〇〇を切り出したいときに / Extract something from big rails app

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ʓʓΛ੾Γग़͍ͨ͠ͱ͖ʹ ͓͓͖ΊͷϦϑΝΫλΛ΍ΔPO3BJMTʢʁʣ TokyuRubyKaigi #12 !J[VNJO 2018.7.29 -

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izumin5210 Engineer at Wantedly, Inc. Wantedly People ‣ Web Application Engineer - Proﬁle Data Strategy Group ‣ Interests in developer productivity on microservices Gopher, Rubyist, JavaScripter and Androider

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˓˓Λ੾Γग़͍ͨ͠ɾҠߦ͍ͨ͠ ࢖͍·Θͤͦ͏ͳ࣮૷ %# .PEFM ػೳ γεςϜͷҰ෦

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ςετΛॻ͜͏ ϩάΛͱΖ͏ ͍͞͠ΐʹߟ͑Δ͜ͱ

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ςετΛॻ͜͏ ͦ΋ͦ΋ςετ͸ϦϑΝΫλϦϯάͷͨΊʹ͋Δʢۃ࿦ʣ ίʔυ͕յΕΔͱςετ͕མͪͯؾ͚ͮͯศར ͳ͔ͬͨΒؤுͬͯॻ͘ʢن໛ʹΑͬͯ͸ఘΊ΋؊৺ʣ ϩάΛͱΖ͏ ͍͞͠ΐʹߟ͑Δ͜ͱ

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ςετΛॻ͜͏ ϩάΛͱΖ͏ Ͳ͏͍͏ܦ࿏Ͱར༻͞ΕΔ͔ɼͲΕ͘Β͍ར༻͞ΕΔ͔ ͦ΋ͦ΋ESPQͰ͖ͳ͍͔ յΕͦ͏ͳͱ͜ΖͷςετΛॏ఺తʹॻ͚Δ ͍͞͠ΐʹߟ͑Δ͜ͱ

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DBMMFSΛه࿥͢Δ ࡶʹϩάΛཷΊࠐΊΔπʔϧɾαʔϏεΛ࢖͏ ƁŞƄŪžUJQT

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DBMMFSΛه࿥͢Δ ͡ `Thread.current[:controller] = controller_name`͠ͱ͘ͱศར ͋͘·ͰҰ࣌తͳϩάऩूͳͷͰɼਖ਼͠͞खܰ͞ɾརศੑ ࡶʹϩάΛཷΊࠐΊΔπʔϧɾαʔϏεΛ࢖͏ ƁŞƄŪžUJQT caller.find do |c| !c.to_s.start_with?(Bundler.bundle_path.to_s) && c.to_s.start_with?(Rails.root.to_s) end

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DBMMFSΛه࿥͢Δ ࡶʹϩάΛཷΊࠐΊΔπʔϧɾαʔϏεΛ࢖͏ ʮϨεϙϯεʹӨڹΛ༩͑ͳ͍ʯ͸ॏཁ ͍͍ײ͡ʹCVGGFSJOHͨ͠ΓඇಉظͰσʔλૹͬͯ͘ΕΔ܅Λ͔ͭ͏ fluent-logger-ruby td-logger-ruby FUD Ұ࣌తͳϩάऩूͳͷͰɼਖ਼͠͞खܰ͞ɾརศੑେ੾ͳ͜ͱͳͷͰʢ͈́ ƁŞƄŪžUJQT

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DBMMFSΛه࿥͢Δ ࡶʹϩάΛཷΊࠐΊΔπʔϧɾαʔϏεΛ࢖͏ ʮϨεϙϯεʹӨڹΛ༩͑ͳ͍ʯ͸ॏཁ ͍͍ײ͡ʹCVGGFSJOHͨ͠ΓඇಉظͰσʔλૹͬͯ͘ΕΔ܅Λ͔ͭ͏ qVFOUMPHHFSSVCZ UEMPHHFSSVCZ FUD Ұ࣌తͳϩάऩूͳͷͰɼਖ਼͠͞खܰ͞ɾརศੑେ੾ͳ͜ͱͳͷͰʢ͈́ ƁŞƄŪžUJQT caller_app = caller.find do |c| !c.to_s.start_with?(Bundler.bundle_path.to_s) && c.to_s.start_with?(Rails.root.to_s) end TD.event.post("hoge_log", { caller_app: caller_app, request_controller: Tread.current[:request_controller], request_action: Tread.current[:request_action], # sinp. }) Կ΋ߟ͑ͣʢUFTUBCJMJUZʹӨڹΛ༩͑ͣʣɼࡶʹϩά౤͛ΒΕΔͷ͸3VCZ͔ͩΒͦ͜

