| /* |
| * 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.jackrabbit.oak.jcr; |
| |
| import static org.junit.Assert.fail; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.concurrent.TimeUnit; |
| |
| import javax.jcr.InvalidItemStateException; |
| import javax.jcr.Node; |
| import javax.jcr.RepositoryException; |
| import javax.jcr.Session; |
| |
| import org.apache.jackrabbit.oak.fixture.NodeStoreFixture; |
| import org.junit.Test; |
| |
| /** |
| * Concurrently adds and removes the same node. Either the operation must |
| * succeed or throw an InvalidItemStateException. |
| */ |
| public class ConcurrentAddRemoveIT extends AbstractRepositoryTest { |
| |
| private static final int NUM_WORKERS = 10; |
| |
| private static final long RUN_TIME = TimeUnit.SECONDS.toMillis(10); |
| |
| public ConcurrentAddRemoveIT(NodeStoreFixture fixture) { |
| super(fixture); |
| } |
| |
| @Test |
| public void concurrent() throws Exception { |
| List<Exception> exceptions = Collections.synchronizedList(new ArrayList<Exception>()); |
| Node test = getAdminSession().getRootNode().addNode("test"); |
| List<Thread> worker = new ArrayList<Thread>(); |
| for (int i = 0; i < NUM_WORKERS; i++) { |
| worker.add(new Thread(new Worker( |
| createAdminSession(), test.getPath(), exceptions))); |
| } |
| getAdminSession().save(); |
| for (Thread t : worker) { |
| t.start(); |
| } |
| for (Thread t : worker) { |
| t.join(); |
| } |
| for (Exception e : exceptions) { |
| fail(e.toString()); |
| } |
| } |
| |
| private static final class Worker implements Runnable { |
| |
| private final Session s; |
| private final String path; |
| private final List<Exception> exceptions; |
| |
| Worker(Session s, String path, List<Exception> exceptions) { |
| this.s = s; |
| this.path = path; |
| this.exceptions = exceptions; |
| } |
| |
| @Override |
| public void run() { |
| try { |
| long end = System.currentTimeMillis() + RUN_TIME; |
| while (end > System.currentTimeMillis()) { |
| s.refresh(false); |
| Node n = s.getNode(path); |
| if (n.hasNode("child")) { |
| n.getNode("child").remove(); |
| } else { |
| n.addNode("child"); |
| } |
| try { |
| s.save(); |
| } catch (InvalidItemStateException e) { |
| // refresh and retry |
| } |
| } |
| } catch (RepositoryException e) { |
| exceptions.add(e); |
| } finally { |
| s.logout(); |
| } |
| } |
| } |
| } |