account.java

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package com.ejb;

import java.rmi.RemoteException;

import javax.ejb.EJBException;
import javax.ejb.SessionBean;
import javax.ejb.SessionContext;

import javax.ejb.CreateException;

/**
 * XDoclet-based session bean.  The class must be declared
 * public according to the EJB specification.
 *
 * To generate the EJB related files to this EJB:
 *		- Add Standard EJB module to XDoclet project properties
 *		- Customize XDoclet configuration for your appserver
 *		- Run XDoclet
 *
 * Below are the xdoclet-related tags needed for this EJB.
 * 
 * @ejb.bean name="Account"
 *           display-name="Name for Account"
 *           description="Description for Account"
 *           jndi-name="ejb/Account"
 *           type="Stateful"
 *           view-type="remote"
 */
public class Account implements SessionBean {

	/** The session context */
	private SessionContext context;
	private double fundBalance;

	public Account() {
		super();
		// TODO 自动生成构造函数存根
	}

	/**
	 * Set the associated session context. The container calls this method 
	 * after the instance creation.
	 * 
	 * The enterprise bean instance should store the reference to the context 
	 * object in an instance variable.
	 * 
	 * This method is called with no transaction context. 
	 * 
	 * @throws EJBException Thrown if method fails due to system-level error.
	 */
	public void setSessionContext(SessionContext newContext)
		throws EJBException {
		context = newContext;
	}

	public void ejbRemove() throws EJBException, RemoteException {
		// TODO 自动生成方法存根

	}

	public void ejbActivate() throws EJBException, RemoteException {
		// TODO 自动生成方法存根

	}

	public void ejbPassivate() throws EJBException, RemoteException {
		// TODO 自动生成方法存根

	}

	/**
	 * Default create method
	 * 
	 * @throws CreateException
	 * @ejb.create-method
	 */
	public void ejbCreate(double fund) throws CreateException {
		// TODO Auto-generated method stub
		if ( fund < 0 )
		{
			throw new CreateException("Invalid fund");
		}
		this.fundBalance = fund;
	}

	/**
	 * An example business method
	 *
	 * @ejb.interface-method view-type = "remote"
	 * 
	 * @throws EJBException Thrown if method fails due to system-level error.
	 */
	public void addFunds(double fund) throws EJBException {
		// rename and start putting your business logic here
		if ( fund < 0 )
		{
			throw new EJBException("Invalid fund");
		}
		this.fundBalance += fund;
	}
	/**
	 * An example business method
	 *
	 * @ejb.interface-method view-type = "remote"
	 * 
	 * @throws EJBException Thrown if method fails due to system-level error.
	 */	
	public void removeFunds(double fund) throws EJBException {
		if ( fund < 0 )
		{
			throw new EJBException("Invalid fund");
		}
		if( this.fundBalance< fund )
		{
			throw new EJBException("The balance less than fund");
		}
		this.fundBalance -= fund;
	}
	/**
	 * An example business method
	 *
	 * @ejb.interface-method view-type = "remote"
	 * 
	 * @throws EJBException Thrown if method fails due to system-level error.
	 */
	public double getBalance() throws EJBException {
		return this.fundBalance;
	}

}