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From "Tom (JIRA)" <j...@apache.org>
Subject [jira] Updated: (CXF-2234) Unmarshalling with JAXB of a method that is defined in an inherited interface results in an NPE exception
Date Fri, 22 May 2009 14:18:46 GMT

     [ https://issues.apache.org/jira/browse/CXF-2234?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tom updated CXF-2234:
---------------------

    Attachment: services.rar

The source classes. But they are mixed in with all kinds of other libraries, like FEST reflection.

> Unmarshalling with JAXB of a method that is defined in an inherited interface results
in an NPE exception
> ---------------------------------------------------------------------------------------------------------
>
>                 Key: CXF-2234
>                 URL: https://issues.apache.org/jira/browse/CXF-2234
>             Project: CXF
>          Issue Type: Bug
>          Components: JAXB Databinding, Soap Binding
>    Affects Versions: 2.2.2
>         Environment: WindowsXP-SP3, Eclipse 3.4
>            Reporter: Tom
>         Attachments: services.rar
>
>
> The UserService:
> @javax.jws.WebService
> public interface UserService extends AbstractService<User, Users>
> {
> }
> The AbstractService:
> @javax.jws.WebService
> public interface AbstractService<T, Ts>
> {
> 	public Ts list();
> }
> The UserServiceImpl:
> @javax.jws.WebService(endpointInterface = "nl.knowledgeplaza.profiler.services.UserService",
serviceName = "users") // the "ws" prefix is handled by the container
> public class UserServiceImpl 
> implements UserService
> {
> 	public Users list()
> 	{
> 		try
> 		{
> 			if (slf4j.isDebugEnabled()) slf4j.debug("list User");
> 			
> 			// find all
> 			List<User> lList = User.findAll();
> 			if (slf4j.isDebugEnabled()) slf4j.debug("list User size={}", lList.size());
> 			
> 			// create a collection so JAXB knows what to do
> 			Users lUsers= new Users(lList);
> 			
> 			// done
> 			return lUsers;
> 		}
> 		catch (RuntimeException e)
> 		{
> 			slf4j.error(ExceptionUtil.describe(e), e);
> 			throw e;
> 		}
> 	}
> }
> UnitTests start the SOAP end point as follows:
>         javax.xml.ws.Endpoint.publish(cWSUserAddress, new UserServiceImpl());
> The unittest:
> 	@org.junit.Test
> 	public void listUsersSOAP()
> 	{
> 		// create a proxy to the service
> 		JaxWsProxyFactoryBean factory = new JaxWsProxyFactoryBean();
> 		factory.getInInterceptors().add(new LoggingInInterceptor());
> 		factory.getOutInterceptors().add(new LoggingOutInterceptor());
> 		factory.setServiceClass(UserService.class);
> 		factory.setAddress(cWSUserAddress);
> 		UserService lUserService = (UserService)factory.create();
> 		
> 		// make the call
> 		Users lUsers = lUserService.list();
> 		
> 		// check it
> 		org.fest.assertions.Assertions.assertThat( lUsers.getUser().size() ).isGreaterThan(0);
> 	}	
> The call arrives serverside, the code is correctly executed and 4 User entities have
been fetched from the database. The JAXB marshalling then runs into problems, resulting in
a value of null being returned on the clients side, and failing the unittest on a NPE.
> The trace:
> May 22, 2009 11:29:00 AM org.apache.cxf.interceptor.LoggingOutInterceptor$LoggingCallback
onClose
> INFO: Outbound Message
> ---------------------------
> ID: 2
> Address: http://localhost:9000/ws/user
> Encoding: UTF-8
> Content-Type: text/xml
> Headers: {SOAPAction=[""], Accept=[*/*]}
> Payload: <soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"><soap:Body><ns1:list
xmlns:ns1="http://services.profiler.knowledgeplaza.nl/" /></soap:Body></soap:Envelope>
> --------------------------------------
> [33299971@qtp-22864463-1] 2009-05-22 11:29:06,296 DEBUG nl.knowledgeplaza.profiler.services.UserServiceImpl.list(UserServiceImpl.java:48)
list User
> [EL Fine]: 2009-05-22 11:29:07.093--ServerSession(15545028)--Connection(13749345)--Thread(Thread[33299971@qtp-22864463-1,5,main])--SELECT
id, username, middlename, email, lastname, callname, firstname, version FROM KP_USER
> [33299971@qtp-22864463-1] 2009-05-22 11:29:08,750 DEBUG nl.knowledgeplaza.profiler.services.UserServiceImpl.list(UserServiceImpl.java:52)
list User size=4
> May 22, 2009 11:29:11 AM org.apache.cxf.phase.PhaseInterceptorChain doIntercept
> INFO: Interceptor has thrown exception, unwinding now
> org.apache.cxf.interceptor.Fault: Marshalling Error: class nl.knowledgeplaza.profiler.services.support.Users
nor any of its super class is known to this context.
> 	at org.apache.cxf.jaxb.JAXBEncoderDecoder.marshall(JAXBEncoderDecoder.java:159)
> 	at org.apache.cxf.jaxb.io.DataWriterImpl.write(DataWriterImpl.java:169)
> 	at org.apache.cxf.interceptor.AbstractOutDatabindingInterceptor.writeParts(AbstractOutDatabindingInterceptor.java:105)
> 	at org.apache.cxf.interceptor.BareOutInterceptor.handleMessage(BareOutInterceptor.java:68)
