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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<title>Apache log4cxx: Appender Class Reference</title>
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<a class="el" href="namespacelog4cxx.html">log4cxx</a>::<a class="el" href="classlog4cxx_1_1_appender.html">Appender</a></div>
<h1>Appender Class Reference</h1><!-- doxytag: class="log4cxx::Appender" --><!-- doxytag: inherits="log4cxx::spi::OptionHandler" -->Inherits <a class="el" href="classlog4cxx_1_1spi_1_1_option_handler.html">OptionHandler</a>.
<p>
Inherited by <a class="el" href="classlog4cxx_1_1_appender_skeleton.html">AppenderSkeleton</a><code> [virtual]</code>.
<p>
<a href="classlog4cxx_1_1_appender-members.html">List of all members.</a><hr><a name="_details"></a><h2>Detailed Description</h2>
Implement this interface for your own strategies for outputting log statements.
<p>
<table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="classlog4cxx_1_1_appender.html#15a14100e46e406766b1c92c670948e1">~Appender</a> ()</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="classlog4cxx_1_1_appender.html#06931700a645a1cf08353968672d5dfe">addFilter</a> (const <a class="el" href="classlog4cxx_1_1helpers_1_1_object_ptr_t.html">spi::FilterPtr</a> &newFilter)=0</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Add a filter to the end of the filter list. <a href="#06931700a645a1cf08353968672d5dfe"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual <a class="el" href="classlog4cxx_1_1helpers_1_1_object_ptr_t.html">spi::FilterPtr</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classlog4cxx_1_1_appender.html#31134324f99ee92e17f359e3daa05ca7">getFilter</a> () const =0</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns the head Filter. <a href="#31134324f99ee92e17f359e3daa05ca7"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="classlog4cxx_1_1_appender.html#5219689d2c359a4bf6ddc48ea1e8dd42">clearFilters</a> ()=0</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Clear the list of filters by removing all the filters in it. <a href="#5219689d2c359a4bf6ddc48ea1e8dd42"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="classlog4cxx_1_1_appender.html#f6ee7eacbde6b379b68d954e44f6e549">close</a> ()=0</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Release any resources allocated within the appender such as file handles, network connections, etc. <a href="#f6ee7eacbde6b379b68d954e44f6e549"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="classlog4cxx_1_1_appender.html#e78c4f3ccf2a3b33eb83d76e49e79dc6">doAppend</a> (const <a class="el" href="classlog4cxx_1_1helpers_1_1_object_ptr_t.html">spi::LoggingEventPtr</a> &event, <a class="el" href="classlog4cxx_1_1helpers_1_1_pool.html">log4cxx::helpers::Pool</a> &pool)=0</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Log in <code><a class="el" href="classlog4cxx_1_1_appender.html">Appender</a></code> specific way. <a href="#e78c4f3ccf2a3b33eb83d76e49e79dc6"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual <a class="el" href="namespacelog4cxx.html#d7ec98d27bca7666e23f27dd1fb181c8">LogString</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classlog4cxx_1_1_appender.html#e7a22efd00c94d9d06b832fe6953baa3">getName</a> () const =0</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get the name of this appender. <a href="#e7a22efd00c94d9d06b832fe6953baa3"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="classlog4cxx_1_1_appender.html#88cfba44fa745f658fab9b8c6a8d959f">setLayout</a> (const <a class="el" href="classlog4cxx_1_1helpers_1_1_object_ptr_t.html">LayoutPtr</a> &layout)=0</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Set the <a class="el" href="classlog4cxx_1_1_layout.html">Layout</a> for this appender. <a href="#88cfba44fa745f658fab9b8c6a8d959f"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual <a class="el" href="classlog4cxx_1_1helpers_1_1_object_ptr_t.html">LayoutPtr</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classlog4cxx_1_1_appender.html#1ec13ad0f8e6a13f91dc7a7ce7a4a564">getLayout</a> () const =0</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Returns this appenders layout. <a href="#1ec13ad0f8e6a13f91dc7a7ce7a4a564"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="classlog4cxx_1_1_appender.html#46473dcf1999f98a4c97168a3d2c7c84">setName</a> (const <a class="el" href="namespacelog4cxx.html#d7ec98d27bca7666e23f27dd1fb181c8">LogString</a> &name)=0</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Set the name of this appender. <a href="#46473dcf1999f98a4c97168a3d2c7c84"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">virtual bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classlog4cxx_1_1_appender.html#1fa0a21a0f0a6ec3a9e92a98db9ffa85">requiresLayout</a> () const =0</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Configurators call this method to determine if the appender requires a layout. <a href="#1fa0a21a0f0a6ec3a9e92a98db9ffa85"></a><br></td></tr>
</table>
<hr><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" name="15a14100e46e406766b1c92c670948e1"></a><!-- doxytag: member="log4cxx::Appender::~Appender" ref="15a14100e46e406766b1c92c670948e1" args="()" --><p>
<table class="mdTable" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">virtual ~<a class="el" href="classlog4cxx_1_1_appender.html">Appender</a> </td>
<td class="md" valign="top">( </td>
<td class="mdname1" valign="top" nowrap> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap><code> [inline, virtual]</code></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
</td>
</tr>
</table>
<hr><h2>Member Function Documentation</h2>
<a class="anchor" name="06931700a645a1cf08353968672d5dfe"></a><!-- doxytag: member="log4cxx::Appender::addFilter" ref="06931700a645a1cf08353968672d5dfe" args="(const spi::FilterPtr &newFilter)=0" --><p>
<table class="mdTable" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
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<td class="md" nowrap valign="top">virtual void addFilter </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">const <a class="el" href="classlog4cxx_1_1helpers_1_1_object_ptr_t.html">spi::FilterPtr</a> & </td>
<td class="mdname1" valign="top" nowrap> <em>newFilter</em> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap><code> [pure virtual]</code></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
Add a filter to the end of the filter list.
