package com.weecode.plugin.comics.model.emf;

import java.util.HashMap;
import java.util.Map;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;

import org.eclipse.persistence.jpa.config.PersistenceUnitProperties;
import org.eclipse.persistence.jpa.osgi.PersistenceProvider;
/**
 * 
 * @author Jason Kusnier and Tim Hollosy
 *
 */
public abstract class ComicsEntityManagerFactory {
	
	private static EntityManagerFactory emf = null;
	private static Map<String, String> properties = new HashMap<String, String>();
	
	private static void init() {
		properties.put(PersistenceUnitProperties.TARGET_DATABASE, "Derby");
		properties.put(PersistenceUnitProperties.JDBC_DRIVER, "org.apache.derby.jdbc.ClientDriver");
		properties.put(PersistenceUnitProperties.JDBC_URL, "jdbc:derby://localhost:1527/sample;create=true");
		properties.put(PersistenceUnitProperties.JDBC_USER, "app");
		properties.put(PersistenceUnitProperties.JDBC_PASSWORD, "app");
		properties.put(PersistenceUnitProperties.JDBC_READ_CONNECTIONS_MIN, "1");
		properties.put(PersistenceUnitProperties.JDBC_WRITE_CONNECTIONS_MIN, "1");
//		properties.put(PersistenceUnitProperties.CACHE_SHARED_DEFAULT, "true");
		properties.put(PersistenceUnitProperties.BATCH_WRITING, "JDBC");
		
		properties.put("eclipselink.logging.level", "FINE");
		properties.put("eclipselink.logging.timestamp", "false");
		properties.put("eclipselink.logging.session", "false");
		properties.put("eclipselink.logging.thread", "false");
		
		emf = new PersistenceProvider().createEntityManagerFactory("comics", properties, ComicsEntityManagerFactory.class.getClassLoader());
	}
	
	public static EntityManager createEntityManager() {
		if (emf == null)
			init();
		
		return emf.createEntityManager();
	}
}