Bloc PatternにおけるBloc分割の方針と実践例 / Division plan and practical example in bloc pattern

by Kazuki YAMAGUCHI

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,B[VLJ:BNBHVDIJZBNBSL[ 'MVUUFS.FFUVQ #MPD1BUUFSOʹ͓͚Δ#MPD෼ׂͷํ਑ͱ࣮ફྫ (MPCBM#MPD-PDBM#MPD$PNQPOFOU#MPD5FNQMBUF#MPD

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!ZBNBSL[,B[VLJ:BNBHVDIJ 4FSWFS.PCJMF"QQ&OHJOFFS!)PVTNBSU JOD

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࿩͢͜ͱ ෼ 'MVUUFSͰ։ൃ͢Δʹ͋ͨͬͯར༻ͨ͠#MPD1BUUFSOʹ͓͚Δɺ ࣮૷ύλʔϯͷಛ௃ͱ෼ྨɺͦͯ͠#MPDͷ෼ׂͰܾΊͨํ਑Λ঺հ͠·͢

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࿩ͷ୊ࡐΧ΢ϧ ɾ݄த०ʹ'MVUUFS੡ͷΞϓϦΛϦϦʔε ϦϓϨΠε ɾ։ൃظؒ͸ि ɾ#MPD1BUUFSOͱ3Y%BSUΛ࠾༻ ɾ࡞ΒΕͨ#MPDͷ਺͸ݸ ɾϦϓϨΠεͷ࿩͸OPUFʹॻ͖·ͨ͠

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ɾ݄த०ʹ'MVUUFS੡ͷΞϓϦΛϦϦʔε ϦϓϨΠε ɾ։ൃظؒ͸ि ɾ#MPD1BUUFSOͱ3Y%BSUΛ࠾༻ ɾ࡞ΒΕͨ#MPDͷ਺͸ݸ ɾϦϓϨΠεͷ࿩͸OPUFʹॻ͖·ͨ͠ ࿩ͷ୊ࡐΧ΢ϧ ɾ࡞ΒΕͨ#MPDͷ਺͸ݸ ଟ͍ʁগͳ͍ ͜ͷݸͷ੗Έ෼͚ͱಛ௃͕ࠓճͷ࿩ͷओ୊Ͱ͢

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#MPD1BUUFSOΛద༻ͨ͜͠ͱͰݟ͑ͨͭͷ෼ׂํ਑

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ΞϓϦέʔγϣϯશମʹؔΘΔॲཧΛͭʹ·ͱΊΔ εΫϦʔϯ͚ͩͰར༻͢ΔॲཧΛͭʹ·ͱΊΔ ίϯϙʔωϯτͰར༻͢ΔॲཧΛͭʹ·ͱΊΔ ڞ௨Ͱར༻͢ΔॲཧΛͭʹ·ͱΊΔ #MPD1BUUFSOΛద༻ͨ͜͠ͱͰݟ͑ͨͭͷ෼ׂํ਑

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ΞϓϦέʔγϣϯશମʹؔΘΔॲཧΛͭʹ·ͱΊΔ εΫϦʔϯ͚ͩͰར༻͢ΔॲཧΛͭʹ·ͱΊΔ ίϯϙʔωϯτͰར༻͢ΔॲཧΛͭʹ·ͱΊΔ ڞ௨Ͱར༻͢ΔॲཧΛͭʹ·ͱΊΔ #MPD1BUUFSOΛద༻ͨ͜͠ͱͰݟ͑ͨͭͷ෼ׂํ਑ ΞϓϦέʔγϣϯશମʹ εΫϦʔϯ͚ͩͰ ίϯϙʔωϯτͰ ڞ௨Ͱ ํ਑ͷҧ͍͸είʔϓͷ޿͞

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ΞϓϦέʔγϣϯશମʹؔΘΔॲཧΛͭʹ·ͱΊΔ εΫϦʔϯ͚ͩͰར༻͢ΔॲཧΛͭʹ·ͱΊΔ ίϯϙʔωϯτͰར༻͢ΔॲཧΛͭʹ·ͱΊΔ ڞ௨Ͱར༻͢ΔॲཧΛͭʹ·ͱΊΔ #MPD1BUUFSOΛద༻ͨ͜͠ͱͰݟ͑ͨͭͷ෼ׂํ਑ ͳͥɺ͜ͷ੗Έ෼͚͕ྑ͍ͷ͔ʁ

