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/*
* 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.tuscany.service.openjpa;
import java.util.Map;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import org.apache.tuscany.spi.ObjectCreationException;
import org.apache.tuscany.spi.component.CompositeComponent;
import org.apache.tuscany.spi.component.ScopeContainer;
import org.apache.tuscany.spi.component.TargetResolutionException;
import org.apache.tuscany.spi.extension.SystemAtomicComponentExtension;
/**
* A system service that manages a JPA <code>EntityManagerFactory</code>. This service is used by {@link
* EntityManagerProcessor} to inject an <code>EntityManager<code> on a constructor parameter, field, or method of an
* implementation instance. Since a JPA persistence context is specific to an application, this system service is scoped
* to the application composite. That is, it is contained as a system child of the application composite.
*
* @version $Rev$ $Date$
*/
public class JPAAtomicComponent extends SystemAtomicComponentExtension {
private EntityManagerFactory factory;
private String persistenceUnit;
private Map<Object, Object> configProps;
public JPAAtomicComponent(String name,
CompositeComponent parent,
ScopeContainer scopeContainer,
String persistenceUnit,
Map<Object, Object> configProps,
int initLevel) {
super(name, parent, initLevel);
assert persistenceUnit != null;
this.persistenceUnit = persistenceUnit;
this.configProps = configProps;
}
public Object createInstance() throws ObjectCreationException {
if (configProps != null) {
factory = Persistence.createEntityManagerFactory(persistenceUnit, configProps);
} else {
factory = Persistence.createEntityManagerFactory(persistenceUnit);
}
return factory;
}
public Object getTargetInstance() throws TargetResolutionException {
return factory;
}
}
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