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AppenderSkeleton (Log4j Version 1.2.16)
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<b>Log4j 1.2.16</b><!-- Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the 'License'); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an 'AS IS' BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. --></EM>
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SUMMARY: NESTED | <A HREF="#field_summary">FIELD</A> | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD>
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org.apache.log4j</FONT>
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Class AppenderSkeleton</H2>
<PRE>
java.lang.Object
<IMG SRC="../../../resources/inherit.gif" ALT="extended by "><B>org.apache.log4j.AppenderSkeleton</B>
</PRE>
<DL>
<DT><B>All Implemented Interfaces:</B> <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>
</DL>
<DL>
<DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../../org/apache/log4j/AsyncAppender.html" title="class in org.apache.log4j">AsyncAppender</A>, <A HREF="../../../org/apache/log4j/jdbc/JDBCAppender.html" title="class in org.apache.log4j.jdbc">JDBCAppender</A>, <A HREF="../../../org/apache/log4j/net/JMSAppender.html" title="class in org.apache.log4j.net">JMSAppender</A>, <A HREF="../../../org/apache/log4j/lf5/LF5Appender.html" title="class in org.apache.log4j.lf5">LF5Appender</A>, <A HREF="../../../org/apache/log4j/nt/NTEventLogAppender.html" title="class in org.apache.log4j.nt">NTEventLogAppender</A>, <A HREF="../../../org/apache/log4j/varia/NullAppender.html" title="class in org.apache.log4j.varia">NullAppender</A>, <A HREF="../../../org/apache/log4j/net/SMTPAppender.html" title="class in org.apache.log4j.net">SMTPAppender</A>, <A HREF="../../../org/apache/log4j/net/SocketAppender.html" title="class in org.apache.log4j.net">SocketAppender</A>, <A HREF="../../../org/apache/log4j/net/SocketHubAppender.html" title="class in org.apache.log4j.net">SocketHubAppender</A>, <A HREF="../../../org/apache/log4j/net/SyslogAppender.html" title="class in org.apache.log4j.net">SyslogAppender</A>, <A HREF="../../../org/apache/log4j/net/TelnetAppender.html" title="class in org.apache.log4j.net">TelnetAppender</A>, <A HREF="../../../org/apache/log4j/WriterAppender.html" title="class in org.apache.log4j">WriterAppender</A></DD>
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<DT><PRE>public abstract class <B>AppenderSkeleton</B><DT>extends java.lang.Object<DT>implements <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></DL>
</PRE>
<P>
Abstract superclass of the other appenders in the package.
This class provides the code for common functionality, such as
support for threshold filtering and support for general filters.
<P>
<P>
<DL>
<DT><B>Since:</B></DT>
<DD>0.8.1</DD>
<DT><B>Author:</B></DT>
<DD>Ceki Gülcü</DD>
</DL>
<HR>
<P>
<!-- =========== FIELD SUMMARY =========== -->
<A NAME="field_summary"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
<B>Field Summary</B></FONT></TH>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/log4j/AppenderSkeleton.html#closed">closed</A></B></CODE>
<BR>
Is this appender closed?</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected <A HREF="../../../org/apache/log4j/spi/ErrorHandler.html" title="interface in org.apache.log4j.spi">ErrorHandler</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/log4j/AppenderSkeleton.html#errorHandler">errorHandler</A></B></CODE>
<BR>
It is assumed and enforced that errorHandler is never null.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected <A HREF="../../../org/apache/log4j/spi/Filter.html" title="class in org.apache.log4j.spi">Filter</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/log4j/AppenderSkeleton.html#headFilter">headFilter</A></B></CODE>
<BR>
The first filter in the filter chain.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected <A HREF="../../../org/apache/log4j/Layout.html" title="class in org.apache.log4j">Layout</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/log4j/AppenderSkeleton.html#layout">layout</A></B></CODE>
<BR>
The layout variable does not need to be set if the appender
implementation has its own layout.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/log4j/AppenderSkeleton.html#name">name</A></B></CODE>
<BR>
