def cacheLock(self):
        """
        This is a context manager to acquire a lock on the Lock file that will be used to
        prevent synchronous cache operations between workers.
        :yields: File descriptor for cache lock file in w mode
        """
        cacheLockFile = open(self.cacheLockFile, 'w')
        try:
            flock(cacheLockFile, LOCK_EX)
            logger.debug("CACHE: Obtained lock on file %s" % self.cacheLockFile)
            yield cacheLockFile
        except IOError:
            logger.critical('CACHE: Unable to acquire lock on %s' % self.cacheLockFile)
            raise
        finally:
            cacheLockFile.close()
            logger.debug("CACHE: Released lock")
This is a context manager to acquire a lock on the Lock file that will be used to
        prevent synchronous cache operations between workers.
        :yields: File descriptor for cache lock file in w mode