Shah, Soniya M. [RA] wrote:
1. Could message-based service have WSDL? Could we generate code based on WSDL like we do for RPC based? I would think that this is not the case as with document style you will have parse your own xml data. So all you would need to publish is the schema for your xml?
Yes it has a WSDL - infact it will likely have more XSD since you might be modeling the XML a little more.
Yes you can generate code from this new doc/lit WSDL. You can use WSDL2Java that ships with Axis or even customize your XML-Java marshaling with a custom serialization library like Castor or XMLBeans.
2. If you need attachements, is message based better approach or rpc? OR that does not matter as attachements are not part of SOAP XML?
Not sure on this.
3. Is performance better with message based? I read some articles indicating that it is.
This really depends. Performance can be hurt int he following areas:
1. Request message serialization - translate from Java/C# objects to XML.
2. Request Transfer - send/receiving the request XML
3. Request deserialization - parsing the XML on the server into XML and/or marshaling to Java/C# objects.
4. The service work itself
5. Response serialization - Java/C# objects to XML
6. Response Transfer - send/receive the response XML
7. Response deserialization - marshal the response XML to Java/C# objects
Whew. Its really tough to tell which one(s) of those steps dominates in your case. Notice that step #3 and 5 are soemwhat optional if you chose to process the XML directly so huge gains can be made there but at the expense of programming convenience - if you're not and XML wonk.
The practical areas that affect perf:
1. XML parsing - make a DOM vs. Stream (Sax) the XML. For large documents > 1MB perf drops off really fast if you make a DOM.
2. Message size - more XML = more time to transmit. But this is not as much of a problem as you'd think. For small messages its negligible.
Hope this Helps,
Jim Murphy Mindreef, Inc.
4. If your SOAP service needs to return some response, rpc based is better? In message based it is supported by HTTP protocol but is it just better to with rpc in this case?
Thanks,
Soniya