Appenders are named.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected <A HREF="../../../org/apache/log4j/spi/Filter.html" title="class in org.apache.log4j.spi">Filter</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/log4j/AppenderSkeleton.html#tailFilter">tailFilter</A></B></CODE>
<BR>
The last filter in the filter chain.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected <A HREF="../../../org/apache/log4j/Priority.html" title="class in org.apache.log4j">Priority</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/log4j/AppenderSkeleton.html#threshold">threshold</A></B></CODE>
<BR>
There is no level threshold filtering by default.</TD>
</TR>
</TABLE>
<!-- ======== CONSTRUCTOR SUMMARY ======== -->
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<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2">
<B>Constructor Summary</B></FONT></TH>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> </CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/log4j/AppenderSkeleton.html#AppenderSkeleton()">AppenderSkeleton</A></B>()</CODE>
<BR>
Create new instance.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected </CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/log4j/AppenderSkeleton.html#AppenderSkeleton(boolean)">AppenderSkeleton</A></B>(boolean isActive)</CODE>
<BR>
Create new instance.</TD>
</TR>
</TABLE>
<!-- ========== METHOD SUMMARY =========== -->
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<B>Method Summary</B></FONT></TH>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/log4j/AppenderSkeleton.html#activateOptions()">activateOptions</A></B>()</CODE>
<BR>
Derived appenders should override this method if option structure
requires it.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/log4j/AppenderSkeleton.html#addFilter(org.apache.log4j.spi.Filter)">addFilter</A></B>(<A HREF="../../../org/apache/log4j/spi/Filter.html" title="class in org.apache.log4j.spi">Filter</A> newFilter)</CODE>
<BR>
Add a filter to end of the filter list.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected abstract void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/log4j/AppenderSkeleton.html#append(org.apache.log4j.spi.LoggingEvent)">append</A></B>(<A HREF="../../../org/apache/log4j/spi/LoggingEvent.html" title="class in org.apache.log4j.spi">LoggingEvent</A> event)</CODE>
<BR>
Subclasses of <code>AppenderSkeleton</code> should implement this
method to perform actual logging.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/log4j/AppenderSkeleton.html#clearFilters()">clearFilters</A></B>()</CODE>
<BR>
Clear the filters chain.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/log4j/AppenderSkeleton.html#doAppend(org.apache.log4j.spi.LoggingEvent)">doAppend</A></B>(<A HREF="../../../org/apache/log4j/spi/LoggingEvent.html" title="class in org.apache.log4j.spi">LoggingEvent</A> event)</CODE>
<BR>
This method performs threshold checks and invokes filters before
delegating actual logging to the subclasses specific <A HREF="../../../org/apache/log4j/AppenderSkeleton.html#append(org.apache.log4j.spi.LoggingEvent)"><CODE>append(org.apache.log4j.spi.LoggingEvent)</CODE></A> method.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/log4j/AppenderSkeleton.html#finalize()">finalize</A></B>()</CODE>
<BR>
Finalize this appender by calling the derived class'
<code>close</code> method.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../../org/apache/log4j/spi/ErrorHandler.html" title="interface in org.apache.log4j.spi">ErrorHandler</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/log4j/AppenderSkeleton.html#getErrorHandler()">getErrorHandler</A></B>()</CODE>
<BR>
Return the currently set <A HREF="../../../org/apache/log4j/spi/ErrorHandler.html" title="interface in org.apache.log4j.spi"><CODE>ErrorHandler</CODE></A> for this
Appender.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../../org/apache/log4j/spi/Filter.html" title="class in org.apache.log4j.spi">Filter</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/log4j/AppenderSkeleton.html#getFilter()">getFilter</A></B>()</CODE>
<BR>
Returns the head Filter.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../../org/apache/log4j/spi/Filter.html" title="class in org.apache.log4j.spi">Filter</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/log4j/AppenderSkeleton.html#getFirstFilter()">getFirstFilter</A></B>()</CODE>
<BR>
Return the first filter in the filter chain for this
Appender.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../../org/apache/log4j/Layout.html" title="class in org.apache.log4j">Layout</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/log4j/AppenderSkeleton.html#getLayout()">getLayout</A></B>()</CODE>
