| /* |
| * 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.geode.cache.query; |
| |
| import java.util.Collection; |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.Future; |
| import java.util.concurrent.TimeUnit; |
| |
| |
| public class MultithreadedTester { |
| |
| |
| public static Collection<Object> runMultithreaded(Collection<Callable> callables) |
| throws InterruptedException { |
| final CountDownLatch allRunnablesAreSubmitted = new CountDownLatch(callables.size()); |
| final CountDownLatch callablesComplete = new CountDownLatch(callables.size()); |
| final ExecutorService executor = Executors.newFixedThreadPool(callables.size()); |
| final LinkedList<Future> futures = new LinkedList<>(); |
| // Submit all tasks to the executor |
| callables.forEach(callable -> { |
| futures.add(executor.submit(() -> { |
| try { |
| allRunnablesAreSubmitted.countDown(); |
| allRunnablesAreSubmitted.await(60, TimeUnit.SECONDS); |
| return callable.call(); |
| } catch (Throwable t) { |
| return t; |
| } finally { |
| callablesComplete.countDown(); |
| } |
| })); |
| }); |
| // Wait until all tasks are complete |
| callablesComplete.await(60, TimeUnit.SECONDS); |
| executor.shutdown(); |
| executor.awaitTermination(60, TimeUnit.SECONDS); |
| return convertFutureToResult(futures); |
| } |
| |
| private static Collection<Object> convertFutureToResult(final Collection<Future> futures) { |
| List<Object> results = new LinkedList<Object>(); |
| futures.forEach(future -> { |
| try { |
| results.add(future.get()); |
| } catch (Exception e) { |
| results.add(e); |
| } |
| }); |
| return results; |
| } |
| } |