[jira] [Created] (CAMEL-4014) cxf:rsServer requires class instead of interface in the serviceClass attribute

[Sergey Zhemzhitsky (JIRA)]

cxf:rsServer requires class instead of interface in the serviceClass attribute
------------------------------------------------------------------------------

                 Key: CAMEL-4014
                 URL: https://issues.apache.org/jira/browse/CAMEL-4014
             Project: Camel
          Issue Type: Improvement
          Components: camel-cxf
    Affects Versions: 2.7.1, 2.7.0, 2.6.0
            Reporter: Sergey Zhemzhitsky


Here are part of the conversation from the mailing list:

1.

Hi there,

I'm using apache-servicemix-4.3.1-fuse-01-09 and I need to consume RESTful 
requests.
Here is the documentation I have used: http://camel.apache.org/cxfrs.html
Here is my configuration file

<beans xmlns="http://www.springframework.org/schema/beans";
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
    xmlns:jaxrs="http://cxf.apache.org/jaxrs";
    xmlns:cxf="http://camel.apache.org/schema/cxf";
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans                 
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
        http://camel.apache.org/schema/spring                       
http://camel.apache.org/schema/spring/camel-spring.xsd
        http://cxf.apache.org/jaxrs                                 
http://cxf.apache.org/schemas/jaxrs.xsd
        http://camel.apache.org/schema/cxf                          
http://camel.apache.org/schema/cxf/camel-cxf.xsd
    ">
    <import resource="classpath:META-INF/cxf/cxf.xml" />
    <import resource="classpath:META-INF/cxf/cxf-extension-jaxrs-binding.xml" />
    <import resource="classpath:META-INF/cxf/cxf-extension-http.xml" />
    <import resource="classpath:META-INF/cxf/osgi/cxf-extension-osgi.xml" />

    <cxf:rsServer id="myServer" address="/" serviceClass="org.test.MyService" />

    <camelContext id="camel" xmlns="http://camel.apache.org/schema/spring";>
        <route>
            <from uri="cxfrs://bean:myServer?exchangePattern=InOut"/>
            <transform>
                <constant>Hello World!!!</constant>
            </transform>
        </route>
    </camelContext>
</beans>

Here is implementation of org.test.MyService

@Path("/service")
@Produces("application/json")
public class MyService {

    @POST
    @Path("/resource")
    public Response add(@QueryParam("res") String res) {
        return Response.ok(new Status("The Resource has been 
processed")).build();
    }

}

I'm wondering why we have to specify the serviceClass attribute and why this 
attribute should point at the real class. I'm asking because the response of 
such a service will always be "Hello World!!!" and implementation of 
MyService.add method does not matter in that case.

2.

Hi Ben,

You are right, the serviceClass is just used to build up the JAXRS service 
module. And Camel CXF RS Consumer doesn't all serviceClass instance at the end, 
it just route the request to the camel route.

3. 

Hi Willem, Ben

Thanks for the information.
I tried to use the interface instead of class in the serviceClass attribute and 
I didn't succeed because of an exception that told that the class is required.
Here is the exception:

Caused by: java.lang.RuntimeException: Resource class interface 
org.test.MyService has no valid constructor
        at 
org.apache.cxf.jaxrs.lifecycle.PerRequestResourceProvider.<init>(PerRequestResourceProvider.java:45)
        at 
org.apache.cxf.jaxrs.JAXRSServerFactoryBean.updateClassResourceProviders(JAXRSServerFactoryBean.java:338)
        at 
org.apache.cxf.jaxrs.JAXRSServerFactoryBean.create(JAXRSServerFactoryBean.java:119)
        ... 26 more

I think that using an interface would be better in that case.





--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira