class MyClass(object):

    @cherrypy.expose
    @cherrypy.tools.json_out()
    def _expire_user_session(self, *args, **kwargs):
        import jaraco.mongodb.sessions

        session_cookie_name = cherrypy.serving.request.config.get('tools.sessions.name', 'session_id')

        if session_cookie_name in cherrypy.request.cookie:
            session_id = cherrypy.request.cookie[session_cookie_name].value
            database = cherrypy.serving.request.config.get('tools.sessions.database')
            _session = jaraco.mongodb.sessions.Session(session_id, database=database)
            # storage_path = cherrypy.serving.request.config.get('tools.sessions.storage_path')
            # _session = cherrypy.lib.sessions.FileSession(session_id, storage_path=storage_path)
            # _session.acquire_lock()
            cherrypy.lib.sessions.expire()
            _session.delete()
            # _session.release_lock()

        __json = {'url_path': '/'}
	return __json
    _expire_user_session._cp_config['tools.sessions.debug'] = True
    # _expire_user_session._cp_config['tools.sessions.timeout'] = -1 * 60 * 24 * 365