/forum/?fromgroups=#!topic/guava-discuss/rofEhagKnOc.
 *
 * @return true if the specified future has been resolved without throwing an exception or being
 *     cancelled.//from w  w w. j  a  v  a 2s.  c om
 */
public static boolean isSuccess(ListenableFuture<?> future) {
    if (!future.isDone()) {
        return false;
    }

    try {
        // Try to get the future, but ignore (and preserve) the thread interrupted state.
        // This should be fast because we know the future is already complete.
        Uninterruptibles.getUninterruptibly(future);
        return true;
    } catch (ExecutionException e) {
        // The computation threw an exception, so it did not complete successfully.
        return false;
    } catch (CancellationException e) {
        // The computation was cancelled, so it did not complete successfully.
        return false;
    }
}

From source file:io.v.v23.V23TestUtil.java

/**
 * Asserts that the given future is executed on the provided thread.
 * <p>//w  w w  .j a  va  2s.  c om
 * Note that this check is inherently racey: if the future has already completed, there is
 * no way to check on which thread it got executed.  Therefore, this method should be executed
 * as close possible to the future's creation, to reduce the chance of the race happening.
 * Additionally, the future could be created with an executor that delays execution for a time
 * period that sufficient to all but prohibit races (e.g., 100ms).
 */
public static <T> void assertRunsOnThread(ListenableFuture<T> future, final Thread thread) {
    try {
        assertThat(future.isDone()).isFalse();
        Futures.transform(future, new AsyncFunction<T, Void>() {
            @Override
            public ListenableFuture<Void> apply(T input) throws Exception {
                assertThat(Thread.currentThread()).isEqualTo(thread);
                return Futures.immediateFuture(null);
            }
        }).get();
    } catch (Exception e) {
        Truth.assertWithMessage("error asserting executor").that(e.getMessage()).isEmpty();
    }
}

From source file:com.facebook.buck.util.concurrent.MoreFutures.java

/**
 * Returns the failure for a {@link ListenableFuture}.
 * @param future Must have completed unsuccessfully.
 *//*from   w  ww. j a v  a 2  s . co  m*/
public static Throwable getFailure(ListenableFuture<?> future) {
    Preconditions.checkArgument(future.isDone());
    Preconditions.checkArgument(!isSuccess(future));
    try {
        future.get();
        throw new IllegalStateException("get() should have thrown an exception");
    } catch (ExecutionException e) {
        return e.getCause();
    } catch (CancellationException | InterruptedException e) {
        throw new IllegalStateException(e);
    }
}

From source file:org.opendaylight.vtn.manager.internal.util.concurrent.FutureCanceller.java

/**
 * Set a future canceller that cancels the given future.
 *
 * @param timer    A {@link Timer} instance to execute the timer.
 * @param timeout  The number of milliseconds to wait for completion of
 *                 the target task.//from   w  w w.  j  a  v  a  2 s. c o m
 * @param f        A {@link ListenableFuture} instance associated with the
 *                 task to wait.
 * @param intr     {@code true} if the task runner thread should be
 *                 interrupted. Otherwise in-progress task are allowed
 *                 to complete.
 * @param <T>      The type of the result returned by the target task.
 */
public static <T> void set(Timer timer, long timeout, ListenableFuture<T> f, boolean intr) {
    if (!f.isDone()) {
        FutureCanceller<T> canceller = new FutureCanceller<T>(f, intr);
        timer.schedule(canceller, timeout);
        Futures.addCallback(f, canceller);
    }
}

From source file:dagger.functional.producers.cancellation.CancellationModule.java

@Produces
@Named("ep3")// www. java 2 s . com
static ListenableFuture<String> produceEntryPoint3(Producer<String> dependencyProducer) {
    ListenableFuture<String> dependencyFuture = dependencyProducer.get();
    assertThat(dependencyFuture.isDone()).isFalse();
    assertThat(dependencyFuture.cancel(true)).isTrue();
    assertThat(dependencyFuture.isCancelled()).isTrue();
    return dependencyFuture;
}

From source file:io.prestosql.execution.buffer.BufferTestUtils.java

static ListenableFuture<?> enqueuePage(OutputBuffer buffer, Page page) {
    buffer.enqueue(ImmutableList.of(PAGES_SERDE.serialize(page)));
    ListenableFuture<?> future = buffer.isFull();
    assertFalse(future.isDone());
    return future;
}

