vault.queryrouter.common.util.HibernateUtil.java Source code

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Here is the source code for vault.queryrouter.common.util.HibernateUtil.java

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/*
* 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 vault.queryrouter.common.util;

import vault.queryrouter.common.Constant;
import org.hibernate.SessionFactory;
import org.hibernate.boot.MetadataSources;
import org.hibernate.boot.registry.StandardServiceRegistry;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Util for Hibernate
 */
public class HibernateUtil {

    private static SessionFactory sessionFactory;
    private static Logger logger = LoggerFactory.getLogger(HibernateUtil.class);

    private static void init() {

        //Standard hibernate XML
        StandardServiceRegistryBuilder registryBuilder = new StandardServiceRegistryBuilder().configure();

        //Configuration from config file
        registryBuilder.applySetting("hibernate.connection.url", Constant.getBackendDbConnString());
        registryBuilder.applySetting("hibernate.connection.username", Constant.getBackendDbUsername());
        registryBuilder.applySetting("hibernate.connection.password", Constant.getBackendDbPassword());

        StandardServiceRegistry registry = registryBuilder.build();

        try {
            sessionFactory = new MetadataSources(registry).buildMetadata().buildSessionFactory();

        } catch (Throwable ex) {
            StandardServiceRegistryBuilder.destroy(registry);
            logger.error("Fail to init Hibernate", ex);
            throw new RuntimeException(ex);
        }
    }

    public static void shutdown() {
        sessionFactory.close();
        sessionFactory = null;
    }

    public static SessionFactory getSessionFactory() {
        if (sessionFactory == null)
            init();

        return sessionFactory;
    }
}