This is a pure extraction from Nick Kallen’s cache-money.

sudo gem install memcache-lock -s http://gemcutter.org

(Note: If you already have the gemcutter gem installed, you can omit the -s part)

Instantiate the lock somewhere, like in an initializer if you’re using rails. It will be using Rails.cache by default.

$lock  = MemcacheLock.new()

Then, wherever you’d like to lock a key, use it like this:

$lock.synchronize("some-memcache-key") do
  # stuff that needs synchronization in here
end

For more info, see lib/memcache-lock.rb. It’s very straightforward to read.

• Fork the project.

• Make your feature addition or bug fix.

• Add tests for it. This is important so I don’t break it in a future version unintentionally.

• Commit, do not mess with rakefile, version, or history. (if you want to have your own version, that is fine but

  bump version in a commit by itself I can ignore when I pull)

• Send me a pull request. Bonus points for topic branches.