package com.xxx.xxx.util;  import java.io.File;
import java.io.IOException;
import java.io.Writer;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.Locale;
import java.util.TimeZone;  import org.apache.log4j.FileAppender;
import org.apache.log4j.Layout;
import org.apache.log4j.helpers.CountingQuietWriter;
import org.apache.log4j.helpers.LogLog;
import org.apache.log4j.helpers.OptionConverter;
import org.apache.log4j.spi.LoggingEvent;  /** * MyDailyRollingFileAppender extends {@link FileAppender} so that the underlying * file is rolled over at a user chosen frequency. *  * <p> * The rolling schedule is specified by the <b>DatePattern</b> option. This * pattern should follow the {@link SimpleDateFormat} conventions. In * particular, you <em>must</em> 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. *  * <p> * For example, if the <b>File</b> option is set to <code>/foo/bar.log</code> * and the <b>DatePattern</b> set to <code>'.'yyyy-MM-dd</code>, on 2001-02-16 * at midnight, the logging file <code>/foo/bar.log</code> will be copied to * <code>/foo/bar.log.2001-02-16</code> and logging for 2001-02-17 will continue * in <code>/foo/bar.log</code> until it rolls over the next day. *  * <p> * Is is possible to specify monthly, weekly, half-daily, daily, hourly, or * minutely rollover schedules. *  * <p> * <table border="1" cellpadding="2"> * <tr> * <th>DatePattern</th> * <th>Rollover schedule</th> * <th>Example</th> *  * <tr> * <td><code>'.'yyyy-MM</code> * <td>Rollover at the beginning of each month</td> *  * <td>At midnight of May 31st, 2002 <code>/foo/bar.log</code> will be copied to * <code>/foo/bar.log.2002-05</code>. Logging for the month of June will be * output to <code>/foo/bar.log</code> until it is also rolled over the next * month. *  * <tr> * <td><code>'.'yyyy-ww</code> *  * <td>Rollover at the first day of each week. The first day of the week depends * on the locale.</td> *  * <td>Assuming the first day of the week is Sunday, on Saturday midnight, June * 9th 2002, the file <i>/foo/bar.log</i> will be copied to * <i>/foo/bar.log.2002-23</i>. Logging for the 24th week of 2002 will be output * to <code>/foo/bar.log</code> until it is rolled over the next week. *  * <tr> * <td><code>'.'yyyy-MM-dd</code> *  * <td>Rollover at midnight each day.</td> *  * <td>At midnight, on March 8th, 2002, <code>/foo/bar.log</code> will be copied * to <code>/foo/bar.log.2002-03-08</code>. Logging for the 9th day of March * will be output to <code>/foo/bar.log</code> until it is rolled over the next * day. *  * <tr> * <td><code>'.'yyyy-MM-dd-a</code> *  * <td>Rollover at midnight and midday of each day.</td> *  * <td>At noon, on March 9th, 2002, <code>/foo/bar.log</code> will be copied to * <code>/foo/bar.log.2002-03-09-AM</code>. Logging for the afternoon of the 9th * will be output to <code>/foo/bar.log</code> until it is rolled over at * midnight. *  * <tr> * <td><code>'.'yyyy-MM-dd-HH</code> *  * <td>Rollover at the top of every hour.</td> *  * <td>At approximately 11:00.000 o'clock on March 9th, 2002, * <code>/foo/bar.log</code> will be copied to * <code>/foo/bar.log.2002-03-09-10</code>. Logging for the 11th hour of the 9th * of March will be output to <code>/foo/bar.log</code> until it is rolled over * at the beginning of the next hour. *  *  * <tr> * <td><code>'.'yyyy-MM-dd-HH-mm</code> *  * <td>Rollover at the beginning of every minute.</td> *  * <td>At approximately 11:23,000, on March 9th, 2001, <code>/foo/bar.log</code> * will be copied to <code>/foo/bar.log.2001-03-09-10-22</code>. Logging for the * minute of 11:23 (9th of March) will be output to <code>/foo/bar.log</code> * until it is rolled over the next minute. *  * </table> *  * <p> * Do not use the colon ":" character in anywhere in the <b>DatePattern</b> * option. The text before the colon is interpeted as the protocol specificaion * of a URL which is probably not what you want. */
