<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration PUBLIC "-//log4j/log4j Configuration//EN" "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
<appender name="FILE_APPENDER" class="org.apache.log4j.RollingFileAppender">
<param name="File" value="/tmp/server.log" />
<param name="Append" value="true" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d %-5p [%t] %C{2} (%F:%L) - %m%n" />
</layout>
</appender>
<logger name="se.msc.example.log4j.ChainsawTest">
<level value="DEBUG" />
</logger>
<root>
<level value="ERROR" />
<appender-ref ref="FILE_APPENDER" />
</root>
</log4j:configuration>
And the configuration file for Chainsaw.
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration PUBLIC "-//log4j/log4j Configuration//EN" "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/" debug="true">
<plugin name="logFileReceiver" class="org.apache.log4j.varia.LogFilePatternReceiver">
<param name="fileURL" value="file:///tmp/server.log" />
<param name="timestampFormat" value="yyyy-MM-d HH:mm:ss,SSS"/>
<param name="logFormat" value="TIMESTAMP LEVEL [THREAD] CLASS (FILE:LINE) - MESSAGE"/>
<param name="name" value="Reciever-name-in-Chainsaw" />
<param name="tailing" value="true" />
</plugin>
<root>
<level value="debug"/>
</root>
</log4j:configuration>
Before we open Chainsaw lets write a small test program, that generates some log post, so we have something to view.
package se.msc.example.log4j;
import org.apache.log4j.Logger;
import org.junit.Test;
public class ChainsawTest {
private static final Logger log = Logger.getLogger(ChainsawTest.class);
@Test
public void test() throws Exception {
log.debug("DEBUG text");
log.info("INFO text");
log.warn("WARN text");
log.error("ERROR text");
}
}
Now lets open Chainsaw. When first starting Chainsaw you are prompted to define a Receiver. Here we select our configuration file.
After selecting our Chainsaw configuration file, Chainsaw opens our log file in a new tab.
You might have already noticed the different formatting of logFormat attribute, compared with the Log4j and it is a question to me why they have done that. You can read more about the format in the LogFilePatternReceiver Javadoc.
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