Source code for https://lbarasti.com/post/ruby_ractor
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def source(generator, target:, name: nil) | |
Ractor.new(generator, target, name: name) do |generator, target| | |
loop do | |
target.send generator.next | |
end | |
end | |
end | |
def buffer | |
Ractor.new do | |
loop do | |
Ractor.yield Ractor.receive | |
end | |
end | |
end | |
def worker(behaviour, source:, name: nil) | |
Ractor.new(behaviour, source, name: name) do |behaviour, source| | |
state = behaviour.init_state | |
loop do | |
state = behaviour.receive(source.take, state) | |
end | |
end | |
end |
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require "prime" | |
require_relative "./components" | |
module RandInt | |
MAX_INT = 10**23 | |
def self.next | |
sleep rand * 0.2 | |
rand(MAX_INT) + 1 | |
end | |
end | |
module PrimeTest | |
def self.init_state | |
Hash.new # cache | |
end | |
def self.receive(msg, cache) | |
case [msg, cache[msg]] | |
in m, nil | |
cache[m] = m.prime? | |
in m, is_prime | |
puts "cache hit for #{m}" | |
end | |
puts "#{Ractor.current.name}: #{msg} #{cache[msg]}" | |
cache | |
end | |
end | |
bfr = buffer | |
(1..2).map { |i| | |
source(RandInt, target: bfr, name: "source_#{i}") | |
} | |
(1..5).map { |i| | |
worker(PrimeTest, source: bfr, name: "worker_#{i}") | |
} | |
sleep |
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