join()를 작성하지 않아도 자동으로 join을 해주는데 join()을 써주는 이유가 궁금합니다. @Test public void group() { List<Tuple> result = queryFactory .select(member.team.name, member.age.avg()) .from(member) // .join(member.team, team) .groupBy(member.team.name) .fetch(); Tuple teamA = result.get(0); Tuple teamB = result.get(1); assertThat(teamA.get(member.team.name)).isEqualTo("teamA"); assertThat(teamA.get(member.age.avg())).isEqualTo(15); //10, 20 assertThat(teamB.get(member.team.name)).isEqualTo("teamB"); assertThat(teamB.get(member.age.avg())).isEqualTo(35); //30, 40 }제가 위와 같이 코드를 수정하여 돌려봤는데 테스트를 잘 통과하였고 생성된 sql에서도 join을 자동으로 해주었습니다. 따로 join()을 쓰신 이유가 있을까요?

학습하는 분들께 도움이 되고, 더 좋은 답변을 드릴 수 있도록 질문전에 다음을 꼭 확인해주세요.1. 강의 내용과 관련된 질문을 남겨주세요.2. 인프런의 질문 게시판과 자주 하는 질문(링크)을 먼저 확인해주세요.(자주 하는 질문 링크: https://bit.ly/3fX6ygx)3. 질문 잘하기 메뉴얼(링크)을 먼저 읽어주세요.(질문 잘하기 메뉴얼 링크: https://bit.ly/2UfeqCG)질문 시에는 위 내용은 삭제하고 다음 내용을 남겨주세요.=========================================[질문 템플릿]1. 강의 내용과 관련된 질문인가요? (예/아니오)2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? (예/아니오)3. 질문 잘하기 메뉴얼을 읽어보셨나요? (예/아니오)[질문 내용]안녕하세요 복습 중 궁금한 부분이 있어 질문 드립니다.  H2 데이터베이스를 실행하지 않더라도 스프링 내부 DB 에서 테스트가 가능하다고 하셨는데 스프링 내부적으로 H2 DB 를 사용하는 건가요?  그 데이터들은 어느 위치에 보관이 되고 있는지 휘발성인지도 궁금합니다 감사합니다.