<p>
<p>
Implemented in <a class="el" href="classlog4cxx_1_1_appender_skeleton.html#8a4525ba6d2efe017934bbd867186ec3">AppenderSkeleton</a>. </td>
</tr>
</table>
<a class="anchor" name="5219689d2c359a4bf6ddc48ea1e8dd42"></a><!-- doxytag: member="log4cxx::Appender::clearFilters" ref="5219689d2c359a4bf6ddc48ea1e8dd42" args="()=0" --><p>
<table class="mdTable" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">virtual void clearFilters </td>
<td class="md" valign="top">( </td>
<td class="mdname1" valign="top" nowrap> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap><code> [pure virtual]</code></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
Clear the list of filters by removing all the filters in it.
<p>
<p>
Implemented in <a class="el" href="classlog4cxx_1_1_appender_skeleton.html#f13013b8fd73be124730ec9f299c234d">AppenderSkeleton</a>. </td>
</tr>
</table>
<a class="anchor" name="f6ee7eacbde6b379b68d954e44f6e549"></a><!-- doxytag: member="log4cxx::Appender::close" ref="f6ee7eacbde6b379b68d954e44f6e549" args="()=0" --><p>
<table class="mdTable" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">virtual void close </td>
<td class="md" valign="top">( </td>
<td class="mdname1" valign="top" nowrap> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap><code> [pure virtual]</code></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
Release any resources allocated within the appender such as file handles, network connections, etc.
<p>
It is a programming error to append to a closed appender.
<p>
Implemented in <a class="el" href="classlog4cxx_1_1_async_appender.html#5ae591df94fc66ccb85cbb6565368bca">AsyncAppender</a>, <a class="el" href="classlog4cxx_1_1db_1_1_o_d_b_c_appender.html#47feccb1873356363e4d0e302bc3822c">ODBCAppender</a>, <a class="el" href="classlog4cxx_1_1net_1_1_s_m_t_p_appender.html#47feccb1873356363e4d0e302bc3822c">SMTPAppender</a>, <a class="el" href="classlog4cxx_1_1net_1_1_socket_appender_skeleton.html#5ae591df94fc66ccb85cbb6565368bca">SocketAppenderSkeleton</a>, <a class="el" href="classlog4cxx_1_1net_1_1_socket_hub_appender.html#47feccb1873356363e4d0e302bc3822c">SocketHubAppender</a>, <a class="el" href="classlog4cxx_1_1net_1_1_syslog_appender.html#5ae591df94fc66ccb85cbb6565368bca">SyslogAppender</a>, <a class="el" href="classlog4cxx_1_1net_1_1_telnet_appender.html#5ae591df94fc66ccb85cbb6565368bca">TelnetAppender</a>, <a class="el" href="classlog4cxx_1_1nt_1_1_n_t_event_log_appender.html#47feccb1873356363e4d0e302bc3822c">NTEventLogAppender</a>, <a class="el" href="classlog4cxx_1_1nt_1_1_output_debug_string_appender.html#47feccb1873356363e4d0e302bc3822c">OutputDebugStringAppender</a>, <a class="el" href="classlog4cxx_1_1rolling_1_1_rolling_file_appender_skeleton.html#5ae591df94fc66ccb85cbb6565368bca">RollingFileAppenderSkeleton</a>, and <a class="el" href="classlog4cxx_1_1_writer_appender.html#47feccb1873356363e4d0e302bc3822c">WriterAppender</a>. </td>
</tr>
</table>
<a class="anchor" name="e78c4f3ccf2a3b33eb83d76e49e79dc6"></a><!-- doxytag: member="log4cxx::Appender::doAppend" ref="e78c4f3ccf2a3b33eb83d76e49e79dc6" args="(const spi::LoggingEventPtr &event, log4cxx::helpers::Pool &pool)=0" --><p>
<table class="mdTable" cellpadding="2" cellspacing="0">
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<td class="mdRow">
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<td class="md" nowrap valign="top">virtual void doAppend </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">const <a class="el" href="classlog4cxx_1_1helpers_1_1_object_ptr_t.html">spi::LoggingEventPtr</a> & </td>
