refactor : 스프링 이벤트 처리 예제 코드 spring-event 브랜치로부터 이관

2022-03-02 21:54:06 +09:00
parent 50596410b9
commit 842814eeb3
35 changed files with 1422 additions and 0 deletions
--- a/작성)/spring-event/.gitignore
+++ b/작성)/spring-event/.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/
--- a/작성)/spring-event/INDEX.md
+++ b/작성)/spring-event/INDEX.md
@@ -0,0 +1,39 @@
+### 🚀 step1
+
+- 현재 코드를 분석 하면서 어떤 점을 고치고 싶은지 니즈를 파악해본다.
+
+### 🚀 step2
+
+- 상속 기반의 이벤트로 변경 해본다.
+- 이벤트 객체를 만들기 위해 ApplicationEvent 를 상속 받아 데이터 전달을 위해 객체를 만들어본다.
+- 이벤트 객체로 부터 전달 받을 EventListener 구현체를 만들어본다.
+- ApplicationEventPublisher 를 주입 받아서 이벤트를 발행 시킨다.
+- 테스트 코드 작성
+  > Mockito 활용
+
+### 📖 살펴볼 객체
+
+- `AbstractApplicationContext` 를 intellij 의 diagram 을 통해서 구조를 살펴보면 `ApplicationEventPublisher` 를 상속 받고 있습니다.
+- `AbstractApplicationContext`::publishEvent 메소드를 보면 이벤트의 발행이 어떻게 되는지 알 수 있습니다.
+
+> 조금 설명을 드리면 위의 메소드 안에서 ApplicationEventMulticaster 를 주입 받아 이벤트를 실행 시키는데 구현체 중 `SimpleApplicationEventMulticater` 를 살펴보면 (위와 같이 다이어그램으로 표현) multicastEvent 메소드를 통해서 빈으로 등록된 이벤트 객체를 실행을 합니다
+
+### 🚀 step3
+
+- 추가 기능(어드민에서 쿠폰 및 환영 메시지를 보낼 수 있는 기능이 있다.)
+- `@EventListener` 어노테이션을 활용해 코드를 변경 해보자.
+    - > 스프링 4.2 부터 ApplicationEvent 를 상속 받아 객체를 생성하지 않아도 이벤트 객체 처럼 활용할 수 있다.  `ApplicationListenerMethodAdapter` 객체에서 어노테이션을 찾아서 실행
+- 어드민에 알람을 보내는 중에 예외처리를 해보자
+    - > `@TransactionalEventListener` 를 활용해 트랜잭션 단위를 제어해보자.
+- 비동기 활용
+    - > `@EnableAsync` 와 `@Async` 를 활용해 비동기 처리를 해보자.
+
+### 🚀 step4
+
+- Domain Event
+    - > AbstractAggregateRoot 를 상속 받아 이벤트를 제공
+    - > registerEvent 를 통해 jpa의 save 를 명시적으로 할 때 마다 이벤트를 발행
+
+---
+
+#### 출처 : https://github.com/tongnamuu/SpringEvent
--- a/작성)/spring-event/README.md
+++ b/작성)/spring-event/README.md
@@ -0,0 +1,24 @@
+# 프로젝트 세팅 #
+
+Java 11을 사용합니다.
+
+처음부터 세팅하고 싶다면
+![img.png](images/img.png)
+
+이후 annotation processing 옵션을 켜주세요
+![img_1.png](images/img_1.png)
+
+이후 프로젝트 repository의 커밋을 따라오시면 그대로 실습하실 수 있습니다.
+
+# 우리가 실습해볼 것 #
+
+- 회원 가입 api를 이벤트를 활용해 개선해 봅니다.
+- 회원가입 플로우는 아래와 같습니다.
