J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2000-2006 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package java.util.logging; |
| 27 | |
| 28 | import java.io.*; |
| 29 | import java.nio.channels.FileChannel; |
| 30 | import java.nio.channels.FileLock; |
| 31 | import java.security.*; |
| 32 | |
| 33 | /** |
| 34 | * Simple file logging <tt>Handler</tt>. |
| 35 | * <p> |
| 36 | * The <tt>FileHandler</tt> can either write to a specified file, |
| 37 | * or it can write to a rotating set of files. |
| 38 | * <p> |
| 39 | * For a rotating set of files, as each file reaches a given size |
| 40 | * limit, it is closed, rotated out, and a new file opened. |
| 41 | * Successively older files are named by adding "0", "1", "2", |
| 42 | * etc into the base filename. |
| 43 | * <p> |
| 44 | * By default buffering is enabled in the IO libraries but each log |
| 45 | * record is flushed out when it is complete. |
| 46 | * <p> |
| 47 | * By default the <tt>XMLFormatter</tt> class is used for formatting. |
| 48 | * <p> |
| 49 | * <b>Configuration:</b> |
| 50 | * By default each <tt>FileHandler</tt> is initialized using the following |
| 51 | * <tt>LogManager</tt> configuration properties. If properties are not defined |
| 52 | * (or have invalid values) then the specified default values are used. |
| 53 | * <ul> |
| 54 | * <li> java.util.logging.FileHandler.level |
| 55 | * specifies the default level for the <tt>Handler</tt> |
| 56 | * (defaults to <tt>Level.ALL</tt>). |
| 57 | * <li> java.util.logging.FileHandler.filter |
| 58 | * specifies the name of a <tt>Filter</tt> class to use |
| 59 | * (defaults to no <tt>Filter</tt>). |
| 60 | * <li> java.util.logging.FileHandler.formatter |
| 61 | * specifies the name of a <tt>Formatter</tt> class to use |
| 62 | * (defaults to <tt>java.util.logging.XMLFormatter</tt>) |
| 63 | * <li> java.util.logging.FileHandler.encoding |
| 64 | * the name of the character set encoding to use (defaults to |
| 65 | * the default platform encoding). |
| 66 | * <li> java.util.logging.FileHandler.limit |
| 67 | * specifies an approximate maximum amount to write (in bytes) |
| 68 | * to any one file. If this is zero, then there is no limit. |
| 69 | * (Defaults to no limit). |
| 70 | * <li> java.util.logging.FileHandler.count |
| 71 | * specifies how many output files to cycle through (defaults to 1). |
| 72 | * <li> java.util.logging.FileHandler.pattern |
| 73 | * specifies a pattern for generating the output file name. See |
| 74 | * below for details. (Defaults to "%h/java%u.log"). |
| 75 | * <li> java.util.logging.FileHandler.append |
| 76 | * specifies whether the FileHandler should append onto |
| 77 | * any existing files (defaults to false). |
| 78 | * </ul> |
| 79 | * <p> |
| 80 | * <p> |
| 81 | * A pattern consists of a string that includes the following special |
| 82 | * components that will be replaced at runtime: |
| 83 | * <ul> |
| 84 | * <li> "/" the local pathname separator |
| 85 | * <li> "%t" the system temporary directory |
| 86 | * <li> "%h" the value of the "user.home" system property |
| 87 | * <li> "%g" the generation number to distinguish rotated logs |
| 88 | * <li> "%u" a unique number to resolve conflicts |
| 89 | * <li> "%%" translates to a single percent sign "%" |
| 90 | * </ul> |
| 91 | * If no "%g" field has been specified and the file count is greater |
| 92 | * than one, then the generation number will be added to the end of |
| 93 | * the generated filename, after a dot. |
| 94 | * <p> |
| 95 | * Thus for example a pattern of "%t/java%g.log" with a count of 2 |
| 96 | * would typically cause log files to be written on Solaris to |
| 97 | * /var/tmp/java0.log and /var/tmp/java1.log whereas on Windows 95 they |
| 98 | * would be typically written to C:\TEMP\java0.log and C:\TEMP\java1.log |
| 99 | * <p> |
| 100 | * Generation numbers follow the sequence 0, 1, 2, etc. |
| 101 | * <p> |
| 102 | * Normally the "%u" unique field is set to 0. However, if the <tt>FileHandler</tt> |
