[Seaside] Seaside Portlet [IDEA]

[Giovanni Giorgi]

Avi Bryant wrote:

>
> On Wednesday, October 29, 2003, at 10:18 AM, Giovanni Giorgi wrote:
>
>> In short Portlet are a sub-spec of Servlet, born to get "resuable 
>> portal components"  for aggregating data inside a web site, thinked 
>> as a portal.
>
>
> Can you summarize what makes "portlets" different from regular 
> "servlets"?


Portlet runs inside a Portal.
The Portal is defined as an content aggragator; the portal manage users 
and permissions, implementing also a
single sign on.
A User can register and log in via the portal.

Look at
    http://www.infinito.it
 You can see six box.
For instance, every one of this box can be thinked as a unique portlet.
Portlet generate only a html fragment, and the Server aggragete them in 
a big html document.
So the software house starts to provide portlets, which aggragate data.
The Customer designs its site aggregating portlets as she/he likes, 
defining pages and so on.
The Portal provide an easy admin console to add/remove/stack portlet.
Also, the portal provide a persistence storage for the portlet.


See also
    http://jakarta.apache.org/jetspeed/site/index.html
for a open portlet  engine. Try it with tomcat for getting an idea.

>
>>   1. Seaside can define an abstract PortletRenderer to be mapped as a
>>      render for HTML, WML and so on. 
>
> [ about multiple render output]
> Does anyone actually use WML anymore?  The trend I'm seeing is to have 
> full HTML browsers on handheld devices.  I'm skeptical that there's 
> much utility in supporting multiple markups (simple XHTML + CSS is the 
> way things are going to go, IMO).

I agree, but multi-rendering is a must. For instance, if you jave a 
handlheld device, you should generate slightly different pages.

>>      Sometimes I think the render: and call: method are the TRUE power
>>      of seaside....
>
>   2. We can  aggregate seaside components in a very simple way!
> I agree.  Although HTMLRenderer is pretty cool too ;).

Yes, the callback of the HTMLRenderer shines!! ;))

> We can start only defining a SeasidePortletComponent and starting form 
> here...do you like it? ;)
> Well, why don't you write an example portlet or two that we can look at?

Yes I should do it as soon as possible.
Ciao ciao!


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