EntityManagerCreator.java

/***
 * Copyright (c) 2009 Caelum - www.caelum.com.br/opensource
 * All rights reserved.
 *
 * 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 br.com.caelum.vraptor.jpa;

import javax.enterprise.context.RequestScoped;
import javax.enterprise.inject.Disposes;
import javax.enterprise.inject.Produces;
import javax.inject.Inject;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;

/**
 * An {@link EntityManager} producer, that creates an instance for each request.
 * 
 * @author Lucas Cavalcanti
 * @author Otávio Garcia
 */
public class EntityManagerCreator {

	private final EntityManagerFactory factory;

	/**
	 * @deprecated CDI eyes only.
	 */
	protected EntityManagerCreator() {
		this(null);
	}

	@Inject
	public EntityManagerCreator(EntityManagerFactory factory) {
		this.factory = factory;
	}

	@Produces
	@RequestScoped
	public EntityManager getEntityManager() {
		return factory.createEntityManager();
	}

	public void destroy(@Disposes EntityManager entityManager) {
		if (entityManager.isOpen()) {
			entityManager.close();
		}
	}

}