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<div class="subTitle">org.apache.log4j</div>
<h2 title="Class DailyRollingFileAppender" class="title">Class DailyRollingFileAppender</h2>
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<ul class="inheritance">
<li>java.lang.Object</li>
<li>
<ul class="inheritance">
<li><a href="../../../org/apache/log4j/AppenderSkeleton.html" title="class in org.apache.log4j">org.apache.log4j.AppenderSkeleton</a></li>
<li>
<ul class="inheritance">
<li><a href="../../../org/apache/log4j/WriterAppender.html" title="class in org.apache.log4j">org.apache.log4j.WriterAppender</a></li>
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<li><a href="../../../org/apache/log4j/FileAppender.html" title="class in org.apache.log4j">org.apache.log4j.FileAppender</a></li>
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<ul class="inheritance">
<li>org.apache.log4j.DailyRollingFileAppender</li>
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<dl>
<dt>All Implemented Interfaces:</dt>
<dd><a href="../../../org/apache/log4j/Appender.html" title="interface in org.apache.log4j">Appender</a>, <a href="../../../org/apache/log4j/spi/OptionHandler.html" title="interface in org.apache.log4j.spi">OptionHandler</a></dd>
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<pre>public class <span class="typeNameLabel">DailyRollingFileAppender</span>
extends <a href="../../../org/apache/log4j/FileAppender.html" title="class in org.apache.log4j">FileAppender</a></pre>
<div class="block">DailyRollingFileAppender extends <a href="../../../org/apache/log4j/FileAppender.html" title="class in org.apache.log4j"><code>FileAppender</code></a> so that the
underlying file is rolled over at a user chosen frequency.
DailyRollingFileAppender has been observed to exhibit
synchronization issues and data loss. The log4j extras
companion includes alternatives which should be considered
for new deployments and which are discussed in the documentation
for org.apache.log4j.rolling.RollingFileAppender.
<p>The rolling schedule is specified by the <b>DatePattern</b>
option. This pattern should follow the <code>SimpleDateFormat</code>
conventions. In particular, you <em>must</em> escape literal text
within a pair of single quotes. A formatted version of the date
pattern is used as the suffix for the rolled file name.
<p>For example, if the <b>File</b> option is set to
<code>/foo/bar.log</code> and the <b>DatePattern</b> set to
<code>'.'yyyy-MM-dd</code>, on 2001-02-16 at midnight, the logging
file <code>/foo/bar.log</code> will be copied to
<code>/foo/bar.log.2001-02-16</code> and logging for 2001-02-17
will continue in <code>/foo/bar.log</code> until it rolls over
the next day.
<p>Is is possible to specify monthly, weekly, half-daily, daily,
hourly, or minutely rollover schedules.
<p><table border="1" cellpadding="2">
<tr>
<th>DatePattern</th>
<th>Rollover schedule</th>
<th>Example</th>
<tr>
<td><code>'.'yyyy-MM</code>
<td>Rollover at the beginning of each month</td>
<td>At midnight of May 31st, 2002 <code>/foo/bar.log</code> will be
copied to <code>/foo/bar.log.2002-05</code>. Logging for the month
of June will be output to <code>/foo/bar.log</code> until it is
also rolled over the next month.
<tr>
<td><code>'.'yyyy-ww</code>
<td>Rollover at the first day of each week. The first day of the
week depends on the locale.</td>
<td>Assuming the first day of the week is Sunday, on Saturday
midnight, June 9th 2002, the file <i>/foo/bar.log</i> will be
copied to <i>/foo/bar.log.2002-23</i>. Logging for the 24th week
of 2002 will be output to <code>/foo/bar.log</code> until it is
rolled over the next week.
<tr>
<td><code>'.'yyyy-MM-dd</code>
<td>Rollover at midnight each day.</td>
<td>At midnight, on March 8th, 2002, <code>/foo/bar.log</code> will
be copied to <code>/foo/bar.log.2002-03-08</code>. Logging for the
9th day of March will be output to <code>/foo/bar.log</code> until
it is rolled over the next day.
