Hi again,
After playing with a smaller prototype and following a number of red herrings
in the class loading area, the real problem turn out to be a bit different.
I hadn't put it in the sample code I sent in my first post to simplify, but the
web service implementation class is transactional like shown below, so it can
access the middle tier database.
With the full version of the prototype class (all the comments out), I get the
error message as before. With the comments in, it works fine...
Being transactional has never been an issue for the other web services we have
that follow the SEI model. Is this a known limitation for streaming web
services with CXF? Is there a workaround?
Thanks a lot for your help,
Monica
package prototype;
import java.io.Reader;
import java.io.StringReader;
//import javax.persistence.EntityManager;
//import javax.persistence.PersistenceContext;
import javax.xml.transform.Source;
import javax.xml.transform.stream.StreamSource;
import javax.xml.ws.Provider;
import javax.xml.ws.Service;
import javax.xml.ws.ServiceMode;
import javax.xml.ws.WebServiceProvider;
//import org.springframework.transaction.annotation.Transactional;
//@Transactional
@WebServiceProvider(portName="PrototypeProviderPort",
serviceName="PrototypeProviderService",
targetNamespace="http://prototype.streaming.com/";)
@ServiceMode(value=Service.Mode.PAYLOAD)
public class PrototypeStreamingWS implements Provider<Source>{
public PrototypeStreamingWS(){
}
// @PersistenceContext
// private EntityManager manager;
@Override
public Source invoke( Source request ){
System.out.println( "PrototypeStreamingWS: CALL INVOKE" );
// DatasourceBean ds = getDataSource( 1 );
Reader reader = new StringReader(
"<soapenv:Envelope
xmlns:soapenv=\"http://schemas.xmlsoap.org/soap/envelope/\"; " +
"xmlns:prot=\"http://prototype.streaming.com/\";>" +
"<soapenv:Header/><soapenv:Body><prot:prototypeStreamingResponse>" +
"<prot:presentation>Hi, I'm the streaming ws
PrototypeStreamingWS. DS Name:" +
//ds.getDatasource() +
"</prot:presentation>" +
"</prot:prototypeStreamingResponse></soapenv:Body></soapenv:Envelope>" );
StreamSource response = new StreamSource( reader );
return response;
}
// private DatasourceBean getDataSource( int dsId ){
// return manager.find( DatasourceBean.class, dsId );
// }
}
-----Original Message-----
From: Monica Ferrero [mailto:[email protected]]
Sent: 23 June 2009 12:00
To: [email protected]; Daniel Kulp
Subject: RE: Configuring streaming web services: error on the call to invoke
Hi!
I have migrated to 2.2.2 and changed my implementation to implement
Provider<Source> instead
public class PresentationServiceProviderImpl implements Provider<Source>{
public Source invoke( Source request ){
but that has just moved the error to the new signature.
I'll have to check *again* for class loading issues :( or try to work with a
smaller example and see if I can pin it down...
Thanks for the help,
Monica
org.apache.cxf.interceptor.Fault: object is not an instance of declaring class
while invoking public javax.xml.transform.Source
com.accelrys.lmqs.presentationservice.PresentationServiceProviderImpl.invoke(javax.xml.transform.Source)
with params [javax.xml.transform.dom.domsou...@127c743].
at
org.apache.cxf.service.invoker.AbstractInvoker.createFault(AbstractInvoker.java:152)
at
org.apache.cxf.jaxws.AbstractJAXWSMethodInvoker.createFault(AbstractJAXWSMethodInvoker.java:83)
at
org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:126)
at
org.apache.cxf.jaxws.JAXWSMethodInvoker.invoke(JAXWSMethodInvoker.java:55)
at
org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:68)
at
org.apache.cxf.interceptor.ServiceInvokerInterceptor$1.run(ServiceInvokerInterceptor.java:57)
[snip]
at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.IllegalArgumentException: object is not an instance of
declaring class
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.apache.cxf.service.invoker.AbstractInvoker.performInvocation(AbstractInvoker.java:166)
at
org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:82)
... 66 more
-----Original Message-----
From: Monica Ferrero [mailto:[email protected]]
Sent: 22 June 2009 21:49
To: Daniel Kulp; [email protected]
Subject: RE: Configuring streaming web services: error on the call to invoke
Thanks for the quick and helpful reply Dan.
