Web Api Clientを考える #dotsandroid

Androidオールスターズ 2015/8/8 の資料です

Transcript

1. Web Api ClientΛߟ͑Δ
   AndroidΦʔϧελʔζ 2015/8/8 #dotsandroid
   @__gfx__ at Cookpad, Inc.
   

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2. Introduction to myself
   • github:gfx, twitter:__gfx__, FUJI Goro
   • ΫοΫύουॴଐ
   • ΫοΫύουΞϓϦͷϦϦʔε؅ཧɾϝϯ
   ςφϯεΛओʹ͍ͯ͠Δ
   • ࠲ӈͷ໏͸ʮਖ਼͍͠ίʔυΛॻ͜͏ɻಈ
   ͘ίʔυͰຬ଍ͤͣʹʯ
   

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3. ϥΠϒϥϦͷબఆํ਑
   • Android൛ΫοΫύουΞϓϦͰ࠾༻͍ͯ͠Δٕज़ͷݱ
   ঢ়֬ೝ http://techlife.cookpad.com/entry/2015/06/25/
   093507
   • “ΫοΫύουͷ΢ΣϒαʔϏεಉ༷ʹɺϞόΠϧΞϓ
   Ϧͷ։ൃ΋͜ͷઌ10೥Ҏ্ଓ͘Ͱ͠ΐ͏ɻ͕ٕͨͬͯ͠
   ज़બ୒ͷجຊతͳࢦ਑ʹ͓͍ͯ͸ɺ͜ͷઌ10೥ؒܧଓ͠
   ͯϝϯςφϯε͓Αͼߋ৽͍ͯ͘͜͠ͱ͕Ͱ͖Δ͔Ͳ͏
   ͔͕ॏཁͰ͢ɻ”
   

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4. Web Api Client
   

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5. ͳͥWeb Api Client͕ॏཁͳͷ͔
   • ଟ͘ͷεϚϗΞϓϦ͸ɺWeb APIͷΠϯλʔϑΣΠ
   εʹ͗͢ͳ͍
   • Cookpad΋ྫ֎Ͱ͸ͳ͘ɺΞϓϦ͸جຊతʹ
   JSONΛฦ͢Web API΁ͷΠϯλʔϑΣΠεͰ͋
   Δ
   • Ώ͑ʹWeb Api ClientͰ࢖͏Http ClientΛԿʹ͢
   Δ͔͸ඇৗʹॏཁ
   

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6. ༻ޠ
   • Web Api Client
   • υϝΠϯݻ༗ͷWeb ApiΛݺͼग़͢ΫϥεϥΠϒϥϦ
   • Picasso, GlideͳͲͷը૾μ΢ϯϩʔμ΋Web Api ClientͷҰछ
   • ௿ϨϕϧHttp Client
   • HTTPΛ࣮૷ͨ͠ΫϥεϥΠϒϥϦ
   • Apache HTTP client, HttpURLConnection, OkHttpͳͲ
   • ߴϨϕϧHttp Client
   • ௿ϨϕϧHttp ClientΛϥοϓͯ͠࢖͍΍ͨ͘͢͠ΫϥεϥΠϒϥϦ
   • Volley, RetrofitͳͲɻWeb Api Clientͱͷ۠ผ͸ᐆດͳ͜ͱ͕͋Δ
   

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7. ௿ϨϕϧHttp Clientੇධ
   

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8. Apache HTTP Client
   • Androidʹ૊Έࠐ·Εͨ௿ϨϕϧHttp Client
   • DEPRECATED! DEPRECATED! DEPRECATED!
   • ૊ΈࠐΈ൛ͱϦϦʔε൛ͷဃ཭͕େ͖͍
   • multipart requestͳͲมΘͬͨ͜ͱΛ͢Δʹ͸૊ΈࠐΈ൛Ͱ͸଍
   Γͣɺద੾ͳόʔδϣϯͷϦϦʔε൛ίϯ
   ϙʔωϯτΛ࢖͏ඞཁ͕͋Δ
   • ͳͥAndroid frameworkʹ૊ΈࠐΜͩͷͩ…
   

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9. HttpURLConnection
   • Javaඪ४ΫϥεϥΠϒϥϦͷHttp Client
   • యܕతͳ࢖͍ํͰΩϟετ͕ඞཁͱ͍͏ҟৗͳઃܭ
   • (HttpURLConnection) url.openConnection();
   • ΠϯλʔϑΣΠε͸HTTPΛӅṭ͍͗ͯͯ͢͠෼͔Γʹ͍͘
   • Android 4.4Ҏ߱͸όοΫΤϯυ࣮૷͕OkHttpʹͳͬͨ
   ͕ɺ͜Ε͕ΩϟογϡपΓʹόά͕͋ΓΫϥογϡ͢Δͷ
   Ͱ࢖Θͳ͍΄͏͕ແ೉
   