<tr>
<td><code>'.'yyyy-MM-dd-a</code>
<td>Rollover at midnight and midday of each day.</td>
<td>At noon, on March 9th, 2002, <code>/foo/bar.log</code> will be
copied to <code>/foo/bar.log.2002-03-09-AM</code>. Logging for the
afternoon of the 9th will be output to <code>/foo/bar.log</code>
until it is rolled over at midnight.
<tr>
<td><code>'.'yyyy-MM-dd-HH</code>
<td>Rollover at the top of every hour.</td>
<td>At approximately 11:00.000 o'clock on March 9th, 2002,
<code>/foo/bar.log</code> will be copied to
<code>/foo/bar.log.2002-03-09-10</code>. Logging for the 11th hour
of the 9th of March will be output to <code>/foo/bar.log</code>
until it is rolled over at the beginning of the next hour.
<tr>
<td><code>'.'yyyy-MM-dd-HH-mm</code>
<td>Rollover at the beginning of every minute.</td>
<td>At approximately 11:23,000, on March 9th, 2001,
<code>/foo/bar.log</code> will be copied to
<code>/foo/bar.log.2001-03-09-10-22</code>. Logging for the minute
of 11:23 (9th of March) will be output to
<code>/foo/bar.log</code> until it is rolled over the next minute.
</table>
<p>Do not use the colon ":" character in anywhere in the
<b>DatePattern</b> option. The text before the colon is interpeted
as the protocol specificaion of a URL which is probably not what
you want.</div>
<dl>
<dt><span class="simpleTagLabel">Author:</span></dt>
<dd>Eirik Lygre, Ceki Gülcü</dd>
</dl>
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<h3>Fields inherited from class org.apache.log4j.<a href="../../../org/apache/log4j/FileAppender.html" title="class in org.apache.log4j">FileAppender</a></h3>
<code><a href="../../../org/apache/log4j/FileAppender.html#bufferedIO">bufferedIO</a>, <a href="../../../org/apache/log4j/FileAppender.html#bufferSize">bufferSize</a>, <a href="../../../org/apache/log4j/FileAppender.html#fileAppend">fileAppend</a>, <a href="../../../org/apache/log4j/FileAppender.html#fileName">fileName</a></code></li>
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<code><a href="../../../org/apache/log4j/WriterAppender.html#encoding">encoding</a>, <a href="../../../org/apache/log4j/WriterAppender.html#immediateFlush">immediateFlush</a>, <a href="../../../org/apache/log4j/WriterAppender.html#qw">qw</a></code></li>
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<h3>Fields inherited from class org.apache.log4j.<a href="../../../org/apache/log4j/AppenderSkeleton.html" title="class in org.apache.log4j">AppenderSkeleton</a></h3>
<code><a href="../../../org/apache/log4j/AppenderSkeleton.html#closed">closed</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#errorHandler">errorHandler</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#headFilter">headFilter</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#layout">layout</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#name">name</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#tailFilter">tailFilter</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#threshold">threshold</a></code></li>
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<caption><span>Constructors</span><span class="tabEnd"> </span></caption>
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<th class="colOne" scope="col">Constructor and Description</th>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../org/apache/log4j/DailyRollingFileAppender.html#DailyRollingFileAppender--">DailyRollingFileAppender</a></span>()</code>
<div class="block">The default constructor does nothing.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../org/apache/log4j/DailyRollingFileAppender.html#DailyRollingFileAppender-org.apache.log4j.Layout-java.lang.String-java.lang.String-">DailyRollingFileAppender</a></span>(<a href="../../../org/apache/log4j/Layout.html" title="class in org.apache.log4j">Layout</a> layout,
java.lang.String filename,
java.lang.String datePattern)</code>
<div class="block">Instantiate a <code>DailyRollingFileAppender</code> and open the
file designated by <code>filename</code>.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/log4j/DailyRollingFileAppender.html#activateOptions--">activateOptions</a></span>()</code>
<div class="block">If the value of <b>File</b> is not <code>null</code>, then <a href="../../../org/apache/log4j/FileAppender.html#setFile-java.lang.String-"><code>FileAppender.setFile(java.lang.String)</code></a> is called with the values of <b>File</b> and