I've had a look and there were a couple of extra copies of the StreamSource
class running around. I have removed those jars now but I'm still seeing the
same error. :( Pretty sure now that there is no more versions of it around as
I've checked every jar.
I have downloaded 2.2.2 and I'm in the process of migrating. Hopefully that
will help,
Monica
-----Original Message-----
From: Daniel Kulp [mailto:[email protected]]
Sent: 22 June 2009 19:48
To: [email protected]
Cc: Monica Ferrero
Subject: Re: Configuring streaming web services: error on the call to invoke
Well, two thoughts:
1)
> org.apache.cxf.interceptor.Fault: object is not an instance of declaring
> class while invoking public javax.xml.transform.stream.StreamSource
> com.aaa.bbb.presentationservice.PresentationServiceProviderImpl.invoke(java
>x.xml.transform.stream.StreamSource) with params
> [javax.xml.transform.stream.streamsou...@1f4a05d]. at
This SOUNDS like a classloader issuer as it sounds like the "StreamSource"
class being passed in is different than the StreamSource that is expected.
I'd look at classpaths and such and make sure their aren't multiple sources of
StreamSource classes.
2) Until you move up to 2.2.1 or 2.2.2, you aren't going to benefit from
using a StreamSource anyway. In fact, it will be really problematic as it
will go stream -> stax -> DOM -> stream for incoming and stream -> DOM -> stax
-> stream on the outgoing. For 2.2.2, the incoming stays the same, but
the outgoing will go directly stream -> stax -> stream. For 2.2.2, I'd
suggest changing the sig to just:
Provider<Source>
and you will end up with a DOMSource on the way in, and you can return a
StreamSource.
Dan
On Mon June 22 2009 1:50:40 pm Monica Ferrero wrote:
> Hello,
>
> I'm trying to change one of our web services to a streaming web service as
> it can generate quite a lot of data back. My prototype implementation looks
> something like this:
>
> import javax.xml.stream.XMLStreamReader;
> import javax.xml.transform.stream.StreamSource;
> import javax.xml.ws.Provider;
> import javax.xml.ws.Service;
> import javax.xml.ws.ServiceMode;
> import javax.xml.ws.WebServiceProvider;
>
> @WebServiceProvider(portName="PresentationServiceProviderPort",
> serviceName="PresentationServiceProviderService",
> targetNamespace="http://streamingps.bbb.aaa.com/";)
> @ServiceMode(value=Service.Mode.PAYLOAD)
> public class PresentationServiceProviderImpl implements
> Provider<StreamSource>{
>
> public PresentationServiceProviderImpl(){
> }
>
> @Override
> public StreamSource invoke( StreamSource request ){
>
> Map<String, String> parameters = parseRequest( request );
> ResultsReader reader = new ResultsReader();
> //Set the reader with the info from request
> [snip]
> StreamSource response = new StreamSource( reader );
> return response;
> }
>
> WSDL file looks something like this:
>
> <?xml version="1.0" encoding="utf-8"?>
> <?xml-stylesheet href="wsdlformatter-doc-lit.xsl" type="text/xsl"?>
> <wsdl:definitions xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/";
> xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/";
> xmlns:ps="http://streamingps.bbb.aaa.com/";
> xmlns:xsd="http://www.w3.org/2001/XMLSchema";
> name="PresentationServiceProviderService"
> targetNamespace="http://streamingps.bbb.aaa.com/";>
>
> <!-- TYPES -->
> <wsdl:types>
> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema";
> xmlns:ps="http://streamingps.bbb.aaa.com/";
> attributeFormDefault="unqualified"
> elementFormDefault="qualified"
> targetNamespace="http://streamingps.bbb.aaa.com/";>
>
> [SNIP]
> <xs:element name="streamingQB" type="ps:streamingQB"/>
> <xs:complexType name="streamingQB">
> <xs:sequence>
> <xs:element minOccurs="1" maxOccurs="1"
> name="queryDefinition" type="xs:string" /> [SNIP]
