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;
018
019import ch.qos.logback.classic.spi.ILoggingEvent;
020import ch.qos.logback.core.CoreConstants;
021import ch.qos.logback.core.util.CachingDateFormatter;
022
023public class DateConverter extends ClassicConverter {
024
025    long lastTimestamp = -1;
026    String timestampStrCache = null;
027    CachingDateFormatter cachingDateFormatter = null;
028
029    public void start() {
030
031        String datePattern = getFirstOption();
032        if (datePattern == null) {
033            datePattern = CoreConstants.ISO8601_PATTERN;
034        }
035
036        if (datePattern.equals(CoreConstants.ISO8601_STR)) {
037            datePattern = CoreConstants.ISO8601_PATTERN;
038        }
039
040        List<String> optionList = getOptionList();
041        ZoneId zoneId = null;
042        // if the option list contains a TZ option, then set it.
043        if (optionList != null && optionList.size() > 1) {
044            String zoneIdString = (String) optionList.get(1);
045            zoneId = ZoneId.of(zoneIdString);
046        }
047
048        try {
049            cachingDateFormatter = new CachingDateFormatter(datePattern, zoneId);
050        } catch (IllegalArgumentException e) {
051            addWarn("Could not instantiate SimpleDateFormat with pattern " + datePattern, e);
052            // default to the ISO8601 format
053            cachingDateFormatter = new CachingDateFormatter(CoreConstants.ISO8601_PATTERN, zoneId);
054        }
055
056        super.start();
057    }
058
059    public String convert(ILoggingEvent le) {
060        long timestamp = le.getTimeStamp();
061        return cachingDateFormatter.format(timestamp);
062    }
063}