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* JBoss, Home of Professional Open Source
* Copyright 2012, Red Hat, Inc., and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* Licensed 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.jboss.weld.tests.contexts.weld1159;
import java.net.SocketTimeoutException;
import java.net.URL;
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 org.jboss.arquillian.container.test.api.Deployment;
import org.jboss.arquillian.junit.Arquillian;
import org.jboss.arquillian.test.api.ArquillianResource;
import org.jboss.shrinkwrap.api.Archive;
import org.jboss.shrinkwrap.api.ShrinkWrap;
import org.jboss.shrinkwrap.api.asset.EmptyAsset;
import org.jboss.shrinkwrap.api.spec.WebArchive;
import org.jboss.weld.test.util.Utils;
import org.jboss.weld.tests.category.Integration;
import org.junit.After;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.runner.RunWith;
import com.gargoylesoftware.htmlunit.WebClient;
/**
*
* Reproduces deadlock between creation locks in the application and session context.
*
* Two pairs of beans are constructed in parallel:
*
* SessionScopedFoo -> ApplicationScopedFoo
* ApplicationScopedBar -> SessionScopedBar
*
* We use a {@link CountDownLatch} to simulate that both threads get into state when the first bean of the pair
* (SessionScopedFoo and ApplicationScopedFoo) is created and before the dependency is created. This causes deadlock
* because the first thread
*
* - owns the session lock
* - waits for application lock
*
* whereas the second thread
*
* - owns the application lock
* - waits for the session lock
*
* @author Jozef Hartinger
*
*/
@RunWith(Arquillian.class)
@Category(Integration.class)
public class ContextDeadlockTest {
@ArquillianResource
private volatile URL url;
private final WebClient client = new WebClient();
private final ExecutorService executor = Executors.newCachedThreadPool();
@Deployment(testable = false)
public static Archive<?> getDeployment() {
return ShrinkWrap.create(WebArchive.class, Utils.getDeploymentNameAsHash(ContextDeadlockTest.class, Utils.ARCHIVE_TYPE.WAR))
.addClasses(AbstractBean.class, ApplicationScopedFoo.class, ApplicationScopedBar.class, SessionScopedFoo.class, SessionScopedBar.class,
TestServlet.class)
.addAsWebInfResource(EmptyAsset.INSTANCE, "beans.xml");
}
@Test
public void test() throws Exception {
client.setTimeout(15000);
List<Callable<Void>> requests = new LinkedList<Callable<Void>>();
requests.add(new ConcurrentRequest(url.toString() + "/foo"));
requests.add(new ConcurrentRequest(url.toString() + "/bar"));
for (Future<Void> result : executor.invokeAll(requests)) {
result.get();
}
}
@After
public void shutdown() {
executor.shutdownNow();
}
private class ConcurrentRequest implements Callable<Void> {
private final String url;
public ConcurrentRequest(String url) {
this.url = url;
}
public Void call() throws Exception {
try {
client.getPage(url);
} catch (SocketTimeoutException e) {
throw new RuntimeException("The request for " + url + " timed out. It is very likely that a deadlock occured.");
}
return null;
}
}
}