<BR>
Returns the layout of this appender.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/log4j/AppenderSkeleton.html#getName()">getName</A></B>()</CODE>
<BR>
Returns the name of this appender.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> <A HREF="../../../org/apache/log4j/Priority.html" title="class in org.apache.log4j">Priority</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/log4j/AppenderSkeleton.html#getThreshold()">getThreshold</A></B>()</CODE>
<BR>
Returns this appenders threshold level.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/log4j/AppenderSkeleton.html#isAsSevereAsThreshold(org.apache.log4j.Priority)">isAsSevereAsThreshold</A></B>(<A HREF="../../../org/apache/log4j/Priority.html" title="class in org.apache.log4j">Priority</A> priority)</CODE>
<BR>
Check whether the message level is below the appender's
threshold.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/log4j/AppenderSkeleton.html#setErrorHandler(org.apache.log4j.spi.ErrorHandler)">setErrorHandler</A></B>(<A HREF="../../../org/apache/log4j/spi/ErrorHandler.html" title="interface in org.apache.log4j.spi">ErrorHandler</A> eh)</CODE>
<BR>
Set the <A HREF="../../../org/apache/log4j/spi/ErrorHandler.html" title="interface in org.apache.log4j.spi"><CODE>ErrorHandler</CODE></A> for this Appender.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/log4j/AppenderSkeleton.html#setLayout(org.apache.log4j.Layout)">setLayout</A></B>(<A HREF="../../../org/apache/log4j/Layout.html" title="class in org.apache.log4j">Layout</A> layout)</CODE>
<BR>
Set the layout for this appender.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/log4j/AppenderSkeleton.html#setName(java.lang.String)">setName</A></B>(java.lang.String name)</CODE>
<BR>
Set the name of this Appender.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../org/apache/log4j/AppenderSkeleton.html#setThreshold(org.apache.log4j.Priority)">setThreshold</A></B>(<A HREF="../../../org/apache/log4j/Priority.html" title="class in org.apache.log4j">Priority</A> threshold)</CODE>
<BR>
Set the threshold level.</TD>
</TR>
</TABLE>
<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Methods inherited from class java.lang.Object</B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE>clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD>
</TR>
</TABLE>
<A NAME="methods_inherited_from_class_org.apache.log4j.Appender"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TH ALIGN="left"><B>Methods inherited from interface org.apache.log4j.<A HREF="../../../org/apache/log4j/Appender.html" title="interface in org.apache.log4j">Appender</A></B></TH>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../org/apache/log4j/Appender.html#close()">close</A>, <A HREF="../../../org/apache/log4j/Appender.html#requiresLayout()">requiresLayout</A></CODE></TD>
</TR>
</TABLE>
<P>
<!-- ============ FIELD DETAIL =========== -->
<A NAME="field_detail"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
<B>Field Detail</B></FONT></TH>
</TR>
</TABLE>
<A NAME="layout"><!-- --></A><H3>
layout</H3>
<PRE>
protected <A HREF="../../../org/apache/log4j/Layout.html" title="class in org.apache.log4j">Layout</A> <B>layout</B></PRE>
<DL>
<DD>The layout variable does not need to be set if the appender
implementation has its own layout.
<P>
<DL>
</DL>
</DL>
<HR>
<A NAME="name"><!-- --></A><H3>
name</H3>
<PRE>
protected java.lang.String <B>name</B></PRE>
<DL>
<DD>Appenders are named.
<P>
<DL>
</DL>
</DL>
<HR>
<A NAME="threshold"><!-- --></A><H3>
threshold</H3>
<PRE>
protected <A HREF="../../../org/apache/log4j/Priority.html" title="class in org.apache.log4j">Priority</A> <B>threshold</B></PRE>
<DL>
<DD>There is no level threshold filtering by default.
<P>
<DL>
</DL>
</DL>
<HR>
<A NAME="errorHandler"><!-- --></A><H3>
errorHandler</H3>
<PRE>
protected <A HREF="../../../org/apache/log4j/spi/ErrorHandler.html" title="interface in org.apache.log4j.spi">ErrorHandler</A> <B>errorHandler</B></PRE>
<DL>
<DD>It is assumed and enforced that errorHandler is never null.
<P>
<DL>
</DL>
</DL>
<HR>
<A NAME="headFilter"><!-- --></A><H3>
headFilter</H3>
<PRE>
protected <A HREF="../../../org/apache/log4j/spi/Filter.html" title="class in org.apache.log4j.spi">Filter</A> <B>headFilter</B></PRE>
<DL>
<DD>The first filter in the filter chain. Set to <code>null</code>
initially.
