Source code for dragonfly.engines.backend_natlink

# This file is part of Dragonfly.
# (c) Copyright 2007, 2008 by Christo Butcher
# Licensed under the LGPL.
#   Dragonfly is free software: you can redistribute it and/or modify it 
#   under the terms of the GNU Lesser General Public License as published 
#   by the Free Software Foundation, either version 3 of the License, or 
#   (at your option) any later version.
#   Dragonfly is distributed in the hope that it will be useful, but 
#   WITHOUT ANY WARRANTY; without even the implied warranty of 
#   Lesser General Public License for more details.
#   You should have received a copy of the GNU Lesser General Public 
#   License along with Dragonfly.  If not, see 
#   <>.

SR back-end package for DNS and Natlink


import logging
_log = logging.getLogger("engine.natlink")


# Module level singleton instance of this engine implementation.
_engine = None

[docs]def is_engine_available(): """ Check whether Natlink is available. """ global _engine if _engine: return True # Attempt to import natlink. try: import natlink except ImportError, e:"Failed to import natlink package: %s" % (e,)) return False except Exception, e: _log.exception("Exception during import of natlink package: %s" % (e,)) return False try: if natlink.isNatSpeakRunning(): return True else:"Natlink is available but NaturallySpeaking is not" " running.") return False except Exception, e: _log.exception("Exception during natlink.isNatSpeakRunning(): %s" % (e,)) return False
[docs]def get_engine(): """ Retrieve the Natlink back-end engine object. """ global _engine if not _engine: from .engine import NatlinkEngine _engine = NatlinkEngine() return _engine