How to use log4j

[nadeau]

I want to configure spring logging using log4j.

I want to send all Spring logging to a file and we already use log4j in our application.

How do you do such a thing?



thank you.

[irbouho]

petclinic sample from Spring Distribution uses Log4jConfigListener to configure logging.

you may review the following files
- web.xml: for Log4jConfigListener configuration (it is however disable in the sample)
- log4j.properties: shows an example of logging to a file

[fmourioux]

Or put a log4j.xml like this to your classpath :

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j&#58;configuration SYSTEM "log4j.dtd">

<log4j&#58;configuration xmlns&#58;log4j="http&#58;//jakarta.apache.org/log4j/">
    <appender name="CONSOLE" class="org.apache.log4j.ConsoleAppender">
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern"
                value="%p - %C&#123;1&#125;.%M&#40;%L&#41; | %m%n"/>
        </layout>
    </appender>

    <logger name="org.apache">
        <level value="WARN"/>
    </logger>

    <logger name="servletunit.struts">
        <level value="INFO"/>
    </logger>
    
    <logger name="net.sf.hibernate">
        <level value="WARN"/>
    </logger>

    <logger name="com.opensymphony.oscache">
        <level value="WARN"/>
    </logger>

    <logger name="org.springframework">
        <level value="INFO"/>
    </logger>
    
    <root>
        <level value="ERROR"/>
        <appender-ref ref="CONSOLE"/>
    </root>
</log4j&#58;configuration>

In this example, u trace all the "info" trace of springframework

Hope it will help u,

Fabien.

[nadeau]

I found a solution to my problem.

The problem is cause by to use of commons-logging and Websphere. Websphere use JCL internally and an application have to override websphere's configuration.

Here a link to a complete solution to the problem.


http://www-1.ibm.com/support/docview...id=swg27004610

[rstearns01]

Excellent timing. I am having a similar problem and was going to post it on Monday. Thanks!

[tvogel]

Thanks for the link to the IBM site. I have tried both methods but neither worked for me.

Which method worked for you?
Option 2 adding org.apache.commons.logging.LogFactory in the META-INF/services directory or
Option 3 commons-logging.properties with classloader set to PARENT_LAST.

[nadeau]

> Which method worked for you?
> Option 2 adding org.apache.commons.logging.LogFactory in the META-INF/services directory or
> Option 3 commons-logging.properties with classloader set to PARENT_LAST.

I tried both of these solution and only Option 2 works for me. And you have to put the file org.apache.commons.logging.LogFactory and the services directory in a WEB application.

At first I tried to use an ejb application with no success. In your web application it works like a charm and your application (EAR) will use the JCL setting. Not only the web module as documented in the ibm paper.