[cdi-dev] Clarify scopes and serialization

Antonio Goncalves antonio.goncalves at gmail.com
Sun Feb 1 07:36:20 EST 2015

Hi all,

I was reading the CDI 1.2 spec and couldn't clearly find the way
serialization and scopes work. The only explicit sentence I found was :

*1.3.1. JSF example*

*The @SessionScoped annotation defined in Section 2.4.1, “Built-in scope
types” is a scope*
*type that specifies the lifecycle of instances of Login. Managed beans
with this scope must be*

The Weld documentation is a bit more explicit :

*5.2. Built-in scopes*
*Managed beans with scope @SessionScoped or @ConversationScoped must be
serializable, since the container passivates the HTTP session from time to

And in the Java EE Tutorial we find (
http://docs.oracle.com/javaee/6/tutorial/doc/gjbbk.html) :

*Beans that use session, application, or conversation scope must be
serializable*, but beans that use request scope do not have to be

This even made be doubt about the application scope ?!?

Any way, could we clarify this in the CDI spec ?

Antonio Goncalves
Software architect, Java Champion and Pluralsight author

Web site <http://www.antoniogoncalves.org> | Twitter
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