7.12.5. Some common exceptions
If you are using JPA:
<exception class="javax.persistence.EntityNotFoundException">
<redirect view-id="/error.xhtml">
<message>Not found</message>
</redirect>
</exception>
<exception class="javax.persistence.OptimisticLockException">
<end-conversation/>
<redirect view-id="/error.xhtml">
<message>
Another user changed the same data, please try again
</message>
</redirect>
</exception>
If you are using the Seam Application Framework:
<exception class="org.jboss.seam.framework.EntityNotFoundException">
<redirect view-id="/error.xhtml">
<message>Not found</message>
</redirect>
</exception>
If you are using Seam Security:
<exception class="org.jboss.seam.security.AuthorizationException">
<redirect>
<message>You don't have permission to do this</message>
</redirect>
</exception>
<exception class="org.jboss.seam.security.NotLoggedInException">
<redirect view-id="/login.xhtml">
<message>Please log in first</message>
</redirect>
</exception>
And, for JSF:
<exception class="javax.Faces.application.ViewExpiredException">
<redirect view-id="/error.xhtml">
<message>Your session has timed out, please try again</message>
</redirect>
</exception>
A
ViewExpiredException occurs when the user posts to a page after their session has expired. The conversation-required and no-conversation-view-id settings in the Seam page descriptor, discussed in Section 8.4, “Requiring a long-running conversation”, allow finer-grained control over session expiration while accessing a page used within a conversation.
