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25 package org.slf4j.impl;
26
27 import java.io.FileNotFoundException;
28 import java.io.FileOutputStream;
29 import java.io.InputStream;
30 import java.io.PrintStream;
31 import java.security.AccessController;
32 import java.security.PrivilegedAction;
33 import java.text.DateFormat;
34 import java.text.SimpleDateFormat;
35 import java.util.Date;
36 import java.util.Properties;
37
38 import org.slf4j.Logger;
39 import org.slf4j.helpers.FormattingTuple;
40 import org.slf4j.helpers.MarkerIgnoringBase;
41 import org.slf4j.helpers.MessageFormatter;
42 import org.slf4j.helpers.Util;
43 import org.slf4j.spi.LocationAwareLogger;
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118 public class SimpleLogger extends MarkerIgnoringBase {
119
120 private static final long serialVersionUID = -632788891211436180L;
121 private static final String CONFIGURATION_FILE = "simplelogger.properties";
122
123 private static long START_TIME = System.currentTimeMillis();
124 private static final Properties SIMPLE_LOGGER_PROPS = new Properties();
125
126 private static final int LOG_LEVEL_TRACE = LocationAwareLogger.TRACE_INT;
127 private static final int LOG_LEVEL_DEBUG = LocationAwareLogger.DEBUG_INT;
128 private static final int LOG_LEVEL_INFO = LocationAwareLogger.INFO_INT;
129 private static final int LOG_LEVEL_WARN = LocationAwareLogger.WARN_INT;
130 private static final int LOG_LEVEL_ERROR = LocationAwareLogger.ERROR_INT;
131
132 private static boolean INITIALIZED = false;
133
134 private static int DEFAULT_LOG_LEVEL = LOG_LEVEL_INFO;
135 private static boolean SHOW_DATE_TIME = false;
136 private static String DATE_TIME_FORMAT_STR = null;
137 private static DateFormat DATE_FORMATTER = null;
138 private static boolean SHOW_THREAD_NAME = true;
139 private static boolean SHOW_LOG_NAME = true;
140 private static boolean SHOW_SHORT_LOG_NAME = false;
141 private static String LOG_FILE = "System.err";
142 private static PrintStream TARGET_STREAM = null;
143 private static boolean LEVEL_IN_BRACKETS = false;
144 private static String WARN_LEVEL_STRING = "WARN";
145
146
147 public static final String SYSTEM_PREFIX = "org.slf4j.simpleLogger.";
148
149 public static final String DEFAULT_LOG_LEVEL_KEY = SYSTEM_PREFIX + "defaultLogLevel";
150 public static final String SHOW_DATE_TIME_KEY = SYSTEM_PREFIX + "showDateTime";
151 public static final String DATE_TIME_FORMAT_KEY = SYSTEM_PREFIX + "dateTimeFormat";
152 public static final String SHOW_THREAD_NAME_KEY = SYSTEM_PREFIX + "showThreadName";
153 public static final String SHOW_LOG_NAME_KEY = SYSTEM_PREFIX + "showLogName";
154 public static final String SHOW_SHORT_LOG_NAME_KEY = SYSTEM_PREFIX + "showShortLogName";
155 public static final String LOG_FILE_KEY = SYSTEM_PREFIX + "logFile";
156 public static final String LEVEL_IN_BRACKETS_KEY = SYSTEM_PREFIX + "levelInBrackets";
157 public static final String WARN_LEVEL_STRING_KEY = SYSTEM_PREFIX + "warnLevelString";
158
159 public static final String LOG_KEY_PREFIX = SYSTEM_PREFIX + "log.";
160
161 private static String getStringProperty(String name) {
162 String prop = null;
163 try {
164 prop = System.getProperty(name);
165 } catch (SecurityException e) {
166 ;
167 }
168 return (prop == null) ? SIMPLE_LOGGER_PROPS.getProperty(name) : prop;
169 }
170
171 private static String getStringProperty(String name, String defaultValue) {
172 String prop = getStringProperty(name);
173 return (prop == null) ? defaultValue : prop;
174 }
175
176 private static boolean getBooleanProperty(String name, boolean defaultValue) {