+    - 회원가입을 하면 유저를 저장합니다
+    - 알람이 나갑니다
+    - 쿠폰을 발급해 줍니다
+    - 이메일과 SMS로 환영 메시지를 보냅니다
+
+---
+
+#### 출처 : https://github.com/tongnamuu/SpringEvent
--- a/작성)/spring-event/build.gradle.kts
+++ b/작성)/spring-event/build.gradle.kts
@@ -0,0 +1,46 @@
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+
+plugins {
+	id("java")
+	id("org.springframework.boot") version "2.6.1"
+	id("io.spring.dependency-management") version "1.0.11.RELEASE"
+	kotlin("jvm") version "1.6.0"
+	kotlin("plugin.spring") version "1.6.0"
+	kotlin("plugin.jpa") version "1.6.0"
+}
+
+group = "com.banjjoknim"
+version = "0.0.1-SNAPSHOT"
+java.sourceCompatibility = JavaVersion.VERSION_11
+
+repositories {
+	mavenCentral()
+}
+
+dependencies {
+	implementation("org.springframework.boot:spring-boot-starter-data-jpa")
+	implementation("org.springframework.boot:spring-boot-starter-validation")
+	implementation("org.springframework.boot:spring-boot-starter-web")
+	implementation("com.fasterxml.jackson.module:jackson-module-kotlin")
+	implementation("org.jetbrains.kotlin:kotlin-reflect")
+	implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8")
+	runtimeOnly("com.h2database:h2")
+	runtimeOnly("mysql:mysql-connector-java")
+	runtimeOnly("org.mariadb.jdbc:mariadb-java-client")
+	testImplementation("org.springframework.boot:spring-boot-starter-test")
+}
+
+tasks.withType<KotlinCompile> {
+	kotlinOptions {
+		freeCompilerArgs = listOf("-Xjsr305=strict")
+		jvmTarget = "11"
+	}
+}
+
+tasks.withType<Test> {
+	useJUnitPlatform()
+}
+
+tasks.named("jar") {
+	enabled = false
+}
--- a/작성)/spring-event/gradle/wrapper/gradle-wrapper.jar
+++ b/작성)/spring-event/gradle/wrapper/gradle-wrapper.jar
--- a/작성)/spring-event/gradle/wrapper/gradle-wrapper.properties
+++ b/작성)/spring-event/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.3.1-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
--- a/작성)/spring-event/gradlew
+++ b/작성)/spring-event/gradlew
@@ -0,0 +1,234 @@
+#!/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/master/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
+
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+APP_NAME="Gradle"
+APP_BASE_NAME=${0##*/}
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&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: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        ulimit -n "$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
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# 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 "$JAVACMD" "$@"
--- a/작성)/spring-event/gradlew.bat
+++ b/작성)/spring-event/gradlew.bat
@@ -0,0 +1,89 @@
+@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=.
+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%" == "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%"=="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!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
--- a/작성)/spring-event/images/img.png
+++ b/작성)/spring-event/images/img.png
--- a/작성)/spring-event/images/img_1.png
+++ b/작성)/spring-event/images/img_1.png
--- a/작성)/spring-event/settings.gradle.kts
+++ b/작성)/spring-event/settings.gradle.kts
@@ -0,0 +1 @@
+rootProject.name = "springEvent"
--- a/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/SpringEventApplication.kt
+++ b/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/SpringEventApplication.kt
@@ -0,0 +1,11 @@
+package com.banjjoknim.playground
+
+import org.springframework.boot.autoconfigure.SpringBootApplication
+import org.springframework.boot.runApplication
+
+@SpringBootApplication
+class SpringEventApplication
+
+fun main(args: Array<String>) {
+	runApplication<SpringEventApplication>(*args)
+}
--- a/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/common/ExceptionHandler.kt
+++ b/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/common/ExceptionHandler.kt
@@ -0,0 +1,41 @@
+package com.banjjoknim.playground.common
+
+import org.springframework.http.HttpHeaders
+import org.springframework.http.HttpStatus
+import org.springframework.http.ResponseEntity
