CODEWITHSUNDEEP
springjacksonapache-cameljax-rscxf
rapt
rapt

Reputation: 12230

Camel & CXF & REST: ERROR No message body writer has been found for class java.util.ArrayList, ContentType: application/json

In my Spring configuration file:

<bean id="jacksonJsonProvider" class="org.codehaus.jackson.jaxrs.JacksonJsonProvider" />

<bean id="restJacksonProviderList" class="java.util.ArrayList">
    <constructor-arg>
        <list>
            <ref bean="jacksonJsonProvider"/>
        </list>
    </constructor-arg>
</bean>

//......

<route id="RestMyRoute">
    <from id="RestRequest"  uri="cxfrs:/rest/MyService?resourceClasses=com.myself.services.MyService&amp;bindingStyle=SimpleConsumer&amp;providers=#restJacksonProviderList" />
    <to     uri="direct:doRoute" />
</route>

The Service interface:

@GET
@Path("/my/something/{id}")
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
@WebMethod
@WebResult(name = "getSomethingResponse")
public List<MySomething> getSomething(
    @PathParam("id") @WebParam(name = "id") String id);

The code above works! I can send the get request to the URl and I get a JSON response.

Now, I do a small change: Instead of defining the web service's URL (and the route) by XML configuration, I define them by Java code:

public class MyRoute extends RouteBuilder {

    private String uriRest = "cxfrs:/rest/MyService?resourceClasses=com.myself.services.MyService&amp;bindingStyle=SimpleConsumer&amp;providers=#restJacksonProviderList";

    @Override
    public void configure() throws Exception {

        from(uriRest).
        to("log:input").
        to("direct:doRoute").
        to("log:output");       
    }   
}

When I hit the web service URL, I am getting 500 Internal Server Error and in the logs (Tomcat) I see JAXRSUtils ERROR No message body writer has been found for class java.util.ArrayList, ContentType: application/json

Actually the debugger tells me that defining the URI by Java code is recognized, since I do hit the code inside the route.

I saw this error in many answers here, basically they say to add a Json provider and assign it to the CXF endpoint.

Seems to me like it is what I have done. But it does not work.

Any idea what I am doing wrong here?

Upvotes: 1

Views: 3303

Answers (1)

fiw
fiw

Reputation: 756

As peeskillet said, it's because there isn't a list of providers registered under the name restJacksonProviderList. You can get the JndiContext like this and bind a list to it in the configure method of your routebuilder:

JndiContext registry = (JndiRegistry) context.getRegistry();
registry.bind("restJacksonProviderList", Arrays.asList(new JacksonJsonProvider()));

Edit after comments: Change &amp; for & in your cxfrs uri definition, &amp; is only needed in xml.

Upvotes: 1

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