Skip to Main Content
Developing Middleware in Java EE 8
book

Developing Middleware in Java EE 8

by Abdalla Mahmoud
June 2018
Intermediate to advanced content levelIntermediate to advanced
252 pages
6h 45m
English
Packt Publishing
Content preview from Developing Middleware in Java EE 8

Using events

Events, as you may know, are runtime incidents that you do care about. CDI provides a loosely coupled model, following the observer design pattern, which allows you to fire an event from a CDI bean, and handling the event from one or more other CDI beans. The key advantages of the CDI events model are:

  • Event producers and observers are decoupled from each other
  • Observers can define selectors to limit the set of events they consume
  • Observers are aware of database transactions and can consume events according to transaction states

In our booking application, we are going to use events in order to notify end users by email with either the success or failure of their booking operations, without tightly coupling the mailing code ...

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

Mastering Java EE Development with WildFly

Mastering Java EE Development with WildFly

Luca Stancapiano

Publisher Resources

ISBN: 9781788391078Supplemental Content