Examples of java.util.logging.FileHandler$InitializationErrorManager

java.util.logging.FileHandler
Simple file logging Handler.
The FileHandler can either write to a specified file, or it can write to a rotating set of files.
For a rotating set of files, as each file reaches a given size limit, it is closed, rotated out, and a new file opened. Successively older files are named by adding "0", "1", "2", etc into the base filename.
By default buffering is enabled in the IO libraries but each log record is flushed out when it is complete.
By default the XMLFormatter class is used for formatting.
Configuration: By default each FileHandler is initialized using the following LogManager configuration properties. If properties are not defined (or have invalid values) then the specified default values are used.
- java.util.logging.FileHandler.level specifies the default level for the Handler (defaults to Level.ALL).
- java.util.logging.FileHandler.filter specifies the name of a Filter class to use (defaults to no Filter).
- java.util.logging.FileHandler.formatter specifies the name of a Formatter class to use (defaults to java.util.logging.XMLFormatter)
- java.util.logging.FileHandler.encoding the name of the character set encoding to use (defaults to the default platform encoding).
- java.util.logging.FileHandler.limit specifies an approximate maximum amount to write (in bytes) to any one file. If this is zero, then there is no limit. (Defaults to no limit).
- java.util.logging.FileHandler.count specifies how many output files to cycle through (defaults to 1).
- java.util.logging.FileHandler.pattern specifies a pattern for generating the output file name. See below for details. (Defaults to "%h/java%u.log").
- java.util.logging.FileHandler.append specifies whether the FileHandler should append onto any existing files (defaults to false).
A pattern consists of a string that includes the following special components that will be replaced at runtime:
- "/" the local pathname separator
- "%t" the system temporary directory
- "%h" the value of the "user.home" system property
- "%g" the generation number to distinguish rotated logs
- "%u" a unique number to resolve conflicts
- "%%" translates to a single percent sign "%"
If no "%g" field has been specified and the file count is greater than one, then the generation number will be added to the end of the generated filename, after a dot.
Thus for example a pattern of "%t/java%g.log" with a count of 2 would typically cause log files to be written on Solaris to /var/tmp/java0.log and /var/tmp/java1.log whereas on Windows 95 they would be typically written to C:\TEMP\java0.log and C:\TEMP\java1.log
Generation numbers follow the sequence 0, 1, 2, etc.
Normally the "%u" unique field is set to 0. However, if the FileHandler tries to open the filename and finds the file is currently in use by another process it will increment the unique number field and try again. This will be repeated until FileHandler finds a file name that is not currently in use. If there is a conflict and no "%u" field has been specified, it will be added at the end of the filename after a dot. (This will be after any automatically added generation number.)
Thus if three processes were all trying to log to fred%u.%g.txt then they might end up using fred0.0.txt, fred1.0.txt, fred2.0.txt as the first file in their rotating sequences.
Note that the use of unique ids to avoid conflicts is only guaranteed to work reliably when using a local disk file system. @version 1.36, 04/07/06 @since 1.4

                    // could exit loop here, but keep on going for robustness (might be more than on handler)
                }
            }
            // set default logging
            Logger.getLogger("").setLevel(logLevel);
            Handler fileHandler = new FileHandler(logFilePath);
            fileHandler.setFormatter(DETAIL_FORMATTER);
            Logger.getLogger("").addHandler(fileHandler);
            logger.log(Level.INFO, "Logging Service configured");
        } catch (IOException ioe) {
            logger.log(Level.WARNING, "Could not set logging configuration", ioe);
        }

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      // For more pattern info, see
      // http://docs.oracle.com/javase/6/docs/api/java/util/logging/FileHandler.html
      String logPattern = directory + File.separator + LOG_PREFIX
          + getTimestamp() + ".%u.%g.log";


      FileHandler handler = new FileHandler(logPattern, LIMIT_PER_FILE,
          MAX_NUM_LOG_FILES, APPEND);


      handler.setFormatter(new SimpleFormatter());
      


      this.logger = Logger.getLogger(LOGGER_NAME);
      this.logger.addHandler(handler);
      this.logger.setUseParentHandlers(SEND_TO_PARENT_LOGGER);

