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1
16 package info.magnolia.logging;
17
18 import java.io.IOException  ;
19 import java.io.PrintWriter ;
20 import java.util.ArrayList ;
21 import java.util.Collections ;
22 import java.util.Comparator ;
23 import java.util.Enumeration ;
24 import java.util.Iterator ;
25 import java.util.List ;
26
27 import javax.servlet.ServletConfig ;
28 import javax.servlet.ServletException ;
29 import javax.servlet.http.HttpServlet ;
30 import javax.servlet.http.HttpServletRequest ;
31 import javax.servlet.http.HttpServletResponse ;
32
33 import org.apache.commons.lang.StringUtils;
34 import org.apache.log4j.Level;
35 import org.apache.log4j.LogManager;
36 import org.apache.log4j.Logger;
37
38
39
78 public class Log4jConfigurationServlet extends HttpServlet {
79
80
83 private static final long serialVersionUID = 64182;
84
85
88 private static final String CONTENT_TYPE = "text/html";
90
93 private static final String CONFIG_FRAGMENT = "fragment";
95
98 private static final String ROOT = "Root";
100
103 private static final String PARAM_CLASS = "class";
105
108 private static final String PARAM_LEVEL = "level";
110
113 private static final String PARAM_SORTBYLEVEL = "sortbylevel";
115
118 private static final String [] LEVELS = new String []{
119 Level.OFF.toString(),
120 Level.FATAL.toString(),
121 Level.ERROR.toString(),
122 Level.WARN.toString(),
123 Level.INFO.toString(),
124 Level.DEBUG.toString(),
125 Level.ALL.toString()};
126
127
130 private boolean isFragment;
131
132
139 public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException , IOException {
140
141 String sortByLevelParam = request.getParameter(PARAM_SORTBYLEVEL);
142 boolean sortByLevel = ("true".equalsIgnoreCase(sortByLevelParam) || "yes".equalsIgnoreCase(sortByLevelParam));
144 List loggers = getSortedLoggers(sortByLevel);
145 int loggerNum = 0;
146
147 PrintWriter out = response.getWriter();
148 if (!isFragment) {
149 response.setContentType(CONTENT_TYPE);
150
151 printHeader(out);
153 }
154
155 out.println("<a HREF=\"" + request.getRequestURI() + "\">Refresh</a>");
158 out.println("<table class=\"log4jtable\">"); out.println("<thead><tr>");
161 out.println("<th title=\"Logger name\">"); out.println("<a HREF=\"?" + PARAM_SORTBYLEVEL + "=false\">Class</a>"); out.println("</th>");
165 out.println("<th title=\"Is logging level inherited from parent?\" style=\"text-align:right\" >*</th>"); out.println("<th title=\"Logger level\">"); out.println("<a HREF=\"?" + PARAM_SORTBYLEVEL + "=true\">Level</a>"); out.println("</th>");
170 out.println("</tr></thead>"); out.println("<tbody>");
173 displayLogger(out, Logger.getRootLogger(), loggerNum++);
175
176 Iterator iterator = loggers.iterator();
178
179 while (iterator.hasNext()) {
180 displayLogger(out, (Logger) iterator.next(), loggerNum++);
181 }
182
183 out.println("</tbody>"); out.println("</table>"); out.println("<a HREF=\"\">Refresh</a>");
187 if (!isFragment) {
188 out.println("</body></html>"); out.flush();
190 out.close();
191 }
192 }
193
194
201 public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException , IOException {
202 String className = request.getParameter(PARAM_CLASS);
203 String level = request.getParameter(PARAM_LEVEL);
204
205 if (className != null) {
206 setClass(className, level);
207 }
208
209 doGet(request, response);
210 }
211
212
219 private void displayLogger(PrintWriter out, Logger logger, int row) {
220 String color = null;
221 String loggerName = (StringUtils.isEmpty(logger.getName()) ? ROOT : logger.getName());
222
223 color = ((row % 2) == 1) ? "even" : "odd";
225 out.println("<tr class=\"" + color + "\">");
227 out.println("<td>"); out.println(loggerName);
230 out.println("</td>");
232 out.println("<td style=\"text-align:right\">"); if ((logger.getLevel() == null)) {