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10. OkHttp
    • Squareࣾ։ൃͷ௿ϨϕϧHttp Client
    • HTTP/2αϙʔτ
    • ಉظAPIͱඇಉظAPI྆ํ͋Δ
    • ͳͥ྆ํ༻ҙͨ͠͠…͜Εͷ͍ͤͰʢ͈́
    • Android૊ΈࠐΈͰͳ͍ͷ͕େ͖ͳϝϦοτ
    • ࣮ߦ͞ΕΔίʔυΛ׬શʹ༧ଌͰ͖Δʂʂʂ
    

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11. ཧ૝తͳ௿ϨϕϧHttp Client
    • ϚϧνεϨουΛѻΘͳ͍͜ͱ
    • ฒྻϦΫΤετͳͲ͸ΑΓ্ҐϨΠϠͰ΍Δ
    ΂͖
    • ͨͩ͠εϨουηʔϑͰ͸͋Δ΂͖
    • pure JavaͰ࣮૷͠ɺAndroid frameworkͷ
    Http Clientʹґଘ͠ͳ͍͜ͱ
    

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12. ߴϨϕϧHttp Clientੇධ
    

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13. Volley
    • 2013೥ͷGoogle I/O ʹͯክ੕ͷΑ͏ʹݱΕ
    ͨߴϨϕϧHttp Client
    • AndroidքͷελϯμʔυʹͳΔ͔ͱࢥΘΕͨ
    ͕…
    

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14. VolleyͷΑ͍ͱ͜Ζ
    • HttpStackʹΑΓɺ௿ϨϕϧHttp ClientΛ੾Γସ͑Մೳ
    • Apache HTTP Client, HttpURLConnection (Hurl), OkHttp
    (via okhttp-urlconnection)
    • RequestQueueΫϥεʹΑΓɺHttpStackʹ౉͢લͷϦΫΤε
    τΩϡʔΛࡉ੍͔͘ޚՄೳ
    • ΫοࣾͷෳࡶͳೝূγεςϜΛ௨աͤ͞Δͷʹ͜Ε͕ඞཁ
    ͩͬͨͨΊ࠾༻
    • ͞·͟·ͳίϯϙʔωϯτ͕֦ுՄೳ
    

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15. Volleyͷμϝͳͱ͜Ζ
    • Ϋϥεଟ͗͢ɺ࣮૷ෳࡶ͗͢ɺ֦ு͕೉͗͢͠
    • ϦΫΤετΛΦϯϝϞϦͰॲཧ͢ΔઃܭͳͨΊɺ
    ը૾ΞοϓϩʔυΛ͠Α͏ͱ͢Δͱॲཧ͕ෳࡶ
    ͰόοΫΤϯυͷHttp Clientʹґଘ͕ͪ͠
    • ࠓ΍deprecatedͱͳͬͨApache HTTP Client
    ͷߏ଄ମ܈ͱີ݁߹͍ͯͯ͠੾Γ཭͕͠ࠔ೉
    

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16. Retrofit
    • Squareࣾ੡ͷߴϨϕϧHttp Client
    • interfaceΛఆٛ͢Δ͚ͩͰWeb Api ClientΛ
    ࡞੒Ͱ͖Δ
    • RxJavaΠϯλʔϑΣΠε΋݉Ͷඋ͍͑ͯΔ
    

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17. Retrofitͷ͍͍ͱ͜Ζ
    • ద౰ͳσϑΥϧτͰΑ͠ͳʹಈ͘
    • interfaceΛఆٛ͢Δ͚ͩͰWeb Api ClientΛੜ੒Ͱ͖
    Δ
    • ͔͠΋RxJavaΠϯλʔϑΣΠε΋͋Δ
    • όοΫΤϯυͷ௿ϨϕϧHttp ClientΛ੾Γସ͑ΒΕΔ
    • ΠϯλʔϑΣΠε͸ඇৗʹ୯७Ͱ࣮૷͠΍͍͢
    

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18. Retrofitͷμϝͳͱ͜Ζ
    • Web Api ClientΛΞϊςʔγϣϯͱϦϑϨΫγϣϯͰ੍ޚ͍ͯ͠ΔͨΊ
    ࣮૷Λ௥͍ʹ͍͘
    • ͍ͣΕ੩తίʔυੜ੒ܕʹͳΕ͹͋Δఔ౓͸ղফ͢Δ͔΋
    • “Request”ͷΑ͏ͳ൚༻తͳ໊લΛ࢖͍͗͢ʢOkHttpͱ΋ඃͬͯΔʣ
    • σϑΥϧτ͸ʮݡ͍ʯ͕ద੾ͱ͸ݶΒͳ͍
    • OkHttp΍RxJava͕ར༻Մೳ͔Ͳ͏͔ͰৼΔ෣͍͕มΘΔ
    • ϦΫΤετΛॲཧ͢ΔσϑΥϧτͷExecutor͕cached thread pool
    executorsͳͷͰεϨουΛ࡞Γ͗͢ΔՄೳੑ͕͋Δ
    

