August 2018
Intermediate to advanced
314 pages
8h 9m
English
Content preview from Java EE 8 Design Patterns and Best Practices
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Implementing the Session Façade pattern in JEE
In the JEE architecture, Session Façade is implemented by a stateless or stateful EJB. An EJB object can use or combine other POJOs, business objects, and EJBs. At this point, we must be careful not to accumulate too many unnecessary layers, as we run the risk of having a chain of EJBs where one EJB calls another more internal EJB, and so on. The services must be mapped and designed well.
Because the Session Façade is primarily implemented by EJBs, services such as transaction-control and security-management come naturally to this technology. It is in this layer that we usually have the transaction-control of most internal objects, such as the POJOs, which represent entities within the JPA technology. ...
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