[jboss-user] [JBoss Seam] - Error handling with error pages

[franky.b]

Hi there,

my goal is to add a custom error page to an existing seam app which should display both the (technical) description of the error with <h:messages> and a short sentence that can be understand by a normal user (e.g. "connection to database failed. please try again later") and depends on what kind of error occured, of course.
This should be achived with a singe error page.

I am not able to change the code of the app, so I can not raise custom exceptions in my beans.

Therefore, I started with an entry in exceptions.xml, which redirects two exemplary kinds of errors that occur before render phase to my generic error page.


  | <exception class="java.lang.RuntimeException">
  | 		<redirect view-id="/genericError.xhtml">
  | 		</redirect>
  | </exception>
  |  <exception class="javax.servlet.ServletException">
  |       <redirect view-id="/genericError.xhtml"></redirect>
  |  </exception>-->
  | 

Well, now I can access the technical error message in genericError.xhtml with
<h:messages globalOnly="true" styleClass="message" />

But how can I detect because of which of the two exceptions the error page was displayed, so that I can show the correct textual message? Is there something like a global error object?

Or can I pass the desired message or the kind of exception to my genericError.xhtml in some way?

I tried <param ..> but I did not get it to work.

Thanks in advance,
Frank

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