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
   

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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
   

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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
   

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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
   

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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஗
   

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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׮.”
   

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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׮.
   

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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׮.
   

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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
   

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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׮.
    

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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 ࣻ ੓਺
    

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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׮.”
    

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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
    

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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׮.
    

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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׮.”
    

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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׮.
    

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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׮.”
    

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18. ё୓૑ೱ ࣗ೐౟ਝয ѐߊ
    • ۽ߡ౟ ݃౯੄ SOLID ਗ஗
    
    - ੄ઓ ৉੹ ਗ஗ (DIP)
    
    ‣ ੷ࣻળ ݽٕ੉ ߸҃غ؊ۄب Ҋࣻળ ݽٕ਷ ߸҃غ૑ ঋইঠ ೠ׮.
    

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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
    

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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)
    

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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
    

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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
    

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