/*
* 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.
*/
package openbook.server;
import java.util.HashMap;
import java.util.Map;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import javax.persistence.PersistenceContextType;
/**
* A container of persistence units. Typically a JEE container will create, manage and inject
* the persistence units to the user artifacts.
*
* @author Pinaki Poddar
*
*/
public class ServiceFactory {
private static final Map<String, OpenBookService> _services = new HashMap<String, OpenBookService>();
public synchronized static OpenBookService getService(String unit) {
return getService(unit, null);
}
/**
* Creates a persistence unit of given name configured with the given
* name-value parameters.
*
* @param unit name of the persistence unit. A <code>META-INF/persistence.xml</code> must be
* available with the same unit name in the classpath.
*/
public synchronized static OpenBookService getService(String unit, Map<String,Object> config) {
OpenBookService service = _services.get(unit);
if (service == null) {
EntityManagerFactory emf = Persistence.createEntityManagerFactory(unit, config);
service = new OpenBookServiceImpl(unit, emf, false, PersistenceContextType.TRANSACTION);
_services.put(unit, service);
}
return service;
}
}