/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2011, Red Hat Inc. or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.hibernate.ejb.test.lock;
import javax.persistence.EntityManager;
import javax.persistence.LockModeType;
import javax.persistence.LockTimeoutException;
import javax.persistence.OptimisticLockException;
import javax.persistence.Query;
import javax.persistence.QueryTimeoutException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.Callable;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.FutureTask;
import java.util.concurrent.TimeUnit;
import org.jboss.logging.Logger;
import org.hibernate.dialect.HSQLDialect;
import org.hibernate.dialect.Oracle10gDialect;
import org.hibernate.ejb.AvailableSettings;
import org.hibernate.ejb.test.BaseEntityManagerFunctionalTestCase;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
/**
* @author Emmanuel Bernard
*/
public class LockTest extends BaseEntityManagerFunctionalTestCase {
private static final Logger log = Logger.getLogger( LockTest.class );
@Test
public void testFindWithTimeoutHint() {
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
Lock lock = new Lock();
lock.setName( "name" );
em.persist( lock );
em.getTransaction().commit();
em.close();
em = getOrCreateEntityManager();
em.getTransaction().begin();
Map<String, Object> properties = new HashMap<String, Object>();
properties.put( AvailableSettings.LOCK_TIMEOUT, 0L );
em.find( Lock.class, 1, LockModeType.PESSIMISTIC_WRITE, properties );
em.getTransaction().commit();
em.close();
em = getOrCreateEntityManager();
em.getTransaction().begin();
lock = em.find( Lock.class, lock.getId() );
em.remove( lock );
em.getTransaction().commit();
em.close();
}
@Test
public void testLockRead() throws Exception {
Lock lock = new Lock();
lock.setName( "name" );
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
em.persist( lock );
em.getTransaction().commit();
em.getTransaction().begin();
lock = em.getReference( Lock.class, lock.getId() );
em.lock( lock, LockModeType.READ );
lock.setName( "surname" );
em.getTransaction().commit();
em.getTransaction().begin();
lock = em.find( Lock.class, lock.getId() );
assertEquals( "surname", lock.getName() );
em.remove( lock );
em.getTransaction().commit();
em.close();
}
@Test
public void testLockOptimistic() throws Exception {
Lock lock = new Lock();
lock.setName( "name" );
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
em.persist( lock );
em.getTransaction().commit();
em.getTransaction().begin();
lock = em.getReference( Lock.class, lock.getId() );
em.lock( lock, LockModeType.OPTIMISTIC );
lock.setName( "surname" );
em.getTransaction().commit();
em.getTransaction().begin();
lock = em.find( Lock.class, lock.getId() );
assertEquals( "surname", lock.getName() );
em.remove( lock );
em.getTransaction().commit();
em.close();
}
@Test
public void testLockWrite() throws Exception {
Lock lock = new Lock();
lock.setName( "second" );
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
em.persist( lock );
em.getTransaction().commit();
em.getTransaction().begin();
lock = em.getReference( Lock.class, lock.getId() );
Integer version = lock.getVersion();
em.lock( lock, LockModeType.WRITE );
em.getTransaction().commit();
em.getTransaction().begin();
lock = em.getReference( Lock.class, lock.getId() );
try {
assertEquals( "should increase the version number EJB-106", 1, lock.getVersion() - version );
}
finally {
em.remove( lock );
em.getTransaction().commit();
}
em.close();
}
@Test
public void testLockWriteOnUnversioned() throws Exception {
UnversionedLock lock = new UnversionedLock();
lock.setName( "second" );
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
em.persist( lock );
em.getTransaction().commit();
em.getTransaction().begin();
lock = em.getReference( UnversionedLock.class, lock.getId() );
try {
// getting a READ (optimistic) lock on unversioned entity is not expected to work.
