アスペクト指向によるアプリケーション拡張

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ΞεϖΫτࢦ޲ʹΑΔ ΞϓϦέʔγϣϯ֦ு yuuki.takezawa / ytake PHP conference kansai 2016

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Agenda • OOPɺίϯϙʔωϯτʹΑΔ։ൃͷ࢟ • ΞεϖΫτࢦ޲͓͞Β͍ • ԣஅతͳؔ৺ࣄ ࣮ફͷώϯτ

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OOPɺίϯϙʔωϯτʹΑΔ։ൃ

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ϓϩάϥϜ͸Ͳ͏͋Δ΂͖͔ʁ • ίϯϙʔωϯτΛϕʔεʹγεςϜΛߏங͍ͯ͘͠Ұൠ తͳύλʔϯ • ΫϥεɺύοέʔδɺαʔϏεͳͲͷίϯϙʔωϯτʹ  ཁٻΛׂΓ౰ͯͯߟ͑Δ • େମͷύλʔϯͰ͸ޮՌతʹίϯϙʔωϯτͱͯ͠࡞༻ • ޮՌతͰ͸ͳ͍ύλʔϯͱ͸ɺଞͷίϯϙʔωϯτʹ ӨڹΛ༩͑ͯ͠·͏΋ͷ͕෼཭Ͱ͖ͳ͍ύλʔϯͰ͋Γɺ େ͖ͳΞϓϦέʔγϣϯʹͳΕ͹ͳΔ΄Ͳ໰୊ʹ

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ίϯϙʔωϯτ

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database logger cache middleware request response conﬁg

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ίϯϙʔωϯτ • ࣗ਎ͷ࣋ͭ಺༰͕ΧϓηϧԽ͞ΕɺӅṭ͞Ε͍ͯΔ • ίϯϙʔωϯτͷத਎Λ஌Δඞཁ͸ͳ͍ • ΠϯλʔϑΣʔεΛհͯ͠Ԡ౴͕ಘΒΕΕ͹ྑ͍ • ΠϯλʔϑΣʔεʹมߋ͕͋ͬͯ΋ɺಛఆͷ΋ͷ͚ͩʹ มߋ͕ՃΘΔ͚ͩͰྑ͍(ந৅ʹґଘ͍ͯ͠Δ΋ͷ)

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ίϯϙʔωϯτʹΑΔΞϓϦέʔγϣϯߏங

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͋ΔΞϓϦέʔγϣϯͷྫ

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ސ٬ը໘ ঎඼༧໿ ༧໿ ελοϑ ঎඼ొ࿥ औѻఀࢭ ঎඼

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γεςϜߏஙྫ • ސ٬ը໘ɺελοϑίϯϙʔωϯτ͸  ৘ใΛࣔ͠ɺೖྗΛड͚෇͚Δ • ঎඼༧໿ɺ঎඼ొ࿥ɺऔѻఀࢭ͸  ۀ຿ϩδοΫͱ੍ޚϩδοΫΛΧϓηϧԽ • ༧໿ɺ঎඼͸σʔλετΞʹ͋Δ৘ใΛอ࣋ • ͦΕͧΕͷίϯϙʔωϯτ͸ɺ໾ׂɺ੹຿Λ෼཭͠  Ͳ͔͜ʹมߋ͕͋ͬͨ৔߹ʹ͓͍ͯ΋ɺ  ద༻ੑͷߴ͍γεςϜߏங͕Ͱ͖Δ

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ίϯϙʔωϯτͷݶքͱؔ৺ࣄ

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ؔ৺ࣄͱ͸ • ϓϩάϥϜͷ͋Δػೳ΍ৼΔ෣͍ɺ໨త • ར֐ؔ܎ऀ͕ؔ৺Λ࣋ͭ͋ΒΏΔ΋ͷ • ར֐ؔ܎ؔ܎ऀͱ͸  ΤϯυϢʔβʔɺεϙϯαʔɺ։ൃऀ  ·ͨ͸ػೳཁٻɺઃܭ੍໿ͳͲ෯޿͍΋ͷ • Ωϟογϡ΍σʔλͷόοϑΝͳͲͷؔ৺ࣄ΋  ར֐ؔ܎ऀͰ͋Δͱ͍͑Δ • ໰୊Λ෼ղͯ͠খ͘͢͞Δ͜ͱΛɺ  ؔ৺ࣄͷ෼཭ͱ͍͏

