1   /**
2    * Copyright (c) 2000-2008 Liferay, Inc. All rights reserved.
3    *
4    * Permission is hereby granted, free of charge, to any person obtaining a copy
5    * of this software and associated documentation files (the "Software"), to deal
6    * in the Software without restriction, including without limitation the rights
7    * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8    * copies of the Software, and to permit persons to whom the Software is
9    * furnished to do so, subject to the following conditions:
10   *
11   * The above copyright notice and this permission notice shall be included in
12   * all copies or substantial portions of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portal.theme;
24  
25  import com.liferay.portal.kernel.util.GetterUtil;
26  import com.liferay.portal.kernel.util.Validator;
27  import com.liferay.portal.service.impl.ThemeLocalUtil;
28  import com.liferay.portal.util.DocumentUtil;
29  import com.liferay.portal.util.PropsValues;
30  import com.liferay.util.FileUtil;
31  
32  import java.io.File;
33  
34  import java.util.HashMap;
35  import java.util.Map;
36  
37  import javax.servlet.ServletContext;
38  
39  import org.apache.commons.logging.Log;
40  import org.apache.commons.logging.LogFactory;
41  
42  import org.dom4j.Document;
43  import org.dom4j.Element;
44  
45  /**
46   * <a href="ThemeLoader.java.html"><b><i>View Source</i></b></a>
47   *
48   * @author Brian Wing Shun Chan
49   *
50   */
51  public class ThemeLoader {
52  
53      public String getServletContextName() {
54          return _servletContextName;
55      }
56  
57      public String getThemesPath() {
58          return _themesPath;
59      }
60  
61      public File getFileStorage() {
62          return _fileStorage;
63      }
64  
65      public synchronized void loadThemes() {
66          if (_log.isInfoEnabled()) {
67              _log.info("Loading themes in " + _fileStorage);
68          }
69  
70          File[] files = _fileStorage.listFiles();
71  
72          if (files == null) {
73              if (_log.isWarnEnabled()) {
74                  _log.warn(
75                      "There are no directories to process for  " + _fileStorage);
76              }
77  
78              return;
79          }
80  
81          for (int i = 0; i < files.length; i++) {
82              if (_log.isDebugEnabled()) {
83                  _log.debug("Process directory " + files[i]);
84              }
85  
86              File liferayLookAndFeelXML = new File(
87                  files[i] + "/liferay-look-and-feel.xml");
88  
89              if (liferayLookAndFeelXML.exists()) {
90                  String lastModifiedKey = liferayLookAndFeelXML.toString();
91  
92                  Long prevLastModified = _lastModifiedMap.get(lastModifiedKey);
93  
94                  long lastModified = liferayLookAndFeelXML.lastModified();
95  
96                  if ((prevLastModified == null) ||
97                      (prevLastModified.longValue() < lastModified)) {
98  
99                      registerTheme(liferayLookAndFeelXML);
100 
101                     _lastModifiedMap.put(lastModifiedKey, lastModified);
102                 }
103                 else {
104                     if (_log.isDebugEnabled()) {
105                         _log.debug(
106                             "Do not refresh " + liferayLookAndFeelXML +
107                                 " because it is has not been modified");
108                     }
109                 }
110             }
111             else {
112                 if (_log.isWarnEnabled()) {
113                     _log.warn(liferayLookAndFeelXML + " does not exist");
114                 }
115             }
116         }
117     }
118 
119     protected ThemeLoader(
120         String servletContextName, ServletContext ctx, String[] xmls) {
121 
122         _servletContextName = servletContextName;
123         _ctx = ctx;
124 
125         try {
126             Document doc = DocumentUtil.readDocumentFromXML(xmls[0], true);
127 
128             Element root = doc.getRootElement();
129 
130             _themesPath = GetterUtil.getString(
131                 root.elementText("themes-path"), "/themes");
132 
133             String fileStorageValue = PropsValues.THEME_LOADER_STORAGE_PATH;
134 
135             fileStorageValue = GetterUtil.getString(
136                 root.elementText("file-storage"), fileStorageValue);
137 
138             if (Validator.isNotNull(fileStorageValue)) {
139                 _fileStorage = new File(fileStorageValue);
140                 _loadFromServletContext = false;
141             }
142             else {
143                 _fileStorage = new File(ctx.getRealPath(_themesPath));
144                 _loadFromServletContext = true;
145             }
146 
147             if (!_fileStorage.exists()) {
148                 if (_log.isWarnEnabled()) {
149                     _log.warn(
150                         "File storage " + _fileStorage + " does not exist");
151                 }
152 
153                 if (!_fileStorage.mkdirs()) {
154                     _log.error(
155                         "Unable to create theme loader file storage at " +
156                             _fileStorage);
157                 }
158             }
159         }
160         catch (Exception e) {
161             _log.error(e, e);
162         }
163 
164         loadThemes();
165     }
166 
167     protected void destroy() {
168     }
169 
170     protected void registerTheme(File liferayLookAndFeelXML) {
171         if (_log.isDebugEnabled()) {
172             _log.debug("Registering " + liferayLookAndFeelXML);
173         }
174 
175         try {
176             String content = FileUtil.read(liferayLookAndFeelXML);
177 
178             ThemeLocalUtil.init(
179                 _servletContextName, _ctx, _themesPath, _loadFromServletContext,
180                 new String[] {content}, null);
181         }
182         catch (Exception e) {
183             _log.error(
184                 "Error registering theme " + liferayLookAndFeelXML.toString(),
185                 e);
186         }
187     }
188 
189     private static Log _log = LogFactory.getLog(ThemeLoader.class);
190 
191     private String _servletContextName;
192     private ServletContext _ctx;
193     private String _themesPath;
194     private File _fileStorage;
195     private boolean _loadFromServletContext = true;
196     private Map<String, Long> _lastModifiedMap = new HashMap<String, Long>();
197 
198 }