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1 package com.mockobjects.examples.calcserver;
2
3 import java.io.IOException  ;
4 import java.io.PrintWriter ;
5 import java.sql.Connection ;
6 import java.sql.SQLException ;
7 import javax.servlet.ServletException ;
8 import javax.servlet.http.HttpServlet ;
9 import javax.servlet.http.HttpServletRequest ;
10 import javax.servlet.http.HttpServletResponse ;
11
12 public class CalculatorServlet extends HttpServlet {
13 IntCalculator myCalculator;
14
15
16 public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException , IOException {
17 performTask(request, response);
18 }
19
20 public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException , IOException {
21 performTask(request, response);
22 }
23
24 public String getServletInfo() {
25 return super.getServletInfo();
26 }
27
28 public void init() throws ServletException {
29 try {
30 Connection connection = Database.createConnection();
31 myCalculator =
32 new SqlSavingCalculator(
33 new Calculator(),
34 connection.prepareStatement("INSERT INTO LOG VALUES (?)"));
35 } catch (SQLException ex) {
36 throw new ServletException (ex);
37 }
38 }
39
40
41 public void init(IntCalculator calculator) {
42 myCalculator = calculator;
43 }
44
45
46 public void performTask(HttpServletRequest request, HttpServletResponse response) throws ServletException , IOException {
47 response.setContentType("text/plain");
48
49 PrintWriter wr = response.getWriter();
50 try {
51 int value1 = Integer.parseInt(request.getParameter("value1"));
52 int value2 = Integer.parseInt(request.getParameter("value2"));
53
54 String operation = request.getPathInfo();
55 wr.println(myCalculator.calculate(value1, value2, operation));
56 } catch (NumberFormatException ex) {
57 wr.println("Calculation failed " + ex);
58 } catch (CalculatorException ex) {
59 wr.println("Calculation failed " + ex);
60 }
61 }
62 } |
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