ch.qos.logback.classic.pattern.DateConverter Maven / Gradle / Ivy
/**
* Logback: the reliable, generic, fast and flexible logging framework.
* Copyright (C) 1999-2009, QOS.ch. All rights reserved.
*
* This program and the accompanying materials are dual-licensed under
* either the terms of the Eclipse Public License v1.0 as published by
* the Eclipse Foundation
*
* or (per the licensee's choosing)
*
* under the terms of the GNU Lesser General Public License version 2.1
* as published by the Free Software Foundation.
*/
package ch.qos.logback.classic.pattern;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;
import java.util.TimeZone;
import ch.qos.logback.classic.spi.ILoggingEvent;
import ch.qos.logback.core.CoreConstants;
public class DateConverter extends ClassicConverter {
long lastTimestamp = -1;
String timestampStrCache = null;
SimpleDateFormat simpleFormat = null;
public void start() {
String datePattern = getFirstOption();
if (datePattern == null) {
datePattern = CoreConstants.ISO8601_PATTERN;
}
if (datePattern.equals(CoreConstants.ISO8601_STR)) {
datePattern = CoreConstants.ISO8601_PATTERN;
}
try {
simpleFormat = new SimpleDateFormat(datePattern);
// maximumCacheValidity =
// CachedDateFormat.getMaximumCacheValidity(pattern);
} catch (IllegalArgumentException e) {
addWarn("Could not instantiate SimpleDateFormat with pattern "
+ datePattern, e);
// default to the ISO8601 format
simpleFormat = new SimpleDateFormat(CoreConstants.ISO8601_PATTERN);
}
List optionList = getOptionList();
// if the option list contains a TZ option, then set it.
if (optionList != null && optionList.size() > 1) {
TimeZone tz = TimeZone.getTimeZone((String) optionList.get(1));
simpleFormat.setTimeZone(tz);
}
}
public String convert(ILoggingEvent le) {
long timestamp = le.getTimeStamp();
synchronized (this) {
// if called multiple times within the same millisecond
// return cache value
if (timestamp == lastTimestamp) {
return timestampStrCache;
} else {
lastTimestamp = timestamp;
// SimpleDateFormat is not thread safe.
// See also http://jira.qos.ch/browse/LBCLASSIC-36
timestampStrCache = simpleFormat.format(new Date(timestamp));
return timestampStrCache;
}
}
}
}