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: Interface Logger
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org.apache.java.io</FONT>
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Interface Logger</H2>
<DL>
<DT><B>All Known Implementing Classes:</B> <DD><A HREF="../../../../org/apache/jserv/JServLog.html">JServLog</A>, <A HREF="../../../../org/apache/java/io/LogWriter.html">LogWriter</A></DD>
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<DT>public abstract interface <B>Logger</B></DL>
<P>
This interface represents a simple logger
(LogWriter is an implementation).
<P>
<DL>
<DT><B>Version: </B><DD>$Revision: 1.1 $ $Date: 1999/09/20 22:07:41 $</DD>
<DT><B>See Also: </B><DD><A HREF="../../../../org/apache/java/io/LogWriter.html"><CODE>LogWriter</CODE></A></DL>
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/java/io/Logger.html#flush()">flush</A></B>()</CODE>
<BR>
Flush the log.</TD>
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<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/java/io/Logger.html#isActive()">isActive</A></B>()</CODE>
<BR>
Tells if it is active.</TD>
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<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/java/io/Logger.html#isActive(java.lang.String)">isActive</A></B>(java.lang.String channel)</CODE>
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Tells if the given channel is active.</TD>
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/java/io/Logger.html#log(java.lang.String, java.lang.String)">log</A></B>(java.lang.String channel,
java.lang.String message)</CODE>
<BR>
Prints the log message on the right channel.</TD>
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../org/apache/java/io/Logger.html#log(java.lang.String, java.lang.Throwable)">log</A></B>(java.lang.String channel,
java.lang.Throwable t)</CODE>
<BR>
Prints the error message and stack trace if channel enabled.</TD>
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<A NAME="isActive()"><!-- --></A><H3>
isActive</H3>
<PRE>
public boolean <B>isActive</B>()</PRE>
<DL>
<DD>Tells if it is active.</DL>
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<A NAME="isActive(java.lang.String)"><!-- --></A><H3>
isActive</H3>
<PRE>
public boolean <B>isActive</B>(java.lang.String channel)</PRE>
<DL>
<DD>Tells if the given channel is active.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>channel</CODE> - the channel to test.</DL>
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<A NAME="log(java.lang.String, java.lang.String)"><!-- --></A><H3>
log</H3>
<PRE>
public void <B>log</B>(java.lang.String channel,
java.lang.String message)</PRE>
<DL>
<DD>Prints the log message on the right channel.
<p>
A "channel" is a virtual log that may be enabled or disabled by
setting the property "identifier".channel.???=true where ??? is the
channel identifier that must be passed with the message.
If a channel is not recognized or its property is set to false
the message is not written.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>channel</CODE> - the channel to put the message on.<DD><CODE>name</CODE> - the message to log.</DL>
</DD>
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<A NAME="log(java.lang.String, java.lang.Throwable)"><!-- --></A><H3>
log</H3>
<PRE>
public void <B>log</B>(java.lang.String channel,
java.lang.Throwable t)</PRE>
<DL>
<DD>Prints the error message and stack trace if channel enabled.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>t</CODE> - the error thrown.</DL>
</DD>
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<A NAME="flush()"><!-- --></A><H3>
flush</H3>
<PRE>
public void <B>flush</B>()</PRE>
<DL>
<DD>Flush the log.
Write any pending messages into the log media.</DL>
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