From source file:io.prestosql.execution.buffer.BufferTestUtils.java

static ListenableFuture<?> enqueuePage(OutputBuffer buffer, Page page, int partition) {
    buffer.enqueue(partition, ImmutableList.of(PAGES_SERDE.serialize(page)));
    ListenableFuture<?> future = buffer.isFull();
    assertFalse(future.isDone());
    return future;
}

From source file:com.facebook.buck.distributed.build_client.RacingBuildPhase.java

/**
 * Races local build against distributed build, returning when either: - Local racing build
 * finishes before distributed build - 'Most build rules finished' event received - Distributed
 * build failed. -- If local fallback mode is enabled, waits for racing build to finish before
 * returning.//  w w  w  .j  av a2s  .com
 *
 * @return True if all work completed during this phase and further phases not necessary
 * @throws InterruptedException
 */
public static boolean run(DistBuildRunner distBuildRunner, LocalBuildRunner racingBuildRunner,
        RemoteBuildRuleCompletionWaiter remoteBuildRuleCompletionWaiter, boolean localBuildFallbackEnabled,
        BuckEventBus eventBus) throws InterruptedException {
    LOG.info("Starting racing build phase.");
    eventBus.post(new StampedeLocalBuildStatusEvent("racing"));

    racingBuildRunner.runLocalBuildAsync();
    attachMostBuildRulesCompletedCallback(racingBuildRunner, remoteBuildRuleCompletionWaiter);

    LOG.info("Waiting for racing build to finish, or most build rules event to be received..");
    racingBuildRunner.getBuildPhaseLatch().await();

    boolean mostBuildRulesFinishedInFailure = false;
    ListenableFuture<Boolean> mostBuildRulesFinished = remoteBuildRuleCompletionWaiter
            .waitForMostBuildRulesToFinishRemotely();
    if (mostBuildRulesFinished.isDone()) {
        try {
            mostBuildRulesFinishedInFailure = !mostBuildRulesFinished.get();
        } catch (ExecutionException e) {
            mostBuildRulesFinishedInFailure = true;
        }
    }

    if (racingBuildRunner.isFinished()) {
        LOG.info("Local racing build finished before distributed build.");
        distBuildRunner.cancelAsLocalBuildFinished(racingBuildRunner.finishedSuccessfully(),
                racingBuildRunner.getExitCode());
        return true; // Build is done. Nothing more to do
    } else if (distBuildRunner.finishedSuccessfully()) {
        // Distributed build finished without a 'most build rules finished' event.
        // Technically this shouldn't happen, but handle it gracefully anyway.
        String message = "Distributed build finished before local racing build. Moving to synchronized build phase.";
        LOG.warn(message);
        racingBuildRunner.cancelAndWait(message);
        return false;
    } else if (distBuildRunner.failed() || mostBuildRulesFinishedInFailure) {
        LOG.info("Distributed build failed before local racing build.");
        if (localBuildFallbackEnabled) {
            // Wait for local build to finish, no need to execute sync build.
            // TODO(alisdair, shivanker): It _might_ be better to switch to synchronized build here.
            // The trade-off is that synchronized build would waste time in restarting the build
            // (computing rule-keys, parsing the tree - to get local key unchanged hits, etc.) but
            // it could probably get cache hits on some top-level artifacts, which would save time
            // against the racing build which is going to download all lower level artifacts in case it
            // already expanded that top-level node.
            eventBus.post(new StampedeLocalBuildStatusEvent("fallback", "Local Build"));
            LOG.info("Falling back to local racing build. Waiting for it to finish..");
            racingBuildRunner.waitUntilFinished();
        } else {
            // Kill local build, no need to execute sync build.
            LOG.info("Killing local racing build as local fallback not enabled.");
            racingBuildRunner.cancelAndWait("Distributed build failed, and local fallback not enabled.");
        }

        return true;
    } else if (mostBuildRulesFinished.isDone()) {
        // Important: this is the most generic case (as finishing a dist build will unlock this future
        // too), so ensure that it comes last in the if/else clauses.
        String message = "Most build rules finished remotely before local racing build. Moving to synchronized build phase.";
        LOG.info(message);
        racingBuildRunner.cancelAndWait(message);
        return false;
    }

    LOG.error("Unsupported code path hit in racing build phase. Assuming it failed.");
    return false;
}