statelessfundmanagerejb.txt

ejb的学习资料

import  javax.ejb.*;
//StatelessFundManager的实现类实现了SessionBean接口。
//StatelessFundManager的实现类还定义了远程组件接口中声明的远程方法。
public   class  StatelessFundManagerEJB  implements  SessionBean  {
    public   void  ejbRemove() { }
    public   void  ejbActivate()  { }
    public   void  ejbPassivate() { } 
    public   void  ejbSessionContext(SessionContext sc) { }
    public   void   ejbCreate() throws CreateException { }
    public   double  addFunds(double balance,double amount) {
              return (balance+=amount);
    }
  public   double  withdrawFunds( double  balance,double  amount)
      throws   InsufficientBalanceException {
        if ( balance<amount) {
           throws  (new  InsufficientBalanceException() );
        }
      balance=balance-amount;
      return  balance;
     }
}