public class MyDailyRollingFileAppender extends FileAppender {  // The code assumes that the following constants are in a increasing  // sequence.  static final int TOP_OF_TROUBLE = -1;  static final int TOP_OF_MINUTE = 0;  static final int TOP_OF_HOUR = 1;  static final int HALF_DAY = 2;  static final int TOP_OF_DAY = 3;  static final int TOP_OF_WEEK = 4;  static final int TOP_OF_MONTH = 5;  /** * The default maximum file size is 10MB. */  protected long maxFileSize = 10 * 1024 * 1024;  /** * There is one backup file by default. */  protected int maxBackupIndex = 1;  /** * The date pattern. By default, the pattern is set to "'.'yyyy-MM-dd" * meaning daily rollover. */  private String datePattern = "'.'yyyy-MM-dd";  /** * The log file will be renamed to the value of the scheduledFilename * variable when the next interval is entered. For example, if the rollover * period is one hour, the log file will be renamed to the value of * "scheduledFilename" at the beginning of the next hour. *  * The precise time when a rollover occurs depends on logging activity. */  private String scheduledFilename;  /** * The next time we estimate a rollover should occur. */  private long nextCheck = System.currentTimeMillis() - 1;  Date now = new Date();  SimpleDateFormat sdf;  RollingCalendar rc = new RollingCalendar();  int checkPeriod = TOP_OF_TROUBLE;  // The gmtTimeZone is used only in computeCheckPeriod() method.  static final TimeZone gmtTimeZone = TimeZone.getTimeZone("GMT");  /** * The default constructor does nothing. */  public MyDailyRollingFileAppender() {  }  /** * Instantiate a <code>MyDailyRollingFileAppender</code> and open the file * designated by <code>filename</code>. The opened filename will become the * ouput destination for this appender. */  public MyDailyRollingFileAppender(Layout layout, String filename,  String datePattern) throws IOException {  super(layout, filename, true);  this.datePattern = datePattern;  activateOptions();  }  /** * Get the maximum size that the output file is allowed to reach before * being rolled over to backup files. *  * @since 1.1 */  public long getMaximumFileSize() {  return maxFileSize;  }  /** * Set the maximum size that the output file is allowed to reach before * being rolled over to backup files. *  * <p> * This method is equivalent to {@link #setMaxFileSize} except that it is * required for differentiating the setter taking a <code>long</code> * argument from the setter taking a <code>String</code> argument by the * JavaBeans {@link java.beans.Introspector Introspector}. *  * @see #setMaxFileSize(String) */  public void setMaximumFileSize(long maxFileSize) {  this.maxFileSize = maxFileSize;  }  /** * Set the maximum size that the output file is allowed to reach before * being rolled over to backup files. *  * <p> * In configuration files, the <b>MaxFileSize</b> option takes an long * integer in the range 0 - 2^63. You can specify the value with the * suffixes "KB", "MB" or "GB" so that the integer is interpreted being * expressed respectively in kilobytes, megabytes or gigabytes. For example, * the value "10KB" will be interpreted as 10240. */  public void setMaxFileSize(String value) {  maxFileSize = OptionConverter.toFileSize(value, maxFileSize + 1);  }  /** * Returns the value of the <b>MaxBackupIndex</b> option. */  public int getMaxBackupIndex() {  return maxBackupIndex;  }  /** * Set the maximum number of backup files to keep around. *  * <p> * The <b>MaxBackupIndex</b> option determines how many backup files are * kept before the oldest is erased. This option takes a positive integer * value. If set to zero, then there will be no backup files and the log * file will be truncated when it reaches <code>MaxFileSize</code>. */  public void setMaxBackupIndex(int maxBackups) {  this.maxBackupIndex = maxBackups;  }  /** * The <b>DatePattern</b> takes a string in the same format as expected by * {@link SimpleDateFormat}. This options determines the rollover schedule. */  public void setDatePattern(String pattern) {  datePattern = pattern;  }  /** Returns the value of the <b>DatePattern</b> option. */  public String