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The State Transparented Web Application
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Kohei Asai
January 13, 2017
Programming
1
260
The State Transparented Web Application
2017/01に社内勉強会で話した何かです
Kohei Asai
January 13, 2017
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Transcript
WebΫϥΠΞϯτΞϓϦέʔγϣϯʹ ͓͚ΔεςʔτϚγϯͱಁաతΠϯ λʔϑΣʔε @axross
whoami » @axross / Kohei Asai » Web Application Developer
ΑΖ͓͘͠ئ͍͠·͢
WebΫϥΠΞϯτʹ͓͚Δ…Կʁ » ཁFluxͱ͔Reactͱ͔ͷ » ࠜຊతͳߟ͑ํͱ͔ » ͜ͷʹڵຯΛ࣋ͬͯͦ͏ͳਓ͕͍ͨ
WebΫϥΠΞϯτΞϓϦέʔγϣϯʁ » ࠓͷWebϑϩϯτΤϯυʹ2छྨ͋Δ » WebυΩϡϝϯτ » ओʹ੩తͳใΛఏڙ͢Δ » WebΫϥΠΞϯτΞϓϦέʔγϣϯ »
ओʹιϑτΣΞΛఏڙ͢Δ
WebΫϥΠΞϯτΞϓϦέʔγϣϯͷ಄ » ͋͑ͯʮมભͨ͠ʯͱݴΘͳ͍ » ࠓWebυΩϡϝϯτଘࡏ͢Δ (ͱ͍͏͔Webຊདྷͦ͏͍͏༻్ ͷͣ) » React͕৽͍͔͠ΒjQueryΊΑ͏ʂͱ͔Ͱͳ͍ͱࢥ͏ »
ͱ͍͑ɺॻ͔ΕΔJavaScript͕ΞϓϦέʔγϣϯͱͯ͠ͷମࡋΛอ ͭͦΕʹͳͬͨ
FluxͱReactʹ͍͓ͭͯ͞Β͍ ඞཁͷͳ͍ਓ৸͍ͯͯͩ͘͞
Flux » Facebook͕σβΠϯύλʔϯͱͯ͠ఏএͨ֓͠೦ » ΦϒβʔόʔύλʔϯΛϕʔεͱͨ͠ঢ়ଶભҠཧͷΓํ » ViewͳͲ͕Action CreatorΛίʔϧ » αϒεΫϥΠϒ͍ͯ͠ΔStore͕Ԡ͠ɺϝοηʔδ(Action)ͷ༰
Λͱʹࣗͷཧ͢Δঢ়ଶΛߋ৽͢Δ
Fluxʹ͓͚ΔView » ViewStoreΛαϒεΫϥΠϒ͢Δ » Store͕ཧ͍ͯ͠Δঢ়ଶ͕ߋ৽͞ΕΔࡍʹɺͦͷมߋ͕σΟεύο ν͞ΕΔ » ߋ৽ޙͷঢ়ଶ͕ྲྀΕͯ͘ΔͷͰɺViewͦΕΛͱʹը໘Λ࠶ඳը ͢Δ
