웹 어플리케이션 설계와 구현 III - 소프트웨어 구현에 관하여

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1. ਢ য೒ܻா੉࣌ ࢸ҅৬ ҳഅ III - ࣗ೐౟ਝয ҳഅী ҙೞৈ 2018.08.01

   @ೠࣁࢎ੉ߡࠁউҊ١೟Ү ൤ٚ౟ۑ CTO ೠ݅ઙ

2. ё୓૑ೱ ࣗ೐౟ਝয ѐߊ • ё୓૑ೱ ೐۽Ӓې߁(Object Oriented Programming, OOP) -

   ҳઑ੸ ߑߨۿ੄ ޙઁ੼ਸ ೧Ѿೞӝ ਤ೧ ੋр੉ അप ࣁ҅ܳ ੉೧ೞח ߑधਵ۽ द झమਸ ѐߊೞ۰ח ֢۱ਵ۽ ఍ࢤ - “ؘ੉ఠ৬ ೐۽ࣁझܳ ܻ࠙ೞ૑ ঋҊ ё୓۽ ݽ؛݂”: “ੋр੉ ࢎҊೞח ߑध” - അप ࣁ҅ী ઓ੤ೞח ѐ֛ਸ ӝ߈ਵ۽ ೠ ё୓ۄח ة݀ػ ױਤ۽ दझమਸ ҳࢿೞ Ҋ, п ё୓ח ݫद૑ܳ ా೧ ࢚ഐ੘ਊ

3. ё୓૑ೱ ࣗ೐౟ਝয ѐߊ • ё୓૑ೱ ೐۽Ӓې߁(Object Oriented Programming, OOP) -

   ё୓(object) ‣ data + operation on data ‣ instance of class - ௿ېझ(class) ‣ description, abstraction - ݫࣁ૑(message) ‣ ё୓ р ࢚ഐ ੘ਊ(ݫࣗ٘ ഐ୹) ࣻױ

4. ё୓૑ೱ ࣗ೐౟ਝয ѐߊ • ё୓૑ೱ ೐۽Ӓې߁(Object Oriented Programming, OOP) -

   ୶࢚ച(abstraction) ‣ ࢚ࣁೠ ղਊਸ ऀӝҊ ೨ब੸ੋ ࠗ࠙(ౠ૚)ਸ ъઑೞৈ ݽ؛ച - ஭ङച(encapsulation) ‣ ੿ࠁ ਷ץਸ ా೧ ё୓ р Ѿ೤بܳ хࣗदெ ਬ૑ࠁࣻ ਊ੉, ੤ࢎਊࢿ ૐ؀ - ࢚ࣘࢿ(inheritance) ‣ ೞਤ ఋੑীࢲ ࢚ਤ ఋੑ੄ ӝמਸ ࢎਊೞৈ ഛ੢ೡ ࣻ ੓ب۾ ೲਊ - ׮ഋࢿ(polymorphism) ‣ ೞਤ ఋੑীࢲ ࢚ਤ ఋੑ੉ ઁҕೞח ߑߨਸ ా೧ Ҋਬೠ ز੘ਸ ࣻ೯ оמ

5. ё୓૑ೱ ࣗ೐౟ਝয ѐߊ • ۽ߡ౟ ݃౯੄ SOLID ਗ஗ - Single

   Responsibility Principle (SRP) ױੌ ଼੐ ਗ஗ - Open-Closed Principle (OCP) ѐߑ ತࣧ ਗ஗ - Liskov Substitution Principle (LSP) ܻझ௏೐ ஖ജ ਗ஗ - Interface Segregation Principle (ISP) ੋఠಕ੉झ ܻ࠙ ਗ஗ - Dependency Inversion Principle (DIP) ੄ઓ ৉੹ ਗ஗

6. ё୓૑ೱ ࣗ೐౟ਝয ѐߊ • ۽ߡ౟ ݃౯੄ SOLID ਗ஗ - ױੌ

   ଼੐ ਗ஗ (SRP) ‣ “௿ېझח ױ ೠ ѐ੄ ଼੐ਸ оઉঠ ೠ׮.” ‣ “௿ېझܳ ߸҃ೞח ੉ਬח ױ ೠ ѐৈঠ ೠ׮.”

