statefulaccountbean.java

J2EE 技术 源码 书籍源代码（j2ee编程技术）

package com.ejbstudy;
import javax.ejb.CreateException;
import javax.ejb.SessionBean;
/**
 * @ejb.bean name="StatefulAccount"
 *	jndi-name="StatefulAccountBean"
 *	type="Stateful" 
 * 
 *--
 * This is needed for JOnAS.
 * If you are not using JOnAS you can safely remove the tags below.
 * @jonas.bean ejb-name="StatefulAccount"
 *	jndi-name="StatefulAccountBean"
 * 
 *--
 **/
public abstract class StatefulAccountBean implements SessionBean {
private double account;

/**
 * @ejb.interface-method
 *	view-type="remote" 
**/
public void depoist( double amount)throws  Exception{ 
	if(amount<0)throw new Exception("Invalid amount");
	account+=amount;
}
/**
 * @ejb.interface-method
 *	view-type="remote" 
**/
public double  withdraw( double amount)throws  Exception{ 
	if(amount<0)throw new Exception("Invalid amount");
	if(account< amount)throw new Exception("not engouch money");
	account-=amount;
 return 0.0; 
}
/**
 * @ejb.interface-method
 *	view-type="remote" 
**/
public double  getBalance(){ 
 return account; 
}
/**
 * @ejb.create-method
 *	view-type="remote" 
**/
public void ejbCreate(double amount)throws CreateException{ 
	if (amount<0)
		throw new CreateException("Invalid amount");
		account=amount;
}
public void ejbCreate()throws CreateException{ 
	
		account=100.00;
}
}