[Seaside] Problems with my dishwasher.. I mean.. Comet

[Lukas Renggli]

> You're suggesting long polling (correct term?) with periodic ajax requests?

No. I suggest that you use Comet only as a mean to push simple events.
Interested sessions can then decide themselves if they want to
retrieve more information and update their view.

Similar to what Twitter and Yammer do to update their messages.

Lukas


>
> RS
>
>> From: renggli at gmail.com
>> Date: Thu, 1 Apr 2010 23:46:13 +0200
>> Subject: Re: [Seaside] Problems with my dishwasher.. I mean.. Comet
>> To: seaside at lists.squeakfoundation.org
>>
>> > The first is, how do the pushers work? I tried throwing references to
>> > one
>> > around to just one, but I think it actually needs to be rendered to the
>> > page
>> > (load script) as per the example.
>>
>> Pushers send Javascript code to all connected clients.
>>
>> > And the last one for now ;) is how can I restrict relevent data to the
>> > sessions that "care" about it?
>> > If a client pushes some javascript, but only
>> > a few other clients need that javascript, I would prefer to only give
>> > that
>> > script to those clients, or am I thinking on the wrong lines here?
>>
>> Currently there is no support for filtering or sending messages to
>> particular sessions only, although that would be technically easily
>> possible. We need to improve the Comet package to be able to do that.
>>
>> For now your application could provide multiple pushers and sessions
>> register to the one they are interested in.
>>
>> > Should I do something more along the lines of the CTCounter example
>> > where,
>> > when something in the data structure changes, then the clients can
>> > choose to
>> > do something about it?
>>
>> Personally I suggest (although the demo examples don't do this) that
>> you use Comet only to notify about changes, not to transport large
>> amounts of data. Like this the clients can decide themselves what they
>> want to do and request the actual update from the server if they need
>> it.
>>
>> Lukas
>>
>> --
>> Lukas Renggli
>> www.lukas-renggli.ch
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>> seaside at lists.squeakfoundation.org
>> http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside
>
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-- 
Lukas Renggli
www.lukas-renggli.ch