// To get the same functionality as prior release, change the LockModeType.READ lock to:
// em.lock(lock,LockModeType.PESSIMISTIC_READ);
em.lock( lock, LockModeType.READ );
fail("expected OptimisticLockException exception");
} catch(OptimisticLockException expected) {}
em.getTransaction().rollback();
// the previous code block can be rewritten as follows (to get the previous behavior)
em.getTransaction().begin();
lock = em.getReference( UnversionedLock.class, lock.getId() );
em.lock( lock, LockModeType.PESSIMISTIC_READ );
em.getTransaction().commit();
em.getTransaction().begin();
lock = em.getReference( UnversionedLock.class, lock.getId() );
em.remove( lock );
em.getTransaction().commit();
em.close();
}
@Test
public void testLockPessimisticForceIncrement() throws Exception {
Lock lock = new Lock();
lock.setName( "force" );
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
em.persist( lock );
em.getTransaction().commit();
em.getTransaction().begin();
lock = em.getReference( Lock.class, lock.getId() );
Integer version = lock.getVersion();
em.lock( lock, LockModeType.PESSIMISTIC_FORCE_INCREMENT );
em.getTransaction().commit();
em.getTransaction().begin();
lock = em.getReference( Lock.class, lock.getId() );
try {
assertEquals( "should increase the version number ", 1, lock.getVersion() - version );
}
finally {
em.remove( lock );
em.getTransaction().commit();
}
em.close();
}
@Test
public void testLockOptimisticForceIncrement() throws Exception {
Lock lock = new Lock();
lock.setName( "force" );
EntityManager em = getOrCreateEntityManager();
em.getTransaction().begin();
em.persist( lock );
em.getTransaction().commit();
em.getTransaction().begin();
lock = em.getReference( Lock.class, lock.getId() );
Integer version = lock.getVersion();
em.lock( lock, LockModeType.OPTIMISTIC_FORCE_INCREMENT );
em.getTransaction().commit();
em.getTransaction().begin();
lock = em.getReference( Lock.class, lock.getId() );
try {
assertEquals( "should increase the version number ", 1, lock.getVersion() - version );
}
finally {
em.remove( lock );
em.getTransaction().commit();
}
em.close();
}
@Test
public void testLockOptimisticForceIncrementDifferentEm() throws Exception {
Lock lock = new Lock();
lock.setName( "force" );
EntityManager em1 = createIsolatedEntityManager();
em1.getTransaction().begin();
em1.persist( lock );
em1.getTransaction().commit();
em1.close();
EntityManager em2 = createIsolatedEntityManager();
em2.getTransaction().begin();
lock = em2.find( Lock.class, lock.getId(), LockModeType.OPTIMISTIC );
assertEquals( "lock mode should be OPTIMISTIC ", LockModeType.OPTIMISTIC, em2.getLockMode(lock) );
em2.lock( lock, LockModeType.OPTIMISTIC_FORCE_INCREMENT );
assertEquals( "lock mode should be OPTIMISTIC_FORCE_INCREMENT ", LockModeType.OPTIMISTIC_FORCE_INCREMENT, em2.getLockMode(lock) );
em2.getTransaction().commit();
em2.getTransaction().begin();
em2.remove( lock );
em2.getTransaction().commit();
em2.close();
}
@Test
public void testContendedPessimisticLock() throws Exception {
EntityManager em = getOrCreateEntityManager();
final EntityManager em2 = createIsolatedEntityManager();
// TODO: replace dialect instanceof test with a Dialect.hasCapability (e.g. supportsPessimisticWriteLock)
if ( getDialect() instanceof HSQLDialect) {
log.info("skipping testContendedPessimisticLock");
return;
}
Lock lock = new Lock();
Thread t = null;
try {
lock.setName( "testContendedPessimisticLock" );
em.getTransaction().begin();
em.persist( lock );
em.getTransaction().commit();
em.clear();
em.getTransaction().begin();
lock = em.getReference( Lock.class, lock.getId() );
em.lock( lock, LockModeType.PESSIMISTIC_WRITE );
final Integer id = lock.getId();
lock.getName(); // force entity to be read
log.info("testContendedPessimisticLock: got write lock");
final CountDownLatch latch = new CountDownLatch(1);
t = new Thread( new Runnable() {
public void run() {
try {
em2.getTransaction().begin();
log.info("testContendedPessimisticLock: (BG) about to issue (PESSIMISTIC_READ) query against write-locked entity");
// we should block on the following read
Query query = em2.createQuery(
"select L from Lock_ L where L.id < 10000 ");
query.setLockMode(LockModeType.PESSIMISTIC_READ);
List<Lock> resultList = query.getResultList();
resultList.get(0).getName(); // force entity to be read
}
finally {
em2.getTransaction().commit();
latch.countDown(); // signal that we got the read lock
}
}
} );
t.setDaemon( true );
t.setName("LockTest read lock");
t.start();
log.info("testContendedPessimisticLock: wait on BG thread");
boolean latchSet = latch.await( 10, TimeUnit.SECONDS );
// latchSet should be false (timeout) because the background thread
// shouldn't be able to get a read lock on write locked entity.