저는 testdb 라고 안뜨고url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|이렇게 나오는데, 같은 맥락인가요? --전체 콘솔--/Library/Java/JavaVirtualMachines/jdk-17.0.5.jdk/Contents/Home/bin/java -ea -Didea.test.cyclic.buffer.size=1048576 -javaagent:/Applications/IntelliJ IDEA CE.app/Contents/lib/idea_rt.jar=54927:/Applications/IntelliJ IDEA CE.app/Contents/bin -Dfile.encoding=UTF-8 -classpath /Applications/IntelliJ IDEA CE.app/Contents/lib/idea_rt.jar:/Applications/IntelliJ IDEA CE.app/Contents/plugins/junit/lib/junit5-rt.jar:/Applications/IntelliJ IDEA 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gradle/caches/modules-2/files-2.1/com.h2database/h2/2.1.214/d5c2005c9e3279201e12d4776c948578b16bf8b2/h2-2.1.214.jar:/Users/hyoozo/.gradle/caches/modules-2/files-2.1/org.glassfish.jaxb/jaxb-runtime/4.0.1/7abfa1ee788a8f090dc598c45876ef068731e72b/jaxb-runtime-4.0.1.jar:/Users/hyoozo/.gradle/caches/modules-2/files-2.1/org.jboss.logging/jboss-logging/3.5.0.Final/c19307cc11f28f5e2679347e633a3294d865334d/jboss-logging-3.5.0.Final.jar:/Users/hyoozo/.gradle/caches/modules-2/files-2.1/org.hibernate.common/hibernate-commons-annotations/6.0.2.Final/fa5a14ef3d2e5c3c99b53a4bef756a3268d69187/hibernate-commons-annotations-6.0.2.Final.jar:/Users/hyoozo/.gradle/caches/modules-2/files-2.1/org.jboss/jandex/2.4.2.Final/1e1c385990b258ff1a24c801e84aebbacf70eb39/jandex-2.4.2.Final.jar:/Users/hyoozo/.gradle/caches/modules-2/files-2.1/com.fasterxml/classmate/1.5.1/3fe0bed568c62df5e89f4f174c101eab25345b6c/classmate-1.5.1.jar:/Users/hyoozo/.gradle/caches/modules-2/files-2.1/jakarta.inject/jakarta.inject-api/2.0.0/46fc8560b6fd17b78396d88f39c1a730457671f0/jakarta.inject-api-2.0.0.jar:/Users/hyoozo/.gradle/caches/modules-2/files-2.1/org.antlr/antlr4-runtime/4.10.1/10839f875928f59c622d675091d51a43ea0dc5f7/antlr4-runtime-4.10.1.jar:/Users/hyoozo/.gradle/caches/modules-2/files-2.1/org.junit.jupiter/junit-jupiter-engine/5.9.2/572f7a553b53f83ee59cc045ce1c3772864ab76c/junit-jupiter-engine-5.9.2.jar:/Users/hyoozo/.gradle/caches/modules-2/files-2.1/org.objenesis/objenesis/3.2/7fadf57620c8b8abdf7519533e5527367cb51f09/objenesis-3.2.jar:/Users/hyoozo/.gradle/caches/modules-2/files-2.1/org.glassfish.jaxb/jaxb-core/4.0.1/b4707bb31dfcf54ae424b930741f0cd62d672af9/jaxb-core-4.0.1.jar:/Users/hyoozo/.gradle/caches/modules-2/files-2.1/org.eclipse.angus/angus-activation/1.0.0/f0ceddd49f92109fbfad9125e958f5bfd3f2aa1/angus-activation-1.0.0.jar:/Users/hyoozo/.gradle/caches/modules-2/files-2.1/org.glassfish.jaxb/txw2/4.0.1/797720dfe2e15504f6014fb82eb873051a653c75/txw2-4.0.1.jar:/Users/hyoozo/.gradle/caches/modules-2/files-2.1/com.sun.istack/istack-commons-runtime/4.1.1/9b3769c76235bc283b060da4fae2318c6d53f07e/istack-commons-runtime-4.1.1.jar com.intellij.rt.junit.JUnitStarter -ideVersion5 -junit4 jpabook.jpashop.service.MemberServiceTest01:50:34.324 [main] DEBUG org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Neither @ContextConfiguration nor @ContextHierarchy found for test class [MemberServiceTest]: using SpringBootContextLoader01:50:34.335 [main] DEBUG org.springframework.test.context.support.AbstractContextLoader - Could not detect default resource locations for test class [jpabook.jpashop.service.MemberServiceTest]: no resource found for suffixes {-context.xml, Context.groovy}.01:50:34.343 [main] INFO org.springframework.test.context.support.AnnotationConfigContextLoaderUtils - Could not detect default configuration classes for test class [jpabook.jpashop.service.MemberServiceTest]: MemberServiceTest does not declare any static, non-private, non-final, nested classes annotated with @Configuration.01:50:34.451 [main] DEBUG org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Using ContextCustomizers for test class [MemberServiceTest]: [DisableObservabilityContextCustomizer, PropertyMappingContextCustomizer, Customizer, ExcludeFilterContextCustomizer, DuplicateJsonObjectContextCustomizer, MockitoContextCustomizer, TestRestTemplateContextCustomizer]01:50:35.064 [main] DEBUG org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider - Identified candidate component class: file [/Users/hyoozo/Documents/study/jpashop/out/production/classes/jpabook/jpashop/JpashopApplication.class]01:50:35.067 [main] INFO org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Found @SpringBootConfiguration jpabook.jpashop.JpashopApplication for test class jpabook.jpashop.service.MemberServiceTest01:50:35.509 [main] DEBUG org.springframework.boot.test.context.SpringBootTestContextBootstrapper - Using TestExecutionListeners for test class [MemberServiceTest]: [ServletTestExecutionListener, DirtiesContextBeforeModesTestExecutionListener, ApplicationEventsTestExecutionListener, MockitoTestExecutionListener, DependencyInjectionTestExecutionListener, DirtiesContextTestExecutionListener, TransactionalTestExecutionListener, SqlScriptsTestExecutionListener, EventPublishingTestExecutionListener, RestDocsTestExecutionListener, MockRestServiceServerResetTestExecutionListener, MockMvcPrintOnlyOnFailureTestExecutionListener, WebDriverTestExecutionListener, MockWebServiceServerTestExecutionListener, ResetMocksTestExecutionListener]01:50:35.516 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [jpabook.jpashop.service.MemberServiceTest]01:50:35.522 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [jpabook.jpashop.service.MemberServiceTest]01:50:35.529 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [jpabook.jpashop.service.MemberServiceTest]01:50:35.530 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [jpabook.jpashop.service.MemberServiceTest]01:50:35.530 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [jpabook.jpashop.service.MemberServiceTest]01:50:35.530 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [jpabook.jpashop.service.MemberServiceTest]01:50:35.555 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [jpabook.jpashop.service.MemberServiceTest]01:50:35.558 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [jpabook.jpashop.service.MemberServiceTest]01:50:35.560 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [jpabook.jpashop.service.MemberServiceTest]01:50:35.561 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [jpabook.jpashop.service.MemberServiceTest]01:50:35.562 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [jpabook.jpashop.service.MemberServiceTest]01:50:35.562 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [jpabook.jpashop.service.MemberServiceTest]01:50:35.571 [main] DEBUG org.springframework.test.context.support.AbstractDirtiesContextTestExecutionListener - Before test class: class [MemberServiceTest], class annotated with @DirtiesContext [false] with mode [null]01:50:35.573 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved @ProfileValueSourceConfiguration [null] for test class [jpabook.jpashop.service.MemberServiceTest]01:50:35.574 [main] DEBUG org.springframework.test.annotation.ProfileValueUtils - Retrieved ProfileValueSource type [class org.springframework.test.annotation.SystemProfileValueSource] for class [jpabook.jpashop.service.MemberServiceTest] . ____ _ /\\ / ___'_ __ (_)_ _ \ \ \ \( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \ \\/ ___)| |_)| | | | | || (_| | ) ) ) ) ' |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot :: (v3.0.2)2023-02-21T01:50:37.029+09:00 INFO 19303 --- [ main] j.jpashop.service.MemberServiceTest : Starting MemberServiceTest using Java 17.0.5 with PID 19303 (started by hyoozo in /Users/hyoozo/Documents/study/jpashop)2023-02-21T01:50:37.037+09:00 INFO 19303 --- [ main] j.jpashop.service.MemberServiceTest : No active profile set, falling back to 1 default profile: "default"2023-02-21T01:50:38.911+09:00 INFO 19303 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.2023-02-21T01:50:39.024+09:00 INFO 19303 --- [ main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 44 ms. Found 0 JPA repository interfaces.2023-02-21T01:50:40.264+09:00 INFO 19303 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...2023-02-21T01:50:40.752+09:00 INFO 19303 --- [ main] com.zaxxer.hikari.pool.HikariPool : HikariPool-1 - Added connection conn0: url=jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37 user=SA2023-02-21T01:50:40.754+09:00 INFO 19303 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.2023-02-21T01:50:40.845+09:00 INFO 19303 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default]2023-02-21T01:50:40.970+09:00 INFO 19303 --- [ main] org.hibernate.Version : HHH000412: Hibernate ORM core version 6.1.6.Final2023-02-21T01:50:41.440+09:00 WARN 19303 --- [ main] org.hibernate.orm.deprecation : HHH90000021: Encountered deprecated setting [javax.persistence.sharedCache.mode], use [jakarta.persistence.sharedCache.mode] instead2023-02-21T01:50:41.773+09:00 INFO 19303 --- [ main] SQL dialect : HHH000400: Using dialect: org.hibernate.dialect.H2Dialect2023-02-21T01:50:42.396+09:00 INFO 19303 --- [ main] p6spy : 1676911842396|16|statement|connection 2|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|select from INFORMATION_SCHEMA.SEQUENCES|select from INFORMATION_SCHEMA.SEQUENCES2023-02-21T01:50:43.895+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : drop table if exists category cascade 2023-02-21T01:50:43.897+09:00 INFO 19303 --- [ main] p6spy : 1676911843897|1|statement|connection 3|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|drop table if exists category cascade |drop table if exists category cascade 2023-02-21T01:50:43.898+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : drop table if exists category_item cascade 2023-02-21T01:50:43.899+09:00 INFO 19303 --- [ main] p6spy : 1676911843899|0|statement|connection 3|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|drop table if exists category_item cascade |drop table if exists category_item cascade 2023-02-21T01:50:43.899+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : drop table if exists delivery cascade 2023-02-21T01:50:43.899+09:00 INFO 19303 --- [ main] p6spy : 1676911843899|0|statement|connection 3|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|drop table if exists delivery cascade |drop table if exists delivery cascade 2023-02-21T01:50:43.900+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : drop table if exists item cascade 2023-02-21T01:50:43.901+09:00 INFO 19303 --- [ main] p6spy : 1676911843900|0|statement|connection 3|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|drop table if exists item cascade |drop table if exists item cascade 2023-02-21T01:50:43.901+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : drop table if exists member cascade 2023-02-21T01:50:43.902+09:00 INFO 19303 --- [ main] p6spy : 1676911843902|0|statement|connection 3|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|drop table if exists member cascade |drop table if exists member cascade 2023-02-21T01:50:43.902+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : drop table if exists order_item cascade 2023-02-21T01:50:43.902+09:00 INFO 19303 --- [ main] p6spy : 1676911843902|0|statement|connection 3|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|drop table if exists order_item cascade |drop table if exists order_item cascade 2023-02-21T01:50:43.903+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : drop table if exists orders cascade 2023-02-21T01:50:43.903+09:00 INFO 19303 --- [ main] p6spy : 1676911843903|0|statement|connection 3|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|drop table if exists orders cascade |drop table if exists orders cascade 2023-02-21T01:50:43.904+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : drop sequence if exists category_seq2023-02-21T01:50:43.905+09:00 INFO 19303 --- [ main] p6spy : 1676911843905|0|statement|connection 3|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|drop sequence if exists category_seq|drop sequence if exists category_seq2023-02-21T01:50:43.905+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : drop sequence if exists delivery_seq2023-02-21T01:50:43.906+09:00 INFO 19303 --- [ main] p6spy : 1676911843906|0|statement|connection 3|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|drop sequence if exists delivery_seq|drop sequence if exists delivery_seq2023-02-21T01:50:43.907+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : drop sequence if exists item_seq2023-02-21T01:50:43.907+09:00 INFO 19303 --- [ main] p6spy : 1676911843907|0|statement|connection 3|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|drop sequence if exists item_seq|drop sequence if exists item_seq2023-02-21T01:50:43.908+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : drop sequence if exists member_seq2023-02-21T01:50:43.908+09:00 INFO 19303 --- [ main] p6spy : 1676911843908|0|statement|connection 3|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|drop sequence if exists member_seq|drop sequence if exists member_seq2023-02-21T01:50:43.909+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : drop sequence if exists order_item_seq2023-02-21T01:50:43.910+09:00 INFO 19303 --- [ main] p6spy : 1676911843910|0|statement|connection 3|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|drop sequence if exists order_item_seq|drop sequence if exists order_item_seq2023-02-21T01:50:43.910+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : drop sequence if exists orders_seq2023-02-21T01:50:43.911+09:00 INFO 19303 --- [ main] p6spy : 1676911843911|0|statement|connection 3|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|drop sequence if exists orders_seq|drop sequence if exists orders_seq2023-02-21T01:50:43.921+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : create sequence category_seq start with 1 increment by 502023-02-21T01:50:43.924+09:00 INFO 19303 --- [ main] p6spy : 1676911843923|1|statement|connection 4|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|create sequence category_seq start with 1 increment by 50|create sequence category_seq start with 1 increment by 502023-02-21T01:50:43.924+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : create sequence delivery_seq start with 1 increment by 502023-02-21T01:50:43.925+09:00 INFO 19303 --- [ main] p6spy : 1676911843925|0|statement|connection 4|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|create sequence delivery_seq start with 1 increment by 50|create sequence delivery_seq start with 1 increment by 502023-02-21T01:50:43.925+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : create sequence item_seq start with 1 increment by 502023-02-21T01:50:43.926+09:00 INFO 19303 --- [ main] p6spy : 1676911843926|0|statement|connection 4|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|create sequence item_seq start with 1 increment by 50|create sequence item_seq start with 1 increment by 502023-02-21T01:50:43.926+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : create sequence member_seq start with 1 increment by 502023-02-21T01:50:43.927+09:00 INFO 19303 --- [ main] p6spy : 1676911843926|0|statement|connection 4|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|create sequence member_seq start with 1 increment by 50|create sequence member_seq start with 1 increment by 502023-02-21T01:50:43.927+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : create sequence order_item_seq start with 1 increment by 502023-02-21T01:50:43.928+09:00 INFO 19303 --- [ main] p6spy : 1676911843928|0|statement|connection 4|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|create sequence order_item_seq start with 1 increment by 50|create sequence order_item_seq start with 1 increment by 502023-02-21T01:50:43.930+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : create sequence orders_seq start with 1 increment by 502023-02-21T01:50:43.933+09:00 INFO 19303 --- [ main] p6spy : 1676911843933|2|statement|connection 4|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|create sequence orders_seq start with 1 increment by 50|create sequence orders_seq start with 1 increment by 502023-02-21T01:50:43.937+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : create table category (category_id bigint not null, name varchar(255), parent_id bigint, primary key (category_id))2023-02-21T01:50:43.946+09:00 INFO 19303 --- [ main] p6spy : 1676911843946|8|statement|connection 4|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|create table category (category_id bigint not null, name varchar(255), parent_id bigint, primary key (category_id))|create table category (category_id bigint not null, name varchar(255), parent_id bigint, primary key (category_id))2023-02-21T01:50:43.947+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : create table category_item (category_id bigint not null, item_id bigint not null)2023-02-21T01:50:43.949+09:00 INFO 19303 --- [ main] p6spy : 1676911843949|1|statement|connection 4|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|create table category_item (category_id bigint not null, item_id bigint not null)|create table category_item (category_id bigint not null, item_id bigint not null)2023-02-21T01:50:43.949+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : create table delivery (delivery_id bigint not null, city varchar(255), street varchar(255), zipcode varchar(255), status varchar(255), primary key (delivery_id))2023-02-21T01:50:43.954+09:00 INFO 19303 --- [ main] p6spy : 1676911843953|4|statement|connection 