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Posted to log4j-user@logging.apache.org by Madhava Reddy <Ma...@icon-scm.com> on 2003/01/25 18:06:31 UTC
Help for starter..
Hi,
I'm fairly new to this Log4j.
I have several questions.
I am using Tomcat. I have jsps and java files. I planned to use 3 logs. I
want to maintain Logs to Track Login Time, Logout Time in one log. Second
log tracks Critical Requsts of all users. Third log tracks Exceptions and
errors for all users.
So, I am using DailyRollingFileAppender for these 3 logs. I am configuring
logger by an xml file.
Here is Loggin Track xml file. Login.xml
----------------
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
<appender name="DailyLog"
class="org.apache.log4j.DailyRollingFileAppender">
<param name="File"
value="D:/tomcat4110/logs/smileLogs/LoginTrack.log"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d %-5p
%m%n"/>
</layout>
</appender>
<root>
<priority value="debug"/>
<appender-ref ref="DailyLog"/>
</root>
</log4j:configuration>
---------------
and Request Track xml File
----------
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
<appender name="Request"
class="org.apache.log4j.DailyRollingFileAppender">
<param name="File"
value="D:/tomcat4110/logs/smileLogs/RequestTrack.log"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d %-5p
%m%n"/>
</layout>
</appender>
<root>
<priority value="debug"/>
<appender-ref ref="Request"/>
</root>
</log4j:configuration>
---------
I create loggers in my java, like
To get Login Track logger
org.apache.log4j.xml.DOMConfigurator.configure("Login.xml");
Logger loginLog = org.apache.log4j.Logger.getLogger("Login");
and to get Request Logger
org.apache.log4j.xml.DOMConfigurator.configure("Request.xml");
Logger requestLog = org.apache.log4j.Logger.getLogger("Request");
--------------
When I use these logs like
loginLog.debug("Testing Login Track ");
requestLog.debug(" Testing Request Track" );
---
I'm getting two log files namely LoginTrack.log and RequestTrack.log. But,
LoginTrack is empty and RequestTrack.log contains,
2003-01-25 17:54:57,486 DEBUG Testing Login Track
2003-01-25 17:54:57,486 DEBUG Testing Request Log
which means I am getting the same reference for the two loggers. What
mistake I've done? How to get 2 different instances?
------------
I receive the name of Logger as argument in Java, if I have created this
log, return existing, else I will create new logger and return. I will
maintain loggers mapping looger name -- logger.
Please point out any mistakes or wrong apprach in the above approach. Will
this approach creates some problems at some later poing of time?
---
One more question,
Imagine, I have successfully running tomcat with these loggers. After some
days, the loggers size may become critical. I observed that, I can not
delete a log file with out stopping tomcat.. How to delete old log files?
I have more questions too.. but those are more related to Tomcat than Log4j.
I will share those later.
thanks for your advice..
Madhav
RE: Help for starter..
Posted by Rich Bagley <rb...@hbs.edu>.
Hi,
I think the second xml is overwriting the appender attached to root. I'd
use one xml file, with multiple appenders and loggers, something like this:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
<appender name="DailyLog"
class="org.apache.log4j.DailyRollingFileAppender">
<param name="File"
value="logs/multiple/LoginTrack.log"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d %-5p
%m%n"/>
</layout>
</appender>
<appender name="Request"
class="org.apache.log4j.DailyRollingFileAppender">
<param name="File"
value="logs/multiple/RequestTrack.log"/>
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d %-5p
%m%n"/>
</layout>
</appender>
<logger name="logging.request">
<level value="debug"/>
<appender-ref ref="Request"/>
</logger>
<logger name="logging.dailyLog">
<level value="debug"/>
<appender-ref ref="DailyLog"/>
</logger>
<root>
<priority value="debug"/>
</root>
</log4j:configuration>
In your code:
// Initialize the config
//
DOMConfigurator.configure( "java/samples/xml/multiple/multi.xml" );
// Get the loggers
//
Logger requestLogger = Logger.getLogger( "logging.request" );
Logger dailyLogger = Logger.getLogger( "logging.dailyLog" );
// Write to the logs
//
requestLogger.debug( "request message1: DEBUG" );
requestLogger.info( "request message2: INFO" );
dailyLogger.debug( "dailyLog message1: DEBUG" );
dailyLogger.info( "dailyLog message2: INFO" );
You'll get two log files.
