ruby+actors

1. Actors

   • high level concurrency abstraction
     • thread:actor != 1:1
   • concurrent objects/processes, exist and exectute independently
     • each actor has it's own state, they (ideally) share nothing
     • erlang has immutable data structures, ruby doesn't (take care of it yourself!)
   • recomendation - concurrency is not parallelism talk

2. Ruby Actors - Celluloid

   • OOP actor = cell, Erlang actors are processes that have no state, Ruby actor have state in for of instance variables
   • internals:
     • each object/actor runs in a separate thread
     • each task is executed in it's own fiber (enables long lasting ops to be suspended)
   • implements the core erlang ideas:
     • linking/monitoring
     • supervisors
   • some other cool features:
     • futures
     • pools

3. Demo ...