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19. ཧ૝తͳߴϨϕϧHttp Client
    • ʮݡ͍σϑΥϧτʯ͸ෆཁ
    • ͋ΔϥΠϒϥϦ͕ೖ͍ͬͯΔͱৼΔ෣͍͕มΘΔͳͲ͸࠷ѱ
    • Android͸Ϧιʔε͕গͳ͍͜ͱʹཹҙ͢Δ
    • εϨουΛͲ͏࢖͏͔ɺΞϓϦ͔Β੍ޚͰ͖Δ͔Ͳ͏͔͸ௐ
    ΂ͨ΄͏͕Α͍
    • ϦΫΤετͱϨεϙϯεͷஔ׵͕Ͱ͖Δ͔Ͳ͏͔
    • ෳࡶͳೝূΛ௨աͰ͖Δ͔Ͳ͏͔
    

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20. Thread Pool
    

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21. εϨουϓʔϧ͸ͳͥॏཁ͔
    • HTTPϦΫΤετΛฒྻͰ࣮ߦ͢ΔͨΊʹ࢖͏
    • 1ͭͷը໘Λ࡞ΔͨΊʹෳ਺ͷϦΫΤετ͕ඞ
    ཁͳ৔߹ɺ௚ྻ࣮ߦͩͱ1ͭͷϦΫΤετͷॲ
    ཧʹֻ͕͔࣌ؒͬͯΞϓϦશମ͕஗͘ͳΔ
    • ฒྻʹϦΫΤετΛ࣮ߦ͢Δͱɺ஗͍ϦΫΤ
    ετʹҾ͖ͣΒΕΔ౓߹͍͕খ͘͞ͳΔ
    

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22. εϨουϓʔϧʹ͍ͭͯ
    • AndroidͰ࡞ΕΔThread͸1000~10000ݸఔ౓
    • ্ݶʹୡ͢ΔͱΞϓϦ͕ٸࢮ͢Δࣄ͕͋ΔͷͰ
    new Thread() ͸ةݥ
    • ͦ͜ͰεϨουϓʔϧͰεϨουΛ࢖͍·Θ͢
    • Web Api Client͸ฒྻϦΫΤετͷͨΊʹεϨο
    υϓʔϧΛ࢖͏
    

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23. ϦΫΤετ
    1SJPSJUZ#MPDLJOH2VFVF5
    5ISFBE 5ISFBE 5ISFBE
    Ϩεϙϯε
    5ISFBE1PPM*NQMFNFOUBUJPO
    

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24. Thread PoolͷͦΕͧΕͷ࣮૷
    • OkHttp - ೚ҙͰඪ४Cached Thread Pool
    • Retrofit - ඪ४Cached Thread Pool
    • Volley - ಠ࣮ࣗ૷ͷFixed Thread Pool
    • Picasso - ඪ४Fixed Thread Pool
    • ੍ޚՄೳ͕࣮ͩ૷ʹΑͬͯσϑΥϧτ஋͕ҧ͏ͷͰ஫
    ҙ
    

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25. java.util.concurrent.Executors
    • εϨουϓʔϧΛੜ੒͢Δඪ४ΫϥεϥΠϒϥϦ
    • newCachedThreadPool() - ඞཁͳ͚ͩεϨου
    Λ࡞Γ࠶ར༻͢ΔεϨουϓʔϧʢεϨου਺
    ͷ্ݶͳ͠ͳͷͰةݥʣ
    • newFixedThreadPool() - εϨου਺ݻఆͷε
    Ϩουϓʔϧ
    

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26. Thread Pool ϕετϓϥΫςΟε
    • ௿ϨϕϧHttp Client͸εϨουϓʔϧΛ࣋ͨͣɺߴ
    ϨϕϧHttp Client͕࣋ͭ
    • σϑΥϧτʹ͸པΒͣΞϓϦ͕executorΛੜ੒ͯ͠
    ౉͢
    • εϨουΛ࡞Γա͗ͳ͍Fixed Thread PoolΛ࢖͏
    • IOό΢ϯυͷ৔߹͸εϨου਺3͘Β͍ͰΑͦ͞͏
    

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27. ݁࿦
    • ݱঢ়ͩͱOkHttp + Retrofit͕Αͦ͞͏
    • RetrofitͷσϑΥϧτεϨουϓʔϧʹ஫ҙ
    • ͱ͸͍͑Retrofit΋ΘΓͱෆຬ͕͋ΔͷͰͲ͏
    ͠Α͏͔ͳͱ͍͏ؾ࣋ͪ
    

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28. That’s all.
    • Any questions?
    • ͜ΜͳͷศརͩΑͱ͍͏࿩͕͋Ε͹ @__gfx__
    ·Ͱڭ͍͑ͯͩ͘͞ʂʂʂ
    

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