> 	at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:236)
> 	at org.apache.cxf.interceptor.OutgoingChainInterceptor.handleMessage(OutgoingChainInterceptor.java:74)
> 	at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:236)
> 	at org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:89)
> 	at org.apache.cxf.transport.http_jetty.JettyHTTPDestination.serviceRequest(JettyHTTPDestination.java:302)
> 	at org.apache.cxf.transport.http_jetty.JettyHTTPDestination.doService(JettyHTTPDestination.java:265)
> 	at org.apache.cxf.transport.http_jetty.JettyHTTPHandler.handle(JettyHTTPHandler.java:70)
> 	at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
> 	at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
> 	at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
> 	at org.mortbay.jetty.Server.handle(Server.java:324)
> 	at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:535)
> 	at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:880)
> 	at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:747)
> 	at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
> 	at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
> 	at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
> 	at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:520)
> Caused by: javax.xml.bind.MarshalException
>  - with linked exception:
> [javax.xml.bind.JAXBException: class nl.knowledgeplaza.profiler.services.support.Users
nor any of its super class is known to this context.]
> 	at com.sun.xml.bind.v2.runtime.MarshallerImpl.write(MarshallerImpl.java:328)
> 	at com.sun.xml.bind.v2.runtime.MarshallerImpl.marshal(MarshallerImpl.java:254)
> 	at javax.xml.bind.helpers.AbstractMarshallerImpl.marshal(AbstractMarshallerImpl.java:75)
> 	at org.apache.cxf.jaxb.JAXBEncoderDecoder.writeObject(JAXBEncoderDecoder.java:441)
> 	at org.apache.cxf.jaxb.JAXBEncoderDecoder.marshall(JAXBEncoderDecoder.java:138)
> 	... 21 more
> Caused by: javax.xml.bind.JAXBException: class nl.knowledgeplaza.profiler.services.support.Users
nor any of its super class is known to this context.
> 	at com.sun.xml.bind.v2.runtime.XMLSerializer.reportError(XMLSerializer.java:242)
> 	at com.sun.xml.bind.v2.runtime.XMLSerializer.reportError(XMLSerializer.java:257)
> 	at com.sun.xml.bind.v2.runtime.XMLSerializer.childAsXsiType(XMLSerializer.java:649)
> 	at com.sun.xml.bind.v2.runtime.ElementBeanInfoImpl$1.serializeBody(ElementBeanInfoImpl.java:151)
> 	at com.sun.xml.bind.v2.runtime.ElementBeanInfoImpl$1.serializeBody(ElementBeanInfoImpl.java:185)
> 	at com.sun.xml.bind.v2.runtime.ElementBeanInfoImpl.serializeBody(ElementBeanInfoImpl.java:305)
> 	at com.sun.xml.bind.v2.runtime.ElementBeanInfoImpl.serializeRoot(ElementBeanInfoImpl.java:312)
> 	at com.sun.xml.bind.v2.runtime.ElementBeanInfoImpl.serializeRoot(ElementBeanInfoImpl.java:71)
> 	at com.sun.xml.bind.v2.runtime.XMLSerializer.childAsRoot(XMLSerializer.java:490)
> 	at com.sun.xml.bind.v2.runtime.MarshallerImpl.write(MarshallerImpl.java:325)
> 	... 25 more
> Caused by: javax.xml.bind.JAXBException: class nl.knowledgeplaza.profiler.services.support.Users
nor any of its super class is known to this context.
> 	at com.sun.xml.bind.v2.runtime.JAXBContextImpl.getBeanInfo(JAXBContextImpl.java:566)
> 	at com.sun.xml.bind.v2.runtime.XMLSerializer.childAsXsiType(XMLSerializer.java:644)
> 	... 32 more
> May 22, 2009 11:29:12 AM org.apache.cxf.interceptor.LoggingInInterceptor logging
> INFO: Inbound Message
> ----------------------------
> ID: 2
> Encoding: UTF-8
> Content-Type: text/xml; charset=utf-8
> Headers: {content-type=[text/xml; charset=utf-8], Content-Length=[415], Server=[Jetty(6.1.15)]}
> Payload: <soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"><soap:Body><ns1:listResponse
xmlns:ns1="http://services.profiler.knowledgeplaza.nl/"><soap:Fault><faultcode>soap:Server</faultcode><faultstring>Marshalling
Error: class nl.knowledgeplaza.profiler.services.support.Users nor any of its super class
is known to this context.</faultstring></soap:Fault></ns1:listResponse></soap:Body></soap:Envelope>
> --------------------------------------
> The Users class is just a collection workaround as suggested in CXF's documentation:
> @XmlRootElement(name = "users")
> public class Users 
> implements Serializable
> {
> 	public Users() { setUser(new ArrayList<User>()); } // upon JAXB unmarshalling
of an empty collection, the setUser is NOT called and the collection would be null instead
of empty
> 	public Users(Collection<User> c) { setUser(c); }
> 	
> 	private Collection<User> iCollection;
> 	public Collection<User> getUser() { return iCollection; }
> 	public void setUser(Collection<User> c) { iCollection = c; }
>     
> 	public List<User> asList() { return new ArrayList<User>(iCollection); }
> }

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