Back-end side wrapping

1. The first step is to build a robust script to launch your code on the calculation server running Promethee daemon.
   This script will be called by Promethee daemon when any authorized Promethee front-end will ask for a calculation with this code.
   The script may hold these features:
   • environment variables setting needed for code running,
   • pre-processing of running directory, for instance create directory, move files insides, apply dos2unix command on input files,
   • emulation of graphical display and interaction (using Xvfb and xdotool)
   • post-processing of code output for easier parsing by Promethee (grep, awk, sed),
   • cleaning of directory after calculation is done to suppress big files,
   • support for efficient kill running calculation (in case the connected front-end ask for):
     • if your script creates a PID file, all integers written inside will be used as arguments for taskkill or kill -9 commands,
     • if your script creates a KILL.bat or KILL.sh file, it will be launched.
2. [optional] create a .cplugin.jar back-end plugin to better support progress report or interaction,
3. Once this script and “cplugin” is available and tested, you have to modify the Promethee daemon configuration in the calculator.xml file holding the list of codes and back-end, so it may look like this:

   <?xml version="1.0" encoding="UTF-8" standalone="no"?> 
   <CALCULATOR spool="/tmp" >
        ...
        <CODE command="mycodescript.bat" name="MyCode" cplugin="file:MyCodePlugin.cplugin.jar" />
        ...
   </CALCULATOR>