Business Logic Layer 

The business logic layer of the Project Management and Employee Services application is implemented via session beans, which are part of the Enterprise JavaBeans 3.0 technology. You can find our guidance below:

·        Create only the interfaces that are really necessary. In most cases, the local interface fulfils the requirements and it is the recommended approach if all parts of your application run in the same Java Virtual Machine (JVM).

●      The EJB 3.0 specification introduces an important change in the way enterprise beans are accessed and called. You can replace the earlier service locator pattern that utilized Java Naming and Directory Interface (JNDI) lookups with the Dependency Injection pattern. Thus, the complexity around JNDI API usage is removed from the bean developer's and client’s viewpoint.