package dbj.odmg;

import COM.POET.odmg.*;
import COM.POET.odmg.collection.*;
import java.util.Properties;
import java.util.Enumeration;
import java.io.IOException;
import java.io.FileInputStream;

public class Deliver {
    Database dbase;
    
    public Deliver (Database db) {
	dbase = db;
    }
    
    public void tryToDeliver () throws ODMGException {
	BagOfObject orders;
	Transaction tx = new Transaction ();
	
	tx.begin ();
	try {
	    orders = (BagOfObject) dbase.lookup ("orders");
	    Enumeration e = orders.elements ();
	    System.out.println ("# of orders = " + orders.size ());
	    while (e.hasMoreElements ()) {
		BookOrder o = (BookOrder) e.nextElement ();
		System.out.println ("try to deliver: " + o);
		if (o.getStatus () == BookOrder.OPEN) {
		    if (o.deliver ())
			System.out.println ("delivered: " + o);
		}
	    }
	}
	catch (ObjectNameNotFoundException e) { 
	    System.out.println ("fatal error: orders not found !");
	    tx.abort ();
	    return;
	}
	catch (ODMGException exc) {
	    tx.abort ();
	    throw exc;
	}
	tx.commit ();
    }
    
    public static void main (String args[]) throws IOException {
	Properties props = new Properties ();
	props.load (new FileInputStream ("dbj.properties"));

	try {
	    Database db = Database.open (props.getProperty ("odmg.database"), 
					 Database.openReadWrite);
	    Deliver app = new Deliver (db);
	    app.tryToDeliver ();
	}
	catch (Exception exc) {
	    exc.printStackTrace ();
	}
    }
}