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 d = new File(directory);
        if (!d.isDirectory()) {
            directory = d.getParent() + File.separator;
        }


        DailyRollingFileAppender fa = new DailyRollingFileAppender();
        fa.setName(harvesterName);
        String logfile = directory + "harvester_" + packageType + "_"
                         + harvesterName + "_"
                         + dateFormat.format(new Date(System.currentTimeMillis()))
                         + ".log";
        fa.setFile(logfile);
        fa.setLayout(new PatternLayout("%d{ISO8601} %-5p [%c] - %m%n"));
        fa.setThreshold(log.getThreshold());
        fa.setAppend(true);
        fa.activateOptions();


        log.setAppender(fa);


        return logfile;
    }

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 *
 * @version $Revision: 1.3 $ $Date: 2004/03/10 09:59:30 $
 */
public class DailyRollingFileAppenderService extends FileAppenderService {
    public DailyRollingFileAppenderService(ServerInfo serverInfo) {
        super(serverInfo, new DailyRollingFileAppender());
    }

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 *
 * @version $Revision: 1.5 $ $Date: 2004/07/12 06:07:50 $
 */
public class DailyRollingFileAppenderService extends FileAppenderService {
    public DailyRollingFileAppenderService(ServerInfo serverInfo) {
        super(serverInfo, new DailyRollingFileAppender());
    }

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  SshLog(final Provider<SshSession> session, final Provider<Context> context,
      final SitePaths site, @GerritServerConfig Config config) {
    this.session = session;
    this.context = context;


    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.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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      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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            }


            m_configLogger = new Thread(new ConfigLogging());
            m_configLogger.start();


            DailyRollingFileAppender dailyAppender = null;
            Enumeration<?> appenders = Logger.getRootLogger().getAllAppenders();
            while (appenders.hasMoreElements()) {
                Appender appender = (Appender) appenders.nextElement();
                if (appender instanceof DailyRollingFileAppender){
                    dailyAppender = (DailyRollingFileAppender) appender;
                }
            }
            final DailyRollingFileAppender dailyRollingFileAppender = dailyAppender;


            Field field = null;
            if (dailyRollingFileAppender != null) {
                try {
                    field = dailyRollingFileAppender.getClass().getDeclaredField("nextCheck");
                    field.setAccessible(true);
                } catch (NoSuchFieldException e) {
                    hostLog.error("Failed to set daily system info logging: " + e.getMessage());
                }
            }

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        C.setImmediateFlush(true);
        C.activateOptions();
        logger.addAppender(C);
      }
      // Setup file logging
      DailyRollingFileAppender A = new DailyRollingFileAppender();
      A.setFile(logFilePath);
      A.setDatePattern(fileDatePattern);
      A.setLayout(layout);
      A.activateOptions();
      logger.addAppender(A);
    }
    return logger;
  }

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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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    public static void setupLogger(Properties properties) throws IOException {


        Layout layout = new PatternLayout("%d{yyyy-MM-dd HH:mm:ss} %5p: %m%n");


        Appender appender = new DailyRollingFileAppender(
                layout, properties.getProperty("logger.file"), "'.'yyyyMMdd");


        LogManager.resetConfiguration();
        LogManager.getRootLogger().addAppender(new NullAppender());

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