org.jboss.logmanager.handlers.PeriodicRotatingFileHandler Maven / Gradle / Ivy
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* JBoss, Home of Professional Open Source.
*
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jboss.logmanager.handlers;
import org.jboss.logmanager.ExtLogRecord;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Calendar;
import java.util.TimeZone;
import java.io.File;
import java.io.FileNotFoundException;
import java.util.logging.ErrorManager;
/**
* A file handler which rotates the log at a preset time interval. The interval is determined by the content of the
* suffix string which is passed in to {@link #setSuffix(String)}.
*/
public class PeriodicRotatingFileHandler extends FileHandler {
private SimpleDateFormat format;
private String nextSuffix;
private Period period = Period.NEVER;
private long nextRollover = Long.MAX_VALUE;
private TimeZone timeZone = TimeZone.getDefault();
/**
* Construct a new instance with no formatter and no output file.
*/
public PeriodicRotatingFileHandler() {
}
/**
* Construct a new instance with the given output file.
*
* @param fileName the file name
*
* @throws java.io.FileNotFoundException if the file could not be found on open
*/
public PeriodicRotatingFileHandler(final String fileName) throws FileNotFoundException {
super(fileName);
}
/**
* Construct a new instance with the given output file and append setting.
*
* @param fileName the file name
* @param append {@code true} to append, {@code false} to overwrite
*
* @throws java.io.FileNotFoundException if the file could not be found on open
*/
public PeriodicRotatingFileHandler(final String fileName, final boolean append) throws FileNotFoundException {
super(fileName, append);
}
/**
* Construct a new instance with the given output file.
*
* @param file the file
* @param suffix the format suffix to use
*
* @throws java.io.FileNotFoundException if the file could not be found on open
*/
public PeriodicRotatingFileHandler(final File file, final String suffix) throws FileNotFoundException {
super(file);
setSuffix(suffix);
}
/**
* Construct a new instance with the given output file and append setting.
*
* @param file the file
* @param suffix the format suffix to use
* @param append {@code true} to append, {@code false} to overwrite
* @throws java.io.FileNotFoundException if the file could not be found on open
*/
public PeriodicRotatingFileHandler(final File file, final String suffix, final boolean append) throws FileNotFoundException {
super(file, append);
setSuffix(suffix);
}
@Override
public void setFile(final File file) throws FileNotFoundException {
synchronized (outputLock) {
super.setFile(file);
if (format != null && file != null && file.lastModified() > 0) {
calcNextRollover(file.lastModified());
}
}
}
/** {@inheritDoc} This implementation checks to see if the scheduled rollover time has yet occurred. */
protected void preWrite(final ExtLogRecord record) {
final long recordMillis = record.getMillis();
if (recordMillis >= nextRollover) {
rollOver();
calcNextRollover(recordMillis);
}
}
/**
* Set the suffix string. The string is in a format which can be understood by {@link java.text.SimpleDateFormat}.
* The period of the rotation is automatically calculated based on the suffix.
*
* @param suffix the suffix
* @throws IllegalArgumentException if the suffix is not valid
*/
public void setSuffix(String suffix) throws IllegalArgumentException {
final SimpleDateFormat format = new SimpleDateFormat(suffix);
format.setTimeZone(timeZone);
final int len = suffix.length();
Period period = Period.NEVER;
for (int i = 0; i < len; i ++) {
switch (suffix.charAt(i)) {
case 'y': period = min(period, Period.YEAR); break;
case 'M': period = min(period, Period.MONTH); break;
case 'w':
case 'W': period = min(period, Period.WEEK); break;
case 'D':
case 'd':
case 'F':
case 'E': period = min(period, Period.DAY); break;
case 'a': period = min(period, Period.HALF_DAY); break;
case 'H':
case 'k':
case 'K':
case 'h': period = min(period, Period.HOUR); break;
case 'm': period = min(period, Period.MINUTE); break;
case '\'': while (suffix.charAt(++i) != '\''); break;
case 's':
case 'S': throw new IllegalArgumentException("Rotating by second or millisecond is not supported");
}
}
synchronized (outputLock) {
this.format = format;
this.period = period;
final long now;
final File file = getFile();
if (file != null && file.lastModified() > 0) {
now = file.lastModified();
} else {
now = System.currentTimeMillis();
}
calcNextRollover(now);
}
}
/**
* Returns the suffix to be used.
