All methods declared in our web service implementation class, CourseManagementService, are exposed as web service operations. However, if you want to expose only a limited set of methods from the web service implementation class, then you can use the Java interface. For example, if we want to expose only the getCourses method as a web service operation, then we can create an interface, let's say ICourseManagementService:

package packt.jee.eclipse.ws.soap; 
 
import java.util.List; 
 
import javax.jws.WebService; 
 
@WebService 
public interface ICourseManagementService { 
  public List<Course> getCourses(); 
} 

The implementation class also needs to be annotated with @WebService, with the endpointInterface attribute set to the interface name:

package packt.jee.eclipse.ws.soap; 
 
import java.util.ArrayList; 
import java.util.List; 
 
import javax.jws.WebService; 
 
@WebService 
 (endpointInterface="packt.jee.eclipse.ws.soap.ICourseManagementService") 
public class CourseManagementService implements ICourseManagementService { 
 
  //getCourses and getCourse methods follow here 
} 

Now, restart Tomcat and inspect the WSDL. You will notice that only the getCourses operation is defined in the WSDL.