/*
* Copyright 2011-2014 the original author or authors.
*
* 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 pl.com.bottega.testutils;
import java.sql.Connection;
import java.sql.SQLException;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceException;
import org.hibernate.Session;
import org.hibernate.jdbc.Work;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.jdbc.datasource.DataSourceUtils;
import org.springframework.orm.jpa.vendor.HibernateJpaDialect;
import org.springframework.transaction.TransactionDefinition;
import org.springframework.transaction.TransactionException;
/**
* Solution for @ Transactional(isolation = Isolation.SERIALIZABLE) problem
*
* http://amitstechblog.wordpress.com/2011/05/31/supporting-custom-isolation-levels-with-jpa/
*
*/
@SuppressWarnings("serial")
public class HibernateExtendedJpaDialect extends HibernateJpaDialect {
private Logger logger = LoggerFactory.getLogger(HibernateExtendedJpaDialect.class);
/**
* This method is overridden to set custom isolation levels on the connection
* @param entityManager
* @param definition
* @return
* @throws PersistenceException
* @throws SQLException
* @throws TransactionException
*/
@Override
public Object beginTransaction(final EntityManager entityManager,
final TransactionDefinition definition) throws PersistenceException,
SQLException, TransactionException {
Session session = (Session) entityManager.getDelegate();
if (definition.getTimeout() != TransactionDefinition.TIMEOUT_DEFAULT) {
getSession(entityManager).getTransaction().setTimeout(definition.getTimeout());
}
entityManager.getTransaction().begin();
logger.debug("Transaction started");
session.doWork(new Work() {
public void execute(Connection connection) throws SQLException {
logger.debug("The connection instance is {}", connection);
logger.debug("The isolation level of the connection is {} and the isolation level set on the transaction is {}",
connection.getTransactionIsolation(), definition.getIsolationLevel());
DataSourceUtils.prepareConnectionForTransaction(connection, definition);
}
});
return prepareTransaction(entityManager, definition.isReadOnly(), definition.getName());
}
}