| /* |
| * 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.felix.dm.itest.api; |
| |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| import org.junit.Assert; |
| |
| import org.apache.felix.dm.DependencyManager; |
| import org.apache.felix.dm.itest.util.TestBase; |
| |
| |
| /** |
| * Test for FELIX-4361 The DependencyManager.getComponents method failed in a concurrent situation on iterating the |
| * result of the method. |
| * |
| * @author <a href="mailto:dev@felix.apache.org">Felix Project Team</a> |
| */ |
| public class FELIX4361_ConcurrentComponentListingTest extends TestBase { |
| |
| @SuppressWarnings("rawtypes") |
| public void testConcurrentGetComponentsManipulation() { |
| DependencyManager dm = getDM(); |
| dm.add(dm.createComponent().setImplementation(Object.class)); |
| Iterator iterator = dm.getComponents().iterator(); |
| dm.add(dm.createComponent().setImplementation(Object.class)); |
| iterator.next(); |
| dm.clear(); |
| } |
| |
| public void testConcurrentGetComponentsMultipleThreads() { |
| final DependencyManager m = getDM(); |
| final AtomicInteger errors = new AtomicInteger(0); |
| final AtomicInteger componentsAdded = new AtomicInteger(0); |
| final int max = 10000; |
| final AtomicBoolean isRunning = new AtomicBoolean(true); |
| |
| ExecutorService executorService = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors() + 1); |
| Runnable readTask = new Runnable() { |
| @SuppressWarnings({ "rawtypes", "unused" }) |
| public void run() { |
| while (isRunning.get()) { |
| try { |
| List components = m.getComponents(); |
| for (Object component : components) { |
| // Just iterating the components should check for concurrent modifications |
| } |
| } |
| catch (Exception ex) { |
| errors.addAndGet(1); |
| ex.printStackTrace(); |
| } |
| } |
| } |
| }; |
| |
| Callable<Boolean> modifyTask = new Callable<Boolean>() { |
| public Boolean call() throws Exception { |
| try { |
| m.add(m.createComponent().setImplementation(Object.class)); |
| componentsAdded.addAndGet(1); |
| return true; |
| } |
| catch (Exception ex) { |
| return false; |
| } |
| } |
| }; |
| |
| executorService.submit(readTask); |
| for (int i = 0; i < max; i++) { |
| executorService.submit(modifyTask); |
| } |
| isRunning.set(false); |
| executorService.shutdown(); |
| |
| try { |
| executorService.awaitTermination(30, TimeUnit.SECONDS); |
| } |
| catch (InterruptedException e) { |
| } |
| Assert.assertEquals(0, errors.get()); |
| Assert.assertEquals(max, componentsAdded.get()); |
| m.clear(); |
| } |
| } |