This document discusses how to validate SOAP requests against an XSD schema file using a schema validation filter in Mule. The schema validation filter refers to XSD files to validate the SOAP request. If invalid, a custom error message is returned. The code example shows adding the schema validation filter to the flow and configuring it with the XSD schema location.

2. .

3. In simple words if we have the XSD file of
web service we can validate the request of
the web service against that XSD using a
schema validation filter in Mule..

4. Let’s see how…
Let consider we have a SOAP webs ervice exposed in Mule by
following way :-

5. Now, if we want to validate the request with an XSD file of the
web service and want to throw a custom message in case if the
SOAP request is invalid or incorrect, we need to use schema
validation filter

6. So after adding schema validation filter in our flow, our flow
looks like the following

7. We can also add a subflow which will throw custom message
if the SOAP request is invalid as follow :-

8. So, if we test the webservice with a wrong SOAP request in
SoapUI we will get a custom message :-

9. This is how the flow works:-

10. The code:-
You need to use schema validation filter which will refer to
your XSD files for validating a SOAP request as follows:-
The Schema Validation Filter uses the JAXP libraries to validate a message
against a schema. You must provide the path, file name, and extension of
the schema or schemas in the Schema Locations property.

11. A code snipped of the Mule config:-

12. To get the full code access for implementing a SOAP Request
validator in Mule, please visit :-
http://anirbansenchowdhary.com/blog/?p=131
You can also visit Mule documentation on Schema Validation
:-
http://www.mulesoft.org/documentation/display/current/
Schema+Validation+Filter