Pass argument to log4j file

Question

I have heard that a .properties file in java can accept String arguments ({0}, {1}, and so on...)

Can you please provide an example to show how to use these kind of arguments in the log4j.properties file?

Also, please help with a sample code showing how to pass the argument to the file while loading the file.

Links to any useful articles will also help

Like this ?? http://stackoverflow.com/questions/778933/log4j-configuration-via-jvm-arguments — Suresh Atta, Jul 03 '13 at 07:29

score 0 · Answer 1 · answered Jul 03 '13 at 07:55

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Sample properties in log4j.properties

log4j.appender.file.File=${LOG_FILE_PATH}/${LOG_FILE_NAME}

Bear in mind that log4j will try to find log4j.properties and load automatically when initialised. Therefore, I can only think of passing the argument as JVM arguments.

In VM Arguments:

-DLOG_FILE_PATH=C:\log -DLOG_FILE_NAME=apps.log

answered Jul 03 '13 at 07:55

Tatang

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is there any way i can pass these parameters programmatically? rather than setting them as properties via the command line? – Pooja Thaker Jul 19 '13 at 07:06

score 0 · Answer 2 · answered Jan 14 '19 at 22:16

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In log4j file:

log4j.appender.file.File=${log4jjava}

In your java code(the class that init log4j):

System.setProperty("log4jjava", PATH_YOU_WANT_TO_SET);
//then load your property file

answered Jan 14 '19 at 22:16

wwjih123

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Pass argument to log4j file

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