Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Async Programming & Actor Model
Search
Pishen Tsai
July 24, 2015
0
81
Async Programming & Actor Model
Pishen Tsai
July 24, 2015
Tweet
Share
More Decks by Pishen Tsai
See All by Pishen Tsai
Introduction to Minitime
pishen
1
150
都什麼時代了,你還在寫 while loop 嗎?
pishen
2
720
Pishen's Emacs Journey
pishen
0
130
Scala + Google Dataflow = Serverless Spark
pishen
6
840
Shapeless Introduction
pishen
2
900
ScalaKitchen
pishen
1
430
sbt-emr-spark
pishen
1
140
My Personal Report of Scala Kansai 2016
pishen
0
310
SBT Basic Concepts
pishen
1
620
Featured
See All Featured
実際に使うSQLの書き方 徹底解説 / pgcon21j-tutorial
soudai
PRO
188
55k
The Illustrated Children's Guide to Kubernetes
chrisshort
48
50k
The Straight Up "How To Draw Better" Workshop
denniskardys
236
140k
Music & Morning Musume
bryan
46
6.8k
The MySQL Ecosystem @ GitHub 2015
samlambert
251
13k
We Have a Design System, Now What?
morganepeng
53
7.8k
How STYLIGHT went responsive
nonsquared
100
5.8k
Imperfection Machines: The Place of Print at Facebook
scottboms
268
13k
Raft: Consensus for Rubyists
vanstee
140
7.1k
Evolution of real-time – Irina Nazarova, EuRuKo, 2024
irinanazarova
8
920
10 Git Anti Patterns You Should be Aware of
lemiorhan
PRO
656
61k
Learning to Love Humans: Emotional Interface Design
aarron
273
40k
Transcript
Async Programming & Actor Model @pishen
Asynchronous programming val a: Future[Int] = Future { //time-consuming process
result } a.map(x => x + 1) callback listener
Asynchronous programming val a: Future[Int] = ??? def f(x: Int):
Future[Int] = ??? val r = a.map(x => f(x)) Future[Future[Int]]
Asynchronous programming val a: Future[Int] = ??? def f(x: Int):
Future[Int] = ??? val r = a.flatMap(x => f(x)) Future[Int]
Asynchronous programming val a: Future[Int] = ??? def f(x: Int):
Future[Int] = ??? val r = a.flatMap(x => f(x)) val p = Await.result(r, 3.seconds) Int
T T T T T T T Future { ???
} a.map(???) ??? Await(???)
T T T T T T T Future { ???
} a.map(???) F ??? Await(???)
T T T T T T T Future { ???
} a.map(???) F ??? Await(???)
T T T T T T T Future { ???
} a.map(???) F ??? F Await(???)
T T T T T T T Future { ???
} a.map(???) F ??? F Await(???)
T T T T T T Future { ??? }
a.map(???) F F ??? Await(???) T
T T T T T T Future { ??? }
a.map(???) F F ??? Await(???) T
T T T T T T Future { ??? }
a.map(???) F F ??? Await(???) T
T T T T T T Future { ??? }
a.map(???) F F ??? Await(???) T
T T T T T T Future { ??? }
a.map(???) F F ??? Await(???) T
T T T T T T Future { ??? }
a.map(???) F F ??? Await(???) T C C
T R
T R R R
T R R R C C C C C C
C C
T R C C C C C C C C
T T R R
T R C C C C C C C C
T T R R R R R R R R R R R R R R 1000+
Orz T T R C C C C C C
C T T R R R R R R R R R R R R R R 1000+ T T T T T T T T T switching thread takes time... crashed, nothing get computed after all...
R C C C C C C C T R
R R R R R R R R R R R R R 1000+ T thread pool C T T T T T T
R C C C C C C C T R
R R R R R R R R R R R R R T C T T T T T T access DB long computing
R C C C C C C C T R
R R R R R R R R R R R R R T C T T T T T T access DB long computing blocking
R C C C C C C C T R
R R R R R R R R R R R R R C T T T T T T T T T T T T T T T T T T T T T T T T T T T T T F F F F F F 1000+ async squeeze out the performance of your machine
Life is beautiful ...before you have states.
HP MP position weapon exp hunger Running Attacked Attacking Eating
HP MP position weapon exp hunger Running Attacked Attacking Need
lock(s) to prevent strange things happen. Eating
HP MP position weapon exp hunger Running Attacked Attacking No
matter you forward the job to DB or what. Eating
HP MP position weapon exp hunger Running Attacked Attacking All
the other threads get blocked. Eating
Can we get rid of the locks?
P W Wrap the states in an Actor. T m
h p a e mailbox
P W Wrap the states in an Actor. T m
h p a e mailbox T
P W Wrap the states in an Actor. T m
h p a e mailbox T
T T T T T T T T T T
T T T T T T T front m back
T T T T T T T T T T
T T T T T T T front m l back
T T T T T T T T T T
T T T T T T T front m l back Disk
Life is beautiful ...before you have many machines.
T T T T T T T T T T
T T T T T T T front m l back Machine A T T T T T T s Machine B Disk
Tell & Ask val a: ActorRef = ctx.actorOf(???) a !
“Hello!” (a ? “What’s your name?”) .mapTo[String] .map(name => ???)
Receive messages class MyActor extends Actor { def receive =
{ case “Hello!” => ??? case “What’s your name?” => sender ! “Pishen” } }
Create the Future[T] with Scala~