1 /*
2 * $Id$
3 *
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21 package org.apache.struts.apps.mailreader.actions;
22
23 import java.util.ArrayList;
24
25 import jakarta.servlet.http.HttpServletRequest;
26 import jakarta.servlet.http.HttpServletResponse;
27
28 import org.apache.struts.action.ActionForm;
29 import org.apache.struts.action.ActionForward;
30 import org.apache.struts.action.ActionMapping;
31 import org.apache.struts.apps.mailreader.Constants;
32 import org.apache.struts.apps.mailreader.dao.UserDatabase;
33 import org.apache.struts.util.MessageResources;
34
35
36 /**
37 * <p>
38 * Confirm required resources are available before displaying initial page.
39 * </p><p>
40 * If a resource is missing,
41 * forward to "failure". Otherwise, forward to "success", where
42 * success is usually the "welcome" page.
43 * </p><p>
44 * Since "required resources" includes the application MessageResources
45 * the failure page must not use the standard error or message tags.
46 * Instead, it display the Strings stored in an ArrayList stored under
47 * the request attribute "ERROR".
48 * </p>
49 *
50 * @version $Rev$ $Date$
51 */
52 public final class WelcomeAction extends BaseAction {
53 private static final long serialVersionUID = -472331143659176877L;
54
55 // See superclass for Javadoc
56 public ActionForward execute(
57 ActionMapping mapping,
58 ActionForm form,
59 HttpServletRequest request,
60 HttpServletResponse response)
61 throws Exception {
62
63 // Setup message array in case there are errors
64 ArrayList<String> messages = new ArrayList<>();
65
66 // Confirm message resources loaded
67 MessageResources resources = getResources(request);
68 if (resources == null) {
69 messages.add(Constants.ERROR_MESSAGES_NOT_LOADED);
70 }
71
72 // Confirm database loaded
73 UserDatabase userDatabase = doGetUserDatabase();
74 if (userDatabase == null) {
75 messages.add(Constants.ERROR_DATABASE_NOT_LOADED);
76 }
77
78 // If there were errors, forward to our failure page
79 if (messages.size() > 0) {
80 request.setAttribute(Constants.ERROR_KEY, messages);
81 return doFindFailure(mapping);
82 }
83
84 // Forward to our success page
85 return doFindSuccess(mapping);
86 }
87 }