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ؔ৺ࣄͷ෼཭ • ͞·͟·ͳؔ৺ࣄΛͳΜΒ͔ͷϞδϡʔϧͱͯ͠෼཭͠ɺ ֤ϞδϡʔϧΛ։ൃΛ͓͜ͳ͏ͷ͕ཧ૝ • ͜ΕΒΛߏ੒ͯ͠ɺ׬શͳγεςϜΛੜΈग़͢ • ؔ৺ࣄͷ෼཭ͱϞδϡʔϧԽ͸ɺ  ίΠϯͷදཪͷΑ͏ͳؔ܎Ͱ͋Γɺ  ؔ৺ࣄΛϞδϡʔϧͱͯ͠෼཭͠ɺ  Ϟδϡʔϧ͸ؔ৺ࣄͷղܾͱ࣮૷Λ୲౰͢Δؔ܎

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෼཭ͷλΠϛϯά • ؔ৺ࣄͷ෼཭͸ɺγεςϜߏஙͷૣ͍ஈ֊Ͱ։͍࢝ͯ͠ ͳ͚Ε͹ͳΒͳ͍ • υϝΠϯϞσϧͷ࡞੒࣌΍ɺΫϥεઃܭ࣌ͳͲɺ  ૣ͚Ε͹ૣ͍΄Ͳྑ͍͸ͣ • ؔ৺ࣄ͸෼཭͞ΕͨଞͷίϯϙʔωϯτͰ࣮ݱͰ͖Δ ΋ͷ΋͋Δ

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ίϯϙʔωϯτʹΑΔղܾ͕೉͍͠΋ͷ • ॲཧʹ൐͏ϩΪϯάɺ෼ࢄॲཧɺτϥϯβΫγϣϯͳͲ  ΞϓϦέʔγϣϯͷج൫తͳؔ৺ࣄ • ػೳཁ݅ʹ൐͏ɺϢʔεέʔεʹΑΔؔ৺ࣄ • ࢓༷௥ՃʹΑΔෳࡶԽ͢ΔΞϓϦέʔγϣϯͳͲ • ͜ΕΒΛԣஅతͳؔ৺ࣄͱݺͿ

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֦ுͷ෼཭ෆೳ

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֦ுͷ෼཭ෆೳͱ͸ • ֦ுͱ͸ɺج൫ͷ্ʹఆٛ͞ΕΔ΋ͷͰɺ  ௥ՃαʔϏε΍ػೳΛද͢ • ྫ͑͹ɺ  ঎඼༧໿ʹΩϟϯηϧ଴ͪϦετ͕ඞཁͳ৔߹  ঎඼༧໿ͷ֦ுͱͳΔ • ෳࡶͳ໰୊Λཧղ͢ΔͨΊͷٕ๏ͳͷͰɺ  ։ൃ࣌ʹ࣮ࡍʹಋೖͯ͠ΈΔͱྑ͍Ͱ͢

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࣮ݱྫ • Ωϟϯηϧ଴ͪϦετίϯϙʔωϯτͷ࡞੒ • ঎඼༧໿ίϯϙʔωϯτʹɺ  Ωϟϯηϧ଴ͪ΁ͷ઀ଓɺίʔϧΛ௥Ճ

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Ωϟϯηϧ଴͕ͪෳࡶʹͳΔཧ༝ • ػೳ௥Ճ͞ΕΔલʹඞཁͰ͸ͳ͔ͬͨ΋ͷ͕௥Ճ • அยԽ͞ΕͨίʔυΛάϧʔίʔυɺ  ͜ͷΑ͏ͳมߋΛׂΓࠐΈͱݺͿ • ܾࡁํ๏௥ՃͳͲ΋͜͏͍ͬͨάϧʔίʔυ͕ඞཁʹͳ Δͱ༧૝͞ΕΔ • ػೳ௥Ճͷ౓ʹಉ༷ͷίʔυ͕૿͑Δͱɺ  ཧղ͠ʹ͘͘ͳΔ • ඇৗʹ͏·͘ઃܭ͞ΕͨγεςϜҎ֎͸ɺ֦ுϙΠϯτ Λݟ͚ͭΔ͜ͱ͸೉͍͠ͱ͍͑Δ

