Where is the correct location to put Log4j properties in an Eclipse project

Question

Where in my Eclipse project should I add the log4j properties file so that it will work as intended

User · Answer

This question is already answered here  The classpath never includes specific files  It includes directories and jar files  So  put that file in a directory that is in your classpath      Log4j properties aren t  normally  used in developing apps  unless you re debugging Eclipse itself    So what you really want to to build the executable Java app  Application  WAR  EAR or whatever  and include the Log4j properties in the runtime classpath

User · Answer

In general I put it in a special folder  res  or  resources as already said  but after for the web application  I copy the log4j properties with the ant task to the WEB-INF classes directory  It is the same like letting the file at the root of the src  folder but generally  I prefer to see it in a dedicated folder   With Maven  the usual place to put is in the folder src main resources as answered in this other post  All resources there will go to your build in the root classpath  e g  target classes    If you want a powerful logger  you can have also a look to slf4j library which is a logger facade and can use the log4j implementation behind

User · Answer

Add the log4j properties file to the runtime class path of the project  Some people add this to the root of the source tree  so that it gets copied to the root of the compiled classes    Edit  If your project is a maven project  you can put the log4j properties in the src main resources folder  and the src test resources for your unit tests    If you have multiple environments  for example development and production   want different logging for each environment  and want to deploy the same jar  or war  or ear  file to each environment  as in one build for all environments  then store the log4j properties file outside of the jar file and put it in the class path for each environment  configurable by environment   Historically  I would include some known directory in each environment in the classpath and deploy environment specific stuff there  For example   tomcat user localclasspath where  tomcat user is the home directory of the user that will be running the tomcat instance to which my war file will be deployed

User · Answer

You do not want to have the log4j properties packaged with your project deployable -- that is a bad idea  as other posters have mentioned   Find the root Tomcat installation that Eclipse is pointing to when it runs your application  and add the log4j properties file in the proper place there  For Tomcat 7  the right place is    TOMCAT HOME  lib

User · Answer

The safest way IMO is to point at the file in your run debug config  -Dlog4j configuration file mylogging properties     Be aware  when using the eclipse launch configurations the specification of the file  protocol is mandatory   In this way the logger will not catch any logging properties that come before in the classpath nor the default one in the JDK   Also  consider actually use the log4j xml which has a richer expression syntax and will allow more things  log4j xml tahe precedence over log4j properties

User · Answer

The best way is to create special source folder named resources and use it for all resource including log4j properties  So  just put it there    On the Java Resources folder that was automatically created by the Dynamic Web Project  right click and add a new Source Folder and name it  resources    Files here will then be exported to the war file to the classes directory

User · Answer

I m finding out that the location of the log4j properties file depends on the type of Eclipse project   Specifically  for an Eclipse Dynamic Web Project  most of the answers that involve adding the log4j properties to the war file do not actually add the properties file in the correct location  especially for Tomcat Apache   Here is some of my research and my solution to the issue  again specifically for a Dynamic Web Project running on Tomcat Apache 6 0    Please refer to this article around how Tomcat will load classes   It s different than the  normal class loader for Java    https   www mulesoft com tcat tomcat-classpath   Note that it only looks in two places in the war file  WEB-INF classes and WEB-INF lib  Note that with a Dynamic Web Project  it is not wise to store your  properties file in the build    classes directory  as this directory is wiped whenever you clean-build your project  Tomcat does not handle  property files in the WEB-INF lib location  You cannot store the log4j properties file in the src directory  as Eclipse abstracts that directory away from your view  The one way I have found to resolve this is to alter the build and add an additional directory that will eventually load into the WEB-INF classes directory in the war file   Specifically        1  Right click your project in the project explorer  select  New -  Folder    You can name the folder anything  but the standard in this case is  resources    The new folder should appear at the root level of your project    2  Move the log4j properties file into this new folder      3  Right click the project again  and select  Build-Path -  Configure Build Path    Select the  Sources  tab   Click the  Add Folder  button   Browse to find your new folder you created in step  1  above   Select  OK       4  Once back to the eclipse Project Explorer view  note that the folder has now moved to the  Java Resources  area  ie it s no longer at the root due to eclipse presentation abstraction     5  Clean build your project    6  To validate that the  properties file now exists in WEB-INF classes in your war file  export a war file to an easy location  right click Project -  Export -  War file  and checkout the contents   Note that the log4j properties file now appears in the WEB-INF classes     7  Promote your project to Tomcat Apache and note that log4j now works   Now that log4j works  start logging  solve world problems  take some time off  and enjoy a tasty adult beverage

User · Answer

you can add it any where you want  when you run your project  configure the classpath and add the location of the log4j properties files by clicking on   Run- Run Configuration -   classpath tab  -  click on user Entries -  Advanced -  Select Add Folder -  select the location of your log4j properties file  and then -  OK -  run  and it should get loaded

User · Answer

If you have a library and you want to append the log4j    Create a folder named  resources  in your projet  Create a  properties file named log4j Set properties in log4j properties file Push right button in the project and go to properties- Java Build Path and  finally  go to the  Source  tab  Push Add folder and search the  resources  folder created in step 1  Finish     I have assumed that you have the log4j library added    PD  Sorry for my english

User · Answer

Put log4j properties in the runtime classpath   This forum shows some posts about possible ways to do it

[java] Where is the correct location to put Log4j.properties in an Eclipse project?

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