When does Play load application.conf? - scala

Question

Is application.conf already loaded when the code in Global.scala is executed? I'm asking because I've tried to read some configuration items from Global.scala and I always get None. Is there any workaround?

Answer 1

In Java it's available beforeStart(Application app) already
public class Global extends GlobalSettings {
public void beforeStart(Application app) {
String secret = Play.application().configuration().getString("application.secret");
play.Logger.debug("Before start secret is: " + secret);
super.beforeStart(app);
}
}
As it's required to i.e. configuring DB connection, most probably Scala works the same way (can't check)

Answer 2

Here below is how to read the configuration just after it has been loaded but before the application actually starts:
import play.api.{Configuration, Mode}
import play.api.GlobalSettings
import java.io.File
import utils.apidocs.InfoHelper
object Global extends GlobalSettings {
override def onLoadConfig(
config: Configuration,
path: File, classloader:
ClassLoader,
mode: Mode.Mode): Configuration = {
InfoHelper.loadApiInfo(config)
config
}
}
And here below, just for your info, is the source of InfoHelper.loadApiInfo – it just loads API info for Swagger UI:
package utils.apidocs
import play.api.Configuration
import com.wordnik.swagger.config._
import com.wordnik.swagger.model._
object InfoHelper {
def loadApiInfo(config: Configuration) = {
config.getString("application.name").map { appName =>
config.getString("application.domain").map { appDomain =>
config.getString("application.emails.apiteam").map { contact =>
val apiInfo = ApiInfo(
title = s"$appName API",
description = s"""
Fantastic application that makes you smile. You can find our
more about $appName at $appDomain.
""",
termsOfServiceUrl = s"//$appDomain/terms",
contact = contact,
license = s"$appName Subscription and Services Agreement",
licenseUrl = s"//$appDomain/license"
)
ConfigFactory.config.info = Some(apiInfo)
}}}
}
}
I hope it helps.