Java EE 8 Design Patterns and Best Practices

Interceptors in the JEE platform

An Oracle tutorial defines an interceptor as follows:

"An interceptor is a class used to interpose in invocation methods or life cycle events that occur in an associated target class."

As previously mentioned, interceptors are generally used for technical tasks, referred to as cross-cutting tasks. This includes auditing, logging, controlling statistics, and so on. These tasks are separate from the business logic, and may be repeated over the entire application. Consequently, we can put the interceptor code into a separate class that is different from the target class that we want to intercept in order to improve code maintenance.

The concept of the interceptor was first introduced in JEE5, and it was only ...