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.access.pattern;
015
016import java.util.List;
017import java.util.TimeZone;
018
019import ch.qos.logback.access.spi.IAccessEvent;
020import ch.qos.logback.core.CoreConstants;
021import ch.qos.logback.core.util.CachingDateFormatter;
022
023public class DateConverter extends AccessConverter {
024
025    CachingDateFormatter cachingDateFormatter = null;
026
027    @Override
028    public void start() {
029
030        String datePattern = getFirstOption();
031        if (datePattern == null) {
032            datePattern = CoreConstants.CLF_DATE_PATTERN;
033        }
034
035        if (datePattern.equals(CoreConstants.ISO8601_STR)) {
036            datePattern = CoreConstants.ISO8601_PATTERN;
037        }
038
039        try {
040            cachingDateFormatter = new CachingDateFormatter(datePattern);
041            // maximumCacheValidity = CachedDateFormat.getMaximumCacheValidity(pattern);
042        } catch (IllegalArgumentException e) {
043            addWarn("Could not instantiate SimpleDateFormat with pattern " + datePattern, e);
044            addWarn("Defaulting to  " + CoreConstants.CLF_DATE_PATTERN);
045            cachingDateFormatter = new CachingDateFormatter(CoreConstants.CLF_DATE_PATTERN);
046        }
047
048        List<String> optionList = getOptionList();
049
050        // if the option list contains a TZ option, then set it.
051        if (optionList != null && optionList.size() > 1) {
052            TimeZone tz = TimeZone.getTimeZone((String) optionList.get(1));
053            cachingDateFormatter.setTimeZone(tz);
054        }
055    }
056
057    @Override
058    public String convert(IAccessEvent accessEvent) {
059        long timestamp = accessEvent.getTimeStamp();
060        return cachingDateFormatter.format(timestamp);
061    }
062}