Basic of a web service client

[Jayavardhan geepi]

Hi,
I'm a novice to web services. I searched a lot for it in internet and It wasn't helpful. So I'm posting it here hoping for replies.

I've written a web service. While writing client to test that, I came to know that , first step is to generate stubs using wsimport tool which takes a URL.

My question is what that URL points to .? http://localhost:8080/myApp/myWebService?wsdl.

How to deploy a web service ? I know concepts but, unable to execute those in programs.
Can someone please help me. Appreciate the detailed answer.

Thanks and Regards,
jayavardhan

[Jayavardhan geepi]

Example of a client with code and explanation is really helpful.

thanks

[William Brogden]

What toolkit did you use for creating this web service?

The ones I am familiar with always come with worked out examples of client code.

Bill

[Ivan Krizsan]

Hi!
There are quite a few web service tutorials available here: http://netbeans.org/kb/trails/web.html
Both for web service and web service client development.
Best wishes!

[Jayavardhan geepi]

Hi.. Thanks for reply.

I'm using eclipse for this with tomcat server and client in jboss.

I got 2 questions here.
In the wsdlLocation - like "http://localhost:8070/MyApp/HelloService?wsdl " , the /HelloService is mapped to some apache axis servlet. What is that? This mapping is generated by eclipse itself.


I'm able to view wsdl file with the above mentioned url.
I have generated proxy using wsimport.

I have written one more web app(client) to test the service. In that I have a servlet with goGet() method. Also I have given @WebServiceRef(wsdlLocation="http://localhost:8070/MyApp/HelloService?wsdl").

But I got null pointer exception while testing. i.e the service annotated with @WebServiceRef was null.

I'm more interested in knowing about the servlet that was mapped to '/HelloService'.



Thanks and Regards,
J

[Alpha Omega]

If i were you, I would just use JAX-WS RI (Reference Implementation) which comes in built with JDK 6.

Below is some sample code from Java Webservices: Up and running book

----------- Service Endpoint Interface ---------

package alpha.omega;

import javax.jws.WebService;
import javax.jws.WebMethod;
import javax.jws.soap.SOAPBinding;
import javax.jws.soap.SOAPBinding.Style;

@WebService
@SOAPBinding(style=Style.RPC)
// Service Endpoint Interface (SEI)
public interface TimeServer{

	@WebMethod
	public String getTimeAsString();


}

---- Service Implementation Bean -------------

package alpha.omega;

import java.util.Date;
import javax.jws.WebService;


//Service Implementation Bean (SIB)
@WebService(endpointInterface="alpha.omega.TimeServer")
public class TimeServerImpl implements TimeServer{

	public String getTimeAsString(){
		return new Date().toString();
	}

}

------ Web service Publisher------------

package alpha.omega;


import javax.xml.ws.Endpoint;

public class TimeServerPublisher{

	public static void main(String[] args){
		Endpoint.publish("http://localhost:9876/ts", new TimeServerImpl());	
	}
}

Compile this src & run TimeServerPublisher

Open a browser & key in http://localhost:9876/ts?wsdl and there you go..

That's your first web service built and published.

You can build the client from this wsdl & invoke it like you do for any other web service.


P.S. I know i have skipped tons of details but i would suggest you to go thru Java Web Services: Up and Running book and read it thru.

This is what i am doing even tho i have some experience in building JAX-RPC based web services.

Cheers,
AA