\documentclass[../thesis.tex]{subfiles}

\input{subfilepreamble}

\begin{document}
\input{subfileprefix}

%\chapter{\texorpdfstring{\Glsxtrshort{TOP} for the \glsxtrshort{IOT}}{TOP for the IoT}}%
\subfile{4iot}

%\chapter{The \texorpdfstring{\gls{MTASK}}{mTask} \texorpdfstring{\glsxtrshort{DSL}}{DSL}}%
\subfile{lang}

\chapter{Integration with \texorpdfstring{\gls{ITASK}}{iTask}}%
\label{chp:integration_with_itask}
\begin{chapterabstract}
	This chapter shows the integration of \gls{MTASK} with \gls{ITASK} by showing:
	\begin{itemize}
		\item an architectural overview of \gls{MTASK};
		\item on the interface for connecting devices;
		\item the interface for lifting \gls{MTASK} tasks to \gls{ITASK} tasks;
		\item and interface for lifting \gls{ITASK} \glspl{SDS} to \gls{MTASK} \glspl{SDS}.
	\end{itemize}
\end{chapterabstract}

The \gls{MTASK} language is a multi-view \gls{DSL}, i.e.\ there are multiple interpretations possible for a single \gls{MTASK} term.
Using the byte code compiler (\cleaninline{BCInterpret}) \gls{DSL} interpretation, \gls{MTASK} tasks can be fully integrated in \gls{ITASK}.
They are executed as if they are regular \gls{ITASK} tasks and they communicate may access \glspl{SDS} from \gls{ITASK} as well.
\Gls{MTASK} devices contain a domain-specific \gls{OS} (\gls{RTS}) and are little \gls{TOP} engines in their own respect, being able to execute tasks.
\Cref{fig:mtask_integration} shows the architectural layout of a typical \gls{IOT} system created with \gls{ITASK} and \gls{MTASK}.
The entire system is written as a single \gls{CLEAN} specification where multiple tasks are executed at the same time.
Tasks can access \glspl{SDS} according to many-to-many communication and multiple clients can work on the same task.
Devices are integrated into the system using the \cleaninline{withDevice} function (see \cref{sec:withdevice}).
Using \cleaninline{liftmTask}, \gls{MTASK} tasks are lifted to a device (see \cref{sec:liftmtask}).
\Gls{ITASK} \glspl{SDS} are lifted to the \gls{MTASK} device using \cleaninline{liftsds} (see \cref{sec:liftmtask}).

\begin{figure}[ht]
	\centering
	\includestandalone{mtask_integration}
	\caption{\Gls{MTASK}'s integration with \gls{ITASK}.}%
	\label{fig:mtask_integration}
\end{figure}

\section{Devices}\label{sec:withdevice}
When interpreted by the byte code compiler view, an \gls{MTASK} task produces a compiler.
This compiler is exceuted at run time so that the resulting byte code can be sent to an edge device.
All communication with this device happens through a so-called \emph{channels} \gls{SDS}.
The channels contain three fields, a queue of messages that are received, a queue of messages to send and a stop flag.
Every communication method that implements the \cleaninline{channelSync} class can provide the communication with an \gls{MTASK} device.
As of now, serial port communication, direct \gls{TCP} communication and \gls{MQTT} over \gls{TCP} are supported as communication providers.
The \cleaninline{withDevice} function transforms a communication provider and a task that does something with this device to an \gls{ITASK} task.
This task sets up the communication, exchanges specifications, handles errors and cleans up after closing.
\Cref{lst:mtask_device} shows the types and interface to connecting devices.

\begin{lstClean}[label={lst:mtask_device},caption={Device communication interface in \gls{MTASK}.}]
:: MTDevice //abstract
:: Channels :== ([MTMessageFro], [MTMessageTo], Bool)

class channelSync a :: a (Shared sds Channels) -> Task () | RWShared sds

withDevice :: (a (MTDevice -> Task b) -> Task b) | iTask b & channelSync, iTask a
\end{lstClean}

\section{Lifting tasks}\label{sec:liftmtask}
Once the connection with the device is established, \ldots
\begin{lstClean}
liftmTask :: (Main (BCInterpret (TaskValue u))) MTDevice -> Task u | iTask u
\end{lstClean}

\section{Lifting \texorpdfstring{\glsxtrlongpl{SDS}}{shared data sources}}\label{sec:liftsds}
\begin{lstClean}[label={lst:mtask_itasksds},caption={Lifted \gls{ITASK} \glspl{SDS} in \gls{MTASK}.}]
class liftsds v where
	liftsds :: ((v (Sds t)) -> In (Shared sds t) (Main (MTask v u)))
		-> Main (MTask v u) | RWShared sds
\end{lstClean}

\chapter{Implementation}%
\label{chp:implementation}
\begin{chapterabstract}
	This chapter shows the implementation of the \gls{MTASK} system.
	It is threefold: first it shows the implementation of the byte code compiler for \gls{MTASK}'s \gls{TOP} language, then is details of the implementation of \gls{MTASK}'s \gls{TOP} engine that executes the \gls{MTASK} tasks on the microcontroller, and finally it shows how the integration of \gls{MTASK} tasks and \glspl{SDS} is implemented both on the server and on the device.
\end{chapterabstract}
IFL19 paper, bytecode instructieset~\cref{chp:bytecode_instruction_set}

\section{Integration with \texorpdfstring{\gls{ITASK}}{iTask}}
IFL18 paper stukken

% Green computing
\subfile{green}

\input{subfilepostamble}
\end{document}
