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Thinking in Actors @sasajuric

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CPU CPU CPU CPU CPU CPU CPU CPU

bank account balance http request socket database connection

“deposit”, 300 “store”, account_id, ... http request bank account database ok ok

bank account balance “deposit”, 300 “withdraw”, 200 “balance”

defmodule BankAccount do use ExActor.GenServer definit do initial_state(0) end defcast deposit(amount), state: balance do new_state(balance + amount) end defcast deposit(amount), state: balance do if amount <= balance do new_state(balance – amount) else new_state(balance) end end defcall balance, state: balance do reply(balance) end end

account = find_account(id) BankAccount.withdraw(account,200) account = find_account(id) BankAccount.deposit(account,300) account = find_account(id) balance = BankAccount.balance(account) client 1 client 2 client 3 account = BankAccount.start

http http bg job http clients accounts database

> 30 active events > 5,000 simultaneous players > 2,000 requests/sec

1.accept TCP packets 2.assemble XML messages 3.update the model 4.store to database 5.serialize the model 6.dispatch

tcp listener xml assembler model builder serializer persister dispatcher

tcp listener xml assembler model builder serializer persister dispatcher message 6 message 5 message 4 message 3 message 2 message 1

tcp listener xml assembler model builder serializer persister dispatcher

persister tcp listener xml assembler model builder serializer dispatcher

... ... ... ...

i model builder serializer dispatcher match 1 match 2 match 3 match 4 match 5

i

i match 1 match 2 match 3 match 4 match 5

player match http request subscription notification query new messages

http://www.manning.com/juric/ wcp14twcf