def aot_rpush(self, exit_code):
        """Push message to AOT action channel."""
        if self.tcex.default_args.tc_playbook_db_type == 'Redis':
            try:
                self.db.rpush(self.tcex.default_args.tc_exit_channel, exit_code)
            except Exception as e:
                self.tcex.exit(1, 'Exception during AOT exit push ({}).'.format(e))
Push message to AOT action channel.