+import org.springframework.web.bind.MethodArgumentNotValidException
+import org.springframework.web.bind.annotation.ExceptionHandler
+import org.springframework.web.bind.annotation.RestControllerAdvice
+import org.springframework.web.context.request.WebRequest
+import org.springframework.web.servlet.mvc.method.annotation.ResponseEntityExceptionHandler
+
+@RestControllerAdvice
+class ExceptionHandler : ResponseEntityExceptionHandler() {
+    override fun handleMethodArgumentNotValid(
+        ex: MethodArgumentNotValidException,
+        headers: HttpHeaders,
+        status: HttpStatus,
+        request: WebRequest
+    ): ResponseEntity<Any> {
+        logger.error("message", ex)
+        val errors = ex.fieldErrors.map { fieldError ->
+            mapOf(
+                ("propertyName" to fieldError.field),
+                ("reason" to fieldError.defaultMessage)
+            )
+        }
+        return ResponseEntity.badRequest().body(errors)
+    }
+
+    @ExceptionHandler(value = [NoSuchElementException::class])
+    fun handleNoSuchElement(ex: NoSuchElementException): ResponseEntity<String> {
+        logger.error("message", ex)
+        return ResponseEntity.status(HttpStatus.NOT_FOUND).body(ex.message)
+    }
+
+    @ExceptionHandler(value = [Exception::class])
+    fun handleException(ex: Exception): ResponseEntity<String> {
+        logger.error("message", ex)
+        return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(ex.message)
+    }
+}
--- a/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/config/AsyncConfiguration.kt
+++ b/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/config/AsyncConfiguration.kt
@@ -0,0 +1,19 @@
+package com.banjjoknim.playground.config
+
+import org.springframework.context.annotation.Configuration
+import org.springframework.scheduling.annotation.EnableAsync
+
+/**
+ * ```
+ * @EnableAsync 어노테이션을 이용해서 비동기 설정을 활성화할 수 있다.
+ *
+ * 비동기 설정을 활성화했다면, 비동기로 실행할 이벤트 리스너에 @Async 어노테이션을 붙이면 된다.
+ * ```
+ *
+ * @see EnableAsync
+ * @see Async
+ */
+@EnableAsync
+@Configuration
+class AsyncConfiguration {
+}
--- a/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/domain/admin/AdminService.kt
+++ b/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/domain/admin/AdminService.kt
@@ -0,0 +1,13 @@
+package com.banjjoknim.playground.domain.admin
+
+import org.slf4j.LoggerFactory
+import org.springframework.stereotype.Service
+
+@Service
+class AdminService {
+    private val log = LoggerFactory.getLogger(this::class.java)
+
+    fun alarm(username: String) {
+        log.info("어드민 서비스 : {}님이 가입했습니다.", username)
+    }
+}
--- a/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/domain/admin/CouponService.kt
+++ b/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/domain/admin/CouponService.kt
@@ -0,0 +1,13 @@
+package com.banjjoknim.playground.domain.admin
+
+import org.slf4j.LoggerFactory
+import org.springframework.stereotype.Service
+
+@Service
+class CouponService {
+    private val log = LoggerFactory.getLogger(this::class.java)
+
+    fun registerCoupon(email: String) {
+        log.info("쿠폰 등록 완료 : {}", email)
+    }
+}
--- a/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/domain/event/AggregateRootEvent.kt
+++ b/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/domain/event/AggregateRootEvent.kt
@@ -0,0 +1,30 @@
+package com.banjjoknim.playground.domain.user
+
+import org.springframework.data.domain.AbstractAggregateRoot
+import javax.persistence.Entity
+import javax.persistence.GeneratedValue
+import javax.persistence.GenerationType
+import javax.persistence.Id
+
+/**
+ * ```
+ * AbstractAggregateRoot<T> 를 이용하면 쉽게 이벤트를 구현할 수 있다.
+ *
+ * 단, 명시적으로 AggregateRootRepository<T, ID> 에서 save()가 호출되어야 이벤트가 발행된다.
+ * ```
+ * @see AbstractAggregateRoot
+ */
+@Entity
+class AggregateRootUser(
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    val id: Long = 0L
+) : AbstractAggregateRoot<AggregateRootUser>() {
+
+    // AggregateRootUser Entity를 사용하는 AggregateRootUserRepository 에서 명시적으로 save() 가 호출되면 이벤트가 발행된다.