getDatePattern() {  return datePattern;  }  public void activateOptions() {  super.activateOptions();  if (datePattern != null && fileName != null) {  now.setTime(System.currentTimeMillis());  sdf = new SimpleDateFormat(datePattern);  int type = computeCheckPeriod();  printPeriodicity(type);  rc.setType(type);  File file = new File(fileName);  scheduledFilename = fileName  + sdf.format(new Date(file.lastModified()));  } else {  LogLog.error("Either File or DatePattern options are not set for appender ["  + name + "].");  }  }  void printPeriodicity(int type) {  switch (type) {  case TOP_OF_MINUTE:  LogLog.debug("Appender [" + name + "] to be rolled every minute.");  break;  case TOP_OF_HOUR:  LogLog.debug("Appender [" + name  + "] to be rolled on top of every hour.");  break;  case HALF_DAY:  LogLog.debug("Appender [" + name  + "] to be rolled at midday and midnight.");  break;  case TOP_OF_DAY:  LogLog.debug("Appender [" + name + "] to be rolled at midnight.");  break;  case TOP_OF_WEEK:  LogLog.debug("Appender [" + name  + "] to be rolled at start of week.");  break;  case TOP_OF_MONTH:  LogLog.debug("Appender [" + name  + "] to be rolled at start of every month.");  break;  default:  LogLog.warn("Unknown periodicity for appender [" + name + "].");  }  }  // This method computes the roll over period by looping over the  // periods, starting with the shortest, and stopping when the r0 is  // different from from r1, where r0 is the epoch formatted according  // the datePattern (supplied by the user) and r1 is the  // epoch+nextMillis(i) formatted according to datePattern. All date  // formatting is done in GMT and not local format because the test  // logic is based on comparisons relative to 1970-01-01 00:00:00  // GMT (the epoch).  int computeCheckPeriod() {  RollingCalendar rollingCalendar = new RollingCalendar(gmtTimeZone,  Locale.ENGLISH);  // set sate to 1970-01-01 00:00:00 GMT  Date epoch = new Date(0);  if (datePattern != null) {  for (int i = TOP_OF_MINUTE; i <= TOP_OF_MONTH; i++) {  SimpleDateFormat simpleDateFormat = new SimpleDateFormat(  datePattern);  simpleDateFormat.setTimeZone(gmtTimeZone); // do all date  // formatting in GMT  String r0 = simpleDateFormat.format(epoch);  rollingCalendar.setType(i);  Date next = new Date(rollingCalendar.getNextCheckMillis(epoch));  String r1 = simpleDateFormat.format(next);  // System.out.println("Type = "+i+", r0 = "+r0+", r1 = "+r1);  if (r0 != null && r1 != null && !r0.equals(r1)) {  return i;  }  }  }  return TOP_OF_TROUBLE; // Deliberately head for trouble...
    }  /** * Implements the usual roll over behaviour. *  * <p> * If <code>MaxBackupIndex</code> is positive, then files { * <code>File.1</code>, ..., <code>File.MaxBackupIndex -1</code> are renamed * to {<code>File.2</code>, ..., <code>File.MaxBackupIndex</code> . * Moreover, <code>File</code> is renamed <code>File.1</code> and closed. A * new <code>File</code> is created to receive further log output. *  * <p> * If <code>MaxBackupIndex</code> is equal to zero, then the * <code>File</code> is truncated with no backup files created. */  public// synchronization not necessary since doAppend is alreasy synched  void sizeRollOver() {  File target;  File file;  LogLog.debug("rolling over count="  + ((CountingQuietWriter) qw).getCount());  LogLog.debug("maxBackupIndex=" + maxBackupIndex);  String datedFilename = fileName + sdf.format(now);  if (maxBackupIndex > 0) {  // Delete the oldest file, to keep Windows happy.  file = new File(datedFilename + '.' + maxBackupIndex);  if (file.exists())  file.delete();  // Map {(maxBackupIndex - 1), ..., 2, 1} to {maxBackupIndex, ..., 3,  // 2}  for (int i = maxBackupIndex - 1; i >= 1; i--) {  file = new File(datedFilename + "." + i);  if (file.exists()) {  target = new File(datedFilename + '.' + (i + 1));  LogLog.debug("Renaming file " + file + " to " + target);  file.renameTo(target);  }  }  // Rename fileName to datedFilename.1  target = new File(datedFilename + "." + 1);  this.closeFile(); // keep windows happy.
