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<h1 title="Package" class="title">Package org.apache.log4j.helpers</h1>
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<th class="colFirst" scope="col">Class</th>
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<td class="colFirst"><a href="../../../../org/apache/log4j/helpers/AbsoluteTimeDateFormat.html" title="class in org.apache.log4j.helpers">AbsoluteTimeDateFormat</a></td>
<td class="colLast">
<div class="block">Formats a <code>Date</code> in the format "HH:mm:ss,SSS" for example,
"15:49:37,459".</div>
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<td class="colFirst"><a href="../../../../org/apache/log4j/helpers/AppenderAttachableImpl.html" title="class in org.apache.log4j.helpers">AppenderAttachableImpl</a></td>
<td class="colLast">
<div class="block">A straightforward implementation of the <a href="../../../../org/apache/log4j/spi/AppenderAttachable.html" title="interface in org.apache.log4j.spi"><code>AppenderAttachable</code></a>
interface.</div>
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<td class="colFirst"><a href="../../../../org/apache/log4j/helpers/BoundedFIFO.html" title="class in org.apache.log4j.helpers">BoundedFIFO</a></td>
<td class="colLast">
<div class="block"><code>BoundedFIFO</code> serves as the bounded first-in-first-out
buffer heavily used by the <a href="../../../../org/apache/log4j/AsyncAppender.html" title="class in org.apache.log4j"><code>AsyncAppender</code></a>.</div>
</td>
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<td class="colFirst"><a href="../../../../org/apache/log4j/helpers/CountingQuietWriter.html" title="class in org.apache.log4j.helpers">CountingQuietWriter</a></td>
<td class="colLast">
<div class="block">Counts the number of bytes written.</div>
</td>
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<td class="colFirst"><a href="../../../../org/apache/log4j/helpers/CyclicBuffer.html" title="class in org.apache.log4j.helpers">CyclicBuffer</a></td>
<td class="colLast">
<div class="block">CyclicBuffer is used by other appenders to hold <a href="../../../../org/apache/log4j/spi/LoggingEvent.html" title="class in org.apache.log4j.spi"><code>LoggingEvents</code></a> for immediate or differed display.</div>
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<td class="colFirst"><a href="../../../../org/apache/log4j/helpers/DateLayout.html" title="class in org.apache.log4j.helpers">DateLayout</a></td>
<td class="colLast">
<div class="block">This abstract layout takes care of all the date related options and
formatting work.</div>
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<td class="colFirst"><a href="../../../../org/apache/log4j/helpers/DateTimeDateFormat.html" title="class in org.apache.log4j.helpers">DateTimeDateFormat</a></td>
<td class="colLast">
<div class="block">Formats a <code>Date</code> in the format "dd MMM yyyy HH:mm:ss,SSS" for example,
"06 Nov 1994 15:49:37,459".</div>
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<td class="colFirst"><a href="../../../../org/apache/log4j/helpers/FileWatchdog.html" title="class in org.apache.log4j.helpers">FileWatchdog</a></td>
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<div class="block">Check every now and then that a certain file has not changed.</div>
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<td class="colFirst"><a href="../../../../org/apache/log4j/helpers/FormattingInfo.html" title="class in org.apache.log4j.helpers">FormattingInfo</a></td>
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<div class="block">FormattingInfo instances contain the information obtained when parsing
formatting modifiers in conversion modifiers.</div>
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<td class="colFirst"><a href="../../../../org/apache/log4j/helpers/ISO8601DateFormat.html" title="class in org.apache.log4j.helpers">ISO8601DateFormat</a></td>
<td class="colLast">
<div class="block">Formats a <code>Date</code> in the format "yyyy-MM-dd HH:mm:ss,SSS" for example
"1999-11-27 15:49:37,459".</div>
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<td class="colFirst"><a href="../../../../org/apache/log4j/helpers/Loader.html" title="class in org.apache.log4j.helpers">Loader</a></td>
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<div class="block">Load resources (or images) from various sources.</div>
</td>
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<td class="colFirst"><a href="../../../../org/apache/log4j/helpers/LogLog.html" title="class in org.apache.log4j.helpers">LogLog</a></td>
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<div class="block">This class used to output log statements from within the log4j package.</div>
