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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;
+ }
+
+
+}