MOOSE/Moose Development/Moose/Scheduler.lua
2016-06-05 00:03:27 +02:00

143 lines
4.4 KiB
Lua

--- Models time events calling event handing functions.
--
-- @{SCHEDULER} class
-- ===================
-- The @{SCHEDULER} class models time events calling given event handling functions.
--
-- SCHEDULER constructor
-- =====================
-- The SCHEDULER class is quite easy to use:
--
-- * @{#SCHEDULER.New}: Setup a new scheduler and start it with the specified parameters.
--
-- SCHEDULER timer methods
-- =======================
-- The SCHEDULER can be stopped and restarted with the following methods:
--
-- * @{#SCHEDULER.Start}: (Re-)Start the scheduler.
-- * @{#SCHEDULER.Start}: Stop the scheduler.
--
-- @module Scheduler
-- @author FlightControl
Include.File( "Routines" )
Include.File( "Base" )
--- The SCHEDULER class
-- @type SCHEDULER
-- @extends Base#BASE
SCHEDULER = {
ClassName = "SCHEDULER",
}
--- Constructor.
-- @param #SCHEDULER self
-- @param #table TimeEventObject Specified for which Moose object the timer is setup. If a value of nil is provided, a scheduler will be setup without an object reference.
-- @param #function TimeEventFunction The event function to be called when a timer event occurs. The event function needs to accept the parameters specified in TimeEventFunctionArguments.
-- @param #table TimeEventFunctionArguments Optional arguments that can be given as part of scheduler. The arguments need to be given as a table { param1, param 2, ... }.
-- @param #number StartSeconds Specifies the amount of seconds that will be waited before the scheduling is started, and the event function is called.
-- @param #number RepeatSecondsInterval Specifies the interval in seconds when the scheduler will call the event function.
-- @param #number RandomizationFactor Specifies a randomization factor between 0 and 1 to randomize the RepeatSecondsInterval.
-- @param #number StopSeconds Specifies the amount of seconds when the scheduler will be stopped.
-- @return #SCHEDULER self
function SCHEDULER:New( TimeEventObject, TimeEventFunction, TimeEventFunctionArguments, StartSeconds, RepeatSecondsInterval, RandomizationFactor, StopSeconds )
local self = BASE:Inherit( self, BASE:New() )
self:F2( { TimeEventObject, TimeEventFunction, TimeEventFunctionArguments, StartSeconds, RepeatSecondsInterval, RandomizationFactor, StopSeconds } )
self.TimeEventObject = TimeEventObject
self.TimeEventFunction = TimeEventFunction
self.TimeEventFunctionArguments = TimeEventFunctionArguments
self.StartSeconds = StartSeconds
if RepeatSecondsInterval then
self.RepeatSecondsInterval = RepeatSecondsInterval
else
self.RepeatSecondsInterval = 0
end
if RandomizationFactor then
self.RandomizationFactor = RandomizationFactor
else
self.RandomizationFactor = 0
end
if StopSeconds then
self.StopSeconds = StopSeconds
end
self.Repeat = false
self.StartTime = timer.getTime()
self:Start()
return self
end
--- (Re-)Starts the scheduler.
-- @param #SCHEDULER self
-- @return #SCHEDULER self
function SCHEDULER:Start()
self:F2( self.TimeEventObject )
self.Repeat = true
timer.scheduleFunction( self._Scheduler, self, timer.getTime() + self.StartSeconds + .01 )
return self
end
--- Stops the scheduler.
-- @param #SCHEDULER self
-- @return #SCHEDULER self
function SCHEDULER:Stop()
self:F2( self.TimeEventObject )
self.Repeat = false
return self
end
-- Private Functions
function SCHEDULER:_Scheduler()
self:F2( self.TimeEventFunctionArguments )
local ErrorHandler = function( errmsg )
env.info( "Error in SCHEDULER function:" .. errmsg )
env.info( debug.traceback() )
return errmsg
end
local Status, Result
if self.TimeEventObject then
Status, Result = xpcall( function() return self.TimeEventFunction( self.TimeEventObject, unpack( self.TimeEventFunctionArguments ) ) end, ErrorHandler )
else
Status, Result = xpcall( function() return self.TimeEventFunction( unpack( self.TimeEventFunctionArguments ) ) end, ErrorHandler )
end
self:T( { Status, Result } )
if Status and ( ( not Result ) or ( Result and Result ~= false ) ) then
if self.Repeat and ( not self.StopSeconds or ( self.StopSeconds and timer.getTime() <= self.StartTime + self.StopSeconds ) ) then
timer.scheduleFunction(
self._Scheduler,
self,
timer.getTime() + self.RepeatSecondsInterval + math.random( - ( self.RandomizationFactor * self.RepeatSecondsInterval / 2 ), ( self.RandomizationFactor * self.RepeatSecondsInterval / 2 ) ) + 0.01
)
end
end
end