client.java

Java的面向对象数据库系统的源代码

// $Id: Client.java,v 1.3 2003/11/23 15:19:37 per_nyfelt Exp $
package odmg;

import org.odmg.*;
import org.ozoneDB.odmg.*;


/**
 * This simple sample shows how to use the ODMG interface of ozone. The are
 * a few things in the ozone ODMG interface that are not fully ODMG 3.0
 * compliant. So, care must be taken when writing code against this API.<p>
 * 
 * First, database objects do not implement any database specific interfaces.
 * This means the actual database connection cannot be simple retrieved by
 * calling the database() method of the database object.
 * 
 * 
 * @author <a href="http://www.softwarebuero.de/">SMB</a>
 * @version $Revision: 1.3 $Date: 2003/11/23 15:19:37 $
 */
public class Client {
    
    public static ODMG odmg;
    
    
    public static void main( String[] args ) throws Exception {
        odmg = new OzoneODMG();
        
        EnhDatabase db = (EnhDatabase)odmg.newDatabase();
        db.open( "ozonedb:remote://localhost:3333", Database.OPEN_READ_WRITE );
        
        Transaction tx = odmg.newTransaction();
        tx.begin();
        
        Bus bus = new Bus( "bus" );
        bus.print();
        
        Auto auto = null;
        try {
            auto = (Auto)db.lookup( "name" );
        } catch (Exception e) {
            // auto = new AutoImpl ("Name");
            auto = (Auto)db.createPersistent( AutoImpl.class );
            System.out.println( auto.getClass().getSuperclass().getName() );
            System.out.println( Thread.currentThread().getName() + ": " + auto );
            db.bind( auto, "name" );
        } 
        
        auto.setName( "Trabant" );
        System.out.println( Thread.currentThread().getName() + ": " + auto );
        
        auto.doSomething();
        
        AccessThread t1 = new AccessThread( db, tx );
        t1.start();
        
        Thread.sleep( 3000 );
        
        // db.deletePersistent (auto);
        
        tx.commit();
        
        db.close();
    } 
}