/*
 *
 * Copyright (c) 2000 Scott Oaks and Henry Wong. All Rights Reserved.
 *
 * Permission to use, copy, modify, and distribute this software
 * and its documentation for NON-COMMERCIAL purposes and
 * without fee is hereby granted.
 *
 * This sample source code is provided for example only,
 * on an unsupported, as-is basis. 
 *
 * AUTHOR MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
 * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
 * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE, OR NON-INFRINGEMENT. AUTHOR SHALL NOT BE LIABLE FOR
 * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
 * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
 *
 * THIS SOFTWARE IS NOT DESIGNED OR INTENDED FOR USE OR RESALE AS ON-LINE
 * CONTROL EQUIPMENT IN HAZARDOUS ENVIRONMENTS REQUIRING FAIL-SAFE
 * PERFORMANCE, SUCH AS IN THE OPERATION OF NUCLEAR FACILITIES, AIRCRAFT
 * NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL, DIRECT LIFE
 * SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH THE FAILURE OF THE
 * SOFTWARE COULD LEAD DIRECTLY TO DEATH, PERSONAL INJURY, OR SEVERE
 * PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH RISK ACTIVITIES").  AUTHOR
 * SPECIFICALLY DISCLAIMS ANY EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR
 * HIGH RISK ACTIVITIES.
 */


import java.io.*;
import java.rmi.*;
import net.jini.core.lease.*;
import net.jini.space.*;

public class ConvertServiceRegistrationImpl implements ConvertServiceRegistration, Serializable {

    private JavaSpace js;
    private Lease lease;

    public ConvertServiceRegistrationImpl(JavaSpace js, Lease l) {
        this.js = js;
        this.lease = l;
    }

    // Code to convert. This code runs on the client and puts the request
    // into the JavaSpace and then reads out the result. A previous result
    // will be cached and we'll get that too.
    public String convert(int i) throws RemoteException {

        try {
            // See if there's a cached result (done == true) already
            Conversion request = new Conversion(5, true);
            Conversion result = (Conversion) js.read(request, null, JavaSpace.NO_WAIT);
            if (result == null) {
                // There was no cached result. Make a new request and retrieve
                // that answer
                request.done = new Boolean(false);
                js.write(request, null, Lease.FOREVER);
                request.done = new Boolean(true);
                result = (Conversion) js.read(request, null, Long.MAX_VALUE);
            }
            // else just use the cached value

            return result.result;
        } catch (Exception e) {
            throw new RemoteException("convert", e);
        }
    }

    public Lease getLease() {
        return lease;
    }
}