Hi Roy,

Thanks a lot for your prompt, complete and enthusiastic answer. We have lots of 
requirements to balance and this information is of great help.

When I was talking about implementing eBay I meant: if you had to implement 
something like eBay, would you use JBoss Portal? I ask that because we have 
many requirements similar to the features eBay is offering, and a huge number 
of hit per second. We are not getting any free PS2 games... I wonder if we 
should ask for them... :-)

Back to the point, I would like to ask a couple more questions. 

According to our design it would be neccesary to have the notion of page state 
and some portlets having their state in the page request. Their cache 
expiration time would be 0 and they would render each time the page renders 
getting this state from the request. This way we would be abe to implement some 
web behaviour in the traditional way. In fact we would be implementing a 
per-page MVC.

I find the portlet development model to be more close to a rich client 
application over http than a web site paradigm. This I am afraid, is not what 
is needed for the portal I am working on.
Let´s show the issue with an example:
Suppose I have a search page. In this search page I might have a portlet that 
shows a text box accepting keywords and a search button, and also a result list 
portlet on the same page beneath it. Now, let?s say the user inputs a keyword, 
presses the search button and obtains a list of results consisting of several 
pages. This mechanism involves IPC because the action is performed over the 
search portlet and the results list portlets needs to be re-rendered affected 
by the results found. The model behind the search portlet would contain the 
keywords and the model behind the results list portlet would have the keywords 
+ the results page number. Now the user selects page 2, the result list porlets 
receives an action and changes its model to page=2. During render this value is 
used to display the second page.

Now let?s suppose the user opens a new tab in Firefox, and issues a new search 
with different keywords. The new list of results also contains several pages. 
Afterwards the user switches back to the first tab and refreshes the page. My 
guess is that it will incorrectly show the first page of the second tab in the 
first tab.

Thanks again,

Regards,

Waldemar

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