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Class examples.ejb.basic.containerManaged.AccountBean

examples.ejb.basic.containerManaged.AccountBean

public class AccountBean

• Container-managed JDBC persistence and transactions; the code in this file never directly accesses the data storage.
• Application-defined exceptions.
• The use of the WebLogic extension isModified; methods that modify a container managed field set isDirty to true. ejbStore sets isModified to false at the end of the transaction.

accountId

 

accountType

 

balance

 

AccountBean()

 

accountType()

Returns the account type.

balance()

Returns current balance.

deposit(double)

Adds amount to balance.

ejbActivate()

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

ejbCreate(String, double, String)

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

ejbLoad()

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

ejbPassivate()

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

ejbPostCreate(String, double, String)

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.

ejbStore()

Sets the EJBean's modified flag to false.

isModified()

Returns whether the EJBean has been modified or not.

setEntityContext(EntityContext)

Sets the EntityContext for the EJBean.

setModified(boolean)

Sets the EJBean's modified flag.

unsetEntityContext()

Unsets the EntityContext for the EJBean.

withdraw(double)

Subtracts amount from balance.

public java.lang.String accountId

public double balance

public java.lang.String accountType

public AccountBean()

public void setEntityContext(javax.ejb.EntityContext ctx)

          Sets the EntityContext for the EJBean.

Parameters:

ctx - EntityContext

public void unsetEntityContext()

          Unsets the EntityContext for the EJBean.

public boolean isModified()

          Returns whether the EJBean has been modified or not. This method must be public for the container to be able to invoke it.

Returns:

boolean isDirty

public void setModified(boolean flag)

          Sets the EJBean's modified flag.

Parameters:

flag - Modified Flag

public void ejbActivate()

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

public void ejbPassivate()

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

public void ejbLoad()

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

public void ejbStore()

          Sets the EJBean's modified flag to false. set to false to "reset" the variable for the next transaction.

public void ejbRemove() throws javax.ejb.RemoveException

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

Throws:

javax.ejb.RemoveException - if the EJBean does not allow removing the EJBean

public java.lang.String ejbCreate(java.lang.String accountId,
                        double initialBalance,
                        java.lang.String type) throws javax.ejb.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 EJBean and calls AccountBean.ejbCreate().

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

Parameters:

accountID - String Account ID

initialBalance - double Initial Balance

Throws:

javax.ejb.CreateException - if there is a problem creating the bean

public void ejbPostCreate(java.lang.String accountId,
                          double initialBalance,
                          java.lang.String type)

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

Parameters:

accountID - String Account Identification

initialBalance - double Initial Balance

type - String Account type

public double deposit(double amount)

          Adds amount to balance.

Parameters:

amount - double Amount

Returns:

double balance

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 java.lang.String accountType()

          Returns the account type.

Returns:

String account Type

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