examples.database.EntityManagerFactoryProvider Maven / Gradle / Ivy

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/*
 * Copyright 2016-2017 Testify Project.
 *
 * 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 examples.database;

import java.util.HashMap;
import java.util.Map;
import javax.inject.Inject;
import javax.inject.Singleton;
import javax.persistence.EntityManagerFactory;
import static javax.persistence.Persistence.createEntityManagerFactory;
import javax.sql.DataSource;
import org.glassfish.hk2.api.Factory;
import org.hibernate.boot.model.naming.ImplicitNamingStrategyComponentPathImpl;
import org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl;
import static org.hibernate.cfg.AvailableSettings.DATASOURCE;
import static org.hibernate.cfg.AvailableSettings.IMPLICIT_NAMING_STRATEGY;
import static org.hibernate.cfg.AvailableSettings.PHYSICAL_NAMING_STRATEGY;
import org.jvnet.hk2.annotations.Service;

/**
 * A factory class that provides an entity manager factory.
 *
 * @author saden
 */
@Service
public class EntityManagerFactoryProvider implements Factory {

    private final DataSource dataSource;

    @Inject
    EntityManagerFactoryProvider(DataSource dataSource) {
        this.dataSource = dataSource;
    }

    @Singleton
    @Override
    public EntityManagerFactory provide() {
        Map properties = new HashMap<>();
        properties.put(DATASOURCE, dataSource);
        properties.put(PHYSICAL_NAMING_STRATEGY, new PhysicalNamingStrategyStandardImpl());
        properties.put(IMPLICIT_NAMING_STRATEGY, new ImplicitNamingStrategyComponentPathImpl());

        return createEntityManagerFactory("example.greetings", properties);
    }

    @Override
    public void dispose(EntityManagerFactory instance) {
        instance.close();
    }
}