Hi there, 

CAS Overlay is supposed to make it easier for upgrade. To the most part it 
is, however, if I have to redefine a bean or an existing configuration, I 
find I have to copy the file from CAS source, and change it in my overlay 
setup.

Here is an example, I copied over cas-servlet.xml, only because these two 
changes. Now I have a 4.1.5 cas-servlet.xml,  when I upgrade to 4.2, I have 
to incorporate 4.2 cas-servlet.xml, because it may have new changes, not as 
simple as change the CAS version in POM.xml

How do you deal with that in a better way?
Yan

<!--  to declare our own handler so that we can add additional exceptions 
-->
<bean id="authenticationExceptionHandler" 
class="org.jasig.cas.web.flow.MyAuthenticationExceptionHandler" />

  <webflow:flow-registry id="loginFlowRegistry" 
flow-builder-services="builder" base-path="/WEB-INF/webflow">
    <!-- changed to allow subflow,   -->
    <webflow:flow-location-pattern value="/login/**/*-webflow.xml"/>
  </webflow:flow-registry>


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