createtest.java

Hiberante程序高手秘籍的源代码

package com.oreilly.hh;

import net.sf.hibernate.*;
import net.sf.hibernate.cfg.Configuration;

import java.sql.Time;
import java.util.*;

/**
 * Create more sample data, letting Hibernate persist it for us.
 */
public class CreateTest {

    /**
     * Look up an artist record given a name.
     * @param name the name of the artist desired.
     * @param create controls whether a new record should be created if
     *        the specified artist is not yet in the database.
     * @param session the Hibernate session that can retrieve data
     * @return the artist with the specified name, or <code>null</code> if no
     *         such artist exists and <code>create</code> is <code>false</code>.
     * @throws HibernateException if there is a problem.
     */
    public static Artist getArtist(String name, boolean create,
                                   Session session)
        throws HibernateException
    {
        Query query = session.getNamedQuery(
                          "com.oreilly.hh.artistByName");
        query.setString("name", name);
        Artist found = (Artist)query.uniqueResult();
        if (found == null && create) {
            found = new Artist(name, null, new HashSet());
            session.save(found);
        }
        if (found != null && found.getActualArtist() != null) {
            return found.getActualArtist();
        }
        return found;
    }

    /**
     * Utility method to associate an artist with a track
     */
    private static void addTrackArtist(Track track, Artist artist) {
        track.getArtists().add(artist);
    }

    public static void main(String args[]) throws Exception {
        // Create a configuration based on the properties file we've put
        // in the standard place.
        Configuration config = new Configuration();

        // Tell it about the classes we want mapped, taking advantage of
        // the way we've named their mapping documents.
        config.addClass(Track.class).addClass(Artist.class);

        // Get the session factory we can use for persistence
        SessionFactory sessionFactory = config.buildSessionFactory();

        // Ask for a session using the JDBC information we've configured
        Session session = sessionFactory.openSession();
        Transaction tx = null;
        try {
            // Create some data and persist it
            tx = session.beginTransaction();

            Track track = new Track("Russian Trance",
                                    "vol2/album610/track02.mp3",
                                    Time.valueOf("00:03:30"), new Date(),
                                    (short)0, SourceMedia.CD,
                                    new HashSet(), new HashSet());
            addTrackArtist(track, getArtist("PPK", true, session));
            session.save(track);

            track = new Track("Video Killed the Radio Star",
                              "vol2/album611/track12.mp3",
                              Time.valueOf("00:03:49"), new Date(),
                              (short)0, SourceMedia.VHS,
                              new HashSet(), new HashSet());
            addTrackArtist(track, getArtist("The Buggles", true, session));
            session.save(track);

            
            track = new Track("Gravity's Angel",
                              "vol2/album175/track03.mp3",
                              Time.valueOf("00:06:06"), new Date(),
                              (short)0, SourceMedia.CD,
                              new HashSet(), new HashSet());
            addTrackArtist(track, getArtist("Laurie Anderson", true, session));
            session.save(track);

            track = new Track("Adagio for Strings (Ferry Corsten Remix)",
                              "vol2/album972/track01.mp3",
                              Time.valueOf("00:06:35"), new Date(),
                              (short)0, SourceMedia.CD,
                              new HashSet(), new HashSet());
            addTrackArtist(track, getArtist("William Orbit", true, session));
            addTrackArtist(track, getArtist("Ferry Corsten", true, session));
            addTrackArtist(track, getArtist("Samuel Barber", true, session));
            session.save(track);

            track = new Track("Adagio for Strings (ATB Remix)",
                              "vol2/album972/track02.mp3",
                              Time.valueOf("00:07:39"), new Date(),
                              (short)0, SourceMedia.CD,
                              new HashSet(), new HashSet());
            addTrackArtist(track, getArtist("William Orbit", true, session));
            addTrackArtist(track, getArtist("ATB", true, session));
            addTrackArtist(track, getArtist("Samuel Barber", true, session));
            session.save(track);

            track = new Track("The World '99",
                              "vol2/singles/pvw99.mp3",
                              Time.valueOf("00:07:05"), new Date(),
                              (short)0, SourceMedia.STREAM,
                              new HashSet(), new HashSet());
            addTrackArtist(track, getArtist("Pulp Victim", true, session));
            addTrackArtist(track, getArtist("Ferry Corsten", true, session));
            session.save(track);

            track = new Track("Test Tone 1",
                              "vol2/singles/test01.mp3",
                              Time.valueOf("00:00:10"), new Date(),
                              (short)0, null, new HashSet(), new HashSet());
            track.getComments().add("Pink noise to test equalization");
            session.save(track);

            // We're done; make our changes permanent
            tx.commit();

        } catch (Exception e) {
            if (tx != null) {
                // Something went wrong; discard all partial changes
                tx.rollback();
            }
            throw e;
        } finally {
            // No matter what, close the session
            session.close();
        }

        // Clean up after ourselves
        sessionFactory.close();
    }
}