+    fun publishAggregateRootEvent() {
+        super.registerEvent(AggregateRootEvent("colt"))
+    }
+
+    data class AggregateRootEvent(val name: String)
+}
--- a/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/domain/event/BaseOnAnnotationEventListeners.kt
+++ b/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/domain/event/BaseOnAnnotationEventListeners.kt
@@ -0,0 +1,164 @@
+package com.banjjoknim.playground.domain.event
+
+import org.slf4j.LoggerFactory
+import org.springframework.context.event.EventListener
+import org.springframework.scheduling.annotation.Async
+import org.springframework.stereotype.Component
+import org.springframework.transaction.event.TransactionPhase
+import org.springframework.transaction.event.TransactionalEventListener
+
+/**
+ * ```
+ * 기존에는 이벤트 리스너를 사용하기 위해서 ApplicationListener<T> 를 상속(또는 구현)해서 사용해야 했기에, 이벤트가 상속에 종속적이 되어 문제가 될 수 있었다.
+ *
+ * 하지만 스프링 4.2부터는 이벤트 리스너의 이벤트 처리를 어노테이션 기반으로 작성할 수 있도록 개선되었다.
+ *
+ * ApplicationListenerMethodAdapter 객체가 @EventListener 어노테이션을 찾아서 실행시켜준다.
+ *
+ * 빈 단위로 정의된 리스너(ApplicationListener<T> 를 상속하고 Component 로 등록된)에 대해서는 구현체로 SimpleApplicationEventMulticaster 를 사용한다. SimpleApplicationEventMulticaster 는 빈 단위로 정의된 작업을 실행시켜준다.
+ *
+ * 리스너는 메소드 단위로도 정의할 수 있다. 메소드에 @EventListener 어노테이션을 붙이면 이때는 구현체로 ApplicationListenerMethodAdapter 를 사용한다(구현체가 변경된다).
+ * ```
+ *
+ * @see AbstractApplicationContext
+ * @see ApplicationListenerMethodAdapter
+ * @see SimpleApplicationEventMulticaster
+ * @see ApplicationListenerMethodAdapter
+ * @see EventListener(org.springframework.context.event)
+ */
+
+@Component
+class AdminAnnotationEventListener {
+    private val log = LoggerFactory.getLogger(this::class.java)
+
+    @EventListener
+    fun onApplicationEvent(event: AdminAnnotationEvent) {
+        log.info("어드민 서비스 : {}님이 가입했습니다.", event.username)
+    }
+}
+
+@Component
+class CouponAnnotationEventListener {
+    private val log = LoggerFactory.getLogger(this::class.java)
+
+    @EventListener
+    fun onApplicationEvent(event: CouponAnnotationEvent) {
+        log.info("쿠폰 등록 완료 : {}", event.email)
+    }
+}
+
+@Component
+class SenderAnnotationEventListener {
+    private val log = LoggerFactory.getLogger(this::class.java)
+
+    @EventListener
+    fun handleEmail(event: SenderAnnotationEvent) {
+        log.info("환영 이메일 발송 성공 : {}", event.email)
+    }
+
+    @EventListener
+    fun handleSMS(event: SenderAnnotationEvent) {
+        log.info("환영 SMS 발송 성공 : {}", event.phoneNumber)
+    }
+}
+
+/**
+ * 트랜잭션 단위를 이벤트에서 관리(제어)하기 위해서 @TransactionalEventListener 를 사용할 수 있다.
+ *
+ * 기본 설정은 TransactionPhase.AFTER_COMMIT 이다. 이 외에도 여러 상태가 있으니 참고하여 설계하는데 사용하도록 하자.
+ *
+ * @see TransactionalEventListener
+ */
+
+@Component
+class AdminTransactionalEventListener {
+    private val log = LoggerFactory.getLogger(this::class.java)
+
+    @EventListener
+    fun onApplicationEvent(event: AdminTransactionalEvent) {
+        throw RuntimeException()
+//        log.info("어드민 서비스 : {}님이 가입했습니다.", event.username)
+    }
+}
+
+@Component
+class CouponTransactionalEventListener {
+    private val log = LoggerFactory.getLogger(this::class.java)
+
+    /**
+     * 아래의 @TransactionalEventListener 로 인해
+     *
+     * 트랜잭션 커밋이 정상적으로 성공한 이후에 이벤트가 실행(처리)된다.
