org.springframework.orm.jpa.vendor.OpenJpaDialect Maven / Gradle / Ivy
/*
* Copyright 2002-2006 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 org.springframework.orm.jpa.vendor;
import java.sql.Connection;
import java.sql.SQLException;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceException;
import org.apache.openjpa.persistence.OpenJPAEntityManager;
import org.springframework.jdbc.datasource.ConnectionHandle;
import org.springframework.jdbc.datasource.SimpleConnectionHandle;
import org.springframework.orm.jpa.DefaultJpaDialect;
import org.springframework.transaction.TransactionDefinition;
import org.springframework.transaction.TransactionException;
/**
* {@link org.springframework.orm.jpa.JpaDialect} implementation for
* Apache OpenJPA. Developed and tested against OpenJPA 0.9.6.
*
* @author Costin Leau
* @since 2.0
*/
public class OpenJpaDialect extends DefaultJpaDialect {
@Override
public ConnectionHandle getJdbcConnection(EntityManager entityManager, boolean readOnly)
throws PersistenceException, SQLException {
Connection connection = (Connection) getOpenJPAEntityManager(entityManager).getConnection();
return new SimpleConnectionHandle(connection);
}
@Override
public void releaseJdbcConnection(ConnectionHandle conHandle, EntityManager em)
throws PersistenceException, SQLException {
if (conHandle != null && conHandle.getConnection() != null) {
conHandle.getConnection().close();
}
}
@Override
public Object beginTransaction(EntityManager entityManager, TransactionDefinition definition)
throws PersistenceException, SQLException, TransactionException {
super.beginTransaction(entityManager, definition);
if (!definition.isReadOnly()) {
// Like with TopLink, make sure to start the logic transaction early so that other
// participants using the connection (such as JdbcTemplate) run in a transaction.
getOpenJPAEntityManager(entityManager).beginStore();
}
return null;
}
/**
* Return the OpenJPA-specific interface of EntityManager.
* @param em the generic EntityManager instance
* @return the OpenJPA-specific interface of EntityManager
*/
protected OpenJPAEntityManager getOpenJPAEntityManager(EntityManager em) {
return (OpenJPAEntityManager) em;
}
}