Package ejava.examples.ejbsessionbank.ejb

Class TellerEJB

java.lang.Object

ejava.examples.ejbsessionbank.ejb.TellerEJB

All Implemented Interfaces:

Teller, TellerLocal, TellerRemote

public class TellerEJB
extends Object
implements TellerLocal, TellerRemote

This class implements a Stateless Session Bean wrapper around the Teller business logic. With the light-weight EJB3 design for session beans, there is no reason why the TellerImpl couldn't be the session bean and we could possibly do so through the deployment descriptor. However, adding this specific class permits a clear separation between implementing the business logic and handling RMI, transactions, and security (coming) issues that are part of being a session bean.

Field Summary

Fields

Modifier and Type	Field	Description
protected SessionContext	ctx
protected String	daoClassName
protected EntityManager	em	The peristence context will be defined as a property to allow a derived class to override this value and assist in unit testing.
private static org.slf4j.Logger	log
private StatsLocal	stats
protected Teller	teller

Constructor Summary

Constructors

Constructor	Description
TellerEJB()

Method Summary

Modifier and Type	Method	Description
Owner	addOwner(long ownerId, String accountNumber)
void	close()	This method will perform one-time cleanup for the object.
Account	closeAccount(String acctNum)
Account	createAccount(String accountNumber)
Owner	createOwner(String firstName, String lastName, String ssn)
private void	debug()
Account	getAccount(String acctNum)
List<Account>	getAccounts(int index, int count)
Ledger	getLedger()
Ledger	getLedger2()	This method takes advantage of the DAO/Business logic knowledge of how to create a DTO.
double	getLedgerAveBalance()	This method is and example of a method that may be too fine for a remote method and should be encapsulated in a remote facade call.
long	getLedgerCount()	This method is and example of a method that may be too fine for a remote method and should be encapsulated in a remote facade call.
double	getLedgerSum()	This method is and example of a method that may be too fine for a remote method and should be encapsulated in a remote facade call.
List<Account>	getOverdrawnAccounts(int index, int count)
List<Owner>	getOwners(int index, int count)
List<OwnerDTO>	getOwnersDTO(int index, int count)
List<Owner>	getOwnersLoaded(int index, int count)
List<Owner>	getOwnersPOJO(int index, int count)
void	init()	This method performs one-time initialization for the session bean.
Owner	openAccount(long ownerId, String accountNumber)
void	removeOwner(long ownerId)
void	updateAccount(Account account)
String	whoAmI()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

log

private static final org.slf4j.Logger log

ctx

protected SessionContext ctx

em

protected EntityManager em

The peristence context will be defined as a property to allow a derived class to override this value and assist in unit testing.

daoClassName

protected String daoClassName

stats

private StatsLocal stats

teller

protected Teller teller

Constructor Detail

TellerEJB

public TellerEJB()

Method Detail

init

@PostConstruct
public void init()

This method performs one-time initialization for the session bean. The name of the DAO class is provided through a JNDI ENC property value.

close

@PreDestroy
public void close()

This method will perform one-time cleanup for the object. There is really nothing that needs to be done at this time. The operations supplied demo some types of cleanup that could be done.

createAccount

public Account createAccount(String accountNumber)
                      throws BankException

Specified by:

createAccount in interface Teller

Throws:

BankException

closeAccount

public Account closeAccount(String acctNum)
                     throws BankException

Specified by:

closeAccount in interface Teller

Throws:

BankException

getAccount

public Account getAccount(String acctNum)
                   throws BankException

Specified by:

getAccount in interface Teller

Throws:

BankException

getOverdrawnAccounts

public List<Account> getOverdrawnAccounts(int index,
                                          int count)
                                   throws BankException

Specified by:

getOverdrawnAccounts in interface Teller

Throws:

BankException

getAccounts

public List<Account> getAccounts(int index,
                                 int count)
                          throws BankException

Specified by:

getAccounts in interface Teller

Throws:

BankException

updateAccount

public void updateAccount(Account account)
                   throws BankException

Specified by:

updateAccount in interface Teller

Throws:

BankException

getLedger

public Ledger getLedger()
                 throws BankException

Specified by:

getLedger in interface Teller

Throws:

BankException

getLedger2

public Ledger getLedger2()
                  throws BankException

This method takes advantage of the DAO/Business logic knowledge of how to create a DTO. Note that the query is not actually known to the business logic or DAO. It is expressed in an ORM.xml file.

Specified by:

getLedger2 in interface TellerRemote

Throws:

BankException

getLedgerAveBalance

public double getLedgerAveBalance()
                           throws BankException

This method is and example of a method that may be too fine for a remote method and should be encapsulated in a remote facade call.

Specified by:

getLedgerAveBalance in interface Teller

Throws:

BankException

getLedgerCount

public long getLedgerCount()
                    throws BankException

This method is and example of a method that may be too fine for a remote method and should be encapsulated in a remote facade call.

Specified by:

getLedgerCount in interface Teller

Throws:

BankException

getLedgerSum

public double getLedgerSum()
                    throws BankException

This method is and example of a method that may be too fine for a remote method and should be encapsulated in a remote facade call.

Specified by:

getLedgerSum in interface Teller

Throws:

BankException

debug

private void debug()

addOwner

public Owner addOwner(long ownerId,
                      String accountNumber)
               throws BankException

Specified by:

addOwner in interface Teller

Throws:

BankException

createOwner

public Owner createOwner(String firstName,
                         String lastName,
                         String ssn)
                  throws BankException

Specified by:

createOwner in interface Teller

Throws:

BankException

openAccount

public Owner openAccount(long ownerId,
                         String accountNumber)
                  throws BankException

Specified by:

openAccount in interface Teller

Throws:

BankException

removeOwner

public void removeOwner(long ownerId)
                 throws BankException

Specified by:

removeOwner in interface Teller

Throws:

BankException

getOwners

public List<Owner> getOwners(int index,
                             int count)
                      throws BankException

Specified by:

getOwners in interface Teller

Throws:

BankException

getOwnersLoaded

public List<Owner> getOwnersLoaded(int index,
                                   int count)
                            throws BankException

Specified by:

getOwnersLoaded in interface TellerRemote

Throws:

BankException

getOwnersPOJO

public List<Owner> getOwnersPOJO(int index,
                                 int count)
                          throws BankException

Specified by:

getOwnersPOJO in interface TellerRemote

Throws:

BankException

getOwnersDTO

public List<OwnerDTO> getOwnersDTO(int index,
                                   int count)
                            throws BankException

Specified by:

getOwnersDTO in interface TellerRemote

Throws:

BankException

whoAmI

public String whoAmI()

Specified by:

whoAmI in interface TellerRemote