property file

[hanfak]

environment extraction
docker/kubernetes issues later on

[ryantaplin]

So I found out today that you can access environment variables using System.getenv().

System.getenv("ENVIRONMENT");

You can either set your systems environment variables to use this 'variable' or set it up in IntelliJ by going to Run -> Edit Configurations -> Environment variables (+).

I have had trouble trying to set up docker on my windows PC so I didn't manage to check it working with docker however I read somewhere mentioning that you can set up environment variables in the docker image by defining them in the docker file. We can investigate this on Wednesday.

I'm not sure if you will always return a default environment if the variable doesn't exist however I decided to throw a null pointer exception.

public static String getSystemEnvironment() {
            return getEnvironmentVariable("ENVIRONMENT"); //extract environmentVariable out?
    }

private static String getEnvironmentVariable(String variable) {
        String out = System.getenv(variable);

        if (out == null)
            throw new NullPointerException(String.format("The environment variable '%s' was not found on this system.", variable));

        return out;
    }