Thread and Queue

Question

I am interested in knowing what would be the best way to implement a thread based queue.

For example:

I have 10 actions which I want to execute with only 4 t

Answer 1

You could use a thread pool. It's a fairly common pattern for this type of problem.
http://en.wikipedia.org/wiki/Thread_pool_pattern

Github seems to have a few implementations you could try out:
https://github.com/search?type=Everything&language=Ruby&q=thread+pool