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DBMMFSΛه࿥͢Δ ࡶʹϩάΛཷΊࠐΊΔπʔϧɾαʔϏεΛ࢖͏ ʮϨεϙϯεʹӨڹΛ༩͑ͳ͍ʯ͸ॏཁ ͍͍ײ͡ʹCVGGFSJOHͨ͠ΓඇಉظͰσʔλૹͬͯ͘ΕΔ܅Λ͔ͭ͏ qVFOUMPHHFSSVCZ UEMPHHFSSVCZ FUD Ұ࣌తͳϩάऩूͳͷͰɼਖ਼͠͞खܰ͞ɾརศੑେ੾ͳ͜ͱͳͷͰʢ͈́ ƁŞƄŪžUJQT class ActiveRecrod::Relation def eager_loading? super.tap do |loading| if loading # send logs end end end 3VCZͳͷͰܭଌ༻ίʔυ͸Ͳ͜ʹͰ΋࢓ࠐΊΔ ʢ˞༻͕ࡁΜͩΒফ͠·͠ΐ͏ʣ

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ίʔυͷมߋൣғΛ࠷খʹཹΊΔ Ϛϝʹຊ൪ʹग़͢ ෳࡶͳͱ͜Ζ͸࡟Εͳ͍͔ৄ͍͠ਓʹฉ͘ Ͳ͏΍ͬͯ͢͢ΊΔʁ

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ίʔυͷมߋൣғΛ࠷খʹཹΊΔ ΞϓϦ͕σΧ͘ͳΔͱ໢ཏతʹมߋ͢Δͷ͸େม FH%#෼ׂͰAProfileA͕AProfileDb::ProfileAʹͳΓ·͢ͱ͔มߋྔଟ͗ͯ͢ແཧ ϕʔεΫϥεΛม͑ΔʢAApplicationRecordAAProfileRecordAʣͱ͔ͳΒ·ͩΘ͔Δ ӨڹൣғΛࡶʹ೺Ѳ͢ΔͷʹΫϥεਤॻ͘ͱศར Ϛϝʹຊ൪ʹग़͢ ෳࡶͳͱ͜Ζ͸࡟Εͳ͍͔ৄ͍͠ਓʹฉ͘ Ͳ͏΍ͬͯ͢͢ΊΔʁ

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ίʔυͷมߋൣғΛ࠷খʹཹΊΔ Ϛϝʹຊ൪ʹग़͢ Ұؾʹ΍ΔͱյΕͨͱ͖ʹݪҼڀ໌͕େม ෳࡶͳͱ͜Ζ͸࡟Εͳ͍͔ৄ͍͠ਓʹฉ͘ Ͳ͏΍ͬͯ͢͢ΊΔʁ

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ίʔυͷมߋൣғΛ࠷খʹཹΊΔ Ϛϝʹຊ൪ʹग़͢ ෳࡶͳͱ͜Ζ͸࡟Εͳ͍͔ৄ͍͠ਓʹฉ͘ ͨ·ʔʹʮ͜ΜͳΜઈରແཧ΍Ζ͆ʯΈ͍ͨͳͷ͕͋Δ ΊͬͪΌ"SFM͝ʹΐ͝ʹΐͯ͠Δͱ͔ɼΞϓϦͷίΞʹΊͬͪΌґଘͯ͠Δͱ͔ ͦ͏͍͏ͷ͸ͦ΋ͦ΋࢓༷Λ࡟Εͳ͍͔ɾଞͷ࣮૷͕ͳ͍͔ߟ͑Δ υϝΠϯʹৄ͍͠ਓʹ΍ͬͯ΋Β͏ͷ͕٢ Ͳ͏΍ͬͯ͢͢ΊΔʁ

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͍ͪ͹ΜॏཁͳϙΠϯτ ʢݸਓతʹʣ

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੎͍ͱے೑Ͱԡ͠੾Δ ௕ظઓʹͳΔͱ৺͕ંΕͦ͏ʹͳΔ ˞͜ͷͱ͖ʢ%#෼ׂʣ͸਺೔Ͱڧߦಥഁͨ͠ͷͰ͔͢ΓইͰࡁΜͩ