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Class examples.ejb.basic.beanManaged.AccountBean

java.lang.Object
   |
   +----examples.ejb.basic.beanManaged.AccountBean

public class AccountBean

extends Object

implements EntityBean

• EJBean-managed persistence and transactions; the code in this file directly accesses the data storage.
• Application-defined exceptions.

Author:

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

accountId

balance

AccountBean()

balance()

Returns current balance.

deposit(double)

Adds amount to balance.

ejbActivate()

Required by the EJB specification, this method is not used by this example.

ejbCreate(String, double)

This method corresponds to the create method in the home interface "AccountHome.java".

ejbFindBigAccounts(double)

Finds all EJBeans with a balance greater than a given amount.

ejbFindByPrimaryKey(AccountPK)

Given a Primary Key, refreshes the EJBean from the persistent storage.

ejbFindSavingsAccount()

Throws a FinderException as there is no savings account.

ejbLoad()

Refreshes the EJBean from the persistent storage.

ejbPassivate()

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

ejbPostCreate(String, double)

Required by the EJB specification, this method is not used by this example.

ejbRemove()

Deletes the EJBean from the persistent storage.

ejbStore()

Stores the EJBean in the persistent storage.

getConnection()

Gets current connection to the connection pool.

id()

Returns the Primary Key identifying this EJBean.

setEntityContext(EntityContext)

Sets the EntityContext for the EJBean.

unsetEntityContext()

Unsets the EntityContext for the EJBean.

withdraw(double)

Subtracts amount from balance.

 public String accountId

 public double balance

 public AccountBean()

 public String id()

Returns the Primary Key identifying this EJBean.

Returns:

String Identification

 public void ejbActivate() throws RemoteException

Required by the EJB specification, this method is not used by this example.

Throws: RemoteException

if there is a communications or systems failure

 public void setEntityContext(EntityContext ctx) throws RemoteException

Sets the EntityContext for the EJBean.

Parameters:

ctx - EntityContext

Throws: RemoteException

if there is a communications or systems failure

 public void unsetEntityContext() throws RemoteException

Unsets the EntityContext for the EJBean.

Throws: RemoteException

if there is a communications or systems failure

 public void ejbPassivate() throws RemoteException

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

Throws: RemoteException

if there is a communications or systems failure

 public void ejbLoad() throws RemoteException

Refreshes the EJBean from the persistent storage.

Throws: RemoteException

if there is a communications or systems failure

 public AccountPK ejbFindByPrimaryKey(AccountPK pk) throws FinderException, RemoteException

Given a Primary Key, refreshes the EJBean from the persistent storage.

Parameters:

pk - AccountPK Primary Key

Returns:

AccountPK Primary Key

Throws: RemoteException

if there is a communications or systems failure

Throws: FinderException

thrown if the EJBean cannot be found

 public void ejbStore() throws RemoteException

Stores the EJBean in the persistent storage.

Throws: RemoteException

if there is a communications or systems failure

 public void ejbRemove() throws RemoteException

Deletes the EJBean from the persistent storage.

Throws: RemoteException

if there is a communications or systems failure

 public AccountPK ejbCreate(String accountId,
                            double initialBalance) throws CreateException

This method corresponds to the create method in the home interface "AccountHome.java". The parameter sets of the two methods are identical. When the client calls AccountHome.create(), the container (which in WebLogic EJB is also the home) allocates an instance of this bean and calls AccountBean.ejbCreate().

For bean-managed persistence, ejbCreate() returns a primary key, unlike the case of container-managed persistence, where it returns a void.

Parameters:

accountID - String Account ID

initialBalance - Double Initial Balance

Returns:

AccountPK

Throws: CreateException

if there is a problem creating the bean

 public void ejbPostCreate(String accountId,
                           double initialBalance)

Required by the EJB specification, this method is not used by this example.

Parameters:

accountID - String Account Identification

initialBalance - double Initial Balance

 public Enumeration ejbFindBigAccounts(double balanceGreaterThan) throws FinderException, RemoteException

Finds all EJBeans with a balance greater than a given amount. Returns an Enumeration of found EJBean primary keys.

Parameters:

balanceGreaterThan - double Test Amount

Returns:

Enumeration EJBean Primary Keys

Throws: RemoteException

if there is a communications or systems failure

Throws: FinderException

if an error occurs while accessing the persistent storage

 public AccountPK ejbFindSavingsAccount() throws FinderException, RemoteException

Throws a FinderException as there is no savings account.

Returns:

AccountPK EJBean primary key

Throws: FinderException

if there is a problem finding the bean

Throws: RemoteException

if there is a communications or systems failure

 public double deposit(double amount) throws ProcessingErrorException

Adds amount to balance.

Parameters:

amount - double Amount

Returns:

double balance

Throws: ProcessingErrorException

if there is an error making a deposit

 public double withdraw(double amount) throws ProcessingErrorException

Subtracts amount from balance.

Parameters:

amount - double Amount

Returns:

double Balance

Throws: ProcessingErrorException

if Amount > Balance.

 public double balance()

Returns current balance.

Returns:

double Balance

 public Connection getConnection() throws SQLException

Gets current connection to the connection pool.

Returns:

Connection

Throws: SQLException

if there is an error getting a Connection

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