스프링 실전 가이드
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1. The document discusses various Spring concepts including layers vs domains, Lombok annotations, SOLID principles, testing, exceptions, transactions, and JPA. 2. It provides code examples for implementing concepts like the repository pattern, POJO testing, controller testing, and data access with JPA. 3. Specific topics covered include layering, Lombok, GRASP principles, Spring Boot testing approaches, exception handling best practices, transaction isolation levels, and relationships and optimizations in JPA.
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스프링 실전 가이드
- 1. Spring Guide
- 2. 1.
- 4. Layer Layer
- 5. Domain
- 7. api : . rest api api . domain : . Embeddable, Enum . dto : Request, Response . exception : Exception . Domain
- 8. global . common : Value . Request, Response . config : . error : . Exception Guide . util : . global
- 9. infra . common : Value . Request, Response . config : . error : . Exception Guide . util : . infra
- 11. Repository
- 12. Aggregate
- 14. ->
- 15. , ->
- 16. 2. Lombok
- 17. Lombok
- 19. @Data @ToString, @EqualsAndHashCode, @Getter, @Setter, @RequiredArgsConstructor … … @Data
- 20. Setter . @Setter
- 21. Member Coupon ToString . JPA Json . ToString
- 22. ToString . @ToString(of = {“…”}) . ToString
- 23. @EqualsAndHashCode equals ( ) Set HashCode Lombok *.class @EqualsAndHashCode ..
- 25. . , . @Builder
- 26. , , . Builder
- 30. ( ) , , , …
- 31. 3.
- 33. .
- 34. ,
- 35. *
- 36. . . . .
- 37. . . . .
- 39. ' (what)' ' (how)' . . . . .
- 40. Sample Code
- 41. ' ' . . . . . ' ' . .
- 42. . , . . . , .
- 43. - What/Who - . What/Who . What/Who ' What' ' Who' . ' ' . .
- 45. . . .
- 46. Sample Code
- 47. , . .
- 48. (knowing) * * *
- 49. . " " . . . .
- 50. - . . , .
- 51. . . , , . . . .
- 52. Sample Code
- 53. Sample Code
- 55. 4. SOLID
- 57. * … … SOLID ?
- 58. : Open Close Principle , . .
- 61. API . API . API .
- 62. Request API RequestBody API , . shinhanCardNumber, number Request .
- 63. Request API API Request . DIP ' .' . ( DIP .) Request .
- 64. Request API -> OCP if . . if . if . XXXPaymentService . PaymentController , , .
- 65. OCP
- 66. OCP
- 67. OCP . PaymentController CardPayment . ( ) ( ) ( ) . cardPaymentFactory . , .
- 69. : Dependency Inversion Principle . . .
- 70. . . . .
- 72. DIP ( ) ( )
- 73. ( ) ( ) . JSON , . .
- 74. , PaymentRequest Dto CardType . . if . if .
- 75. XXXPaymentService . PaymentController , , . . DIP OCP SOLID .
- 76. DIP . . ( ) ( ) . ( ) ( ) ( ) .
- 77. PaymentController PaymentService cardPaymentFactory ShinhanCardPaymentService . , PaymenrService OCP .
- 79. : Single Responsibility Principle … …. . . (Actor) ?
- 80. SRP
- 82. SRP Actor Actor pay . Actor . Actor Actor ( ) . Actor
- 83. SRP( )
- 85. . Actor . ( = Actor) .
- 86. , ? Actor . Actor . . , , SRP . .
- 89. : The Liskov Substitution Principle . Exception . . .
- 90. :
- 91. : Sample Code
- 92. : Coupon calculateDiscountAmount() item getPrice() Item , Item SpecialItem Coupon calculateDiscountAmount item SpecialItem 0
- 93. : instanceof LSP . Item SpecialItem Item . instanceof SpecialItem . SpecialItem Item .
- 94. : instanceof Item . SpecialItem . OCP LSP Item . .
- 95. :
- 96. : Item SpecialItem . instanceof . Item . OCP . LSP .
- 97. 5.
- 98. ?
- 99. ? …
- 100. Spring Boot Test Bean Context . .
- 101. Spring Boot Test @SpringBootTest . . @SpringBootTest . . . . @RunWith JUnit .
- 102. Spring Boot Test
- 103. Spring Boot Test properties: {key=value} . classes: . @SpringBootConfiguration . webEnvironment: . Mock @ActiveProfiles("test") @Transactional . WebEnvironment.RANDOM_PORT, DEFINED_PORT . @Transactional rollback .
- 104. @WebMvcTest
- 105. @DataJpaTest @DataJpaTest JPA . , JPA , , . . @Entity JPA .
