Object[] params = new Object[2]; 
params[0] = new RPCParam( "parms ", myhash); 
params[1] = new RPCParam( "parms2 ", "myparam1"); 
// more params

Service service = new Service(); 
Call call = (Call) service.createCall(); 
call.setTargetEndpointAddress(new java.net.URL( "my_url")); 
HashMap h = (HashMap) call.invoke("myservice", params); 
return new Hashtable(h); 

class MyServiceProvider{ 
public static Hashtable myservice(Hashtable h, String param){ 

// receive hashtable here after the call 
// process the request and return hashtable 

MessageContext mc = MessageContext.getCurrentContext(); 
ServletContext sc ((HttpServlet) mc.getProperty(HTTPConstants.MC_HTTP_SERVLET)) 
.getServletContext(); 

//get the attributes of the request object
HttpServletRequest request (HttpServletRequest) mc.getProperty(HTTPConstants.MC_HTTP_SERVLETREQUEST); 
return hashtable; 
} 
}