log.info("testContendedPessimisticLock: BG thread completed transaction");
assertFalse( "shouldn't be able to get read lock while another transaction has write lock",latchSet );
em.getTransaction().commit();
}
finally {
if ( em.getTransaction().isActive() ) {
em.getTransaction().rollback();
}
if ( t != null) { // wait for background thread to finish before deleting entity
t.join();
}
em.getTransaction().begin();
lock = em.getReference( Lock.class, lock.getId() );
em.remove( lock );
em.getTransaction().commit();
em.close();
em2.close();
}
}
@Test
public void testContendedPessimisticReadLockTimeout() throws Exception {
EntityManager em = getOrCreateEntityManager();
final EntityManager em2 = createIsolatedEntityManager();
// TODO: replace dialect instanceof test with a Dialect.hasCapability (e.g. supportsPessimisticLockTimeout)
if ( ! (getDialect() instanceof Oracle10gDialect)) {
log.info("skipping testContendedPessimisticReadLockTimeout");
return;
}
Lock lock = new Lock();
Thread t = null;
FutureTask<Boolean> bgTask = null;
final CountDownLatch latch = new CountDownLatch(1);
try {
lock.setName( "testContendedPessimisticReadLockTimeout" );
em.getTransaction().begin();
em.persist( lock );
em.getTransaction().commit();
em.clear();
em.getTransaction().begin();
lock = em.getReference( Lock.class, lock.getId() );
em.lock( lock, LockModeType.PESSIMISTIC_WRITE );
final Integer id = lock.getId();
lock.getName(); // force entity to be read
log.info("testContendedPessimisticReadLockTimeout: got write lock");
bgTask = new FutureTask<Boolean>( new Callable() {
public Boolean call() {
try {
boolean timedOut = false; // true (success) if LockTimeoutException occurred
em2.getTransaction().begin();
log.info("testContendedPessimisticReadLockTimeout: (BG) about to read write-locked entity");
// we should block on the following read
Lock lock2 = em2.getReference( Lock.class, id );
lock2.getName(); // force entity to be read
log.info("testContendedPessimisticReadLockTimeout: (BG) read write-locked entity");
Map<String,Object> props = new HashMap<String, Object>();
// timeout is in milliseconds
props.put("javax.persistence.lock.timeout", new Integer(1000));
try {
em2.lock( lock2, LockModeType.PESSIMISTIC_READ, props);
}
catch( LockTimeoutException e) {
// success
log.info("testContendedPessimisticReadLockTimeout: (BG) got expected timeout exception");
timedOut = true;
}
catch ( Throwable e) {
log.info("Expected LockTimeoutException but got unexpected exception", e);
}
em2.getTransaction().commit();
return new Boolean(timedOut);
}
finally {
latch.countDown(); // signal that we finished
}
}
} );
t = new Thread(bgTask);
t.setDaemon( true );
t.setName("Lock timeout Test (bg)");
t.start();
boolean latchSet = latch.await( 10, TimeUnit.SECONDS ); // should return quickly on success
assertTrue( "background test thread finished (lock timeout is broken)", latchSet);
assertTrue( "background test thread timed out on lock attempt", bgTask.get().booleanValue() );
em.getTransaction().commit();
}
finally {
if ( em.getTransaction().isActive() ) {
em.getTransaction().rollback();
}
if ( t != null) { // wait for background thread to finish before deleting entity
t.join();
}
em.getTransaction().begin();
lock = em.getReference( Lock.class, lock.getId() );
em.remove( lock );
em.getTransaction().commit();
em.close();
em2.close();
}
}
@Test
public void testContendedPessimisticWriteLockTimeout() throws Exception {
EntityManager em = getOrCreateEntityManager();
final EntityManager em2 = createIsolatedEntityManager();