> </xs:sequence>
> </xs:complexType>
>
> <xs:element name="streamingQBResponse"
> type="ps:streamingQBResponse"/> <xs:complexType name="streamingQBResponse">
> <xs:sequence>
> <xs:element minOccurs="0" name="Presentation"
> type="xs:string"/> </xs:sequence>
> </xs:complexType>
> </xs:schema>
> </wsdl:types>
>
> <!-- MESSAGES -->
> <wsdl:message name="streamingQB">
> <wsdl:part element="ps:streamingQB" name="parameters"/>
> </wsdl:message>
> <wsdl:message name="streamingQBResponse">
> <wsdl:part element="ps:streamingQBResponse" name="parameters"/>
> </wsdl:message>
>
> <!-- PORT TYPE OPERATIONS -->
> <wsdl:portType name="PresentationServiceProvider">
> <wsdl:operation name="streamingQB">
> <wsdl:input message="ps:streamingQB" name="streamingQB"/>
> <wsdl:output message="ps:streamingQBResponse"
> name="streamingQBResponse"/> <wsdl:fault
> message="ps:PresentationServiceException" name="fault"/> </wsdl:operation>
> </wsdl:portType>
>
> <!-- BINDING OPERATIONS -->
> <wsdl:binding name="PresentationServiceProviderServiceSoapBinding"
> type="ps:PresentationServiceProvider"> <soap:binding style="document"
> transport="http://schemas.xmlsoap.org/soap/http"/> <wsdl:operation
> name="streamingQB">
> <soap:operation soapAction="" style="document"/>
> <wsdl:input name="streamingQB"><soap:body
> use="literal"/></wsdl:input> <wsdl:output
> name="streamingQBResponse"><soap:body use="literal"/></wsdl:output>
> <wsdl:fault name="fault"><soap:fault name="fault"
> use="literal"/></wsdl:fault> </wsdl:operation>
> </wsdl:binding>
>
> <!-- WEB SERVICE -->
> <wsdl:service name="PresentationServiceProviderService">
> <wsdl:port
> binding="ps:PresentationServiceProviderServiceSoapBinding"
> name="PresentationServiceProviderPort"> <soap:address
> location="http://localhost:9944/services/ws/PresentationServiceProvider"/>
> </wsdl:port>
> </wsdl:service>
>
> </wsdl:definitions>
>
>
> In the beans.xml for the Spring configuration I've tried a number of
> things, but it looks like this currently:
>
> <jaxws:endpoint id="PresentationServiceProvider"
> implementor="#presentationProviderService"
> endpointName="e:PresentationServiceProviderPort"
> serviceName="s:PresentationServiceProviderService"
> address="/PresentationServiceProvider"
> xmlns:e="http://service.jaxws.cxf.apache.org/endpoint";
> xmlns:s="http://service.jaxws.cxf.apache.org/service"/>
>
>
> This is the error I get:
>
> 22-Jun-2009 17:02:49 org.apache.cxf.interceptor.LoggingInInterceptor
> logging INFO: Inbound Message
> ----------------------------
> Encoding: UTF-8
> Headers: {content-type=[text/xml;charset=UTF-8], Max-Forwards=[10],
> host=[localhost:9944], Authorization=[Basic xxx], content-length=[908],
> X-AuthenticatedUser=[mferrero], SOAPAction=[""], user-agent=[Jakarta
> Commons-HttpClient/3.0.1], X-AuthenticatedSID=[xxx]} Messages:
> Message:
>
> Payload: <soapenv:Envelope
> xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/";
> xmlns:str="http://streamingps.bbb.aaa.com/";>
> <soapenv:Header/>
> <soapenv:Body>
> <str:streamingQB>
> <str:queryDefinition><![CDATA[--query--]]></str:queryDefinition>
> <str:datasourceId>1</str:datasourceId>
> </str:streamingQB>
> </soapenv:Body>
> </soapenv:Envelope>
> --------------------------------------
> 22-Jun-2009 17:02:49 org.apache.cxf.phase.PhaseInterceptorChain doIntercept
> INFO: Application has thrown exception, unwinding now
> org.apache.cxf.interceptor.Fault: object is not an instance of declaring
> class while invoking public javax.xml.transform.stream.StreamSource
> com.aaa.bbb.presentationservice.PresentationServiceProviderImpl.invoke(java
>x.xml.transform.stream.StreamSource) with params
> [javax.xml.transform.stream.streamsou...@1f4a05d]. at
> org.apache.cxf.service.invoker.AbstractInvoker.createFault(AbstractInvoker.
