001 /** 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017 package org.apache.camel.component.jpa; 018 019 import javax.persistence.EntityManager; 020 import javax.persistence.EntityManagerFactory; 021 import javax.persistence.PersistenceException; 022 023 import org.apache.camel.impl.ServiceSupport; 024 025 import org.springframework.orm.jpa.JpaCallback; 026 import org.springframework.orm.jpa.JpaTemplate; 027 import org.springframework.orm.jpa.JpaTransactionManager; 028 import org.springframework.transaction.TransactionStatus; 029 import org.springframework.transaction.support.TransactionCallback; 030 import org.springframework.transaction.support.TransactionTemplate; 031 032 /** 033 * Delegates the strategy to the {@link JpaTemplate} and {@link TransactionTemplate} for transaction handling 034 * 035 * @version $Revision: 563665 $ 036 */ 037 public class JpaTemplateTransactionStrategy extends ServiceSupport implements TransactionStrategy { 038 private final JpaTemplate jpaTemplate; 039 private final TransactionTemplate transactionTemplate; 040 041 public JpaTemplateTransactionStrategy(JpaTemplate jpaTemplate, TransactionTemplate transactionTemplate) { 042 this.jpaTemplate = jpaTemplate; 043 this.transactionTemplate = transactionTemplate; 044 } 045 046 /** 047 * Creates a new implementation from the given JPA factory 048 */ 049 public static JpaTemplateTransactionStrategy newInstance(EntityManagerFactory emf) { 050 JpaTemplate template = new JpaTemplate(emf); 051 return newInstance(emf, template); 052 } 053 054 public static JpaTemplateTransactionStrategy newInstance(EntityManagerFactory emf, JpaTemplate template) { 055 JpaTransactionManager transactionManager = new JpaTransactionManager(emf); 056 transactionManager.afterPropertiesSet(); 057 058 TransactionTemplate tranasctionTemplate = new TransactionTemplate(transactionManager); 059 tranasctionTemplate.afterPropertiesSet(); 060 061 return new JpaTemplateTransactionStrategy(template, tranasctionTemplate); 062 } 063 064 public Object execute(final JpaCallback callback) { 065 return transactionTemplate.execute(new TransactionCallback() { 066 public Object doInTransaction(TransactionStatus status) { 067 return jpaTemplate.execute(new JpaCallback() { 068 public Object doInJpa(EntityManager entityManager) throws PersistenceException { 069 return callback.doInJpa(entityManager); 070 } 071 }); 072 } 073 }); 074 } 075 076 protected void doStart() throws Exception { 077 } 078 079 protected void doStop() throws Exception { 080 } 081 }