<P>
<DL>
</DL>
</DL>
<HR>
<A NAME="tailFilter"><!-- --></A><H3>
tailFilter</H3>
<PRE>
protected <A HREF="../../../org/apache/log4j/spi/Filter.html" title="class in org.apache.log4j.spi">Filter</A> <B>tailFilter</B></PRE>
<DL>
<DD>The last filter in the filter chain.
<P>
<DL>
</DL>
</DL>
<HR>
<A NAME="closed"><!-- --></A><H3>
closed</H3>
<PRE>
protected boolean <B>closed</B></PRE>
<DL>
<DD>Is this appender closed?
<P>
<DL>
</DL>
</DL>
<!-- ========= CONSTRUCTOR DETAIL ======== -->
<A NAME="constructor_detail"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
<B>Constructor Detail</B></FONT></TH>
</TR>
</TABLE>
<A NAME="AppenderSkeleton()"><!-- --></A><H3>
AppenderSkeleton</H3>
<PRE>
public <B>AppenderSkeleton</B>()</PRE>
<DL>
<DD>Create new instance.
<P>
</DL>
<HR>
<A NAME="AppenderSkeleton(boolean)"><!-- --></A><H3>
AppenderSkeleton</H3>
<PRE>
protected <B>AppenderSkeleton</B>(boolean isActive)</PRE>
<DL>
<DD>Create new instance.
Provided for compatibility with log4j 1.3.
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>isActive</CODE> - true if appender is ready for use upon construction.
Not used in log4j 1.2.x.<DT><B>Since:</B></DT>
<DD>1.2.15</DD>
</DL>
</DL>
<!-- ============ METHOD DETAIL ========== -->
<A NAME="method_detail"><!-- --></A>
<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2">
<B>Method Detail</B></FONT></TH>
</TR>
</TABLE>
<A NAME="activateOptions()"><!-- --></A><H3>
activateOptions</H3>
<PRE>
public void <B>activateOptions</B>()</PRE>
<DL>
<DD>Derived appenders should override this method if option structure
requires it.
<P>
<DD><DL>
<DT><B>Specified by:</B><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></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="addFilter(org.apache.log4j.spi.Filter)"><!-- --></A><H3>
addFilter</H3>
<PRE>
public void <B>addFilter</B>(<A HREF="../../../org/apache/log4j/spi/Filter.html" title="class in org.apache.log4j.spi">Filter</A> newFilter)</PRE>
<DL>
<DD>Add a filter to end of the filter list.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/apache/log4j/Appender.html#addFilter(org.apache.log4j.spi.Filter)">addFilter</A></CODE> in interface <CODE><A HREF="../../../org/apache/log4j/Appender.html" title="interface in org.apache.log4j">Appender</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Since:</B></DT>
<DD>0.9.0</DD>
</DL>
</DD>
</DL>
<HR>
<A NAME="append(org.apache.log4j.spi.LoggingEvent)"><!-- --></A><H3>
append</H3>
<PRE>
protected abstract void <B>append</B>(<A HREF="../../../org/apache/log4j/spi/LoggingEvent.html" title="class in org.apache.log4j.spi">LoggingEvent</A> event)</PRE>
<DL>
<DD>Subclasses of <code>AppenderSkeleton</code> should implement this
method to perform actual logging. See also <A HREF="../../../org/apache/log4j/AppenderSkeleton.html#doAppend(org.apache.log4j.spi.LoggingEvent)"><CODE>AppenderSkeleton.doAppend</CODE></A> method.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Since:</B></DT>
<DD>0.9.0</DD>
</DL>
</DD>
</DL>
<HR>
<A NAME="clearFilters()"><!-- --></A><H3>
clearFilters</H3>
<PRE>
public void <B>clearFilters</B>()</PRE>
<DL>
<DD>Clear the filters chain.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/apache/log4j/Appender.html#clearFilters()">clearFilters</A></CODE> in interface <CODE><A HREF="../../../org/apache/log4j/Appender.html" title="interface in org.apache.log4j">Appender</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Since:</B></DT>
<DD>0.9.0</DD>
</DL>
</DD>
</DL>
<HR>
<A NAME="finalize()"><!-- --></A><H3>
finalize</H3>
<PRE>
public void <B>finalize</B>()</PRE>
<DL>
<DD>Finalize this appender by calling the derived class'
<code>close</code> method.
