ordercontrollerbean.java

一个java

package bookstore.ejb;

import bookstore.util.*;

import java.sql.*;
import javax.sql.*;
import java.util.*;
import javax.ejb.*;


public class OrderControllerBean implements SessionBean
{
  SessionContext sessionContext;
  private String orderID;
  private OrdersHome orderHome;
  private Orders order;
  private Connection con;

  /*************************** removal methods*****************************/

public String createOrder(OrderDetails orderValue) throws Exception {
      // makes a new Order and enters it into db,
      // returns OrderId

      System.out.println("OrderControllerBean createOrder");

      try
      {
        order = orderHome.create(orderValue);
      }
      catch (Exception ex)
      {
          throw new EJBException
           ("createOrder: " + ex.getMessage());
      }

      return orderID;
  }// createOrder

  public String createOrderFromBasket(BasketDetails basketValue) throws Exception {
      // makes a new Book and enters it into db,
      // returns BookId

      System.out.println("BookControllerBean createBookFromBasket");
      String orderId;

      try
      {
          OrderDetails orderValue=new OrderDetails("",basketValue.getCustomerID(),
                                                   basketValue.getBookID(),1,
                                                   basketValue.getAddDate(),null);
          orderId=createOrder(orderValue);

          BasketControllerHome basketControllerHome=EJBGetter.getBasketControllerHome();
          BasketController basketController=basketControllerHome.create();
          basketController.removeBasket(basketValue.getBasketID());

       }
      catch (Exception ex)
      {
          throw new EJBException
           ("createOrderFromBasket: " + ex.getMessage());
      }

      return orderId;
  }// createOrderFromBasket


  public void removeOrder(String orderId) throws NoSuchEntityException {
    //抛出RunTimeException的子类,有利于事务管理

       // removes Order from db

        System.out.println("OrderControllerBean removeOrder");

        if (isOrderExist(orderId) == false)
            throw new NoSuchEntityException(orderId);

        try {
             order.remove();//Order已在isOrderExist中获得
            }catch (Exception ex)
            {
             throw new EJBException
             ("removeOrder: " + ex.getMessage());
        }

    } // removeOrder

    public void updateOrder(OrderDetails orderValue)
        throws NoSuchEntityException
     {
       System.out.println("OrderControllerBean updateOrder");

       if (isOrderExist(orderValue.getOrderID()) == false)
            throw new NoSuchEntityException(orderValue.getOrderID());

         order.setCustomerID(orderValue.getCustomerID());
         order.setBookID(orderValue.getBookID());
         order.setNum(orderValue.getNum());
         order.setOrderDate(orderValue.getOrderDate());
         order.setDeliverDate(orderValue.getDeliverDate());

     }//updateOrder

     //获取待处理订单
     public ArrayList getOrders() throws ObjectNotFoundException
           {

              System.out.println("OrderControllerBean getOrders");

              Collection orders;

              try
              {
                  String condition="deliverDate is null";
                  orders =orderHome.findByCondition(condition);
                  if (orders.isEmpty())
                      throw new ObjectNotFoundException();
              } catch (Exception ex) {
                   throw new ObjectNotFoundException();
              }

              ArrayList orderValues = new ArrayList();

              Iterator i = orders.iterator();
              while (i.hasNext()) {
                  Orders ord= (Orders)i.next();
                  OrderDetails orderValue=ord.getDetails();
                  orderValues.add(orderValue);
              }
              return orderValues;

            }//getOrders
  //获取可处理订单,即书库存数量不为负数
  //并发货
  public ArrayList getOrdersAble() throws ObjectNotFoundException
           {

              System.out.println("OrderControllerBean getOrders");

              Collection orders;

              try
              {
                  String SQLStatement="select OrderID from orders ,book "+
                                      "where orders.bookID=book.bookID and book.StockNum >= 0";
                  orders =orderHome.findOrderAble(SQLStatement);
                  if (orders.isEmpty())
                      throw new ObjectNotFoundException();
              } catch (Exception ex) {
                   throw new ObjectNotFoundException();
              }

              ArrayList orderValues = new ArrayList();

              Iterator i = orders.iterator();
              java.util.Date utilDate=new java.util.Date();
              java.sql.Date date=new java.sql.Date(utilDate.getTime());
              while (i.hasNext())
              {
                  Orders ord= (Orders)i.next();
                  OrderDetails orderValue=ord.getDetails();
                  //设置处理日期
                  ord.setDeliverDate(date);
                  orderValues.add(orderValue);
              }
              return orderValues;

            }//getOrdersAble
    public OrderDetails getOrderValue(String orderId)
       {
         System.out.println("orderControllerBean getorderValue");
         try
              {
                  order = orderHome.findByPrimaryKey(orderId);
                  this.orderID = orderId;
              } catch (Exception ex)
              {
                  return null;
              }
              return order.getDetails();
       }

/******************************ejb methods*********************************/

  public void ejbCreate() throws CreateException {
    System.out.println("OrderControllerBean ejbCreate");

        try {
            //创建下一层的引导接口
            orderHome=EJBGetter.getOrderHome();

        } catch (Exception ex) {
             System.out.println("OrderControllerBean catch");
             throw new EJBException("ejbCreate: " +
                 ex.getMessage());
        }

        order = null;
        orderID = null;
  }//ejbCreate

  public void ejbRemove() {
    /**@todo Complete this method*/
  }
  public void ejbActivate() {
    /**@todo Complete this method*/
  }
  public void ejbPassivate() {
    /**@todo Complete this method*/
  }
  public void setSessionContext(SessionContext sessionContext) {
    this.sessionContext = sessionContext;
  }
  /******************************util methods****************************/
  private boolean isOrderExist(String orderId) {

        // If a business method has been invoked with
        // a different OrderId, then update the
        // OrderId and Order variables.
        // Return null if the Order is not found.

        System.out.println("OrderControllerBean isOrderExist");

        if (orderId.equals(this.orderID) == false)
        {
            try
            {
                order = orderHome.findByPrimaryKey(orderId);
                this.orderID = orderId;
            } catch (Exception ex)
            {
                return false;
            }
        } // if
        return true;

    }// isOrderExist

}