How can I implement log4j logging to an existing J2EE Struts web application?

Posted by Ruepen on Stack Overflow See other posts from Stack Overflow or by Ruepen
Published on 2010-05-06T13:25:12Z Indexed on 2010/05/06 13:28 UTC
Read the original article Hit count: 126

Filed under:

java

|

log4j

|

struts

I have recently inherited a J2EE Struts web app that was written back in 2002. There is no logging in the application other than the odd System.out.println().
I have added log4j logging so that I can write out some info to the console, but I'm concerned on how best to approach this. Any suggestions, tips, best practices would be welcome as I don't want to spend too much time adding logging to every method or class (or trying to find what places where logging would be best - ie. bad code blocks/defects).
My current approach is to just add some logging to the few classes that I have been looking at to understand the code, but are there a few key places where I can add logging to maximize my use of adding log4j?

© Stack Overflow or respective owner

Related posts about java

Tomcat 6: Access Control Exception?

as seen on Server Fault - Search for 'Server Fault'
I'm trying to setup a tomcat6 server, and I'm trying to match another setup someone else established. However, my deployment (default Ubuntu install) uses a policy.d/ directory structure, and the established server just uses a catalina.policy file. I've tried setting every entry in policy.d to match… >>> More
Problem in creation MDB Queue connection at Jboss StartUp

as seen on Stack Overflow - Search for 'Stack Overflow'
I am not able to create a Queue connection in JBOSS4.2.3GA Version & Java1.5, as I am using MDB as per the below details. I am putting this MDB in a jar file(named utsJar.jar) and copied it in deploy folder of JBOSS, In the test env. this MDB works well but in another env. [ env settings and… >>> More
failing to establish connection between Postgres db and gwt

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I am using Postgres and gwt 2.0 for one of my applications. I am facing problem connecting to the database. When I try to connect it gives "ClassNotFoundException". Here is what I get when I try to connect to database: java.lang.ClassNotFoundException: org.postgresql.Driver at java.net… >>> More
failing to establish connection between postgre db and gwt

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, For i am using postgre and gwt 2.0 for one of my applications. I am facing problem connecting to the database. When i try to connect it gives "ClassNotFoundException". Here is what i get when i try to connect to database: java.lang.ClassNotFoundException: org.postgresql.Driver at java.net… >>> More
Migration and deployement problems JBoss 4.2.2.GA to JBoss 6.0.0.M2

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I'm trying to migrate an application running on JBoss 4.2.2.GA to JBoss 6.0.0.M2 I give you some log to explain my problem : boot.log : 2010-03-16 09:59:29,406 ERROR [org.jboss.system.server.profileservice.ProfileServiceBootstrap] (Thread-2) Failed to load profile: Summary of incomplete deployments… >>> More

Related posts about log4j

log4j floods my console

as seen on Stack Overflow - Search for 'Stack Overflow'
This is the log4j.properties that i have in my app log4j.rootLogger=B C log4j.logger.A=INFO, A1 log4j.debug=false log4j.appender.A1=org.apache.log4j.ConsoleAppender log4j.appender.A1.layout=org.apache.log4j.PatternLayout log4j.appender.A1.layout.ConversionPattern=%d [%t] %-5p %C - %m%n log4j.logger… >>> More
Production settings file for log4j?

as seen on Stack Overflow - Search for 'Stack Overflow'
Here is my current log4j settings file. Are these settings ideal for production use or is there something I should remove/tweak or change? I ask because I was getting all my threads being hung due to log4j blocking. I checked my open file descriptors I was only using 113. # ***** Set root logger… >>> More
log4j additivity, category logging level and appender threshold

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm having troubles understanding the relation between additivity, category logging level and appender threshold... here's the scenario (my log4j.properties file): log4j.category.GeneralPurpose.classTypes=INFO, webAppLogger log4j.additivity.GeneralPurpose.classTypes=true log4j.category.GeneralPurpose=ERROR… >>> More
Translate Basic Config.groovy log4j DSL to external log4j.properties

as seen on Stack Overflow - Search for 'Stack Overflow'
The following is a basic log4j configuration inside Config.groovy using the log4j DSL with Grails 1.2, it works as expected (log all errors to the given file): log4j = { appenders { file name:'file', file:"c:/error.log" } error 'grails.app' root { error 'file' … >>> More
log4j prints all levels

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello, I've got log4j configured on my Java project with the following log4j.properties: log4j.rootLogger=WARNING, X log4j.appender.X=org.apache.log4j.ConsoleAppender log4j.appender.X.layout=org.apache.log4j.PatternLayout log4j.appender.X.layout.ConversionPattern=%p %m %n log4j.logger.org.hibernate… >>> More