JSF and EE6 managed beans and scopes
27 Dec 2015
A quick cheat sheet:
| Scope | JSF | CDI | Notes |
|---|---|---|---|
| Request | yes | yes | Ends after response. |
| View | yes | no | Ends when user navigates “away”. |
| Session | yes | yes | Available until session timeout or invalidation. |
| Application | yes | yes | Available until web application is stopped. |
| Conversation | no | yes | Controlled by conversation.begin() and conversation.end(). |
JSF @ManagedBean - in javax.faces.bean
EE6 @ManagedBean - in javax.annotation (not part of JSF)
CDI beans use @Named in javax.inject for injection. JSF supports rudimentary injection using @ManagedProperty - may be sufficient for your needs, though!
CDI scopes are in javax.enterprise.context
Ajax works well with view-scoped beans (JSF only), but not with request-scoped beans - because the scope does not persist beyond the response phase.