org.apache.catalina.valves
Class AccessLogValve.DateFormatCache

java.lang.Object
  org.apache.catalina.valves.AccessLogValve.DateFormatCache

Enclosing class:

AccessLogValve

protected static class AccessLogValve.DateFormatCache
extends Object

Cache structure for formatted timestamps based on seconds.

The cache consists of entries for a consecutive range of seconds. The length of the range is configurable. It is implemented based on a cyclic buffer. New entries shift the range.

There is one cache for the CLF format (the access log standard format) and a HashMap of caches for additional formats used by SimpleDateFormat.

Although the cache supports specifying a locale when retrieving a formatted timestamp, each format will always use the locale given when the format was first used. New locales can only be used for new formats. The CLF format will always be formatted using the locale en_US.

The cache is not threadsafe. It can be used without synchronization via thread local instances, or with synchronization as a global cache.

The cache can be created with a parent cache to build a cache hierarchy. Access to the parent cache is threadsafe.

This class uses a small thread local first level cache and a bigger synchronized global second level cache.

Nested Class Summary

protected class

AccessLogValve.DateFormatCache.Cache

Field Summary

protected AccessLogValve.DateFormatCache.Cache

cLFCache

Constructor Summary

protected

AccessLogValve.DateFormatCache(int size, Locale loc, AccessLogValve.DateFormatCache parent)

Method Summary

String	getFormat(long time)
String	getFormat(String format, Locale loc, long time)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

cLFCache

protected final AccessLogValve.DateFormatCache.Cache cLFCache

Constructor Detail

AccessLogValve.DateFormatCache

protected AccessLogValve.DateFormatCache(int size,
                                         Locale loc,
                                         AccessLogValve.DateFormatCache parent)

Method Detail

getFormat

public String getFormat(long time)

getFormat

public String getFormat(String format,
                        Locale loc,
                        long time)