+     */
+    @TransactionalEventListener(phase = TransactionPhase.AFTER_COMMIT)
+    fun onApplicationEvent(event: CouponTransactionalEvent) {
+        log.info("쿠폰 등록 완료 : {}", event.email)
+    }
+}
+
+@Component
+class SenderTransactionalEventListener {
+    private val log = LoggerFactory.getLogger(this::class.java)
+
+    @EventListener
+    fun handleEmail(event: SenderTransactionalEvent) {
+        log.info("환영 이메일 발송 성공 : {}", event.email)
+    }
+
+    @EventListener
+    fun handleSMS(event: SenderTransactionalEvent) {
+        log.info("환영 SMS 발송 성공 : {}", event.phoneNumber)
+    }
+}
+
+@Component
+class AdminAsyncEventListener {
+    private val log = LoggerFactory.getLogger(this::class.java)
+
+    @EventListener
+    fun onApplicationEvent(event: AdminAsyncEvent) {
+        log.info("어드민 서비스 : {}님이 가입했습니다.", event.username)
+    }
+}
+
+@Component
+class CouponAsyncEventListener {
+    private val log = LoggerFactory.getLogger(this::class.java)
+
+    @EventListener
+    fun onApplicationEvent(event: CouponAsyncEvent) {
+        log.info("쿠폰 등록 완료 : {}", event.email)
+    }
+}
+
+@Component
+class SenderAsyncEventListener {
+    private val log = LoggerFactory.getLogger(this::class.java)
+
+    /**
+     * 비동기로 설정하기 위해 @Async 어노테이션을 붙였다.
+     *
+     * 비동기로 설정했기 때문에 다른 쓰레드에서 이벤트가 실행된다.
+     *
+     * 그에 따라 예외가 발생해도 나머지 로직(회원 저장, 이벤트)은 제대로 처리된다(다른 쓰레드에서 예외가 발생한 것이기 때문에).
+     *
+     */
+    @Async
+    @EventListener
+    fun handleEmail(event: SenderAsyncEvent) {
+        throw RuntimeException()
+//        log.info("환영 이메일 발송 성공 : {}", event.email)
+    }
+
+    /**
+     * 비동기로 설정하기 위해 @Async 어노테이션을 붙였다.
+     *
+     * 비동기로 설정했기 때문에 다른 쓰레드에서 이벤트가 실행된다.
+     */
+    @Async
+    @EventListener
+    fun handleSMS(event: SenderAsyncEvent) {
+        log.info("환영 SMS 발송 성공 : {}", event.phoneNumber)
+    }
+}
+
--- a/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/domain/event/BaseOnAnnotationEvents.kt
+++ b/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/domain/event/BaseOnAnnotationEvents.kt
@@ -0,0 +1,27 @@
+package com.banjjoknim.playground.domain.event
+
+/**
+ * 어노테이션을 사용한 이벤트
+ *
+ * 어노테이션을 사용하면 상속을 받지 않아도 되기 때문에 스프링에 대한 의존성이 제거된 순수한 자바 객체를 이벤트 객체로 사용할 수 있다.
+ *
+ * @see EventListener
+ */
+
+class AdminAnnotationEvent(val username: String)
+
+class CouponAnnotationEvent(val email: String)
+
+class SenderAnnotationEvent(val email: String, val phoneNumber: String)
+
+class AdminTransactionalEvent(val username: String)
+
+class CouponTransactionalEvent(val email: String)
+
+class SenderTransactionalEvent(val email: String, val phoneNumber: String)
+
+class AdminAsyncEvent(val username: String)
+
+class CouponAsyncEvent(val email: String)
+
+class SenderAsyncEvent(val email: String, val phoneNumber: String)
--- a/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/domain/event/BaseOnInheritanceEventListeners.kt
+++ b/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/domain/event/BaseOnInheritanceEventListeners.kt
