001/**
002 * Logback: the reliable, generic, fast and flexible logging framework.
003 * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
004 *
005 * This program and the accompanying materials are dual-licensed under
006 * either the terms of the Eclipse Public License v1.0 as published by
007 * the Eclipse Foundation
008 *
009 *   or (per the licensee's choosing)
010 *
011 * under the terms of the GNU Lesser General Public License version 2.1
012 * as published by the Free Software Foundation.
013 */
014package ch.qos.logback.classic.pattern;
015
016import java.time.ZoneId;
017import java.util.List;
018import java.util.Locale;
019
020import ch.qos.logback.classic.spi.ILoggingEvent;
021import ch.qos.logback.core.CoreConstants;
022import ch.qos.logback.core.util.CachingDateFormatter;
023
024public class DateConverter extends ClassicConverter {
025
026    long lastTimestamp = -1;
027    String timestampStrCache = null;
028    CachingDateFormatter cachingDateFormatter = null;
029
030    public void start() {
031
032        String datePattern = getFirstOption();
033
034        if (datePattern == null) {
035            datePattern = CoreConstants.ISO8601_PATTERN;
036        }
037
038        if (datePattern.equals(CoreConstants.ISO8601_STR)) {
039            datePattern = CoreConstants.ISO8601_PATTERN;
040        }
041
042        if (datePattern.equals(CoreConstants.STRICT_STR)) {
043            datePattern = CoreConstants.STRICT_ISO8601_PATTERN;
044        }
045
046        List<String> optionList = getOptionList();
047        ZoneId zoneId = null;
048        // if the option list contains a TZ option, then set it.
049        if (optionList != null && optionList.size() > 1) {
050            String zoneIdString = (String) optionList.get(1);
051            zoneId = ZoneId.of(zoneIdString);
052            addInfo("Setting zoneId to \""+zoneId+"\"");
053        }
054
055        Locale locale = null;
056        if (optionList != null && optionList.size() > 2) {
057            String localeIdStr = (String) optionList.get(2);
058            locale = Locale.forLanguageTag(localeIdStr);
059            addInfo("Setting locale to \""+locale+"\"");
060        }
061        try {
062            // if zoneId is null, the CachingDateFormatter will use the ZoneId.systemDefault()
063            cachingDateFormatter = new CachingDateFormatter(datePattern, zoneId, locale);
064        } catch (IllegalArgumentException e) {
065            addWarn("Could not instantiate SimpleDateFormat with pattern " + datePattern, e);
066            // default to the ISO8601 format
067            cachingDateFormatter = new CachingDateFormatter(CoreConstants.ISO8601_PATTERN, zoneId);
068        }
069
070        super.start();
071    }
072
073    public String convert(ILoggingEvent le) {
074        long timestamp = le.getTimeStamp();
075        return cachingDateFormatter.format(timestamp);
076    }
077}