[aida] Comet pattern explained on our website

[Janko Mivšek]

Rob Rothwell pravi:
> Hah!
> 
> I think your initial
> 
> liveContent updateEverySeconds: 3600.
> 
> should be a very SHORT update:
> 
> liveContent updateEverySeconds: 1.

Yes, you are right! Bad me, how come I didn't thing that way! Well I
actually did that way in original code, just somehow felt it is wrong...

I already updated the webpage. Sorry guys!

Janko

> 
> Then you put the long delay in the waitForAnyChange method, just like
> you did.
> 
> The "outer" Ajax short update will never fire until after you fall
> through the waitForAnyChange method, which will only happen after
> receiving an announcement or the count is reached.
> 
> I don't know why I never got that right before...
> 
> Rob
> 
> 
> On Tue, Mar 3, 2009 at 1:26 PM, Rob Rothwell <r.j.rothwell na gmail.com
> <mailto:r.j.rothwell na gmail.com>> wrote:
> 
>     Maybe this is a question I should have asked long ago.
> 
>     What are the benefits of just checking for an update every now and
>     then with plain old Ajax, versus waiting for something to happen?
> 
>     Would I be better off just polling for changes every few seconds?
> 
>     Thanks,
> 
>     Rob
> 
> 
>     On Tue, Mar 3, 2009 at 8:54 AM, Janko Mivšek
>     <janko.mivsek na eranova.si <mailto:janko.mivsek na eranova.si>> wrote:
> 
>         Dear all,
> 
>         I open a special page for Comet pattern on our website:
> 
>                http://www.aidaweb.si/comet.html
> 
>         There you'll find a description of Comet and how it is supported
>         in Aida
>         as a pattern, because there is no special additional code for
>         Comet in
>         Aida, you are just using usual periodic updater, set to say 1h, but
>         server delays the answer to this Ajax request until some interesting
>         event happen to be worth refreshing the page.
> 
>         There is also an example how to implement the Comet pattern
>         using the
>         Announcement event framework, which is preferable way to go.
> 
>         Best regards
>         Janko