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ίϯϙʔωϯτͷݶք

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ΞεϖΫτΛ༻͍ͨղܾΛߟ͑Δ

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ΞεϖΫτࢦ޲ͱ͸

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Aspect Oriented Programming • OOPʹ୅ΘΔ΋ͷͰ͸ͳ͘ɺॊೈੑΛ࣋ͨͤΔ  ϓϩάϥϛϯάύϥμΠϜ • separation of concerns ʢؔ৺ࣄͷ෼཭ʣ • ΞεϖΫτࢦ޲Λཧղ͢ΔͨΊʹ͢΂͖͜ͱ͸ɺ  ΦϒδΣΫτࢦ޲Λ·ͣ஌Δ͜ͱ

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ΞεϖΫτઐ໳༻ޠ • Weave(΢Οʔϒ)  ΞεϖΫτΛద༻͢Δ͜ͱ • δϣΠϯϙΠϯτ  ΞεϖΫτΛ΢Οʔϒ͢ΔϙΠϯτ • ϙΠϯτΧοτ  δϣΠϯϙΠϯτΛ·ͱΊͨఆٛ • ΞυόΠε  ΢Οʔϒ͢ΔΞεϖΫτͷॲཧఆٛ

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δϣΠϯτϙΠϯτ • ͲͷΫϥεͷΠϯελϯε͕ੜ੒͞Εͨ࣌ • ͋ΔΫϥεͷಛఆͷϝιου͕࣮ߦ͞Εͨ࣌ • ͋ΔΫϥεͷϝιουͷ͏ͪಛఆͷϓϨϑΟοΫε͕෇ ͍͍ͯΔ΋ͷ͕࣮ߦ͞Εͨ࣌ • ͋ΔΫϥεΛܧঝͨ͠Ϋϥε͕࣮ߦ͞ΕΔ࣌    ͳͲͳͲ  *஫ҙ DIίϯςφͰղܾ͞ΕΔ΋ͷͰ͸ͳ͍

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ϙΠϯτΧοτ • call  ϝιουͷݺͼग़͠ɺίϯετϥΫλݺͼग़͠ • execution  ϝιου࣮ߦɺίϯετϥΫλ࣮ߦ • handler  ྫ֎ॲཧ • adviceexecution  ΞυόΠε࣮ߦ

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ΞυόΠε • before   δϣΠϯϙΠϯτൃੜલʹద༻ • after  δϣΠϯϙΠϯτൃੜޙʹద༻ • around  ݩͷॲཧΛஔ͖׵͑ͯ͠·͏৔߹΍ɺ  ಛఆͷॲཧͰڬΈࠐΉ ᷖճॲཧ(go around)

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ΞεϖΫτʹΑΔ֦ுͷ෼཭

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঎඼༧໿ػೳͷྫ

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঎඼༧໿ • ༧໿Մೳ਺Λ௒ա͍ͯ͠Ε͹ɺ  γεςϜͰ͸༧໿͕Ͱ͖ͳ͍ɺͱͯ͠ϝοηʔδग़ྗ • ༧໿ՄೳͰ͋Ε͹ɺγεςϜͰ͸༧໿Λ࡞੒

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makeReservation ߪೖՄೳݸ਺ͳ͠ ༧໿࡞੒

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/** * @param $id * * @return mixed * @throws \Exception */ public function makeReservation($id) { if ($this->reserve->getQuantity($id)) { return $this->reserve->createReservation($id); } throw new \NoStockException(); }

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঎඼༧໿(֦ு) • ೝՄ͞ΕͨϢʔβʔͷΈ͕༧໿Մೳͱ͢Δ • ༧໿Մೳ਺௒աͷ৔߹͸ɺ  Ωϟϯηϧ଴ͪϦετ΁௥Ճ  • ৼΔ෣͍Λ֦ு͢΂͖֦ுϙΠϯτΛࣝผ͢Δ • ௥ՃͷৼΔ෣͍Λఆٛ͢Δ

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makeReservation ೝՄΤϥʔ ༧໿࡞੒ Ωϟϯηϧ଴ͪ΁

