[Vtigercrm-developers] Resolved. Re: Problem after using setInterval in Calendar...

[Alan Lord]

Thanks to a bit of cluebat from Joe Bordes, I have managed to fix this...

In the renderEvents method of the Vtiger_Calendar_Js library, I had to 
add a further call to the Fullcalendar library to remove all sources 
from the feed prior to redrawing it., e.g.

Add this line:

>thisInstance.getCalendarViewContainer().fullCalendar('removeEventSources');

just above

> this.getCalendarViewContainer().fullCalendar('addEventSource',


HTH someone else.

Cheers

Al


On 25/05/2022 11:24, Alan Lord wrote:
> Consider this.
> 
> You have several users logged into their vtiger 7 system and they are 
> regular users of the Shared Calendar. One of my customers wanted the 
> calendar to "auto-refresh" so that if another user added an event (all 
> shared, public users), within a few seconds other users' calendars would 
> redraw and the new item would appear like magic!
> 
> So I added a refreshCalendarFeed method to the Calendar class that does 
> exactly this every 10 seconds. And it works quite nicely.
> 
>> refreshCalendarFeed : function() {
>>     var thisInstance = this;
>>     if(!thisInstance.intervalId) {
>>         thisInstance.intervalId = setInterval( () => 
>> thisInstance.renderEvents(), 10000);
>>     }
>> },
> 
> Most of the time...
> 
> But, if you have had your calendar view open for a few minutes or 
> longer, then click the next or previous month navigation buttons, for 
> some reason I cannot work out at all, the browser then sends duplicate 
> requests for EVERY previous refresh... Even though they are all the same 
> (batch mode feed request).
> 
> For example, say there had been 20 refreshes over the past few minutes 
> on your screen, then you want to look at next month. Click the button 
> and the code sends 20 POST requests asking for a batch feed of the 
> calendar all with the same parameters etc. This causes everything to 
> slow down - obviously - so the calendar doesn't reload for many seconds 
> as it is dealing with 20 simultaneous Ajax requests...
> 
> Has anyone got any ideas what's going on here?
> 
> Cheers
> 
> Al
> 
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