Hi,
In my project, we intend to use Axis 1.1 with Castor to develop and deploy web services. We were doing some prototyping with Axis & Castor, but ran into a few issues which we need to solve before we can go ahead. Kindly find the details below and let me know if there are any solutions for any of the mentioned issues.
Requirement
To setup a single Web service with four operations (CRUD), listening on a Axis engine
Development environment being used
Windows XP, WSAD 5.0, Apache Axis 1.1, Castor-0.9.5.2
Procedure Followed
Firstly, we integrated WSAD with Axis. Developed WSDL and XSD files and provided them as input to Axis’ WSDL2java tool. To integrate Axis with Castor for data binding, made the necessary changes to accommodate Castor serializers and deserializers in the Stub and deploy.wsdd , and then deployed the service in the WSAD Test environment
Major Issue being faced
§ Axis’ Document type web service support is immature. Incorrect method invocation seems to take place while using document style in WSDL. We deployed a web service with updateOperatorProfile() and createOperatorProfile() methods. Through a Test client, when we invoked updateOperatorProfile(), somehow the createOperatorProfile() was being invoked instead of updateOperatorProfile(). On investigation, the reason for this seems to be that the operation to be invoked is NOT selected on the basis of ‘qname of the operation’ but selected on the basis of ‘qname of input parameters’. As for these two methods the input parameter is same (also having same qname), the operation which is defined first in the descriptor file gets invoked by default.
Other Issues Faced :
§ Axis generated stub and deploy.wsdd contains stray elements and characters and this used to cause errors at runtime. In the stub constructor, when a QName was being instantiated, we found a “>” character just before the element name. In the deploy.wsdd, we found a “>” character in the value of the qname attribute of the <typeMapping> element.
§ Castor does not generate Java classes for <xsd:simpleType/> present in the XML schemas, only Axis does. Looks like Castor does not have support in terms of serializers/deserializers for <xsd:simpleType/>
§ Data Binding classes generated by Axis and Castor for the same XML schema have different names and this creates confusion. Axis generated class names start with a underscore character(for eg _AdminGroups) whereas Castor generated files do not start with underscore (AdminGroups)
§ Both Axis and Castor (for XML <simpleType> and <complexType> respectively) generated data types needed to be used for serializing & deserializing types and this adds to the confusion
What we are looking for
§ Robust support by Axis for document style web services
§ Any suggestions or guidelines for a better integration experience between Axis and Castor
Regards,
Manoj Nandakumar
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