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Hi,
Can you check if your class com.mycompany.mysoapservice is getting
created and that method send is getting called or not.
What I could understand from your mail was that there is some problem
in locating the method or creating class.
Shashi Anand
-------Original Message-------
Date: Monday, May 20,
2002 10:55:38
Subject: Problem with
custom serializer
Hi all
Hope no-one minds me sending all this
information, but I've been stuck
on this for a couple of days now and
really need some help, so I've
included all the information I could
think would be useful in figuring
this one out...
I'm trying to
develop a custom (de)serializer for java objects that I
need to pass as
a parameter to a method on my SOAP service. When I run
my client, the
serializer works fine and posts the XML to the server.
However before
the deserializer on the server even gets to see the XML I
get this
horrible little NPE:
java.lang.NullPointerException
at
org.apache.soap.util.StringUtils.getClassName(StringUtils.java:90)
at
org.apache.soap.util.MethodUtils.callToString(MethodUtils.java:237)
at
org.apache.soap.util.MethodUtils.access$1(MethodUtils.java:72)
at
org.apache.soap.util.MethodUtils$MoreSpecific.getMostSpecific(MethodUtil
s.java:448)
at
org.apache.soap.util.MethodUtils.getEntryPoint(MethodUtils.java:183)
at
org.apache.soap.util.MethodUtils.getMethod(MethodUtils.java:548)
at
org.apache.soap.util.MethodUtils.getMethod(MethodUtils.java:528)
at
org.apache.soap.server.RPCRouter.invoke(RPCRouter.java:114)
at
org.apache.soap.providers.RPCJavaProvider.invoke(RPCJavaProvider.java:12
9)
at
org.apache.soap.server.http.RPCRouterServlet.doPost(RPCRouterServlet.jav
a:287)
grrrrrrr!
I stepped through the SOAP code and discovered
that is caused by an
empty array of Class[] argTypes in the MethodUtils
class. Now I am
assuming that means I have constructed my XML message
badly, but at that
point I run out of ideas. Although I do suspect that
it could have
something to do with the namespaces...
<clutches_straws/>
This is the XML that is generated by my
serializer:
<?xml version="1.0" encoding="UTF-8" ?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="
http://schemas.xmlsoap.org/soap/envelope/
<http://schemas.xmlsoap.org/soap/envelope/>
" xmlns:xsi="
http://www.w3.org/1999/XMLSchema-instance
<http://www.w3.org/1999/XMLSchema-instance>
" xmlns:xsd="
http://www.w3.org/1999/XMLSchema
<http://www.w3.org/1999/XMLSchema>
">
<SOAP-ENV:Body>
<ns1:send
xmlns:ns1="urn:xml-soap-commsgw" SOAP-ENV:encodingStyle="
http://schemas.xmlsoap.org/soap/encoding/
<http://schemas.xmlsoap.org/soap/encoding/>
">
<message xmlns:ns2="urn:commsgw" xsi:type="ns2:WapPush" />
</ns1:send>
</SOAP-ENV:Body>
</SOAP-ENV:Envelope>
Note that:
-
"urn:xml-soap-commsgw" is the ID of my SOAP service
- "send" is the
name of the method on my SOAP service that I am invoking
- "send"
takes a parameter of type "WapPush"
My serializer doesn't yet
populate all the data from my WapPush object
yet, which is why you can
see it is an empty XML node.
Here's the type mapping descriptor:
<isd:service xmlns:isd=" http://xml.apache.org/xml-soap/deployment
<http://xml.apache.org/xml-soap/deployment>
" id="urn:xml-soap-commsgw">
<isd:provider type="java"
scope="Application" methods="send">
<isd:java
class="com.mycompany.mysoapservice"/>
</isd:provider>
<isd:faultListener>org.apache.soap.server.DOMFaultListener</isd:faultLis
tener>
<isd:mappings>
<isd:map encodingStyle="
http://schemas.xmlsoap.org/soap/encoding/
<http://schemas.xmlsoap.org/soap/encoding/>
"
xmlns:x="urn:commsgw"
qname="x:WapPush"
javaType="com.mycompany.WapPushMessage"
java2XMLClassName="com.mycompany.DeliverableSerializer"
xml2JavaClassName="com.mycompany.DeliverableSerializer"/>
</isd:mappings>
</isd:service>
Here's a
snippet of the relevant client code:
// heres my custom object
that I'm trying to pass over
WapPushMessage msg = new
WAPPushMessage();
// heres my custom (de)serializer instance
DeliverableSerializer delSer = new DeliverableSerializer();
// the
rest is all the standard stuff
SOAPMappingRegistry smr = new
SOAPMappingRegistry();
smr.mapTypes(Constants.NS_URI_SOAP_ENC,new
QName("urn:commsgw",
"WapPush"),WapPushMessage.class, delSer, delSer);
Response r=null;
Call c=new Call();
Vector parameters = new
Vector();
c.setSOAPMappingRegistry(smr);
c.setTargetObjectURI
("urn:xml-soap-commsgw");
c.setMethodName ("send");
c.setEncodingStyleURI(Constants.NS_URI_SOAP_ENC);
parameters.addElement (new Parameter("message",
WapPushMessage.class,
msg, null));
c.setParams (parameters);
r
= c.invoke ( new URL(" http://
<http://>
"+host+":"+port+"/soap/servlet/rpcrouter"), "" );
And here is the marshall method from my serializer. Note that
it doesn't
currently do much:
public void marshall(String
inScopeEncStyle, Class javaType, Object
src,
Object context, Writer
sink, NSStack nsStack,
XMLJavaMappingRegistry xjmr, SOAPContext ctx)
throws IllegalArgumentException, IOException
{
nsStack.pushScope();
if(!(src instanceof Deliverable)){
throw
new IllegalArgumentException("Tried to pass a '"
+
src.getClass().toString() +
"' to
DeliverableSerializer");
}
Deliverable message = (Deliverable) src;
if (message ==
null)
{
SoapEncUtils.generateNullStructure(inScopeEncStyle,
javaType,
context,
sink,
nsStack,
xjmr);
}
else
{
SoapEncUtils.generateStructureHeader(inScopeEncStyle,
javaType,
context,
sink,
nsStack,
xjmr);
sink.write("</" + context + '>');
}
nsStack.popScope();
}
Whew! That was a mouthful. If anyone is still reading
this and has any
inkling of an idea as to what the problem could be,
I'll be immensely
grateful. Knowing me its probably an ommitted speech
mark or bracket
sonewhere...
Regards
Nick
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