rocketimpl.java

java设计模式源码

package com.oozinoz.remote;

/*
 * Copyright (c) 2001, 2005. Steven J. Metsker.
 * 
 * Steve Metsker makes no representations or warranties about
 * the fitness of this software for any particular purpose, 
 * including the implied warranty of merchantability.
 *
 * Please use this software as you wish with the sole
 * restriction that you may not claim that you wrote it.
 */

import java.rmi.*;
import java.rmi.server.UnicastRemoteObject;

/**
 * This class demonstrates how to implement an RMI interface.
 * @author Steven J. Metsker
 */
public class RocketImpl extends UnicastRemoteObject implements Rocket {
    protected double price;
    protected double apogee;

    /**
     * Construct a rocket with the given price and apogee.
     */
    public RocketImpl(double price, double apogee) throws RemoteException {
        this.price = price;
        this.apogee = apogee;
    }

    /**
     * Set a factor to adjust a particular rocket's apogee.
     * @param factor the factor
     */
    public void boost(double factor) {
        apogee *= factor;
    }

    /**
     * @return the expected height this rocket will reach
     */
    public double getApogee() throws RemoteException {
        return apogee;
    }

    /**
     * @return the price of this rocket
     */
    public double getPrice() throws RemoteException {
        return price;
    }
}