Examples of org.apache.log4j.DailyRollingFileAppender

org.apache.log4j.DailyRollingFileAppender

DailyRollingFileAppender extends {@link FileAppender} so that theunderlying file is rolled over at a user chosen frequency.

The rolling schedule is specified by the DatePattern option. This pattern should follow the {@link SimpleDateFormat}conventions. In particular, you must escape literal text within a pair of single quotes. A formatted version of the date pattern is used as the suffix for the rolled file name.

For example, if the File option is set to /foo/bar.log and the DatePattern set to '.'yyyy-MM-dd, on 2001-02-16 at midnight, the logging file /foo/bar.log will be copied to /foo/bar.log.2001-02-16 and logging for 2001-02-17 will continue in /foo/bar.log until it rolls over the next day.

Is is possible to specify monthly, weekly, half-daily, daily, hourly, or minutely rollover schedules.

DatePattern	Rollover schedule	Example
`'.'yyyy-MM`	Rollover at the beginning of each month	Assuming the first day of the week is Sunday, at Sunday 00:00, March 25th, 2001, `/foo/bar.log` will be copied to `/foo/bar.log.2001-03`. Logging for the month of April will be output to `/foo/bar.log` until it rolls over at the beginning of May.
`'.'yyyy-ww`	Rollover at the first day of each week. The first day of the week depends on the locale.	At midnight, on March 31st, 2001, `/foo/bar.log` will be copied to `/foo/bar.log.2001-08`. Logging for the 9th week of 2001 will be output to `/foo/bar.log` until it is rolled over the next week.
`'.'yyyy-MM-dd`	Rollover at midnight each day.	At midnight, on March 9th, 2001, `/foo/bar.log` will be copied to `/foo/bar.log.2001-03-08`. Logging for the 9th day of March will be output to `/foo/bar.log` until it is rolled over the next day.
`'.'yyyy-MM-dd-a`	Rollover at midnight and midday of each day.	At noon, on March 9th, 2001, `/foo/bar.log` will be copied to `/foo/bar.log.2001-03-09-AM`. Logging for the afternoon of the 9th will be output to `/foo/bar.log` until it is rolled over the next morning, i.e at midnight 00:00.
`'.'yyyy-MM-dd-HH`	Rollover at the top of every hour.	At approximately 11:00,000, on March 9th, 2001, `/foo/bar.log` will be copied to `/foo/bar.log.2001-03-09-10`. Logging for the 11th hour of the 9th of March will be output to `/foo/bar.log` until it is rolled over at the beginning of the next hour.
`'.'yyyy-MM-dd-HH-mm`	Rollover at the beginning of every minute.	At approximately 11:23,000, on March 9th, 2001, `/foo/bar.log` will be copied to `/foo/bar.log.2001-03-09-10-22`. Logging for the minute of 11:23 (9th of March) will be output to `/foo/bar.log` until it is rolled over the next minute.

Do not use the colon ":" character in anywhere in the DatePattern option. The text before the colon is interpeted as the protocol specificaion of a URL which is probably not what you want. @author Eirik Lygre @author Ceki Gülcü

        File file = TestFileUtils.createTempFile(this, ".log", "QpidCompositeRollingAppender");
        File backUpFile = File.createTempFile(file.getName() + ".", ".1." + LogFileHelper.GZIP_EXTENSION);
        _appendersFiles.put(QpidCompositeRollingAppender.class.getSimpleName(), Arrays.asList(file, backUpFile));


        FileAppender fileAppender = new FileAppender();
        DailyRollingFileAppender dailyRollingFileAppender = new DailyRollingFileAppender();
        RollingFileAppender rollingFileAppender = new RollingFileAppender();
        ExternallyRolledFileAppender externallyRolledFileAppender = new ExternallyRolledFileAppender();
        QpidCompositeRollingAppender qpidCompositeRollingAppender = new QpidCompositeRollingAppender();
        qpidCompositeRollingAppender.setbackupFilesToPath(_compositeRollingAppenderBackupFolder.getPath());

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      String username = System.getProperty("user.name");
      logFile = String.format("%s%shadoop-%s-fairscheduler.log",
          logDir, File.separator, username);
      logDisabled = false;
      PatternLayout layout = new PatternLayout("%d{ISO8601}\t%m%n");
      appender = new DailyRollingFileAppender(layout, logFile, "'.'yyyy-MM-dd");
      appender.activateOptions();
      LOG.info("Initialized fair scheduler event log, logging to " + logFile);
    } catch (IOException e) {
      LOG.error(
          "Failed to initialize fair scheduler event log. Disabling it.", e);

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                    {
                        // fallback to defaults
                        String logName = String.format("mule-app-%s.log", appName);
                        File logDir = new File(MuleContainerBootstrapUtils.getMuleHome(), "logs");
                        File logFile = new File(logDir, logName);
                        DailyRollingFileAppender fileAppender = new DailyRollingFileAppender(new PatternLayout(PATTERN_LAYOUT), logFile.getAbsolutePath(), "'.'yyyy-MM-dd");
                        fileAppender.setAppend(true);
                        fileAppender.activateOptions();
                        root.addAppender(fileAppender);
                    }
                    else
                    {
                        configureFrom(appLogConfig, repository);

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  public LoggingSearcher(ISearcher searcher) {
        this.searcher = searcher;


        // We add a special logger to write to the file the log consumers expect to find.
        DailyRollingFileAppender appender = new DailyRollingFileAppender();
        appender.setName("QueriesAppender");
        appender.setFile("logs/queries.log");
        appender.setDatePattern("'.'yyyy-MM-dd");
        PatternLayout layout = new PatternLayout();
        layout.setConversionPattern("%m%n");
        appender.setLayout(layout);
        appender.activateOptions();
        logger.setLevel(Level.INFO);    
        logger.addAppender(appender);
        logger.setAdditivity(true);
        
        // We need to filter this class out of any root appenders, otherwise the queries are logged through all of them.

