carttestclient.java~2~

EJB 实例

package ejb;

import java.lang.Object;
import javax.naming.*;
import javax.rmi.PortableRemoteObject;
import java.lang.String;
import java.util.Date;
import javax.ejb.Handle;
import java.rmi.RemoteException;
import javax.ejb.EJBMetaData;
import javax.ejb.HomeHandle;
import java.util.List;

public class CartTestClient extends Object {
    private static final String ERROR_NULL_REMOTE = "Remote interface reference is null.  It must be created by calling one of the Home interface methods first.";
    private Cart cart = null;
    private CartHome cartHome = null;

    //Construct the EJB test client
    public CartTestClient1() {
        initialize();
    }

    public void initialize() {

        try {

            //get naming context
            Context context = new InitialContext();
            //look up jndi name
            Object ref = context.lookup("Cart");
            //look up jndi name and cast to Home interface
            cartHome = (CartHome) PortableRemoteObject.narrow(ref, CartHome.class);

        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    //----------------------------------------------------------------------------
    // Methods that use Home interface methods to generate a Remote interface reference
    //----------------------------------------------------------------------------

    public Cart create(String cardHolderName, String creditCardNumber,
                       Date expirationDate) {
        try {
            cart = cartHome.create(cardHolderName, creditCardNumber,
                                   expirationDate);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return cart;
    }

    public EJBMetaData getEJBMetaData() {
        EJBMetaData returnValue = null;
        try {
            returnValue = cartHome.getEJBMetaData();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return returnValue;
    }

    public HomeHandle getHomeHandle() {
        HomeHandle returnValue = null;
        try {
            returnValue = cartHome.getHomeHandle();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return returnValue;
    }

    public void remove(Object object) {
        try {
            cartHome.remove(object);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void remove(Handle handle) {
        try {
            cartHome.remove(handle);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    //----------------------------------------------------------------------------
    // Methods that use Remote interface methods to access data through the bean
    //----------------------------------------------------------------------------

    public void addItem() throws RemoteException {
        /**@todo Update these variables with appropriate values for calling addItem().*/
        Item item = null;
        if (cart == null) {
            System.out.println("Error in addItem(): " + ERROR_NULL_REMOTE);
            return;
        }

        cart.addItem(item);
    }

    public List getContents() throws RemoteException {
        List returnValue = null;
        if (cart == null) {
            System.out.println("Error in getContents(): " + ERROR_NULL_REMOTE);
            return returnValue;
        }

        returnValue = cart.getContents();
        return returnValue;
    }

    public float getTotalPrice() throws RemoteException {
        float returnValue = 0f;
        if (cart == null) {
            System.out.println("Error in getTotalPrice(): " + ERROR_NULL_REMOTE);
            return returnValue;
        }

        returnValue = cart.getTotalPrice();
        return returnValue;
    }

    public void purchase() throws RemoteException {
        if (cart == null) {
            System.out.println("Error in purchase(): " + ERROR_NULL_REMOTE);
            return;
        }

        cart.purchase();
    }

    public void removeItem() throws RemoteException {
        /**@todo Update these variables with appropriate values for calling removeItem().*/
        Item item = null;
        if (cart == null) {
            System.out.println("Error in removeItem(): " + ERROR_NULL_REMOTE);
            return;
        }

        cart.removeItem(item);
    }

    //----------------------------------------------------------------------------
    // Utility Methods
    //----------------------------------------------------------------------------

    public CartHome getHome() {
        return cartHome;
    }

    //Main method
    public static void main(String[] args) {
        CartTestClient1 client = new CartTestClient1();
        // Use the getHome() method of the client object to call Home interface
        // methods that will return a Remote interface reference.  Then
        // use that Remote interface reference to access the EJB.
    }
}