@@ -0,0 +1,41 @@
+package com.banjjoknim.playground.domain.event
+
+import org.slf4j.LoggerFactory
+import org.springframework.context.ApplicationListener
+import org.springframework.stereotype.Component
+
+/**
+ * 상속 기반 이벤트 리스너
+ *
+ * 스프링의 컨텍스트를 사용하기 때문에 빈으로 등록해줘야 사용할 수 있다
+ *
+ * @see ApplicationListener
+ */
+
+@Component
+class AdminInheritanceEventListener : ApplicationListener<AdminInheritanceEvent> {
+    private val log = LoggerFactory.getLogger(this::class.java)
+
+    override fun onApplicationEvent(event: AdminInheritanceEvent) {
+        log.info("어드민 서비스 : {}님이 가입했습니다.", event.username)
+    }
+}
+
+@Component
+class CouponInheritanceEventListener : ApplicationListener<CouponInheritanceEvent> {
+    private val log = LoggerFactory.getLogger(this::class.java)
+
+    override fun onApplicationEvent(event: CouponInheritanceEvent) {
+        log.info("쿠폰 등록 완료 : {}", event.email)
+    }
+}
+
+@Component
+class SenderInheritanceEventListener : ApplicationListener<SenderInheritanceEvent> {
+    private val log = LoggerFactory.getLogger(this::class.java)
+
+    override fun onApplicationEvent(event: SenderInheritanceEvent) {
+        log.info("환영 이메일 발송 성공 : {}", event.email)
+        log.info("환영 SMS 발송 성공 : {}", event.phoneNumber)
+    }
+}
--- a/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/domain/event/BaseOnInheritanceEvents.kt
+++ b/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/domain/event/BaseOnInheritanceEvents.kt
@@ -0,0 +1,17 @@
+package com.banjjoknim.playground.domain.event
+
+import org.springframework.context.ApplicationEvent
+
+/**
+ * 상속 기반 이벤트
+ *
+ * ApplicationEvent 를 상속받아서 사용한다.
+ *
+ * @see ApplicationEvent
+ */
+
+class AdminInheritanceEvent(source: Any, val username: String) : ApplicationEvent(source)
+
+class CouponInheritanceEvent(source: Any, val email: String) : ApplicationEvent(source)
+
+class SenderInheritanceEvent(source: Any, val email: String, val phoneNumber: String) : ApplicationEvent(source)
--- a/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/domain/event/DomainEvent.kt
+++ b/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/domain/event/DomainEvent.kt
@@ -0,0 +1,47 @@
+package com.banjjoknim.playground.domain.event
+
+import org.hibernate.SessionFactory
+import org.hibernate.event.service.spi.EventListenerRegistry
+import org.hibernate.event.spi.EventType
+import org.hibernate.event.spi.PostInsertEvent
+import org.hibernate.event.spi.PostInsertEventListener
+import org.hibernate.internal.SessionFactoryImpl
+import org.hibernate.persister.entity.EntityPersister
+import org.springframework.stereotype.Component
+
+/**
+ * ```
+ * org.hibernate.event.spi.EventType 을 살펴보면, 다양한 이벤트 발행시점(상태)을 볼 수 있다.
+ *
+ * 다양한 이벤트 발행시점(상태)과 이벤트를 이용해서 비즈니스 로직을 처리할 수 있다.
+ *
+ * 이벤트를 심도있게, 더 잘 활용하고 싶다면 Hibernate Session Event (Hibernate Event Session) 를 공부하도록 하자.
+ *
+ * Hibernate Session 의 이벤트 인터셉트를 이용해서 다양하게 활용할 수 있다.
