How can I move log4j.properties outside of the jar file?

I am creating a file jar

with gradle, my application is using log4j

. Mine log4j.properties

was originally embedded in a jar file. I moved it outdoors to be able to modify it in production. I've updated the file META-INF/MANIFEST.MF

embedded in the jar file to reflect this:

Class-Path: lib/log4j-1.2.1 lib/slf4j-api-1.4.2.jar
            lib/slf4j-api-1.5.6.jar lib/slf4j-log4j12-1.5.6.jar
            lib/log4j-1.2.14.jar
            ...
            lib/log4j.properties

      

My filetree looks like this on a Windows 7 32 bit machine:

root/myapp.jar
root/lib/log4j.properties

      

I start my application with this command:

java -Dlog4j.configuration='lib\log4j.properties' -Dlog4j.debug=true -jar myapp.jar > logs/output.log

      

my logs/output.log

says log4j couldn't find its properties file:

log4j: Trying to find ['lib\log4j.properties'] using context classloader sun.misc.Launcher$AppClassLoader@17fa65e.
log4j: Trying to find ['lib\log4j.properties'] using sun.misc.Launcher$AppClassLoader@17fa65e class loader.
log4j: Trying to find ['lib\log4j.properties'] using ClassLoader.getSystemResource().
log4j: Could not find resource: ['lib\log4j.properties'].

      

I've also tried:

-Dlog4j.configuration='lib/log4j.properties'
-Dlog4j.configuration='log4j.properties'
-Dlog4j.configuration=log4j.properties

      

When I insert the file into the jar, it works:

log4j: Trying to find [log4j.properties] using context classloader sun.misc.Launcher$AppClassLoader@18385e3.
log4j: Using URL [jar:file:/C:/Users/User/Desktop/myapp/myapp.jar!/log4j.properties] for automatic log4j configuration.
log4j: Reading configuration from URL jar:file:/C:/Users/User/Desktop/myapp/myapp-2.1.9.jar!/log4j.properties
log4j: Parsing for [root] with value=[debug, A].

      

But I need this outside ... Any idea?

+3


source to share


1 answer


Try the following:

-Dlog4j.configuration=file:lib/log4j.properties

      



but I'm curious: does the class definition in the manifest actually work? Jars, yes this standard, but does it work for log4j.properties too?

+4


source







All Articles