luup.task() question

Developer's Corner General Dev Discussions
1

I’ve got:


local taskHandle = -1
local TASK_ERROR = 2
local TASK_ERROR_PERM = -2
local TASK_SUCCESS = 4
local TASK_BUSY = 1

local MSG_CLASS = "Dummy"

local function task(text, mode)
      local mode = mode or TASK_ERROR

      if (mode == TASK_ERROR_PERM) then
          taskHandle = luup.task(text, TASK_ERROR, MSG_CLASS, taskHandle)
      else
          taskHandle = luup.task(text, mode, MSG_CLASS, taskHandle)

          if (mode ~= TASK_SUCCESS) then
            luup.call_delay("clearTask", 30, "", false)
          end
      end
end

function clearTask()
    luup.task("Clear", TASK_SUCCESS)
end

task("Clear", TASK_SUCCESS)

And the result in the LuaUPnP.log file is:

01	03/10/13 15:20:23.100	LuaInterface::CallFunction_Timer-5 function clearTask failed attempt to call a nil value

I’m obviously missing something, but am not sure what?

2

I’m not certain, but do you need to define the function clearTask before the call_delay that references it?

3

Yeah, sorry. Cut & paste error in the post. How it’s defined in the actual .lua file:

local taskHandle = -1
local TASK_ERROR = 2
local TASK_ERROR_PERM = -2
local TASK_SUCCESS = 4
local TASK_BUSY = 1

local MSG_CLASS = "Dummy"

function clearTask()
        dbg.log("Clearing the task panel in UI5", dbg.DEBUG_VERBOSE)
        luup.task("Clear", TASK_SUCCESS)
end

local function task(text, mode)
      local mode = mode or TASK_ERROR

      if (mode == TASK_ERROR_PERM) then
          taskHandle = luup.task(text, TASK_ERROR, MSG_CLASS, taskHandle)
      else
          taskHandle = luup.task(text, mode, MSG_CLASS, taskHandle)

          if (mode ~= TASK_SUCCESS) then
            luup.call_delay("clearTask", 30, "", false)
          end
      end
end
4

… that code looks familiar :wink:

It’ll only work in a [tt].xml[/tt] file. It won’t work in a [tt].lua[/tt] since [tt]luup.call_delay[/tt] can’t see those func defns.

5

[quote=“guessed, post:4, topic:174586”]… that code looks familiar :wink:

It’ll only work in a [tt].xml[/tt] file. It won’t work in a [tt].lua[/tt] since [tt]luup.call_delay[/tt] can’t see those func defns.[/quote]

Ah, I see.

(And yes, I stole it from the Weather Underground plugin (attributed “borrow”, but still a “borrow”). If it ain’t broke… :wink: