--- 目录结构规划
--- grape_tec
---  |-- biz（业务逻辑相关）
---  |-- task（Step-NC相关）
---  |-- event（Event相关）

--- 创建GrapeTec
CREATE CLASS IF NOT EXISTS grape_tec (
)with alias='GrapeTec', nickname='GrapeTec', key=manual, ttl=366 day, autosearch, version=true, namespace='grape';

--- step的基类
CREATE CLASS IF NOT EXISTS task: GrapeTec (
)with alias='Task', nickname='Task', version=true;

--- biz的基类
CREATE CLASS IF NOT EXISTS biz: GrapeTec (
)with alias='Biz', nickname='Biz', version=true;

--- event的基类
CREATE CLASS IF NOT EXISTS event: GrapeTec (
	client_timestamp			 			timestamp,
	server_timestamp			 			timestamp
)with alias='Event', nickname='Event', key=sequence, version=true;

create class Hello : GrapeTec (
    aaaa   @World
) ;

create class World : GrapeTec (
    bbbb   Hello
)