Get props from OS system environment, just like OBP API

Objective:

(The same as OBP API https://github.com/OpenBankProject/OBP-API/issues/1208 )

Make container-like deployments easier by reading props from sys.env, we want to avoid rewriting the props file and repacking the war file like this: https://github.com/chrisjsimpson/obp-kubernetes/issues/2#issuecomment-460495439 (<< this is to be avoided)

For docker-like environments, it is helpful instead to read runtime settings from the operating system environment vars, because we can inject these at container runtime.

pseudo Logic

Load props from system environment (sys.env) https://www.scala-lang.org/api/2.9.3/scala/sys/package.html
Fallback to read from props file

pseudo code

  def getPropsValue(nameOfProperty: String): Box[String] = {
    # Replace "." with "_" (environment vars cannot include ".")
    brandSpecificPropertyName = brandSpecificPropertyName.replace('.', '_')
    # Convert to upper case
    brandSpecificPropertyName = brandSpecificPropertyName.toUpperCase()
    if (sys.env.get(brandSpecificPropertyName)) {

    } else {
      ..... load from props file as normal
    }
  }

Gotcha

Environment variables will be upper case (s.toUpperCase())
Environment variables cannot contain a dot ("."), therefore:
- oauth_1.hostname becomes OAUTH_1_HOSTNAME
- api_hostname becomes API_HOSTNAME

OpenBankProject / API-Explorer

Get props from OS system environment, just like OBP API #59

Objective:

pseudo Logic

pseudo code

Gotcha