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        this.log.setLevel(org.apache.log4j.Level.toLevel(_wgaConfiguration.getApplicationLogLevel()));
        if (_wgaConfiguration.getApplicationLogDirectory() != null) {
            File loggingDir = new File(_wgaConfiguration.getApplicationLogDirectory());
            if (loggingDir.exists()) {
                try {
                    Appender fileAppender = new DailyRollingFileAppender(new PatternLayout("%d{HH:mm:ss} %p %m\n"), loggingDir.getAbsolutePath() + "/" + "wga.log", "yyyy-MM-dd");
                    this.log.addAppender(fileAppender);
                }
                catch (IOException e) {
                    this.log.error("Error creating application log file", e);
                }

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    }


    final PatternLayout layout = new PatternLayout();
    layout.setConversionPattern("[%d] %-5p %c %x: %m%n");


    final DailyRollingFileAppender dst = new DailyRollingFileAppender();
    dst.setName(LOG_NAME);
    dst.setLayout(layout);
    dst.setEncoding("UTF-8");
    dst.setFile(new File(resolve(logdir), LOG_NAME).getPath());
    dst.setImmediateFlush(true);
    dst.setAppend(true);
    dst.setThreshold(Level.INFO);
    dst.setErrorHandler(new DieErrorHandler());
    dst.activateOptions();
    dst.setErrorHandler(new OnlyOnceErrorHandler());


    final Logger root = LogManager.getRootLogger();
    root.removeAllAppenders();
    root.addAppender(dst);

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  private static final String P_USER_AGENT = "User-Agent";


  private final AsyncAppender async;


  HttpLog(final SitePaths site, final Config config) {
    final DailyRollingFileAppender dst = new DailyRollingFileAppender();
    dst.setName(LOG_NAME);
    dst.setLayout(new MyLayout());
    dst.setEncoding("UTF-8");
    dst.setFile(new File(resolve(site.logs_dir), LOG_NAME).getPath());
    dst.setImmediateFlush(true);
    dst.setAppend(true);
    dst.setThreshold(Level.INFO);
    dst.setErrorHandler(new DieErrorHandler());
    dst.activateOptions();
    dst.setErrorHandler(new LogLogHandler());


    async = new AsyncAppender();
    async.setBlocking(true);
    async.setBufferSize(config.getInt("core", "asyncLoggingBufferSize", 64));
    async.setLocationInfo(false);

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      String username = System.getProperty("user.name");
      logFile = String.format("%s%shadoop-%s-fairscheduler-%s.log",
          logDir, File.separator, username, jobtrackerHostname);
      logDisabled = false;
      PatternLayout layout = new PatternLayout("%d{ISO8601}\t%m%n");
      appender = new DailyRollingFileAppender(layout, logFile, "'.'yyyy-MM-dd");
      appender.activateOptions();
      LOG.info("Initialized fair scheduler event log, logging to " + logFile);
    } catch (IOException e) {
      LOG.error(
          "Failed to initialize fair scheduler event log. Disabling it.", e);

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  {
    //logger configuration
    String pattern = "[%d{yyyy-MM-dd HH:mm:ss} %-4r][%-5p] %m%n";
      PatternLayout layout = new PatternLayout(pattern);
      //file will be rolled over every day
      DailyRollingFileAppender appender=null;
      try
    {
      File logDir = new File("log");
      if(!logDir.exists())
        logDir.mkdir();
        appender = new DailyRollingFileAppender(layout, "log/qwertomailer.log", "'.'yyyy-MM-dd'.log'");
      } catch (IOException e)
    {
      logger.error(e.getMessage());
      return;
    }

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        File file = TestFileUtils.createTempFile(this, ".log", "QpidCompositeRollingAppender");
        File backUpFile = File.createTempFile(file.getName() + ".", ".1." + LogFileHelper.GZIP_EXTENSION);
        _appendersFiles.put(QpidCompositeRollingAppender.class.getSimpleName(), Arrays.asList(file, backUpFile));


        FileAppender fileAppender = new FileAppender();
        DailyRollingFileAppender dailyRollingFileAppender = new DailyRollingFileAppender();
        RollingFileAppender rollingFileAppender = new RollingFileAppender();
        ExternallyRolledFileAppender externallyRolledFileAppender = new ExternallyRolledFileAppender();
        QpidCompositeRollingAppender qpidCompositeRollingAppender = new QpidCompositeRollingAppender();
        qpidCompositeRollingAppender.setbackupFilesToPath(_compositeRollingAppenderBackupFolder.getPath());

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