Building your own Interceptor
File Upload Interceptor2007/04/02 23:16
Interceptors provide an excellent means to wrap before/after processing. The concept reduces code duplication (think AOP).
Order of interceptors...
<interceptor-stack name="xaStack">
<interceptor-ref name="thisWillRunFirstInterceptor"/>
<interceptor-ref name="thisWillRunNextInterceptor"/>
<interceptor-ref name="followedByThisInterceptor"/>
<interceptor-ref name="thisWillRunLastInterceptor"/>
</interceptor-stack>
Note that some interceptors will interrupt the stack/chain/flow... so the order is very important.
Iterceptors implementing com.opensymphony.xwork.interceptor.PreResultListener will run after the Action executes its action method but before the Result executes
thisWillRunFirstInterceptor
thisWillRunNextInterceptor
followedByThisInterceptor
thisWillRunLastInterceptor
MyAction1
MyAction2 (chain)
MyPreResultListener
MyResult (result)
thisWillRunLastInterceptor
followedByThisInterceptor
thisWillRunNextInterceptor
thisWillRunFirstInterceptor
Order of interceptors...
<interceptor-stack name="xaStack">
<interceptor-ref name="thisWillRunFirstInterceptor"/>
<interceptor-ref name="thisWillRunNextInterceptor"/>
<interceptor-ref name="followedByThisInterceptor"/>
<interceptor-ref name="thisWillRunLastInterceptor"/>
</interceptor-stack>
Note that some interceptors will interrupt the stack/chain/flow... so the order is very important.
Iterceptors implementing com.opensymphony.xwork.interceptor.PreResultListener will run after the Action executes its action method but before the Result executes
thisWillRunFirstInterceptor
thisWillRunNextInterceptor
followedByThisInterceptor
thisWillRunLastInterceptor
MyAction1
MyAction2 (chain)
MyPreResultListener
MyResult (result)
thisWillRunLastInterceptor
followedByThisInterceptor
thisWillRunNextInterceptor
thisWillRunFirstInterceptor
