topic Re: Stream Layer - I'm trying to access the raw meta data through the stream layer (via websockets & geoevent) in ArcGIS JavaScript Maps SDK Questions

Stream Layer - I'm trying to access the raw meta data through the stream layer (via websockets & geoevent)

MikeCrook — Fri, 17 Jul 2015 14:37:25 GMT

Javascript API

The stream layer is working as expected. I created an Info Template that displays a pop-up information window when the point was clicked on. So I can see the raw data fields inside the info template pop-up window. But I'm trying to access the raw data fields from within my javascript code. Can anyone provide a snippet of how this is done?

Re: Stream Layer - I'm trying to access the raw meta data through the stream layer (via websockets & geoevent)

MikeCrook — Mon, 24 Aug 2015 18:41:47 GMT

After much trying... I found that this data can be accessed through the stream layer "on" event by way of event return handler then using the graphics object of the stream layer. This took some work for being a newbie.

Re: Stream Layer - I'm trying to access the raw meta data through the stream layer (via websockets & geoevent)

BanchanaPandey — Thu, 18 Jan 2018 20:03:45 GMT

Hi Mike,

are you using the latest version of jsapi 4.6 for Stream Layer? I am trying to achieve something similar but the api doesn't have much documentation on stream layers events. i tried using stramLayer.on("message",function (){})) but it is not working. There are no events on graphics in the latest 4.6 documentated in the api site. Can you please share more details on how you accomplished this?

Thanks!

Re: Stream Layer - I'm trying to access the raw meta data through the stream layer (via websockets & geoevent)

MikeCrook — Thu, 18 Jan 2018 21:19:36 GMT

Not knowing exactly what you are trying to perform... My last successful attempt was on version 3.XX. I was able to access some of this information by using the InfoTemplate Object (now called PopTemplate but still works similar on 4.X) during the initialization of the StreamLayer object. This allowed me use the Stream Layer object's click event: streamLayerObj.on('click', function(evt){}); The 'evt' object within the function has an 'attributes' property that provides access to this information. For instance, 'evt.attributes.MyMetaData'. It should work in a similar fashion.Good luck!

Re: Stream Layer - I'm trying to access the raw meta data through the stream layer (via websockets & geoevent)

BanchanaPandey — Fri, 19 Jan 2018 21:27:49 GMT

I was talking about message event that used to be there for StreamLayer which is not in 4.6 now, to access the raw data as it is streaming in through a stream server

Re: Stream Layer - I'm trying to access the raw meta data through the stream layer (via websockets & geoevent)

BanchanaPandey — Sun, 11 Feb 2018 05:51:53 GMT

I found that is a bug on jsapi 4.6 version where on data received on streamlayer will not work. this has been confirmed as bug.