/*
* Copyright 2013 Red Hat Inc. and/or its affiliates and other contributors.
*
* 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 org.switchyard.component.camel.jpa.deploy;
import java.util.Map;
import javax.naming.InitialContext;
import javax.persistence.EntityManagerFactory;
import javax.persistence.spi.PersistenceProvider;
import org.jboss.logging.Logger;
/**
* EntityManagerFactory locator for Camel JPA component.
*/
public final class EntityManagerFactoryLocator {
private static Logger _logger = Logger.getLogger(EntityManagerFactoryLocator.class);
/**
* OSGi specific PersistenceProvider JNDI name.
*/
public static final String OSGI_PERSISTENCE_PROVIDER_JNDI_NAME = "osgi:service/javax.persistence.spi.PersistenceProvider";
/**
* OSGi specific EntityManagerFactory JNDI name.
*/
public static final String OSGI_ENTITY_MANAGER_FACTORY_JNDI_NAME = "osgi:service/javax.persistence.EntityManagerFactory";
private EntityManagerFactoryLocator() {
}
/**
* Lookup EntityManagerFactory from JNDI.
* @param unitName JPA unit name.
* @param props A Map of properties for use by the persistence provider.
* @return EntityManagerFactory
*/
public static EntityManagerFactory locateEntityManagerFactory(String unitName, Map<?,?> props) {
InitialContext ic = null;
try {
ic = new InitialContext();
} catch (Exception e) {
_logger.debug(e);
return null;
}
try {
EntityManagerFactory emf = (EntityManagerFactory) lookupInJndi(ic, OSGI_ENTITY_MANAGER_FACTORY_JNDI_NAME);
if (emf != null) {
return emf;
}
PersistenceProvider pp = (PersistenceProvider) lookupInJndi(ic, OSGI_PERSISTENCE_PROVIDER_JNDI_NAME);
if (pp != null) {
return pp.createEntityManagerFactory(unitName, props);
}
} finally {
try {
ic.close();
} catch (Exception e) {
_logger.debug(e);
}
}
return null;
}
private static Object lookupInJndi(InitialContext ic, String name) {
try {
return ic.lookup(name);
} catch (Exception e) {
_logger.debug(e);
return null;
}
}
}