Managed Beans and Containers Summary

References

http://stackoverflow.com/questions/11986847/java-ee-6-javax-annotation-managedbean-vs-javax-inject-named-vs-javax-faces

Overview

The various beans and their annotations are indeed quite confusing. Someone summarized in the above reference

Managed Beans:

• generally an object that its lifecycle managed by a container

• Java EE has many containers, each kind of independent (there's historical reason behind)

  • JSF

  • EJB

  • CDI

  • Servlet

  • etc.

JSF managed beans

• simply don't use

CDI beans

• can define scopes in javax.enterprise.context package

• @javax.inject.Named - for use with JSF

• to inject: @Inject

EJB

• differs with CDI in

  • transactional

  • remote / local

  • able to passivate stateful beans

  • able to make use of timers

  • can be asynchronous

• javax.inject.Named can be used on EJB

• as well as any Qualifiers can be used on EJB

Integration of CDI / EJB

• CDI / local EJB can be injected into each other