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From "Allen, Daniel" <>
Subject Extending interceptor stacks
Date Thu, 21 Feb 2008 22:26:59 GMT
Is there a way to have one interceptor stack defined in terms of
another? I created a log-in interceptor to check if a user is logged in
and redirect him/her to the log-in page if not, and it will be applied
to almost all pages, but there will be a few (index, etc.) that would
not need that. However, most other pages use the same basic
interceptors, just not the log-in one. So, given the below, is there a
way to change it so that it's two stacks, one missing the log-in, and
the other only declaring its parent and adding the log-in?

	<interceptor-stack name="defaultLoginStack">
          <interceptor-ref name="params" />
          <interceptor-ref name="login" />
          <interceptor-ref name="prepare" />
          <interceptor-ref name="fileUpload" />
          <interceptor-ref name="conversionError" />
          <interceptor-ref name="validation" />

I'm guessing it's not, since I didn't see anything that seemed likely in
the struts.xml documentation page,[1] but I thought I'd ask and make
sure, or find out if there's some non-XML way of doing an equivalent.
(Or possibly if there's a reason I shouldn't be doing this in the first

~Dan Allen


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