4|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|create table delivery (delivery_id bigint not null, city varchar(255), street varchar(255), zipcode varchar(255), status varchar(255), primary key (delivery_id))|create table delivery (delivery_id bigint not null, city varchar(255), street varchar(255), zipcode varchar(255), status varchar(255), primary key (delivery_id))2023-02-21T01:50:43.954+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : create table item (dtype varchar(31) not null, item_id bigint not null, name varchar(255), price integer not null, stock_quantity integer not null, artist varchar(255), etc varchar(255), author varchar(255), isbn varchar(255), actor varchar(255), director varchar(255), primary key (item_id))2023-02-21T01:50:43.957+09:00 INFO 19303 --- [ main] p6spy : 1676911843957|2|statement|connection 4|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|create table item (dtype varchar(31) not null, item_id bigint not null, name varchar(255), price integer not null, stock_quantity integer not null, artist varchar(255), etc varchar(255), author varchar(255), isbn varchar(255), actor varchar(255), director varchar(255), primary key (item_id))|create table item (dtype varchar(31) not null, item_id bigint not null, name varchar(255), price integer not null, stock_quantity integer not null, artist varchar(255), etc varchar(255), author varchar(255), isbn varchar(255), actor varchar(255), director varchar(255), primary key (item_id))2023-02-21T01:50:43.957+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : create table member (member_id bigint not null, city varchar(255), street varchar(255), zipcode varchar(255), name varchar(255), primary key (member_id))2023-02-21T01:50:43.960+09:00 INFO 19303 --- [ main] p6spy : 1676911843959|1|statement|connection 4|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|create table member (member_id bigint not null, city varchar(255), street varchar(255), zipcode varchar(255), name varchar(255), primary key (member_id))|create table member (member_id bigint not null, city varchar(255), street varchar(255), zipcode varchar(255), name varchar(255), primary key (member_id))2023-02-21T01:50:43.960+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : create table order_item (order_item_id bigint not null, count integer not null, order_price integer not null, item_id bigint, order_id bigint, primary key (order_item_id))2023-02-21T01:50:43.962+09:00 INFO 19303 --- [ main] p6spy : 1676911843962|1|statement|connection 4|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|create table order_item (order_item_id bigint not null, count integer not null, order_price integer not null, item_id bigint, order_id bigint, primary key (order_item_id))|create table order_item (order_item_id bigint not null, count integer not null, order_price integer not null, item_id bigint, order_id bigint, primary key (order_item_id))2023-02-21T01:50:43.962+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : create table orders (order_id bigint not null, order_date timestamp(6), status varchar(255), delivery_id bigint, member_id bigint, primary key (order_id))2023-02-21T01:50:43.964+09:00 INFO 19303 --- [ main] p6spy : 1676911843964|1|statement|connection 4|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|create table orders (order_id bigint not null, order_date timestamp(6), status varchar(255), delivery_id bigint, member_id bigint, primary key (order_id))|create table orders (order_id bigint not null, order_date timestamp(6), status varchar(255), delivery_id bigint, member_id bigint, primary key (order_id))2023-02-21T01:50:43.965+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : alter table if exists category add constraint FK2y94svpmqttx80mshyny85wqr foreign key (parent_id) references category2023-02-21T01:50:43.986+09:00 INFO 19303 --- [ main] p6spy : 1676911843986|20|statement|connection 4|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|alter table if exists category add constraint FK2y94svpmqttx80mshyny85wqr foreign key (parent_id) references category|alter table if exists category add constraint FK2y94svpmqttx80mshyny85wqr foreign key (parent_id) references category2023-02-21T01:50:43.986+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : alter table if exists category_item add constraint FKu8b4lwqutcdq3363gf6mlujq foreign key (item_id) references item2023-02-21T01:50:43.989+09:00 INFO 19303 --- [ main] p6spy : 1676911843989|3|statement|connection 4|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|alter table if exists category_item add constraint FKu8b4lwqutcdq3363gf6mlujq foreign key (item_id) references item|alter table if exists category_item add constraint FKu8b4lwqutcdq3363gf6mlujq foreign key (item_id) references item2023-02-21T01:50:43.990+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : alter table if exists category_item add constraint FKcq2n0opf5shyh84ex1fhukcbh foreign key (category_id) references category2023-02-21T01:50:43.992+09:00 INFO 19303 --- [ main] p6spy : 1676911843992|2|statement|connection 4|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|alter table if exists category_item add constraint FKcq2n0opf5shyh84ex1fhukcbh foreign key (category_id) references category|alter table if exists category_item add constraint FKcq2n0opf5shyh84ex1fhukcbh foreign key (category_id) references category2023-02-21T01:50:43.992+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : alter table if exists order_item add constraint FKija6hjjiit8dprnmvtvgdp6ru foreign key (item_id) references item2023-02-21T01:50:43.995+09:00 INFO 19303 --- [ main] p6spy : 1676911843994|1|statement|connection 4|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|alter table if exists order_item add constraint FKija6hjjiit8dprnmvtvgdp6ru foreign key (item_id) references item|alter table if exists order_item add constraint FKija6hjjiit8dprnmvtvgdp6ru foreign key (item_id) references item2023-02-21T01:50:43.995+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : alter table if exists order_item add constraint FKt4dc2r9nbvbujrljv3e23iibt foreign key (order_id) references orders2023-02-21T01:50:43.997+09:00 INFO 19303 --- [ main] p6spy : 1676911843997|2|statement|connection 4|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|alter table if exists order_item add constraint FKt4dc2r9nbvbujrljv3e23iibt foreign key (order_id) references orders|alter table if exists order_item add constraint FKt4dc2r9nbvbujrljv3e23iibt foreign key (order_id) references orders2023-02-21T01:50:43.998+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : alter table if exists orders add constraint FKtkrur7wg4d8ax0pwgo0vmy20c foreign key (delivery_id) references delivery2023-02-21T01:50:44.000+09:00 INFO 19303 --- [ main] p6spy : 1676911844000|2|statement|connection 4|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|alter table if exists orders add constraint FKtkrur7wg4d8ax0pwgo0vmy20c foreign key (delivery_id) references delivery|alter table if exists orders add constraint FKtkrur7wg4d8ax0pwgo0vmy20c foreign key (delivery_id) references delivery2023-02-21T01:50:44.000+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : alter table if exists orders add constraint FKpktxwhj3x9m4gth5ff6bkqgeb foreign key (member_id) references member2023-02-21T01:50:44.005+09:00 INFO 19303 --- [ main] p6spy : 1676911844005|4|statement|connection 4|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|alter table if exists orders add constraint FKpktxwhj3x9m4gth5ff6bkqgeb foreign key (member_id) references member|alter table if exists orders add constraint FKpktxwhj3x9m4gth5ff6bkqgeb foreign key (member_id) references member2023-02-21T01:50:44.009+09:00 INFO 19303 --- [ main] o.h.e.t.j.p.i.JtaPlatformInitiator : HHH000490: Using JtaPlatform implementation: [org.hibernate.engine.transaction.jta.platform.internal.NoJtaPlatform]2023-02-21T01:50:44.026+09:00 INFO 19303 --- [ main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'2023-02-21T01:50:44.445+09:00 WARN 19303 --- [ main] JpaBaseConfiguration$JpaWebConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning2023-02-21T01:50:44.884+09:00 INFO 19303 --- [ main] o.s.b.a.w.s.WelcomePageHandlerMapping : Adding welcome page: class path resource [static/index.html]2023-02-21T01:50:45.303+09:00 INFO 19303 --- [ main] j.jpashop.service.MemberServiceTest : Started MemberServiceTest in 9.615 seconds (process running for 13.008)2023-02-21T01:50:46.493+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : select m1_0.member_id,m1_0.city,m1_0.street,m1_0.zipcode,m1_0.name from member m1_0 where m1_0.name=?2023-02-21T01:50:46.504+09:00 INFO 19303 --- [ main] p6spy : 1676911846504|0|statement|connection 5|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|select m1_0.member_id,m1_0.city,m1_0.street,m1_0.zipcode,m1_0.name from member m1_0 where m1_0.name=?