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Class examples.cluster.ejb.teller.TellerBean

java.lang.Object
   |
   +----examples.cluster.ejb.teller.TellerBean

public class TellerBean
extends Object
implements SessionBean

TellerBean is a stateless SessionBean. This bean illustrates:

No persistence of state between calls to the SessionBean
Accessing properties in a deployment descriptor
Finding entity beans
Using bean-managed transactions with entity beans
Connecting to a database from within a session bean
Application-defined exceptions

Author:: Copyright (c) 1999-2000 by BEA Systems, Inc. All Rights Reserved.

TellerBean()

balance(String): Returns the balance of the account in a TellerResult object.
checkTransactionId(String): Returns true if the transaction with a given id was completed (ie, the transaction ID can be found in the transaction log table).
deposit(String, double, String): Deposits amount in specified account using a specific transactionID.
ejbActivate(): This method is required by the EJB Specification, but is not used by this example.
ejbCreate(): This method corresponds to the create method in the home interface "TellerHome.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.
setSessionContext(SessionContext): Sets the session context, server name, properties, maximum log table size and the log pool name.
transfer(String, String, double, String): Transfers amount from accountFrom to accountTo using a specific transactionID.
withdraw(String, double, String): Withdraws amount from specified account using a specific transactionID.

TellerBean

 public TellerBean()

ejbActivate

 public void ejbActivate() throws RemoteException

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

ejbRemove

 public void ejbRemove() throws RemoteException

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

ejbPassivate

 public void ejbPassivate() throws RemoteException

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, server name, properties, maximum log table size and the log pool name.

Parameters:: ctx - SessionContext

ejbCreate

 public void ejbCreate()

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

See Also:: Teller

balance

 public TellerResult balance(String accountId) throws TellerException, RemoteException

Returns the balance of the account in a TellerResult object.

Parameters:: accountId - String Account ID
Returns:: TellerResult Result of inquiry
Throws: TellerException: if there is an error while checking the balance
Throws: RemoteException: if there is a communications or systems failure

deposit

 public TellerResult deposit(String accountId,
                             double amount,
                             String transactionId) throws TellerException, RemoteException

Deposits amount in specified account using a specific transactionID.

Parameters:: accountId - String Account ID; amount - double Amount to deposit; transactionId - String Transaction ID
Returns:: TellerResult Result of inquiry
Throws: TellerException: if there is an error while making the deposit
Throws: RemoteException: if there is a communications or systems failure

withdraw

 public TellerResult withdraw(String accountId,
                              double amount,
                              String transactionId) throws TellerException, RemoteException

Withdraws amount from specified account using a specific transactionID.

Parameters:: accountId - String Account ID; amount - double Amount to withdraw; transactionId - String Transaction ID
Returns:: TellerResult Result of inquiry
Throws: TellerException: if there is an error while making the withdrawal
Throws: RemoteException: if there is a communications or systems failure

transfer

 public TellerResult transfer(String accountFrom,
                              String accountTo,
                              double amount,
                              String transactionId) throws TellerException, RemoteException

Transfers amount from accountFrom to accountTo using a specific transactionID.

Parameters:: accountFrom - String Account ID of account taking amount from; accountTo - String Account ID of account sending amount to; amount - double Amount to transfer; transactionId - String Transaction ID
Returns:: TellerResult Result of inquiry
Throws: TellerException: if there is an error while making the transfer
Throws: RemoteException: if there is a communications or systems failure

checkTransactionId

 public boolean checkTransactionId(String transactionId) throws RemoteException

Returns true if the transaction with a given id was completed (ie, the transaction ID can be found in the transaction log table).

Note that the code in this method is specific for Oracle databases and would require adjustment for other databases.

Parameters:: transactionID - String Transaction ID
Returns:: boolean
Throws: RemoteException: if there is a communications or systems failure

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