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/** * @param $id * @WaitingList * @return mixed * @throws \Exception */ public function makeReservation($id) { if ($this->reserve->getQuantity($id)) { return $this->reserve->createReservation($id); } throw new \NoStockException(); }

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/** * @param MethodInvoke $invoke * * @return object * @throws \Exception */ public function __invoke(MethodInvoke $invoke) { try { $result = $invoke->proceed(); }catch(\NoRoomException $e) { // Ωϟϯηϧ଴ͪϦετ΁ͷ௥Ճॲཧ } return $result; }

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঎඼༧໿(֦ுྫ) • ྫͰ͸ɺ֦ுʹΑΔ΋ͭΕ߹͍Λൃੜͤͣ͞ʹɺ  ৼΔ෣͍Λ௥Ճ͍ͯ͠·͢ɻ • ։ൃऀ͔ΒΈΔͱ࣮૷ίʔυʹΑΔมߋ͸ͳ͘ɺ  ֦ு͸෼཭͞Ε͍ͯΔͱݴ͑Δঢ়ଶʹ͋Δ • ΞεϖΫτ͸ෳ਺ͷૢ࡞Λ֦ு͢Δ͜ͱ͕Ͱ͖·͢ɻ

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ར֐ؔ܎ऀͷؔ৺ࣄΛཧղ

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঎඼ߪೖɾ༧໿γεςϜγεςϜ ϑΟʔνϟʔચ͍ग़͠

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঎඼ߪೖɾ༧໿γεςϜ • ސ٬͸঎඼Λ༧໿Ͱ͖Δ • ελοϑ͸঎඼ొ࿥ɺऔΓѻ͍ఀࢭΛૢ࡞Ͱ͖Δ • ؅ཧऀ͸ඪ४Ձ֨ͱظؒݶఆηʔϧͷઃఆ͕Ͱ͖Δ • ϝϯόʔձһ͸ɺϙΠϯτΛஷΊͯࢧ෷͍ʹར༻Ͱ͖Δ • ήετɺ๏ਓɺϝϯόʔձһͱ͍͏ސ٬λΠϓΛऔΓѻ͏ • γεςϜ͸web͔Βར༻Ͱ͖Δඞཁ͕͋Δ • γεςϜ͸RDBMSΛར༻ͯ͠σʔλΛอ࣋͢Δ • ؂ࠪͷͨΊɺ͢΂ͯͷॲཧ͸ϩάʹग़ྗ͢Δ  etc…

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ΞϓϦέʔγϣϯϢʔεέʔε

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঎඼༧໿ Ωϟϯηϧ଴ͪ ϙΠϯτ֫ಘͱར༻ ঎඼ߪೖ ঎඼Ձ֨ઃఆ ݶఆηʔϧՁ֨ઃఆ extend extend extend

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ϢʔεέʔεʹΑΔΞεϖΫτͷࣝผ • Ϣʔεέʔε͸࣮ݱ͢Δʹ͋ͨΓɺ  ෳ਺ͷΫϥεɺίϯϙʔωϯτʹލΔԣஅతͳؔ৺ࣄ • ސ٬λΠϓʹӨڹΛड͚ͯɺ༷ʑͳϑϩʔ͕ੜ·ΕΔ  ސ٬λΠϓผͷϙΠϯτ΍ɺ  Ωϟϯηϧ଴ͪ༏ઌ౓ͳͲ΋͋Δ͔΋͠Ε·ͤΜ • ͜ΕΒ͸ԣஅతͰɺ֦ுϢʔεέʔεͱͳΔ

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ϙΠϯτ࢒ߴ֬ೝ ϙΠϯτͰࢧ෷͏ ϙΠϯτ֫ಘ ϙΠϯτ֫ಘͱར༻ ঎඼ߪೖ extend after Advice around Advice

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·ͱΊ • ར֐ؔ܎ऀΛཧղ • ༏Εͨઃܭ͸ɺਖ਼͍͠࢓༷ཧղ͔Β • ԣஅతؔ৺ࣄΛࣝผ͠ɺॊೈੑͷߴ͍ϓϩάϥϜ΁ • OOPʹ୅ΘΔ΋ͷͰ͸ͳ͍ • Java͚ͩͰ͸ͳ͍ʂ