7. ё୓૑ೱ ࣗ೐౟ਝয ѐߊ • ۽ߡ౟ ݃౯੄ SOLID ਗ஗ - ױੌ

   ଼੐ ਗ஗ (SRP) ‣ ೠ ௿ېझী ࢲ۽ ׮ܲ ੉ਬ۽ ߸҃غח ଼੐ٜ੉ ҕઓೞҊ ੓׮ݶ 
 SRPܳ ਤ߈ೞҊ ੓׮ח ૐѢ ‣ ೧׼ ௿ېझ੄ п ݫٜࣗ٘੉ ־ҳী ੄೧ प೯غח૑ ഛੋ റ ܻ࠙ ‣ ௿ېझ੄ ഐ୹੗ٜ੉ ࢲ۽ ׮ܲ ݫٜࣗ٘ਸ ࢎਊೠ׮ݶ, Ӓ ݫٜࣗ٘਷ пӝ ׮ ܲ ଼੐ী ࣘೡ оמࢿ੉ ֫׮. ੉ী ٮۄ ঌݏѱ ௿ېझܳ ܻ࠙ೞب۾ ೠ׮.

8. ё୓૑ೱ ࣗ೐౟ਝয ѐߊ • ۽ߡ౟ ݃౯੄ SOLID ਗ஗ - ѐߑ

   ತࣧ ਗ஗ (OCP) ‣ “ഛ੢ীח ৌ۰ ੓যঠ ೞҊ, ߸҃ীח ײഃ ੓যঠ ೠ׮.” ‣ “ӝמਸ ߸҃ೞѢա ഛ੢ೡ ࣻ ੓ਵݶࢲ,
 Ӓ ӝמਸ ࢎਊೞח ௏٘ח ࣻ੿غ૑ ঋইঠ ೠ׮.” ‣ ӝמਸ ഛ੢ೞݶࢲب ӝמਸ ࢎਊೞח ӝઓ௏٘ח ߸҃غ૑ ঋইঠ ೠ׮.

9. ё୓૑ೱ ࣗ೐౟ਝয ѐߊ • ۽ߡ౟ ݃౯੄ SOLID ਗ஗ - ѐߑ

   ತࣧ ਗ஗ (OCP) ‣ ഛ੢غח ࠗ࠙(૊, ߸ചೞח ࠗ࠙)ਸ ୶࢚ച೧ࢲ ೧Ѿ оמೞ׮. 1. ੋఠಕ੉झܳ ੉ਊೠ ୶࢚ച ߑߨ 2. ࢚ࣘਸ ੉ਊೠ ࢚ਤ ௿ېझ۽੄ ୶࢚ച ߑߨ

10. ё୓૑ೱ ࣗ೐౟ਝয ѐߊ • ۽ߡ౟ ݃౯੄ SOLID ਗ஗ - ѐߑ

    ತࣧ ਗ஗ (OCP) ‣ ইې੄ ҃਋ ؀ࠗ࠙਷ OCPܳ ਤ߈ೞҊ ੓׮ח ૐѢ׮. 1. ׮਍நझ౴ਸ ೠ׮. (instanceof ࢎਊ) 2. ࠺तೠ if-else ࠶۾੉ ৈۤ ઓ੤ೠ׮.

