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<title>org.apache.log4j.chainsaw (Log4j Version 1.2.17)</title>
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<h1 title="Package" class="title">Package org.apache.log4j.chainsaw</h1>
<div class="docSummary">
<div class="block">Chainsaw is a GUI log viewer and filter for the log4j
package.</div>
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<p>See: <a href="#package.description">Description</a></p>
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<table class="typeSummary" border="0" cellpadding="3" cellspacing="0" summary="Class Summary table, listing classes, and an explanation">
<caption><span>Class Summary</span><span class="tabEnd"> </span></caption>
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<th class="colFirst" scope="col">Class</th>
<th class="colLast" scope="col">Description</th>
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<td class="colFirst"><a href="../../../../org/apache/log4j/chainsaw/Main.html" title="class in org.apache.log4j.chainsaw">Main</a></td>
<td class="colLast">
<div class="block">The main application.</div>
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<h2 title="Package org.apache.log4j.chainsaw Description">Package org.apache.log4j.chainsaw Description</h2>
<div class="block"><P>Chainsaw is a GUI log viewer and filter for the log4j
package. By default it listens for <a
href="../spi/LoggingEvent.html">LoggingEvent</A> objects sent using
the <A href="../net/SocketAppender.html">SocketAppender</A> and
displays them in a table. The events can be filtered based on:</P>
<UL>
<LI>Level </li>
<LI>Thread name</li>
<LI>Logger</li>
<LI>Message</li>
<LI>NDC</LI>
</UL>
<P>All the details for each event can be displayed by selecting
the event in the table.</P>
<P>Chainsaw also supports loading a events logged to a file using
the <A href="../xml/XMLLayout.html">XMLLayout</A> format. This
is great for analysing log files, and means you do not need to
keep Chainsaw running continously. It is easy to add support
for loading events from other sources like JDBC.</P>
<P>A picture is worth a thousand words: </P>
<P align=center><A
href="doc-files/screen_01.png"><IMG
height="50%" alt="Screen shot of chainsaw"
src="doc-files/screen_01.png"
width="50%"></A>.</P>
<P>Finally, why is it called chainsaw?
Because it cuts your log (file) down to size. :-)
</P>
<H2>Requirements</H2>
<P>Chainsaw is based on the Swing API which requires JDK 1.2 or later.</P>
<H2>Running chainsaw</H2>
<H3>Setup</H3>
<P>You need to include the <code>log4j.jar</code> in the classpath.
<H3>Usage</H3>
<P>The command line usage is:</P>
<PRE> java -D<property>=<value> org.apache.log4j.chainsaw.Main </PRE>
<P>The default behaviour of chainsaw can be changed by setting system properties
using the <CODE>-D<property>=<value></CODE> arguments to java. The
following table describes what properties can be set:</P>
<TABLE cellSpacing=0 cellPadding=2 border=1>
<TR>
<TD vAlign=top><B>Property</B></TD>
<TD vAlign=top><B>Description</B></TD></TR>
<TR>
<TD vAlign=top>chainsaw.port</TD>
<TD vAlign=top>Indicates which port to listen for connections on. Defaults
to <SPAN class=default>"4445"</SPAN>.
</TD>
</TR>
</TBODY>
</TABLE>
<H2>Configuring Log4J</H2>
<P>You will need to configure log4j to send logging events to
Chainsaw. Here is a sample <CODE>log4j.properties</CODE> file
for sending logging events to Chainsaw.</P>
<PRE>
log4j.rootLogger=DEBUG, CHAINSAW_CLIENT
log4j.appender.CHAINSAW_CLIENT=org.apache.log4j.net.SocketAppender
log4j.appender.CHAINSAW_CLIENT.RemoteHost=localhost
log4j.appender.CHAINSAW_CLIENT.Port=4445
log4j.appender.CHAINSAW_CLIENT.LocationInfo=true
</PRE></div>
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<div class="aboutLanguage"><b>Log4j 1.2.17</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. --></div>
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