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

[Alan Lord]

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