GreetingClientServlet


1   package example;
2   
3   import java.io.PrintWriter  ;
4   import java.io.IOException  ;
5   
6   import javax.servlet.ServletRequest  ;
7   import javax.servlet.ServletResponse  ;
8   import javax.servlet.GenericServlet  ;
9   import javax.servlet.ServletException  ;
10  
11  /**
12   * The injection filter adds configuration objects to the request
13   * attributes.
14   */
15  public class GreetingClientServlet extends GenericServlet   {
16    private String   _name = "generic";
17    private GreetingAPI _greeting;
18  
19    /**
20     * Sets the client servlet name.
21     */
22    public void setName(String   name)
23    {
24      _name = name;
25    }
26  
27    /**
28     * Sets the client greeting.
29     */
30    public void setGreeting(GreetingAPI greeting)
31    {
32      _greeting = greeting;
33    }
34  
35    /**
36     * Servlet init
37     */
38    public void init()
39      throws ServletException  
40    {
41      if (_greeting == null)
42        throw new ServletException  ("GreetingClientServlet needs a configured greeting");
43    }
44  
45    /**
46     * Runs the servlet
47     */
48    public void service(ServletRequest   req, ServletResponse   res)
49      throws IOException  , ServletException  
50    {
51      PrintWriter   out = res.getWriter();
52  
53      out.println(_name + ": " + _greeting.greeting());
54    }
55  }
56

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