+ * ```
+ * @see EventType
+ */
+@Component
+class DomainEvent {
+
+    private lateinit var sessionFactory: SessionFactory
+
+    fun sample() {
+        val registry = (sessionFactory as SessionFactoryImpl).serviceRegistry.getService(EventListenerRegistry::class.java)
+        registry.getEventListenerGroup(EventType.POST_COMMIT_INSERT).appendListener(CustomEventListener())
+    }
+}
+
+/**
+ *
+ */
+@Component
+class CustomEventListener : PostInsertEventListener {
+    override fun requiresPostCommitHanding(persister: EntityPersister?): Boolean {
+        TODO("Not yet implemented")
+    }
+
+    override fun onPostInsert(event: PostInsertEvent?) {
+        TODO("Not yet implemented")
+    }
+}
--- a/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/domain/sender/SenderService.kt
+++ b/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/domain/sender/SenderService.kt
@@ -0,0 +1,17 @@
+package com.banjjoknim.playground.domain.sender
+
+import org.slf4j.LoggerFactory
+import org.springframework.stereotype.Service
+
+@Service
+class SenderService {
+    private val log = LoggerFactory.getLogger(this::class.java)
+
+    fun sendEmail(email: String) {
+        log.info("환영 이메일 발송 성공 : {}", email)
+    }
+
+    fun sendSMS(phoneNumber: String) {
+        log.info("환영 SMS 발송 성공 : {}", phoneNumber)
+    }
+}
--- a/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/domain/user/User.kt
+++ b/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/domain/user/User.kt
@@ -0,0 +1,111 @@
+package com.banjjoknim.playground.domain.user
+
+import com.banjjoknim.playground.domain.event.AdminAnnotationEvent
+import com.banjjoknim.playground.domain.event.AdminAsyncEvent
+import com.banjjoknim.playground.domain.event.AdminInheritanceEvent
+import com.banjjoknim.playground.domain.event.AdminTransactionalEvent
+import com.banjjoknim.playground.domain.event.CouponAnnotationEvent
+import com.banjjoknim.playground.domain.event.CouponAsyncEvent
+import com.banjjoknim.playground.domain.event.CouponInheritanceEvent
+import com.banjjoknim.playground.domain.event.CouponTransactionalEvent
+import com.banjjoknim.playground.domain.event.SenderAnnotationEvent
+import com.banjjoknim.playground.domain.event.SenderAsyncEvent
+import com.banjjoknim.playground.domain.event.SenderInheritanceEvent
+import com.banjjoknim.playground.domain.event.SenderTransactionalEvent
+import org.springframework.context.ApplicationEventPublisher
+import javax.persistence.Column
+import javax.persistence.Entity
+import javax.persistence.GeneratedValue
+import javax.persistence.GenerationType
+import javax.persistence.Id
+
+@Entity
+class User(
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    val id: Long? = 0L,
+
+    @Column(name = "name")
+    val name: String = "",
+
+    @Column(name = "email")
+    val email: String = "",
+
+    @Column(name = "phoneNumber")
+    val phoneNumber: String = ""
+) {
+    /**
+     * 상속 기반의 이벤트 사용
+     */
+    fun publishInheritanceEvent(eventPublisher: ApplicationEventPublisher) {
+        publishInheritanceAdminEvent(eventPublisher)
+        publishInheritanceCouponEvent(eventPublisher)
+        publishInheritanceSenderEvent(eventPublisher)
+    }
+
+    private fun publishInheritanceAdminEvent(eventPublisher: ApplicationEventPublisher) {
+        eventPublisher.publishEvent(AdminInheritanceEvent(this, name))
+    }
+
+    private fun publishInheritanceCouponEvent(eventPublisher: ApplicationEventPublisher) {
+        eventPublisher.publishEvent(CouponInheritanceEvent(this, email))
+    }
+
+    private fun publishInheritanceSenderEvent(eventPublisher: ApplicationEventPublisher) {
+        eventPublisher.publishEvent(SenderInheritanceEvent(this, email, phoneNumber))
+    }
+
+    fun publishAnnotationEvent(eventPublisher: ApplicationEventPublisher) {
+        publishAnnotationAdminEvent(eventPublisher)
+        publishAnnotationCouponEvent(eventPublisher)
+        publishAnnotationSenderEvent(eventPublisher)
+    }
+
+    private fun publishAnnotationAdminEvent(eventPublisher: ApplicationEventPublisher) {
+        eventPublisher.publishEvent(AdminAnnotationEvent(name))
+    }
+
+    private fun publishAnnotationCouponEvent(eventPublisher: ApplicationEventPublisher) {