// TODO: replace dialect instanceof test with a Dialect.hasCapability (e.g. supportsPessimisticLockTimeout)
if ( ! (getDialect() instanceof Oracle10gDialect)) {
log.info("skipping testContendedPessimisticWriteLockTimeout");
return;
}
Lock lock = new Lock();
Thread t = null;
FutureTask<Boolean> bgTask = null;
final CountDownLatch latch = new CountDownLatch(1);
try {
lock.setName( "testContendedPessimisticWriteLockTimeout" );
em.getTransaction().begin();
em.persist( lock );
em.getTransaction().commit();
em.clear();
em.getTransaction().begin();
lock = em.getReference( Lock.class, lock.getId() );
em.lock( lock, LockModeType.PESSIMISTIC_WRITE );
final Integer id = lock.getId();
lock.getName(); // force entity to be read
log.info("testContendedPessimisticWriteLockTimeout: got write lock");
bgTask = new FutureTask<Boolean>( new Callable() {
public Boolean call() {
try {
boolean timedOut = false; // true (success) if LockTimeoutException occurred
em2.getTransaction().begin();
log.info("testContendedPessimisticWriteLockTimeout: (BG) about to read write-locked entity");
// we should block on the following read
Lock lock2 = em2.getReference( Lock.class, id );
lock2.getName(); // force entity to be read
log.info("testContendedPessimisticWriteLockTimeout: (BG) read write-locked entity");
Map<String,Object> props = new HashMap<String, Object>();
// timeout is in milliseconds
props.put("javax.persistence.lock.timeout", new Integer(1000));
try {
em2.lock( lock2, LockModeType.PESSIMISTIC_WRITE, props);
}
catch( LockTimeoutException e) {
// success
log.info("testContendedPessimisticWriteLockTimeout: (BG) got expected timeout exception");
timedOut = true;
}
catch ( Throwable e) {
log.info("Expected LockTimeoutException but got unexpected exception", e);
}
em2.getTransaction().commit();
return new Boolean(timedOut);
}
finally {
latch.countDown(); // signal that we finished
}
}
} );
t = new Thread(bgTask);
t.setDaemon( true );
t.setName("Lock timeout Test (bg)");
t.start();
boolean latchSet = latch.await( 10, TimeUnit.SECONDS ); // should return quickly on success
assertTrue( "background test thread finished (lock timeout is broken)", latchSet);
assertTrue( "background test thread timed out on lock attempt", bgTask.get().booleanValue() );
em.getTransaction().commit();
}
finally {
if ( em.getTransaction().isActive() ) {
em.getTransaction().rollback();
}
if ( t != null) { // wait for background thread to finish before deleting entity
t.join();
}
em.getTransaction().begin();
lock = em.getReference( Lock.class, lock.getId() );
em.remove( lock );
em.getTransaction().commit();
em.close();
em2.close();
}
}
@Test
public void testContendedPessimisticWriteLockNoWait() throws Exception {
EntityManager em = getOrCreateEntityManager();
final EntityManager em2 = createIsolatedEntityManager();
// TODO: replace dialect instanceof test with a Dialect.hasCapability (e.g. supportsPessimisticLockTimeout)
if ( ! (getDialect() instanceof Oracle10gDialect)) {
log.info("skipping testContendedPessimisticWriteLockNoWait");
return;
}
Lock lock = new Lock();
Thread t = null;
FutureTask<Boolean> bgTask = null;
final CountDownLatch latch = new CountDownLatch(1);
try {
lock.setName( "testContendedPessimisticWriteLockNoWait" );
em.getTransaction().begin();
em.persist( lock );
em.getTransaction().commit();
em.clear();
em.getTransaction().begin();
lock = em.getReference( Lock.class, lock.getId() );
em.lock( lock, LockModeType.PESSIMISTIC_WRITE );
final Integer id = lock.getId();