|select m1_0.member_id,m1_0.city,m1_0.street,m1_0.zipcode,m1_0.name from member m1_0 where m1_0.name='kim'2023-02-21T01:50:46.529+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : select next value for member_seq2023-02-21T01:50:46.539+09:00 INFO 19303 --- [ main] p6spy : 1676911846539|2|statement|connection 5|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|select next value for member_seq|select next value for member_seq2023-02-21T01:50:46.611+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : insert into member (city, street, zipcode, name, member_id) values (?, ?, ?, ?, ?)2023-02-21T01:50:46.614+09:00 INFO 19303 --- [ main] p6spy : 1676911846614|1|statement|connection 5|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|insert into member (city, street, zipcode, name, member_id) values (?, ?, ?, ?, ?)|insert into member (city, street, zipcode, name, member_id) values (NULL, NULL, NULL, 'kim', 1)2023-02-21T01:50:46.624+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : select m1_0.member_id,m1_0.city,m1_0.street,m1_0.zipcode,m1_0.name from member m1_0 where m1_0.name=?2023-02-21T01:50:46.626+09:00 INFO 19303 --- [ main] p6spy : 1676911846625|0|statement|connection 5|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|select m1_0.member_id,m1_0.city,m1_0.street,m1_0.zipcode,m1_0.name from member m1_0 where m1_0.name=?|select m1_0.member_id,m1_0.city,m1_0.street,m1_0.zipcode,m1_0.name from member m1_0 where m1_0.name='kim'2023-02-21T01:50:46.650+09:00 INFO 19303 --- [ main] p6spy : 1676911846649|1|rollback|connection 5|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37||2023-02-21T01:50:46.673+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : select m1_0.member_id,m1_0.city,m1_0.street,m1_0.zipcode,m1_0.name from member m1_0 where m1_0.name=?2023-02-21T01:50:46.675+09:00 INFO 19303 --- [ main] p6spy : 1676911846675|0|statement|connection 6|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|select m1_0.member_id,m1_0.city,m1_0.street,m1_0.zipcode,m1_0.name from member m1_0 where m1_0.name=?|select m1_0.member_id,m1_0.city,m1_0.street,m1_0.zipcode,m1_0.name from member m1_0 where m1_0.name='kim'2023-02-21T01:50:46.676+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : select next value for member_seq2023-02-21T01:50:46.676+09:00 INFO 19303 --- [ main] p6spy : 1676911846676|0|statement|connection 6|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|select next value for member_seq|select next value for member_seq2023-02-21T01:50:46.696+09:00 DEBUG 19303 --- [ main] org.hibernate.SQL : insert into member (city, street, zipcode, name, member_id) values (?, ?, ?, ?, ?)2023-02-21T01:50:46.697+09:00 INFO 19303 --- [ main] p6spy : 1676911846697|0|statement|connection 6|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|insert into member (city, street, zipcode, name, member_id) values (?, ?, ?, ?, ?)|insert into member (city, street, zipcode, name, member_id) values (NULL, NULL, NULL, 'kim', 2)2023-02-21T01:50:46.699+09:00 INFO 19303 --- [ main] p6spy : 1676911846699|0|commit|connection 6|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37||2023-02-21T01:50:46.726+09:00 INFO 19303 --- [ionShutdownHook] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'2023-02-21T01:50:46.729+09:00 INFO 19303 --- [ionShutdownHook] .SchemaDropperImpl$DelayedDropActionImpl : HHH000477: Starting delayed evictData of schema as part of SessionFactory shut-down'2023-02-21T01:50:46.730+09:00 DEBUG 19303 --- [ionShutdownHook] org.hibernate.SQL : drop table if exists category cascade 2023-02-21T01:50:46.745+09:00 INFO 19303 --- [ionShutdownHook] p6spy : 1676911846745|13|statement|connection 7|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|drop table if exists category cascade |drop table if exists category cascade 2023-02-21T01:50:46.745+09:00 DEBUG 19303 --- [ionShutdownHook] org.hibernate.SQL : drop table if exists category_item cascade 2023-02-21T01:50:46.752+09:00 INFO 19303 --- [ionShutdownHook] p6spy : 1676911846752|7|statement|connection 7|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|drop table if exists category_item cascade |drop table if exists category_item cascade 2023-02-21T01:50:46.753+09:00 DEBUG 19303 --- [ionShutdownHook] org.hibernate.SQL : drop table if exists delivery cascade 2023-02-21T01:50:46.759+09:00 INFO 19303 --- [ionShutdownHook] p6spy : 1676911846759|5|statement|connection 7|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|drop table if exists delivery cascade |drop table if exists delivery cascade 2023-02-21T01:50:46.759+09:00 DEBUG 19303 --- [ionShutdownHook] org.hibernate.SQL : drop table if exists item cascade 2023-02-21T01:50:46.761+09:00 INFO 19303 --- [ionShutdownHook] p6spy : 1676911846760|1|statement|connection 7|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|drop table if exists item cascade |drop table if exists item cascade 2023-02-21T01:50:46.761+09:00 DEBUG 19303 --- [ionShutdownHook] org.hibernate.SQL : drop table if exists member cascade 2023-02-21T01:50:46.764+09:00 INFO 19303 --- [ionShutdownHook] p6spy : 1676911846764|2|statement|connection 7|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|drop table if exists member cascade |drop table if exists member cascade 2023-02-21T01:50:46.764+09:00 DEBUG 19303 --- [ionShutdownHook] org.hibernate.SQL : drop table if exists order_item cascade 2023-02-21T01:50:46.769+09:00 INFO 19303 --- [ionShutdownHook] p6spy : 1676911846769|4|statement|connection 7|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|drop table if exists order_item cascade |drop table if exists order_item cascade 2023-02-21T01:50:46.769+09:00 DEBUG 19303 --- [ionShutdownHook] org.hibernate.SQL : drop table if exists orders cascade 2023-02-21T01:50:46.771+09:00 INFO 19303 --- [ionShutdownHook] p6spy : 1676911846771|1|statement|connection 7|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|drop table if exists orders cascade |drop table if exists orders cascade 2023-02-21T01:50:46.772+09:00 DEBUG 19303 --- [ionShutdownHook] org.hibernate.SQL : drop sequence if exists category_seq2023-02-21T01:50:46.773+09:00 INFO 19303 --- [ionShutdownHook] p6spy : 1676911846773|0|statement|connection 7|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|drop sequence if exists category_seq|drop sequence if exists category_seq2023-02-21T01:50:46.773+09:00 DEBUG 19303 --- [ionShutdownHook] org.hibernate.SQL : drop sequence if exists delivery_seq2023-02-21T01:50:46.774+09:00 INFO 19303 --- [ionShutdownHook] p6spy : 1676911846774|0|statement|connection 7|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|drop sequence if exists delivery_seq|drop sequence if exists delivery_seq2023-02-21T01:50:46.774+09:00 DEBUG 19303 --- [ionShutdownHook] org.hibernate.SQL : drop sequence if exists item_seq2023-02-21T01:50:46.775+09:00 INFO 19303 --- [ionShutdownHook] p6spy : 1676911846775|0|statement|connection 7|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|drop sequence if exists item_seq|drop sequence if exists item_seq2023-02-21T01:50:46.775+09:00 DEBUG 19303 --- [ionShutdownHook] org.hibernate.SQL : drop sequence if exists member_seq2023-02-21T01:50:46.776+09:00 INFO 19303 --- [ionShutdownHook] p6spy : 1676911846776|0|statement|connection 7|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|drop sequence if exists member_seq|drop sequence if exists member_seq2023-02-21T01:50:46.776+09:00 DEBUG 19303 --- [ionShutdownHook] org.hibernate.SQL : drop sequence if exists order_item_seq2023-02-21T01:50:46.777+09:00 INFO 19303 --- [ionShutdownHook] p6spy : 1676911846777|0|statement|connection 7|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|drop sequence if exists order_item_seq|drop sequence if exists order_item_seq2023-02-21T01:50:46.777+09:00 DEBUG 19303 --- [ionShutdownHook] org.hibernate.SQL : drop sequence if exists orders_seq2023-02-21T01:50:46.778+09:00 INFO 19303 --- [ionShutdownHook] p6spy : 1676911846778|0|statement|connection 7|url jdbc:h2:mem:a8d68834-99ee-4507-a769-b266691c8e37|drop sequence if exists orders_seq|drop sequence if exists orders_seq2023-02-21T01:50:46.783+09:00 INFO 19303 --- [ionShutdownHook] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown initiated...2023-02-21T01:50:46.788+09:00 INFO 19303 --- [ionShutdownHook] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Shutdown completed.Process finished with exit code 0

