Example usage for com.google.common.util.concurrent Futures immediateFuture

Introduction

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

Prototype

@CheckReturnValue
public static <V> ListenableFuture<V> immediateFuture(@Nullable V value)

Source Link

Document

Creates a ListenableFuture which has its value set immediately upon construction.

Usage

From source file:producerstest.SimpleProducerModule.java

@Produces
@Qual(5)/* w  ww  .ja v a  2 s  .com*/
@SuppressWarnings("unused") // unthrown exception for test
static ListenableFuture<String> futureStrThrowingException() throws IOException {
    return Futures.immediateFuture("future str throwing exception");
}

From source file:io.crate.executor.SinglePageTaskResult.java

@Override
public ListenableFuture<PageableTaskResult> fetch(PageInfo pageInfo) {
    return Futures.immediateFuture(PageableTaskResult.EMPTY_PAGABLE_RESULT);
}

From source file:producerstest.multibindings.MultibindingProducerModule.java

@Produces
@IntoMap
@IntKey(42)
static ListenableFuture<String> futureFor42() {
    return Futures.immediateFuture("forty two");
}

From source file:itx.opendaylight.examples.cluster.demoakka.impl.ODLClusterSingleton.java

@Override
public ListenableFuture<Void> closeServiceInstance() {
    LOG.info("We lost Leadership");
    isLeader.set(false);
    return Futures.immediateFuture(null);
}

From source file:com.eviware.loadui.util.BeanInjector.java

@Nonnull
public static <T> ListenableFuture<T> getBeanFuture(@Nonnull final Class<T> cls) {
    Object cachedObject = INSTANCE.beanCache.getIfPresent(cls);
    if (cachedObject != null) {
        return Futures.immediateFuture(cls.cast(cachedObject));
    } else {//  www .ja  v a 2 s.  co  m
        return new BeanFuture<>(cls);
    }
}

From source file:com.facebook.buck.parser.PipelineNodeCache.java

/**
 * Helper for de-duping jobs against the cache.
 *
 * @param jobSupplier a supplier to use to create the actual job.
 * @return future describing the job. It can either be an immediate future (result cache hit),
 *         ongoing job (job cache hit) or a new job (miss).
 *//* w w  w.j a  va  2 s .com*/
protected final ListenableFuture<T> getJobWithCacheLookup(final Cell cell, final K key,
        JobSupplier<T> jobSupplier) throws BuildTargetException {
    Optional<T> cacheLookupResult = cache.lookupComputedNode(cell, key);
    if (cacheLookupResult.isPresent()) {
        return Futures.immediateFuture(cacheLookupResult.get());
    }

    ListenableFuture<T> speculativeCacheLookupResult = jobsCache.get(key);
    if (speculativeCacheLookupResult != null) {
        return speculativeCacheLookupResult;
    }

    // We use a SettableFuture to resolve any races between threads that are trying to create the
    // job for the given key. The SettableFuture is cheap to throw away in case we didn't "win" and
    // can be easily "connected" to a future that actually does work in case we did.
    SettableFuture<T> resultFutureCandidate = SettableFuture.create();
    ListenableFuture<T> resultFutureInCache = jobsCache.putIfAbsent(key, resultFutureCandidate);
    if (resultFutureInCache != null) {
        // Another thread succeeded in putting the new value into the cache.
        return resultFutureInCache;
    }
    // Ok, "our" candidate future went into the jobsCache, schedule the job and 'chain' the result
    // to the SettableFuture, so that anyone else waiting on it will get the same result.
    final SettableFuture<T> resultFuture = resultFutureCandidate;
    try {
        ListenableFuture<T> nodeJob = Futures.transformAsync(jobSupplier.get(),
                input -> Futures.immediateFuture(cache.putComputedNodeIfNotPresent(cell, key, input)));
        resultFuture.setFuture(nodeJob);
    } catch (Throwable t) {
        resultFuture.setException(t);
        throw t;
    }
    return resultFuture;
}

From source file:org.opendaylight.messenger.impl.MessengerService.java

@Override
public Future<RpcResult<GetLastMessageDatetimeOutput>> getLastMessageDatetime() {
    final String messDatetime = messProv.getlastMessageDatatime();
    if (messDatetime != null && !messDatetime.isEmpty()) {
        final GetLastMessageDatetimeOutput messOutput = new GetLastMessageDatetimeOutputBuilder()
                .setMessageDatetime(messDatetime).build();
        return Futures
                .immediateFuture(RpcResultBuilder.<GetLastMessageDatetimeOutput>success(messOutput).build());
    } else {/*from  w  w  w  .  ja va  2s .c  o  m*/
        return Futures.immediateFuture(RpcResultBuilder.<GetLastMessageDatetimeOutput>failed().build());
    }
}

From source file:io.v.impl.google.rpc.StreamImpl.java

@Override
public ListenableFuture<Object> recv(final Type type) {
    ListenableFutureCallback<byte[]> callback = new ListenableFutureCallback<>();
    nativeRecv(nativeRef, callback);/*from ww  w.  j a v a2 s .c o m*/
    return VFutures.withUserLandChecks(ctx,
            Futures.transform(callback.getVanillaFuture(), new AsyncFunction<byte[], Object>() {
                @Override
                public ListenableFuture<Object> apply(byte[] result) throws Exception {
                    return Futures.immediateFuture(VomUtil.decode(result, type));
                }
            }));
}

From source file:io.v.v23.syncbase.nosql.RowImpl.java

@Override
public ListenableFuture<Object> get(VContext ctx, final Type type) {
    return Futures.transform(client.get(ctx, schemaVersion), new AsyncFunction<byte[], Object>() {
        @Override/*from w  ww  .  j  a v a2s.c o  m*/
        public ListenableFuture<Object> apply(byte[] data) throws Exception {
            return Futures.immediateFuture(VomUtil.decode(data, type));
        }
    });
}

From source file:de.metas.ui.web.vaadin.window.view.WindowViewListener2EditorListenerWrapper.java

@Override
public ListenableFuture<Object> requestValue(final PropertyPath propertyPath) {
    final WindowViewListener windowViewListener = getWindowViewListener();
    if (windowViewListener == null) {
        return Futures.immediateFuture(null);
    }//from   w w w.  j a  va  2s.c  om
    return windowViewListener.viewRequestValue(propertyPath);
}