177 String prop = getStringProperty(name);
178 return (prop == null) ? defaultValue : "true".equalsIgnoreCase(prop);
179 }
180
181
182
183
184 static void init() {
185 INITIALIZED = true;
186 loadProperties();
187
188 String defaultLogLevelString = getStringProperty(DEFAULT_LOG_LEVEL_KEY, null);
189 if (defaultLogLevelString != null)
190 DEFAULT_LOG_LEVEL = stringToLevel(defaultLogLevelString);
191
192 SHOW_LOG_NAME = getBooleanProperty(SHOW_LOG_NAME_KEY, SHOW_LOG_NAME);
193 SHOW_SHORT_LOG_NAME = getBooleanProperty(SHOW_SHORT_LOG_NAME_KEY, SHOW_SHORT_LOG_NAME);
194 SHOW_DATE_TIME = getBooleanProperty(SHOW_DATE_TIME_KEY, SHOW_DATE_TIME);
195 SHOW_THREAD_NAME = getBooleanProperty(SHOW_THREAD_NAME_KEY, SHOW_THREAD_NAME);
196 DATE_TIME_FORMAT_STR = getStringProperty(DATE_TIME_FORMAT_KEY, DATE_TIME_FORMAT_STR);
197 LEVEL_IN_BRACKETS = getBooleanProperty(LEVEL_IN_BRACKETS_KEY, LEVEL_IN_BRACKETS);
198 WARN_LEVEL_STRING = getStringProperty(WARN_LEVEL_STRING_KEY, WARN_LEVEL_STRING);
199
200 LOG_FILE = getStringProperty(LOG_FILE_KEY, LOG_FILE);
201 TARGET_STREAM = computeTargetStream(LOG_FILE);
202
203 if (DATE_TIME_FORMAT_STR != null) {
204 try {
205 DATE_FORMATTER = new SimpleDateFormat(DATE_TIME_FORMAT_STR);
206 } catch (IllegalArgumentException e) {
207 Util.report("Bad date format in " + CONFIGURATION_FILE + "; will output relative time", e);
208 }
209 }
210 }
211
212 private static PrintStream computeTargetStream(String logFile) {
213 if ("System.err".equalsIgnoreCase(logFile))
214 return System.err;
215 else if ("System.out".equalsIgnoreCase(logFile)) {
216 return System.out;
217 } else {
218 try {
219 FileOutputStream fos = new FileOutputStream(logFile);
220 PrintStream printStream = new PrintStream(fos);
221 return printStream;
222 } catch (FileNotFoundException e) {
223 Util.report("Could not open [" + logFile + "]. Defaulting to System.err", e);
224 return System.err;
225 }
226 }
227 }
228
229 private static void loadProperties() {
230
231 InputStream in = AccessController.doPrivileged(new PrivilegedAction<InputStream>() {
232 public InputStream run() {
233 ClassLoader threadCL = Thread.currentThread().getContextClassLoader();
234 if (threadCL != null) {
235 return threadCL.getResourceAsStream(CONFIGURATION_FILE);
236 } else {
237 return ClassLoader.getSystemResourceAsStream(CONFIGURATION_FILE);
238 }
239 }
240 });
241 if (null != in) {
242 try {
243 SIMPLE_LOGGER_PROPS.load(in);
244 in.close();
245 } catch (java.io.IOException e) {
246
247 }
248 }
249 }
250
251
252 protected int currentLogLevel = LOG_LEVEL_INFO;
253
254 private transient String shortLogName = null;
255
256
257
258
259
260 SimpleLogger(String name) {
261 if (!INITIALIZED) {
262 init();
263 }
264 this.name = name;
265
266 String levelString = recursivelyComputeLevelString();
267 if (levelString != null) {
268 this.currentLogLevel = stringToLevel(levelString);
269 } else {
270 this.currentLogLevel = DEFAULT_LOG_LEVEL;
271 }
272 }
273
274 String recursivelyComputeLevelString() {
275 String tempName = name;
276 String levelString = null;
277 int indexOfLastDot = tempName.length();
278 while ((levelString == null) && (indexOfLastDot > -1)) {
279 tempName = tempName.substring(0, indexOfLastDot);
280 levelString = getStringProperty(LOG_KEY_PREFIX + tempName, null);
281 indexOfLastDot = String.valueOf(tempName).lastIndexOf(".");
282 }
283 return levelString;
284 }
285
286 private static int stringToLevel(String levelStr) {
287 if ("trace".equalsIgnoreCase(levelStr)) {
288 return LOG_LEVEL_TRACE;
289 } else if ("debug".equalsIgnoreCase(levelStr)) {
290 return LOG_LEVEL_DEBUG;
291 } else if ("info".equalsIgnoreCase(levelStr)) {