mac m1사용 중입니다빌드시에 이런 에러가 발생합니다찾아보니 환경변수 셋팅 문제 같아서 확인해보니JAVA_HOME은 이렇게 설정되었다는데 왜 오류가 계속 발생하는지 모르겠습니다 ....zshrc 도 이렇게 설정하였습니다...

 Throw 로 생성을 해주니 클래스 부분에 스태틱을 포함하든가 메인 영역에 스태틱을 지우라고 오류가 뜹니다.선생님 코드에는 이상이 없는 것 같은데 궁금합니다!이렇게 클래스에 스태틱을 추가하면 오류가 사라집니다.

강력한 데이터 정합성을 보장한다는 Pessimistic Lock이 데이터 자체에 Lock을 거는 방식이라고 한다면 여기서 적용되는 락 기능의 범위가 조회를 통해 얻은 Stock 엔티티 자체를 말하는 건가요 아니면 Stock 테이블 내 모든 값들을 접근하는데 있어 lock이 필요하다는 건가요~~?

강의를 보다 의문이 생겨서 질문 드립니다.http.addFilterBefore(jwtAuthorizationRsaFilter(null), UsernamePasswordAuthenticationFilter.class);필터를 등록하실 때 jwtAuthorizationRsaFIlter에 null을 주셨습니다.@Bean public JwtAuthorizationRsaFilter jwtAuthorizationRsaFilter(RSAKey rsaKey) throws JOSEException { return new JwtAuthorizationRsaFilter(new RSASSAVerifier(rsaKey.toRSAPublicKey())); // 검증은 공개키 }그러나 jwtAuthorizationRsaFIlter는 파라미터에 넘어온 rsaKey를 이용하여 공개키를 찾는데 이 rsaKey는 어디서 주입 받는 것인가요??설정 클래스에 @Autowired는 모두 삭제한 것으로 알고 있습니다.jwtAuthenticationFilter를 등록할 때 역시 같은 이유로 어디서 주입 받는지 잘 모르겠습니다.

학습하는 분들께 도움이 되고, 더 좋은 답변을 드릴 수 있도록 질문전에 다음을 꼭 확인해주세요.1. 강의 내용과 관련된 질문을 남겨주세요.2. 인프런의 질문 게시판과 자주 하는 질문(링크)을 먼저 확인해주세요.(자주 하는 질문 링크: https://bit.ly/3fX6ygx)3. 질문 잘하기 메뉴얼(링크)을 먼저 읽어주세요.(질문 잘하기 메뉴얼 링크: https://bit.ly/2UfeqCG)질문 시에는 위 내용은 삭제하고 다음 내용을 남겨주세요.=========================================[질문 템플릿]1. 강의 내용과 관련된 질문인가요? (예/아니오)2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? (예/아니오)3. 질문 잘하기 메뉴얼을 읽어보셨나요? (예/아니오)[질문 내용]여기에 질문 내용을 남겨주세요.윈도우10기반 환경에서 vsc로 실습을 따라하는 과정에 오류가 발생하여 질문드립니다.500에러가 코드상에 문제가 있을수도 있다는 말을 보고 코드도 다시 확인해보았지만아무리 봐도 잘못된 부분이 보이지 않아 문의드립니다. index.html파일을 잘 실행되는데 그 뒤에 /hello를 붙이면 저런 오류가 발생합니다.

