I have attached code samples to the bottom. I am resending bc I did not see
my earlier message show up on the archives. I am using the following
environment
java 1.4
Tomcat 4.0.3
Soap 2.3
Xerces 1.4.4
I have written a simple class that implements not only the class functions,
but the serialization and deserialization as well. I am having problems
calling a simple function on the class that returns itself. Right now the
class has only one member (a string) and thus the marshall and unmarshall
functions are responsible for handling just that member. When a client
calls the function, apache tomcat loads the constructor, calls the function,
but never calls the marshall function (as reported through the apache
console). The only thing returned to the client is
Fault Code = SOAP-ENV:Server
Fault String = java.lang.NullPointerException
Does anyone have any ideas? I've gotten the simple soap examples to run
just fine. (And subsequently my code and descriptor are pretty identical)
It's pretty weird because I know that the marshall/unmarshall methods are
never being accessed by the server. The exception is being thrown at
(RPCJavaProvider.java:138) which seems to me that it can't find a reference
to my (de)serializer.
Another question: the only reference to the class GuideSerializer that is
made is at the client while building the call. Is this correct? Do I need
to somehow map GuideSerializer to the type Guide in the
DeploymentDescriptor???
Thanks,
Todd D. Johnson
Implementing server class:
public Guide getSampleGuide(int guideSeq){
System.out.println("Guide.getSampleGuide called");
setGuideName("Sample Tickler Guide");
//g.setGuideType("DefaultGuidePublishingAgentImpl");
System.out.println("Guide.getSampleGuide exiting");
return this;
}
DeploymentDescriptor:
<isd:service xmlns:isd="http://xml.apache.org/xml-soap/deployment";
id="urn:tickler">
<isd:provider type="java" scope="Request" methods="getSampleGuide">
<isd:java class="com.salarinc.tickler.foundation.Guide"
static="false"/>
</isd:provider>
<isd:faultListener>org.apache.soap.server.DOMFaultListener</isd:faultListene
r>
<isd:mappings>
<isd:map encodingStyle="http://schemas.xmlsoap.org/soap/encoding/";
xmlns:x="urn:tickler-guide" qname="x:guide"
javaType="com.salarinc.tickler.foundation.Guide"
java2XMLClassName="org.apache.soap.encoding.soapenc.BeanSerializer"
xml2JavaClassName="org.apache.soap.encoding.soapenc.BeanSerializer"/>
</isd:mappings>
</isd:service>
Client code:
Integer x=new Integer(7);
Integer y=new Integer(8);
final String urn= "urn:tickler";
Vector params = new Vector();
URL url = null;
try{
url = new URL("http://"; + serverhost + ":" + serverport+
soapservlet);
}catch(java.net.MalformedURLException e){
System.out.println("Error creating a url: "+e.getMessage());
}
ServiceManagerClient client = new ServiceManagerClient(url);
try{
String[] apps = client.list();
System.out.println("Deployed Services at "+url.toString()+"
are:");
for(int i = 0; i < apps.length; i++){
System.out.println("\t"+apps[i]);
DeploymentDescriptor desc = client.query(apps[i]);
System.out.println("\t\tMethods for
"+desc.getScriptFilenameOrString()+" are:");
String[] methods = desc.getMethods();
for(int j = 0; j < methods.length; j++){
System.out.println("\t\t\t"+methods[j]);
}
}
}catch(SOAPException e){
System.out.println("Could not connect to ServiceManager at
"+url.toString()+": "+e.getMessage());
}
// Build the call.
