Palestra no Floripa on Rails em conjunto com o @jaisonerick mostrando como trabalhar com threads e processos assíncronos na linguagem Ruby. Mostramos cases da SumOne e também Resultados Digitais. Veja mais em floripaonrails.com.br

1. @jaisonerick
@jonatasdp
hosted by supported by
Concurrency

2. Concurrency

3. Case 1:
Migrating DATA

4. Migrating DATA
Case da BONUZ
(@jaisonerick)

5. Migrating DATA
Case da Resultados Digitais
(@jonatasdp)

6. Case 2:
BONUZ
WEB APPLICATIONS

7. Pessimistic Optimistic

8. MODE
● SHARED
● EXCLUSIVE

9. Exclusive Pessimistic Lock
SELECT * FROM `accounts` where `id`=1 FOR UPDATE;

10. Shared Pessimistic Lock
SELECT * FROM `accounts`
where `id`=1 LOCK IN SHARE MODE;

11. Item Model:
Item Controller:

12. Threads
● MUTEX
● DEAD LOCK

13. Encapsulated

15. Always lock in the
same order!

16. ● Don't do it, if you can avoid it.
● If you must do it, don't share data across
threads.
● If you must share data across threads, don't share
mutable data.
● If you must share mutable data across threads,
synchronize access to that data.
JRUBY - Concurrency Rules:

17. Testing Concurrency
...with concurrency

19. Hands On!

20. Perguntas?