Created by Jerry Wang, last modified on May 05, 2014
在debugger里观察trigger instance里的attribute MEDIUM类型:
![](https://img.laitimes.com/img/__Qf2AjLwojIjJCLyojI0JCLicmbw5SZmFjZ4MWM3YWN0czNlZDOlNWZ0UTNlZDM4ETNmFmYh9CX5d2bs92Yl1iclB3bsVmdlR2LcNWaw9CXt92Yu4GZjlGbh5yYjV3Lc9CX6MHc0RHaiojIsJye.png)
该Medium 初始化逻辑如下:
1. 从table PPFTTRIGG里读取相关记录:
2. 通过DB中的记录设置persistent class的attribute:
首先根据application class ID拿到class agent reference:
然后再通过application oid拿到对应的medium instance:
Persistent class的注册逻辑可以在agent class的class_constructor里找到: