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From "Willem Jiang (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (CAMEL-1581) ClassCastException when using camel-cxf and camel-jms in the InOut same flow
Date Sun, 03 May 2009 01:56:39 GMT

     [ https://issues.apache.org/activemq/browse/CAMEL-1581?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Willem Jiang resolved CAMEL-1581.
---------------------------------

    Resolution: Fixed

>  ClassCastException when using camel-cxf and camel-jms in the InOut same flow
> -----------------------------------------------------------------------------
>
>                 Key: CAMEL-1581
>                 URL: https://issues.apache.org/activemq/browse/CAMEL-1581
>             Project: Apache Camel
>          Issue Type: Bug
>    Affects Versions: 1.5.0, 1.6.0
>            Reporter: Willem Jiang
>            Assignee: Willem Jiang
>             Fix For: 1.6.1
>
>
> As per thread on FUSE forum http://fusesource.com/forums/thread.jspa?threadID=834&tstart=0:
> [[
> I have a camel route that listens on a CXFEndpoint (for MESSAGE data as DOMSource) and
routes the message to a JMS queue. Something like:
> <route>
> <from uri="cxf:bean:passportRequestWS?dataFormat=MESSAGE"/>
> <to uri="soapProcessor"/>
> <convertBodyTo type="java.lang.String"/>
> <to uri="activemq:queue:blah"/>
> <convertBodyTo type="javax.xml.transform.dom.DOMSource"/>
> </route>
> My understanding is that the JMS producer will realize that the exchange is InOut, create
a temporary queue for the response, and then wait for the response to arrive on the temporary
queue before sending the original CXFExchange on along the pipeline. Indeed, this is what
I observe! However, I?ve discovered a little nasty.
> When the JMSProducer gets in the incoming message, it sets the Out message of the original
CXFExchange to a JmsMessage. Then, the pipeline processor calls exchange.getOut on the CXFExchange
and BANG! we get a class-cast exception. Turns out that the CXFExchange.getOut() method always
casts the message to a CxfMessage. Ouch. Surely this means then that camel-cxf can?t talk
to any producer that does not produce a CXFMessage - very limiting.
> ]]
> The response on the form from davsclaus was:
> [[
> Well spotted.
> If just the damn Exchange was final so we had one implementation of it. But I guess we
have to thank Java generics for that so the first API had generics for per component.
> Could you create a ticket in JIRA for this?
> As a workaround you can add a processor where you have full access to the Exchange so
you can set a CxfMessage as the payload.
> ]]

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