Properties

Koin can handle properties from environment or external property file, to help you inject values into your definitions.

Loading properties at start

You can load several type of properties at start:

environment properties - load system properties
koin.properties file - load properties from /src/main/resources/koin.properties file
"extra" start properties - map of values passed at startKoin function

Be sure to load properties at Koin start:

startKoin {
    // Load properties from the default location
    // (i.e. `/src/main/resources/koin.properties`)
    fileProperties()
}

In a Koin module, you can get a property by its key:

in /src/main/resoucres/koin.properties file

// Key - value
server_url=http://service_url

Just load it with getProperty function:

val myModule = module {

    // use the "server_url" key to retrieve its value
    single { MyService(getProperty("server_url")) }
}