| 103 | * tries to open the filename and finds the file is currently in use by |
| 104 | * another process it will increment the unique number field and try |
| 105 | * again. This will be repeated until <tt>FileHandler</tt> finds a file name that |
| 106 | * is not currently in use. If there is a conflict and no "%u" field has |
| 107 | * been specified, it will be added at the end of the filename after a dot. |
| 108 | * (This will be after any automatically added generation number.) |
| 109 | * <p> |
| 110 | * Thus if three processes were all trying to log to fred%u.%g.txt then |
| 111 | * they might end up using fred0.0.txt, fred1.0.txt, fred2.0.txt as |
| 112 | * the first file in their rotating sequences. |
| 113 | * <p> |
| 114 | * Note that the use of unique ids to avoid conflicts is only guaranteed |
| 115 | * to work reliably when using a local disk file system. |
| 116 | * |
| 117 | * @since 1.4 |
| 118 | */ |
| 119 | |
| 120 | public class FileHandler extends StreamHandler { |
| 121 | private MeteredStream meter; |
| 122 | private boolean append; |
| 123 | private int limit; // zero => no limit. |
| 124 | private int count; |
| 125 | private String pattern; |
| 126 | private String lockFileName; |
| 127 | private FileOutputStream lockStream; |
| 128 | private File files[]; |
| 129 | private static final int MAX_LOCKS = 100; |
| 130 | private static java.util.HashMap<String, String> locks = new java.util.HashMap<String, String>(); |
| 131 | |
| 132 | // A metered stream is a subclass of OutputStream that |
| 133 | // (a) forwards all its output to a target stream |
| 134 | // (b) keeps track of how many bytes have been written |
| 135 | private class MeteredStream extends OutputStream { |
| 136 | OutputStream out; |
| 137 | int written; |
| 138 | |
| 139 | MeteredStream(OutputStream out, int written) { |
| 140 | this.out = out; |
| 141 | this.written = written; |
| 142 | } |
| 143 | |
| 144 | public void write(int b) throws IOException { |
| 145 | out.write(b); |
| 146 | written++; |
| 147 | } |
| 148 | |
| 149 | public void write(byte buff[]) throws IOException { |
| 150 | out.write(buff); |
| 151 | written += buff.length; |
| 152 | } |
| 153 | |
| 154 | public void write(byte buff[], int off, int len) throws IOException { |
| 155 | out.write(buff,off,len); |
| 156 | written += len; |
| 157 | } |
| 158 | |
| 159 | public void flush() throws IOException { |
| 160 | out.flush(); |
| 161 | } |
| 162 | |
| 163 | public void close() throws IOException { |
| 164 | out.close(); |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | private void open(File fname, boolean append) throws IOException { |
| 169 | int len = 0; |
| 170 | if (append) { |
| 171 | len = (int)fname.length(); |
| 172 | } |
| 173 | FileOutputStream fout = new FileOutputStream(fname.toString(), append); |
| 174 | BufferedOutputStream bout = new BufferedOutputStream(fout); |
| 175 | meter = new MeteredStream(bout, len); |
| 176 | setOutputStream(meter); |
| 177 | } |
| 178 | |
| 179 | // Private method to configure a FileHandler from LogManager |
| 180 | // properties and/or default values as specified in the class |
| 181 | // javadoc. |
| 182 | private void configure() { |
| 183 | LogManager manager = LogManager.getLogManager(); |
| 184 | |
| 185 | String cname = getClass().getName(); |
| 186 | |
| 187 | pattern = manager.getStringProperty(cname + ".pattern", "%h/java%u.log"); |
| 188 | limit = manager.getIntProperty(cname + ".limit", 0); |
| 189 | if (limit < 0) { |
| 190 | limit = 0; |
| 191 | } |
| 192 | count = manager.getIntProperty(cname + ".count", 1); |
| 193 | if (count <= 0) { |
| 194 | count = 1; |
| 195 | } |
| 196 | append = manager.getBooleanProperty(cname + ".append", false); |
| 197 | setLevel(manager.getLevelProperty(cname + ".level", Level.ALL)); |
| 198 | setFilter(manager.getFilterProperty(cname + ".filter", null)); |
| 199 | setFormatter(manager.getFormatterProperty(cname + ".formatter", new XMLFormatter())); |
| 200 | try { |
