org.apache.hudi.common.util.FutureUtils Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.hudi.common.util;
import javax.annotation.Nonnull;
import java.util.List;
import java.util.concurrent.CompletableFuture;
import java.util.stream.Collectors;
/**
* A utility class for future operation.
*/
public class FutureUtils {
/**
* Parallel CompletableFutures
*
* @param futures CompletableFuture list
* @return a new CompletableFuture which will completed when all of the given CompletableFutures complete.
*/
public static CompletableFuture> allOf(@Nonnull List> futures) {
return CompletableFuture.allOf(futures.toArray(new CompletableFuture[0]))
.thenApply(aVoid ->
futures.stream()
// NOTE: This join wouldn't block, since all the
// futures are completed at this point.
.map(CompletableFuture::join)
.collect(Collectors.toList()));
}
}