org.rapidoid.quick.QuickJPA Maven / Gradle / Ivy

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package org.rapidoid.quick;

/*
 * #%L
 * rapidoid-quick
 * %%
 * Copyright (C) 2014 - 2015 Nikolche Mihajlovski and 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.
 * #L%
 */

import java.util.List;
import java.util.Map;
import java.util.Properties;

import javax.persistence.Entity;
import javax.persistence.EntityManager;

import org.hibernate.SessionFactory;
import org.hibernate.engine.spi.SessionFactoryImplementor;
import org.hibernate.jpa.boot.internal.SettingsImpl;
import org.hibernate.jpa.internal.EntityManagerFactoryImpl;
import org.rapidoid.annotation.Authors;
import org.rapidoid.annotation.Since;
import org.rapidoid.config.Conf;
import org.rapidoid.ctx.PersisterProvider;
import org.rapidoid.io.IO;
import org.rapidoid.u.U;
import org.rapidoid.webapp.FindClasses;

@Authors("Nikolche Mihajlovski")
@Since("3.0.0")
public class QuickJPA implements PersisterProvider {

	private final Object[] args;

	@SuppressWarnings("deprecation")
	private static org.hibernate.ejb.HibernateEntityManagerFactory emFactory;

	public QuickJPA(Object... args) {
		this.args = args;
	}

	@SuppressWarnings("deprecation")
	private static synchronized org.hibernate.ejb.HibernateEntityManagerFactory emFactory(Object[] args) {

		if (emFactory == null) {

			org.hibernate.cfg.AnnotationConfiguration cfg = new org.hibernate.cfg.AnnotationConfiguration();

			List> entityTypes = FindClasses.annotated(Entity.class);
			for (Class entityType : entityTypes) {
				cfg.addAnnotatedClass(entityType);
			}

			for (Object arg : args) {
				if (arg instanceof Class) {
					Class entityType = (Class) arg;
					if (!entityTypes.contains(entityType)) {
						cfg.addAnnotatedClass(entityType);
					}
				}
			}

			cfg.addProperties(hibernateProperties());
			SessionFactory sf = cfg.buildSessionFactory();

			SessionFactoryImplementor sfi = (SessionFactoryImplementor) sf;

			SettingsImpl settings = new SettingsImpl();

			emFactory = new EntityManagerFactoryImpl("pu", sfi, settings, U.map(), cfg);
		}

		return emFactory;
	}

	public static Properties hibernateProperties() {

		Properties properties = new Properties();
		Map props;

		if (Conf.production()) {
			props = IO.loadMap("hibernate-prod.properties");
			if (props == null) {
				props = IO.loadMap("hibernate-prod.default.properties");
			}
		} else {
			props = IO.loadMap("hibernate-dev.properties");
			if (props == null) {
				props = IO.loadMap("hibernate-dev.default.properties");
			}
		}

		if (props != null) {
			properties.putAll(props);
		}

		return properties;
	}

	@SuppressWarnings("unchecked")
	@Override
	public  P openPersister() {
		return (P) emFactory(args).createEntityManager();
	}

	@Override
	public void closePersister(Object persister) {
		EntityManager em = (EntityManager) persister;
		em.close();
	}

}