<b>Append</b> properties.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/log4j/DailyRollingFileAppender.html#getDatePattern--">getDatePattern</a></span>()</code>
<div class="block">Returns the value of the <b>DatePattern</b> option.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/log4j/DailyRollingFileAppender.html#setDatePattern-java.lang.String-">setDatePattern</a></span>(java.lang.String pattern)</code>
<div class="block">The <b>DatePattern</b> takes a string in the same format as
expected by <code>SimpleDateFormat</code>.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/apache/log4j/DailyRollingFileAppender.html#subAppend-org.apache.log4j.spi.LoggingEvent-">subAppend</a></span>(<a href="../../../org/apache/log4j/spi/LoggingEvent.html" title="class in org.apache.log4j.spi">LoggingEvent</a> event)</code>
<div class="block">This method differentiates DailyRollingFileAppender from its
super class.</div>
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<h3>Methods inherited from class org.apache.log4j.<a href="../../../org/apache/log4j/FileAppender.html" title="class in org.apache.log4j">FileAppender</a></h3>
<code><a href="../../../org/apache/log4j/FileAppender.html#closeFile--">closeFile</a>, <a href="../../../org/apache/log4j/FileAppender.html#getAppend--">getAppend</a>, <a href="../../../org/apache/log4j/FileAppender.html#getBufferedIO--">getBufferedIO</a>, <a href="../../../org/apache/log4j/FileAppender.html#getBufferSize--">getBufferSize</a>, <a href="../../../org/apache/log4j/FileAppender.html#getFile--">getFile</a>, <a href="../../../org/apache/log4j/FileAppender.html#reset--">reset</a>, <a href="../../../org/apache/log4j/FileAppender.html#setAppend-boolean-">setAppend</a>, <a href="../../../org/apache/log4j/FileAppender.html#setBufferedIO-boolean-">setBufferedIO</a>, <a href="../../../org/apache/log4j/FileAppender.html#setBufferSize-int-">setBufferSize</a>, <a href="../../../org/apache/log4j/FileAppender.html#setFile-java.lang.String-">setFile</a>, <a href="../../../org/apache/log4j/FileAppender.html#setFile-java.lang.String-boolean-boolean-int-">setFile</a>, <a href="../../../org/apache/log4j/FileAppender.html#setQWForFiles-java.io.Writer-">setQWForFiles</a></code></li>
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<h3>Methods inherited from class org.apache.log4j.<a href="../../../org/apache/log4j/WriterAppender.html" title="class in org.apache.log4j">WriterAppender</a></h3>
<code><a href="../../../org/apache/log4j/WriterAppender.html#append-org.apache.log4j.spi.LoggingEvent-">append</a>, <a href="../../../org/apache/log4j/WriterAppender.html#checkEntryConditions--">checkEntryConditions</a>, <a href="../../../org/apache/log4j/WriterAppender.html#close--">close</a>, <a href="../../../org/apache/log4j/WriterAppender.html#closeWriter--">closeWriter</a>, <a href="../../../org/apache/log4j/WriterAppender.html#createWriter-java.io.OutputStream-">createWriter</a>, <a href="../../../org/apache/log4j/WriterAppender.html#getEncoding--">getEncoding</a>, <a href="../../../org/apache/log4j/WriterAppender.html#getImmediateFlush--">getImmediateFlush</a>, <a href="../../../org/apache/log4j/WriterAppender.html#requiresLayout--">requiresLayout</a>, <a href="../../../org/apache/log4j/WriterAppender.html#setEncoding-java.lang.String-">setEncoding</a>, <a href="../../../org/apache/log4j/WriterAppender.html#setErrorHandler-org.apache.log4j.spi.ErrorHandler-">setErrorHandler</a>, <a href="../../../org/apache/log4j/WriterAppender.html#setImmediateFlush-boolean-">setImmediateFlush</a>, <a href="../../../org/apache/log4j/WriterAppender.html#setWriter-java.io.Writer-">setWriter</a>, <a href="../../../org/apache/log4j/WriterAppender.html#shouldFlush-org.apache.log4j.spi.LoggingEvent-">shouldFlush</a>, <a href="../../../org/apache/log4j/WriterAppender.html#writeFooter--">writeFooter</a>, <a href="../../../org/apache/log4j/WriterAppender.html#writeHeader--">writeHeader</a></code></li>
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<h3>Methods inherited from class org.apache.log4j.<a href="../../../org/apache/log4j/AppenderSkeleton.html" title="class in org.apache.log4j">AppenderSkeleton</a></h3>
