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ErrorHandler (Apache Log4j 1.2.15 API)
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org.apache.log4j.spi</FONT>
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Interface ErrorHandler</H2>
<DL>
<DT><B>All Superinterfaces:</B> <DD><A HREF="../../../../org/apache/log4j/spi/OptionHandler.html" title="interface in org.apache.log4j.spi">OptionHandler</A></DD>
</DL>
<DL>
<DT><B>All Known Implementing Classes:</B> <DD><A HREF="../../../../org/apache/log4j/varia/FallbackErrorHandler.html" title="class in org.apache.log4j.varia">FallbackErrorHandler</A>, <A HREF="../../../../org/apache/log4j/helpers/OnlyOnceErrorHandler.html" title="class in org.apache.log4j.helpers">OnlyOnceErrorHandler</A></DD>
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<DT><PRE>public interface <B>ErrorHandler</B><DT>extends <A HREF="../../../../org/apache/log4j/spi/OptionHandler.html" title="interface in org.apache.log4j.spi">OptionHandler</A></DL>
</PRE>
<P>
Appenders may delegate their error handling to
<code>ErrorHandlers</code>.
<p>Error handling is a particularly tedious to get right because by
definition errors are hard to predict and to reproduce.
<p>Please take the time to contact the author in case you discover
that errors are not properly handled. You are most welcome to
suggest new error handling policies or criticize existing policies.
<P>
<P>
<DL>
<DT><B>Author:</B></DT>
<DD>Ceki Gülcü</DD>
</DL>
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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/spi/ErrorHandler.html#error(java.lang.String)">error</A></B>(java.lang.String message)</CODE>
<BR>
This method is normally used to just print the error message
passed as a parameter.</TD>
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/log4j/spi/ErrorHandler.html#error(java.lang.String, java.lang.Exception, int)">error</A></B>(java.lang.String message,
java.lang.Exception e,
int errorCode)</CODE>
<BR>
Equivalent to the <A HREF="../../../../org/apache/log4j/spi/ErrorHandler.html#error(java.lang.String, java.lang.Exception, int, org.apache.log4j.spi.LoggingEvent)"><CODE>error(String, Exception, int,
LoggingEvent event)</CODE></A> with the the event parameteter set to
<code>null</code>.</TD>
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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/spi/ErrorHandler.html#error(java.lang.String, java.lang.Exception, int, org.apache.log4j.spi.LoggingEvent)">error</A></B>(java.lang.String message,
java.lang.Exception e,
int errorCode,
<A HREF="../../../../org/apache/log4j/spi/LoggingEvent.html" title="class in org.apache.log4j.spi">LoggingEvent</A> event)</CODE>
<BR>
This method is invoked to handle the error.</TD>
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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/spi/ErrorHandler.html#setAppender(org.apache.log4j.Appender)">setAppender</A></B>(<A HREF="../../../../org/apache/log4j/Appender.html" title="interface in org.apache.log4j">Appender</A> appender)</CODE>
<BR>
Set the appender for which errors are handled.</TD>
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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/spi/ErrorHandler.html#setBackupAppender(org.apache.log4j.Appender)">setBackupAppender</A></B>(<A HREF="../../../../org/apache/log4j/Appender.html" title="interface in org.apache.log4j">Appender</A> appender)</CODE>
<BR>
Set the appender to falkback upon in case of failure.</TD>
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/log4j/spi/ErrorHandler.html#setLogger(org.apache.log4j.Logger)">setLogger</A></B>(<A HREF="../../../../org/apache/log4j/Logger.html" title="class in org.apache.log4j">Logger</A> logger)</CODE>
<BR>
Add a reference to a logger to which the failing appender might
be attached to.</TD>
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<TH ALIGN="left"><B>Methods inherited from interface org.apache.log4j.spi.<A HREF="../../../../org/apache/log4j/spi/OptionHandler.html" title="interface in org.apache.log4j.spi">OptionHandler</A></B></TH>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="../../../../org/apache/log4j/spi/OptionHandler.html#activateOptions()">activateOptions</A></CODE></TD>
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<A NAME="setLogger(org.apache.log4j.Logger)"><!-- --></A><H3>
setLogger</H3>
<PRE>
void <B>setLogger</B>(<A HREF="../../../../org/apache/log4j/Logger.html" title="class in org.apache.log4j">Logger</A> logger)</PRE>
<DL>
<DD>Add a reference to a logger to which the failing appender might
be attached to. The failing appender will be searched and
replaced only in the loggers you add through this method.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>logger</CODE> - One of the loggers that will be searched for the failing
appender in view of replacement.<DT><B>Since:</B></DT>
<DD>1.2</DD>
</DL>
</DD>
</DL>
<HR>
<A NAME="error(java.lang.String, java.lang.Exception, int)"><!-- --></A><H3>
error</H3>
<PRE>
void <B>error</B>(java.lang.String message,
java.lang.Exception e,
int errorCode)</PRE>
<DL>
<DD>Equivalent to the <A HREF="../../../../org/apache/log4j/spi/ErrorHandler.html#error(java.lang.String, java.lang.Exception, int, org.apache.log4j.spi.LoggingEvent)"><CODE>error(String, Exception, int,
LoggingEvent event)</CODE></A> with the the event parameteter set to
<code>null</code>.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="error(java.lang.String)"><!-- --></A><H3>
error</H3>
<PRE>
void <B>error</B>(java.lang.String message)</PRE>
<DL>
<DD>This method is normally used to just print the error message
passed as a parameter.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
</DL>
</DD>
</DL>
<HR>
<A NAME="error(java.lang.String, java.lang.Exception, int, org.apache.log4j.spi.LoggingEvent)"><!-- --></A><H3>
error</H3>
<PRE>
void <B>error</B>(java.lang.String message,
java.lang.Exception e,
int errorCode,
<A HREF="../../../../org/apache/log4j/spi/LoggingEvent.html" title="class in org.apache.log4j.spi">LoggingEvent</A> event)</PRE>
<DL>
<DD>This method is invoked to handle the error.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>message</CODE> - The message assoicated with the error.<DD><CODE>e</CODE> - The Exption that was thrown when the error occured.<DD><CODE>errorCode</CODE> - The error code associated with the error.<DD><CODE>event</CODE> - The logging event that the failing appender is asked
to log.<DT><B>Since:</B></DT>
<DD>1.2</DD>
</DL>
</DD>
</DL>
<HR>
<A NAME="setAppender(org.apache.log4j.Appender)"><!-- --></A><H3>
setAppender</H3>
<PRE>
void <B>setAppender</B>(<A HREF="../../../../org/apache/log4j/Appender.html" title="interface in org.apache.log4j">Appender</A> appender)</PRE>
<DL>
<DD>Set the appender for which errors are handled. This method is
usually called when the error handler is configured.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Since:</B></DT>
<DD>1.2</DD>
</DL>
</DD>
</DL>
<HR>
<A NAME="setBackupAppender(org.apache.log4j.Appender)"><!-- --></A><H3>
setBackupAppender</H3>
<PRE>
void <B>setBackupAppender</B>(<A HREF="../../../../org/apache/log4j/Appender.html" title="interface in org.apache.log4j">Appender</A> appender)</PRE>
<DL>
<DD>Set the appender to falkback upon in case of failure.
<P>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Since:</B></DT>
<DD>1.2</DD>
</DL>
</DD>
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