stockdispenserimpl.java

关系型数据库 Postgresql 6.5.2

package example.corba;

import org.omg.CosNaming.*;

/**
 * This class implements the server side of the example.
 *
 * $Id: StockDispenserImpl.java,v 1.1 1999/01/25 21:22:03 scrappy Exp $
 */
public class StockDispenserImpl extends stock._StockDispenserImplBase
{
    private int maxObjects = 10;
    private int numObjects = 0;
    private StockItemStatus[] stock = new StockItemStatus[maxObjects];
    
    public StockDispenserImpl(String[] args,String name,int num)
    {
	super();
	
	try {
	    // get reference to orb
	    org.omg.CORBA.ORB orb = org.omg.CORBA.ORB.init(args,null);
	    
	    // prestart num objects
	    if(num>=maxObjects)
		num=maxObjects;
	    numObjects = num;
	    for(int i=0;i<numObjects;i++) {
		stock[i] = new StockItemStatus();
		stock[i].ref = new StockItemImpl(args,"StockItem"+(i+1));
		orb.connect(stock[i].ref);
	    }
	} catch(org.omg.CORBA.SystemException e) {
	    e.printStackTrace();
	}
    }
    
    /**
     * This method, defined in stock.idl, reserves a slot in the dispenser
     */
    public stock.StockItem reserveItem() throws stock.StockException
    {
	for(int i=0;i<numObjects;i++) {
	    if(!stock[i].inUse) {
		stock[i].inUse = true;
		System.out.println("Reserving slot "+i);
		return stock[i].ref;
	    }
	}
	return null;
    }
    
    /**
     * This releases a slot from the dispenser
     */
    public void releaseItem(stock.StockItem item) throws stock.StockException
    {
	for(int i=0;i<numObjects;i++) {
	    if(stock[i].ref.getInstanceName().equals(item.getInstanceName())) {
		stock[i].inUse = false;
		System.out.println("Releasing slot "+i);
		return;
	    }
	}
	System.out.println("Reserved object not a member of this dispenser");
	return;
    }
    
    /**
     * This class defines a slot in the dispenser
     */
    class StockItemStatus
    {
	StockItemImpl ref;
	boolean inUse;
	
	StockItemStatus() {
	    ref = null;
	    inUse = false;
	}
    }
    
}