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Java > Open Source Codes > com > quadcap > app > dbimage > ActionLoad


1 package com.quadcap.app.dbimage;
2
3 /* Copyright 2000 - 2003 Quadcap Software. All rights reserved.
4  *
5  * This software is distributed under the Quadcap Free Software License.
6  * This software may be used or modified for any purpose, personal or
7  * commercial. Open Source redistributions are permitted. Commercial
8  * redistribution of larger works derived from, or works which bundle
9  * this software requires a "Commercial Redistribution License"; see
10  * http://www.quadcap.com/purchase.
11  *
12  * Redistributions qualify as "Open Source" under one of the following terms:
13  *
14  * Redistributions are made at no charge beyond the reasonable cost of
15  * materials and delivery.
16  *
17  * Redistributions are accompanied by a copy of the Source Code or by an
18  * irrevocable offer to provide a copy of the Source Code for up to three
19  * years at the cost of materials and delivery. Such redistributions
20  * must allow further use, modification, and redistribution of the Source
21  * Code under substantially the same terms as this license.
22  *
23  * Redistributions of source code must retain the copyright notices as they
24  * appear in each source code file, these license terms, and the
25  * disclaimer/limitation of liability set forth as paragraph 6 below.
26  *
27  * Redistributions in binary form must reproduce this Copyright Notice,
28  * these license terms, and the disclaimer/limitation of liability set
29  * forth as paragraph 6 below, in the documentation and/or other materials
30  * provided with the distribution.
31  *
32  * The Software is provided on an "AS IS" basis. No warranty is
33  * provided that the Software is free of defects, or fit for a
34  * particular purpose.
35  *
36  * Limitation of Liability. Quadcap Software shall not be liable
37  * for any damages suffered by the Licensee or any third party resulting
38  * from use of the Software.
39  */
40
41 import java.io.File JavaDoc;
42 import java.io.IOException JavaDoc;
43
44 import java.sql.Connection JavaDoc;
45 import java.sql.SQLException JavaDoc;
46
47 import javax.servlet.RequestDispatcher JavaDoc;
48 import javax.servlet.ServletConfig JavaDoc;
49 import javax.servlet.ServletContext JavaDoc;
50 import javax.servlet.ServletException JavaDoc;
51
52 import javax.servlet.http.HttpServletRequest JavaDoc;
53 import javax.servlet.http.HttpServletResponse JavaDoc;
54
55 /**
56  * Implementation of the 'load' action. We load files into the database
57  * from a directory specified in the request. When we're done, we forward
58  * to either the "error" or the "show" page.
59  *
60  * @author Stan Bailes
61  */
62 public class ActionLoad implements Action {
63     ServletConfig JavaDoc config;
64
65     /**
66      * We've hard-coded the names of the result JSP pages; if we wanted
67      * more flexibility, we could make these configuration parameters.
68      */
69     static final String JavaDoc errorPage = "/error.jsp";
70     static final String JavaDoc successPage = "/show.jsp";
71     
72     public ActionLoad() {}
73
74     public void init(ServletConfig JavaDoc config) {
75         this.config = config;
76     }
77
78     public void service(HttpServletRequest JavaDoc request,
79                         HttpServletResponse JavaDoc response)
80         throws Exception JavaDoc
81     {
82         String JavaDoc root = request.getParameter("root");
83         if (root == null || root.length() == 0) {
84             request.setAttribute("error-message",
85                                  "no 'root' parameter specified");
86             forward(request, response, errorPage);
87         } else {
88             File JavaDoc f = new File JavaDoc(root);
89
90             if (!f.exists()) {
91                 request.setAttribute("error-message",
92                                      "Can't read: " + root);
93                 forward(request, response, errorPage);
94                 return;
95             }
96                     
97             DbImageLoader loader = new DbImageLoader();
98             try {
99                 Connection JavaDoc conn = getConnection();
100                 try {
101                     loader.loadImages(conn, root);
102                 } finally {
103                     conn.close();
104                 }
105                 forward(request, response, successPage);
106             } catch (Throwable JavaDoc th) {
107                 request.setAttribute("exception", th);
108                 forward(request, response, errorPage);
109             }
110         }
111     }
112
113     public Connection JavaDoc getConnection() throws SQLException JavaDoc {
114         ServletContext JavaDoc application = config.getServletContext();
115         DbImageServlet s = (DbImageServlet)application.getAttribute("servlet");
116         return s.getConnection();
117     }
118
119     public void forward(HttpServletRequest JavaDoc request,
120                         HttpServletResponse JavaDoc response,
121                         String JavaDoc page)
122         throws ServletException JavaDoc, IOException JavaDoc
123     {
124         ServletContext JavaDoc context = config.getServletContext();
125         RequestDispatcher JavaDoc rd = context.getRequestDispatcher(page);
126         rd.forward(request, response);
127     }
128 }
129
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