Hi Francesco, I am not 100% sure that is a solution for your case, but I have used Jackson specific annotation in AbstractSchemaTO: @JsonTypeInfo(use=Id.CLASS, include=As.PROPERTY, property="class").
Annotation is currently deactivated, because it causes conflicts with Syncope Spring MVC Rest implementation. The annotation forces client to send concrete class name in JSON representation, as a result service has more information to construct concrete class. As I can remember, I have tested this code for JSON using CXF JAX-RS client and service. Could you try to activate it and retest? Regards, Andrei. > -----Original Message----- > From: Francesco Chicchiriccò [mailto:[email protected]] > Sent: Donnerstag, 18. Juli 2013 09:26 > To: [email protected] > Subject: Re: Cannot deserialize JSON via JacksonJaxbJsonProvider (that > works via Jackson's ObjectMapperm anyway) > > On 17/07/2013 18:22, Sergey Beryozkin wrote: > > Hi, > > On 17/07/13 16:33, Francesco Chicchiriccò wrote: > >> On 17/07/2013 17:07, Sergey Beryozkin wrote: > >>> OK, thanks for the info. I'll have a look asap. > >>> FYI, I thing this what I believe the original client code can be > >>> simplified. You may have a much simpler injection code directly with > >>> jaxrs:client, accept & content-type headers can also be set on > >>> jaxrs:client, so you only should get either a proxy injected or > >>> WebClient (set 'serviceClass' attribute to a full WebClient class > >>> name). > >>> > >>> At the moment I suspect that a client proxy may not be providing a > >>> correct type info to Jackson given a somewhat complex interface > >>> declaration, I'll check. Please try using WebClient directly in > >>> meantime > >> > >> Thanks for suggestion; this works as expected: > >> > >> WebClient client = restClientFactory.createWebClient(). > >> > path("http://localhost:9080/syncope/cxf/schemas/user/NORMAL/fullname"; > ). > >> accept(MediaType.APPLICATION_JSON); > >> SchemaTO schema = client.get(SchemaTO.class); > >> > >> Looking forward to see how client code could be simplified (and > >> working...). > >> > > > > Thanks for the update. I'm pretty sure I know what the problem is. > > Good :-) > > > When we have a proxy, all it sees is > > > > <T extends AbstractSchemaTO> T read(@PathParam("kind") > > AttributableType kind, @PathParam("type") SchemaType type, > > @PathParam("name") String schemaName); > > > > Now the problem here is that SchemaTO.class is not visible to proxy, > > so what it reports to Jackson is that it expects an instrance of > > AbstractSchemaTO.class back (which is all it can find from the > > signature). > > > > I wonder if "T extends AbstractSchemaTO" needs to pushed up from all > > the methods to the interface declaration, and even after that is done, > > we probably need to add a new factory method, so that one can do > > > > SchemaService<SchemaTO> service = JAXRSClientFactory.create(address, > > new GenericType<SchemaService<SchemaTO>>(){}); > > (using JAX-RS 2.0 GenericType) > > > > So that when we do > > > > proxy.read(...), the proxy is capable of passing the correct info to > > the providers, > > > > So, it is an interesting enhancement to deal with :-) (won't make into > > 2.7.6 though, Dan is busy with doing the release as we speak), > > Understand: are you going to open an issue for this? > > > but in meantime using WebClient will do > > As a proof-of-concept, for sure; however, we need to keep the same CXF > code for both XML and JSON, hence we will be waiting for the enhancement > above. > > Thanks again for your support. > Regards. > > >>> On 17/07/13 15:45, Francesco Chicchiriccò wrote: > >>>> On 17/07/2013 16:39, Sergey Beryozkin wrote: > >>>>> Hi Francesco, > >>>>> > >>>>> How do you use WebClient, let me know and I'll will check > >>>> > >>>> (restClientFactory is injected via Spring) > >>>> > >>>> restClientFactory.setServiceClass(SchemaService.class); > >>>> final T serviceProxy = > >>>> restClientFactory.create(SchemaService.class); > >>>> > WebClient.client(serviceProxy).type(MediaType.APPLICATION_JSON).acc > >>>> ept(MediaType.APPLICATION_JSON); > >>>> > >>>> > >>>> > >>>> > >>>> then > >>>> > >>>> serviceProxy.read(AttributableType.USER, SchemaType.NORMAL, > >>>> "firstname")); > >>>> > >>>> this last statement throws the exception reported below. > >>>> > >>>> These are the last lines of the CXF client logging when executing > >>>> the code above: > >>>> > >>>> 16:13:18.808 [main] DEBUG o.a.cxf.phase.PhaseInterceptorChain - > >>>> Chain org.apache.cxf.phase.PhaseInterceptorChain@555bc78f was > created. > >>>> Current > >>>> flow: > >>>> receive [LoggingInInterceptor] > >>>> pre-protocol-frontend [ClientResponseFilterInterceptor] > >>>> > >>>> 16:13:18.808 [main] DEBUG o.a.cxf.phase.PhaseInterceptorChain - > >>>> Invoking handleMessage on interceptor > >>>> org.apache.cxf.interceptor.LoggingInInterceptor@2b95b0f5 > >>>> 16:13:18.810 [main] INFO o.a.c.i.LoggingInInterceptor - Inbound > >>>> Message > >>>> ---------------------------- > >>>> ID: 1 > >>>> Response-Code: 200 > >>>> Encoding: UTF-8 > >>>> Content-Type: application/json;charset=UTF-8 > >>>> Headers: {content-type=[application/json;charset=UTF-8], Date=[Wed, > >>>> 17 Jul 2013 14:13:18 GMT], Server=[Apache-Coyote/1.1], > >>>> transfer-encoding=[chunked]} > >>>> Payload: > >>>> {"name":"firstname","type":"String","mandatoryCondition":"false","e > >>>> numerationValues":null,"enumerationKeys":null,"multivalue":false,"u > >>>> niqueConstraint":false,"readonly":false,"conversionPattern":null,"v > >>>> alidatorClass":null} > >>>> > >>>> > >>>> > >>>> -------------------------------------- > >>>> 16:13:18.810 [main] DEBUG o.a.cxf.phase.PhaseInterceptorChain - > >>>> Invoking handleMessage on interceptor > >>>> org.apache.cxf.jaxrs.client.spec.ClientResponseFilterInterceptor@7a > >>>> aa977 > >>>> > >>>> java.lang.ClassCastException: java.util.LinkedHashMap cannot be > >>>> cast to org.apache.syncope.common.to.AbstractSchemaTO > >>>> > >>>> > >>>> Thanks for your support! > >>>> Regards. > >>>> > >>>>> On 17/07/13 15:20, Francesco Chicchiriccò wrote: > >>>>>> Hi all, > >>>>>> I have a quite silly question, probably due to my inexperience with > >>>>>> CXF. > >>>>>> > >>>>>> Basically, in Syncope we have a set of CXF services producing > >>>>>> both XML > >>>>>> and JSON (via Jackson). > >>>>>> > >>>>>> At high level, I have troubles when reading JSON payload, via > >>>>>> WebClient; > >>>>>> the same input string (received as Payload), when given to a bare > >>>>>> Jackson's ObjectMapper instance, works like a charm. > >>>>>> > >>>>>> More in detail, the CXF service configuration is the one at [1]. > >>>>>> > >>>>>> When issuing, with header "Accept: application/json", an HTTP GET > >>>>>> /syncope/cxf/schemas/user/NORMAL/fullname (e.g. read() as > defined at > >>>>>> [2]), it returns > >>>>>> > >>>>>> { > >>>>>> "name": "fullname", > >>>>>> "type": "String", > >>>>>> "mandatoryCondition": "true", > >>>>>> "enumerationValues": null, > >>>>>> "enumerationKeys": null, > >>>>>> "multivalue": false, > >>>>>> "uniqueConstraint": true, > >>>>>> "readonly": false, > >>>>>> "conversionPattern": null, > >>>>>> "validatorClass": null > >>>>>> } > >>>>>> > >>>>>> which looks correct; in fact I am easily able to deserialize such > >>>>>> input via > >>>>>> > >>>>>> ObjectMapper mapper = new ObjectMapper(); > >>>>>> SchemaTO actual = mapper.readValue(writer.toString(), > >>>>>> SchemaTO.class); > >>>>>> > >>>>>> but when I try to use WebClient for accessing the same read() > >>>>>> method I > >>>>>> get stuck with > >>>>>> > >>>>>> ClassCastException: java.util.LinkedHashMap cannot be cast to > >>>>>> org.apache.syncope.common.to.AbstractSchemaTO > >>>>>> > >>>>>> which looks definitely like a Jackson exception. > >>>>>> > >>>>>> For additional reference, here is my client's Spring > >>>>>> configuration [3] > >>>>>> (see 'restClientFactory') and the AbstractSchemaTO [4] and > SchemaTO > >>>>>> classes [5]. > >>>>>> > >>>>>> Nevertheless to say, switching to "Accept: application/xml" makes > >>>>>> everything work again. > >>>>>> > >>>>>> I am using CXF 2.7.6-SNAPSHOT (this in order to be able to use > >>>>>> Jackson > >>>>>> 2.2.2). > >>>>>> > >>>>>> Any hint? > >>>>>> > >>>>>> Regards. > >>>>>> > >>>>>> [1] > >>>>>> > https://svn.apache.org/repos/asf/syncope/trunk/core/src/main/resources/ > restContext.xml > >>>>>> > >>>>>> > >>>>>> > >>>>>> > >>>>>> [2] > >>>>>> > https://svn.apache.org/repos/asf/syncope/trunk/common/src/main/java/o > rg/apache/syncope/common/services/SchemaService.java > >>>>>> > >>>>>> > >>>>>> > >>>>>> > >>>>>> [3] > >>>>>> > https://github.com/ilgrosso/syncopeRestClient/blob/master/src/main/resou > rces/applicationContext.xml > >>>>>> > >>>>>> > >>>>>> > >>>>>> > >>>>>> [4] > >>>>>> > https://svn.apache.org/repos/asf/syncope/trunk/common/src/main/java/o > rg/apache/syncope/common/to/AbstractSchemaTO.java > >>>>>> > >>>>>> > >>>>>> > >>>>>> > >>>>>> [5] > >>>>>> > https://svn.apache.org/repos/asf/syncope/trunk/common/src/main/java/o > rg/apache/syncope/common/to/SchemaTO.java > >>>>>> > > > > -- > Francesco Chicchiriccò > > ASF Member, Apache Syncope PMC chair, Apache Cocoon PMC Member > http://people.apache.org/~ilgrosso/
