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PO"Cannot find child element" error when calling JBoss Web Service from Visual FoxPro
 

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  1. PO"Cannot find child element" error when calling JBoss Web Service from Visual FoxPro
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    <p>I'm having this problem. I created a Web Service that runs on top of JBoss 5, using the Seam Framework. The web service has a single method called "login". When I consume the service from a Java client, it works fine, but when I try to consume from a Visual FoxPro client (my real need), I get an error message:</p> <pre><code>Error 1429 - OLE IDispatch exception code 0 from ?: Cannot find child element: username </code></pre> <p>The error stacktrace from JBoss:</p> <pre><code>12:02:32,396 ERROR [SOAPFaultHelperJAXWS] SOAP request exception org.jboss.ws.WSException: Cannot find child element: username at org.jboss.ws.core.CommonSOAPBinding.getParameterFromMessage(CommonSOAPBinding.java:917) at org.jboss.ws.core.CommonSOAPBinding.unbindRequestMessage(CommonSOAPBinding.java:361) at org.jboss.ws.core.server.ServiceEndpointInvoker.invoke(ServiceEndpointInvoker.java:197) at org.jboss.wsf.stack.jbws.RequestHandlerImpl.processRequest(RequestHandlerImpl.java:474) at org.jboss.wsf.stack.jbws.RequestHandlerImpl.handleRequest(RequestHandlerImpl.java:295) at org.jboss.wsf.stack.jbws.RequestHandlerImpl.doPost(RequestHandlerImpl.java:205) at org.jboss.wsf.stack.jbws.RequestHandlerImpl.handleHttpRequest(RequestHandlerImpl.java:131) at org.jboss.wsf.common.servlet.AbstractEndpointServlet.service(AbstractEndpointServlet.java:85) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:190) at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92) at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126) at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:598) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447) at java.lang.Thread.run(Unknown Source) </code></pre> <p>My web service class:</p> <pre><code>@Name("ServiceName") @WebService(name = "ServiceName", serviceName = "ServiceName") @SOAPBinding(style = SOAPBinding.Style.RPC) @Stateless public class ServiceName implements ServiceNameRemote { @WebMethod @Override public boolean login(@WebParam(name = "username") String username, @WebParam(name = "password") String password) { // logic.. return result; } } </code></pre> <p>The WSDL from <code>localhost:8080/app-app/ServiceName?wsdl</code></p> <pre><code>&lt;definitions name="ServiceName" targetNamespace="http://service.namespace/" xmlns="http://schemas.xmlsoap.org/wsdl/" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:tns="http://service.namespace/" xmlns:xsd="http://www.w3.org/2001/XMLSchema"&gt; &lt;types /&gt; &lt;message name="ServiceName_login"&gt; &lt;part name="username" type="xsd:string" /&gt; &lt;part name="password" type="xsd:string" /&gt; &lt;/message&gt; &lt;portType name="ServiceName"&gt; &lt;operation name="login" parameterOrder="username password"&gt; &lt;input message="tns:ServiceName_login" /&gt; &lt;output message="tns:ServiceName_loginResponse" /&gt; &lt;/operation&gt; &lt;/portType&gt; &lt;binding name="ServiceNameBinding" type="tns:ServiceName"&gt; &lt;soap:binding style="rpc" transport="http://schemas.xmlsoap.org/soap/http" /&gt; &lt;operation name="login"&gt; &lt;soap:operation soapAction="" /&gt; &lt;input&gt; &lt;soap:body namespace="http://service.namespace/" use="literal" /&gt; &lt;/input&gt; &lt;output&gt; &lt;soap:body namespace="http://service.namespace/" use="literal" /&gt; &lt;/output&gt; &lt;/operation&gt; &lt;/binding&gt; &lt;service name="ServiceName"&gt; &lt;port binding="tns:ServiceNameBinding" name="ServiceNamePort"&gt; &lt;soap:address location="http://localhost:8080/app-app/ServiceName" /&gt; &lt;/port&gt; &lt;/service&gt; &lt;/definitions&gt; </code></pre> <p>Client code (Using MS Soap Toolkit 3.0):</p> <pre><code>LOCAL loServiceNamePort AS "XML Web Service" * LOCAL loServiceNamePort AS "MSSOAP.SoapClient30" * Do not remove or alter following line. It is used to support IntelliSense for your XML Web service. *__VFPWSDef__: loServiceNamePort = http://localhost:8080/app-app/ServiceName?wsdl , ServiceName , ServiceNamePort LOCAL loException, lcErrorMsg, loWSHandler TRY loWSHandler = NEWOBJECT("WSHandler",IIF(VERSION(2)=0,"",HOME()+"FFC\")+"_ws3client.vcx") loServiceNamePort = loWSHandler.SetupClient("http://localhost:8080/app-app/ServiceName?wsdl", "ServiceName", "ServiceNamePort") * Call your XML Web service here. ex: leResult = loServiceNamePort.SomeMethod() MESSAGEBOX(loServiceNamePort.login("username", "password")) CATCH TO loException lcErrorMsg = "Error: "+TRANSFORM(loException.Errorno)+" - "+loException.Message DO CASE CASE VARTYPE(loServiceNamePort)#"O" * Handle SOAP error connecting to web service WAIT WINDOW "Error connecting to web service" NOWAIT CASE !EMPTY(loServiceNamePort.FaultCode) * Handle SOAP error calling method lcErrorMsg = lcErrorMsg + CHR(13) + loServiceNamePort.Detail WAIT WINDOW "SOAP error calling method" NOWAIT OTHERWISE * Handle other error ENDCASE * Use for debugging purposes MESSAGEBOX(lcErrorMsg) FINALLY ENDTRY </code></pre> <p>Client code (using PocketSOAP):</p> <pre><code>LOCAL loException, lcErrorMsg, loFactory, loProxy TRY loFactory = createObject("pocketsoap.Factory") loProxy = loFactory.CreateProxy("http://localhost:8080/app-app/ServiceName?wsdl", "http://service.namespace/") MESSAGEBOX(loProxy.login("username", "password")) CATCH TO loException lcErrorMsg = "Error: "+TRANSFORM(loException.Errorno)+" - "+loException.Message DO CASE CASE VARTYPE(loServiceNamePort)#"O" * Handle SOAP error connecting to web service WAIT WINDOW "Error connecting to web service" NOWAIT CASE !EMPTY(loServiceNamePort.FaultCode) * Handle SOAP error calling method lcErrorMsg = lcErrorMsg + CHR(13) + loServiceNamePort.Detail WAIT WINDOW "SOAP error calling method" NOWAIT OTHERWISE * Handle other error ENDCASE * Use for debugging purposes MESSAGEBOX(lcErrorMsg) FINALLY ENDTRY </code></pre> <p>I've been looking for an explanation as to why this happens, but haven't found it. I tried several things I found when googling: I added the namespace attribute with the corresponding value to the @WebParam annotations, added the @WebResult annotation with name and namespace, changed the SOAP binding from RPC to Document, all to no avail. Any help you can give me here is really appreciated.</p> <p><strong>EDIT</strong>: We ditched the SOAP services and now are using REST services, which we found easier to consume from Visual Fox, without the need for any bridge application.</p>
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