diff --git a/.gitignore b/.gitignore new file mode 100644 index 000000000..c2065bc26 --- /dev/null +++ b/.gitignore @@ -0,0 +1,37 @@ +HELP.md +.gradle +build/ +!gradle/wrapper/gradle-wrapper.jar +!**/src/main/**/build/ +!**/src/test/**/build/ + +### STS ### +.apt_generated +.classpath +.factorypath +.project +.settings +.springBeans +.sts4-cache +bin/ +!**/src/main/**/bin/ +!**/src/test/**/bin/ + +### IntelliJ IDEA ### +.idea +*.iws +*.iml +*.ipr +out/ +!**/src/main/**/out/ +!**/src/test/**/out/ + +### NetBeans ### +/nbproject/private/ +/nbbuild/ +/dist/ +/nbdist/ +/.nb-gradle/ + +### VS Code ### +.vscode/ diff --git a/build.gradle b/build.gradle new file mode 100644 index 000000000..262eba5de --- /dev/null +++ b/build.gradle @@ -0,0 +1,41 @@ +plugins { + id 'java' + id 'org.springframework.boot' version '3.1.5' + id 'io.spring.dependency-management' version '1.1.3' +} + +group = 'com.sehee' +version = '0.0.1-SNAPSHOT' + +java { + sourceCompatibility = '17' +} + +configurations { + compileOnly { + extendsFrom annotationProcessor + } +} + +repositories { + mavenCentral() +} + +dependencies { + implementation 'org.springframework.boot:spring-boot-starter-data-jpa' + implementation 'org.springframework.boot:spring-boot-starter-web' + compileOnly 'org.projectlombok:lombok' + annotationProcessor 'org.projectlombok:lombok' + runtimeOnly 'com.mysql:mysql-connector-j' + testCompileOnly 'org.projectlombok:lombok' + testAnnotationProcessor 'org.projectlombok:lombok' + testImplementation 'org.springframework.boot:spring-boot-starter-test' +} + +tasks.named('bootBuildImage') { + builder = 'paketobuildpacks/builder-jammy-base:latest' +} + +tasks.named('test') { + useJUnitPlatform() +} diff --git a/docker-compose.yml b/docker-compose.yml new file mode 100644 index 000000000..e15708ad2 --- /dev/null +++ b/docker-compose.yml @@ -0,0 +1,15 @@ +version: "3.8" + +services: + mysql: + image: mysql:latest + ports: + - "3308:3306" + volumes: + - "data_volume:/var/lib/mysql" + environment: + MYSQL_PASSWORD: "root" + MYSQL_ROOT_PASSWORD: "root" + MYSQL_DATABASE: "weeklyjpa" +volumes: + data_volume: \ No newline at end of file diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar new file mode 100644 index 000000000..7f93135c4 Binary files /dev/null and b/gradle/wrapper/gradle-wrapper.jar differ diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties new file mode 100644 index 000000000..3fa8f862f --- /dev/null +++ b/gradle/wrapper/gradle-wrapper.properties @@ -0,0 +1,7 @@ +distributionBase=GRADLE_USER_HOME +distributionPath=wrapper/dists +distributionUrl=https\://services.gradle.org/distributions/gradle-8.4-bin.zip +networkTimeout=10000 +validateDistributionUrl=true +zipStoreBase=GRADLE_USER_HOME +zipStorePath=wrapper/dists diff --git a/gradlew b/gradlew new file mode 100644 index 000000000..1aa94a426 --- /dev/null +++ b/gradlew @@ -0,0 +1,249 @@ +#!/bin/sh + +# +# Copyright © 2015-2021 the original authors. +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# https://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +# + +############################################################################## +# +# Gradle start up script for POSIX generated by Gradle. +# +# Important for running: +# +# (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is +# noncompliant, but you have some other compliant shell such as ksh or +# bash, then to run this script, type that shell name before the whole +# command line, like: +# +# ksh Gradle +# +# Busybox and similar reduced shells will NOT work, because this script +# requires all of these POSIX shell features: +# * functions; +# * expansions «$var», «${var}», «${var:-default}», «${var+SET}», +# «${var#prefix}», «${var%suffix}», and «$( cmd )»; +# * compound commands having a testable exit status, especially «case»; +# * various built-in commands including «command», «set», and «ulimit». +# +# Important for patching: +# +# (2) This script targets any POSIX shell, so it avoids extensions provided +# by Bash, Ksh, etc; in particular arrays are avoided. +# +# The "traditional" practice of packing multiple parameters into a +# space-separated string is a well documented source of bugs and security +# problems, so this is (mostly) avoided, by progressively accumulating +# options in "$@", and eventually passing that to Java. +# +# Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS, +# and GRADLE_OPTS) rely on word-splitting, this is performed explicitly; +# see the in-line comments for details. +# +# There are tweaks for specific operating systems such as AIX, CygWin, +# Darwin, MinGW, and NonStop. +# +# (3) This script is generated from the Groovy template +# https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt +# within the Gradle project. +# +# You can find Gradle at https://github.com/gradle/gradle/. +# +############################################################################## + +# Attempt to set APP_HOME + +# Resolve links: $0 may be a link +app_path=$0 + +# Need this for daisy-chained symlinks. +while + APP_HOME=${app_path%"${app_path##*/}"} # leaves a trailing /; empty if no leading path + [ -h "$app_path" ] +do + ls=$( ls -ld "$app_path" ) + link=${ls#*' -> '} + case $link in #( + /*) app_path=$link ;; #( + *) app_path=$APP_HOME$link ;; + esac +done + +# This is normally unused +# shellcheck disable=SC2034 +APP_BASE_NAME=${0##*/} +# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036) +APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit + +# Use the maximum available, or set MAX_FD != -1 to use that value. +MAX_FD=maximum + +warn () { + echo "$*" +} >&2 + +die () { + echo + echo "$*" + echo + exit 1 +} >&2 + +# OS specific support (must be 'true' or 'false'). +cygwin=false +msys=false +darwin=false +nonstop=false +case "$( uname )" in #( + CYGWIN* ) cygwin=true ;; #( + Darwin* ) darwin=true ;; #( + MSYS* | MINGW* ) msys=true ;; #( + NONSTOP* ) nonstop=true ;; +esac + +CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar + + +# Determine the Java command to use to start the JVM. +if [ -n "$JAVA_HOME" ] ; then + if [ -x "$JAVA_HOME/jre/sh/java" ] ; then + # IBM's JDK on AIX uses strange locations for the executables + JAVACMD=$JAVA_HOME/jre/sh/java + else + JAVACMD=$JAVA_HOME/bin/java + fi + if [ ! -x "$JAVACMD" ] ; then + die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME + +Please set the JAVA_HOME variable in your environment to match the +location of your Java installation." + fi +else + JAVACMD=java + if ! command -v java >/dev/null 2>&1 + then + die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. + +Please set the JAVA_HOME variable in your environment to match the +location of your Java installation." + fi +fi + +# Increase the maximum file descriptors if we can. +if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then + case $MAX_FD in #( + max*) + # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked. + # shellcheck disable=SC2039,SC3045 + MAX_FD=$( ulimit -H -n ) || + warn "Could not query maximum file descriptor limit" + esac + case $MAX_FD in #( + '' | soft) :;; #( + *) + # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked. + # shellcheck disable=SC2039,SC3045 + ulimit -n "$MAX_FD" || + warn "Could not set maximum file descriptor limit to $MAX_FD" + esac +fi + +# Collect all arguments for the java command, stacking in reverse order: +# * args from the command line +# * the main class name +# * -classpath +# * -D...appname settings +# * --module-path (only if needed) +# * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables. + +# For Cygwin or MSYS, switch paths to Windows format before running java +if "$cygwin" || "$msys" ; then + APP_HOME=$( cygpath --path --mixed "$APP_HOME" ) + CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" ) + + JAVACMD=$( cygpath --unix "$JAVACMD" ) + + # Now convert the arguments - kludge to limit ourselves to /bin/sh + for arg do + if + case $arg in #( + -*) false ;; # don't mess with options #( + /?*) t=${arg#/} t=/${t%%/*} # looks like a POSIX filepath + [ -e "$t" ] ;; #( + *) false ;; + esac + then + arg=$( cygpath --path --ignore --mixed "$arg" ) + fi + # Roll the args list around exactly as many times as the number of + # args, so each arg winds up back in the position where it started, but + # possibly modified. + # + # NB: a `for` loop captures its iteration list before it begins, so + # changing the positional parameters here affects neither the number of + # iterations, nor the values presented in `arg`. + shift # remove old arg + set -- "$@" "$arg" # push replacement arg + done +fi + + +# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. +DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"' + +# Collect all arguments for the java command: +# * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments, +# and any embedded shellness will be escaped. +# * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be +# treated as '${Hostname}' itself on the command line. + +set -- \ + "-Dorg.gradle.appname=$APP_BASE_NAME" \ + -classpath "$CLASSPATH" \ + org.gradle.wrapper.GradleWrapperMain \ + "$@" + +# Stop when "xargs" is not available. +if ! command -v xargs >/dev/null 2>&1 +then + die "xargs is not available" +fi + +# Use "xargs" to parse quoted args. +# +# With -n1 it outputs one arg per line, with the quotes and backslashes removed. +# +# In Bash we could simply go: +# +# readarray ARGS < <( xargs -n1 <<<"$var" ) && +# set -- "${ARGS[@]}" "$@" +# +# but POSIX shell has neither arrays nor command substitution, so instead we +# post-process each arg (as a line of input to sed) to backslash-escape any +# character that might be a shell metacharacter, then use eval to reverse +# that process (while maintaining the separation between arguments), and wrap +# the whole thing up as a single "set" statement. +# +# This will of course break if any of these variables contains a newline or +# an unmatched quote. +# + +eval "set -- $( + printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" | + xargs -n1 | + sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' | + tr '\n' ' ' + )" '"$@"' + +exec "$JAVACMD" "$@" diff --git a/gradlew.bat b/gradlew.bat new file mode 100644 index 000000000..93e3f59f1 --- /dev/null +++ b/gradlew.bat @@ -0,0 +1,92 @@ +@rem +@rem Copyright 2015 the original author or authors. +@rem +@rem Licensed under the Apache License, Version 2.0 (the "License"); +@rem you may not use this file except in compliance with the License. +@rem You may obtain a copy of the License at +@rem +@rem https://www.apache.org/licenses/LICENSE-2.0 +@rem +@rem Unless required by applicable law or agreed to in writing, software +@rem distributed under the License is distributed on an "AS IS" BASIS, +@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +@rem See the License for the specific language governing permissions and +@rem limitations under the License. +@rem + +@if "%DEBUG%"=="" @echo off +@rem ########################################################################## +@rem +@rem Gradle startup script for Windows +@rem +@rem ########################################################################## + +@rem Set local scope for the variables with windows NT shell +if "%OS%"=="Windows_NT" setlocal + +set DIRNAME=%~dp0 +if "%DIRNAME%"=="" set DIRNAME=. +@rem This is normally unused +set APP_BASE_NAME=%~n0 +set APP_HOME=%DIRNAME% + +@rem Resolve any "." and ".." in APP_HOME to make it shorter. +for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi + +@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script. +set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m" + +@rem Find java.exe +if defined JAVA_HOME goto findJavaFromJavaHome + +set JAVA_EXE=java.exe +%JAVA_EXE% -version >NUL 2>&1 +if %ERRORLEVEL% equ 0 goto execute + +echo. +echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. +echo. +echo Please set the JAVA_HOME variable in your environment to match the +echo location of your Java installation. + +goto fail + +:findJavaFromJavaHome +set JAVA_HOME=%JAVA_HOME:"=% +set JAVA_EXE=%JAVA_HOME%/bin/java.exe + +if exist "%JAVA_EXE%" goto execute + +echo. +echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% +echo. +echo Please set the JAVA_HOME variable in your environment to match the +echo location of your Java installation. + +goto fail + +:execute +@rem Setup the command line + +set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar + + +@rem Execute Gradle +"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %* + +:end +@rem End local scope for the variables with windows NT shell +if %ERRORLEVEL% equ 0 goto mainEnd + +:fail +rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of +rem the _cmd.exe /c_ return code! +set EXIT_CODE=%ERRORLEVEL% +if %EXIT_CODE% equ 0 set EXIT_CODE=1 +if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE% +exit /b %EXIT_CODE% + +:mainEnd +if "%OS%"=="Windows_NT" endlocal + +:omega diff --git a/settings.gradle b/settings.gradle new file mode 100644 index 000000000..e4d4a3bd0 --- /dev/null +++ b/settings.gradle @@ -0,0 +1 @@ +rootProject.name = 'weeklyjpa' diff --git a/src/main/java/com/sehee/weeklyjpa/WeeklyjpaApplication.java b/src/main/java/com/sehee/weeklyjpa/WeeklyjpaApplication.java new file mode 100644 index 000000000..51809f541 --- /dev/null +++ b/src/main/java/com/sehee/weeklyjpa/WeeklyjpaApplication.java @@ -0,0 +1,13 @@ +package com.sehee.weeklyjpa; + +import org.springframework.boot.SpringApplication; +import org.springframework.boot.autoconfigure.SpringBootApplication; + +@SpringBootApplication +public class WeeklyjpaApplication { + + public static void main(String[] args) { + SpringApplication.run(WeeklyjpaApplication.class, args); + } + +} diff --git a/src/main/java/com/sehee/weeklyjpa/config/DataSourceConfig.java b/src/main/java/com/sehee/weeklyjpa/config/DataSourceConfig.java new file mode 100644 index 000000000..83ea4281c --- /dev/null +++ b/src/main/java/com/sehee/weeklyjpa/config/DataSourceConfig.java @@ -0,0 +1,68 @@ +package com.sehee.weeklyjpa.config; + +import org.springframework.boot.autoconfigure.jdbc.DataSourceProperties; +import org.springframework.boot.autoconfigure.orm.jpa.JpaProperties; +import org.springframework.context.annotation.Bean; +import org.springframework.context.annotation.Configuration; +import org.springframework.data.jpa.repository.config.EnableJpaRepositories; +import org.springframework.jdbc.datasource.DriverManagerDataSource; +import org.springframework.orm.jpa.JpaTransactionManager; +import org.springframework.orm.jpa.JpaVendorAdapter; +import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean; +import org.springframework.orm.jpa.vendor.AbstractJpaVendorAdapter; +import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter; +import org.springframework.transaction.PlatformTransactionManager; + +import javax.sql.DataSource; +import java.util.Properties; + +@Configuration +@EnableJpaRepositories("com.sehee.weeklyjpa.domain") +public class DataSourceConfig { + @Bean + public DataSource dataSource(DataSourceProperties dataSourceProperties) { + DriverManagerDataSource dataSource = new DriverManagerDataSource(); + dataSource.setDriverClassName(dataSourceProperties.determineDriverClassName()); + dataSource.setUrl(dataSourceProperties.getUrl()); + dataSource.setUsername(dataSourceProperties.getUsername()); + dataSource.setPassword(dataSourceProperties.getPassword()); + + return dataSource; + } + + @Bean + public JpaVendorAdapter jpaVendorAdapter(JpaProperties jpaProperties) { + AbstractJpaVendorAdapter adapter = new HibernateJpaVendorAdapter(); + adapter.setShowSql(jpaProperties.isShowSql()); + adapter.setDatabasePlatform(jpaProperties.getDatabasePlatform()); + adapter.setGenerateDdl(jpaProperties.isGenerateDdl()); + + return adapter; + } + + @Bean + public LocalContainerEntityManagerFactoryBean entityManagerFactory( + DataSource dataSource, + JpaVendorAdapter jpaVendorAdapter, + JpaProperties jpaProperties + ) { + LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean(); + em.setDataSource(dataSource); + em.setPackagesToScan("com.sehee.weeklyjpa.domain"); + em.setJpaVendorAdapter(jpaVendorAdapter); + + Properties properties = new Properties(); + properties.putAll(jpaProperties.getProperties()); + em.setJpaProperties(properties); + + return em; + } + + @Bean + public PlatformTransactionManager transactionManager(LocalContainerEntityManagerFactoryBean entityManagerFactory) { + JpaTransactionManager transactionManager = new JpaTransactionManager(); + transactionManager.setEntityManagerFactory(entityManagerFactory.getObject()); + + return transactionManager; + } +} diff --git a/src/main/java/com/sehee/weeklyjpa/domain/BaseEntity.java b/src/main/java/com/sehee/weeklyjpa/domain/BaseEntity.java new file mode 100644 index 000000000..494c274be --- /dev/null +++ b/src/main/java/com/sehee/weeklyjpa/domain/BaseEntity.java @@ -0,0 +1,19 @@ +package