Interceptor work flow detail

  Need to understand the struts 2 Interceptor 's work flow detail. Solve the problem of:

1.extends or implements from which class?

2.which function it run first?

   Mark  study.

=====after read the blog before , You will learn more. 

http://struts2.group.iteye.com/group/wiki/1397-deep-into-struts2-interceptors

 

problem key:

1.extends AbstractInterceptor || MethodFilterInterceptor or inplements Interceptor

2. public abstract String intercept(ActionInvocation invocation)

 

 the param invoction = action invcation.