def execute( self, keepGoing, threadNumber ):
if threadNumber == -1:
try:
threadNumber = multiprocessing.cpu_count() + 1
except NotImplementedError:
threadNumber = 2
Log.verbose( "Automatically using", threadNumber, "jobs" )
self.__prepareExecution()
self.__executeInThreads( keepGoing, threadNumber )
self.__checkExecution()
