| /* |
| * 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 WARRANTIESOR 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.aries.tx.control.jpa.common.impl; |
| |
| import java.util.concurrent.atomic.AtomicBoolean; |
| |
| import javax.persistence.EntityManager; |
| import javax.persistence.EntityManagerFactory; |
| |
| import org.osgi.service.transaction.control.TransactionControl; |
| import org.osgi.service.transaction.control.TransactionException; |
| import org.osgi.service.transaction.control.jpa.JPAEntityManagerProvider; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public abstract class AbstractJPAEntityManagerProvider implements JPAEntityManagerProvider, AutoCloseable { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(AbstractJPAEntityManagerProvider.class); |
| |
| private final EntityManagerFactory emf; |
| |
| private final Runnable onClose; |
| |
| private final AtomicBoolean closed = new AtomicBoolean(false); |
| |
| public AbstractJPAEntityManagerProvider(EntityManagerFactory emf, Runnable onClose) { |
| this.emf = emf; |
| this.onClose = onClose; |
| } |
| |
| @Override |
| public abstract EntityManager getResource(TransactionControl txControl) |
| throws TransactionException; |
| |
| |
| public EntityManager createEntityManager() { |
| if(closed.get()) throw new IllegalStateException("This resource provider is no longer in use"); |
| return emf.createEntityManager(); |
| } |
| |
| public void close() { |
| closed.set(true); |
| if(onClose != null) { |
| try { |
| onClose.run(); |
| } catch (Exception e) { |
| LOG.warn("An error occurred shutting down the JPAEntityManagerProvider {}", emf, e); |
| } |
| } |
| } |
| } |