com.sehee.weeklyjpa.domain; + +import jakarta.persistence.Column; +import jakarta.persistence.MappedSuperclass; +import lombok.Getter; +import lombok.Setter; + +import java.time.LocalDateTime; + +@Getter +@Setter +@MappedSuperclass +public class BaseEntity { + @Column(name = "created_by") + private String createdBy; + + @Column(name = "created_at", columnDefinition = "TIMESTAMP") + private LocalDateTime createdAt; +} diff --git a/src/main/java/com/sehee/weeklyjpa/domain/customer/Customer.java b/src/main/java/com/sehee/weeklyjpa/domain/customer/Customer.java new file mode 100644 index 000000000..44b291855 --- /dev/null +++ b/src/main/java/com/sehee/weeklyjpa/domain/customer/Customer.java @@ -0,0 +1,39 @@ +package com.sehee.weeklyjpa.domain.customer; + +import com.sehee.weeklyjpa.domain.BaseEntity; +import jakarta.persistence.Entity; +import jakarta.persistence.Id; +import jakarta.persistence.Table; + +@Entity +@Table(name = "customers") +public class Customer extends BaseEntity { + @Id + private long id; + private String lastName; + private String firstName; + + public long getId() { + return id; + } + + public void setId(long id) { + this.id = id; + } + + public String getLastName() { + return lastName; + } + + public void setLastName(String lastName) { + this.lastName = lastName; + } + + public String getFirstName() { + return firstName; + } + + public void setFirstName(String firstName) { + this.firstName = firstName; + } +} diff --git a/src/main/java/com/sehee/weeklyjpa/domain/customer/CustomerRepository.java b/src/main/java/com/sehee/weeklyjpa/domain/customer/CustomerRepository.java new file mode 100644 index 000000000..edcebccb1 --- /dev/null +++ b/src/main/java/com/sehee/weeklyjpa/domain/customer/CustomerRepository.java @@ -0,0 +1,7 @@ +package com.sehee.weeklyjpa.domain.customer; + +import com.sehee.weeklyjpa.domain.customer.Customer; +import org.springframework.data.jpa.repository.JpaRepository; + +public interface CustomerRepository extends JpaRepository { +} diff --git a/src/main/java/com/sehee/weeklyjpa/domain/order/Member.java b/src/main/java/com/sehee/weeklyjpa/domain/order/Member.java new file mode 100644 index 000000000..67bcd23af --- /dev/null +++ b/src/main/java/com/sehee/weeklyjpa/domain/order/Member.java @@ -0,0 +1,40 @@ +package com.sehee.weeklyjpa.domain.order; + +import com.sehee.weeklyjpa.domain.BaseEntity; +import jakarta.persistence.*; +import lombok.Getter; +import lombok.Setter; + +import java.util.ArrayList; +import java.util.List; + +@Entity +@Table(name = "member") +@Getter +@Setter +public class Member extends BaseEntity { + @Id + @GeneratedValue(strategy = GenerationType.AUTO) + private Long id; + + @Column(name = "name", nullable = false, length = 30) + private String name; + + @Column(nullable = false, length = 30, unique = true) + private String nickName; + + private int age; + + @Column(name = "address", nullable = false) + private String address; + + @Column(name = "description", nullable = true) + private String description; + + @OneToMany(mappedBy = "member", fetch = FetchType.LAZY, cascade = CascadeType.ALL, orphanRemoval = true) + private List orders = new ArrayList<>(); + + public void addOrder(Order order) { + order.setMember(this); + } +} diff --git a/src/main/java/com/sehee/weeklyjpa/domain/order/Order.java b/src/main/java/com/sehee/weeklyjpa/domain/order/Order.java new file mode 100644 index 000000000..52937d4b0 --- /dev/null +++ b/src/main/java/com/sehee/weeklyjpa/domain/order/Order.java @@ -0,0 +1,48 @@ +package com.sehee.weeklyjpa.domain.order; + +import com.sehee.weeklyjpa.domain.BaseEntity; +import jakarta.persistence.*; +import lombok.Getter; +import lombok.Setter; + +import java.time.LocalDateTime; +import java.util.List; +import java.util.Objects; + +@Entity +@Table(name = "orders") +@Getter +@Setter +public class Order extends BaseEntity { + @Id + @Column(name = "id") + private String uuid; + + @Column(name = "order_datetime", columnDefinition = "TIMESTAMP") + private LocalDateTime orderDatetime; + + @Enumerated(EnumType.STRING) + private OrderStatus orderStatus; + + @Lob + private String memo; + + @ManyToOne(fetch = FetchType.LAZY) + @JoinColumn(name = "member_id", referencedColumnName = "id") + private Member member; + + @OneToMany(mappedBy = "order", fetch = FetchType.LAZY) + private List orderItems; + + public void setMember(Member member) { + if (Objects.nonNull(this.member)) { + this.member.getOrders().remove(this); + } + this.member = member; + member.getOrders().add(this); + } + + public void addOrderItem(OrderItem orderItem) { + orderItem.setOrder(this); + } +} diff --git a/src/main/java/com/sehee/weeklyjpa/domain/order/OrderItem.java b/src/main/java/com/sehee/weeklyjpa/domain/order/OrderItem.java new file mode 100644 index 000000000..252847ccb --- /dev/null +++ b/src/main/java/com/sehee/weeklyjpa/domain/order/OrderItem.java @@ -0,0 +1,47 @@ +package com.sehee.weeklyjpa.domain.order; + +import com.sehee.weeklyjpa.domain.BaseEntity; +import com.sehee.weeklyjpa.domain.order.item.Item; +import jakarta.persistence.