학습하는 분들께 도움이 되고, 더 좋은 답변을 드릴 수 있도록 질문전에 다음을 꼭 확인해주세요.1. 강의 내용과 관련된 질문을 남겨주세요.2. 인프런의 질문 게시판과 자주 하는 질문(링크)을 먼저 확인해주세요.(자주 하는 질문 링크: https://bit.ly/3fX6ygx)3. 질문 잘하기 메뉴얼(링크)을 먼저 읽어주세요.(질문 잘하기 메뉴얼 링크: https://bit.ly/2UfeqCG)질문 시에는 위 내용은 삭제하고 다음 내용을 남겨주세요.=========================================[질문 템플릿]1. 강의 내용과 관련된 질문인가요? (예)2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? (예/)3. 질문 잘하기 메뉴얼을 읽어보셨나요? (예)[질문 내용]getTotalPrice() 메서드가 OrderItem 클래스 안에 있으니까 orderPrice 변수와 count변수를 직접 건들수 있는데 왜 orderPrice*count가 아닌 getOrderPrice()* getCount()를 쓰는지 궁금합니다..

 강의를 보면 controller에서 작업을 마무리하고, 이후에 코드를 정리하면서 controller, service, repository로 3단 분리를 하시는데,실제로 처음부터 3단 분리를 하면서 코드를 짜려니까 머리 속에 로직이 잘 정리가 안되더라고요.처음부터 역할에 맞게 분리를 하며 코딩을 하시는지, 아니면 처음에는 머리 속의 로직을 그대로 쭉 코딩하신 후에 나중에 정리를 하시는 편이신지 궁금합니다.

 제네릭 클래스에서는 wrapper가 이러한 형식으로 쓰이는 가보다라고 문법처럼 이해를 했습니다. 근데 본질적으로 wrapper 클래스 강의를 보다 보니까 왜 원시자료형을 쓸 때는 intvValue(), doubleValue() 등등이 안되는지 이해가 안됩니다. 대충 알아보니 박싱 언박싱 개념이 나오는데... 그냥 메소드를 사용하려면 참조형이 되야 한다라고 생각하고, wrapper를 쓰면 원시-> 참조로 바뀐다고 생각하면 되나요? 그리고 parseInt()와 intValue()의 차이도 알고싶습니다. 혹시 이것도 parseInt()는 원시자료형이 필요하고 intValue()는 참조형이 필요하다고 생각하면 되나요? 

학습하는 분들께 도움이 되고, 더 좋은 답변을 드릴 수 있도록 질문전에 다음을 꼭 확인해주세요.1. 강의 내용과 관련된 질문을 남겨주세요.2. 인프런의 질문 게시판과 자주 하는 질문(링크)을 먼저 확인해주세요.(자주 하는 질문 링크: https://bit.ly/3fX6ygx)3. 질문 잘하기 메뉴얼(링크)을 먼저 읽어주세요.(질문 잘하기 메뉴얼 링크: https://bit.ly/2UfeqCG)질문 시에는 위 내용은 삭제하고 다음 내용을 남겨주세요.=========================================[질문 템플릿]1. 강의 내용과 관련된 질문인가요? (예/아니오)2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? (예/아니오)3. 질문 잘하기 메뉴얼을 읽어보셨나요? (예/아니오)[질문 내용]Description:Web server failed to start. Port 8080 was already in use.Action:Identify and stop the process that's listening on port 8080 or configure this application to listen on another port.Process finished with exit code 1이런식으로 나오면서 작동이 안됩니다 ㅠㅠ

https://www.inflearn.com/questions/770325 안녕하세요.OAuth2 를 Toggle 버튼 등으로 계정 하나에 여러 SNS 계정을 연동하는 방법에 질문 드렸었는데, 상세 내용 전달 드립니다. 이와 같이, 보여드린 사진처럼 이미 로그인을 한 상태에서 네이버, 카카오 등을 연동하는 것입니다 제가 생각해보았었던 구현 방법을 한번 말씀 드리겠습니다.사용자 로그인 (JWT)회원 상세 정보 화면 이동상세 화면에서 위에서 첨부 드린 사진과 같이, sns 설정을 통해 네이버 연동 시작네이버 선택시 oauth2/authorization/naver redirect사용자 네이버 로그인 과정네이버 로그인이 완료되면 OAuth2UserService 에서 네이버 계정의 정보를 얻어 오고, 기존 계정과 연동을 하고자 하는데 기존 계정의 정보를 알 수 있는 방법이 도저히 떠오르지 않아서 질문을 드렸었습니다.한 가지 생각한 것은, 4번의 과정에서 기존 계정을 Cookie 에 저장하고, 추후에 naver 로그인이 완료 되고 AuthenticationSuccessHandler 에서 request 안에 있는 cookie 로 판별하는 것이었습니다.하지만 이 방법은 (1) 기존 계정에 SNS 연동을 하려고 하는 건지(지금 말씀드리고 있는 방법) (2)계정 로그인이 안된 상태에서 SNS 로그인 과정을 걸치는 건지 2가지 케이스가 있을 것 같은데, 이런 부분을 쿠키를 통해서 분기 처리를 한다는 것이 데이터 정합성에 문제가 생기지 않을까 염려되었습니다. (AuthenticationSuccessHandler 에서 쿠키만으로 기존 password 계정에 SNS 연동을 하는 것인지, 신규 SNS 회원 가입인지 판별하는 것은 위험해보였습니다. )쿠키 방식 말고, (1) 기존 계정에 SNS 연동을 하려고 하는 건지(지금 말씀드리고 있는 방법) (2)계정 로그인이 안된 상태에서 SNS 로그인 과정을 걸치는 건지 2가지 케이스 를 구분할 수 있는 방법에 대해 조언 해주시면 감사하겠습니다!

학습하는 분들께 도움이 되고, 더 좋은 답변을 드릴 수 있도록 질문전에 다음을 꼭 확인해주세요.1. 강의 내용과 관련된 질문을 남겨주세요.2. 인프런의 질문 게시판과 자주 하는 질문(링크)을 먼저 확인해주세요.(자주 하는 질문 링크: https://bit.ly/3fX6ygx)3. 질문 잘하기 메뉴얼(링크)을 먼저 읽어주세요.(질문 잘하기 메뉴얼 링크: https://bit.ly/2UfeqCG)질문 시에는 위 내용은 삭제하고 다음 내용을 남겨주세요.=========================================[질문 템플릿]1. 강의 내용과 관련된 질문인가요? (예/아니오)2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? (예/아니오)3. 질문 잘하기 메뉴얼을 읽어보셨나요? (예/아니오)안녕하세요 강의를 듣고 있는데강의 파일에 있는 내용을 복사하면 된다 하시는데 강의 파일을 어디에서 다운 받거나 볼 수 있나요??아무리 찾아도 없습니다 ㅠㅜㅠㅜㅜㅠ

