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From Geoff Howard <coc...@leverageweb.com>
Subject Re: javax.servlet.http.HttpSession access from XSP?
Date Tue, 03 Feb 2004 14:40:26 GMT
Phil Blake wrote:
>> By the way, it's important that people know the basic reason Cocoon 
>> doesn't give you an HTTP session.  Cocoon abstracts the environment so 
>> that it can be run from many different environments, not just 
>> http/servlet.  Currently the command line interface is the only other 
>> implemented environment but even there dependency on servlet jar and 
>> HttpSession obviously makes no sense.  Examples of other potential 
>> environments which have been discussed are email (via James) and JMS.
>>
>> Now, that doesn't mean it should be impossible to get to the 
>> HttpSession if you are in that environment and that's what we need to 
>> see.  I think the method which is used in the other environment 
>> abstractions (Request for example) won't work here, but I don't see a 
>> reason cocoon's session couldn't implement HttpSession.  Right now, it 
>> seems the only methods unimplemented from the javax interface are the 
>> deprecated methods. Another alternative would be to use JDK 1.3 
>> dynamic proxy which may work if the code you pass the proxy to doesn't 
>> call the deprecated methods (I can't remember for sure if this is true).
> 
> 
> Good point Geoff.
> 
> This is a specialised case. I think you'd only want access to the 
> HttpSession for this kind of integration. Perhaps a _wrappedSession() 
> method on org.apache.cocoon.environment.Session is too easy to abuse. A 
> little opinionated documentation could help with that. :)
> 
> Any comments?

I was thinking more of just declaring that the cocoon HttpSession 
implements the javax interface as I mention above.  It would be easiest 
to implement the deprecated methods to just throw an exception.  Does 
Cayenne need them?  If we do this, you could just pass the cocoon 
session along with a possible cast depending on how you got it.

I've started a proposal on the dev list about this if you want to pipe 
in or follow along there.

Geoff


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