  file = new File(fileName);  LogLog.debug("Renaming file " + file + " to " + target);  file.renameTo(target);  }else if (maxBackupIndex < 0){//infinite number of files   //find the max backup index  for (int i = 1; i < Integer.MAX_VALUE; i++) {  target = new File(datedFilename + "." + i);  if (! target.exists()) {//Rename fileName to datedFilename.i  this.closeFile();  file = new File(fileName);  file.renameTo(target);  LogLog.debug("Renaming file " + file + " to " + target);  break;  }  }  }  try {  // This will also close the file. This is OK since multiple  // close operations are safe.  this.setFile(fileName, false, bufferedIO, bufferSize);  } catch (IOException e) {  LogLog.error("setFile(" + fileName + ", false) call failed.", e);  }  scheduledFilename = datedFilename;  }  public synchronized void setFile(String fileName, boolean append,  boolean bufferedIO, int bufferSize) throws IOException {  super.setFile(fileName, append, this.bufferedIO, this.bufferSize);  if (append) {  File f = new File(fileName);  ((CountingQuietWriter) qw).setCount(f.length());  }  }  protected void setQWForFiles(Writer writer) {  this.qw = new CountingQuietWriter(writer, errorHandler);  }  /** * Rollover the current file to a new file. */  void timeRollOver() throws IOException {  /* Compute filename, but only if datePattern is specified */  if (datePattern == null) {  errorHandler.error("Missing DatePattern option in rollOver().");  return;  }  String datedFilename = fileName + sdf.format(now);  // It is too early to roll over because we are still within the  // bounds of the current interval. Rollover will occur once the  // next interval is reached.  if (scheduledFilename.equals(datedFilename)) {  return;  }  // close current file, and rename it to datedFilename  this.closeFile();  File target = new File(scheduledFilename);  if (target.exists()) {  target.delete();  }  File file = new File(fileName);  boolean result = file.renameTo(target);  if (result) {  LogLog.debug(fileName + " -> " + scheduledFilename);  } else {  LogLog.error("Failed to rename [" + fileName + "] to ["  + scheduledFilename + "].");  }  try {  // This will also close the file. This is OK since multiple  // close operations are safe.  super.setFile(fileName, false, this.bufferedIO, this.bufferSize);  } catch (IOException e) {  errorHandler.error("setFile(" + fileName + ", false) call failed.");  }  scheduledFilename = datedFilename;  }  /** * This method differentiates MyDailyRollingFileAppender from its super class. *  * <p> * Before actually logging, this method will check whether it is time to do * a rollover. If it is, it will schedule the next rollover time and then * rollover. * */  protected void subAppend(LoggingEvent event) {  long n = System.currentTimeMillis();  if (n >= nextCheck) {  now.setTime(n);  nextCheck = rc.getNextCheckMillis(now);  try {  timeRollOver();  } catch (IOException ioe) {  LogLog.error("rollOver() failed.", ioe);  }  } else if ((fileName != null)  && ((CountingQuietWriter) qw).getCount() >= maxFileSize) {  sizeRollOver();  }  super.subAppend(event);  }