소수 개수 구하기 문제언어 : 파이썬내용: 제가 작성한 하위 코드 for문 두 개 돌렸을뿐인데 리미트 타임에러가 뜹니다..구글링 해서 emurate함수 써서 푼 문제는 정답이라고 뜹니다.난이도 초급에 emurate함수 방식으로 써서 풀라는 의도는 아니라고 판단되어 문의 드립니다. 아래 코드가 에러인지, 제가 잘 못하고 있는지 궁금합니다.(입사 전에는 자바로 면접 보고 들어갔는데 입사 한 회사에서 사용하는 언어는 파이썬이라서 파이썬으로 코테 풀고 있는점도 참고해서 피드백 부탁드립니다) received_data = int(input()) list = [] for i in range(2,received_data+1): list.append(0) for i in range(2,received_data+1): if list[i-2]==0: for j in range(2,received_data+1): if j>i and j%i==0: list[j-2]=1 print(list.count(0))  

안녕하세요 강의를 듣는중에 너무 궁금한 부분이 생겨서 도움을 얻고자 질문드립니다.수업과는 거리가 있을 수 있으나 생성자 주입 중private과 final이 바뀌어 작성되어도 구문 상 오류가 나질 않는데요 private final == final private주입 방법이 똑같은 의미로 받아들이면 될지 궁금합니다!!

회원 가입 후 db에서 저장되는 것이 조회가 되는데 회원 목록에 들어가면 500Error가 발생합니다.그래서 다시 실행시키면 db에 저장 시켰던 데이터도 사라집니다.어떻게 해결할 수 있을까요?package jpabook.jpabook.controller; import jpabook.jpabook.domain.Address; import jpabook.jpabook.domain.Member; import jpabook.jpabook.service.MemberService; import lombok.RequiredArgsConstructor; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.validation.BindingResult; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PostMapping; import org.springframework.web.bind.annotation.RequestMapping; import javax.validation.Valid; import java.util.List; @Controller @RequiredArgsConstructor public class MemberController { private final MemberService memberService; @GetMapping("/members/new") public String createForm(Model model){ model.addAttribute("memberForm", new MemberForm()); return "members/createMemberForm"; } @PostMapping("/members/new") public String create(@Valid MemberForm form, BindingResult result){ if(result.hasErrors()){ return "members/createMemberForm"; } Address address = new Address(form.getCity(), form.getStreet(), form.getZipcode()); Member member = new Member(); member.setName(form.getName()); member.setAddress(address); memberService.join(member); return "redirect:/"; } @GetMapping(value = "/members") public String list(Model model) { model.addAttribute("members", memberService.findMembers()); return "members/memberList"; } } 

학습하는 분들께 도움이 되고, 더 좋은 답변을 드릴 수 있도록 질문전에 다음을 꼭 확인해주세요.1. 강의 내용과 관련된 질문을 남겨주세요.2. 인프런의 질문 게시판과 자주 하는 질문(링크)을 먼저 확인해주세요.(자주 하는 질문 링크: https://bit.ly/3fX6ygx)3. 질문 잘하기 메뉴얼(링크)을 먼저 읽어주세요.(질문 잘하기 메뉴얼 링크: https://bit.ly/2UfeqCG)질문 시에는 위 내용은 삭제하고 다음 내용을 남겨주세요.=========================================[질문 템플릿]1. 강의 내용과 관련된 질문인가요? (예/아니오)2. 인프런의 질문 게시판과 자주 하는 질문에 없는 내용인가요? (예/아니오)3. 질문 잘하기 메뉴얼을 읽어보셨나요? (예/아니오)일반적으로 스프링 컨테이너는 싱글톤 기반으로 동작하기에 빈은 모든 쓰레드가 공유합니다. 그런데@PersistenceContext을 통해 주입 받은 EntityManager는 동시성 문제가 발생하지 않는다고 해서 의문이 생겼습니다. 따라서 관련된 내용을 공부하던 중 아래 질문의 영한님 답변을 봤습니다. https://www.inflearn.com/questions/158967/%EC%95%88%EB%85%95%ED%95%98%EC%84%B8%EC%9A%94-entitymanager%EC%97%90-%EB%8C%80%ED%95%B4-%EA%B6%81%EA%B8%88%ED%95%9C-%EC%A0%90%EC%9D%B4-%EC%9E%88%EC%96%B4-%EC%A7%88%EB%AC%B8-%EB%82%A8%EA%B9%81%EB%8B%88%EB%8B%A4제가 이해한 바로는 private final EntityManager em;를 통해 주입 받은 엔티티매니저는 싱글톤 빈이지만 일반적인 빈들과는 다릅니다.공통점 : 일반적인 스프링 빈과 엔티티 매니저는 모두 프록시 객체를 주입받는다. 그리고 이는 모두 싱글톤이다.차이점 : 일반적인 스프링 빈은 호출될때마다 에플리케이션 전체를 대상으로 해당 빈이 스프링 컨테이너에 등록되어 있는지 찾고 있으면 스프링 컨테이너에서 찾아 반환, 없으면 빈을 생성하고 등록(CGLIB 기술)반면 엔티티매니저는 이해가 가지 않습니다. 책 581 페이지를 보면 A, B 코드에서 호출한 엔티티 매니저는 서로 다르며 , 582에서 멀티 쓰레드에서 같은 코드에서 호출한 엔티티 매니저는 서로 같습니다. 일반적인 싱글톤 빈들이나 엔티티 매니저 모두 싱글톤이며 프록시 객체를 주입 받는 것 같은데 그 안의 원리들이 조금 다른 것 같은데 이 점이 궁금합니다.

test할때는 log.info잘 사용 안하나요?

모든 관계를 지연로딩으로 설계하고,성능을 최적화 시키기 위해 필요한 엔티티들만 페치조인을 이용하여 사용할 때영한님의 경우 메서드명을 어떻게 명명하시나요?실제로 실무에 적용 하다보니 이 부분이 정말 애매한 것같아서 질문드립니다.성능을 최적화 시킬려면 사용하는 주 엔티티(Member)에서 필요한 연관관계 엔티티(Team, Order, OrderItem, Item)들을 페치조인해서 사용해야 하는데 그러다보니 많은 메서드들이 나오고 그로인해 메서드명이 길어지는 등 문제가 발생하는데요..강의 내용을 예시로 들면// member - team 패치조인 getMemberWithTeam(Long memberId) // member - team, order 패치조인 getMemberWithTeamAndOrder(Long memberId) // member - team, locker, order 채치조인 getmemberWithTeamAndLockerAndOrder(Long memberId) ...이런 식으로 패치조인하는 엔티티명을 넣어주면 메서드명들이 너무 길어지고 난잡한? 느낌이 나서 영한님의 경우 어떻게 메서드명을 짓는지 궁금합니다.