*; +import lombok.Getter; +import lombok.Setter; + +import java.util.Objects; + +@Entity +@Table(name = "order_item") +@Getter +@Setter +public class OrderItem extends BaseEntity { + + @Id + @GeneratedValue(strategy = GenerationType.AUTO) + private Long id; + + private int price; + private int quantity; + + @ManyToOne(fetch = FetchType.LAZY) + @JoinColumn(name = "order_id", referencedColumnName = "id") + private Order order; + + @ManyToOne(fetch = FetchType.LAZY) + @JoinColumn(name = "item_id", referencedColumnName = "id") + private Item item; + + public void setOrder(Order order) { + if (Objects.nonNull(this.order)) { + this.order.getOrderItems().remove(this); + } + this.order = order; + order.getOrderItems().add(this); + } + + public void setItem(Item item) { + if (Objects.nonNull(this.item)) { + this.item.getOrderItems().remove(this); + } + this.item = item; + item.getOrderItems().add(this); + } +} diff --git a/src/main/java/com/sehee/weeklyjpa/domain/order/OrderStatus.java b/src/main/java/com/sehee/weeklyjpa/domain/order/OrderStatus.java new file mode 100644 index 000000000..94f8de3b2 --- /dev/null +++ b/src/main/java/com/sehee/weeklyjpa/domain/order/OrderStatus.java @@ -0,0 +1,5 @@ +package com.sehee.weeklyjpa.domain.order; + +public enum OrderStatus { + OPENED, CANCELLED +} diff --git a/src/main/java/com/sehee/weeklyjpa/domain/order/item/Car.java b/src/main/java/com/sehee/weeklyjpa/domain/order/item/Car.java new file mode 100644 index 000000000..7d39a80ae --- /dev/null +++ b/src/main/java/com/sehee/weeklyjpa/domain/order/item/Car.java @@ -0,0 +1,14 @@ +package com.sehee.weeklyjpa.domain.order.item; + +import jakarta.persistence.DiscriminatorValue; +import jakarta.persistence.Entity; +import lombok.Getter; +import lombok.Setter; + +@Entity +@Getter +@Setter +@DiscriminatorValue("CAR") +public class Car extends Item { + private long power; +} diff --git a/src/main/java/com/sehee/weeklyjpa/domain/order/item/Food.java b/src/main/java/com/sehee/weeklyjpa/domain/order/item/Food.java new file mode 100644 index 000000000..5fb42b6a5 --- /dev/null +++ b/src/main/java/com/sehee/weeklyjpa/domain/order/item/Food.java @@ -0,0 +1,14 @@ +package com.sehee.weeklyjpa.domain.order.item; + +import jakarta.persistence.DiscriminatorValue; +import jakarta.persistence.Entity; +import lombok.Getter; +import lombok.Setter; + +@Entity +@Getter +@Setter +@DiscriminatorValue("FOOD") +public class Food extends Item { + private String chef; +} diff --git a/src/main/java/com/sehee/weeklyjpa/domain/order/item/Furniture.java b/src/main/java/com/sehee/weeklyjpa/domain/order/item/Furniture.java new file mode 100644 index 000000000..e92123de7 --- /dev/null +++ b/src/main/java/com/sehee/weeklyjpa/domain/order/item/Furniture.java @@ -0,0 +1,15 @@ +package com.sehee.weeklyjpa.domain.order.item; + +import jakarta.persistence.DiscriminatorValue; +import jakarta.persistence.Entity; +import lombok.Getter; +import lombok.Setter; + +@Entity +@Getter +@Setter +@DiscriminatorValue("FURNITURE") +public class Furniture extends Item { + private long width; + private long height; +} diff --git a/src/main/java/com/sehee/weeklyjpa/domain/order/item/Item.java b/src/main/java/com/sehee/weeklyjpa/domain/order/item/Item.java new file mode 100644 index 000000000..4dd588956 --- /dev/null +++ b/src/main/java/com/sehee/weeklyjpa/domain/order/item/Item.java @@ -0,0 +1,31 @@ +package com.sehee.weeklyjpa.domain.order.item; + +import com.sehee.weeklyjpa.domain.BaseEntity; +import com.sehee.weeklyjpa.domain.order.OrderItem; +import jakarta.persistence.*; +import lombok.Getter; +import lombok.Setter; + +import java.util.List; + +@Entity +@Table(name = "item") +@Getter +@Setter +@Inheritance(strategy = InheritanceType.SINGLE_TABLE) +@DiscriminatorColumn(name = "TYPE") +public class Item extends BaseEntity { + @Id + @GeneratedValue(strategy = GenerationType.AUTO) + private Long id; + + private int price; + private int stockQuantity; + + @OneToMany(mappedBy = "item", fetch = FetchType.LAZY) + private List orderItems; + + public void addOrderItem(OrderItem orderItem) { + orderItem.setItem(this); + } +} diff --git a/src/main/java/com/sehee/weeklyjpa/domain/parent/Parent.java b/src/main/java/com/sehee/weeklyjpa/domain/parent/Parent.java new file mode 100644 index 000000000..0e1a25d40 --- /dev/null +++ b/src/main/java/com/sehee/weeklyjpa/domain/parent/Parent.java @@ -0,0 +1,19 @@ +package com.sehee.weeklyjpa.domain.parent; + +import com.sehee.weeklyjpa.domain.BaseEntity; +import jakarta.persistence.Entity; +import jakarta.persistence.Id; +import jakarta.persistence.IdClass; +import lombok.Getter; +import lombok.Setter; + +@Getter +@Setter +@Entity +@IdClass(ParentId.class) +public class Parent extends BaseEntity { + @Id + private String id1; + @Id + private String id2; +} diff --git a/src/main/java/com/sehee/weeklyjpa/domain/parent/Parent2.java b/src/main/java/com/sehee/weeklyjpa/domain/parent/Parent2.java new file mode 100644 index 000000000..022a61c09 --- /dev/null +++ b/src/main/java/com/sehee/weeklyjpa/domain/parent/Parent2.java @@ -0,0 +1,15 @@ +package com.sehee.weeklyjpa.domain.parent; + +import com.sehee.weeklyjpa.domain.BaseEntity; +import jakarta.persistence.EmbeddedId; +import jakarta.persistence.Entity; +import lombok.Getter; +import lombok.Setter; + +@Getter +@Setter +@Entity +public class Parent2 extends BaseEntity { + @EmbeddedId + private ParentId id; +} diff --git a/src/main/java/com/sehee/weeklyjpa/domain/parent/ParentId.java b/src/main/java/com/sehee/weeklyjpa/domain/parent/ParentId.java new file mode 100644 index 000000000..ac28fc1a8 --- /dev/null +++ b/src/main/java/com/sehee/weeklyjpa/domain/parent/ParentId.java @@ -0,0 +1,17 @@ +package com.sehee.weeklyjpa.domain.parent; + +import jakarta.persistence.Embeddable; +import lombok.