Call call = new Call();
SOAPHTTPConnection shc = new SOAPHTTPConnection ();
shc.setMaintainSession (true);
call.setSOAPTransport(shc);
call.setTargetObjectURI(urn);
call.setEncodingStyleURI("http://schemas.xmlsoap.org/soap/encoding/";);
call.setMethodName("getSampleGuide");
params.addElement(new Parameter("guideSeq" , Integer.class, new
Integer(7), null));
call.setParams(params);
GuideSerializer ser_0 = new GuideSerializer();
SOAPMappingRegistry smr = call.getSOAPMappingRegistry();
smr.mapTypes("http://schemas.xmlsoap.org/soap/encoding/";, new QName(
"urn:tickler-guide", "guide"), Guide.class, ser_0, ser_0);
call.setSOAPMappingRegistry(smr);
Response resp = null;
try{
resp = call.invoke(url,"");
}catch(org.apache.soap.SOAPException e){
System.out.println("Got a soap exception while invoking
"+e.getMessage());
System.exit(1);
}
if (resp.generatedFault()) {
Fault fault = resp.getFault();
System.out.println("Ouch, the call failed: ");
System.out.println(" Fault Code = " + fault.getFaultCode());
System.out.println(" Fault String = " +
fault.getFaultString());
} else {
Parameter result = resp.getReturnValue();
if(result.getType() == Guide.class){
Guide g = (Guide)result.getValue();
System.out.println("The guide name is " + g.getGuideName());
}else{
System.out.println("ERROR server returned a
:"+result.getType().toString());
System.exit(1);
}
}
Serializer/Deserializer
public Bean unmarshall(String inScopeEncStyle, QName elementType,
Node src, XMLJavaMappingRegistry xjmr, SOAPContext ctx)
throws IllegalArgumentException
{
Element root = (Element)src;
Element tempEl = DOMUtils.getFirstChildElement(root);
Guide target;
try
{
target =
(Guide)Guide.class.newInstance
();
}
catch (Exception e)
{
throw new IllegalArgumentException("Problem instantiating bean: "
+ e.getMessage());
}
while (tempEl != null)
{
Bean paramBean = xjmr.unmarshall(inScopeEncStyle,
RPCConstants.Q_ELEM_PARAMETER,
tempEl, ctx);
Parameter param = (Parameter)paramBean.value;
String tagName = tempEl.getTagName();
if (tagName.equals("name"))
{
target.setGuideName((java.lang.String)param.getValue());
}
tempEl = DOMUtils.getNextSiblingElement(tempEl);
}
return new Bean(Guide.class, target);
}
public void marshall(String inScopeEncStyle, Class javaType,
Object src, Object context, Writer sink,
NSStack nsStack, XMLJavaMappingRegistry xjmr, SOAPContext ctx)
throws IllegalArgumentException, IOException
{
nsStack.pushScope();
SoapEncUtils.generateStructureHeader(inScopeEncStyle, javaType,
context,
sink, nsStack, xjmr);
sink.write(StringUtils.lineSeparator);
Guide src2 = (Guide)src;
Parameter param;
param = new Parameter("namme", String.class, new String
("Test"), null);
xjmr.marshall(inScopeEncStyle, Parameter.class, param, null,
sink, nsStack, ctx);
sink.write(StringUtils.lineSeparator);
sink.write("</" + context + '>');
nsStack.popScope();
}
server gunk:
</SHTTP/1.1 500 Internal Server Error Content-Type: text/xml; charset=utf-8
Content-Length: 3369 Date: Mon, 10 Jun 2002 14:24:09 GMT Server: Apache
Tomcat/4.0.2 (HTTP/1.1 Connector) Set-Cookie:
JSESSIONID=4F9E94EB66517ADC4DEAD0E2AE6E5966;Pa<?xml version='1.0'
encoding='UTF-8'?> <SOAP-ENV:Envelope
xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xmlns:xsd="http://www.w3.org/2001/XMLSchema";> <SOAP-ENV:Body>
<SOAP-ENV:Fault> <faultcode>SOAP-ENV:Server</faultcode>
<faultstring>java.lang.NullPointerException</faultstring>
<faultactor>/soap/servlet/rpcrouter</faultactor> <detail>
<stackTrace>[SOAPException: faultCode=SOAP-ENV:Server;
msg=java.lang.NullPointerException] at
org.apache.soap.providers.RPCJavaProvider.invoke(RPCJavaProvider.java:138)
at
org.apache.soap.server.http.RPCRouterServlet.doPost(RPCRouterServlet.java:35
4) at javax.servlet.http.HttpServlet.service(HttpServlet.java:760) at
javax.servlet.http.HttpServlet.service(HttpServlet.java:853) at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
FilterChain.java:247) at
org.apache.catalina.core.ApplicationFilterChain.doFilter(Applicat
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.ja
va:243) at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
66) at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.ja
va:190) at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
66) at
org.apache.catalina.valves.CertificatesValve.invoke(CertificatesValve.java:2
46) at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
64) at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2343)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180
) at org.ndardPipeline.invokeNext(StandardPipeline.java:566) at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.
java:170) at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
64) at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170
) at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
64) at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:468)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
64) at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943) at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java
:174) at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:5
66) at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.CainerBase.java:943) at
org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:
1012) at
org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1107
) at java.lang.Thread.run(Thread.java:536) </stackTrace> </detail>
</SOAP-ENV:Fault>
