[Seaside] Asynchronous update from web server
dtrussardi at tiscali.it
dtrussardi at tiscali.it
Tue Apr 9 15:03:43 UTC 2019
Ciao,
> But using interval() is wrong. You're creating one new interval on every call! And it doesn't have to be recursive.
>
> Maybe instead of #setInterval: it is #interval: in your image.
You mean timeout:
But with:
scriptUpdaterOn: aJSScript
aJSScript <
((aJSScript jQuery ajax
script: [ :s |
self shouldUpdate ifTrue: [ self scriptBannerUpdateOn: s ].
]) timeout: 1 minute)
i don't have any updating.
With: scriptUpdaterOn: aJSScript
aJSScript <
((aJSScript jQuery ajax
script: [ :s |
self shouldUpdate ifTrue: [ self scriptBannerUpdateOn: s ].
self scriptUpdaterOn: s
]) timeout: 1 minute)
i have strange behavior.
The browser application go to 50% of CPU.
Thanks,
Dario
>
> Regards,
>
> El mar., 9 de abr. de 2019 11:30, dtrussardi at tiscali.it <dtrussardi at tiscali.it> escribió:
> Ciao,
>
> thanks.
>
> > El lun., 8 abr. 2019 a las 7:48, dtrussardi at tiscali.it
> > (<dtrussardi at tiscali.it>) escribió:
> >
> >> In my case i haven't any user actions on the client.
> >> The client display some data with dynamic banner ( marquee tag )
> >> and i need to update it only when the data to display change from the server.
> >> When the data on the server relative to an banner change i need to force the clients banners update.
> >> it seems to me that your initial solution may be fine.
> >>
> >> What do you think?
> >
> > Too complex for such a simple task.
> >
> > Is the <marquee> tag still a thing? I though it dissapeared when
> > Geocities closed. :)
> >
> > See below my suggestion.
> >
> >
> >> Another solution could be to manage an client ajax request with a specific interval
> >> but update the relative banner div only if the related data received from the server changed.
> >> ( But how i can manage it?
> >> Can i not reply to an client ajax request
> >> or respond to doing nothing and continue to view the current status )
> >
> > You can have a recursive call to setInterval() that returns a script
> > (javascript) that updates the mentioned banner, and if no update is
> > necessary you do nothing. Doing it once per minute is nothing for the
> > server, since it's a simple AJAX call, which if nothing needs
> > updating, is fast to answer.
> >
> > These are the key parts:
> >
> > renderContentOn: html
> > self renderBannerOn: html.
> > html script: (html jQuery script: [ :script | self scriptUpdaterOn: script ])
> >
> > scriptUpdaterOn: aJSScript
> > aJSScript <<
> > ((aJSScript jQuery ajax
> > script: [ :s |
> > self shouldUpdate ifTrue: [ self scriptBannerUpdateOn: s ].
> > self scriptUpdaterOn: s ]) setTimeout: 1 minute)
>
> The setTimeout is not implemented in my system.
>
> With timeout: i have some problematic.
>
> I change the scriptUpdaterOn: aJSScript to:
>
> scriptUpdaterOn: aJSScript
> aJSScript <
> ((aJSScript jQuery ajax
> script: [ :s |
> self shouldUpdate ifTrue: [ self scriptBannerUpdateOn: s ].
> ]) interval: 1 minute)
>
> It works very well relatively to my current needs.
>
> Dario
>
> >
> > scriptBannerUpdateOn: s
> > s << ((s jQuery id: 'banner') replaceWith: [ :h | self renderBannerOn: h ])
> >
> > Attached to this mails goes a working example of this.
> >
> > In #scriptBannerUpdateOn: I would put all the logic, even by replacing
> > the whole component as a whole (sometimes the best compromise) or
> > indidividual elements within it).
> >
> >
> >
> > Regards,
> >
> > Esteban A. Maringolo
> > <EAMRecursiveTimeout.st>_______________________________________________
> > seaside mailing list
> > seaside at lists.squeakfoundation.org
> > http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside
>
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