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

Introduction

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

Prototype

public static <I, O> ListenableFuture<O> transform(ListenableFuture<I> input,
        Function<? super I, ? extends O> function, Executor executor)

Source Link

Document

Returns a new ListenableFuture whose result is the product of applying the given Function to the result of the given Future .

Usage

From source file:org.robotninjas.concurrent.FluentFutureTask.java

@Override
public <Y> FluentFuture<Y> transform(Executor executor, Function<V, Y> func) {
    return new FluentDecorator<>(Futures.transform(this, func, executor));
}

From source file:com.skcraft.plume.common.util.concurrent.DeferredImpl.java

@Override
public Deferred<Void> then(Callback<I> task, ListeningExecutorService executor) {
    return new DeferredImpl<>(Futures.transform(future, (AsyncFunction<I, Void>) input -> {
        task.handle(input);/* ww w.  j ava  2 s  . c  om*/
        return Futures.immediateFuture(null);
    }, executor), defaultExecutor);
}

From source file:org.robotninjas.concurrent.FluentDecorator.java

@Override
public <Y> FluentFuture<Y> transform(Executor executor, AsyncFunction<V, Y> func) {
    return new FluentDecorator<>(Futures.transform(this, func, executor), this.executor);
}

From source file:io.prestosql.split.SampledSplitSource.java

@Override
public ListenableFuture<SplitBatch> getNextBatch(ConnectorPartitionHandle partitionHandle, Lifespan lifespan,
        int maxSize) {
    ListenableFuture<SplitBatch> batch = splitSource.getNextBatch(partitionHandle, lifespan, maxSize);
    return Futures.transform(batch,
            splitBatch -> new SplitBatch(splitBatch.getSplits().stream()
                    .filter(input -> ThreadLocalRandom.current().nextDouble() < sampleRatio)
                    .collect(toImmutableList()), splitBatch.isLastBatch()),
            directExecutor());//from   ww w  . j a  v a2 s  . c  o  m
}

From source file:org.robotninjas.concurrent.FluentFutureTask.java

@Override
public <Y> FluentFuture<Y> transform(Executor executor, AsyncFunction<V, Y> func) {
    return new FluentDecorator<>(Futures.transform(this, func, executor));
}

From source file:com.noorq.casser.core.operation.AbstractOperation.java

public ListenableFuture<E> async() {

    ResultSetFuture resultSetFuture = sessionOps.executeAsync(options(buildStatement()), showValues);

    ListenableFuture<E> future = Futures.transform(resultSetFuture, new Function<ResultSet, E>() {

        @Override/*from w w w. j a va  2s.  co m*/
        public E apply(ResultSet resultSet) {
            return transform(resultSet);
        }

    }, sessionOps.getExecutor());

    return future;
}

From source file:io.prestosql.split.ConnectorAwareSplitSource.java

@Override
public ListenableFuture<SplitBatch> getNextBatch(ConnectorPartitionHandle partitionHandle, Lifespan lifespan,
        int maxSize) {
    ListenableFuture<ConnectorSplitBatch> nextBatch = toListenableFuture(
            source.getNextBatch(partitionHandle, maxSize));
    return Futures.transform(nextBatch, splitBatch -> {
        ImmutableList.Builder<Split> result = ImmutableList.builder();
        for (ConnectorSplit connectorSplit : splitBatch.getSplits()) {
            result.add(new Split(connectorId, transactionHandle, connectorSplit, lifespan));
        }//w ww .  j  a v  a 2s  .  co  m
        return new SplitBatch(result.build(), splitBatch.isNoMoreSplits());
    }, directExecutor());
}

From source file:com.facebook.buck.remoteexecution.grpc.GrpcAsyncBlobFetcher.java

@Override
public ListenableFuture<ByteBuffer> fetch(Protocol.Digest digest) {
    /** Payload received on a fetch request. */
    class Data {
        ByteString data = ByteString.EMPTY;

        public ByteBuffer get() {
            return data.asReadOnlyByteBuffer();
        }/*from w  ww .jav  a2s .c o  m*/

        public void concat(ByteString bytes) {
            data = data.concat(bytes);
        }
    }

    Data data = new Data();
    return closeScopeWhenFutureCompletes(CasBlobDownloadEvent.sendEvent(buckEventBus, 1, digest.getSize()),
            Futures.transform(GrpcRemoteExecutionClients.readByteStream(instanceName, digest, byteStreamStub,
                    data::concat), ignored -> data.get(), MoreExecutors.directExecutor()));
}

From source file:com.facebook.buck.distributed.LocalFsContentsProvider.java

@Override
public ListenableFuture<Boolean> materializeFileContentsAsync(BuildJobStateFileHashEntry entry,
        Path targetAbsPath) {/*from  w  w w.  j a  v  a2s .  c  o m*/
    RuleKey key = new RuleKey(entry.getSha1());
    return Futures.transform(dirCache.fetchAsync(null, key, LazyPath.ofInstance(targetAbsPath)),
            (CacheResult result) -> result.getType() == CacheResultType.HIT, MoreExecutors.directExecutor());
}

From source file:org.thingsboard.server.dao.attributes.BaseAttributesDao.java

@Override
public ListenableFuture<Optional<AttributeKvEntry>> find(EntityId entityId, String attributeType,
        String attributeKey) {//w  ww .  j a  v a  2  s  .co  m
    Select.Where select = select().from(ATTRIBUTES_KV_CF)
            .where(eq(ENTITY_TYPE_COLUMN, entityId.getEntityType())).and(eq(ENTITY_ID_COLUMN, entityId.getId()))
            .and(eq(ATTRIBUTE_TYPE_COLUMN, attributeType)).and(eq(ATTRIBUTE_KEY_COLUMN, attributeKey));
    log.trace("Generated query [{}] for entityId {} and key {}", select, entityId, attributeKey);
    return Futures.transform(executeAsyncRead(select),
            (Function<? super ResultSet, ? extends Optional<AttributeKvEntry>>) input -> Optional
                    .ofNullable(convertResultToAttributesKvEntry(attributeKey, input.one())),
            readResultsProcessingExecutor);
}