- 106. @DataJpaTest
- 107. @DataJpaTest @AutoConfigureTestDatabase Replace.Any . @AutoConfigureTestDatabase(replace = AutoConfigureTestDatabase.Replace.NONE) @ActiveProfiles("test") . @DataJpaTest . .
- 108. @RestClientTest @RestClientTest REST . REST JSON .
- 109. @RestClientTest @RestClientTest Bean . @Rule @Before, @After . . MockRestServiceServer REST . RestTemplate . . rest_test() . test.json ( .).
- 110. 1. Mock Service = POJO 2. WebMvc Test 3. Spring Boot Test
- 111. Code
- 112. Code
- 113. Repository Test Code
- 114. POJO Code
- 116. POJO Test , Spring Boot . Slice . POJO POJO . POJO POJO . . .
- 117. POJO Document
- 120. Controller
- 122. Import Set up SQL given when, then . . . . member insert . data.sql .
- 123. Import Set up ->
- 124. Junit5 With Kotlin & Spring Boot 2.2
- 128. Junit5 With Kotlin & Spring Boot 2.2
- 129. Junit5 With Kotlin & Spring Boot 2.2
- 130. Junit5 With Kotlin & Spring Boot 2.2
- 131. Junit5 With Kotlin & Spring Boot 2.2 * AssertJ BDD BDDAssertion .
- 134. 6. Exception
- 135. Exception ?
- 136. . .
- 137. . .
- 138. Exception
- 139. . . . .
- 141. . ( ) . ( ) Catch . ( ) Catch . ( )
- 142. Try Catch
- 143. Check Exception VS UnChecked Exception Error . Error … Checked, Unchecked Exception Checked = . ( , ) -> Unchecked = Runtime Exception
- 144. Check Exception VS UnChecked Exception Error . Error … Checked, Unchecked Exception Checked = . ( , ) -> Unchecked =
- 145. Check Exception JsonProcessingException IOException Exception Checked Exception . throws try catch throw . . Unchecked Exception .
- 146. Rollback
- 147. Rollback (1) RuntimeException yun member rollback . (2) IOException wan rollback commit . member yun, wan insert yun rollback wan rollback commit .
- 148. Checked Exception Rollback ?
- 149. Checked Exception Rollback ? Checked Exception . . . Rollback ( 100%)
- 150. Checked Exception Rollback ? .
- 151. …
- 152. (1)… Checked Exception . SQLException ? + insert RuntimeException .
- 153. (1)… Exception Exception . DuplicateEmailException (Unchecked Exception) . Checked Exception Unchecked Exception . JPA Checked Exception RuntimeException .
- 154. Checked Exception . throw try catch . .
- 155. Unckecked Exception Checked Exception Unckecekd Exception . .
- 156. API Server Exception
- 157. Error Response Error Response Error Response . . Map<Key, Value> . .
- 158. Error Response message : message . status : http status code . header . errors : field, value, reason . @Valid JSR 303: Bean Validation . errors null [] . null . null . code :
- 159. Error Response ErrorResponse . POJO errorResponse.getXXX(); . Exception ErrorResponse . .
- 161. Error Code enum . , . C001 enum . Common .
- 162. Business Exception Business Exception Exception . . Exception . Exception Business Exception . Exception . . . , , . Exception .
- 163. BusinessException BusinessException InvalidValueException, EntityNotFoundExceptuon . InvalidValueException : Excetion , EntityNotFoundException : findById, findByCode
- 164. BusinessException BusinessException . BusinessException . handleBusinessException . . BusinessException .
- 165. . . . . Bean Validation . @ControllerAdvice . .
- 166. Custom Validation (1) Bean Validation . .
- 169. Custom Validation (2) JSR 303 Validation . @NotNull, @NotEmpty, @Email Validation . , . JSON account, card paymentMethod @NotNull, @NotEmpty . ConstraintValidator .
- 170. ConstraintValidator ConstraintValidator Validation ConstraintValidator . . Validation , ( ) .
- 172. ErrorResponse - Error Response ErrorReponse . ConstraintValidator @Valid MethodArgumentNotValidException @ControllerAdvice ErrorResponse .
- 173. ErrorResponse
- 174. ConstraintValidator
- 175. ConstraintValidator
- 176. 7.
- 179. CGLIB Proxy . ( Dynamic Proxy ) Proxy . AOP
- 180. JPA Repository interface ?
- 181. @Transactional aRepository, bRepository . Service .
- 182. bRepository.save(B("B")) exception bRepository.save(B("B")), aRepository.save(A("A")) rollback .
- 183. Isolation Level 5
- 186. SQL 10 sleep increase() RuntimeException READ_UNCOMMITTED, READ_COMMITTED
- 188. 1 . ( ) 2 ( READ_UNCOMMITTED 2 1 ) 1 wake up Exception 2 15 Duty Read .