Virtual DOM » ViewʹྲྀΕͯ͘Δɺৗʹߋ৽ޙঢ়ଶͷશʹͳΔ (ࠩͰͳ ͍) » ͕ɺDOMࠩͷखଓ͖తͳߋ৽ΛΉ » Virtual
DOMͱ͍͏ঢ়ଶͱDOMͱͷதؒදݱ͕͋Εɺதؒදݱ ಉ࢜ͰࠩΛܭࢉͯ͠ɺDOMΛͲ͏มߋ͢Ε͍͍͔ͱ͍͏खଓ͖ ॲཧΛܾఆͰ͖Δ » ͍ͬͯ͏ͷΛ୲͏ͷ͕React
Flux ♥ React » ͭ·ΓFluxVirtual DOMͷΑ͏ͳΈ͕ͳ͍ͱཱͰ͖ͳ͍ » React͕͋Δ͜ͱͰɺFlux͕࣮༻Ͱ͖Δ
Α͘ݴΘΕΔ͜ͱ » ʮRedux (Flux)ͬͯεςʔτϚγϯ (༗ݶΦʔτϚτϯ)ͬΆ͍ΑͶʯ » ʮRedux (Flux)CQRSΛڧ੍Ͱ͖ΔΑͶʯ » (ͨͿΜFluxͷ͜ͱͳΜ͚ͩͲɺRedux͕༗໊ͳͷͰ໊ࢺͱͯ͠༻
͍ΒΕΔ)
༗ݶΦʔτϚτϯ σδλϧճ࿏ϓϩάϥϜͷઃܭͰΘΕΔ͜ͱ͕͋Γɺ͋ΔҰ࿈ͷঢ় ଶΛͱͬͨͱ͖ͲͷΑ͏ʹཧ͕ྲྀΕΔ͔ΛௐΔ͜ͱ͕Ͱ͖Δɻ ༗ݶ ݸͷʮঢ়ଶʯͷ͏ͪ1ͭͷঢ়ଶΛͱΔɻ͋Δ࣌Ͱ1ͭͷঢ়ଶ͔͠ͱΒ ͣɺͦΕΛͦͷ࣌ͷʮݱࡏঢ়ଶʯͱݺͿɻԿΒ͔ͷΠϕϯτ݅ʹ Αͬͯ͋Δঢ়ଶ͔Βผͷঢ়ଶͱҠߦ͠ɺͦΕΛʮભҠʯͱݺͿɻ ͦΕ ͧΕͷݱࡏঢ়ଶ͔ΒભҠ͠͏Δঢ়ଶͱɺભҠͷ͖͔͚ͬͱͳΔ݅Λྻ ڍ͢Δ͜ͱͰఆٛ͞ΕΔɻ
via. ༗ݶΦʔτϚτϯ - Wikipedia
FluxͷStore ͔ͨ͠ʹ // TodoStore#reduce() ... switch (action.type) { // ...
// ೖྗͷఆٛ case TodoActionTypes.TOGGLE_TODO: // ঢ়ଶભҠઌͷఆٛ (state.update()ͷฦ͕ભҠޙͷঢ়ଶ) return state.update( action.id, todo => todo.set('complete', !todo.complete), ); // ... } // ... via. flux/TodoStore.js at master · facebook/flux · GitHub
CQRS » ίϚϯυΫΤϦ (Command and Query Responsibility Segregation) » ಡΈࠐΈͱॻ͖ࠐΈΛΠϯλʔϑΣʔεͱͯ͠໌֬ʹ͚Δݪଇ
» Command (ॻ͖ࠐΈ) ඞͣ෭࡞༻Λ࣋ͪɺQuery (ಡΈࠐΈ) ෭ ࡞༻Λ࣋ͨͳ͍ » ͜ΕΒΛ໌֬ʹ͚Δ͜ͱͰɺϓϩάϥϜͷৼΔ͍ͷཧղͷ͠͞ ͕ܰݮ͞ΕΔ via. ϝΠϠʔઌੜͷҒେ͞ͱCommand-Query