*
* @return the suffix to be used
*/
protected final String getNextSuffix() {
return nextSuffix;
}
private void rollOver() {
try {
final File file = getFile();
// first, close the original file (some OSes won't let you move/rename a file that is open)
setFile(null);
// next, rotate it
file.renameTo(new File(file.getAbsolutePath() + nextSuffix));
// start new file
setFile(file);
} catch (FileNotFoundException e) {
reportError("Unable to rotate log file", e, ErrorManager.OPEN_FAILURE);
}
}
private void calcNextRollover(final long fromTime) {
if (period == Period.NEVER) {
nextRollover = Long.MAX_VALUE;
return;
}
nextSuffix = format.format(new Date(fromTime));
final Calendar calendar = Calendar.getInstance(timeZone);
calendar.setTimeInMillis(fromTime);
final Period period = this.period;
// clear out less-significant fields
switch (period) {
default:
case YEAR:
calendar.set(Calendar.MONTH, 0);
case MONTH:
calendar.set(Calendar.DAY_OF_MONTH, 0);
calendar.clear(Calendar.WEEK_OF_MONTH);
case WEEK:
if (period == Period.WEEK) {
calendar.set(Calendar.DAY_OF_WEEK, calendar.getFirstDayOfWeek());
} else {
calendar.clear(Calendar.DAY_OF_WEEK);
}
calendar.clear(Calendar.DAY_OF_WEEK_IN_MONTH);
case DAY:
calendar.set(Calendar.HOUR_OF_DAY, 0);
case HALF_DAY:
if (period == Period.HALF_DAY) {
calendar.set(Calendar.HOUR, 0);
} else {
//We want both HOUR_OF_DAY and (HOUR + AM_PM) to be zeroed out
//This should ensure the hour is truly zeroed out
calendar.set(Calendar.HOUR, 0);
calendar.set(Calendar.AM_PM, 0);
}
case HOUR:
calendar.set(Calendar.MINUTE, 0);
case MINUTE:
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MILLISECOND, 0);
}
// increment the relevant field
switch (period) {
case YEAR:
calendar.add(Calendar.YEAR, 1);
break;
case MONTH:
calendar.add(Calendar.MONTH, 1);
break;
case WEEK:
calendar.add(Calendar.WEEK_OF_YEAR, 1);
break;
case DAY:
calendar.add(Calendar.DAY_OF_MONTH, 1);
break;
case HALF_DAY:
calendar.add(Calendar.AM_PM, 1);
break;
case HOUR:
calendar.add(Calendar.HOUR_OF_DAY, 1);
break;
case MINUTE:
calendar.add(Calendar.MINUTE, 1);
break;
}
nextRollover = calendar.getTimeInMillis();
}
/**
* Get the configured time zone for this handler.
*
* @return the configured time zone
*/
public TimeZone getTimeZone() {
return timeZone;
}
/**
* Set the configured time zone for this handler.
*
* @param timeZone the configured time zone
*/
public void setTimeZone(final TimeZone timeZone) {
if (timeZone == null) {
throw new NullPointerException("timeZone is null");
}
this.timeZone = timeZone;
}
private static > T min(T a, T b) {
return a.compareTo(b) <= 0 ? a : b;
}
/**
* Possible period values. Keep in strictly ascending order of magnitude.
*/
public enum Period {
MINUTE,
HOUR,
HALF_DAY,
DAY,
WEEK,
MONTH,
YEAR,
NEVER,
}
}
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