JPA ??? Week2 - Object Relational Mapping
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This document discusses Object-Relational Mapping (ORM) and JPA. It begins with an introduction to the author and their background and credentials. It then poses some questions about ORM and defines it as mapping between object-oriented programming languages and relational databases. It discusses some of the challenges with ORM including differences in granularity, inheritance, identity, associations, and data navigation between objects and relational databases. It also covers ORM patterns like Active Record and Data Mapper and compares JPA, Hibernate, and Spring Data JPA. Finally, it provides a case study example of applying ORM and architectural patterns to an online ordering system.
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- 1. JPA Covenant Ko Chapter 2 Object Relational Mapping JPA
- 2. - Name. Covenant Ko - Company. 11?? - Github ?????? Organization Founder & Maintainer. https://github.com/brave-people - Github. https://github.com/KoEonYack - Tech Blog. https://covenant.tistory.com/ (?? ?? 41?)
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- 9. ? Mapping Logic Object Object Object Object Object Object Object Object Database 1. How?
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- 21. The Object Relational Impedance Mismatch 1. Granularity 2. Subtypes(Inheritance) 3. Identity 4. Association 5. Data navigation http://hibernate.org/orm/what-is-an-orm/ 1. 2. RDBMS . 3. ( )
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- 24. The Object Relational Impedance Mismatch 1. Granularity 2. Subtypes(Inheritance) 3. Identity 4. Association 5. Data navigation http://hibernate.org/orm/what-is-an-orm/ 1. Java member.getCoupon() 2. RDMSB Join
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- 28. http://blog.ant-holdings.com/2013/10/16/software-architect-courses-part-4-5/ Datasource Architecture Pattern ??? ??? ??????? ???? ??? ?? 1. Table Gateway (Table mapping per one instance) 2. Raw Data Gateway (Record mapping per one instance) 3. Active Record (Table mapping and domain instance a class) 4. Data Mapper (OR mapping layer)
- 29. http://blog.ant-holdings.com/2013/10/16/software-architect-courses-part-4-5/ Datasource Architecture Pattern ??? ??? ??????? ???? ??? ?? 1. Table Gateway (Table mapping per one instance) 2. Row Data Gateway (Record mapping per one instance) 3. Active Record (Table mapping and domain instance a class) 4. Data Mapper (OR mapping layer)
- 30. ActiveRecord Pattern 1. 2. Rails, Django 3. An object that wraps a row in a database table or view, encapsulates the database access, and adds domain logic on that data. https://martinfowler.com/eaaCatalog/activeRecord.html
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- 34. ActiveRecord Pattern 1. , , 2. , . 3. , , . , Foreign key , 4. Active Record , CRUD ( ) 5.
- 35. DataMapper Pattern 1. , DB , 2. ORM , , (ex. JPA) ORM ? 3. , .
- 44. Case Study Service Controller Service Entity Repository Web Domain Persistence ?? ?? ???? ???? API
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- 50. Case Study (SRP ) OrderController Entity Repository Web Domain Persistence Order API MemberController Member API OrderService MemberService Entity Repository Persistence
- 51. https://www.hanbit.co.kr/media/community/review_view.html?hbr_idx=8675&page=39 Software Architecture . Self Discipline
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