Exception when creating XMLStreamReader from AxiomSoapMessage.getPayloadSource with Woodstox [SWS-99]

[gregturn]

Tareq Abedrabbo opened SWS-99 and commented

I'm trying to create a javax.xml.stream.XMLStreamReader from WebServiceMessage.getPayloadSource(). I'm using Axiom to create web service messages and Woodstox as a StaX parser. The following code is throwing the following exception with Axiom but works fine with Saaj:
javax.xml.stream.XMLStreamException: Can not create StAX reader for the Source passed -- neither reader, input stream nor system id was accessible; can not use other types of sources (like embedded SAX streams)

XMLInputFactory inputFactory = XMLInputFactory.newInstance();
XMLStreamReader parser = inputFactory.createXMLStreamReader(message.getPayloadSource());

To reproduce the exception, modify the echo sample as follows:
1- Add Axiom jars to the classpath
2- Add Woodstox to the classpath
3- Add <bean id="messageFactory" class="org.springframework.ws.soap.axiom.AxiomSoapMessageFactory"/> to spring-ws-servlet.xml
4- Add the following endpoint interceptor:

package org.springframework.ws.samples.echo.ws;

import javax.xml.stream.XMLInputFactory;
import javax.xml.stream.XMLStreamReader;

import org.springframework.ws.WebServiceMessage;
import org.springframework.ws.context.MessageContext;
import org.springframework.ws.server.EndpointInterceptor;

public class StaxEndpointInterceptor implements EndpointInterceptor {

public boolean handleRequest(MessageContext messageContext, Object endpoint)
		throws Exception {
	WebServiceMessage message = messageContext.getRequest();
	XMLInputFactory inputFactory = XMLInputFactory.newInstance();
	XMLStreamReader parser = inputFactory.createXMLStreamReader(message.getPayloadSource());
	return true;
}

public boolean handleResponse(MessageContext messageContext, Object endpoint)
		throws Exception {
	return true;
}

}

5 - configure it in spring-ws-servlet.xml:
<bean id="staxEndpointInterceptor" class="org.springframework.ws.samples.echo.ws.StaxEndpointInterceptor"/>
and
<ref local="staxEndpointInterceptor"/>

Calling echo now will throw the following exception:

javax.xml.stream.XMLStreamException: Can not create StAX reader for the Source passed -- neither reader, input stream nor system id was accessible; can not use other types of sources (like embedded SAX streams)
at com.ctc.wstx.stax.WstxInputFactory.createSR(WstxInputFactory.java:756)
at com.ctc.wstx.stax.WstxInputFactory.createXMLStreamReader(WstxInputFactory.java:329)
at org.springframework.ws.samples.echo.ws.StaxEndpointInterceptor.handleRequest(StaxEndpointInterceptor.java:16)
at org.springframework.ws.server.MessageDispatcher.dispatch(MessageDispatcher.java:197)
at org.springframework.ws.server.MessageDispatcher.receive(MessageDispatcher.java:166)
at org.springframework.ws.transport.support.WebServiceMessageReceiverObjectSupport.handle(WebServiceMessageReceiverObjectSupport.java:78)
at org.springframework.ws.transport.http.WebServiceMessageReceiverHandlerAdapter.handle(WebServiceMessageReceiverHandlerAdapter.java:60)
at org.springframework.ws.transport.http.MessageDispatcherServlet.doService(MessageDispatcherServlet.java:125)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:396)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:360)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Unknown Source)

---

Affects: 1.0 M3

Attachments:

• StaxEndpointInterceptor.java (843 bytes)

[gregturn]

Arjen Poutsma commented

Unfortunately, I cannot fix this, since it is Woodstox issue rather than a SWS issue. Woodstox can only handle StreamSource implementations, or SAXSource implementations that have a proper InputSource (i.e. either InputStream or Writer must be set).

A common trick while dealing with StAX and TrAX is to create a "fake" SAXSource that has its own custom XMLReader and an empty InputSource. Reading from the XMLReader will result in a read from the underlying XMLStreamReader or XMLEventReader. Look at org.springframework.xml.transform.StaxSource to see how this is done.

Woodstox cannot deal with this trick, so I have another one up my sleeve: create a buffer, write the source to that buffer, and read from that (see org.springframework.ws.server.endpoint.AbstractStaxStreamPayloadEndpoint#getStreamReader(Source)). Slow, but it works.

[gregturn]

Arjen Poutsma commented

Closing RC1 issues.