productclient.java

EJB实践的服务器是用SUN的服务器

package examples;

import javax.ejb.*;
import javax.naming.*;
import java.rmi.*;
import javax.rmi.PortableRemoteObject;
import java.util.*;

/**
 * Client test application on a CMP Entity Bean, Product.
 */
public class ProductClient {

  public static void main(String[] args) throws Exception {

    ProductHome home = null;

    try {
      /*
       * Get a reference to the Product Home Object - the
       * factory for Product EJB Objects
       */
      Context ctx = new InitialContext(System.getProperties());
      home = (ProductHome) PortableRemoteObject.narrow(
        ctx.lookup("ProductHome"), ProductHome.class);

      /*
       * Use the factory to create the Product EJB Object
       */
      home.create("123-456-7890", "P5-350", "350 Mhz Pentium", 200);
      home.create("123-456-7891", "P5-400", "400 Mhz Pentium", 300);
      home.create("123-456-7892", "P5-450", "450 Mhz Pentium", 400);
      home.create("123-456-7893", "SD-64", "64 MB SDRAM", 50);
      home.create("123-456-7894", "SD-128", "128 MB SDRAM", 100);
      home.create("123-456-7895", "SD-256", "256 MB SDRAM", 200);

      /*
       * Find a Product, and print out it's description
       */
      Iterator i = home.findByName("SD-64").iterator();
      System.out.println("These products match the name SD-64:");
      while (i.hasNext()) {
        Product prod = (Product) PortableRemoteObject.narrow(
          i.next(), Product.class);
        System.out.println(prod.getDescription());
      }

      /*
       * Find all products that cost $200
       */
      System.out.println("Finding all products that cost $200");
      i = home.findByBasePrice(200).iterator();

      while (i.hasNext()) {
        Product prod = (Product) PortableRemoteObject.narrow(
          i.next(), Product.class);
        System.out.println(prod.getDescription());
      }
    }
    catch (Exception e) {
      e.printStackTrace();
    }
    finally {
      if (home != null) {
        System.out.println("Destroying products..");

        /*
         * Find all the products
         */
        Iterator i = home.findAllProducts().iterator();
        while (i.hasNext()) {
          try {
            Product prod = (Product) PortableRemoteObject.narrow(
              i.next(), Product.class);
            if (prod.getProductID().startsWith("123")) {
              prod.remove();
            }
          }
          catch (Exception e) {
            e.printStackTrace();
          }
        }
      }
    }
  }
}