| /* |
| * Copyright (c) 2012, 2013, 2015, 2016, 2018, 2019 Eike Stepper (Loehne, Germany) and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Eike Stepper - initial API and implementation |
| */ |
| package org.eclipse.emf.cdo.tests.bugzilla; |
| |
| import org.eclipse.emf.cdo.eresource.CDOResource; |
| import org.eclipse.emf.cdo.session.CDOSession; |
| import org.eclipse.emf.cdo.tests.AbstractCDOTest; |
| import org.eclipse.emf.cdo.tests.model1.Category; |
| import org.eclipse.emf.cdo.transaction.CDOTransaction; |
| import org.eclipse.emf.cdo.util.CommitConflictException; |
| |
| import org.eclipse.net4j.util.concurrent.ConcurrencyUtil; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.CountDownLatch; |
| |
| /** |
| * Bug 390185: Deadlock on multiple concurrent transactions. |
| * |
| * @author Eike Stepper |
| */ |
| public class Bugzilla_390185_Test extends AbstractCDOTest |
| { |
| private static final int THREADS = 4; |
| |
| private static final int TRANSACTIONS_PER_THREAD = 40; |
| |
| public void testInvalidationDeadlock() throws Exception |
| { |
| CDOSession session = openSession(); |
| |
| CountDownLatch latch = new CountDownLatch(THREADS); |
| List<Actor> actors = new ArrayList<>(THREADS); |
| for (int i = 0; i < THREADS; i++) |
| { |
| Actor actor = new Actor(session, latch, i); |
| actors.add(actor); |
| } |
| |
| await(latch); |
| } |
| |
| /** |
| * @author Eike Stepper |
| */ |
| private class Actor extends Thread |
| { |
| private CDOSession session; |
| |
| private CountDownLatch latch; |
| |
| private int nr; |
| |
| public Actor(CDOSession session, CountDownLatch latch, int nr) |
| { |
| super("Actor-" + nr); |
| this.session = session; |
| this.latch = latch; |
| this.nr = nr; |
| start(); |
| } |
| |
| @Override |
| public void run() |
| { |
| for (int i = 0; i < TRANSACTIONS_PER_THREAD; i++) |
| { |
| CDOTransaction transaction = session.openTransaction(); |
| attemptCommit(transaction); |
| transaction.close(); |
| ConcurrencyUtil.sleep(2); |
| } |
| |
| latch.countDown(); |
| } |
| |
| private void attemptCommit(final CDOTransaction transaction) |
| { |
| for (;;) |
| { |
| final Category category = getModel1Factory().createCategory(); |
| category.setName("category-" + System.currentTimeMillis()); |
| |
| try |
| { |
| transaction.syncExec(new Callable<Object>() |
| { |
| @Override |
| public Object call() throws Exception |
| { |
| CDOResource res = transaction.getOrCreateResource(getResourcePath("/res-" + nr)); |
| res.getContents().add(category); |
| transaction.commit(); |
| |
| return null; |
| } |
| }); |
| |
| break; |
| } |
| catch (CommitConflictException ex) |
| { |
| transaction.rollback(); |
| } |
| catch (Exception ex) |
| { |
| ex.printStackTrace(); |
| break; |
| } |
| } |
| |
| transaction.close(); |
| } |
| } |
| } |