How J2 consolidates a Page

[anyz <an...@gmail.com>]

Could someone confirms how J2 works to make a resultant PSML page. If i have
four portlets on a PSML page written in JSP. When this page is requrested
folowing flow of events will be executed:

1- J2 requests servlet engine Tomcat to compile and generate contents of
 each portlet separately. i.e. four requests sent for four portlet on page
2- The output of each portlet is then merged without any processing.e.g.
duplicate code is not removed if any exists.
3- Header and footer tempaltes are applied
4- Final output is sent to browser.

If above is correct we can say output generated by one portlet is not
visible/accessible to other. Each portlet should be be self suffiient to be
compiled and generate contents.
However header contribution is differnt thing and J2 wil not include a
duplicate header if multiple portlets are contriubuting it.

Thanks

Re: How J2 consolidates a Page

[David Taylor <da...@gmail.com>]

> If above is correct we can say output generated by one portlet is not
> visible/accessible to other

Yes, portlets cannot see or take part in the rendering of another
portlets content. However, portlets can communicate during the event
phase when using a Portlet 2.0 compliant container (like Jetspeed).
Thus one portlet can have some effect on the content of another
portlet. For example, the out of the box demo (2.2.1) has a page that
demonstrates two portlets communicating (an Address portlet and a
Google Maps portlet). You can see it by logging on as admin and going
here:

http://localhost:8080/jetspeed/ui/finance/map.psml


On Sun, May 8, 2011 at 10:48 PM, anyz <an...@gmail.com> wrote:
> Could someone confirms how J2 works to make a resultant PSML page. If i have
> four portlets on a PSML page written in JSP. When this page is requrested
> folowing flow of events will be executed:
>
> 1- J2 requests servlet engine Tomcat to compile and generate contents of
>  each portlet separately. i.e. four requests sent for four portlet on page
> 2- The output of each portlet is then merged without any processing.e.g.
> duplicate code is not removed if any exists.
> 3- Header and footer tempaltes are applied
> 4- Final output is sent to browser.
>
> If above is correct we can say output generated by one portlet is not
> visible/accessible to other. Each portlet should be be self suffiient to be
> compiled and generate contents.
> However header contribution is differnt thing and J2 wil not include a
> duplicate header if multiple portlets are contriubuting it.
>
> Thanks
>



-- 
David

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