Hi Claus, Thanks, that's resolved the problem perfectly. Much appreciated.
Brian On 27 May 2015 at 18:02, Claus Ibsen <claus.ib...@gmail.com> wrote: > 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 > hawtio: http://hawt.io/ > fabric8: http://fabric8.io/ >
