Hi All,
I have a problem with a SOAP invocation of an ATL COM
object which I have deployed (I feel imperfectly on
the Apache SOAP Server.
I however, do not have any problems with my other
deployed SOAP WebServices at the same SOAP RPCRouter
URL...........
The SOAP Response returns a text/html format error as
the Apache Xerces DOMWriter/DOMFaultListener is not
happy with the format of the SOAP ENV� more
importantly both the Java SOAP Client and the Apache
SOAP Server complain about a �NullPointerReference�.
This leads me more to believe that it basically is a
problem with the way I have registered the SOAP
WebService using the XML deployment Descriptor.
I could not find anyone better source than here to
follow this line of enquiry to possible programmatic
success.
In the meantime, I have sparingly tried something with
the ATL COM DLL which I thought I may report to you:
i) First up, I don�t think that I have registered the
ATL COM DLL properly with the SOAP Server. I need a
proper way of naming the Object (preferably a fully
qualified name); this can be noted in the XML file
which is used as a deployment descriptor for the SOAP
WebService . To extrapolate an earlier experience with
Microsoft based COM DLLs { what I had done with the
Visual Basic COM DLL } -> I had to register the
Project Name and the Class Module name in the VB COM
DLL SOAP WebService Deployment Descriptor(XML file
again) .I need the �progid� value (please note the
relevant portions under). Could you guide me in this
regard??
********************
Visual Basic COM DLL
********************
<!--Apache SOAP specific deployment descriptor (ie
loads this service into Apache SOAP.-->
<isd:service
xmlns:isd="http://xml.apache.org/xml-soap/deployment";
id="urn:demo:hello">
<isd:provider
type="org.apache.soap.providers.com.RPCProvider"
scope="Application"
methods="Hello">
<isd:java class="required not needed for
COMProvider"/>
<isd:option key="progid" value="Project1.Class1"
/>
</isd:provider>
<isd:faultListener>org.apache.soap.server.DOMFaultListener</isd:faultListener>
</isd:service>
**********************
Visual C++ ATL Com DLL
**********************
<!--Apache SOAP specific deployment descriptor (ie
loads this service into Apache SOAP.-->
<isd:service
xmlns:isd="http://xml.apache.org/xml-soap/deployment";
id="urn:demo:ATL">
<isd:provider
type="org.apache.soap.providers.com.RPCProvider"
scope="Application" methods="DllMain">
<isd:java class="required not needed for
COMProvider"/>
<isd:option key="progid"
value="Day1Server.MyFirstATLObject" />
<!-- <isd:option key="threadmodel"
value="SINGLEAPARTMENTTHREADED" />
<isd:option key="threadmodel"
value="APARTMENTTHREADED" />
<isd:option key="threadmodel"
value="MULTITHREADED" />
-->
<isd:option key="threadmodel"
value="APARTMENTTHREADED" />
</isd:provider>
<isd:faultListener>
org.apache.soap.server.DOMFaultListener
</isd:faultListener>
</isd:service>
ii) Next, I was able to register an ATL COM DLL which
is not using a BSTR (tried int*, char*�successfully
with minor though �telling� code tweaking), but the
STL Registration process requires that a pointer be
used due to the constraints imposed by the �atl.h�
header file (standard) � btw can we change this header
so that it accepts non-pointer based datatypes? (I
foresee that there might be more code other than the
header which we may need to update in the �Microsoft�
implementation of ATL).
iii) Further, I was considering the reverse approach
-> ATL COM Client to non-Microsoft SOAP WebService,
say, Java.
iv) As of time=now, I haven�t tried testing a separate
box(computer)->>[ Client on one box and server on
another box ] scenario (memory heap allocation problem
possibly??)
v) Also, Java handles BSTR; it refers to it as
BinaryString!
To conclude, IMHO, I feel that the Java
NullPointerException is being thrown mainly due to the
fact that the fully qualified object name is not
available.
Please respond ASAP.
Sincerely,
<->{ R2D2 }<->
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