<td class="mdname" nowrap> <em>event</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td class="md"></td>
<td class="md" nowrap><a class="el" href="classlog4cxx_1_1helpers_1_1_pool.html">log4cxx::helpers::Pool</a> & </td>
<td class="mdname" nowrap> <em>pool</em></td>
</tr>
<tr>
<td class="md"></td>
<td class="md">) </td>
<td class="md" colspan="2"><code> [pure virtual]</code></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
Log in <code><a class="el" href="classlog4cxx_1_1_appender.html">Appender</a></code> specific way.
<p>
When appropriate, Loggers will call the <code>doAppend</code> method of appender implementations in order to log.
<p>
Implemented in <a class="el" href="classlog4cxx_1_1_appender_skeleton.html#2df87e9db87ebe5396ea94fb9c25c488">AppenderSkeleton</a>. </td>
</tr>
</table>
<a class="anchor" name="31134324f99ee92e17f359e3daa05ca7"></a><!-- doxytag: member="log4cxx::Appender::getFilter" ref="31134324f99ee92e17f359e3daa05ca7" args="() const =0" --><p>
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<td class="md" nowrap valign="top">virtual <a class="el" href="classlog4cxx_1_1helpers_1_1_object_ptr_t.html">spi::FilterPtr</a> getFilter </td>
<td class="md" valign="top">( </td>
<td class="mdname1" valign="top" nowrap> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap> const<code> [pure virtual]</code></td>
</tr>
</table>
</td>
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<table cellspacing="5" cellpadding="0" border="0">
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<td>
</td>
<td>
<p>
Returns the head Filter.
<p>
The Filters are organized in a linked list and so all Filters on this <a class="el" href="classlog4cxx_1_1_appender.html">Appender</a> are available through the result.<p>
<dl compact><dt><b>Returns:</b></dt><dd>the head Filter or null, if no Filters are present </dd></dl>
<p>
Implemented in <a class="el" href="classlog4cxx_1_1_appender_skeleton.html#459cdb3654725c5dbc68ac4e4a8b980e">AppenderSkeleton</a>. </td>
</tr>
</table>
<a class="anchor" name="1ec13ad0f8e6a13f91dc7a7ce7a4a564"></a><!-- doxytag: member="log4cxx::Appender::getLayout" ref="1ec13ad0f8e6a13f91dc7a7ce7a4a564" args="() const =0" --><p>
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<td class="md" nowrap valign="top">virtual <a class="el" href="classlog4cxx_1_1helpers_1_1_object_ptr_t.html">LayoutPtr</a> getLayout </td>
<td class="md" valign="top">( </td>
<td class="mdname1" valign="top" nowrap> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap> const<code> [pure virtual]</code></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
Returns this appenders layout.
<p>
<p>
Implemented in <a class="el" href="classlog4cxx_1_1_appender_skeleton.html#f54e877f133079a04e7c210c0d3ad5dc">AppenderSkeleton</a>. </td>
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<a class="anchor" name="e7a22efd00c94d9d06b832fe6953baa3"></a><!-- doxytag: member="log4cxx::Appender::getName" ref="e7a22efd00c94d9d06b832fe6953baa3" args="() const =0" --><p>
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<td class="md" nowrap valign="top">virtual <a class="el" href="namespacelog4cxx.html#d7ec98d27bca7666e23f27dd1fb181c8">LogString</a> getName </td>
<td class="md" valign="top">( </td>
<td class="mdname1" valign="top" nowrap> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap> const<code> [pure virtual]</code></td>
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<p>
Get the name of this appender.
<p>
The name uniquely identifies the appender.
