View Javadoc
1   /**
2    * Logback: the reliable, generic, fast and flexible logging framework.
3    * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
4    *
5    * This program and the accompanying materials are dual-licensed under
6    * either the terms of the Eclipse Public License v1.0 as published by
7    * the Eclipse Foundation
8    *
9    *   or (per the licensee's choosing)
10   *
11   * under the terms of the GNU Lesser General Public License version 2.1
12   * as published by the Free Software Foundation.
13   */
14  package ch.qos.logback.classic.pattern;
15  
16  import java.time.ZoneId;
17  import java.util.List;
18  
19  import ch.qos.logback.classic.spi.ILoggingEvent;
20  import ch.qos.logback.core.CoreConstants;
21  import ch.qos.logback.core.util.CachingDateFormatter;
22  
23  public class DateConverter extends ClassicConverter {
24  
25      long lastTimestamp = -1;
26      String timestampStrCache = null;
27      CachingDateFormatter cachingDateFormatter = null;
28  
29      public void start() {
30  
31          String datePattern = getFirstOption();
32          if (datePattern == null) {
33              datePattern = CoreConstants.ISO8601_PATTERN;
34          }
35  
36          if (datePattern.equals(CoreConstants.ISO8601_STR)) {
37              datePattern = CoreConstants.ISO8601_PATTERN;
38          }
39  
40          List<String> optionList = getOptionList();
41          ZoneId zoneId = null;
42          // if the option list contains a TZ option, then set it.
43          if (optionList != null && optionList.size() > 1) {
44              String zoneIdString = (String) optionList.get(1);
45              zoneId = ZoneId.of(zoneIdString);
46          }
47  
48          try {
49              cachingDateFormatter = new CachingDateFormatter(datePattern, zoneId);
50          } catch (IllegalArgumentException e) {
51              addWarn("Could not instantiate SimpleDateFormat with pattern " + datePattern, e);
52              // default to the ISO8601 format
53              cachingDateFormatter = new CachingDateFormatter(CoreConstants.ISO8601_PATTERN, zoneId);
54          }
55  
56          super.start();
57      }
58  
59      public String convert(ILoggingEvent le) {
60          long timestamp = le.getTimeStamp();
61          return cachingDateFormatter.format(timestamp);
62      }
63  }