*; + +import java.io.Serializable; + +@Getter +@Setter +@EqualsAndHashCode +@NoArgsConstructor +@AllArgsConstructor +@Embeddable +public class ParentId implements Serializable { + private String id1; + private String id2; +} diff --git a/src/main/resources/application.yaml b/src/main/resources/application.yaml new file mode 100644 index 000000000..ef21cb1ae --- /dev/null +++ b/src/main/resources/application.yaml @@ -0,0 +1,18 @@ + +spring: + datasource: + url: jdbc:mysql://localhost:3308/weeklyjpa + username: root + password: root + driver-class-name: "com.mysql.cj.jdbc.Driver" + jpa: + generate-ddl: true + database: mysql + show-sql: true + open-in-view: false + properties: + hibernate: + format_sql: true + query.in_clause_parameter_padding: true + hbm2ddl: + auto: create-drop \ No newline at end of file diff --git a/src/test/java/com/sehee/weeklyjpa/CustomerRepositoryTest.java b/src/test/java/com/sehee/weeklyjpa/CustomerRepositoryTest.java new file mode 100644 index 000000000..65c733b46 --- /dev/null +++ b/src/test/java/com/sehee/weeklyjpa/CustomerRepositoryTest.java @@ -0,0 +1,80 @@ +package com.sehee.weeklyjpa; + +import com.sehee.weeklyjpa.domain.customer.Customer; +import com.sehee.weeklyjpa.domain.customer.CustomerRepository; +import lombok.extern.slf4j.Slf4j; +import org.junit.jupiter.api.AfterEach; +import org.junit.jupiter.api.BeforeEach; +import org.junit.jupiter.api.DisplayName; +import org.junit.jupiter.api.Test; +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.boot.test.context.SpringBootTest; +import org.springframework.transaction.annotation.Transactional; + +import java.util.Optional; + +import static org.assertj.core.api.Assertions.assertThat; + +@Slf4j +@SpringBootTest +public class CustomerRepositoryTest { + @Autowired + CustomerRepository repository; + + Customer customer; + + @BeforeEach + void setUp() { + customer = new Customer(); + customer.setId(1L); + customer.setFirstName("Sehee"); + customer.setLastName("Lee"); + } + + @AfterEach + void tearDown() { + repository.deleteAll(); + } + + @Test + @DisplayName("고객을 저장하고 조회할 수 있다.") + void insertTest() { + //When + repository.save(customer); + + //Then + Customer retrievedCustomer = repository.findById(customer.getId()).get(); + log.info("{} {}", retrievedCustomer.getFirstName(), retrievedCustomer.getLastName()); + } + + @Test + @Transactional + @DisplayName("고객을 업데이트할 수 있다.") + void updateTest() { + //Given + repository.save(customer); + + //When + Customer retrievedCustomer = repository.findById(customer.getId()).get(); + retrievedCustomer.setLastName("Kim"); + + //Then + Customer updatedCustomer = repository.findById(customer.getId()).get(); + log.info("{} {}", updatedCustomer.getFirstName(), updatedCustomer.getLastName()); + } + + @Test + @Transactional + @DisplayName("고객을 삭제할 수 있다.") + void deleteTest() { + //Given + repository.save(customer); + + //When + repository.delete(customer); + + //Then + Optional customerOptional = repository.findById(customer.getId()); + assertThat(customerOptional).isEmpty(); + } +} diff --git a/src/test/java/com/sehee/weeklyjpa/MappingTest.java b/src/test/java/com/sehee/weeklyjpa/MappingTest.java new file mode 100644 index 000000000..0b045b8ff --- /dev/null +++ b/src/test/java/com/sehee/weeklyjpa/MappingTest.java @@ -0,0 +1,58 @@ +package com.sehee.weeklyjpa; + +import com.sehee.weeklyjpa.domain.parent.Parent; +import com.sehee.weeklyjpa.domain.parent.Parent2; +import com.sehee.weeklyjpa.domain.parent.ParentId; +import jakarta.persistence.EntityManager; +import jakarta.persistence.EntityManagerFactory; +import jakarta.persistence.EntityTransaction; +import lombok.extern.slf4j.Slf4j; +import org.junit.jupiter.api.BeforeEach; +import org.junit.jupiter.api.DisplayName; +import org.junit.jupiter.api.Test; +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.boot.test.context.SpringBootTest; + +@Slf4j +@SpringBootTest +public class MappingTest { + @Autowired + EntityManagerFactory entityManagerFactory; + EntityManager entityManager; + EntityTransaction transaction; + + + @BeforeEach + void setUp() { + entityManager = entityManagerFactory.createEntityManager(); + transaction = entityManager.getTransaction(); + } + + @Test + @DisplayName("IdClass로 다중 식별자 구현") + void idClassTest() { + transaction.begin(); + Parent parent = new Parent(); + parent.setId1("id1"); + parent.setId2("id2"); + entityManager.persist(parent); + transaction.commit(); + + Parent retrievedEntity = entityManager.find(Parent.class, new ParentId(parent.getId1(), parent.getId2())); + log.info("{} {}", retrievedEntity.getId1(), retrievedEntity.getId2()); + } + + @Test + @DisplayName("EmbeddedId로 다중 식별자 구현") + void embeddedIdTest() { + transaction.begin(); + Parent2 parent2 = new Parent2(); + parent2.setId(new ParentId("id1", "id2")); + entityManager.persist(parent2); + transaction.commit(); + + Parent2 retrievedEntity = entityManager.find(Parent2.class, parent2.getId()); + ParentId parentId = retrievedEntity.getId(); + log.info("{} {}", parentId.getId1(), parentId.getId2()); + } +} diff --git a/src/test/java/com/sehee/weeklyjpa/OrderPersistenceTest.java b/src/test/java/com/sehee/weeklyjpa/OrderPersistenceTest.java new file mode 100644 index 000000000..311f00871 --- /dev/null +++ b/src/test/java/com/sehee/weeklyjpa/OrderPersistenceTest.java @@ -0,0 +1,113 @@ +package com.sehee.weeklyjpa; + +import com.sehee.weeklyjpa.domain.order.Member; +import com.sehee.weeklyjpa.domain.order.Order; +import jakarta.persistence.EntityManager; +import jakarta.persistence.EntityManagerFactory; +import jakarta.persistence.EntityTransaction; +import lombok.extern.slf4j.Slf4j; +import org.junit.jupiter.api.BeforeEach; +import org.junit.jupiter.api.DisplayName; +import org.junit.jupiter.api.Test; +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.boot.test.context.SpringBootTest; + +import java.time.LocalDateTime; +import java.util.UUID; + +import static com.sehee.weeklyjpa.domain.order.OrderStatus.OPENED; +import static org.assertj.core.api.Assertions.assertThat; + +@Slf4j +@SpringBootTest +public class OrderPersistenceTest { + @Autowired + EntityManagerFactory entityManagerFactory; + EntityManager entityManager; + EntityTransaction transaction; + Order order; + Member member; + + @BeforeEach + void setUp() { + entityManager = entityManagerFactory.createEntityManager(); + transaction = entityManager.getTransaction(); + } + + void persistNewOrderWithoutMemberAndOrderItem() { + order = new Order(); + order.setUuid(UUID.randomUUID().toString()); + order.setMemo("This is memo."); + order.setOrderDatetime(LocalDateTime.now()); + order.setOrderStatus(OPENED); + + entityManager.persist(order); + log.info("persist order!"); + } + + void persistNewMemberWithoutOrder() { + member = new Member(); + member.setName("sehee"); + member.setNickName("LeeSehee"); + member.setAge(25); + member.setAddress("Seoul"); + member.setDescription("This is description."); + + entityManager.persist(member); + log.info("persist member!"); + } + + @Test + @DisplayName("양방향 관계 저장") + void mappingOrderAndMember() { + transaction.begin(); + persistNewOrderWithoutMemberAndOrderItem(); + persistNewMemberWithoutOrder(); + + order.setMember(member); // 둘 다 세팅 + member.getOrders().add(order); // 둘 다 세팅 + + transaction.commit(); + + Member member1 = entityManager.find(Order.class, order.getUuid()).getMember(); + assertThat(member1.getId()).isEqualTo(member.getId()); + } + + @Test + @DisplayName("편의메소드를 이용하여 양방향 관계 저장") + void mappingOrderAndMemberWithMethod() { + transaction.begin(); + persistNewOrderWithoutMemberAndOrderItem(); + persistNewMemberWithoutOrder(); + + member.addOrder(order); // 한 번만 세팅 + + transaction.commit(); + + Member member1 = entityManager.find(Order.class, order.getUuid()).getMember(); + assertThat(member1.getId()).isEqualTo(member.getId()); + } + + @Test + @DisplayName("객체 그래프 탐색을 이용한 조회") + void readBySearchingObjectGraph() { + transaction.begin(); + persistNewOrderWithoutMemberAndOrderItem(); + persistNewMemberWithoutOrder(); + order.setMember(member); // 주문 -> 회원만 보기 가능한 상태. 직접 만든 setMember가 아니라 기본 setter로 해야합니당. + transaction.commit(); + + entityManager.clear(); // order -> 준영속 상태 + + Member retrievedMember = entityManager.find(Member.class, member.getId()); + assertThat(retrievedMember.getId()).isEqualTo(member.getId()); + + Order retrievedOrder = entityManager.find(Order.class, order.getUuid()); + assertThat(retrievedOrder.getUuid()).isEqualTo(order.getUuid()); + + log.info("{} and {}", order.getMember().getOrders().size(), entityManager.contains(order)); // order -> 준영속 상태 +// assertThat(member.getOrders().size()).isEqualTo(0); // member에는 등록되지 않았다. + log.info("{}", retrievedOrder.getMember().getOrders().size()); // 그래프 탐색 + commit 된 후 불러온 것에는 자동으로 되어있다. + log.info("{}", retrievedMember.getOrders().size()); // 그래프 탐색 + commit 된 후 불러온 것에는 자동으로 되어있다. + } +} diff --git a/src/test/java/com/sehee/weeklyjpa/PersistenceContextTest.java b/src/test/java/com/sehee/weeklyjpa/PersistenceContextTest.java new file mode 100644 index 000000000..6a41d0416 --- /dev/null +++ b/src/test/java/com/sehee/weeklyjpa/PersistenceContextTest.java @@ -0,0 +1,138 @@ +package com.sehee.weeklyjpa; + +import com.sehee.weeklyjpa.domain.customer.Customer; +import com.sehee.weeklyjpa.domain.customer.CustomerRepository; +import jakarta.persistence.EntityManager; +import jakarta.persistence.EntityManagerFactory; +import jakarta.persistence.EntityTransaction; +import lombok.extern.slf4j.Slf4j; +import org.junit.jupiter.api.BeforeEach; +import org.junit.jupiter.api.DisplayName; +import org.junit.jupiter.api.Test; +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.boot.test.context.SpringBootTest; + +@Slf4j +@SpringBootTest +public class PersistenceContextTest { + @Autowired + CustomerRepository repository; + + @Autowired + EntityManagerFactory entityManagerFactory; + EntityManager entityManager; + EntityTransaction transaction; + Customer customer; + + @BeforeEach + void setUp() { + repository.deleteAll(); + entityManager = entityManagerFactory.createEntityManager(); + transaction = entityManager.getTransaction(); + } + + void persistNewCustomer() { + customer = new Customer(); + customer.setId(1L); + customer.setLastName("sehee"); + customer.setFirstName("Lee"); + entityManager.persist(customer); + log.info("persist!"); + } + + @Test + @DisplayName("트랜젝션 커밋으로 새로 생성된 엔티티를 저장할 수 있다.") + void saveByTransaction() { + persistNewCustomer(); + + transaction.begin(); + transaction.commit(); + log.info("COMMIT & FLUSH!"); + +// 사실상 "커밋 전"에 영속 상태이면 트랜잭션 안이 아니라도 커밋된다. + log.info("[entityManager.contains] {}", entityManager.contains(customer)); // 영속 상태 + } + + @Test + @DisplayName("엔티티 매니저 flush로 새로 생성된 엔티티를 동기화할 수 있다.") + void syncDbByFlush() { + transaction.begin(); + persistNewCustomer(); + + Customer retrievedCustomer = entityManager.find(Customer.class, customer.getId()); // 쿼리 출력X(캐시) + log.info("[retrivedCustomer] {} {}", retrievedCustomer.getFirstName(), retrievedCustomer.getLastName()); // Lee sehee + + entityManager.flush(); // TransactionRequiredException: 트랜잭션이 시작 안되면 발생 + log.info("FLUSH!"); // 쿼리 출력(저장은 안되고 DB 동기화가 일어나는 것 같다. DB에 안보임.) + +// repository.findById(customer.getId()).get(); // NoSuchElementException + customer.setFirstName("kang"); // 영속성 컨텍스트, 1차 캐시에는 반영. DB 동기화 반영이 안됨. + Customer retrievedCustomer2 = entityManager.find(Customer.class, customer.getId()); // 쿼리 출력X + log.info("[retrievedCustomer2] {} {}", retrievedCustomer2.getFirstName(), retrievedCustomer2.getLastName()); // kang sehee + + entityManager.detach(customer); // 1차 캐시에서 조회 못하도록 준영속 상태 + log.info("[Does customer managed at persist context?] {}", entityManager.contains(customer)); + Customer retrievedCustomer3 = entityManager.find(Customer.class, customer.getId()); // 쿼리는 출력(실제 DB에는 저장되지 않은 상태. DB 트랜잭션 작업에 동기화만 된 것이다.) + log.info("[retrievedCustomer3] {} {}", retrievedCustomer3.getFirstName(), retrievedCustomer3.getLastName()); // Lee sehee + + transaction.commit(); + log.info("COMMIT! REAL SAVE!"); // 이 시점에 실제 DB에 보인다. 