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| package org.apache.log4j;
import org.apache.log4j.helpers.CountingQuietWriter;
import org.apache.log4j.helpers.LogLog;
import org.apache.log4j.helpers.OptionConverter;
import org.apache.log4j.spi.LoggingEvent;
import java.io.File;
import java.io.IOException;
import java.io.Writer;
import java.text.SimpleDateFormat;
import java.util.*;
public class DailyAndSizeRollingFileAppender extends FileAppender {
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;
protected long maxFileSize = 10 * 1024 * 1024;
protected int maxBackupIndex = 1;
private String datePattern = "'.'yyyy-MM-dd";
private String scheduledFilename;
private long nextCheck = System.currentTimeMillis() - 1;
Date now = new Date();
SimpleDateFormat sdf;
RollingCalendar rc = new RollingCalendar();
int checkPeriod = TOP_OF_TROUBLE;
static final TimeZone GMT_TIME_ZONE = TimeZone.getTimeZone("GMT");
public DailyAndSizeRollingFileAppender() {
}
public DailyAndSizeRollingFileAppender(Layout layout, String filename, String datePattern) throws IOException {
super(layout, filename, true);
this.datePattern = datePattern;
activateOptions();
}
public long getMaximumFileSize() {
return maxFileSize;
}
public void setMaximumFileSize(long maxFileSize) {
this.maxFileSize = maxFileSize;
}
public void setMaxFileSize(String value) {
this.maxFileSize = OptionConverter.toFileSize(value, maxFileSize + 1);
}
public int getMaxBackupIndex() {
return maxBackupIndex;
}
public void setMaxBackupIndex(int maxBackupIndex) {
this.maxBackupIndex = maxBackupIndex;
}
public String getDatePattern() {
return datePattern;
}
public void setDatePattern(String datePattern) {
this.datePattern = datePattern;
}
@Override
public void activateOptions() {
super.activateOptions();
if (null != datePattern && 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 + "].");
}
}
int computeCheckPeriod() {
RollingCalendar rollingCalendar = new RollingCalendar(GMT_TIME_ZONE, Locale.getDefault());
Date epoch = new Date(0);
if (null != datePattern) {
for (int i = TOP_OF_MINUTE; i <= TOP_OF_MONTH; i++) {
SimpleDateFormat simpleDateFormat = new SimpleDateFormat(datePattern);
simpleDateFormat.setTimeZone(GMT_TIME_ZONE);
String r0 = simpleDateFormat.format(epoch);
rollingCalendar.setType(i);
Date next = new Date(rollingCalendar.getNextCheckMillis(epoch));
String r1 = simpleDateFormat.format(next);
if (null != r0 && null != r1 && !r0.equals(r1)) {
return i;
}
}
}
return TOP_OF_TROUBLE;
}
public 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) {
file = new File(datedFilename + "." + maxBackupIndex);
if (file.exists()) {
file.delete();
}
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);
}
}
target = new File(datedFilename + "." + 1);
this.closeFile();
file = new File(fileName);
LogLog.debug("Renaming file " + file + " to " + target);
file.renameTo(target);
} else if (maxBackupIndex < 0) {
for (int i = 0; i < Integer.MAX_VALUE; i++) {
target = new File(datedFilename + "." + i);
if (!target.exists()) {
this.closeFile();
file = new File(fileName);
file.renameTo(target);
LogLog.debug("Renaming file " + file + " to " + target);
break;
}
}
}
try {
this.setFile(fileName, false, bufferedIO, bufferSize);
} catch (IOException e) {
LogLog.error("setFile(" + fileName + ", false) call failed.", e);
}
scheduledFilename = datedFilename;
}
@Override
public synchronized void setFile(
String fileName,
boolean append,
boolean bufferedIO,
int bufferSize) throws IOException {
super.setFile(fileName, append, bufferedIO, bufferSize);
if (append) {
File f = new File(fileName);
((CountingQuietWriter) qw).setCount(f.length());
}
}
@Override
protected void setQWForFiles(Writer writer) {
this.qw = new CountingQuietWriter(writer, errorHandler);
}
@Override
protected void subAppend(LoggingEvent event) {
long n = System.currentTimeMillis();
if (n >= nextCheck) {
now.setTime(n);
nextCheck = rc.getNextCheckMillis(now);
timeRollOver();
} else if (null != fileName && ((CountingQuietWriter) qw).getCount() >= maxFileSize) {
sizeRollOver();
}
super.subAppend(event);
}
void timeRollOver() {
if (null == datePattern) {
errorHandler.error("Missing DatePattern option in rollOver().");
return;
}
String datedFilename = fileName + sdf.format(now);
if (scheduledFilename.equals(datedFilename)) {
return;
}
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 {
super.setFile(fileName, false, bufferedIO, bufferSize);
} catch (IOException e) {
errorHandler.error("setFile(" + fileName + ", false) call failed.");
}
scheduledFilename = datedFilename;
}
}
class RollingCalendar extends GregorianCalendar {
private static final long serialVersionUID = -3560331770601814177L;
int type = DailyAndSizeRollingFileAppender.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 DailyAndSizeRollingFileAppender.TOP_OF_MINUTE:
this.set(Calendar.SECOND, 0);
this.set(Calendar.MILLISECOND, 0);
this.add(Calendar.MINUTE, 1);
break;
case DailyAndSizeRollingFileAppender.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 DailyAndSizeRollingFileAppender.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 DailyAndSizeRollingFileAppender.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 DailyAndSizeRollingFileAppender.TOP_OF_WEEK:
this.set(Calendar.DAY_OF_WEEK, getFirstDayOfWeek());
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.WEEK_OF_YEAR, 1);
break;
case DailyAndSizeRollingFileAppender.TOP_OF_MONTH:
this.set(Calendar.DATE, 1);
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.MONTH, 1);
break;
default:
throw new IllegalStateException("Unknown periodicity type.");
}
return getTime();
}
}
|