<P>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE>finalize</CODE> in class <CODE>java.lang.Object</CODE></DL>
</DD>
<DD><DL>
<DT><B>Since:</B></DT>
<DD>0.8.4</DD>
</DL>
</DD>
</DL>
<HR>
<A NAME="getErrorHandler()"><!-- --></A><H3>
getErrorHandler</H3>
<PRE>
public <A HREF="../../../org/apache/log4j/spi/ErrorHandler.html" title="interface in org.apache.log4j.spi">ErrorHandler</A> <B>getErrorHandler</B>()</PRE>
<DL>
<DD>Return the currently set <A HREF="../../../org/apache/log4j/spi/ErrorHandler.html" title="interface in org.apache.log4j.spi"><CODE>ErrorHandler</CODE></A> for this
Appender.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/apache/log4j/Appender.html#getErrorHandler()">getErrorHandler</A></CODE> in interface <CODE><A HREF="../../../org/apache/log4j/Appender.html" title="interface in org.apache.log4j">Appender</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Since:</B></DT>
<DD>0.9.0</DD>
</DL>
</DD>
</DL>
<HR>
<A NAME="getFilter()"><!-- --></A><H3>
getFilter</H3>
<PRE>
public <A HREF="../../../org/apache/log4j/spi/Filter.html" title="class in org.apache.log4j.spi">Filter</A> <B>getFilter</B>()</PRE>
<DL>
<DD>Returns the head Filter.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/apache/log4j/Appender.html#getFilter()">getFilter</A></CODE> in interface <CODE><A HREF="../../../org/apache/log4j/Appender.html" title="interface in org.apache.log4j">Appender</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>the head Filter or null, if no Filters are present<DT><B>Since:</B></DT>
<DD>1.1</DD>
</DL>
</DD>
</DL>
<HR>
<A NAME="getFirstFilter()"><!-- --></A><H3>
getFirstFilter</H3>
<PRE>
public final <A HREF="../../../org/apache/log4j/spi/Filter.html" title="class in org.apache.log4j.spi">Filter</A> <B>getFirstFilter</B>()</PRE>
<DL>
<DD>Return the first filter in the filter chain for this
Appender. The return value may be <code>null</code> if no is
filter is set.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="getLayout()"><!-- --></A><H3>
getLayout</H3>
<PRE>
public <A HREF="../../../org/apache/log4j/Layout.html" title="class in org.apache.log4j">Layout</A> <B>getLayout</B>()</PRE>
<DL>
<DD>Returns the layout of this appender. The value may be null.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/apache/log4j/Appender.html#getLayout()">getLayout</A></CODE> in interface <CODE><A HREF="../../../org/apache/log4j/Appender.html" title="interface in org.apache.log4j">Appender</A></CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="getName()"><!-- --></A><H3>
getName</H3>
<PRE>
public final java.lang.String <B>getName</B>()</PRE>
<DL>
<DD>Returns the name of this appender.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/apache/log4j/Appender.html#getName()">getName</A></CODE> in interface <CODE><A HREF="../../../org/apache/log4j/Appender.html" title="interface in org.apache.log4j">Appender</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>name, may be null.</DL>
</DD>
</DL>
<HR>
<A NAME="getThreshold()"><!-- --></A><H3>
getThreshold</H3>
<PRE>
public <A HREF="../../../org/apache/log4j/Priority.html" title="class in org.apache.log4j">Priority</A> <B>getThreshold</B>()</PRE>
<DL>
<DD>Returns this appenders threshold level. See the <A HREF="../../../org/apache/log4j/AppenderSkeleton.html#setThreshold(org.apache.log4j.Priority)"><CODE>setThreshold(org.apache.log4j.Priority)</CODE></A> method for the meaning of this option.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Since:</B></DT>
<DD>1.1</DD>
</DL>
</DD>
</DL>
<HR>
<A NAME="isAsSevereAsThreshold(org.apache.log4j.Priority)"><!-- --></A><H3>
isAsSevereAsThreshold</H3>
<PRE>
public boolean <B>isAsSevereAsThreshold</B>(<A HREF="../../../org/apache/log4j/Priority.html" title="class in org.apache.log4j">Priority</A> priority)</PRE>
<DL>
<DD>Check whether the message level is below the appender's
threshold. If there is no threshold set, then the return value is
