| /** |
| * 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.springframework.orm.jpa.JpaCallback; |
| import org.springframework.orm.jpa.JpaTemplate; |
| import org.springframework.orm.jpa.JpaTransactionManager; |
| import org.springframework.transaction.PlatformTransactionManager; |
| 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 |
| */ |
| public class JpaTemplateTransactionStrategy 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); |
| } |
| |
| /** |
| * Creates a new implementation from the given JPA factory and JPA 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); |
| } |
| |
| /** |
| * Creates a new implementation from the given Transaction Manager and JPA template |
| */ |
| public static JpaTemplateTransactionStrategy newInstance(PlatformTransactionManager transactionManager, JpaTemplate template) { |
| TransactionTemplate tranasctionTemplate = new TransactionTemplate(transactionManager); |
| tranasctionTemplate.afterPropertiesSet(); |
| |
| return new JpaTemplateTransactionStrategy(template, tranasctionTemplate); |
| } |
| |
| @SuppressWarnings("unchecked") |
| 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); |
| } |
| }); |
| } |
| }); |
| } |
| |
| } |