| 201 | setEncoding(manager.getStringProperty(cname +".encoding", null)); |
| 202 | } catch (Exception ex) { |
| 203 | try { |
| 204 | setEncoding(null); |
| 205 | } catch (Exception ex2) { |
| 206 | // doing a setEncoding with null should always work. |
| 207 | // assert false; |
| 208 | } |
| 209 | } |
| 210 | } |
| 211 | |
| 212 | |
| 213 | /** |
| 214 | * Construct a default <tt>FileHandler</tt>. This will be configured |
| 215 | * entirely from <tt>LogManager</tt> properties (or their default values). |
| 216 | * <p> |
| 217 | * @exception IOException if there are IO problems opening the files. |
| 218 | * @exception SecurityException if a security manager exists and if |
| 219 | * the caller does not have <tt>LoggingPermission("control"))</tt>. |
| 220 | * @exception NullPointerException if pattern property is an empty String. |
| 221 | */ |
| 222 | public FileHandler() throws IOException, SecurityException { |
| 223 | checkAccess(); |
| 224 | configure(); |
| 225 | openFiles(); |
| 226 | } |
| 227 | |
| 228 | /** |
| 229 | * Initialize a <tt>FileHandler</tt> to write to the given filename. |
| 230 | * <p> |
| 231 | * The <tt>FileHandler</tt> is configured based on <tt>LogManager</tt> |
| 232 | * properties (or their default values) except that the given pattern |
| 233 | * argument is used as the filename pattern, the file limit is |
| 234 | * set to no limit, and the file count is set to one. |
| 235 | * <p> |
| 236 | * There is no limit on the amount of data that may be written, |
| 237 | * so use this with care. |
| 238 | * |
| 239 | * @param pattern the name of the output file |
| 240 | * @exception IOException if there are IO problems opening the files. |
| 241 | * @exception SecurityException if a security manager exists and if |
| 242 | * the caller does not have <tt>LoggingPermission("control")</tt>. |
| 243 | * @exception IllegalArgumentException if pattern is an empty string |
| 244 | */ |
| 245 | public FileHandler(String pattern) throws IOException, SecurityException { |
| 246 | if (pattern.length() < 1 ) { |
| 247 | throw new IllegalArgumentException(); |
| 248 | } |
| 249 | checkAccess(); |
| 250 | configure(); |
| 251 | this.pattern = pattern; |
| 252 | this.limit = 0; |
| 253 | this.count = 1; |
| 254 | openFiles(); |
| 255 | } |
| 256 | |
| 257 | /** |
| 258 | * Initialize a <tt>FileHandler</tt> to write to the given filename, |
| 259 | * with optional append. |
| 260 | * <p> |
| 261 | * The <tt>FileHandler</tt> is configured based on <tt>LogManager</tt> |
| 262 | * properties (or their default values) except that the given pattern |
| 263 | * argument is used as the filename pattern, the file limit is |
| 264 | * set to no limit, the file count is set to one, and the append |
| 265 | * mode is set to the given <tt>append</tt> argument. |
| 266 | * <p> |
| 267 | * There is no limit on the amount of data that may be written, |
| 268 | * so use this with care. |
| 269 | * |
| 270 | * @param pattern the name of the output file |
| 271 | * @param append specifies append mode |
| 272 | * @exception IOException if there are IO problems opening the files. |
| 273 | * @exception SecurityException if a security manager exists and if |
| 274 | * the caller does not have <tt>LoggingPermission("control")</tt>. |
| 275 | * @exception IllegalArgumentException if pattern is an empty string |
| 276 | */ |
| 277 | public FileHandler(String pattern, boolean append) throws IOException, SecurityException { |
| 278 | if (pattern.length() < 1 ) { |
| 279 | throw new IllegalArgumentException(); |
| 280 | } |
| 281 | checkAccess(); |
| 282 | configure(); |
| 283 | this.pattern = pattern; |
| 284 | this.limit = 0; |
| 285 | this.count = 1; |
| 286 | this.append = append; |
| 287 | openFiles(); |
| 288 | } |
| 289 | |
| 290 | /** |
| 291 | * Initialize a <tt>FileHandler</tt> to write to a set of files. When |
| 292 | * (approximately) the given limit has been written to one file, |
| 293 | * another file will be opened. The output will cycle through a set |
