topic dojo.deferred equivalent in ArcGIS API for Flex Questions

dojo.deferred equivalent

HaroldBostic — Thu, 29 Dec 2011 02:24:00 GMT

Hello, I feel like I'm missing something blatantly obvious, but does anybody know what the equivalent of a dojo deferred object is in FLEX. Basically, I have multiple different async calls and want to know when they are all complete so I can process their results collectively together.

Any ideas would be greatly appreciated

Re: dojo.deferred equivalent

RobertScheitlin__GISP — Thu, 29 Dec 2011 11:20:31 GMT

Harold,

The way I normally handle this is to have each returned async process set a unique boolean var and at the same time check if all the other boolean vars are true. If all are true then execute a final function. Someone out there may know of a better way though.

Re: dojo.deferred equivalent

AndyGup — Mon, 09 Jan 2012 18:40:51 GMT

To add to Robert's comments. I've also used a global ArrayCollection that keeps track of each request token. Then with each response I check the ArrayCollection to see if all the tokens have come back.

I've had a couple requests related how to do an asynchronous (tokenized) HTTP request in Flex, so here's a link to a blog post: http://blog.andygup.net/?p=460

-Andy
Esri Developer Network

Re: dojo.deferred equivalent

DanielSmith — Wed, 08 Aug 2012 15:54:29 GMT

Hello,

I am trying to auto-populate a couple area attributes after editing with the flex viewer (Acres and Sq Km). Since the areas need to be as accurate as possible i am projecting the geometry before sending it to the areasAndLengths() function.

The problem i am having is i do not seems to be able to wait for the second Async response from the areasAndLengths() function to complete. I set up both the project result handler and the areasAndLengths result handler to return a boolean value as recommended but my application times out when waiting for the areasAndLengths to complete.

I am calling the project function from the selection complete function as recommended in previous post here (http://forums.arcgis.com/threads/23497-EditTool-Autopopulate-Fields?highlight=autopopulate) and using the area and length code from the samples.

Any suggestions or code samples to test if both have functions have completed are greatly appreciated.

Considering an SOE or GP task but that seems to be overkill since these are both capabilities of the server in already.

Thank you very much for your time and any assistance, as always i am happy to promote any helpful answers .