lock.getName(); // force entity to be read
log.info("testContendedPessimisticWriteLockNoWait: got write lock");
bgTask = new FutureTask<Boolean>( new Callable() {
public Boolean call() {
try {
boolean timedOut = false; // true (success) if LockTimeoutException occurred
em2.getTransaction().begin();
log.info("testContendedPessimisticWriteLockNoWait: (BG) about to read write-locked entity");
// we should block on the following read
Lock lock2 = em2.getReference( Lock.class, id );
lock2.getName(); // force entity to be read
log.info("testContendedPessimisticWriteLockNoWait: (BG) read write-locked entity");
Map<String,Object> props = new HashMap<String, Object>();
// timeout of zero means no wait (for lock)
props.put("javax.persistence.lock.timeout", new Integer(0));
try {
em2.lock( lock2, LockModeType.PESSIMISTIC_WRITE, props);
}
catch( LockTimeoutException e) {
// success
log.info("testContendedPessimisticWriteLockNoWait: (BG) got expected timeout exception");
timedOut = true;
}
catch ( Throwable e) {
log.info("Expected LockTimeoutException but got unexpected exception", e);
}
em2.getTransaction().commit();
return new Boolean(timedOut);
}
finally {
latch.countDown(); // signal that we finished
}
}
} );
t = new Thread(bgTask);
t.setDaemon( true );
t.setName("Lock timeout Test (bg)");
t.start();
boolean latchSet = latch.await( 10, TimeUnit.SECONDS ); // should return quickly on success
assertTrue( "background test thread finished (lock timeout is broken)", latchSet);
assertTrue( "background test thread timed out on lock attempt", bgTask.get().booleanValue() );
em.getTransaction().commit();
}
finally {
if ( em.getTransaction().isActive() ) {
em.getTransaction().rollback();
}
if ( t != null) { // wait for background thread to finish before deleting entity
t.join();
}
em.getTransaction().begin();
lock = em.getReference( Lock.class, lock.getId() );
em.remove( lock );
em.getTransaction().commit();
em.close();
em2.close();
}
}
@Test
public void testQueryTimeout() throws Exception {
EntityManager em = getOrCreateEntityManager();
final EntityManager em2 = createIsolatedEntityManager();
// TODO: replace dialect instanceof test with a Dialect.hasCapability
if ( ! (getDialect() instanceof Oracle10gDialect)) {
log.info("skipping testQueryTimeout");
return;
}
Lock lock = new Lock();
Thread t = null;
FutureTask<Boolean> bgTask = null;
final CountDownLatch latch = new CountDownLatch(1);
try {
lock.setName( "testQueryTimeout" );
em.getTransaction().begin();
em.persist( lock );
em.getTransaction().commit();
em.clear();
em.getTransaction().begin();
lock = em.getReference( Lock.class, lock.getId() );
em.lock( lock, LockModeType.PESSIMISTIC_WRITE );
final Integer id = lock.getId();
lock.getName(); // force entity to be read
log.info("testQueryTimeout: got write lock");
bgTask = new FutureTask<Boolean>( new Callable() {
public Boolean call() {
try {
boolean timedOut = false; // true (success) if LockTimeoutException occurred
em2.getTransaction().begin();
log.info("testQueryTimeout: (BG) about to read write-locked entity");
// we should block on the following read
Lock lock2 = em2.getReference( Lock.class, id );
lock2.getName(); // force entity to be read
log.info("testQueryTimeout: (BG) read write-locked entity");
try {
// we should block on the following read
Query query = em2.createQuery(
"select L from Lock_ L where L.id < 10000 ");
query.setLockMode( LockModeType.PESSIMISTIC_READ );
query.setHint( "javax.persistence.query.timeout", new Integer(500) ); // 1 sec timeout