| 294 | * of count files. |
| 295 | * <p> |
| 296 | * The <tt>FileHandler</tt> is configured based on <tt>LogManager</tt> |
| 297 | * properties (or their default values) except that the given pattern |
| 298 | * argument is used as the filename pattern, the file limit is |
| 299 | * set to the limit argument, and the file count is set to the |
| 300 | * given count argument. |
| 301 | * <p> |
| 302 | * The count must be at least 1. |
| 303 | * |
| 304 | * @param pattern the pattern for naming the output file |
| 305 | * @param limit the maximum number of bytes to write to any one file |
| 306 | * @param count the number of files to use |
| 307 | * @exception IOException if there are IO problems opening the files. |
| 308 | * @exception SecurityException if a security manager exists and if |
| 309 | * the caller does not have <tt>LoggingPermission("control")</tt>. |
| 310 | * @exception IllegalArgumentException if limit < 0, or count < 1. |
| 311 | * @exception IllegalArgumentException if pattern is an empty string |
| 312 | */ |
| 313 | public FileHandler(String pattern, int limit, int count) |
| 314 | throws IOException, SecurityException { |
| 315 | if (limit < 0 || count < 1 || pattern.length() < 1) { |
| 316 | throw new IllegalArgumentException(); |
| 317 | } |
| 318 | checkAccess(); |
| 319 | configure(); |
| 320 | this.pattern = pattern; |
| 321 | this.limit = limit; |
| 322 | this.count = count; |
| 323 | openFiles(); |
| 324 | } |
| 325 | |
| 326 | /** |
| 327 | * Initialize a <tt>FileHandler</tt> to write to a set of files |
| 328 | * with optional append. When (approximately) the given limit has |
| 329 | * been written to one file, another file will be opened. The |
| 330 | * output will cycle through a set of count files. |
| 331 | * <p> |
| 332 | * The <tt>FileHandler</tt> is configured based on <tt>LogManager</tt> |
| 333 | * properties (or their default values) except that the given pattern |
| 334 | * argument is used as the filename pattern, the file limit is |
| 335 | * set to the limit argument, and the file count is set to the |
| 336 | * given count argument, and the append mode is set to the given |
| 337 | * <tt>append</tt> argument. |
| 338 | * <p> |
| 339 | * The count must be at least 1. |
| 340 | * |
| 341 | * @param pattern the pattern for naming the output file |
| 342 | * @param limit the maximum number of bytes to write to any one file |
| 343 | * @param count the number of files to use |
| 344 | * @param append specifies append mode |
| 345 | * @exception IOException if there are IO problems opening the files. |
| 346 | * @exception SecurityException if a security manager exists and if |
| 347 | * the caller does not have <tt>LoggingPermission("control")</tt>. |
| 348 | * @exception IllegalArgumentException if limit < 0, or count < 1. |
| 349 | * @exception IllegalArgumentException if pattern is an empty string |
| 350 | * |
| 351 | */ |
| 352 | public FileHandler(String pattern, int limit, int count, boolean append) |
| 353 | throws IOException, SecurityException { |
| 354 | if (limit < 0 || count < 1 || pattern.length() < 1) { |
| 355 | throw new IllegalArgumentException(); |
| 356 | } |
| 357 | checkAccess(); |
| 358 | configure(); |
| 359 | this.pattern = pattern; |
| 360 | this.limit = limit; |
| 361 | this.count = count; |
| 362 | this.append = append; |
| 363 | openFiles(); |
| 364 | } |
| 365 | |
| 366 | // Private method to open the set of output files, based on the |
| 367 | // configured instance variables. |
| 368 | private void openFiles() throws IOException { |
| 369 | LogManager manager = LogManager.getLogManager(); |
| 370 | manager.checkAccess(); |
| 371 | if (count < 1) { |
| 372 | throw new IllegalArgumentException("file count = " + count); |
| 373 | } |
| 374 | if (limit < 0) { |
| 375 | limit = 0; |
| 376 | } |
| 377 | |
| 378 | // We register our own ErrorManager during initialization |
| 379 | // so we can record exceptions. |
| 380 | InitializationErrorManager em = new InitializationErrorManager(); |
