Reading resources using new File("src/main/resources/logfile.txt") is bad

[akauppi]

I'm going to use the Akka Streams sample in our Helsinki Scala Club meetup. Unfortunately, one of the samples reads a resource using a build-time relative path. This only works in development, of course, and not in production. In fact, the current way is not using the file as a resource, at all. All of this might be misleading to Scala learners.

Unfortunately, I don't know how to fix this for real. Using a Stream instead of File changes the later iteration code.

Here is a code that is somewhere in between. Creates a File out of a resource. This is done pretty often, but is not ideal, or recommended. Better than the current way, though.

    // Note: Resources should be read using '.getResourceAsStream'. While the code shows Akka Streams, it should not
    //      teach bad (nonfunctional, in production) manners. AKa240116
    //
    //val log: InputStream = getClass.getResourceAsStream("/logfile.txt")

    // read lines from a log file
    val logFile: File = new File(getClass.getResource("/logfile.txt").toURI)