topic Re: Geoprocessing with JS API 4.0 in ArcGIS JavaScript Maps SDK Questions

Geoprocessing with JS API 4.0

AbbyGallegos — Mon, 13 Jun 2016 16:08:13 GMT

I am having trouble figuring out how to call an asynchronous geoprocessing service with the new 4.0 API. I have looked at the example for calling the sychronous service, but I didn't see any examples for an asynchronous service. I understand that it requires using a "promise", which I am trying to learn to use, and it appears that I have to use "getResultImageLayer()" or "getResultImage()", but I don't understand what I would use for the parameters "resultName" and "imageParams". In the 3.x API, I had to use the URL for the MapServer of the asynchronous service along with the JobId, which would return the result as a layer. I guess I am just confused how this now works in the 4.0 API. I wish there was an example of using an asychronous service. Does anyone know of any examples?

Thanks,

Abby

Re: Geoprocessing with JS API 4.0

UndralBatsukh — Mon, 13 Jun 2016 18:46:14 GMT

Hi there,

As you have mentioned submiJob() returns an instance of promise and it takes 3 arguments:

'callback'- the function called when the promise is resolved

'errback', - the function called when the promise is rejected.

'progback' - the function called when the promise has progress.

Re: Geoprocessing with JS API 4.0

AbbyGallegos — Mon, 13 Jun 2016 21:13:25 GMT

Thanks Undral for the reply, but I am still a bit confused on how to call "getResultImageLayer" to display the result on the map. Also, I am getting an error that I don't understand when trying to create a new "ImageParameters()". See attached code.

Thanks for your help.

Abby

Re: Geoprocessing with JS API 4.0

UndralBatsukh — Tue, 14 Jun 2016 16:38:59 GMT

I deleted last message because I failed to understand your issue. I have not tried it myself but pass in null for the ImageParameters when calling getResultImageLayer. I will test it here shortly.

Re: Geoprocessing with JS API 4.0

AbbyGallegos — Tue, 14 Jun 2016 19:25:39 GMT

Undral, you stated that I should be able to access the results of my GP service from the result object. The output of the service that I am trying to access has a Data Type = GPRasterDataLayer. When I was using the 3.x API, I was able to just instantiate a new ArcGISDynamicMapServiceLayer with the MapService URL and the jobId appended to it, then add the layer to the map. It worked in 3.16 API.

However, I am now using the 4.0 API with 3D, and I do see the result object in the console.log(result), but I am confused as to how to add it to the map for display. The job succeeds and within the result object I see a "results" with "Viewer_Viewshed" (the data layer I am trying to display). However, I don't know how to add it to the map to display it in my 3D view. This is the code I am using:

function drawResult(result) {

console.log(result);

var gpMapServiceURL = gpMapUrl + "/" + result.jobId; // get the url to the MapService with the JobId

var resultImage = new MapImageLayer({

url: gpMapServiceURL

});

map.add(resultImage); // Not able to see the result on the map

}

I get no errors (using Firebug in firefox), but the result image does not show up on the map. By the way, it does work using 3.16 API.

I really appreciate your help. I would like to get this to work.

Thanks,

Abby

Re: Geoprocessing with JS API 4.0

UndralBatsukh — Tue, 14 Jun 2016 20:53:18 GMT

Hi there,

Please try this. I tested it and it works:

function drawResultData(result) {

console.log(result);

var resultLayer = gp.getResultImageLayer(result.jobId);

map.layers.add(resultLayer);

}

Re: Geoprocessing with JS API 4.0

AbbyGallegos — Wed, 15 Jun 2016 15:32:05 GMT

Awsome, thanks Undral, this works for what I needed.

I really appreciate your help!

Abby