Play Framework 2.1 Java/Eclipse: Auto-Reload not working

The Problem/s:

• Views are being compiled but hitting refresh in a browser won't show the changes without restarting the server manually.
• Changes to controllers compile automatically using ~run but only a manual server restart will update the content on the server.
• Changes to routes under conf are only shown after manually restarting the server.
  
  

Background:

• running on OSX 10.8.3
• using Eclipse Juno 4.2.2
• Server is launched using play ~run
• Only restarting the server will show changes to views, controllers, routes
  
  

To be able to make changes without having to restart the server each time I tried (without success):

• in the console: clean -> eclipse -> ~run
• in the console: clean -> compile -> ~run
• shutdown/restart the computer
• Tick Refresh using native hooks or polling -> remove classes_managed from Referenced Libraries and add it manually
  
  

Questions:

• How can the Auto-Reload functionality be restored?
• How can this problem be solved on IDEs besides Eclipse?

Further information:

• Playframework reload not working Mac OSX
• Auto-reloading with Play framework on a network filesystem

Both of them point to JNotify as the cause for auto-reloading not to work. One of the answers (not enough rep to write a comment) mentions how one could "hack Play framework's sbt plugin to make the PlayReloader trait behave as if JNotify wasn't available." How could one achieve this?

The following got Play's auto-reload to working with Eclipse:

1. In Eclipse Preferences go to General → Workspace. Uncheck Build automatically.
2. Restart OS X.

For whatever reason, I had to restart OS X to get akim's suggestion to take hold.