package com.sixsq.slipstream.persistence;
/*
* +=================================================================+
* SlipStream Server (WAR)
* =====
* Copyright (C) 2013 SixSq Sarl (sixsq.com)
* =====
* Licensed 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.
* -=================================================================-
*/
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
public class PersistenceUtil {
private static final EntityManagerFactory emf = buildEntityManagerFactory();
private static EntityManagerFactory buildEntityManagerFactory() {
String persistenceUnit = System.getProperty("persistence.unit","hsqldb-mem-schema");
try {
return Persistence.createEntityManagerFactory(persistenceUnit);
} catch (Exception ex) {
System.err.println("Initial EntityManagerFactory creation failed:"
+ ex.getMessage());
throw new ExceptionInInitializerError(ex);
}
}
public static EntityManagerFactory getEntityManagerFactory() {
return emf;
}
public static EntityManager createEntityManager() {
return getEntityManagerFactory().createEntityManager();
}
}