11. ё୓૑ೱ ࣗ೐౟ਝয ѐߊ • ۽ߡ౟ ݃౯੄ SOLID ਗ஗ - ѐߑ

    ತࣧ ਗ஗ (OCP) ‣ ߸ച৬ ҙ۲ػ ҳഅ(߸ചо ৘࢚غח ࠗ࠙)ਸ ୶࢚ചೞח Ѫ੉ ೨ब ‣ OCPܳ ా೧ࢲ ߸҃੄ ਬোೣਸ ઁҕೡ ࣻ ੓਺

12. ё୓૑ೱ ࣗ೐౟ਝয ѐߊ • ۽ߡ౟ ݃౯੄ SOLID ਗ஗ - ܻझ௏೐

    ஖ജ ਗ஗ (LSP) ‣ “࢚ਤ ఋੑ੄ ё୓ܳ ೞਤ ఋੑ੄ ё୓۽ ஖ജ೧ب ࢚ਤ ఋੑਸ ࢎਊೞח ೐۽Ӓ ۔਷ ੿࢚੸ਵ۽ ز੘೧ঠ ೠ׮.”

13. ё୓૑ೱ ࣗ೐౟ਝয ѐߊ • ۽ߡ౟ ݃౯੄ SOLID ਗ஗ - ܻझ௏೐

    ஖ജ ਗ஗ (LSP) ‣ OCPח ୶࢚ച(ੋఠಕ੉झ ҳഅ)৬ ׮ഋࢿ(࢚ࣘ)ਸ ా೧ ೧Ѿ ‣ LSPח OCPܳ ߉୛઱ח ׮ഋࢿী ҙೠ ਗ஗ਸ ઁҕ

14. ё୓૑ೱ ࣗ೐౟ਝয ѐߊ • ۽ߡ౟ ݃౯੄ SOLID ਗ஗ - ܻझ௏೐

    ஖ജ ਗ஗ (LSP) ‣ ইې੄ ҃਋ ؀ࠗ࠙਷ LSPܳ ਤ߈ೞҊ ੓׮ח ૐѢ׮. 1. ݺदػ ݺࣁীࢲ ߩযդ чਸ ܻఢೠ׮. 2. ݺदػ ݺࣁীࢲ ߩযդ ৘৻ܳ ߊࢤೠ׮. 3. ݺदػ ݺࣁীࢲ ߩযդ ӝמਸ ࣻ೯ೠ׮.

15. ё୓૑ೱ ࣗ೐౟ਝয ѐߊ • ۽ߡ౟ ݃౯੄ SOLID ਗ஗ - ੋఠಕ੉झ

    ܻ࠙ ਗ஗ (ISP) ‣ “ੋఠಕ੉झח Ӓ ੋఠಕ੉झܳ ࢎਊೞח ௿ۄ੉঱౟ܳ ӝળਵ۽ ܻ࠙غযঠ ೠ ׮.” ‣ “௿ۄ੉঱౟ח ੗न੉ ࢎਊೞח ݫࣗ٘ী݅ ੄ઓ೧ঠ ೠ׮.”

16. ё୓૑ೱ ࣗ೐౟ਝয ѐߊ • ۽ߡ౟ ݃౯੄ SOLID ਗ஗ - ੋఠಕ੉झ

    ܻ࠙ ਗ஗ (ISP) ‣ ࢎਊೞ૑ ঋח ੋఠಕ੉झ੄ ߸҃ী ੄೧ࢲ ߊࢤೞח ࠛ೙ਃೠ ৔ೱ(ࣗझ ੤ஹ౵ ੌ ١)ਸ ޷஘׮ݶ ISPܳ ਤ߈ೞҊ ੓׮ח ૐѢ ‣ ௿ۄ੉঱౟ ੑ੢ীࢲ ࢎਊೞח ӝמ݅ ઁҕೞب۾ ੋఠಕ੉झܳ ܻ࠙ ‣ ೞա੄ ӝמী ؀ೠ ߸҃੄ ৈ౵ܳ ୭ࣗച೧ળ׮.

