// Copyright 2014 The Bazel Authors. All rights reserved. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. package com.google.devtools.build.lib.concurrent; import com.google.common.util.concurrent.FutureCallback; import com.google.common.util.concurrent.Futures; import com.google.common.util.concurrent.ListenableFuture; import java.util.List; import javax.annotation.Nullable; /** * Utility class for working with futures. */ public class MoreFutures { private MoreFutures() {} /** * Creates a new {@code ListenableFuture} whose value is a list containing the * values of all its input futures, if all succeed. If any input fails, the * returned future fails. If any of the futures fails, it cancels all the other futures. * *
This method is similar to {@code Futures.allAsList} but additionally it cancels all the
* futures in case any of them fails.
*/
public static > allAsListOrCancelAll(
final Iterable extends ListenableFuture extends V>> futures) {
ListenableFuture
> combinedFuture = Futures.allAsList(futures);
Futures.addCallback(combinedFuture, new FutureCallback
>() {
@Override
public void onSuccess(@Nullable List