- 190. 1. 1 sleep ( ) 2. 2 . ( READ_COMMITTED .) 3. 1 . Nonrepeatable Read REPEATABLE_READ 1 , 2
- 191. . REPEATABLE_READ . REPEATABLE_READ 1. 1 sleep ( ) 2. 2 1 . REPEATABLE_READ DB . / .
- 192. 1. 1 2. 2 insert 3. 1 ( ) . SERIALIZABLE . SERIALIZABLE . SERIALIZABLE
- 194. : Lost Update
- 195. : Lost Update T1, T2 . T1 , T2 T1 T1 T2 . T1 T2 T1 .
- 197. . . . DBMS . . .
- 198. . . -> . ->
- 199. 1 2 , 2 1 . 1 . 2 . 1 2 2 1 . .
- 201. DBMS . DBMS for update . JPA EntityManager LockModeType find() , LockModeType.PESSIMISTIC_WRITE . JPA DBMS , PESSIMISTIC_WRITE for update .
- 202. 1. 1: A 2. 2: B 3. 1: B 4. 2 : A . 1 2 . , . . . JPA . JPA javax.persistence.lock.timeout . . (DBMS . )
- 203. Isolcation Level REPEATABLE_READ DB . 1 2 . JPA REPEATABLE_READ . In JPA
- 204. JPA . 1 A , B . Commit . REPEATABLE_READ ( ) 1 REPEATABLE_READ . In JPA
- 205. A B . second lost updates problem . . . 3 . 1. : A B . 2. : A B . 3. : A B .
- 206. 1. . 2. . . 3. . 4. 1 .
- 207. . . , . , . DBMS .
- 208. . 1 , . . 1 . , .
- 209. 1. 1 2. 2 3. 1 ( 2 ), 6 . 4. 2 , 6 2
- 210. JPA . @Version . JPA UPDATE @Version . 10 UP- DATE .
- 211. . Repository . JPA .
- 212. Flow
- 213. Application Event
- 214. Application Event ( ) ( , )
- 215. Application Event OrderService . , OrderService . Application Event .
- 216. Application Event - Application Event Subscriber . OrderService .
- 217. Application Event (Item) , event . . . .
- 218. JPA
- 219. JPA Setter
- 220. , , setter . setter . Setter .
- 223. JPA
- 225. . JPA ( , , ) . ?
- 226. order coupon_id SQL . coupon coupon order order INSERT SQL , coupon order_id 2 . Order : INSERT SQL
- 228. OneToOne , . OneToMany Many . OneToMany OneToMany . OneToOne . <-> OneToOne . ( . ) .
- 229. @JoinColumn nullable false . NOT NULL . JPA DDL Spec .
- 230. NOT NULL . JPA SQL . NOT NULL . . .
- 231. . applyCoupon .
- 233. . 1:N . 1 OneToMany
- 235. CaseCade PERSIST Delivery DeliveryLog . CaseCade PERSIST , insert query . Delivery
- 236. JPA . . Delivery DeliveryLog . (orphanRemoval) : DeliveryLog
- 237. delivery, deliverylog Delivery . delete SQL delivery_log delivery . orphanRemoval . (orphanRemoval) : Delivery
- 238. DeliveryLog clear() DeliveryLog Delivery DeliveryLog . (orphanRemoval) :
- 239. Embedded
- 240. String Email . . . . Email String Email .
- 241. String Account , . Account . Account . . . Email Email . Email . . . (Rich Object)
- 242. Money , , . .
- 243. JPA N+1
- 244. ERD
- 245. N+1
- 246. N+1
- 247. N+1
- 248. Member N+1 . N+1
- 249. N+1 JPQL . findById() JPQL SQL . . 1. JPQL . 2. . 3. ( ) .
- 250. N+1 JPQL JPA SQL . JPQL , JPQL SQL .
- 251. : Batch Size @BatchSize(size = 5) size . size where in size where in . spring.jpa.properties.hibernate.default_batch_fetch_size=1000 properties
- 252. : Fetch fetch . Fetch . Fetch .
- 253. Fetch SQL . JPQL select . Lazy N+1 .
- 254. Fetch Fetch API . limit offset . API . FULL Scan limit . Full Sacn . API .
- 255. Fetch . . annot simultaneously fetch multiple bag . List -> Set .
- 256. Fetch . . annot simultaneously fetch multiple bag . List -> Set .
- 258. Properties
- 260. key properties value . amount 100 int amount . . email email-address getProperty() email-address . 1 runtime NullPointException .
- 264. @ConstructorBinding data class . 2.2.1 @ConfigurationProperties scanning disabled @EnableConfigurationProperties .
- 265. END