Roku Developer Program

[chaklasiyanikun]

I make one sample App for Roku. It is as below.

MainScene.brs

sub init()
    m.TaskNodeThread = CreateObject("roSGNode", "TaskNodeThread")
    m.TaskNodeThread.control = "RUN"
end sub

MainScene.xml

<?xml version="1.0" encoding="UTF-8"?>
<component name="MainScene" extends="Scene" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="https://devtools.web.roku.com/schema/RokuSceneGraph.xsd">
     <script type="text/brightscript" uri="pkg:/components/MainScene.brs" />
</component>

TaskNodeThread.brs

sub init()
     m.TestContent = testContentFunction(testData)
end sub

function testContentFunction(testData as String) as String

     'Here I need some calculation and It takes a lot of time.
     'It takes around 50 to 60 Sec and I got this error in this function. 
     'I know Rendered thread timeout limit is 10 Sec that's why I have written this 
      function in Task Node. 
     'Even so, it waits only for 10 Sec.
     'Can anyone suggest where should I write this type of logic in Roku which is not 
      affected by UI.

end function

TaskNodeThread.xml

<?xml version="1.0" encoding="UTF-8"?>
<component name="TaskNodeThread" extends="Task" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="https://devtools.web.roku.com/schema/RokuSceneGraph.xsd">
     <script type="text/brightscript" uri="pkg:/components/TaskNodeThread.brs" />
</component>

[necrotek · Accepted solution]

Review the documentation on correctly setting up a task

https://developer.roku.com/docs/references/scenegraph/control-nodes/task.md

the way you have set this up 'testContentFunction(testData)' will run when created

MainScene.brs set testdata for task here before "run"

sub init()
    m.TaskNodeThread = CreateObject("roSGNode", "TaskNodeThread")
    m.TaskNodeThread.TestContent=testData 
    m.TaskNodeThread.observefield("resultContent","onResultContentChanged") 'observe field to see if we are done with task 
    m.TaskNodeThread.control = "RUN" 
end sub

sub onResultContentChanged(event) 'called when task completes
   data=event.getdata()
   'do stuff with data here
end sub

TaskNodeThread.xml needs and interface for test content

<?xml version="1.0" encoding="UTF-8"?>
<component name="TaskNodeThread" extends="Task" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="https://devtools.web.roku.com/schema/RokuSceneGraph.xsd">
 <interface> 
    <field id = "resultcontent" type = "node" />
    <field id = "testcontent" type = "node" />
  </interface>
<script type="text/brightscript" uri="pkg:/components/TaskNodeThread.brs" /> </component>

TaskNodeThread.brs m.top.functionName is what is called when .control="run" is set

sub init()
     m.top.functionName = "testContentFunction"
end sub

function testContentFunction() as String
    testdata=m.top.testcontent
    'do stuff here
    m.top.resultContent = resultOfStuffDone 'signal task has completed
end function 

[chaklasiyanikun]

Thank you so much for your response. That's what I was looking for.
I read this documentation for stopping the Task node. Is there any way or field available for the Stopping the Task Thread between the Logic?

like

m.TaskNodeThread.control = "STOP"

And

I take the type array in the field and use it like below. But it gives this error => Interface is not a member of BrightScript Component (runtime error &hf3). Is it the correct way I used it?

TaskNodeThread.xml

<field id = "resultcontent" type = "node" />

TaskNodeThread.brs

function testContentFunction() as String

     testdata=m.top.testcontent
     'do stuff here

      for val = 0 to Value - 1
          m.top.resultContent.Push(Value[val])
      end for

   return ""

end function

The single value, I am able to fetch using event. But, I need to fill this whole value in an array.
Using Global value I am able to do
But, only assocaaray available in Global Node.

So, I need to convert array to assocarray in Task Thread and Render thread I again convert to assocarray to array and used. This is right approch or you suggest me to any better approch?

The single value, I am able to fetch using event. But, I need to fill this whole value in an array.

Using Global value I am able to do

But, only assocaaray available in Global Node. So I convert to array to assocarray in Task Thread and Render thread I again convert to assocarray to array and used. This is right approch or you suggest me to any better approch.

 m.global.addfield("resultContentResponse","assocarray", TRUE)

TaskNodeThread

contentArr = CreateObject("roArray",Value.Count(),false)
for val = 0 to Value - 1 
     contentArr.Push(Value[val]) 
end for
assocArrayContent = formatJSON(contentArr)
m.Global.resultContentResponse = assocArrayContent

MainScene

response = ParseJson(m.Global.resultContentResponse)
'do stuff here 
For Each res In response
     Print "My Response here: " + res 
End For

[necrotek]

Sure... you should be able to m.TaskNodeThread.control = "STOP" at some point in your mainscene after the task has been started.

if you need to return an array change the type to array. same with test content if you want to pass as a different type such as "string".

<field id = "resultcontent" type = "array" />
<field id = "testcontent" type = "string" />

if you do this like below, then it will trigger the onResultContentChanged() in the mainscene each time you push to the array since this is what is being observed.

     for val = 0 to Value - 1
          m.top.resultContent.Push(Value[val])
      end for

 Do something like this instead

      resultContent=[]
     for val = 0 to Value.count() - 1 
          resultContent.Push(Value[val])
      end for
m.top.resultContent.append(resultContent) 'only trigger once you are done 

I don't think you want to store this in the GlobalAA node to pass the data

from mainscene you can access the result 

response = m.TaskNodeThread.resultContent

[chaklasiyanikun]

Thank you so much for sharing this information!...