<p>
Implemented in <a class="el" href="classlog4cxx_1_1_appender_skeleton.html#c22a8d65fdc07f5b0e52c935b0ee055f">AppenderSkeleton</a>. </td>
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<a class="anchor" name="1fa0a21a0f0a6ec3a9e92a98db9ffa85"></a><!-- doxytag: member="log4cxx::Appender::requiresLayout" ref="1fa0a21a0f0a6ec3a9e92a98db9ffa85" args="() const =0" --><p>
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<td class="md" nowrap valign="top">virtual bool requiresLayout </td>
<td class="md" valign="top">( </td>
<td class="mdname1" valign="top" nowrap> </td>
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<td class="md" nowrap> const<code> [pure virtual]</code></td>
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<p>
Configurators call this method to determine if the appender requires a layout.
<p>
If this method returns <code>true</code>, meaning that layout is required, then the configurator will configure an layout using the configuration information at its disposal. If this method returns <code>false</code>, meaning that a layout is not required, then layout configuration will be skipped even if there is available layout configuration information at the disposal of the configurator..<p>
In the rather exceptional case, where the appender implementation admits a layout but can also work without it, then the appender should return <code>true</code>.
<p>
Implemented in <a class="el" href="classlog4cxx_1_1_async_appender.html#4312e727a9ea814779d2c9950dc3c73e">AsyncAppender</a>, <a class="el" href="classlog4cxx_1_1db_1_1_o_d_b_c_appender.html#4312e727a9ea814779d2c9950dc3c73e">ODBCAppender</a>, <a class="el" href="classlog4cxx_1_1net_1_1_s_m_t_p_appender.html#4312e727a9ea814779d2c9950dc3c73e">SMTPAppender</a>, <a class="el" href="classlog4cxx_1_1net_1_1_socket_appender_skeleton.html#a401613183830542f9c6b1c425198cdc">SocketAppenderSkeleton</a>, <a class="el" href="classlog4cxx_1_1net_1_1_socket_hub_appender.html#4312e727a9ea814779d2c9950dc3c73e">SocketHubAppender</a>, <a class="el" href="classlog4cxx_1_1net_1_1_syslog_appender.html#4312e727a9ea814779d2c9950dc3c73e">SyslogAppender</a>, <a class="el" href="classlog4cxx_1_1net_1_1_telnet_appender.html#4312e727a9ea814779d2c9950dc3c73e">TelnetAppender</a>, <a class="el" href="classlog4cxx_1_1nt_1_1_n_t_event_log_appender.html#a401613183830542f9c6b1c425198cdc">NTEventLogAppender</a>, <a class="el" href="classlog4cxx_1_1nt_1_1_output_debug_string_appender.html#a401613183830542f9c6b1c425198cdc">OutputDebugStringAppender</a>, and <a class="el" href="classlog4cxx_1_1_writer_appender.html#4312e727a9ea814779d2c9950dc3c73e">WriterAppender</a>. </td>
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<a class="anchor" name="88cfba44fa745f658fab9b8c6a8d959f"></a><!-- doxytag: member="log4cxx::Appender::setLayout" ref="88cfba44fa745f658fab9b8c6a8d959f" args="(const LayoutPtr &layout)=0" --><p>
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<td class="md" nowrap valign="top">virtual void setLayout </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">const <a class="el" href="classlog4cxx_1_1helpers_1_1_object_ptr_t.html">LayoutPtr</a> & </td>
<td class="mdname1" valign="top" nowrap> <em>layout</em> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap><code> [pure virtual]</code></td>
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<p>
Set the <a class="el" href="classlog4cxx_1_1_layout.html">Layout</a> for this appender.
<p>
<p>
Implemented in <a class="el" href="classlog4cxx_1_1_appender_skeleton.html#115922e0a4ce63e2145c8861aac07c7f">AppenderSkeleton</a>. </td>
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<a class="anchor" name="46473dcf1999f98a4c97168a3d2c7c84"></a><!-- doxytag: member="log4cxx::Appender::setName" ref="46473dcf1999f98a4c97168a3d2c7c84" args="(const LogString &name)=0" --><p>
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<td class="md" nowrap valign="top">virtual void setName </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">const <a class="el" href="namespacelog4cxx.html#d7ec98d27bca7666e23f27dd1fb181c8">LogString</a> & </td>
<td class="mdname1" valign="top" nowrap> <em>name</em> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap><code> [pure virtual]</code></td>
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<p>
Set the name of this appender.
<p>
The name is used by other components to identify this appender.
<p>
Implemented in <a class="el" href="classlog4cxx_1_1_appender_skeleton.html#87e335b8d195a30dbdfe18d5da24b047">AppenderSkeleton</a>. </td>
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<hr>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="appender_8h.html">appender.h</a></ul>
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