def get_next_id(self):
        try:
            query = {'_id': 'last_id'}
            update = {'$inc': {'id': 1}}
            fn = self.db.internal.find_and_modify
            row = fn(query, update, upsert=True, new=True)
        except Exception as e:
            raise DatabaseException(e)
        return row['id']
def __init__(self):
        self.stdin_path = '/dev/null'
        self.stdout_path = settings.LOG_PATH + '/webapp.log'
        self.stderr_path = settings.LOG_PATH + '/webapp.log'
        self.pidfile_path = settings.PID_PATH + '/webapp.pid'
        self.pidfile_timeout = 5