>java:112) at
> org.apache.cxf.jaxws.JAXWSMethodInvoker.createFault(JAXWSMethodInvoker.java
>:86) at
> org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:
>104) at
> org.apache.cxf.jaxws.JAXWSMethodInvoker.invoke(JAXWSMethodInvoker.java:110)
> at
> org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:
>68) at
> org.apache.cxf.interceptor.ServiceInvokerInterceptor$1.run(ServiceInvokerIn
>terceptor.java:56) at
> org.apache.cxf.workqueue.SynchronousExecutor.execute(SynchronousExecutor.ja
>va:37) at
> org.apache.cxf.interceptor.ServiceInvokerInterceptor.handleMessage(ServiceI
>nvokerInterceptor.java:92) at
> org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChai
>n.java:221) at
> org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationO
>bserver.java:77) at
> org.apache.cxf.transport.servlet.ServletDestination.invoke(ServletDestinati
>on.java:92) at
> org.apache.cxf.transport.servlet.ServletController.invokeDestination(Servle
>tController.java:214) at
> org.apache.cxf.transport.servlet.ServletController.invoke(ServletController
>.java:151) at
> org.apache.cxf.transport.servlet.AbstractCXFServlet.invoke(AbstractCXFServl
>et.java:170) at
> org.apache.cxf.transport.servlet.AbstractCXFServlet.doPost(AbstractCXFServl
>et.java:148) [snip]
> at java.lang.Thread.run(Thread.java:619)
> Caused by: java.lang.IllegalArgumentException: object is not an instance of
> declaring class at sun.reflect.NativeMethodAccessorImpl.invoke0(Native
> Method) at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:3
>9) at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImp
>l.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at
> org.apache.cxf.service.invoker.AbstractInvoker.performInvocation(AbstractIn
>voker.java:127) at
> org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:
>82) ... 63 more
>
> It seems to me that something is wrong with the configuration and that
> somehow CXF is processing the message instead of passing it to the low
> level provider. Is there anything else I need to do to configure a
> Provider? I've struggle to find information/examples in Nabble or the
> website. At the moment we are running CXF 2.0.6.
>
> Thanks a lot for your help,
>
> Monica
>
> ________________________________
> Accelrys Limited (http://accelrys.com)
> Registered office: 334 Cambridge Science Park, Cambridge, CB4 0WN, UK
> Registered in England: 2326316
--
Daniel Kulp
[email protected]
http://www.dankulp.com/blog
Accelrys Limited (http://accelrys.com)
Registered office: 334 Cambridge Science Park, Cambridge, CB4 0WN, UK
Registered in England: 2326316
Accelrys Limited (http://accelrys.com)
Registered office: 334 Cambridge Science Park, Cambridge, CB4 0WN, UK
Registered in England: 2326316
Accelrys Limited (http://accelrys.com)
Registered office: 334 Cambridge Science Park, Cambridge, CB4 0WN, UK
Registered in England: 2326316
