Exposing business objects in an existing Servlet WebApp as Webservices

Question

Hi,
I am extending a legacy Servlet application (running under Tomcat 5.5).
I want to expose a class as a web service. What is the best way to do this ?
I have tried these so far without much success
1. Dropped Axis2.war in WebApp with my web service as a .aar file in services.
This introduces additional issues like intra-webapp communication.
The Webservice implementation uses objects in the legacy servlet.
I am yet to find a simple standard mechanism to achieve this.
2. Embed Axis2 inside the servlet.
I followed the following example to do this.
http://hacimbengali.blogspot.com/2007/05/adding-axis2-webservice.html
Basically, wrote another servlet, extended from AxisServlet and
added my POJO as a service. The code seems to execute without generating exceptions, but I am unable to invoke
my webservice or generate the WSDL from the browser by issuing http://localhost:8080/axis2/services/myservice?wsdl
The same class works if I make calls from a java console app and start SimpleHTTPServer.
So I am puzzled why this does not work in Tomcat
My code
//----------------------------------begin code--------------------------------------------------------
public class AxisXServlet extends org.apache.axis2.transport.http.AxisServlet {
static final long serialVersionUID = 1L;
/* (non-Java-doc)
     * @see javax.servlet.http.HttpServlet#HttpServlet()
     public AxisXServlet() {
          super();
     /* (non-Javadoc)
     * @see javax.servlet.GenericServlet#init()
     public void init(ServletConfig config) throws ServletException
     super.init(config);
     AxisService service;
     try {
     service = AxisService.createService(
               FPWSImpl.class.getName(),
               axisConfiguration);
     //RPCMessageReceiver.class);
     //service.setName();
     axisConfiguration.addService(service);
     axisConfiguration.startService(service.getName());
     } catch (AxisFault e) {
     e.printStackTrace();
//----------------------------------------end code-----------------------------------------------------------

Answer 1

Hi ialexei,
Have got the solution for your problem?. If yes, please post it here. I have same situation like this.
I have developed a java web application and the purpose of the application is to fetch the data which are updated or new from another site using their remote services. This operation is being performed in a fixed interval using a timer in my application. After getting the result from remote site, presently, I am keeping it in memory (Need at least 512 MB RAM). I have created a servlet and created some methods. These methods are accessible by passing the methodname as query parameter while calling the servlet. I have also created a web service for the methods which are available in servlet (in a separate class).
I have deployed the web service on Tomcat 5.0/Axis and web application on Tomcat ( same instance of Tomcat). Since one is web service and other is web application, I am duplicating the business logic/components and both are running separately also. I would like to use my business logic/components on either in web service or web application and divert the call from one to other.
I mean,
(1) if I use the business logic/components on web service, then from my servlet, I would like to call the web service and return the result
(2) if I use the business logic/components on web application, then from my web service, I would like to call the servlet and return the result
Pl. advice me which one from the above methods is good and how to implement that.
--Sabeer