I've attached the xml file and a test class.
Hope this helps
-Rich
>> -----Original Message-----
>> From: Madhava Reddy [mailto:Madhava_Reddy@icon-scm.com]
>> Sent: Saturday, January 25, 2003 12:07 PM
>> To: 'log4j-user@jakarta.apache.org'
>> Subject: Help for starter..
>>
>>
>> Hi,
>>
>> I'm fairly new to this Log4j.
>>
>> I have several questions.
>>
>> I am using Tomcat. I have jsps and java files. I planned to use 3 logs. I
>> want to maintain Logs to Track Login Time, Logout Time in one log. Second
>> log tracks Critical Requsts of all users. Third log tracks Exceptions and
>> errors for all users.
>>
>> So, I am using DailyRollingFileAppender for these 3 logs. I am
>> configuring
>> logger by an xml file.
>>
>> Here is Loggin Track xml file. Login.xml
>> ----------------
>> <?xml version="1.0" encoding="UTF-8" ?>
>> <!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
>>
>> <log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
>>
>> <appender name="DailyLog"
>> class="org.apache.log4j.DailyRollingFileAppender">
>> <param name="File"
>> value="D:/tomcat4110/logs/smileLogs/LoginTrack.log"/>
>> <layout class="org.apache.log4j.PatternLayout">
>> <param name="ConversionPattern" value="%d %-5p
>> %m%n"/>
>> </layout>
>> </appender>
>>
>> <root>
>> <priority value="debug"/>
>> <appender-ref ref="DailyLog"/>
>> </root>
>> </log4j:configuration>
>> ---------------
>>
>> and Request Track xml File
>>
>> ----------
>> <?xml version="1.0" encoding="UTF-8" ?>
>> <!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
>>
>> <log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
>>
>> <appender name="Request"
>> class="org.apache.log4j.DailyRollingFileAppender">
>> <param name="File"
>> value="D:/tomcat4110/logs/smileLogs/RequestTrack.log"/>
>> <layout class="org.apache.log4j.PatternLayout">
>> <param name="ConversionPattern" value="%d %-5p
>> %m%n"/>
>> </layout>
>> </appender>
>>
>> <root>
>> <priority value="debug"/>
>> <appender-ref ref="Request"/>
>> </root>
>> </log4j:configuration>
>> ---------
>>
>> I create loggers in my java, like
>>
>> To get Login Track logger
>>
>> org.apache.log4j.xml.DOMConfigurator.configure("Login.xml");
>>
>> Logger loginLog = org.apache.log4j.Logger.getLogger("Login");
>>
>> and to get Request Logger
>>
>> org.apache.log4j.xml.DOMConfigurator.configure("Request.xml");
>>
>> Logger requestLog = org.apache.log4j.Logger.getLogger("Request");
>>
>> --------------
>>
>> When I use these logs like
>>
>> loginLog.debug("Testing Login Track ");
>> requestLog.debug(" Testing Request Track" );
>>
>> ---
>>
>> I'm getting two log files namely LoginTrack.log and
>> RequestTrack.log. But,
>> LoginTrack is empty and RequestTrack.log contains,
>>
>> 2003-01-25 17:54:57,486 DEBUG Testing Login Track
>> 2003-01-25 17:54:57,486 DEBUG Testing Request Log
>>
>> which means I am getting the same reference for the two loggers. What
>> mistake I've done? How to get 2 different instances?
>>
>> ------------
>> I receive the name of Logger as argument in Java, if I have created this
>> log, return existing, else I will create new logger and return. I will
>> maintain loggers mapping looger name -- logger.
>>
>> Please point out any mistakes or wrong apprach in the above
>> approach. Will
>> this approach creates some problems at some later poing of time?
>>
>> ---
>>
>> One more question,
>>
>> Imagine, I have successfully running tomcat with these loggers.
>> After some
>> days, the loggers size may become critical. I observed that, I can not
>> delete a log file with out stopping tomcat.. How to delete old
>> log files?
>>
>> I have more questions too.. but those are more related to Tomcat
>> than Log4j.
>> I will share those later.
>>
>> thanks for your advice..
>>
>> Madhav
>>
>>