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.handleStreamExcept
ion(UnmarshallerImpl.java:425)
at
com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(Unmarsh
allerImpl.java:362)
at
com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal(Unmarsha
llerImpl.java:332)
at
org.apache.cxf.jaxrs.provider.JSONProvider.readFrom(JSONProvider.java:156)
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.java:39
)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl
.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(MethodR
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(JUnit4ClassRun
ner.java:88)
at
org.junit.internal.runners.JUnit4ClassRunner.runMethods(JUnit4ClassRunner.ja
va:51)
at
org.junit.internal.runners.JUnit4ClassRunner$1.run(JUnit4ClassRunner.java:44
)
at
org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:27)
at
org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:37)
at
org.junit.internal.runners.JUnit4ClassRunner.run(JUnit4ClassRunner.java:42)
at
org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestRef
erence.java:46)
at
org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:3
8)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRu
nner.java:467)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRu
nner.java:683)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.
java:390)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner
.java:197)
Caused by: javax.xml.bind.UnmarshalException: unexpected element (uri:"",
local:"id"). Expected elements are <{}>,<{}tokens.json>
at
com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext.handleEvent(Un
marshallingContext.java:642)
at
com.sun.xml.bind.v2.runtime.unmarshaller.Loader.reportError(Loader.java:254)
at
com.sun.xml.bind.v2.runtime.unmarshaller.Loader.reportError(Loader.java:249)
at
com.sun.xml.bind.v2.runtime.unmarshaller.Loader.reportUnexpectedChildElement
(Loader.java:116)
at
com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext$DefaultRootLoa
der.childElement(UnmarshallingContext.java:1049)
at
com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext._startElement(
UnmarshallingContext.java:478)
at
com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext.startElement(U
nmarshallingContext.java:459)
at
com.sun.xml.bind.v2.runtime.unmarshaller.InterningXmlVisitor.startElement(In
terningXmlVisitor.java:71)
at
com.sun.xml.bind.v2.runtime.unmarshaller.StAXStreamConnector.handleStartElem
ent(StAXStreamConnector.java:242)
at
com.sun.xml.bind.v2.runtime.unmarshaller.StAXStreamConnector.bridge(StAXStre
amConnector.java:176)
at
com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(Unmarsh
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
>>>>>
>>>
>>
>
