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scalatypesafe-config

Typesafe Config does not take System properties that were set in runtime

I have a core library that sets its configuration as system properties.

mail.from = [email protected]

I wanted to override my config with them, like:

my.mail.from = "[email protected]"
my.mail.from = ${?mail.from}

This works in unit tests. In my Play (2.6) application it does not.

PropertiesConfiguration.init() // this inits the system properties
info("mail.from: " + sys.props.get("mail.from")) // >> '[email protected]' as expected   
val config = ConfigFactory.load()
info("my.mail.from: " + config.getString("my.mail.from")) // >> '[email protected]' instead of '[email protected]'

Is this not possible or do I miss something?

Solution

  • Try invalidating any cached configurations in order to pick up changes to system properties:

    PropertiesConfiguration.init()
info("mail.from: " + sys.props.get("mail.from"))

ConfigFactory.invalidateCaches()

val config = ConfigFactory.load()
info("my.mail.from: " + config.getString("my.mail.from"))