Hi
See the option skipBindingOnErrorCode
http://camel.apache.org/rest-dsl
On Wed, May 27, 2015 at 6:33 PM, Brian Drysdale
<brian.drysd...@gmail.com> wrote:
> Hello,
>
> I'm hoping someone can help me with something.
>
> I'm evaluating the suitability of Camel 2.15 for building a rest API with
> JSON and have run into a problem when marshalling POJOs when the HTTP
> response code is not 200 Ok.
>
> I've opted to use the Camel Spark Rest component, and have modified the
> example code to test out error handling.
>
> To facilitate discussion and avoid sending pages of code I've included the
> modified version of the UserRouteBuilder.java example code below that I've
> used to replicate this problem:
>
> package org.apache.camel.example.spark;
>
> import org.apache.camel.builder.RouteBuilder;
> import org.apache.camel.model.rest.RestBindingMode;
> import org.apache.camel.Exchange;
>
> /**
> * Define REST services using the Camel REST DSL
> */
> public class UserRouteBuilder extends RouteBuilder {
>
> @Override
> public void configure() throws Exception {
>
> // configure we want to use spark-rest as the component for the
> rest DSL
> // and we enable json binding mode
>
> restConfiguration().component("spark-rest").bindingMode(RestBindingMode.json).dataFormatProperty("prettyPrint",
> "true");
>
> // this user REST service is json only
>
> rest("/user").consumes("application/json").produces("application/json")
> .get("/view/{id}").outType(User.class)
> .to("direct:getUser");
>
> from("direct:getUser")
> .to("bean:userService?method=getUser(${header.id})")
> .setHeader(Exchange.HTTP_RESPONSE_CODE, constant(400));
> }
>
> }
>
> When run from the Spark Rest Tomcat example (using Jetty) the response
> output is the User Object hash code
> (org.apache.camel.example.spark.User@4ba6cfd4 for example) instead of the
> JSON string for the object.
>
> If I modify the code and remove the call to setHeader, or set the response
> code to 200 I get the object as expected.
>
> I have tested manually marshalling, which works if I run it as follows:
>
> ...
> import org.apache.camel.model.dataformat.JsonLibrary;
> ...
> public void configure() throws Exception {
> ...
> from("direct:getUser")
> .to("bean:userService?method=getUser(${header.id})")
> .setHeader(Exchange.HTTP_RESPONSE_CODE, constant(400))
> .setHeader(Exchange.CONTENT_TYPE, constant("application/json"))
> .marshal().json(JsonLibrary.Jackson);
> }
>
> }
>
> I've also re-worked the code to throw an Exception and handle this using
> the onException method but again encounter the same problem, which can only
> be resolved by manually marshalling.
>
> Since I plan on having the API respond using other HTTP response codes
> (400, 404 etc), with JSON messages containing the problem details how am I
> supposed to set the response code and have objects marshalled automatically?
>
> The docs only cover responding in this circumstance in plain text, but as
> this will be an API I need to respond with a more detailed messages and
> would hate to have to manually marshal the responses.
>
> I'm assuming I'm missing some thing here, can anyone please help?
>
> Thanks,
>
> Brian
--
Claus Ibsen
-----------------
Red Hat, Inc.
Email: cib...@redhat.com
Twitter: davsclaus
Blog: http://davsclaus.com
Author of Camel in Action: http://www.manning.com/ibsen
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