17. ё୓૑ೱ ࣗ೐౟ਝয ѐߊ • ۽ߡ౟ ݃౯੄ SOLID ਗ஗ - ੄ઓ

    ৉੹ ਗ஗ (DIP) ‣ “Ҋࣻળ ݽٕ਷ ੷ࣻળ ݽٕ੄ ҳഅী ੄ઓ೧ࢲח উػ׮.” ‣ “੷ࣻળ ݽٕ੉ Ҋࣻળ ݽٕীࢲ ੿੄ೠ ୶࢚ ఋੑী ੄ઓ೧ঠ ೠ׮.”

18. ё୓૑ೱ ࣗ೐౟ਝয ѐߊ • ۽ߡ౟ ݃౯੄ SOLID ਗ஗ - ੄ઓ

    ৉੹ ਗ஗ (DIP) ‣ ੷ࣻળ ݽٕ੉ ߸҃غ؊ۄب Ҋࣻળ ݽٕ਷ ߸҃غ૑ ঋইঠ ೠ׮.

19. ё୓૑ೱ ࣗ೐౟ਝয ѐߊ • ё୓૑ೱ ೐۽Ӓې߁੄ ੢੼: ݽٕࢿ(modularity), ਬোࢿ(flexibility), ഛ੢ࢿ

    (extensibility), ਬ૑ҙܻࢿ(maintainability) • “ಁఢ(pattern)”ਸ ా೧ ё୓૑ೱ ೐۽Ӓې߁੄ ੢੼ਸ पഅ - ௏٘ ױਤ(code level): ீ౟߭੄ ~ҳഅ ಁఢ, ۽ߡ౟ ݃౯੄ ~Clean Code - ௿ېझ ױਤ(class level): GoF੄ ~٣੗ੋ ಁఢ, ݃౯ ౵਎۞੄ ~ܻಂష݂ - ಁః૑, ݽٕ ױਤ(package level): ীܼ ী߈झ੄ ~Domain Driven Development, ݃౯ ౵਎۞੄ ~PoEAA

20. ё୓૑ೱ ࣗ೐౟ਝয ѐߊ • GoF੄ ٣੗ੋ ಁఢ - ࣗ೐౟ਝয ҳഅীࢲ

    ੗઱ ߊࢤೞח ޙઁী ؀ೠ ೧Ѿ ߑߨਸ ੿ܻ - ё୓૑ೱ ঱য(C++, झށష௼)ܳ ӝ߈ਵ۽ ಁఢചػ ߑߨ - ࢤࢿ ಁఢ(Creational Pattern), ҳઑ ಁఢ(Structural Pattern), ೯ز ಁఢ (Behavioral Pattern)

21. ё୓૑ೱ ࣗ೐౟ਝয ѐߊ • ীܼ ী߈झ੄ Domain Driven Development -

    Ҋё, ࠺ૉפझ, ਃҳࢎ೦੄ بݫੋਸ ੜѱ ݽ؛݂ೞҊ ҳഅೞӝ ए਍, ੉೧ೞӝ ए ਍ ҳઑ۽ ࣗ೐౟ਝযܳ ࢸ҅ೞӝ ਤೠ ߑߨ - بݫੋীࢲ ൔ൤ ࢎਊغח ਊযܳ ӝ߈ਵ۽ ೠ Ubiquitous Language ࢎਊ - ೞਤ بݫੋ੄ ৉ೡ/ҙबࢎܳ ઺बਵ۽, ઑ૒ਸ ӝળਵ۽ Bounded Context ૑੿ - بݫੋ ݽ؛਷ Entity, Value Object, Service, Aggregate ١੄ ਃࣗ۽ ಴അ

22. Reference https://en.wikipedia.org/wiki/Unified_Modeling_Language http://contents.kocw.or.kr/document/lec/2011/33/04/Ch01.pdf http://byul124.cafe24.com/blog/wp-content/uploads/1/1059072550.pdf http://cjmyun.tripod.com/Knowledgebase/ConceptsOfObjectOriented.htm