JNotify for JRuby

jruby-notify is a thin wrapper around the JNotify library, a java library that allow java application to listen to file system events, such as:

• File created
• File modified
• File renamed
• File deleted

Supported platforms

The gem is written for JRuby and uses the JNotify library that supports the following platforms:

• Windows (2000 or newer)
• Linux with INofity support (2.6.14 or newer)
• Mac OS X (10.5 or newer)

Please have a look at the platform specific notes on the JNotify page.

Installation

gem install jruby-notify

Example

require 'jruby-notify'

notify = JRubyNotify::Notify.new
notify.watch Dir.pwd do |path, file|
  puts "Detected change in: #{ File.join(path, file) }"
end

notify.run

Forecast

With the upcoming release of Java 7 there will be a more robust solution to this problem with the WatchService API. This gem will make use of this API when it'll be released.

Other solutions

There are other gems that provides almost the same functionality for MRI:

• rb-fsevent for Mac OS X only
• rb-inotify for Linux only

Acknowledgement

Omry Yadan for writting the JNotify library and Matthew Donoughe for providing the Mac OS X support.

License

(The MIT License)

Copyright (c) 2011 Michael Kessler

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.