001 /** 002 * 003 * Licensed to the Apache Software Foundation (ASF) under one or more 004 * contributor license agreements. See the NOTICE file distributed with 005 * this work for additional information regarding copyright ownership. 006 * The ASF licenses this file to You under the Apache License, Version 2.0 007 * (the "License"); you may not use this file except in compliance with 008 * the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, software 013 * distributed under the License is distributed on an "AS IS" BASIS, 014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 015 * See the License for the specific language governing permissions and 016 * limitations under the License. 017 */ 018 package org.apache.camel.component.jpa; 019 020 import org.apache.camel.Exchange; 021 import org.apache.camel.Expression; 022 import org.apache.camel.converter.ObjectConverter; 023 import org.apache.camel.impl.DefaultProducer; 024 import org.springframework.orm.jpa.JpaCallback; 025 026 import javax.persistence.EntityManager; 027 import javax.persistence.PersistenceException; 028 import java.util.Iterator; 029 030 /** 031 * @version $Revision: 525547 $ 032 */ 033 public class JpaProducer extends DefaultProducer<Exchange> { 034 private final TransactionStrategy template; 035 private final Expression<Exchange> expression; 036 037 public JpaProducer(JpaEndpoint endpoint, Expression<Exchange> expression) { 038 super(endpoint); 039 this.expression = expression; 040 this.template = endpoint.createTransactionStrategy(); 041 } 042 043 public void process(Exchange exchange) { 044 final Object values = expression.evaluate(exchange); 045 if (values != null) { 046 template.execute(new JpaCallback() { 047 public Object doInJpa(EntityManager entityManager) throws PersistenceException { 048 Iterator iter = ObjectConverter.iterator(values); 049 while (iter.hasNext()) { 050 Object value = iter.next(); 051 entityManager.persist(value); 052 } 053 return null; 054 } 055 }); 056 } 057 } 058 }