CxfRsInvoker produces NullpointerException when no ContinuationProvider is set
the InMessage
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Key: CAMEL-3343
URL: https://issues.apache.org/activemq/browse/CAMEL-3343
Project: Apache Camel
Issue Type: Bug
Components: camel-cxf
Affects Versions: 2.5.0
Reporter: Boris Terzic
In my usage of CXF-RS with Camel through the camel-cxf component I ran into a
NullpointerException, the specific case is described in some detail on
StackOverflow:
http://stackoverflow.com/questions/4198461/why-do-i-get-a-nullpointerexception-when-invoking-the-cxf-rs-endpoint-of-a-camel
Specifically I run into a NullpointerException:
{code:java}
Caused by: java.lang.NullPointerException
at
org.apache.camel.component.cxf.jaxrs.CxfRsInvoker.getContinuation(CxfRsInvoker.java:63)
at
org.apache.camel.component.cxf.jaxrs.CxfRsInvoker.performInvocation(CxfRsInvoker.java:52)
at
org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:89)
... 33 more
{code}
I was assuming I was misconfiguring something but didn't find any alternative
way so I started digging in the camel-cxf source code.
I found that such a "getContinuation" method also exists for the
{{org.apache.camel.component.cxf.CxfConsumer}} as well as for the CxfRsInvoker
(where it was failing for me). However in the case of the CxfConsumer there is
a guard on the ContinuationProvider so that if it is null, then null is
returned:
{code:java}
return provider == null ? null : provider.getContinuation();
{code}
CxfRsInvoker does not have this guard, but it does have code to deal with a
"null" Continuation at the calling site (line 52, in performInvocation).
Therefore I assumed this was a bug and patched the guard into the CxfRsInvoker
as well.
My program now seems to work correctly. I assume this is a bug.
For completeness sake, this is what getContinuation now looks like for me:
{code:java}
private Continuation getContinuation(Exchange cxfExchange) {
ContinuationProvider provider =
(ContinuationProvider)cxfExchange.getInMessage().get(ContinuationProvider.class.getName());
return provider == null ? null : provider.getContinuation();
}
{code}
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