topic GeometryServiceEvent token not accessible in ArcGIS API for Flex Questions

GeometryServiceEvent token not accessible

JorgeFiallega — Fri, 30 Nov 2012 17:37:58 GMT

The GeometryService when calling the buffer() method it returns back an AsyncToken
Nevertheless I dont find a way to access the token from the GeomtryServiceEvent.

This is all doable with the HTTPService and the ResultEvent.
The problem is that the token property comes from the AbstractToken which ResultEvent inherits from but the GeometryServiceEvent does not.

So

1. what is the purpose of returning hte AysncToken if it is not accessible from the event later
2. How do I pass values to handler of GeometryServiceEvent.BUFFER_COMPLETE ?

Re: GeometryServiceEvent token not accessible

JorgeFiallega — Sun, 12 Dec 2021 01:45:19 GMT

I did the following:

geometryService.addEventListener(GeometryServiceEvent.BUFFER_COMPLETE, getCircleBufferCompleteHandler);
var token:AsyncToken = geometryService.buffer(bufferParameters)
token.addResponder(new AsyncResponder(myResultFunction1,myFaultFunction1,{greeting:'hello'}));

public function myResultFunction1(result:Object, token:Object = null):void{
  Alert.show(token.greeting);
}
public function myFaultFunction1(error:Object, token:Object = null):void{
  Alert.show('myFaulttFunction1');
}
private function getCircleBufferCompleteHandler(event:GeometryServiceEvent):void{
  Alert.show('getCircleBufferCompleteHandler');
}

but I am not sure this is a very good solution because two handlers are called, in the case of success myResultFunction1, getCircleBufferCompleteHandler. So I basically have to create a dummy getCircleBufferCompleteHandler which will do nothing. That tells me that I am going the wrong way.
I tried

geometryService.addEventListener(GeometryServiceEvent.BUFFER_COMPLETE, null);

to avoid one of the handlers but I get an error that second param can not be null.

So, I am not very happy about my solution. If somebody can shine some light, it will be appreciate it.

Re: GeometryServiceEvent token not accessible

RobertScheitlin__GISP — Fri, 30 Nov 2012 19:29:48 GMT

Jorge,

See if this helps:

            private function buffer(event:Event):void{                 geometryService = new GeometryService("http://tasks.arcgisonline.com/ArcGIS/rest/services/Geometry/GeometryServer");                 bufferParameters = new BufferParameters();                 bufferParameters.bufferSpatialReference = new SpatialReference(102100);                 bufferParameters.distances = [1];                 bufferParameters.unit = GeometryService[GeometryService.UNIT_SQUARE_MILES];                 var mp:MapPoint = new MapPoint(3269676, 9132652, new SpatialReference(102100));                 bufferParameters.geometries = [mp];                 var token:AsyncToken = geometryService.buffer(bufferParameters)                 token.addResponder(new AsyncResponder(myResultFunction1,myFaultFunction1,{greeting:'hello'}));             }                          public function myResultFunction1(result:Array, token:Object = null):void{                 //The result should be an array of polygon(s)                 Alert.show(token.greeting);                 var pPoly:Polygon = result[0];                 trace(pPoly.toString());             }             public function myFaultFunction1(error:Object, token:Object = null):void{                 Alert.show('myFaulttFunction1');             }

Don't forget to click the Mark as answer check on this post and to click the top arrow (promote).
Follow these steps as shown in the below graphic:

Re: GeometryServiceEvent token not accessible

JorgeFiallega — Mon, 03 Dec 2012 14:21:23 GMT

Thanks a lot.

Re: GeometryServiceEvent token not accessible

RobertScheitlin__GISP — Mon, 03 Dec 2012 14:49:31 GMT

Jorge,

Don't mis the more important step... Making the question as answered. Step 1 in the graphic on my last post.

Re: GeometryServiceEvent token not accessible

JorgeFiallega — Mon, 03 Dec 2012 15:03:10 GMT

that is the first thing I did. Does not show up for you ?

Re: GeometryServiceEvent token not accessible

RobertScheitlin__GISP — Mon, 03 Dec 2012 15:05:16 GMT

Jorge,

No the only thing that I see that you have done is step 2 (promoting the post). Step 1 is clicking the check mark.