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Class examples.ejb.basic.statefulSession.TraderBean

java.lang.Object
   |
   +----examples.ejb.basic.statefulSession.TraderBean

public class TraderBean
extends Object
implements SessionBean

TraderBean is a stateful SessionBean. This EJBean illustrates:

Automatic persistence of state between calls to the SessionBean
Application-defined exceptions

Author:: Copyright (c) 1998 by WebLogic, Inc. All Rights Reserved.; Copyright (c) 1998-1999 by BEA WebXpress. All Rights Reserved.

traderName
tradingBalance

TraderBean()

buy(String, String, int): Buys shares of a stock for a named customer.
ejbActivate(): This method is required by the EJB Specification, but is not used by this example.
ejbCreate(String): This method corresponds to the create method in the home interface "TraderHome.java".
ejbPassivate(): This method is required by the EJB Specification, but is not used by this example.
ejbRemove(): This method is required by the EJB Specification, but is not used by this example.
getBalance(): Returns the current balance of a trading session.
getDatabaseName(): Returns the JDBC pool name.
getStockPrice(String): Returns the stock price for a given stock.
getTradeLimit(): Returns the trading limit.
getTraderName(): Returns the name of this Trader.
sell(String, String, int): Sells shares of a stock for a named customer.
setSessionContext(SessionContext): Sets the session context.

traderName

 public String traderName

tradingBalance

 public double tradingBalance

TraderBean

 public TraderBean()

ejbActivate

 public void ejbActivate()

This method is required by the EJB Specification, but is not used by this example.

ejbRemove

 public void ejbRemove()

This method is required by the EJB Specification, but is not used by this example.

ejbPassivate

 public void ejbPassivate()

This method is required by the EJB Specification, but is not used by this example.

setSessionContext

 public void setSessionContext(SessionContext ctx)

Sets the session context.

Parameters:: ctx - SessionContext Context for session

ejbCreate

 public void ejbCreate(String traderName)

This method corresponds to the create method in the home interface "TraderHome.java". The parameter sets of the two methods are identical. When the client calls TraderHome.create(), the container allocates an instance of the EJBean and calls ejbCreate().

Parameters:: traderName - String Trader Name
See Also:: Trader

buy

 public TradeResult buy(String customerName,
                        String stockSymbol,
                        int shares) throws ProcessingErrorException

Buys shares of a stock for a named customer.

Parameters:: customerName - String Customer name; stockSymbol - String Stock symbol; shares - int Number of shares to buy
Returns:: TradeResult Trade Result
Throws: ProcessingErrorException: if there is an error while buying the shares

sell

 public TradeResult sell(String customerName,
                         String stockSymbol,
                         int shares) throws ProcessingErrorException

Sells shares of a stock for a named customer.

Parameters:: customerName - String Customer name; stockSymbol - String Stock symbol; shares - int Number of shares to buy
Returns:: TradeResult Trade Result
Throws: ProcessingErrorException: if there is an error while selling the shares

getTraderName

 public String getTraderName()

Returns the name of this Trader.

Returns:: String traderName

getBalance

 public double getBalance()

Returns the current balance of a trading session.

Returns:: double Balance

getTradeLimit

 public int getTradeLimit()

Returns the trading limit.

Returns:: int Trading limit

getDatabaseName

 public String getDatabaseName()

Returns the JDBC pool name.

Returns:: String JDBC pool name

getStockPrice

 public double getStockPrice(String stockSymbol) throws ProcessingErrorException

Returns the stock price for a given stock.

Parameters:: stockSymbol - String Stock symbol
Returns:: double Stock price
Throws: ProcessingErrorException: if there is an error while checking the price

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