<code><a href="../../../org/apache/log4j/AppenderSkeleton.html#addFilter-org.apache.log4j.spi.Filter-">addFilter</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#clearFilters--">clearFilters</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#doAppend-org.apache.log4j.spi.LoggingEvent-">doAppend</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#finalize--">finalize</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#getErrorHandler--">getErrorHandler</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#getFilter--">getFilter</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#getFirstFilter--">getFirstFilter</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#getLayout--">getLayout</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#getName--">getName</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#getThreshold--">getThreshold</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#isAsSevereAsThreshold-org.apache.log4j.Priority-">isAsSevereAsThreshold</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#setLayout-org.apache.log4j.Layout-">setLayout</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#setName-java.lang.String-">setName</a>, <a href="../../../org/apache/log4j/AppenderSkeleton.html#setThreshold-org.apache.log4j.Priority-">setThreshold</a></code></li>
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<h4>DailyRollingFileAppender</h4>
<pre>public DailyRollingFileAppender()</pre>
<div class="block">The default constructor does nothing.</div>
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<h4>DailyRollingFileAppender</h4>
<pre>public DailyRollingFileAppender(<a href="../../../org/apache/log4j/Layout.html" title="class in org.apache.log4j">Layout</a> layout,
java.lang.String filename,
java.lang.String datePattern)
throws java.io.IOException</pre>
<div class="block">Instantiate a <code>DailyRollingFileAppender</code> and open the
file designated by <code>filename</code>. The opened filename will
become the ouput destination for this appender.</div>
<dl>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code>java.io.IOException</code></dd>
</dl>
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<h4>setDatePattern</h4>
<pre>public void setDatePattern(java.lang.String pattern)</pre>
<div class="block">The <b>DatePattern</b> takes a string in the same format as
expected by <code>SimpleDateFormat</code>. This options determines the
rollover schedule.</div>
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<h4>getDatePattern</h4>
<pre>public java.lang.String getDatePattern()</pre>
<div class="block">Returns the value of the <b>DatePattern</b> option.</div>
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<h4>activateOptions</h4>
<pre>public void activateOptions()</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class: <code><a href="../../../org/apache/log4j/FileAppender.html#activateOptions--">FileAppender</a></code></span></div>
<div class="block">If the value of <b>File</b> is not <code>null</code>, then <a href="../../../org/apache/log4j/FileAppender.html#setFile-java.lang.String-"><code>FileAppender.setFile(java.lang.String)</code></a> is called with the values of <b>File</b> and
<b>Append</b> properties.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../org/apache/log4j/spi/OptionHandler.html#activateOptions--">activateOptions</a></code> in interface <code><a href="../../../org/apache/log4j/spi/OptionHandler.html" title="interface in org.apache.log4j.spi">OptionHandler</a></code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../../../org/apache/log4j/FileAppender.html#activateOptions--">activateOptions</a></code> in class <code><a href="../../../org/apache/log4j/FileAppender.html" title="class in org.apache.log4j">FileAppender</a></code></dd>
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<h4>subAppend</h4>
<pre>protected void subAppend(<a href="../../../org/apache/log4j/spi/LoggingEvent.html" title="class in org.apache.log4j.spi">LoggingEvent</a> event)</pre>
<div class="block">This method differentiates DailyRollingFileAppender from its
super class.
<p>Before actually logging, this method will check whether it is
time to do a rollover. If it is, it will schedule the next
rollover time and then rollover.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../../../org/apache/log4j/WriterAppender.html#subAppend-org.apache.log4j.spi.LoggingEvent-">subAppend</a></code> in class <code><a href="../../../org/apache/log4j/WriterAppender.html" title="class in org.apache.log4j">WriterAppender</a></code></dd>
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