List<Lock> resultList = query.getResultList();
String name = resultList.get(0).getName(); // force entity to be read
log.info("testQueryTimeout: name read =" + name);
}
catch( QueryTimeoutException e) {
// success
log.info("testQueryTimeout: (BG) got expected timeout exception");
timedOut = true;
}
catch ( Throwable e) {
log.info("testQueryTimeout: Expected LockTimeoutException but got unexpected exception", e);
}
em2.getTransaction().commit();
return new Boolean( timedOut );
}
finally {
latch.countDown(); // signal that we finished
}
}
} );
t = new Thread(bgTask);
t.setDaemon( true );
t.setName( "testQueryTimeout (bg)" );
t.start();
boolean latchSet = latch.await( 10, TimeUnit.SECONDS ); // should return quickly on success
assertTrue( "background test thread finished (lock timeout is broken)", latchSet);
assertTrue( "background test thread timed out on lock attempt", bgTask.get().booleanValue() );
em.getTransaction().commit();
}
finally {
if ( em.getTransaction().isActive() ) {
em.getTransaction().rollback();
}
if ( t != null) { // wait for background thread to finish before deleting entity
t.join();
}
em.getTransaction().begin();
lock = em.getReference( Lock.class, lock.getId() );
em.remove( lock );
em.getTransaction().commit();
em.close();
em2.close();
}
}
@Test
public void testQueryTimeoutEMProps() throws Exception {
// TODO: replace dialect instanceof test with a Dialect.hasCapability
if ( ! (getDialect() instanceof Oracle10gDialect)) {
log.info("skipping testQueryTimeout");
return;
}
EntityManager em = getOrCreateEntityManager();
Map queryTimeoutProps = new HashMap();
queryTimeoutProps.put("javax.persistence.query.timeout", new Integer(500) ); // 1 sec timeout (should round up)
final EntityManager em2 = createIsolatedEntityManager(queryTimeoutProps);
Lock lock = new Lock();
Thread t = null;
FutureTask<Boolean> bgTask = null;
final CountDownLatch latch = new CountDownLatch(1);
try {
lock.setName( "testQueryTimeout" );
em.getTransaction().begin();
em.persist( lock );
em.getTransaction().commit();
em.clear();
em.getTransaction().begin();
lock = em.getReference( Lock.class, lock.getId() );
em.lock( lock, LockModeType.PESSIMISTIC_WRITE );
final Integer id = lock.getId();
lock.getName(); // force entity to be read
log.info("testQueryTimeout: got write lock");
bgTask = new FutureTask<Boolean>( new Callable() {
public Boolean call() {
try {
boolean timedOut = false; // true (success) if LockTimeoutException occurred
em2.getTransaction().begin();
log.info("testQueryTimeout: (BG) about to read write-locked entity");
// we should block on the following read
Lock lock2 = em2.getReference( Lock.class, id );
lock2.getName(); // force entity to be read
log.info("testQueryTimeout: (BG) read write-locked entity");
try {
// we should block on the following read
Query query = em2.createQuery(
"select L from Lock_ L where L.id < 10000 ");
query.setLockMode( LockModeType.PESSIMISTIC_READ );
List<Lock> resultList = query.getResultList();
String name = resultList.get(0).getName(); // force entity to be read
log.info("testQueryTimeout: name read =" + name);
}
catch( QueryTimeoutException e) {
// success
log.info("testQueryTimeout: (BG) got expected timeout exception");
timedOut = true;
}
catch ( Throwable e) {
log.info("testQueryTimeout: Expected LockTimeoutException but got unexpected exception", e);
}
em2.getTransaction().commit();
return new Boolean( timedOut );
}
finally {
latch.countDown(); // signal that we finished
}
}
} );
t = new Thread(bgTask);
t.setDaemon( true );
