Axis2 Web Service Client Generation - Types without modifying the client

Question

Is it possible with Axis2 and Eclipse to generate a Web Service client and have it use java types that you already have in packages instead of creating it's own types. Reason being of course if I have type A already created and it creates it's own Type A I can't just assign variable of type A to variable of type B.

The wsdl is being generated from a Web Service deployed to an application server. If it's not possible to generate it from that would it be possible to generate a client from the already existing java files.

Answer 1

You are generating the web service client from wsdl, correct?

The only thing that the wsdl2java tool knows about is the information in the wsdl, so it won't know about any types that you have already created.

If you can get the type information into the wsdl you may get it to work, although I have never tried.

If you want an easy way to copy from Type A to Type B then you could try BeanUtils.copyProperties, as long as the setters and getters of Type A and Type B match.

Answer 2

If you really want to reuse existing classes, you can call the Axis2 API directly without generating a client using wsdl2java. Below is some relatively simple code to call a web service. You just need to fill in the web service endpoint, method QName, expected return Class(es), and arguments to the service. You could reuse your existing classes as the return values or arguments.

If your web service is pretty complicated then you may find that you have to go deeper into the API to get this approach to work.

serviceClient = new RPCServiceClient();
Options options = serviceClient.getOptions();

EndpointReference targetEPR = new EndpointReference("http://myservice");

options.setTo(targetEPR);

QName methodName = new QName("ns","methodName");

Class<?>[] returnTypes = new Class[] { String.class };

Object[] args = new Object[] { "parameter" };

Object[] response = serviceClient.invokeBlocking(methodName, args,
                returnTypes);

Answer 3

If you use eclipse as your ide, that is waht you need: http://www.eclipse.org/webtools/. It does beyond other things exactly what you want.

Answer 4

You can directly use ServiceClient class to call web service, which provides call using XML only and returns XML response. For different methods of web service, you have to convert the XML response to some java POJO to use it. Only Response handling needs to be done at your end. that you can do like from XML to Map etc...

So you won't need any other stub classes to call any web service, only needs to handle response XML. You can convert XML to POJO using Castor or JAXB libs.

This is the way you don't need to modify your client every time for diff. web services. You can develop like providing a response handler to client externally. So that for every different web service you will have diff. response handler class which is implementation of you interface.

//common interface for response handlers...
//implement this for diff. web service/methods
public interface WSRespHandler{
    public Object getMeResp(Object respData);
}


//pass particular handler to client when you call some WS
public class WebServiceClient {
    public Object getResp(WSRespHandler respHandler) {
        ..

        return repHandler.getMeResp(xmlData);
    }
}

reference:

http://www.developer.com/java/web/article.php/3863416/Using-Axis2-and-Java-for-Asynchronous-Web-Service-Invocation-on-the-Client-Side.htm

http://www.devdaily.com/blog/post/java/java-web-service-client-read-array-list/

thanks.

www.techlads.com