}  /** * RollingCalendar is a helper class to MyDailyRollingFileAppender. Given a * periodicity type and the current time, it computes the start of the next * interval. * */
class RollingCalendar extends GregorianCalendar {  int type = MyDailyRollingFileAppender.TOP_OF_TROUBLE;  RollingCalendar() {  super();  }  RollingCalendar(TimeZone tz, Locale locale) {  super(tz, locale);  }  void setType(int type) {  this.type = type;  }  public long getNextCheckMillis(Date now) {  return getNextCheckDate(now).getTime();  }  public Date getNextCheckDate(Date now) {  this.setTime(now);  switch (type) {  case MyDailyRollingFileAppender.TOP_OF_MINUTE:  this.set(Calendar.SECOND, 0);  this.set(Calendar.MILLISECOND, 0);  this.add(Calendar.MINUTE, 1);  break;  case MyDailyRollingFileAppender.TOP_OF_HOUR:  this.set(Calendar.MINUTE, 0);  this.set(Calendar.SECOND, 0);  this.set(Calendar.MILLISECOND, 0);  this.add(Calendar.HOUR_OF_DAY, 1);  break;  case MyDailyRollingFileAppender.HALF_DAY:  this.set(Calendar.MINUTE, 0);  this.set(Calendar.SECOND, 0);  this.set(Calendar.MILLISECOND, 0);  int hour = get(Calendar.HOUR_OF_DAY);  if (hour < 12) {  this.set(Calendar.HOUR_OF_DAY, 12);  } else {  this.set(Calendar.HOUR_OF_DAY, 0);  this.add(Calendar.DAY_OF_MONTH, 1);  }  break;  case MyDailyRollingFileAppender.TOP_OF_DAY:  this.set(Calendar.HOUR_OF_DAY, 0);  this.set(Calendar.MINUTE, 0);  this.set(Calendar.SECOND, 0);  this.set(Calendar.MILLISECOND, 0);  this.add(Calendar.DATE, 1);  break;  case MyDailyRollingFileAppender.TOP_OF_WEEK:  this.set(Calendar.DAY_OF_WEEK, getFirstDayOfWeek());  this.set(Calendar.HOUR_OF_DAY, 0);  this.set(Calendar.SECOND, 0);  this.set(Calendar.MILLISECOND, 0);  this.add(Calendar.WEEK_OF_YEAR, 1);  break;  case MyDailyRollingFileAppender.TOP_OF_MONTH:  this.set(Calendar.DATE, 1);  this.set(Calendar.HOUR_OF_DAY, 0);  this.set(Calendar.SECOND, 0);  this.set(Calendar.MILLISECOND, 0);  this.add(Calendar.MONTH, 1);  break;  default:  throw new IllegalStateException("Unknown periodicity type.");  }  return getTime();  }
}  

# Set root logger level to DEBUG and its only appender to CONSOLE.
log4j.rootLogger=INFO,log,CONSOLE#CONSOLE
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=%d{HH:mm:ss,SSS} [%t] %-5p %C{1} : %m%n#route trace log
log4j.appender.log=org.apache.log4j.RollingFileAppender
log4j.appender.log.File=/route/route-trace-${log.name}.log
log4j.appender.log.MaxFileSize=200000KB
log4j.appender.log.MaxBackupIndex=100
log4j.appender.log.layout=org.apache.log4j.PatternLayout
log4j.appender.log.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS}[%t][%c][%p]-%m%n#SQL
log4j.logger.java.sql.Connection=INFO
log4j.logger.java.sql.Statement=INFO
log4j.logger.java.sql.PreparedStatement=INFO
log4j.logger.java.sql.ResultSet=INFO#monitor
log4j.logger.monitorlog=INFO,monitorFile
log4j.additivity.monitorlog = false
log4j.appender.monitorFile=com.xxx.xxx.util.MyDailyRollingFileAppender
log4j.appender.monitorFile.File=/route/lala.log
log4j.appender.monitorFile.MaxFileSize=2KB
log4j.appender.monitorFile.maxBackupIndex=2
log4j.appender.monitorFile.layout=org.apache.log4j.PatternLayout
log4j.appender.monitorFile.layout.ConversionPattern=%m%n