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*
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* Lesser General Public License for more details.
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* License along with this software; if not, write to the Free
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package org.jboss.as.test.integration.ejb.singleton.concurrency;
import static junit.framework.Assert.assertEquals;
import static junit.framework.Assert.assertTrue;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;
import java.util.logging.Logger;
import javax.ejb.ConcurrentAccessTimeoutException;
import javax.ejb.EJB;
import org.jboss.arquillian.container.test.api.Deployment;
import org.jboss.arquillian.junit.Arquillian;
import org.jboss.shrinkwrap.api.ShrinkWrap;
import org.jboss.shrinkwrap.api.spec.JavaArchive;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
/**
* Testcase for testing the basic functionality of a EJB3 singleton session bean.
*
* @author Jaikiran Pai
*/
@RunWith(Arquillian.class)
public class SingletonBeanTestCase {
private static final Logger log = Logger.getLogger(SingletonBeanTestCase.class.getName());
@Deployment
public static JavaArchive createDeployment() {
// create the ejb jar
final JavaArchive jar = ShrinkWrap.create(JavaArchive.class, "ejb3-singleton-bean-example.jar");
jar.addClass(ReadOnlySingletonBean.class);
jar.addClass(LongWritesSingletonBean.class);
jar.addClass(ReadOnlySingleton.class);
jar.addClass(SingletonBeanTestCase.class);
jar.addClass(ReadOnlySingletonBeanDescriptor.class);
jar.addAsManifestResource(SingletonBeanTestCase.class.getPackage(), "ejb-jar.xml", "ejb-jar.xml");
log.info(jar.toString(true));
return jar;
}
@EJB(mappedName = "java:global/ejb3-singleton-bean-example/ReadOnlySingletonBean!org.jboss.as.test.integration.ejb.singleton.concurrency.ReadOnlySingletonBean")
private ReadOnlySingletonBean readOnlySingletonBean;
@EJB(mappedName = "java:global/ejb3-singleton-bean-example/LongWritesSingletonBean!org.jboss.as.test.integration.ejb.singleton.concurrency.LongWritesSingletonBean")
private LongWritesSingletonBean longWritesSingletonBean;
@EJB(mappedName = "java:global/ejb3-singleton-bean-example/ReadOnlySingletonBeanDescriptor!org.jboss.as.test.integration.ejb.singleton.concurrency.ReadOnlySingletonBeanDescriptor")
private ReadOnlySingletonBeanDescriptor readOnlySingletonBeanDescriptor;
/**
* Tests that the concurrency on a singleton bean with lock type READ works as expected
*
* @throws Exception
*/
@Test
public void testReadOnlySingletonBean() throws Exception {
testReadOnlySingleton(readOnlySingletonBean);
}
@Test
public void testReadOnlySingletonDescriptor() throws Exception {
testReadOnlySingleton(readOnlySingletonBeanDescriptor);
}
public void testReadOnlySingleton(ReadOnlySingleton readOnlySingleton) throws Exception {
final int NUM_THREADS = 10;
ExecutorService executor = Executors.newFixedThreadPool(NUM_THREADS);
@SuppressWarnings("unchecked")
Future<String>[] results = new Future[NUM_THREADS];
for (int i = 0; i < NUM_THREADS; i++) {
results[i] = executor.submit(new ReadOnlySingletonBeanInvoker(readOnlySingleton, i));
}
for (int i = 0; i < NUM_THREADS; i++) {
String result = results[i].get(10, TimeUnit.SECONDS);
Assert.assertEquals("Unexpected value from singleton bean", String.valueOf(i), result);
}
}
/**
* Tests that invocation on a singleton bean method with write lock results in ConcurrentAccessTimeoutException
* for subsequent invocations, if the previous invocation(s) hasn't yet completed.
*
* @throws Exception
*/
@Test
public void testLongWritesSingleton() throws Exception {
// let's invoke a bean method (with WRITE lock semantics) which takes a long time to complete
final ExecutorService singleThreadExecutor = Executors.newSingleThreadExecutor();
// let's now try and invoke on this bean while the previous operation is in progress.
// we expect a ConcurrentAccessTimeoutException
final int NUM_THREADS = 10;
final ExecutorService nextTenInvocations = Executors.newFixedThreadPool(NUM_THREADS);
Future<?>[] results = new Future[NUM_THREADS];
// let the 10 threads invoke on the bean's method (which has WRITE lock semantics) which has a accesstimeout value
// set on it
for (int i = 0; i < NUM_THREADS; i++) {
results[i] = nextTenInvocations.submit(new LongWritesSingletonBeanInvoker(longWritesSingletonBean));
}
// Now fetch the results.
// all are expected to timeout
// one is expected to complete successfully
// rest all are expected to timeout
final List<Object> passed = new ArrayList<Object>();
final List<Throwable> throwables = new ArrayList<Throwable>();
for (int i = 0; i < NUM_THREADS; i++) {
try {
passed.add(results[i].get(10, TimeUnit.SECONDS));
} catch (ExecutionException ee) {
throwables.add(ee.getCause());
}
}
// only one call succeeded, so count should be 1
Assert.assertEquals("Unexpected count on singleton bean after invocation on method with WRITE lock semantic: ", 1, this.longWritesSingletonBean.getCount());
for (Throwable t : throwables) {
assertTrue(t.toString(), t instanceof ConcurrentAccessTimeoutException);
}
assertEquals(1, passed.size());
assertEquals(NUM_THREADS - 1, throwables.size());
}
private class ReadOnlySingletonBeanInvoker implements Callable<String> {
private ReadOnlySingleton bean;
private int num;
ReadOnlySingletonBeanInvoker(ReadOnlySingleton bean, int num) {
this.bean = bean;
this.num = num;
}
@Override
public String call() throws Exception {
log.info("Bean: " + bean.toString());
return bean.twoSecondEcho(String.valueOf(this.num));
}
}
private class LongWritesSingletonBeanInvoker implements Callable<Object> {
private LongWritesSingletonBean bean;
LongWritesSingletonBeanInvoker(LongWritesSingletonBean bean) {
this.bean = bean;
}
@Override
public Object call() throws Exception {
bean.fiveSecondWriteOperation();
return null;
}
}
}