292 return LOG_LEVEL_INFO;
293 } else if ("warn".equalsIgnoreCase(levelStr)) {
294 return LOG_LEVEL_WARN;
295 } else if ("error".equalsIgnoreCase(levelStr)) {
296 return LOG_LEVEL_ERROR;
297 }
298
299 return LOG_LEVEL_INFO;
300 }
301
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309
310 private void log(int level, String message, Throwable t) {
311 if (!isLevelEnabled(level)) {
312 return;
313 }
314
315 StringBuilder buf = new StringBuilder(32);
316
317
318 if (SHOW_DATE_TIME) {
319 if (DATE_FORMATTER != null) {
320 buf.append(getFormattedDate());
321 buf.append(' ');
322 } else {
323 buf.append(System.currentTimeMillis() - START_TIME);
324 buf.append(' ');
325 }
326 }
327
328
329 if (SHOW_THREAD_NAME) {
330 buf.append('[');
331 buf.append(Thread.currentThread().getName());
332 buf.append("] ");
333 }
334
335 if (LEVEL_IN_BRACKETS)
336 buf.append('[');
337
338
339 switch (level) {
340 case LOG_LEVEL_TRACE:
341 buf.append("TRACE");
342 break;
343 case LOG_LEVEL_DEBUG:
344 buf.append("DEBUG");
345 break;
346 case LOG_LEVEL_INFO:
347 buf.append("INFO");
348 break;
349 case LOG_LEVEL_WARN:
350 buf.append(WARN_LEVEL_STRING);
351 break;
352 case LOG_LEVEL_ERROR:
353 buf.append("ERROR");
354 break;
355 }
356 if (LEVEL_IN_BRACKETS)
357 buf.append(']');
358 buf.append(' ');
359
360
361 if (SHOW_SHORT_LOG_NAME) {
362 if (shortLogName == null)
363 shortLogName = computeShortName();
364 buf.append(String.valueOf(shortLogName)).append(" - ");
365 } else if (SHOW_LOG_NAME) {
366 buf.append(String.valueOf(name)).append(" - ");
367 }
368
369
370 buf.append(message);
371
372 write(buf, t);
373
374 }
375
376 void write(StringBuilder buf, Throwable t) {
377 TARGET_STREAM.println(buf.toString());
378 if (t != null) {
379 t.printStackTrace(TARGET_STREAM);
380 }
381 TARGET_STREAM.flush();
382 }
383
384 private String getFormattedDate() {
385 Date now = new Date();
386 String dateText;
387 synchronized (DATE_FORMATTER) {
388 dateText = DATE_FORMATTER.format(now);
389 }
390 return dateText;
391 }
392
393 private String computeShortName() {
394 return name.substring(name.lastIndexOf(".") + 1);
395 }
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404
405 private void formatAndLog(int level, String format, Object arg1, Object arg2) {
406 if (!isLevelEnabled(level)) {
407 return;
408 }
409 FormattingTuple tp = MessageFormatter.format(format, arg1, arg2);
410 log(level, tp.getMessage(), tp.getThrowable());
411 }
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420 private void formatAndLog(int level, String format, Object... arguments) {
421 if (!isLevelEnabled(level)) {
422 return;
423 }
424 FormattingTuple tp = MessageFormatter.arrayFormat(format, arguments);
425 log(level, tp.getMessage(), tp.getThrowable());
426 }
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432
433 protected boolean isLevelEnabled(int logLevel) {
434
435
436 return (logLevel >= currentLogLevel);
437 }
438
439
440 public boolean isTraceEnabled() {
441 return isLevelEnabled(LOG_LEVEL_TRACE);
442 }
443
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447
448 public void trace(String msg) {
449 log(LOG_LEVEL_TRACE, msg, null);
450 }
451
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455
456 public void trace(String format, Object param1) {
457 formatAndLog(LOG_LEVEL_TRACE, format, param1, null);
458 }
459
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463
464 public void trace(String format, Object param1, Object param2) {
465 formatAndLog(LOG_LEVEL_TRACE, format, param1, param2);
466 }
467
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471
