goroutineとマルチスレッドデザインパターン/ goroutine and multithreaded design pattern

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goroutineͱ ϚϧνεϨου  σβΠϯύλʔϯ ߦ໦ লޗ

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ࣗݾ঺հ • ߦ໦ লޗ(φϝΩ γϣ΢ΰ) • 2016೥౓৽ଔ • Goݴޠྺ 5ϲ݄

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goroutine࢖ͬͯ·͔͢?

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GoݴޠΛޠΔ্Ͱ ֎ͤͳ͍ฒྻԽͷػೳ

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͜ͷ࢖͍ํ͋ͬͯΔʁ ͢ΕͬͲ͜Θ͍

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goroutineͷߟ͑ํͱ σβΠϯύλʔϯ

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GoͰͷฒߦॲཧ

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υΩϡϝϯτΛॲ෼͢Δ࢓ࣄ υΩϡϝϯτͷࢁ ম٫࿍ Gopher͘Μͱ  Χʔτ ͨ͘͞Μ͋ΔυΩϡϝϯτΛ೩΍͍ͨ͠

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୯७ͳΞϓϩʔν Gopher͘ΜΛ2ඖ(ਓ?)ʹ

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ಉظ଴͕ͪൃੜͯ͠͠·͏ ম٫࿍Λ࢖͑Δͷ͸1౓ʹ1ඖ(ਓ?)

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ಉظ଴͕ͪൃੜͯ͠͠·͏ ম٫࿍Λ࢖͑Δͷ͸1౓ʹ1ඖ(ਓ?)

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૿΍ͯ͠΋ޮՌ্͕͕ΓͮΒ͍

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GoݴޠͰͷΞϓϩʔν

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ฒྻͳॲཧ Gopher͘ΜΛฒྻʹಈ͔͢ͷͰ͸ͳ͘

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ฒߦͳॲཧ Gopher͘ΜΛฒߦʹಈ͔͢

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ฒߦͳॲཧ υΩϡϝϯτΛΧʔτʹੵΉGopher͘Μ

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ฒߦͳॲཧ ΧʔτΛӡͿGopher͘Μ

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ฒߦͳॲཧ υΩϡϝϯτΛΧʔτ͔Β͓Ζͯ͠ ೩΍͢Gopher͘Μ

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ฒߦͳॲཧ υΩϡϝϯτΛੵΜͰ͍ͨ ΧʔτΛ໭͢Gopher͘Μ

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Կ͕خ͍͠ͷ͔

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ॲཧΛ଴ͨͳͯ͘ྑ͍

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ॲཧΛ଴ͨͳͯ͘ྑ͍ ӡͿͷ͕࢓ࣄ

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ॲཧΛ଴ͨͳͯ͘ྑ͍ ೩΍͠ऴΘΔͷΛ ଴ͨͳ͍

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΍Δ͜ͱ͕ͳ͚Ε͹ࢭ·Δ͚ͩ

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͜ΕΒΛ࣮ݱ͢Δػೳ • channel • Gopher͘ΜͷؒΛܨ͍Ͱ͘ΕΔ • ෳ਺ͷGopher͘Μ͕channelΛୣ͍߹͏ͷΛ๷͙ • select • ෳ਺ͷGopher͘Μ͔ΒຊΛड͚औΕΔ • mutexͷύοέʔδͱ͔

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ϚϧνεϨου σβΠϯύλʔϯ

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ϚϧνεϨου  σβΠϯύλʔϯ • Single Thread Execution • Immutable • Guarded Suspension • Balking • Producer-Consumer • Read-Write Lock • Thread-Per-Message • Worker Thread • Future • Two-Phase Termination • Thread-Speciﬁc Storage • Active Object

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channelͰղܾ • Single Thread Execution • Immutable • Guarded Suspension • Balking • Producer-Consumer • Read-Write Lock • Thread-Per-Message • Worker Thread • Future • Two-Phase Termination • Thread-Speciﬁc Storage • Active Object

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selectͰղܾ • Single Thread Execution • Immutable • Guarded Suspension • Balking • Producer-Consumer • Read-Write Lock • Thread-Per-Message • Worker Thread • Future • Two-Phase Termination • Thread-Speciﬁc Storage • Active Object

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ύοέʔδͰղܾ • Single Thread Execution • Immutable • Guarded Suspension • Balking • Producer-Consumer • Read-Write Lock • Thread-Per-Message • Worker Thread • Future • Two-Phase Termination • Thread-Speciﬁc Storage • Active Object

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ؾΛ͚ͭͳ͍ͱ͍͚ͳ͍͜ͱ

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ϚϧνεϨου σβΠϯύλʔϯ • Single Thread Execution • Immutable • Guarded Suspension • Balking • Producer-Consumer • Read-Write Lock • Thread-Per-Message • Worker Thread • Future • Two-Phase Termination • Thread-Speciﬁc Storage • Active Object

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Thread-Per Message • ϝοηʔδΛड͚औΔຖʹεϨουΛཱͯΔ

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Thread-Per Message • ϝοηʔδΛड͚औΔຖʹεϨουΛཱͯΔ υΩϡϝϯτΛड͚औͬͨΒ……

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Thread-Per Message • ϝοηʔδΛड͚औΔຖʹεϨουΛཱͯΔ ͦΕຖʹGopher͘ΜΛ࡞Δ

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Thread-Per Message • ϝοηʔδΛड͚औΔຖʹεϨουΛཱͯΔ

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Goͩͱ΍Γ͕ͪ func processHandler(w http.ResponseWriter, r *http.Request) { ~~~όϦσʔγϣϯͱ͔Payloadऔಘͱ͔~~ go Heavy() // ͜ͷ෦෼ʂʂʂ w.WriteHeader(http.StatusAccepted) }

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Worker Thread • ࠷ॳ͔ΒεϨουΛಈ͔͓ͯ͘͠

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Worker Thread • ࠷ॳ͔ΒεϨουΛಈ͔͓ͯ͘͠ υΩϡϝϯτΛ  ड͚औͬͨΒ…… !

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Worker Thread • ࠷ॳ͔ΒεϨουΛಈ͔͓ͯ͘͠ ۭ͍ͯΔ ୭͔͕୲౰

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Worker Thread • ࠷ॳ͔ΒεϨουΛಈ͔͓ͯ͘͠ ! ·ͨདྷͨΒ……

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Worker Thread • ࠷ॳ͔ΒεϨουΛಈ͔͓ͯ͘͠ ۭ͍ͯΔ ୭͔͕୲౰

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Worker Thread • ࠷ॳ͔ΒεϨουΛಈ͔͓ͯ͘͠ Gopher͘Μͷ ਺͸૿͑ͳ͍

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channelͩͱ؆୯ func heavy(queue <-chan string) { url := <-queue // ϦΫΤετॲཧ } func main() { queue := make(chan string, 32) for i := 0; i < 3; i++ { go heavy(queue) } queue <- “https://google.co.jp” queue <- “https://google.com” // লུ }