커밋이 되어야 실제 DB에 저장된다. + repository.findById(customer.getId()).get(); + } + + @Test + @DisplayName("1차 캐시에서 조회가 가능하다") + void findInFirstCache() { + transaction.begin(); + persistNewCustomer(); + transaction.commit(); // 커밋 되고 영속 상태. 1차 캐시에 저장, DB 저장 + log.info("COMMIT & FLUSH!"); + + entityManager.find(Customer.class, customer.getId()); // 레포지토리 아님. 쿼리 출력X + } + + @Test + @DisplayName("1차 캐시가 아닌 DB에서 조회가 가능하다") + void findInDB() { + + transaction.begin(); + persistNewCustomer(); + transaction.commit(); // 커밋 되고 영속 상태. 1차 캐시에 저장, DB 저장. + log.info("COMMIT & FLUSH!"); + + entityManager.detach(customer); // 준영속 상태. 1차 캐시 저장 X. DB 저장. + log.info("DETACH!"); + log.info("[entityManager.contains] {}", entityManager.contains(customer)); // 준영속 상태 + + entityManager.find(Customer.class, customer.getId()); // 쿼리 출력 + } + @Test + @DisplayName("엔티티를 commit으로 업데이트 할 수 있다.") + void update() { + transaction.begin(); + persistNewCustomer(); + transaction.commit(); + log.info("COMMIT & FLUSH!"); + + transaction.begin(); + Customer retrievedCustomer = entityManager.find(Customer.class, customer.getId()); + retrievedCustomer.setFirstName("Kang"); + transaction.commit(); // dirty checking & DB에 자동으로 update + log.info("COMMIT & FLUSH!"); + } + @Test + @DisplayName("") + void delete() { + transaction.begin(); + persistNewCustomer(); + transaction.commit(); + log.info("COMMIT & FLUSH!"); + + transaction.begin(); + entityManager.remove(customer); // 삭제 + log.info("REMOVE(PERSIST CONTEXT)"); + log.info("[entityManager.contains] {}", entityManager.contains(customer)); + transaction.commit(); + log.info("COMMIT & FLUSH!"); + } +} diff --git a/src/test/java/com/sehee/weeklyjpa/ProxyTest.java b/src/test/java/com/sehee/weeklyjpa/ProxyTest.java new file mode 100644 index 000000000..9ba3f6dee --- /dev/null +++ b/src/test/java/com/sehee/weeklyjpa/ProxyTest.java @@ -0,0 +1,109 @@ +package com.sehee.weeklyjpa; + +import com.sehee.weeklyjpa.domain.order.Member; +import com.sehee.weeklyjpa.domain.order.Order; +import jakarta.persistence.EntityManager; +import jakarta.persistence.EntityManagerFactory; +import jakarta.persistence.EntityTransaction; +import lombok.extern.slf4j.Slf4j; +import org.hibernate.LazyInitializationException; +import org.junit.jupiter.api.BeforeEach; +import org.junit.jupiter.api.DisplayName; +import org.junit.jupiter.api.Test; +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.boot.test.context.SpringBootTest; + +import java.time.LocalDateTime; +import java.util.List; +import java.util.UUID; + +import static com.sehee.weeklyjpa.domain.order.OrderStatus.OPENED; +import static org.junit.jupiter.api.Assertions.assertThrows; + +@Slf4j +@SpringBootTest +public class ProxyTest { + @Autowired + EntityManagerFactory entityManagerFactory; + EntityManager entityManager; + EntityTransaction transaction; + Order order; + Member member; + + @BeforeEach + void setUp() { + entityManager = entityManagerFactory.createEntityManager(); + transaction = entityManager.getTransaction(); + transaction.begin(); + persistNewOrderWithoutMemberAndOrderItem(); + persistNewMemberWithoutOrder(); + order.setMember(member); + transaction.commit(); + } + + void persistNewOrderWithoutMemberAndOrderItem() { + order = new Order(); + order.setUuid(UUID.randomUUID().toString()); + order.setMemo("This is memo."); + order.setOrderDatetime(LocalDateTime.now()); + order.setOrderStatus(OPENED); + + entityManager.persist(order); + log.info("persist order!"); + } + + void persistNewMemberWithoutOrder() { + member = new Member(); + member.setName("sehee"); + member.setNickName("LeeSehee"); + member.setAge(25); + member.setAddress("Seoul"); + member.setDescription("This is description."); + + entityManager.persist(member); + log.info("persist member!"); + } + + @Test + @DisplayName("FetchType.LAZY일 때 프록시 객체 확인") + void proxy() { + entityManager.clear(); + log.info("clear"); + + Member retrievedMember = entityManager.find(Member.class, member.getId()); + log.info("load member"); + + List retrievedOrders = retrievedMember.getOrders(); // proxy + log.info("load order? {}", entityManagerFactory.getPersistenceUnitUtil().isLoaded(retrievedOrders)); + Order retrievedOrder = retrievedOrders.get(0); // LAZY: 여기서 쿼리 출력 + log.info("load order? {}", entityManagerFactory.getPersistenceUnitUtil().isLoaded(retrievedOrder)); + + } + + @Test + @DisplayName("프록시가 준영속 상태일 때 초기화 시도하면 LazyInitializationException 발생") + void proxy2() { + assertThrows(LazyInitializationException.class, () -> { + entityManager.clear(); // 1차 캐시 지우기 + Member retrievedMember = entityManager.find(Member.class, member.getId()); // 엔티티 + List proxyOrders = retrievedMember.getOrders(); // 프록시 + log.info("load order? {}", entityManagerFactory.getPersistenceUnitUtil().isLoaded(proxyOrders)); + entityManager.clear(); // 영속성 컨텍스트에서 엔티티 및 프록시 클리어 -> 프록시는 준영속 + log.info("detach retrievedMember"); + transaction.begin(); + transaction.commit(); // nothing happened + proxyOrders.get(0); // 초기화 -> LazyInitializationException + } + ); + } + + @Test + @DisplayName("orphanRemoval = true로 고아 객체 자동 삭제") + void orphan() { + Member retrievedMember = entityManager.find(Member.class, member.getId()); // Order도 영속화 + retrievedMember.getOrders().remove(0); // 0번 Order 고아 객체 자동 삭제 + + transaction.begin(); + transaction.commit(); // orphanRemoval = true이면 delete 쿼리가 보인다. + } +}