| 381 | setErrorManager(em); |
| 382 | |
| 383 | // Create a lock file. This grants us exclusive access |
| 384 | // to our set of output files, as long as we are alive. |
| 385 | int unique = -1; |
| 386 | for (;;) { |
| 387 | unique++; |
| 388 | if (unique > MAX_LOCKS) { |
| 389 | throw new IOException("Couldn't get lock for " + pattern); |
| 390 | } |
| 391 | // Generate a lock file name from the "unique" int. |
| 392 | lockFileName = generate(pattern, 0, unique).toString() + ".lck"; |
| 393 | // Now try to lock that filename. |
| 394 | // Because some systems (e.g. Solaris) can only do file locks |
| 395 | // between processes (and not within a process), we first check |
| 396 | // if we ourself already have the file locked. |
| 397 | synchronized(locks) { |
| 398 | if (locks.get(lockFileName) != null) { |
| 399 | // We already own this lock, for a different FileHandler |
| 400 | // object. Try again. |
| 401 | continue; |
| 402 | } |
| 403 | FileChannel fc; |
| 404 | try { |
| 405 | lockStream = new FileOutputStream(lockFileName); |
| 406 | fc = lockStream.getChannel(); |
| 407 | } catch (IOException ix) { |
| 408 | // We got an IOException while trying to open the file. |
| 409 | // Try the next file. |
| 410 | continue; |
| 411 | } |
| 412 | try { |
| 413 | FileLock fl = fc.tryLock(); |
| 414 | if (fl == null) { |
| 415 | // We failed to get the lock. Try next file. |
| 416 | continue; |
| 417 | } |
| 418 | // We got the lock OK. |
| 419 | } catch (IOException ix) { |
| 420 | // We got an IOException while trying to get the lock. |
| 421 | // This normally indicates that locking is not supported |
| 422 | // on the target directory. We have to proceed without |
| 423 | // getting a lock. Drop through. |
| 424 | } |
| 425 | // We got the lock. Remember it. |
| 426 | locks.put(lockFileName, lockFileName); |
| 427 | break; |
| 428 | } |
| 429 | } |
| 430 | |
| 431 | files = new File[count]; |
| 432 | for (int i = 0; i < count; i++) { |
| 433 | files[i] = generate(pattern, i, unique); |
| 434 | } |
| 435 | |
| 436 | // Create the initial log file. |
| 437 | if (append) { |
| 438 | open(files[0], true); |
| 439 | } else { |
| 440 | rotate(); |
| 441 | } |
| 442 | |
| 443 | // Did we detect any exceptions during initialization? |
| 444 | Exception ex = em.lastException; |
| 445 | if (ex != null) { |
| 446 | if (ex instanceof IOException) { |
| 447 | throw (IOException) ex; |
| 448 | } else if (ex instanceof SecurityException) { |
| 449 | throw (SecurityException) ex; |
| 450 | } else { |
| 451 | throw new IOException("Exception: " + ex); |
| 452 | } |
| 453 | } |
| 454 | |
| 455 | // Install the normal default ErrorManager. |
| 456 | setErrorManager(new ErrorManager()); |
| 457 | } |
| 458 | |
| 459 | // Generate a filename from a pattern. |
| 460 | private File generate(String pattern, int generation, int unique) throws IOException { |
| 461 | File file = null; |
| 462 | String word = ""; |
| 463 | int ix = 0; |
| 464 | boolean sawg = false; |
| 465 | boolean sawu = false; |
| 466 | while (ix < pattern.length()) { |
| 467 | char ch = pattern.charAt(ix); |
| 468 | ix++; |
| 469 | char ch2 = 0; |
| 470 | if (ix < pattern.length()) { |
| 471 | ch2 = Character.toLowerCase(pattern.charAt(ix)); |
| 472 | } |
| 473 | if (ch == '/') { |
| 474 | if (file == null) { |
| 475 | file = new File(word); |
| 476 | } else { |
| 477 | file = new File(file, word); |
| 478 | } |
| 479 | word = ""; |
| 480 | continue; |
| 481 | } else if (ch == '%') { |
| 482 | if (ch2 == 't') { |
| 483 | String tmpDir = System.getProperty("java.io.tmpdir"); |
| 484 | if (tmpDir == null) { |
| 485 | tmpDir = System.getProperty("user.home"); |
| 486 | } |
| 487 | file = new File(tmpDir); |
| 488 | ix++; |
| 489 | word = ""; |
| 490 | continue; |
| 491 | } else if (ch2 == 'h') { |
| 492 | file = new File(System.getProperty("user.home")); |
| 493 | if (isSetUID()) { |
| 494 | // Ok, we are in a set UID program. For safety's sake |
| 495 | // we disallow attempts to open files relative to %h. |
