| /* |
| * 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.test.concurrency.loop; |
| |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.Future; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| import org.apache.geode.test.concurrency.ParallelExecutor; |
| import org.apache.geode.test.concurrency.Runner; |
| |
| /** |
| * Simple runner that just runs the test in a loop |
| */ |
| public class LoopRunner implements Runner { |
| private static final int DEFAULT_COUNT = 2000; |
| |
| @Override |
| public List<Throwable> runTestMethod(Method child) { |
| int count = getCount(child); |
| |
| ExecutorService executorService = Executors.newCachedThreadPool(); |
| try { |
| ParallelExecutor executor = new DelegatingExecutor(executorService); |
| for (int i = 0; i < count; i++) { |
| try { |
| Object test = child.getDeclaringClass().newInstance(); |
| child.invoke(test, executor); |
| } catch (InvocationTargetException ex) { |
| Throwable exceptionToReturn = ex.getCause(); |
| if (exceptionToReturn == null) { |
| exceptionToReturn = ex; |
| } |
| return Collections.singletonList(ex.getCause()); |
| } catch (Exception e) { |
| return Collections.singletonList(e); |
| } |
| } |
| } finally { |
| executorService.shutdown(); |
| } |
| |
| return Collections.emptyList(); |
| } |
| |
| private int getCount(Method child) { |
| LoopRunnerConfig config = child.getDeclaringClass().getAnnotation(LoopRunnerConfig.class); |
| if (config == null) { |
| return DEFAULT_COUNT; |
| } |
| |
| return config.count(); |
| } |
| |
| private static class DelegatingExecutor implements ParallelExecutor { |
| private final ExecutorService executorService; |
| private List<Future<?>> futures; |
| private final AtomicInteger callablesStarting = new AtomicInteger(0); |
| private final CountDownLatch start = new CountDownLatch(1); |
| |
| public DelegatingExecutor(ExecutorService executorService) { |
| this.executorService = executorService; |
| futures = new ArrayList<>(); |
| } |
| |
| @Override |
| public <T> Future<T> inParallel(Callable<T> callable) { |
| callablesStarting.getAndIncrement(); |
| Future<T> future = executorService.submit(() -> { |
| callablesStarting.getAndDecrement(); |
| start.await(); |
| return callable.call(); |
| }); |
| futures.add(future); |
| return future; |
| } |
| |
| @Override |
| public void execute() throws ExecutionException, InterruptedException { |
| while (callablesStarting.get() > 0); |
| |
| start.countDown(); |
| for (Future future : futures) { |
| future.get(); |
| } |
| futures.clear(); |
| } |
| |
| } |
| } |