Spring Webflow - access exception using transition.on-exception attribute

I wondering how can I access exception o开发者_JS百科bject using on-exception attribute? My current configuration looks like this:

<transition on-exception="{business_exception}" to="errorView" >
</transition>

I have to access some exception attribute in errorView. Does anybody know how can I do it?

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This is a rather undocumented part of Spring Web Flow, but according to this thread on SpringSource forum, you can access the exception directly on your view as attributes stateException and rootCauseException.

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rootCauseException and flowExecutionException are the right scoped variables that are accessible in the flow. These variables are populated after the transition to the new flow,so in a pseudo sense:

<transition on-exception="{business_exception}" to="errorView" >
</transition>

<view-state id="errorView">
  <on-entry>
    <evaluate expression="exceptionHandler(flowExecutionException)"/>
    <evaluate expression="exceptionHandler(rootCauseException)"/> 
  </on-entry>
</view-state>