t.setName( "testQueryTimeout (bg)" );
t.start();
boolean latchSet = latch.await( 10, TimeUnit.SECONDS ); // should return quickly on success
assertTrue( "background test thread finished (lock timeout is broken)", latchSet);
assertTrue( "background test thread timed out on lock attempt", bgTask.get().booleanValue() );
em.getTransaction().commit();
}
finally {
if ( em.getTransaction().isActive() ) {
em.getTransaction().rollback();
}
if ( t != null) { // wait for background thread to finish before deleting entity
t.join();
}
em.getTransaction().begin();
lock = em.getReference( Lock.class, lock.getId() );
em.remove( lock );
em.getTransaction().commit();
em.close();
em2.close();
}
}
@Test
public void testLockTimeoutEMProps() throws Exception {
EntityManager em = getOrCreateEntityManager();
Map TimeoutProps = new HashMap();
TimeoutProps.put("javax.persistence.lock.timeout", new Integer(1000) ); // 1 second timeout
final EntityManager em2 = createIsolatedEntityManager(TimeoutProps);
// TODO: replace dialect instanceof test with a Dialect.hasCapability (e.g. supportsPessimisticLockTimeout)
if ( ! (getDialect() instanceof Oracle10gDialect)) {
log.info("skipping testLockTimeoutEMProps");
return;
}
Lock lock = new Lock();
Thread t = null;
FutureTask<Boolean> bgTask = null;
final CountDownLatch latch = new CountDownLatch(1);
try {
lock.setName( "testLockTimeoutEMProps" );
em.getTransaction().begin();
em.persist( lock );
em.getTransaction().commit();
em.clear();
em.getTransaction().begin();
lock = em.getReference( Lock.class, lock.getId() );
em.lock( lock, LockModeType.PESSIMISTIC_WRITE );
final Integer id = lock.getId();
lock.getName(); // force entity to be read
log.info("testLockTimeoutEMProps: got write lock");
bgTask = new FutureTask<Boolean>( new Callable() {
public Boolean call() {
try {
boolean timedOut = false; // true (success) if LockTimeoutException occurred
em2.getTransaction().begin();
log.info("testLockTimeoutEMProps: (BG) about to read write-locked entity");
// we should block on the following read
Lock lock2 = em2.getReference( Lock.class, id );
lock2.getName(); // force entity to be read
log.info("testLockTimeoutEMProps: (BG) read write-locked entity");
// em2 already has javax.persistence.lock.timeout of 1 second applied
try {
em2.lock( lock2, LockModeType.PESSIMISTIC_WRITE);
}
catch( LockTimeoutException e) {
// success
log.info("testLockTimeoutEMProps: (BG) got expected timeout exception");
timedOut = true;
}
catch ( Throwable e) {
log.info("Expected LockTimeoutException but got unexpected exception", e);
}
em2.getTransaction().commit();
return new Boolean(timedOut);
}
finally {
latch.countDown(); // signal that we finished
}
}
} );
t = new Thread(bgTask);
t.setDaemon( true );
t.setName("Lock timeout Test (bg)");
t.start();
boolean latchSet = latch.await( 10, TimeUnit.SECONDS ); // should return quickly on success
assertTrue( "background test thread finished (lock timeout is broken)", latchSet);
assertTrue( "background test thread timed out on lock attempt", bgTask.get().booleanValue() );
em.getTransaction().commit();
}
finally {
if ( em.getTransaction().isActive() ) {
em.getTransaction().rollback();
}
if ( t != null) { // wait for background thread to finish before deleting entity
t.join();
}
em.getTransaction().begin();
lock = em.getReference( Lock.class, lock.getId() );
em.remove( lock );
em.getTransaction().commit();
em.close();
em2.close();
}
}
@Override
public Class[] getAnnotatedClasses() {
return new Class[]{
Lock.class,
UnversionedLock.class
};
}
}