nl.b3p.flamingomover.EMFListener.java Source code

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Here is the source code for nl.b3p.flamingomover.EMFListener.java

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package nl.b3p.flamingomover;

import java.util.HashMap;
import java.util.Map;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 *
 * @author Meine Toonen <meinetoonen@b3partners.nl>
 */
public class EMFListener implements ServletContextListener {
    private static final Log log = LogFactory.getLog(EMFListener.class);
    private static EntityManagerFactory oracle;
    private static EntityManagerFactory postgres;

    public static EntityManager getPostgresEM() {
        return postgres.createEntityManager();
    }

    public static EntityManager getOracleEM() {
        return oracle.createEntityManager();
    }

    @Override
    public void contextInitialized(ServletContextEvent sce) {
        try {
            Map<Object, Object> propsSrc = new HashMap<Object, Object>();
            propsSrc.put("javax.persistence.nonJtaDataSource", "java:comp/env/jdbc/oracle");

            oracle = Persistence.createEntityManagerFactory("viewer-config-oracle", propsSrc);

            Map<Object, Object> propsDest = new HashMap<Object, Object>();
            propsDest.put("javax.persistence.nonJtaDataSource", "java:comp/env/jdbc/postgres");
            postgres = Persistence.createEntityManagerFactory("viewer-config-postgresql", propsDest);
        } catch (Exception e) {
            log.error("cannot instantiate emfs: ", e);
        }
    }

    @Override
    public void contextDestroyed(ServletContextEvent sce) {
        if (oracle != null && oracle.isOpen()) {
            oracle.close();
        }
        if (postgres != null && postgres.isOpen()) {
            postgres.close();
        }
    }

}