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ͳͥɺ͜ͷ੗Έ෼͚͕ྑ͍ͷ͔ʁ ͭͷओͳཧ༝ ΞϓϦɺεΫϦʔϯɺίϯϙʔωϯτͱ͍͏6*ߏ଄Λ࣠ʹॲཧ͕·ͱ·ΔͨΊɺ ߏ଄͕୯७ͰΘ͔Γ΍͘͢ͳΔ ϑΝΠϧ਺͸૿͑΍͍͕͢ɺϑΝΠϧ͋ͨΓͷίʔυྔ͸ݮΔ είʔϓͷൣғ͕໌֬ʹఆ·ͬͨ#MPDΛ࡞ΔͨΊɺ#MPDࣗମ͕ૄ݁߹ʹͳΔɻ ݁Ռͱͯ͠ɺอकੑ͕ߴ͘ͳΓɺಡΈ΍͍͢ɺཧղ͠΍͍͢ɺมߋ͠΍͍͢ͱ͍ͬ ͨঢ়گʹͳΔ #MPDͷ࣮૷ࣗମ͕ߏ଄Խ͞ΕΔ͜ͱʹΑΓɺอकੑ্͕͕Δ

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(MPCBM#MPD-PDBM#MPD$PNQPOFOU#MPD5FNQMBUF#MPD ෼ׂํ਑ͷఆٛʹΑͬͯੜ·Εͨɺ#MPDͷ෼ྨ

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(MPCBM#MPD ɾΞϓϦ୯ҐͰɺ޿͍ൣғʹؔΘΔॲཧΛ·ͱΊΔ FYೝূॲཧ ΠϕϯτετϦʔϜΛଞ#MPDʹ఻೻͢Δॲཧ -PDBM#MPD ɾεΫϦʔϯ୯ҐͰɺݶΒΕͨڱ͍ൣғʹؔΘΔॲཧΛ·ͱΊΔ FYඳը͢Δσʔλͷऔಘॲཧ ϦϩʔυͳͲͷը໘୯ҐͰߦΘΕΔॲཧ $PNQPOFOU#MPD ɾίϯϙʔωϯτ୯ҐͰɺݶΒΕͨ෦෼ʹؔΘΔॲཧΛ·ͱΊΔ FYϢʔβʔΞΫγϣϯ͕ൃੜ͢Δॲཧ ͓ؾʹೖΓ ࡟আ 5FNQMBUF#MPD ɾڞ௨ͷॲཧ୯ҐͰɺݶΒΕͨڱ͍ൣғʹؔΘΔॲཧΛ·ͱΊΔ FYೝূॲཧ ྨࣅը໘ͷྨࣅॲཧ ෼ׂํ਑ͷఆٛʹΑͬͯੜ·Εͨɺ#MPDͷ෼ྨ

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(MPCBM#MPD ΞϓϦ୯ҐͰ޿͍ൣғʹؔΘΔॲཧΛ·ͱΊΔ "QQ 4DSFFO 4DSFFO 4DSFFO 4DSFFO #MPD

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͓ؾʹೖΓը໘ ҟͳΔը໘ͷڞ௨ͷॲཧ πʔϧνοϓ Λɺ ಉҰͷ(MPCBM#MPDΛࢀর੍ͯ͠ޚ͍ͯ͠Δ (MPCBM#MPD ϗʔϜը໘ πʔϧνοϓͷදࣔ৚݅Λ੍ޚ͢Δ #MPDΛڞ௨Ͱࢀর

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"QQ 4DSFFO 4DSFFO 4DSFFO 4DSFFO #MPD εΫϦʔϯ୯ҐͰݶΒΕͨڱ͍ൣғʹؔΘΔॲཧΛ·ͱΊΔ -PDBM#MPD

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ϩάΠϯը໘ ɾαΠϯΠϯॲཧ ɾϩάΠϯॲཧ ɾ(PPHMFϩάΠϯॲཧ ɾ'BDFCPPLϩάΠϯॲཧ ɾϝʔϧΞυϨεͷόϦσʔτॲཧ ɾύεϫʔυͷόϦσʔτॲཧ ɾύεϫʔυͷද੍ࣔޚॲཧ ಛఆͷը໘ͷΈͰར༻͢Δॲཧ ϩάΠϯϩάΞ΢τ Λ੍ޚ͢Δ -PDBM#MPD

