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ドメイン駆動設計 第一部まとめ
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Go Tanaka
September 08, 2016
Programming
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ドメイン駆動設計 第一部まとめ
エリックエヴァンスのDDD本の第一部のまとめ(感想)
Go Tanaka
September 08, 2016
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Transcript
υϝΠϯۦಈઃܭ ୈ1෦·ͱΊ
ϞσϧͱԿ͔ • ໘ͷΛղܾ͢Δ্Ͱؔ࿈͢Δଆ໘ΛநԽ͠ɺɹ ͦΕҎ֎ͷཁૉΛແࢹͨ͠ݱ࣮ʹର͢Δͻͱͭͷղऍ • ιϑτΣΞͱ • ϢʔβͷԿΒ͔ͷ׆ಈؔ৺ࣄͱ͕ؔ͋Δ • Ϣʔβ͕ϓϩάϥϜΛద༻͢ΔྖҬ͕ιϑτΣΞ
ͷυϝΠϯ
ϞσϧͱԿ͔ ݱ࣮ੈք ׆ಈɾؔ৺ࣄ ׆ಈɾؔ৺ࣄ Ϟσϧ Ϟσϧ ؆ུԽɾநԽ ιϑτΣΞ ͷྖҬ
ϞσϦϯά • υϝΠϯϞσϦϯάͱϞσϧΛͰ͖Δ͚ͩ ʮ࣮ࣸతʹʯ࡞͢Δ͜ͱͰͳ͍ • ͋Δతʹैͬͯݱ࣮ͷ֓ཁΛදݱ͢Δ • ͜ͷ࡞ۀΛϞσϦϯάͱݺͿ
ͲͷΑ͏ʹϞσϧΛબ͢Δ͔ 1. Ϟσϧͱઃܭͷ֩৺͕૬ޓʹؔ࿈͠߹͏͜ͱ 2. νʔϜϝϯόશһ͕༻͢Δڞ௨ͷݴޠج൫Ͱ ͋Δ͜ͱ 3. ৠཹ͞ΕͨࣝͰ͋Δ͜ͱ
Ͳ͔͜Β࢝ΊΔ͔ʁ • ࣝΛ͔Έࡅ͘ͱ͜Ζ͔Β ”ΫϥΠΞϯτυϝΠϯΤΩεύʔτͱҰॹʹ͠߹͍ͳ͕Β ΦϒδΣΫτͷ૬ޓ࡞༻ਤΛඳ͍ͨΓͨ͠” ”༻ޠ๏ʹ͋ͬͨෆҰக͍͋·͍͞ɺٕज़తͳݟղͷ૬ҧΛҰ ॹʹͳͬͯղֶܾ͠ΜͰ͍ͬͨ” “ͦͷ݁ՌɺࣄΛΑΓݫີʹໃ६ͳ͘આ໌Ͱ͖ΔΑ͏ʹͳͬͨ"
ܧଓతֶश • ܧଓతֶश ෆՄܽ • υϝΠϯϞσϧͷεΩϧ • ٕज़తͳࣝͷ্ • ͍·औΓΜͰ͍Δ۩ମతͳυϝΠϯʹ͍ͭ
ֶͯश͢Δ
ϢϏΩλεݴޠ • ڞ௨ݴޠͷͳ͍ϓϩδΣΫτ • ʑͷٞͰ͏༻ޠ๏͕ɺίʔυʹຒΊࠐ·Ε Δ༻ޠ๏͔ΒΓ͞ΕΔ • ௨༁͕ඞཁʹͳΔ • Ϟσϧͷ֓೦Λࠞཚͤͯ͞͠·͏
• ίʔυͷഁյతͳϦϑΝΫλϦϯάʹͭͳ͕Δ
ϢϏΩλεݴޠ • ։ൃऀͷؒͰ༻͞Εͳ͚ΕͳΒͳ͍ • ݴޠΛ͏্Ͱ͕͋ΕɺΘΓͷදݱΛ༻͍ ࣮ͯݧ͢Δ • ݴޠʹର͢ΔมߋɺυϝΠϯϞσϧʹର͢Δมߋ • ίʔυͷΫϥεϝιουͷ໊લΛม͑ͨΓ;
Δ·͍Λมߋͨ͠Γ͢Δ͜ͱʹͭͳ͕Δ
υΩϡϝϯτͱਤ • ϞσϧਤͰͳ͍ • ਤ͕දݱ͍ͯ͠Δͷߟ͑ํͷࠎ֨ • ઃܭʹؔ͢Δຊ࣭తͳৄࡉɺίʔυʹ͓͍ͯͱΒ͑ΒΕΔ • υΩϡϝϯτίʔυձͷදݱΛิΘͳ͚Ε͍͚ͳ͍ •
ίʔυͰදݱͰ͖͍ͯΔͷΛυΩϡϝϯτͰ͢Δ͖Ͱ ͳ͍ • υΩϡϝϯτৗʹ࠷৽ͰϓϩδΣΫτͷ׆ಈʹऔΓࠐ·Ε͍ͯͳ ͚ΕͳΒͳ͍ʢϓϩδΣΫτͷ׆ಈͷҰ෦Ͱ͋Δ͜ͱʣ
Ϟσϧͱ࣮Λ݁ͼ͚ͭΔ • Ϟσϧۦಈઃܭ • ڧݻͳϢϏΩλεݴޠΛࢧ͑Δ͜ͱ • υϝΠϯͱ࣮྆ํͷతʹ͑Δ୯ҰͷϞσϧΛཁٻ͢Δ͜ͱ • ΦϒδΣΫτࢦͷΑ͏ͳϞσϦϯάύϥμΠϜΛࢧ͑ΔιϑτΣ Ξ։ൃͷͨΊͷπʔϧͱݴޠ͕ඞཁ
• ίʔυΛ࡞͢Δਓ͕ϞσϧʹΛײ͍ͯ͡ͳ͍߹ɺΞϓϦ έʔγϣϯͷͨΊʹϞσϧΛػೳͤ͞Δํ๏Λཧղ͍ͯ͠ͳ͍߹ɺ ͦͷϞσϧιϑτΣΞͱແؔʹͳͬͯ͠·͏ɻ
ࠎ֨ΛΈͤΔ • Ϟσϧ͕໌Β͔ʹͳΕ • ϢʔβιϑτΣΞͷજࡏೳྗʹͬͱ৮ΕΒ ΕΔΑ͏ʹͳΓ • ;Δ·͍Ұ؏ͨ͠༧ଌՄೳͳͷʹͳΔ ͪΌΜͱϞσϧ͕ઃܭʹөͰ͖͍ͯΕɺϢʔβ͕ ιϑτΣΞ෦ʹ͍ͭͯ͋Δఔ༧ଌͰ͖Δͷ
ʹͳΔ
ୈ1෦·ͱΊ • ϝϦοτ • ༻ޠͷਖ਼֬ͳهड़ཧղ͕ϝϯόʔؒͰͰ͖ͦ͏ • ͜ΕʹΑΓ࡞ۀޙͷ༷ࠩ͠ͷݟམͱ͠ॳظஈ֊Ͱݟ͚ͭ͘͢ͳΓͦ͏ • σϝϦοτ •
ϞσϧͷϝϯςφϯείετͦΕͳΓʹߴͦ͏ • ϞσϧΛৠཹ͢ΔίετʢݴޠͷมߋɺυΩϡϝϯτͷมߋɺίʔυͷมߋʣ • ϞσϧΛมߋͨ͠ΒϦϑΝΫλϦϯάΛߦΘͳ͚Ε͍͚ͳ͍
͓ΘΓ