Fluxʹ͓͚ΔCQRS » ঢ়ଶͷมߋඞͣAction CreatorΛ௨Δ → Command » ݱࡏͷঢ়ଶStore͔͠Γಘͳ͍ → Query
» ͦΕͧΕͷཁૉʹରͯ͠ٯͷૢ࡞Λ͢Δ͜ͱͰ͖ͳ͍ » ͔ͨ͠ʹ…ʁ
ͭ·ΓͲ͏͍͏͜ͱͩͬͯΑʁ » Flux༗ݶΦʔτϚτϯͷΑ͏ʹৼΔΘͤΔ͜ͱ͕Ͱ͖Δ » FluxʹΑͬͯCQRS͕ڧ੍͞ΕΔ » React͕͋Δ͜ͱʹΑͬͯFlux͕࣮༻Ͱ͖Δ » ͭ·ΓɺFluxͱ͍͏εςʔτϚγϯͱɺReactͱ͍͏ಁաతϢʔβʔ ΠϯλʔϑΣʔεʹΑͬͯΞϓϦέʔγϣϯΛߏங͢Δ
» (༗ݶΦʔτϚτϯͱ͔CQRSͱ͔ʹ໌Δ͘ͳ͍ͷͰؒҧͬͯͨΒϚα ΧϦ͍ͩ͘͞)
ͦΜͳ͜ͱͰ͖Μͷ(ຊʹͰ͖ͯΜͷ)ʁ » ʮFluxͱReact͚ͩʯͰແཧ… » ֤ʑ͕࣌ؒ࣠Λ࣋ͭ֓೦Λѻ͏ͷ͕͍͠ » ඇಉظతॲཧΛͲ͏͢Δ͔ » ΞχϝʔγϣϯΛͲ͏͢Δ͔ »
ࣄ࣮ɺ࣌ʮFluxͷͲ͜ͰAjaxΛ͢Δ͔ʯͱ͍͏͍Ͱք۾͕ ৭ʑΞϨͨ͠
ͨͱ͑ʁ » ϢʔβʔϑΟʔυόοΫΛ͖ͪΜͱ͢ΔͳΛ࡞Δલఏ » Ϧετͷ߲Λϩʔυ(ߋ৽)͍ͨ͠ → ϩʔσΟϯάதʹͦͷࢫΛදࣔ ͍ͨ͠ » ϝοηʔδ(Action)͕2ͭಉ࣌ʹσΟεύον͞ΕΔඞཁ͕͋Δ
» StoreͷதͰྫ֎Τϥʔ͕ൃੜͨ͠ΒͲ͏͢Δ͔ʁ » ఘΊ͍ͨ » ௨ৗൃੜ͠ͳ͍Α͏ͳྫ֎ఘΊͯΫϥογϡ͍ͤͨ͞
͡Ό͋Ͳ͏͢Δ͔ʁ » Store͔ΒActionΛݺɺҰԠͰ͖Δ » ͱ͍͑ɺ͜ΕFluxͰېࢭ͞Ε͍ͯΔ » σʔλϑϩʔ͕୯ํͰ͋Δͱ͍͏ϝϦοτΛࣦͬͯ͠·͏ » Fluxͷ্ʹ͏ҰͭɺԿ͔Λෑ͘ඞཁ͕͋Δ
Fluxͷ্ʹԿ͔Λෑ͘ʁ » ʮϢʔεέʔεʯ : Ϣʔβʔೖྗ͔ΒɺAction CreatorΛฒྻɾ ྻʹΈ߹Θͤͯίʔϧ͢Δखଓ͖తͳ͕ඞཁ » redux-sagaɺredux-thunkɺredux-observable »
ReduxͷϛυϧΣΞͱͯ͠ɺಠࣗDSLͳͲͰϢʔεέʔεΛ࡞ Δ » ΫϦʔϯΞʔΩςΫνϟͳͲ » தنҎ্Ͱ͋Εɺ͖ͪΜͱͨ͠ΞʔΩςΫνϟʹͤΔͷ ख
ྫ Viewͱ༗ݶΦʔτϚτϯͱͯ͠ͷFlux͕ଘࡏɺͦͷؒʹUsecase
ͦͷଞ » iOSAndroidͰFluxͷ׆༻ྫ͕૿͖͑ͯͨ » ͱ͍͑ɺiOSAndroidʹVirtual DOMͳ͍ͷͰɺԿΒ͔ͷ Έඞཁ » facebook/componentkit »
zserge/anvil » ͱ͍͏͔ήʔϜͱ͔ͩͱɺ͜͏͍͏ΓํΛ͍ͯ͠Δͷ͕ଟ͍ » WebϑϩϯτΤϯυੜ࢈ੑΛམͱ͞ͳ͍ઃܭͰ։ൃ͍͖ͯ͠·͠ΐ ͏