| 496 | throw new IOException("can't use %h in set UID program"); |
| 497 | } |
| 498 | ix++; |
| 499 | word = ""; |
| 500 | continue; |
| 501 | } else if (ch2 == 'g') { |
| 502 | word = word + generation; |
| 503 | sawg = true; |
| 504 | ix++; |
| 505 | continue; |
| 506 | } else if (ch2 == 'u') { |
| 507 | word = word + unique; |
| 508 | sawu = true; |
| 509 | ix++; |
| 510 | continue; |
| 511 | } else if (ch2 == '%') { |
| 512 | word = word + "%"; |
| 513 | ix++; |
| 514 | continue; |
| 515 | } |
| 516 | } |
| 517 | word = word + ch; |
| 518 | } |
| 519 | if (count > 1 && !sawg) { |
| 520 | word = word + "." + generation; |
| 521 | } |
| 522 | if (unique > 0 && !sawu) { |
| 523 | word = word + "." + unique; |
| 524 | } |
| 525 | if (word.length() > 0) { |
| 526 | if (file == null) { |
| 527 | file = new File(word); |
| 528 | } else { |
| 529 | file = new File(file, word); |
| 530 | } |
| 531 | } |
| 532 | return file; |
| 533 | } |
| 534 | |
| 535 | // Rotate the set of output files |
| 536 | private synchronized void rotate() { |
| 537 | Level oldLevel = getLevel(); |
| 538 | setLevel(Level.OFF); |
| 539 | |
| 540 | super.close(); |
| 541 | for (int i = count-2; i >= 0; i--) { |
| 542 | File f1 = files[i]; |
| 543 | File f2 = files[i+1]; |
| 544 | if (f1.exists()) { |
| 545 | if (f2.exists()) { |
| 546 | f2.delete(); |
| 547 | } |
| 548 | f1.renameTo(f2); |
| 549 | } |
| 550 | } |
| 551 | try { |
| 552 | open(files[0], false); |
| 553 | } catch (IOException ix) { |
| 554 | // We don't want to throw an exception here, but we |
| 555 | // report the exception to any registered ErrorManager. |
| 556 | reportError(null, ix, ErrorManager.OPEN_FAILURE); |
| 557 | |
| 558 | } |
| 559 | setLevel(oldLevel); |
| 560 | } |
| 561 | |
| 562 | /** |
| 563 | * Format and publish a <tt>LogRecord</tt>. |
| 564 | * |
| 565 | * @param record description of the log event. A null record is |
| 566 | * silently ignored and is not published |
| 567 | */ |
| 568 | public synchronized void publish(LogRecord record) { |
| 569 | if (!isLoggable(record)) { |
| 570 | return; |
| 571 | } |
| 572 | super.publish(record); |
| 573 | flush(); |
| 574 | if (limit > 0 && meter.written >= limit) { |
| 575 | // We performed access checks in the "init" method to make sure |
| 576 | // we are only initialized from trusted code. So we assume |
| 577 | // it is OK to write the target files, even if we are |
| 578 | // currently being called from untrusted code. |
| 579 | // So it is safe to raise privilege here. |
| 580 | AccessController.doPrivileged(new PrivilegedAction<Object>() { |
| 581 | public Object run() { |
| 582 | rotate(); |
| 583 | return null; |
| 584 | } |
| 585 | }); |
| 586 | } |
| 587 | } |
| 588 | |
| 589 | /** |
| 590 | * Close all the files. |
| 591 | * |
| 592 | * @exception SecurityException if a security manager exists and if |
| 593 | * the caller does not have <tt>LoggingPermission("control")</tt>. |
| 594 | */ |
| 595 | public synchronized void close() throws SecurityException { |
| 596 | super.close(); |
| 597 | // Unlock any lock file. |
| 598 | if (lockFileName == null) { |
| 599 | return; |
| 600 | } |
| 601 | try { |
| 602 | // Closing the lock file's FileOutputStream will close |
| 603 | // the underlying channel and free any locks. |
| 604 | lockStream.close(); |
| 605 | } catch (Exception ex) { |
| 606 | // Problems closing the stream. Punt. |
| 607 | } |
| 608 | synchronized(locks) { |
| 609 | locks.remove(lockFileName); |
| 610 | } |
| 611 | new File(lockFileName).delete(); |
| 612 | lockFileName = null; |
| 613 | lockStream = null; |
| 614 | } |
| 615 | |
| 616 | private static class InitializationErrorManager extends ErrorManager { |
| 617 | Exception lastException; |
| 618 | public void error(String msg, Exception ex, int code) { |
| 619 | lastException = ex; |
| 620 | } |
| 621 | } |
| 622 | |
| 623 | // Private native method to check if we are in a set UID program. |
| 624 | private static native boolean isSetUID(); |
| 625 | } |