EJB 3 - Intermediate

Resources

• Write code that performs and ENC Loopup.
• Write code that makes proper use of DI.
• Be able to define DI either in the DD or per annotation(s).
• Identify the fact that DI can be performed on attributes or setter\getter.
• Be able to use DI in conjunction with inheritance.
• Identify the different types of resources and how to declare them both per annotation or in the DD.

Transactions

• Describe the difference between BTM and CTM and what actions are allowed to BTM or CTM beans and which actions are not allowed to them.
• Be able to define CTM Beans either per DD or per annotation.
• Identify the semantics of the six different transaction attributes:
  • MANDATORY
  • NEVER
  • NOT_SUPPORTED
  • REQUIRED
  • REQUIRES_NEW
  • SUPPORTS
• Use the methods of the EJBContext to influence CTM transactions.
• Identify restrictions on transaction attributes in conjunction with MDB.
• Identify restrictions on transaction attributes with SFSB that implements the interface SessionSynchronization. Write code that implements the interface SessionSynchronization.
• Write code that makes usage of the methods of the interface UserTransaction to write BTM code.
• Write code that makes usage of client-controlled transactions.
• Be able to recognize situations where it is better to use BTM over CTM.
• Identify what impact inheritance has on transaction attributes.
• Identify methods that run in a unspecified transactional context.

Security

• Define what is in the scope of EJB (Authorization) and what not (Authentication).
• Define roles either per annotation or in the DD.
• Define rules for accessing the methods of a bean either per annotation or in the DD.
• Write code that makes usage of programatic security.
• Identify the impact that inheritance has on security configurations.

Message Driven Beans

• Identify the differences between a Queue and a Topic.
• Write code that correctly declares a MDB.
• Identify the lifecycle of a MDB.
• Use the interface MessageDrivenContext.
• Configure correct activation-configurations for a MDB.
• Identify the differences between the acknowledge modes.
• Identify how the bean will acknowledge a message, depending on the transaction mode used.

Webservice Exposure

• Expose a SLSB as webservice.
• Determine what methods of a bean will be exposed.
• Write code that maps a bean-method to a wsdl method, given a portion of a wsdl file.
• Write code that calls methods of a webservice.

Exception Handling

• Identify the two different types of Exceptions and their impact on running transactions.
• Identify the steps involved with the occurrence of a specific exception.
• Be able to declare a ApplicationException per annotation or in the DD.
• Identify the impact of exceptions in Callback or Interceptor methods.
• Decide what exception will the client receive.

EJBContext

• Identify what methods of the interface EJBContext and its subinterface can be used at a certain point in the lifecycle of a bean.

Timer

• Create and start a timer.
• Define a legal timer method.
• Cancel a timer.
• Identify the impact that the rollback of a transaction has on the creation of a timer.
• Identify the fact that the with @Timeout annotated method runs in a unspecified security context.
• Recognize which Bean types can make use of timers.

Legacy Code

• Write code that makes a EJB3 Session Bean available to EJB 2.x Clients