Getting Started with WebSphere Application Server

Chapter 7 – Web services 139
e.printStackTrace();
}
}
Listing 7.9 – Get Web service from Web application context
To resolve the type errors add this line:
import javax.naming.*;
You can also use annotation to get the Web service resource into the servlet. Add the lines
below in the Servlet class definition:
@Resource(name="services/Hello")
Service service;
Then change the doPost method as shown in Listing 7.10:
protected void doPost(HttpServletRequest request, HttpServletResponse
response) throws ServletException, IOException {
PrintWriter out = response.getWriter();
String target = request.getParameter("target");
HelloBillService billService = (HelloBillService)service;
HelloPeople bill = billService.getHelloBillPort();
out.println(bill.sayHello(target));
}
Listing 7.10 – Changes in Servlet after using @Resource annotation
To resolve the type errors add these lines:
import javax.annotation.Resource;
import javax.xml.ws.Service;
7.4 Creating Data Web services with IBM Data Studio
Data Web Services refer to the ability to wrap Web services around the logic provided by
the database. For example, you might already have a SQL script or stored procedure that
provides business logic for returning the current price of a particular item in inventory from
the database. Using Data Web Services, you are simply making it much easier for a Web
application (or other client) to invoke that capability, perhaps even as simple as putting the
HTTP request in a Web browser.
This approach to creating a Web service based on existing database operations/business
logic is called “bottoms up” as opposed to a to ”top down” approach in which the Web
services description is defined first and then logic is provided to map to that particular
description.