/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.camel.component.jpa;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.PersistenceException;
import org.apache.camel.impl.ServiceSupport;
import org.springframework.orm.jpa.JpaCallback;
import org.springframework.orm.jpa.JpaTemplate;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.transaction.TransactionStatus;
import org.springframework.transaction.support.TransactionCallback;
import org.springframework.transaction.support.TransactionTemplate;
/**
* Delegates the strategy to the {@link JpaTemplate} and {@link TransactionTemplate} for transaction handling
*
* @version $Revision: 630591 $
*/
public class JpaTemplateTransactionStrategy extends ServiceSupport implements TransactionStrategy {
private final JpaTemplate jpaTemplate;
private final TransactionTemplate transactionTemplate;
public JpaTemplateTransactionStrategy(JpaTemplate jpaTemplate, TransactionTemplate transactionTemplate) {
this.jpaTemplate = jpaTemplate;
this.transactionTemplate = transactionTemplate;
}
/**
* Creates a new implementation from the given JPA factory
*/
public static JpaTemplateTransactionStrategy newInstance(EntityManagerFactory emf) {
JpaTemplate template = new JpaTemplate(emf);
return newInstance(emf, template);
}
public static JpaTemplateTransactionStrategy newInstance(EntityManagerFactory emf, JpaTemplate template) {
JpaTransactionManager transactionManager = new JpaTransactionManager(emf);
transactionManager.afterPropertiesSet();
TransactionTemplate tranasctionTemplate = new TransactionTemplate(transactionManager);
tranasctionTemplate.afterPropertiesSet();
return new JpaTemplateTransactionStrategy(template, tranasctionTemplate);
}
public Object execute(final JpaCallback callback) {
return transactionTemplate.execute(new TransactionCallback() {
public Object doInTransaction(TransactionStatus status) {
return jpaTemplate.execute(new JpaCallback() {
public Object doInJpa(EntityManager entityManager) throws PersistenceException {
return callback.doInJpa(entityManager);
}
});
}
});
}
protected void doStart() throws Exception {
}
protected void doStop() throws Exception {
}
}