| /* |
| * 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.batchee.extras.jpa; |
| |
| import org.apache.batchee.doc.api.Documentation; |
| |
| import javax.batch.api.BatchProperty; |
| import javax.batch.api.chunk.ItemWriter; |
| import javax.inject.Inject; |
| import javax.persistence.EntityManager; |
| import java.io.Serializable; |
| import java.util.List; |
| |
| @Documentation("Write all items using JPA") |
| public class JpaItemWriter extends EntityManagerLocator implements ItemWriter { |
| @Inject |
| @BatchProperty |
| @Documentation("If set to true merge() will be used instead of persist()") |
| private String useMerge; |
| |
| @Inject |
| @BatchProperty |
| @Documentation("Should JPA transaction be used (default false)") |
| private String jpaTransaction; |
| |
| private boolean merge; |
| private boolean transaction; |
| |
| @Override |
| public void open(final Serializable checkpoint) throws Exception { |
| emProvider = findEntityManager(); |
| merge = Boolean.parseBoolean(useMerge); |
| transaction = Boolean.parseBoolean(jpaTransaction); |
| } |
| |
| @Override |
| public void close() throws Exception { |
| if (emProvider != null) { |
| emProvider.release(); |
| } |
| } |
| |
| @Override |
| public void writeItems(final List<Object> items) throws Exception { |
| final EntityManager em = emProvider.getValue().newEntityManager(); |
| try { |
| if (transaction) { |
| em.getTransaction().begin(); |
| } |
| |
| for (final Object o : items) { |
| if (!merge) { |
| em.persist(o); |
| } else { |
| em.merge(o); |
| } |
| } |
| |
| if (transaction) { |
| em.getTransaction().commit(); |
| } else { |
| em.flush(); |
| } |
| } finally { |
| emProvider.getValue().release(em); |
| } |
| } |
| |
| @Override |
| public Serializable checkpointInfo() throws Exception { |
| return null; |
| } |
| } |