Session Pool Design
1. 利用apache common-pool实现一个Session Pool（非常简单）
2. 如何避免代码中的returnObject()?
xxx()
invoke
-------- PoolProxy --- PoolInterceptor
SessionPool
borrowObject()
---------------
<---------------
xxx()
Session (be borr
owed)
--------------------------------
returnObject()
----------------
--
RMI design
xxx()
invoke
Serialize call to remote
----- ClientProxy --- RmiInterceptor -------------------
find ServerProxy, xxx()
xxx()
RmiServer---------------- ServerProxy ---....--ServerObject
Method Cache design
1.用HashMap做cache
xxx()
invoke
----- Proxy --- MCInterceptor
1. get Attribute @timeout
2. 用object[]作为key，看cache中的
结果是否超时
3. 如果超时
invoke
------------------ NextInterceptor...
4. 如果不超，返回被cache的结果
Draw activity UML diagram:
1. 实现绘图模块
xxx()
invoke
--- Proxy --- ActivityIntercpetor
draw xxx()
---------------绘图模块
invoke
---------------------------NextInterceptor...
Persistence and descriptive transaction
1. Persistence直接使用hibernate
xxx
invoke
----Proxy--HibernateInterceptor
1. 取得@tx，应该为required,requiresnew
,supports,notsupported中的一种
2. 判断当前的transaction状态
3. 决定本次调用是否在transaction当中
Folder-Node关系的复用
getFolder()
getFolder()
invoke
getFolder()
---UserProxy ------ NodeProxy --SideEntityInterceptor-- Node
return Folder
<-----
根据Folder创建Group proxy
返回GroupProxy
<----
in the code, like this:
...
User user = userFactory.find("guty"); //user is actually a proxy
Group group = (Group)((Node)user).getFolder();
