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From "Ravi Luthra (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CXF-6480) InjectionUtils createThreadLocalServletApiContext better error message for invalid @Context classes
Date Tue, 30 Jun 2015 17:58:06 GMT
Ravi Luthra created CXF-6480:
--------------------------------

             Summary: InjectionUtils createThreadLocalServletApiContext better error message
for invalid @Context classes
                 Key: CXF-6480
                 URL: https://issues.apache.org/jira/browse/CXF-6480
             Project: CXF
          Issue Type: Bug
         Environment: All OS
            Reporter: Ravi Luthra


When you have an \@Context field in a JAXRS class (maybe JAXWS too?) there is a select list
of possible proxy classes. This method checks for the proxy class using an if/else/if/else...
structure, but there is no final else clause with a good exception. Instead the method attempts
to instantiate a null class name (proxyClassName), which throws a NullPointerException. This
leaves the method wrapped inside a RuntimeException. A common forgetful change someone might
make is to add
{code}@Context private HttpSession session; //(instead of private HttpServletRequest){code}

Which leaves a massive stack trace leaving just an NPE and Spring also tends to obscure the
stack-trace of this issue. A better error would be to suggest that the given class ...HttpSession
is not a valid Context type. No proxy classes can be created for this type.



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