235 out.println("*"); }
237 out.println("</td>");
239 out.println("<td>"); out.println("<form action=\"\" method=\"post\">"); printLevelSelector(out, logger.getEffectiveLevel().toString());
243 out.println("<input type=\"hidden\" name=\"" + PARAM_CLASS + "\" value=\"" + loggerName + "\">"); out.print("<input type=\"submit\" name=\"Set\" value=\"Set \">"); out.println("</form>"); out.println("</td>");
248 out.println("</tr>"); }
250
251
257 private synchronized String setClass(String className, String level) {
258 Logger logger = null;
259
260 try {
261 logger = (ROOT.equalsIgnoreCase(className) ? Logger.getRootLogger() : Logger.getLogger(className));
262 logger.setLevel(Level.toLevel(level));
263 }
264 catch (Throwable e) {
265 System .out.println("ERROR Setting LOG4J Logger:" + e); }
268
269 return "Message Set For " + (StringUtils.isEmpty(logger.getName()) ? ROOT : logger.getName()); }
271
272
277 private List getSortedLoggers(boolean sortByLevel) {
278 Enumeration enm = LogManager.getCurrentLoggers();
279 Comparator comp = new LoggerComparator(sortByLevel);
280 List list = new ArrayList ();
281
282 while (enm.hasMoreElements()) {
284 list.add(enm.nextElement());
285 }
286
287 Collections.sort(list, comp);
289
290 return list;
291 }
292
293
298 private void printHeader(PrintWriter out) {
299 out.println("<html><head><title>Log4J Control Console</title>");
301 out.println("<style type=\"text/css\">"); out.println("body{ background-color:#fff; }"); out.println("body, td, th, select, input{ font-family:Verdana, Geneva, Arial, sans-serif; font-size: 8pt;}"); out.println("select, input{ border: 1px solid #ccc;}"); out.println("table.log4jtable, table.log4jtable td { border-collapse:collapse; border: 1px solid #ccc; "); out.println("white-space: nowrap; text-align: left; }"); out.println("form { margin:0; padding:0; }"); out.println("table.log4jtable thead tr th{ background-color: #5991A6; padding: 2px; }"); out.println("table.log4jtable tr.even { background-color: #eee; }"); out.println("table.log4jtable tr.odd { background-color: #fff; }"); out.println("</style>");
313 out.println("</head>"); out.println("<body>"); out.println("<h3>Log4J Control Console</h3>"); }
317
318
323 private void printLevelSelector(PrintWriter out, String currentLevel) {
324 out.println("<select id=\"" + PARAM_LEVEL + "\" name=\"" + PARAM_LEVEL + "\">");
326 for (int j = 0; j < LEVELS.length; j++) {
327 out.print("<option"); if (LEVELS[j].equals(currentLevel)) {
329 out.print(" selected=\"selected\""); }
331 out.print(">"); out.print(LEVELS[j]);
333 out.println("</option>"); }
335 out.println("</select>"); }
337
338
341 private static class LoggerComparator implements Comparator {
342
343
346 private boolean sortByLevel;
347
348
352 public LoggerComparator(boolean sortByLevel) {
353 this.sortByLevel = sortByLevel;
354 }
355
356
362 public int compare(Object object1, Object object2) {
363 Logger logger1 = (Logger) object1;
364 Logger logger2 = (Logger) object2;
365
366 if (!sortByLevel) {
367 return logger1.getName().compareTo(logger2.getName());
368 }
369 return logger1.getEffectiveLevel().toInt() - logger2.getEffectiveLevel().toInt();
370 }
371
372
377 public boolean equals(Object object) {
378 if (!(object instanceof LoggerComparator)) {
379 return false;
380 }
381 return this.sortByLevel == ((LoggerComparator) object).sortByLevel;
382 }
383
384
387 public int hashCode() {
388 return super.hashCode();
389 }
390 }
391
392
395 public void init(ServletConfig config) throws ServletException {
396 String fragmentParam = config.getInitParameter(CONFIG_FRAGMENT);
397 isFragment = ("true".equalsIgnoreCase(fragmentParam) || "yes".equalsIgnoreCase(fragmentParam)); super.init(config);
399 }
400
401 } |
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