472 public void trace(String format, Object... argArray) {
473 formatAndLog(LOG_LEVEL_TRACE, format, argArray);
474 }
475
476
477 public void trace(String msg, Throwable t) {
478 log(LOG_LEVEL_TRACE, msg, t);
479 }
480
481
482 public boolean isDebugEnabled() {
483 return isLevelEnabled(LOG_LEVEL_DEBUG);
484 }
485
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489
490 public void debug(String msg) {
491 log(LOG_LEVEL_DEBUG, msg, null);
492 }
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498 public void debug(String format, Object param1) {
499 formatAndLog(LOG_LEVEL_DEBUG, format, param1, null);
500 }
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506 public void debug(String format, Object param1, Object param2) {
507 formatAndLog(LOG_LEVEL_DEBUG, format, param1, param2);
508 }
509
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513
514 public void debug(String format, Object... argArray) {
515 formatAndLog(LOG_LEVEL_DEBUG, format, argArray);
516 }
517
518
519 public void debug(String msg, Throwable t) {
520 log(LOG_LEVEL_DEBUG, msg, t);
521 }
522
523
524 public boolean isInfoEnabled() {
525 return isLevelEnabled(LOG_LEVEL_INFO);
526 }
527
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531
532 public void info(String msg) {
533 log(LOG_LEVEL_INFO, msg, null);
534 }
535
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540 public void info(String format, Object arg) {
541 formatAndLog(LOG_LEVEL_INFO, format, arg, null);
542 }
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547
548 public void info(String format, Object arg1, Object arg2) {
549 formatAndLog(LOG_LEVEL_INFO, format, arg1, arg2);
550 }
551
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555
556 public void info(String format, Object... argArray) {
557 formatAndLog(LOG_LEVEL_INFO, format, argArray);
558 }
559
560
561 public void info(String msg, Throwable t) {
562 log(LOG_LEVEL_INFO, msg, t);
563 }
564
565
566 public boolean isWarnEnabled() {
567 return isLevelEnabled(LOG_LEVEL_WARN);
568 }
569
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573
574 public void warn(String msg) {
575 log(LOG_LEVEL_WARN, msg, null);
576 }
577
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581
582 public void warn(String format, Object arg) {
583 formatAndLog(LOG_LEVEL_WARN, format, arg, null);
584 }
585
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590 public void warn(String format, Object arg1, Object arg2) {
591 formatAndLog(LOG_LEVEL_WARN, format, arg1, arg2);
592 }
593
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597
598 public void warn(String format, Object... argArray) {
599 formatAndLog(LOG_LEVEL_WARN, format, argArray);
600 }
601
602
603 public void warn(String msg, Throwable t) {
604 log(LOG_LEVEL_WARN, msg, t);
605 }
606
607
608 public boolean isErrorEnabled() {
609 return isLevelEnabled(LOG_LEVEL_ERROR);
610 }
611
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615
616 public void error(String msg) {
617 log(LOG_LEVEL_ERROR, msg, null);
618 }
619
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622
623
624 public void error(String format, Object arg) {
625 formatAndLog(LOG_LEVEL_ERROR, format, arg, null);
626 }
627
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631
632 public void error(String format, Object arg1, Object arg2) {
633 formatAndLog(LOG_LEVEL_ERROR, format, arg1, arg2);
634 }
635
636
637
638
639
640 public void error(String format, Object... argArray) {
641 formatAndLog(LOG_LEVEL_ERROR, format, argArray);
642 }
643
644
645 public void error(String msg, Throwable t) {
646 log(LOG_LEVEL_ERROR, msg, t);
647 }
648 }