| /** |
| * 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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.distributedlog.protocol.util; |
| |
| import com.google.common.collect.Lists; |
| import com.twitter.util.Future; |
| import com.twitter.util.Promise; |
| import com.twitter.util.Return; |
| import java.util.List; |
| import java.util.concurrent.CompletableFuture; |
| import java.util.concurrent.CompletionException; |
| import org.apache.distributedlog.common.concurrent.FutureUtils; |
| |
| /** |
| * Utils for Twitter's {@link com.twitter.util.Future}. |
| */ |
| public final class TwitterFutureUtils { |
| |
| private TwitterFutureUtils() {} |
| |
| public static <T> CompletableFuture<T> newJFuture(Promise<T> promise) { |
| CompletableFuture<T> jFuture = FutureUtils.createFuture(); |
| jFuture.whenComplete((value, cause) -> { |
| if (null != cause) { |
| if (cause instanceof CompletionException) { |
| promise.setException(cause.getCause()); |
| } else { |
| promise.setException(cause); |
| } |
| } else { |
| promise.setValue(value); |
| } |
| }); |
| return jFuture; |
| } |
| |
| public static <T> Future<T> newTFuture(CompletableFuture<T> jFuture) { |
| Promise<T> promise = new Promise<>(); |
| jFuture.whenComplete((value, cause) -> { |
| if (null != cause) { |
| if (cause instanceof CompletionException) { |
| promise.setException(cause.getCause()); |
| } else { |
| promise.setException(cause); |
| } |
| } else { |
| promise.setValue(value); |
| } |
| }); |
| return promise; |
| } |
| |
| public static <T> Future<List<Future<T>>> newTFutureList( |
| CompletableFuture<List<CompletableFuture<T>>> jFutureList) { |
| Promise<List<Future<T>>> promise = new Promise<>(); |
| jFutureList.whenComplete((value, cause) -> { |
| if (null != cause) { |
| if (cause instanceof CompletionException) { |
| promise.setException(cause.getCause()); |
| } else { |
| promise.setException(cause); |
| } |
| } else { |
| promise.setValue(Lists.transform( |
| value, |
| future -> newTFuture(future))); |
| } |
| }); |
| return promise; |
| } |
| |
| public static <T> void setValue(Promise<T> promise, T value) { |
| promise.updateIfEmpty(new Return<T>(value)); |
| } |
| |
| } |