[Seaside] Asynchronous update from web server

[Paul DeBruicker]

Shouldn't your script have two < instead of one?  Like this:

scriptUpdaterOn: aJSScript
             	   aJSScript <<
                         ((aJSScript jQuery ajax
                          script: [ :s |
                                        self shouldUpdate ifTrue: [ self
scriptBannerUpdateOn: s ].
                     	   ]) timeout: 1 minute)




dtrussardi at tiscali.it wrote
> 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@

>  <

> dtrussardi@

> > escribió:
>> Ciao,
>> 
>>         thanks.
>> 
>> > El lun., 8 abr. 2019 a las 7:48, 

> dtrussardi@

>> > (<

> dtrussardi@

> >) 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 .squeakfoundation

>> > http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside
>> 
>> _______________________________________________
>> seaside mailing list
>> 

> seaside at .squeakfoundation

>> http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside
>> _______________________________________________
>> seaside mailing list
>> 

> seaside at .squeakfoundation

>> http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside
> 
> 
> _______________________________________________
> seaside mailing list

> seaside at .squeakfoundation

> http://lists.squeakfoundation.org/cgi-bin/mailman/listinfo/seaside





--
Sent from: http://forum.world.st/Seaside-General-f86180.html