typesafe.config - external config file is not working

Question

I have application.conf file on my classpath, included in the jar:

{    
  db.class : "org.h2.Driver"
  db.url : "jdbc:h2:~/database.db"
  db.username : sa
  db.password : ""
}

And I want my app to use external .conf file, which is /home/user/cfg/app.conf:

{    
  db.class : "org.h2.Driver"
  db.url : "jdbc:h2:~/prod.db"
  db.username : someusername
  db.password : somepassword
}

I launch my app with -Dconfig.file option:

java -Dconfig.file="/home/user/cfg/app.conf" -jar application.jar

But ConfigFactory.load() still loads application.conf from classpath, ignoring the external file.

What am I doing wrong?

Answer 1

Did you happen to read through the Standard behavior of typesafe config at Standard behavior ?

Perhaps you could try their suggestion.

It says "These system properties specify a replacement for application.{conf,json,properties}, not an addition. They only affect apps using the default ConfigFactory.load() configuration. In the replacement config file, you can use include "application" to include the original default config file; after the include statement you could go on to override certain settings."