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<td class="colFirst"><a href="../../../../org/apache/log4j/helpers/MDCKeySetExtractor.html" title="class in org.apache.log4j.helpers">MDCKeySetExtractor</a></td>
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<td class="colFirst"><a href="../../../../org/apache/log4j/helpers/NullEnumeration.html" title="class in org.apache.log4j.helpers">NullEnumeration</a></td>
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<div class="block">An always-empty Enumerator.</div>
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<td class="colFirst"><a href="../../../../org/apache/log4j/helpers/OnlyOnceErrorHandler.html" title="class in org.apache.log4j.helpers">OnlyOnceErrorHandler</a></td>
<td class="colLast">
<div class="block">The <code>OnlyOnceErrorHandler</code> implements log4j's default
error handling policy which consists of emitting a message for the
first error in an appender and ignoring all following errors.</div>
</td>
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<td class="colFirst"><a href="../../../../org/apache/log4j/helpers/OptionConverter.html" title="class in org.apache.log4j.helpers">OptionConverter</a></td>
<td class="colLast">
<div class="block">A convenience class to convert property values to specific types.</div>
</td>
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<td class="colFirst"><a href="../../../../org/apache/log4j/helpers/PatternConverter.html" title="class in org.apache.log4j.helpers">PatternConverter</a></td>
<td class="colLast">
<div class="block">PatternConverter is an abtract class that provides the
formatting functionality that derived classes need.</div>
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<td class="colFirst"><a href="../../../../org/apache/log4j/helpers/PatternParser.html" title="class in org.apache.log4j.helpers">PatternParser</a></td>
<td class="colLast">
<div class="block">Most of the work of the <a href="../../../../org/apache/log4j/PatternLayout.html" title="class in org.apache.log4j"><code>PatternLayout</code></a> class
is delegated to the PatternParser class.</div>
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<td class="colFirst"><a href="../../../../org/apache/log4j/helpers/QuietWriter.html" title="class in org.apache.log4j.helpers">QuietWriter</a></td>
<td class="colLast">
<div class="block">QuietWriter does not throw exceptions when things go
wrong.</div>
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<td class="colFirst"><a href="../../../../org/apache/log4j/helpers/RelativeTimeDateFormat.html" title="class in org.apache.log4j.helpers">RelativeTimeDateFormat</a></td>
<td class="colLast">
<div class="block">Formats a <code>Date</code> by printing the number of milliseconds
elapsed since construction of the format.</div>
</td>
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<td class="colFirst"><a href="../../../../org/apache/log4j/helpers/SyslogQuietWriter.html" title="class in org.apache.log4j.helpers">SyslogQuietWriter</a></td>
<td class="colLast">
<div class="block">SyslogQuietWriter extends QuietWriter by prepending the syslog
level code before each printed String.</div>
</td>
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<td class="colFirst"><a href="../../../../org/apache/log4j/helpers/SyslogWriter.html" title="class in org.apache.log4j.helpers">SyslogWriter</a></td>
<td class="colLast">
<div class="block">SyslogWriter is a wrapper around the java.net.DatagramSocket class
so that it behaves like a java.io.Writer.</div>
</td>
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<td class="colFirst"><a href="../../../../org/apache/log4j/helpers/ThreadLocalMap.html" title="class in org.apache.log4j.helpers">ThreadLocalMap</a></td>
<td class="colLast">
<div class="block"><code>ThreadLocalMap</code> extends <code>InheritableThreadLocal</code>
to bequeath a copy of the hashtable of the MDC of the parent
thread.</div>
</td>
</tr>
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<td class="colFirst"><a href="../../../../org/apache/log4j/helpers/Transform.html" title="class in org.apache.log4j.helpers">Transform</a></td>
<td class="colLast">
<div class="block">Utility class for transforming strings.</div>
</td>
</tr>
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<td class="colFirst"><a href="../../../../org/apache/log4j/helpers/UtilLoggingLevel.html" title="class in org.apache.log4j.helpers">UtilLoggingLevel</a></td>
<td class="colLast">
<div class="block">An extension of the Level class that provides support for java.util.logging
Levels.</div>
</td>
</tr>
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