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        // Setup file logger
        try
        {
            String pattern = getDefaultLogFilePattern();
            ensureParentDirectoryExists(pattern);
            FileHandler handler = new FileHandler(pattern, LOGGING_LIMIT, LOGGING_LOOP_COUNT);
            handler.setFormatter(new TinyFormatter());
            aLogger.addHandler(handler);
        } catch (IOException e)
        {
            System.err.println(MessageFormat.format(Strings.error("logging.failed.to.configure"),
                e.getLocalizedMessage()));

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      myServer.setConsoleLoggingToMicro();
    }


    //setup logger to log to file
    Logger logger = null;
    FileHandler txtLog = null;
    final String logDir = CmpConfiguration.getTCPLogDir();
    final File logFile = new File(logDir + "/");
    if(!logFile.canRead()) {
      logFile.mkdir();
    }
    try  {
      logger = Logger.getLogger("");
      logger.setLevel(Level.FINEST);


      logger = Logger.getLogger("cmptcpserver");
      logger.setLevel(Level.FINEST); 
      txtLog = new FileHandler(logDir+"/cmptcpserver.log");
      //reduce info 
      txtLog.setFormatter(new org.quickserver.util.logging.MicroFormatter());
      logger.addHandler(txtLog);


      myServer.setAppLogger(logger); //imp


      //myServer.setConsoleLoggingToMicro();

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        }
    }


    public static void main(String args[]) throws Exception {
        if (args.length > 0 && args[0].equalsIgnoreCase("-debug")) {
            Handler fh = new FileHandler("reJ.log");
            Logger.getLogger("net.sf.rej").addHandler(fh);
          Logger.getLogger("net.sf.rej").setLevel(Level.FINEST);          
        } else if (args.length > 0 && args[0].equalsIgnoreCase("-nolog")) {
          // no logging
        } else {
            Handler fh = new FileHandler("reJ.log");
            Logger.getLogger("net.sf.rej").addHandler(fh);
          Logger.getLogger("net.sf.rej").setLevel(Level.WARNING);
        }


        SwingUtilities.invokeLater(new Runnable() {

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  private DatabaseConnection()
  {
    logger.setLevel(Level.ALL);
    try 
    {
      fh = new FileHandler( "log.txt" );
      logger.addHandler(fh);
      fh.setFormatter(new SimpleFormatter());
    }   
    catch (SecurityException exception) 
    {

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  }


  public static void initLogger(Logger logger, String outputLogPath) {
    try {
      logger.setUseParentHandlers(false);
      FileHandler fh = new FileHandler(outputLogPath);
      fh.setFormatter(new TextFormatter());
      fh.setLevel(Level.INFO);
      logger.addHandler(fh);
    }
    catch (SecurityException se) {
      se.printStackTrace();
    }

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    public void setCount(int count) {
        this._count = count;
    }
    
    protected Handler createNativeHandler() throws Exception {
        final FileHandler fhandler = new FileHandler(_pattern, _limit, _count, _append);
        //MemoryHandler mhandler = new MemoryHandler(fhandler, 1000, Level.SEVERE);
        return fhandler;
    }

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    if (config.getBoolean(null, ConfigurationValueBoolean.DEBUG_DETAILS)) {
      Logger.getLogger("org.wikipediacleaner").setLevel(Level.FINE);
    }
    if (config.getBoolean(null, ConfigurationValueBoolean.DEBUG_FILE)) {
      try {
        Handler fh = new FileHandler("%t/WPCleaner.log");
        fh.setFormatter(new SimpleFormatter());
        Logger.getLogger("").addHandler(fh);
      } catch (Exception e) {
        // Nothing to do
      }
    }

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    if (config.getBoolean(null, ConfigurationValueBoolean.DEBUG_DETAILS)) {
      Logger.getLogger("org.wikipediacleaner").setLevel(Level.FINE);
    }
    if (config.getBoolean(null, ConfigurationValueBoolean.DEBUG_FILE)) {
      try {
        Handler fh = new FileHandler("WPCleanerBot.log");
        fh.setFormatter(new SimpleFormatter());
        Logger.getLogger("").addHandler(fh);
      } catch (Exception e) {
        // Nothing to do
      }
    }

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