Hi It is a sequence without a root element, so you need to apply one extra bit of configuration to the JSONProvider instance [1], wrapperName="", given that you set XMlRootElement name to "". Perhaps it would make sense to use @XmlRootElement and wrapperName="Credentials" ? If you have not only Credentials but other classes to deal with then you may want to use a wrapperMap property instead.
Updating the JSONProvider to handle custom consume types is a better solution, but in case you'll need to use inInterceptors then you can change the Content-Type like this message.set(Message.CONTENT_TYPE, "application/json"); Hope it helps, Sergey [1] http://cxf.apache.org/docs/jax-rs.html#JAX-RS-WrappingandUnwrappingJSONs equences -----Original Message----- From: Sadhana Jain [mailto:[email protected]] Sent: 07 November 2009 08:18 To: [email protected] Subject: Re: Is it possible to parse json response using JAXRS WebClient? Hi Sergey, Thanks very much again for your quick reply. I was able to get the correct content-type set by creating the JsonProvider in the code and setting the media types and using WebClient's create method to register the provider. However, I am still not able to get the json parsed and stored in the Credentials bean correctly. I get this error during parsing (which unmarshaller should the JosnProvider use to unmarshall json?): Nov 7, 2009 12:02:40 AM org.apache.cxf.jaxrs.provider.AbstractJAXBProvider handleJAXBException WARNING: javax.xml.bind.UnmarshalException - with linked exception: [javax.xml.bind.UnmarshalException: unexpected element (uri:"", local:"id"). Expected elements are <{}>] at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.handleStreamEx cept ion(UnmarshallerImpl.java:425) at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(Unm arsh allerImpl.java:362) at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal(Unma rsha llerImpl.java:332) at org.apache.cxf.jaxrs.provider.JSONProvider.readFrom(JSONProvider.java:15 6) at org.apache.cxf.jaxrs.client.AbstractClient.readBody(AbstractClient.java: 401) at org.apache.cxf.jaxrs.client.WebClient.handleResponse(WebClient.java:544) at org.apache.cxf.jaxrs.client.WebClient.doChainedInvocation(WebClient.java :536 ) at org.apache.cxf.jaxrs.client.WebClient.doInvoke(WebClient.java:510) at org.apache.cxf.jaxrs.client.WebClient.invoke(WebClient.java:286) at org.apache.cxf.jaxrs.client.WebClient.get(WebClient.java:314) at gwy.flixster.FlixsterAPITest.getCredentialsTest(FlixsterAPITest.java:67) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.jav a:39 ) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessor Impl .java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.junit.internal.runners.TestMethod.invoke(TestMethod.java:59) at org.junit.internal.runners.MethodRoadie.runTestMethod(MethodRoadie.java: 98) at org.junit.internal.runners.MethodRoadie$2.run(MethodRoadie.java:79) at org.junit.internal.runners.MethodRoadie.runBeforesThenTestThenAfters(Met hodR oadie.java:87) at org.junit.internal.runners.MethodRoadie.runTest(MethodRoadie.java:77) at org.junit.internal.runners.MethodRoadie.run(MethodRoadie.java:42) at org.junit.internal.runners.JUnit4ClassRunner.invokeTestMethod(JUnit4Clas sRun ner.java:88) at org.junit.internal.runners.JUnit4ClassRunner.runMethods(JUnit4ClassRunne r.ja va:51) at org.junit.internal.runners.JUnit4ClassRunner$1.run(JUnit4ClassRunner.jav a:44 ) at org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:2 7) at org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:37) at org.junit.internal.runners.JUnit4ClassRunner.run(JUnit4ClassRunner.java: 42) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4Tes tRef erence.java:46) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.ja va:3 8) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTe stRu nner.java:467) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTe stRu nner.java:683) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRun ner. java:390) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRu nner .java:197) Caused by: javax.xml.bind.UnmarshalException: unexpected element (uri:"", local:"id"). Expected elements are <{}>,<{}tokens.json> at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext.handleEven t(Un marshallingContext.java:642) at com.sun.xml.bind.v2.runtime.unmarshaller.Loader.reportError(Loader.java: 254) at com.sun.xml.bind.v2.runtime.unmarshaller.Loader.reportError(Loader.java: 249) at com.sun.xml.bind.v2.runtime.unmarshaller.Loader.reportUnexpectedChildEle ment (Loader.java:116) at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext$DefaultRoo tLoa der.childElement(UnmarshallingContext.java:1049) at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext._startElem ent( UnmarshallingContext.java:478) at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext.startEleme nt(U nmarshallingContext.java:459) at com.sun.xml.bind.v2.runtime.unmarshaller.InterningXmlVisitor.startElemen t(In terningXmlVisitor.java:71) at com.sun.xml.bind.v2.runtime.unmarshaller.StAXStreamConnector.handleStart Elem ent(StAXStreamConnector.java:242) at com.sun.xml.bind.v2.runtime.unmarshaller.StAXStreamConnector.bridge(StAX Stre amConnector.java:176) at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(Unm arsh allerImpl.java:360) ... 31 more Caused by: javax.xml.bind.UnmarshalException: unexpected element (uri:"", local:"id"). Expected elements are <{}>] ... 42 more The json response from the service looks like this: { "id": 157373130, "token":"xxxx......." ........ } In the Credentails class I have: @XmlRootElement(name="") public class Credentials { private String id; private String token; .... Getter/setters defined. } Any idea why I am getting this exception? Which reader does actually do the json unmarshalling? Thanks much, Sadhana P.S. Thanks for the info on Spring configuration - I tried it but am running into issues. I will try later after it is working without spring configuration. I tried InInterceptor to change the content type but didn't know how I will set it in the Message. I didn't see any methods to set the values. Can you please give an example? On 11/6/09 3:26 PM, "Sergey Beryozkin" <[email protected]> wrote: > Hi > > You can update the incoming Content-Type in a couple of ways : > 1. Configure JSONProvider to accept text/javascript and application/json > (set consumeTypes on it). > When registering JSONProvider from Spring you can do the way it's done > here : > http://svn.apache.org/repos/asf/cxf/trunk/systests/jaxrs/src/test/resour > ces/jaxrs/WEB-INF/beans.xml > > See the 'jsonProvider' bean. > > Or you can configure a JSONProvider from the code and register it using > one of the WebClient.create() methods > > 2. Register a custom CXF input interceptor (as shown below for > LoggingInInterceptor) and set a Message.ContentType property on the > message to application/json > > >> Is there a way to specify configuration in Spring? Also how does >> jaxrs:client configuration in Spring work for WebClient? > > jaxrs:client is a proxy based client created from spring and it is meant > to be injected into a client code. But you can also create and configure > a WebClient from Spring if needed but it will also have to be injected > into the code - is it what you'd like to do ? > For ex, if a jaxrs:client or WebClient bean created from spring has an > id 'client' then you can have a field (of type WebClient for ex) > annotated with @Resource("client") and Spring will inject this bean.... > > >> If I want to configure my own MessageBody Json reader for processing > the >> json response, how would I do that? > > Please see above : either from code or from Spring > > Cheers, Sergey > > > -----Original Message----- > From: Sadhana Jain [mailto:[email protected]] > Sent: 06 November 2009 18:13 > To: [email protected] > Subject: Re: Is it possible to parse json response using JAXRS > WebClient? > > Hi Sergey, > > Thank you so much for your quick responses and elaborate replies. > > > On 11/6/09 5:31 AM, "Sergey Beryozkin" <[email protected]> wrote: > >> Hi Sadhana >> >>> Hi Sergey, >>> >>> Here is what I am doing: >>> WebClient wc = WebClient.create("http://xxx.com/api/v1/tokens.json";); >>> wc.query("login", "jessicamontgomery"); >>> wc.query("password", "password"); >>> Credentials c = > wc.accept("application/json").get(Credentials.class); >>> >>> Credentials class is a pojo that contains all the getter/setters for > all >>> keys in the json response I am getting from the service. >> >> Is it a JAXB bean ? > Yes, I did put the XmlRootElement annotation for the class thought the > element name is null as I don't have a corresponding element in the json > response. >> >>> >>> The Error I get is: >>> Nov 6, 2009 2:00:58 AM org.apache.cxf.jaxrs.client.AbstractClient >>> reportNoMessageHandler >>> SEVERE: .No message body reader found for class : class >>> gwy.flixster.pojo.Credentials, ContentType : {1}. >>> >> >> If Credentials is not a JAXB bean then JSONProvider will return false > in >> isReadable() >> Another thing to check what ContentType the target service sets on the >> response. You can do it with a tcp trace utilty (for ex, >> assuming the target service is listening on "http://xxx.com:8080"; then > you >> update the client code to send a request to >> "http://xxx.com:8081"; and configure a tcptrace to redirect to >> "http://xxx.com:8081";). > Thanks for the tip. I did find that Content-Type returned was > text/javascript instead of application/json. I tried text/javascript as > accept header but still get the same error. > >> >> Another option is to configure a logging feature or logging in > interceptor : >> >> WebClient.getConfig(client).getInInterceptors().add(new >> LoggingInInterceptor()) > > Is there a way to specify configuration in Spring? Also how does > jaxrs:client configuration in Spring work for WebClient? > >> >>> Do I need to define jsonprovider whe creating the webclient? >> >> No, unless you'd like to configure the JSONProvider somehow. For > example, if >> Credentials is not annotated with say @XmlRootElement >> then you can configure JSONProvider with a property > 'unmarshallAsJaxbElement' >> with a value 'true'. >> > If I want to configure my own MessageBody Json reader for processing the > json response, how would I do that? > > Thanks a lot....again! > Sadhana >> thanks, Sergey >> >>> >>> Thanks, >>> Sadhana >>> >>> On 11/6/09 1:37 AM, "Sergey Beryozkin" <[email protected]> wrote: >>> >>>> Hi, >>>> >>>>> >>>>> Hi, >>>>> >>>>> I am using the JAXRS WebClient API and get a json response from a > rest >>>>> service. Does CXF support reading of the json using a message body > reader >>>>> that I can attach to the WebClient? Are there any examples of the > usage of >>>>> WebClient showing processing of the response? >>>> >>>> It should work out of the box....What issues you're seeing in > reading JSON ? >>>> Can you please post a sample >>>> sequence ? >>>> >>>> thanks, Sergey >>>> >>>>> >>>>> Thanks very much for any help. >>>>> Sadhana >>>>> >>> >> >
