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Faces Context null in serveResource Request

Mike Skit
Greenhorn

Joined: Feb 09, 2008
Posts: 23
Hi,
I am using jsf based jsr 286 portlets.
When invoking a ajax call to serveResource, i attempt to retrieve the Managed Bean using the FacesContext and get the following exception

"Config is null, please ensure that your init(config) method calls super.init(config) "

Can somebody point me to the solution to this ?

Thanks in advance.
Tim Holloway
Saloon Keeper

Joined: Jun 25, 2001
Posts: 16145
    
  21

You're short on details there, but the most common reason for a null Faces Context is when people attempt to reference it in JSPs and servlets.

The FacesContext does not exist as a long-term object. It is created and destroyed by the FacesServlet to handle the current http request/response process and ONLY the current http request/response process. The rest of the time it simply doesn't exist. And if you're making a non-JSF request, the FacesServlet doesn't process it, so it hasn't constructed the FacesContext.

However, you don't need the FacesContext to access managed beans. If a Managed Bean is in session or application scope, you can access it using the HttpSession.getAttribute method or the application-scope equivalent just like non-JSF attributes. There's nothing JSF-specific about how these objects are stored. Request scope objects would be the same way, except that request scope objects have such a short lifespan that they would have been destroyed before the non-JSF request was made.


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