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$PNQPOFOU#MPD ίϯϙʔωϯτ୯ҐͰ෦෼తʹؔΘΔॲཧΛ·ͱΊΔ 4DSFFO $PNQPOFOU $PNQPOFOU $PNQPOFOU $PNQPOFOU #MPD

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͓ؾʹೖΓը໘ ϗʔϜը໘ $PNQPOFOU#MPD ҰݟҟͳΔ6*ߏ଄ Χʔυܕ ϦετΞΠςϜܕ ʹݟ͑Δ

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$PNQPOFOU#MPD $POE$BSE#MPD Λ࠶ར༻͍ͯ͠Δ ͔͠͠ɺഎޙͰར༻͍ͯ͠Δ#MPD͸ಉҰͷ΋ͷ ڞ௨ॲཧͷ࠶ར༻ ϗʔϜը໘ ͓ؾʹೖΓը໘

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5FNQMBUF#MPD 4DSFFO 5NQ #MPD #MPD #MPD 4DSFFO 4DSFFO ڞ௨ར༻͢Δॲཧ୯ҐͰڱ͍ൣғʹؔΘΔॲཧΛ·ͱΊΔ ܧঝ֦ͯ͠ு ϓϨʔϯʹར༻

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8FC7JFXͱͯ͠ͷجຊػೳ͸ಉ͡ͳͷͰɺಉҰͷ#MPDΛར༻͢Δ͕ɺ ֦ுػೳ͕ཉ͍͠৔߹ʹɺ#MPDࣗମΛܧঝͯ͠࠶ར༻ͭͭ͠ػೳ௥Ճ͢Δ #MPDΛܧঝ͠ɺ ػೳ֦ு͍ͯ͠Δ 1MBJOͳ#MPDΛ ͦͷ··ར༻͍ͯ͠Δ 5FNQMBUF#MPD ࣋ͪࠐΈը໘ αʔϏε֓ཁը໘

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ΞϓϦέʔγϣϯશମʹؔΘΔॲཧΛͭʹ·ͱΊΔ εΫϦʔϯ͚ͩͰར༻͢ΔॲཧΛͭʹ·ͱΊΔ ίϯϙʔωϯτͰར༻͢ΔॲཧΛͭʹ·ͱΊΔ ڞ௨ར༻͢ΔॲཧΛͭʹ·ͱΊΔ #MPD1BUUFSOΛద༻ͨ͜͠ͱͰݟ͑ͨͭͷ෼ׂํ਑

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l࡞ΒΕͨ#MPDͷ਺͸ݸzଟ͍ গͳ͍ʁ

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l࡞ΒΕͨ#MPDͷ਺͸ݸzଟ͍ গͳ͍ʁ ݸਓతʹ͸ɺ͜Μͳ΋ͷ͔ͳͱ͍͏ײ͡ɻ ࠓͷͱ͜Ζ։ൃӡ༻తʹ͸ಛʹෆ౎߹Λײͯ͡ͳ͍Ͱ͕͢ɺ ΋͔ͨ͠͠Βকདྷతʹɺ՝୊ʹײ͡Δ͜ͱ͕ग़Δ͔΋ʜ

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·ͱΊ ɾҰॏʹ#MPD1BUUFSOͱݴ͑Ͳɺѻ͍ํ͸༷ʑଘࡏ͢Δ ɾ(MPCBM -PDBM $PNQPOFOU 5FNQMBUFͦΕͧΕͷ࢖͍ํΛݟۃΊͯѻ͏ ɾείʔϓͷ໌֬Խɺߏ଄ԽʹΑΓɺอकੑͷߴ͍ΞϓϦέʔγϣϯ։ൃ͕ՄೳʹͳΔ #MPD1BUUFSOࣗମͷద༻Λԣͷߏ଄Խ 6*ͱϩδοΫͷ෼཭ ͩͱ͢ΔͳΒɺ #MPDͷ࣮૷ύλʔϯΛద༻͢Δ͜ͱ͸ɺॎͷߏ଄Խ είʔϓʹΑΔϩδοΫ෼཭

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͝੩ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