always <code>true</code>.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="doAppend(org.apache.log4j.spi.LoggingEvent)"><!-- --></A><H3>
doAppend</H3>
<PRE>
public void <B>doAppend</B>(<A HREF="../../../org/apache/log4j/spi/LoggingEvent.html" title="class in org.apache.log4j.spi">LoggingEvent</A> event)</PRE>
<DL>
<DD>This method performs threshold checks and invokes filters before
delegating actual logging to the subclasses specific <A HREF="../../../org/apache/log4j/AppenderSkeleton.html#append(org.apache.log4j.spi.LoggingEvent)"><CODE>append(org.apache.log4j.spi.LoggingEvent)</CODE></A> method.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/apache/log4j/Appender.html#doAppend(org.apache.log4j.spi.LoggingEvent)">doAppend</A></CODE> in interface <CODE><A HREF="../../../org/apache/log4j/Appender.html" title="interface in org.apache.log4j">Appender</A></CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="setErrorHandler(org.apache.log4j.spi.ErrorHandler)"><!-- --></A><H3>
setErrorHandler</H3>
<PRE>
public void <B>setErrorHandler</B>(<A HREF="../../../org/apache/log4j/spi/ErrorHandler.html" title="interface in org.apache.log4j.spi">ErrorHandler</A> eh)</PRE>
<DL>
<DD>Set the <A HREF="../../../org/apache/log4j/spi/ErrorHandler.html" title="interface in org.apache.log4j.spi"><CODE>ErrorHandler</CODE></A> for this Appender.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/apache/log4j/Appender.html#setErrorHandler(org.apache.log4j.spi.ErrorHandler)">setErrorHandler</A></CODE> in interface <CODE><A HREF="../../../org/apache/log4j/Appender.html" title="interface in org.apache.log4j">Appender</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Since:</B></DT>
<DD>0.9.0</DD>
</DL>
</DD>
</DL>
<HR>
<A NAME="setLayout(org.apache.log4j.Layout)"><!-- --></A><H3>
setLayout</H3>
<PRE>
public void <B>setLayout</B>(<A HREF="../../../org/apache/log4j/Layout.html" title="class in org.apache.log4j">Layout</A> layout)</PRE>
<DL>
<DD>Set the layout for this appender. Note that some appenders have
their own (fixed) layouts or do not use one. For example, the
<A HREF="../../../org/apache/log4j/net/SocketAppender.html" title="class in org.apache.log4j.net"><CODE>SocketAppender</CODE></A> ignores the layout set
here.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/apache/log4j/Appender.html#setLayout(org.apache.log4j.Layout)">setLayout</A></CODE> in interface <CODE><A HREF="../../../org/apache/log4j/Appender.html" title="interface in org.apache.log4j">Appender</A></CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="setName(java.lang.String)"><!-- --></A><H3>
setName</H3>
<PRE>
public void <B>setName</B>(java.lang.String name)</PRE>
<DL>
<DD>Set the name of this Appender.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../org/apache/log4j/Appender.html#setName(java.lang.String)">setName</A></CODE> in interface <CODE><A HREF="../../../org/apache/log4j/Appender.html" title="interface in org.apache.log4j">Appender</A></CODE></DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="setThreshold(org.apache.log4j.Priority)"><!-- --></A><H3>
setThreshold</H3>
<PRE>
public void <B>setThreshold</B>(<A HREF="../../../org/apache/log4j/Priority.html" title="class in org.apache.log4j">Priority</A> threshold)</PRE>
<DL>
<DD>Set the threshold level. All log events with lower level
than the threshold level are ignored by the appender.
<p>In configuration files this option is specified by setting the
value of the <b>Threshold</b> option to a level
string, such as "DEBUG", "INFO" and so on.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Since:</B></DT>
<DD>0.8.3</DD>
</DL>
</DD>
</DL>
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<b>Log4j 1.2.16</b><!-- Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the 'License'); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an 'AS IS' BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. --></EM>
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