Restart unfiltered server on keypress

Question

I often run a dispatcher server in sbt ~run.

  unfiltered.netty.Http(port)
    .handler(plan)
    .run()

  Http.shutdown()

When I start up my server, it says:

Embedded server running on port 8080. Press any key to stop.

However, only ENTER will stop the server. Unfortunately, ENTER also stops sbt. How can I set up unfiltered so that it actually stops on any key within sbt? I would like pressing a key to stop the server and cause sbt to re-compile and re-run the application.

Answer 1

You can do continuous hot reloading using sbt-revolver and JRebel. There's a free license of JRebel for Scala users.

1. Start sbt shell.
2. reStart starts a forked JVM that's exit trapped.
3. If you installed JRebel correctly, compiled classes from ~products would get loaded into the forked JVM.

See Hot Reloading.