Ruby eventmachine pres @rubybdx

Eventmachine basics. Understand low lovel to avoid mistakes.
More infos on http://www.mathieu-elie.net/eventmachine-introduction-pres-rubybdx-screencast-fr

Transcript

1. EVENTMACHINE fast, simple event-processing library for Ruby programs lundi 15 octobre 12
2. EventMachine Components • Reactor • Your code (callbacks) • Tread pool (non blocking long running tasks) lundi 15 octobre 12
3. Reactor • Main loop / Central point • Dispatch call to business code (your code) • Single threaded ! lundi 15 octobre 12
4. Reactor • run-reactor.rb • EM.run block until its stopped • its not really blocking, the reactor pattern is running forever ;) lundi 15 octobre 12
5. Your code • Called by reactor • blocking ! (called by a single thread dispatcher aka reactor) lundi 15 octobre 12
6. Your code • each timer own a callback, like any code like network call etc.... • a long running task will block the reactor lundi 15 octobre 12
7. Tread pool • Pool fixed size ! • Dont block the reactor if you have a long running task • use the thread pool ! lundi 15 octobre 12
8. Tread pool • EM.defer -> run the callback inside on thread on the pool thread • Reactor continue to dispatch to other code. nice ! lundi 15 octobre 12
9. simple server • module implements callbacks: easy ! • see the EventMachine.run - > launch the reactor • Inside reactor -> start server :) lundi 15 octobre 12
10. contact / more infos • http://www.mathieu-elie.net -> tech blog -> and all concact infos (github, linkedin, and so on...) • available for freelance • questions ? feel free to mail me :) lundi 15 octobre 12