Re: [Springframework-developer] OpenSessionInView and portlet support

[J. E. R. <er...@di...>]

Hi,

A Portlet is not a Servlet, a set of portlets are invoked directly by 
the portlet-container in one client request.

The portlet spec says: "If the client request is triggered by an action 
URL, the portal/portlet-container must first trigger the action request 
by invoking the processAction method of the targeted portlet. The 
portal/portlet-container must wait until the action request finishes. 
Then, the portal/portlet-container must trigger the render request by 
invoking the render method for all the portlets in the portal page with 
the possible exception of portlets for which their content is being 
cached. The render requests may be executed sequentially or in parallel 
without any guaranteed order."

Note that 'the render request may be executed IN PARALLEL', as I 
understand it, each render request could be executed on different 
threads. I think this feature advises against the use of 
OpenSessionInViewFilter class with portlets.

>Well, if OpenSessionInViewFilter doesn't kick in for portlets, no other
>filter will kick in with portlets either. Isn't there maybe some general
>issue hiding there?
>
>Of course we can provide an OpenSessionInViewInterceptor for portlets, but
>I'm not sure whether that's actually a good fit there. The Portlet request
>flow with separate handle and render callbacks makes this less compelling.
>
>What we certainly can't do is let the existing OpenSessionInViewInterceptor
>implement some PortletControllerInterceptor interface. That would force
>every Servlet user to have the portlet.jar on the classpath.
>
>Juergen
>
>
>-----Original Message-----
>From: spr...@li...
>[mailto:spr...@li...]On Behalf
>Of Erwin Vervaet
>Sent: Tuesday, April 19, 2005 9:26 PM
>To: spr...@li...
>Subject: [Springframework-developer] OpenSessionInView and portlet
>support
>
>
>Apparently the existing OSIV filter does not work with portlets:
>
>http://forum.springframework.org/viewtopic.php?t=4907
>
>I guess we should tackle this issue when doing the Portlet support for 1.3.
>There is no PortletMVC category in JIRA so I'm not sure where to file it...
>Any input from the Porlet people?
>
>Erwin Vervaet
>erw...@er...
>
>
>
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-- 
J.Enrique Ruiz
Director de I+D+I - DiSiD S.L.L. (http://www.disid.com)
Tel +34 655 407 965
Email: er...@di...