CODEWITHSUNDEEP
sbttypesafetypesafe-config
Eric Kolotyluk
Eric Kolotyluk

Reputation: 2243

How do you override Typesafe Config settings?

In my application.conf file I have something like

platform3.operational.state = "development"

I run my service with

sbt "project p3-s-sink" "run -Dplatform3.operational.state=test"

But the configuration property is still "development"

How do you override typesafe-config settings?

Upvotes: 2

Views: 3418

Answers (2)

pme
pme

Reputation: 14803

Maybe this blog helps you:

Unfortunately sbt run doesn’t support java system properties so you can’t tweak settings with the command line when running sbt. The sbt-revolver plugin, which allows you to run your app in a forked JVM, does allow you to pass java arguments using the command line.

http://blog.michaelhamrah.com/2014/02/leveraging-typesafes-config-library-across-environments/

Upvotes: 2

nadavwr
nadavwr

Reputation: 1830

From JavaDoc of ConfigFactory.systemProperties() [ConfigFactory.java]:

 * Gets a <code>Config</code> containing the system properties from
 * {@link java.lang.System#getProperties()}, parsed and converted as with
 * {@link #parseProperties}.
 * <p>
 * This method can return a global immutable singleton, so it's preferred
 * over parsing system properties yourself.
 * <p>
 * {@link #load} will include the system properties as overrides already, as
 * will {@link #defaultReference} and {@link #defaultOverrides}.
 *
 * <p>
 * Because this returns a singleton, it will not notice changes to system
 * properties made after the first time this method is called. Use
 * {@link #invalidateCaches()} to force the singleton to reload if you
 * modify system properties.
 *
 * @return system properties parsed into a <code>Config</code>

Note the middle paragraph: "load will include the system properties as override already, as will defaultReference and defaultOverrides".

Does it work as expected when you execute directly?

Upvotes: 1

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