+        eventPublisher.publishEvent(CouponAnnotationEvent(email))
+    }
+
+    private fun publishAnnotationSenderEvent(eventPublisher: ApplicationEventPublisher) {
+        eventPublisher.publishEvent(SenderAnnotationEvent(email, phoneNumber))
+    }
+
+    fun publishWithTransactionalEventListener(eventPublisher: ApplicationEventPublisher) {
+        publishWithTransactionalCouponEvent(eventPublisher)
+        publishWithTransactionalAdminEvent(eventPublisher)
+        publishWithTransactionalSenderEvent(eventPublisher)
+    }
+
+    private fun publishWithTransactionalAdminEvent(eventPublisher: ApplicationEventPublisher) {
+        eventPublisher.publishEvent(AdminTransactionalEvent(name))
+    }
+
+    private fun publishWithTransactionalCouponEvent(eventPublisher: ApplicationEventPublisher) {
+        eventPublisher.publishEvent(CouponTransactionalEvent(email))
+    }
+
+    private fun publishWithTransactionalSenderEvent(eventPublisher: ApplicationEventPublisher) {
+        eventPublisher.publishEvent(SenderTransactionalEvent(email, phoneNumber))
+    }
+
+    fun publishWithAsyncEventListener(eventPublisher: ApplicationEventPublisher) {
+        publishWithAsyncCouponEvent(eventPublisher)
+        publishWithAsyncAdminEvent(eventPublisher)
+        publishWithAsyncSenderEvent(eventPublisher)
+    }
+
+    private fun publishWithAsyncAdminEvent(eventPublisher: ApplicationEventPublisher) {
+        eventPublisher.publishEvent(AdminAsyncEvent(name))
+    }
+
+    private fun publishWithAsyncCouponEvent(eventPublisher: ApplicationEventPublisher) {
+        eventPublisher.publishEvent(CouponAsyncEvent(email))
+    }
+
+    private fun publishWithAsyncSenderEvent(eventPublisher: ApplicationEventPublisher) {
+        eventPublisher.publishEvent(SenderAsyncEvent(email, phoneNumber))
+    }
+}
--- a/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/domain/user/UserApi.kt
+++ b/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/domain/user/UserApi.kt
@@ -0,0 +1,69 @@
+package com.banjjoknim.playground.domain.user
+
+import org.springframework.http.ResponseEntity
+import org.springframework.web.bind.annotation.GetMapping
+import org.springframework.web.bind.annotation.PathVariable
+import org.springframework.web.bind.annotation.PostMapping
+import org.springframework.web.bind.annotation.RequestBody
+import org.springframework.web.bind.annotation.RequestMapping
+import org.springframework.web.bind.annotation.RestController
+import javax.validation.Valid
+
+@RequestMapping("/users")
+@RestController
+class UserApi(
+    private val userService: UserService,
+    private val userServiceBaseOnInheritanceEvent: UserServiceBaseOnInheritanceEvent,
+    private val userServiceBaseOnAnnotationEvent: UserServiceBaseOnAnnotationEvent
+) {
+    /**
+     * 의존성을 모두 갖고 서비스 내에서 서비스를 호출하는 방식
+     */
+    @PostMapping("")
+    fun createUser(@RequestBody @Valid request: CreateUserRequest): ResponseEntity<Unit> {
+        userService.createUser(request)
+        return ResponseEntity.ok().build()
+    }
+
+    /**
+     * 상속 기반의 이벤트 사용 방식
+     */
+    @PostMapping("/inheritance")
+    fun createUserWithInheritanceEvent(@RequestBody @Valid request: CreateUserRequest): ResponseEntity<Unit> {
+        userServiceBaseOnInheritanceEvent.createUser(request)
+        return ResponseEntity.ok().build()
+    }
+
+    /**
+     * 어노테이션 기반의 이벤트 사용 방식
+     */
+    @PostMapping("/annotation")
+    fun createUserWithAnnotationEvent(@RequestBody @Valid request: CreateUserRequest): ResponseEntity<Unit> {
+        userServiceBaseOnAnnotationEvent.createUser(request)
+        return ResponseEntity.ok().build()
+    }
+
+    /**
+     * 트랜잭션 이벤트 리스너 어노테이션을 이용한 이벤트 사용 방식
+     */
+    @PostMapping("/transactional")
+    fun createUserWithTransactionalEventListener(@RequestBody @Valid request: CreateUserRequest): ResponseEntity<Unit> {
+        userServiceBaseOnAnnotationEvent.createUserWithTransactionalEventListener(request)
+        return ResponseEntity.ok().build()
+    }
+
+    /**
+     * 비동기 이벤트 리스너를 이용한 이벤트 사용 방식
+     */
+    @PostMapping("/async")
+    fun createUserWithAsyncEventListener(@RequestBody @Valid request: CreateUserRequest): ResponseEntity<Unit> {
+        userServiceBaseOnAnnotationEvent.createUserWithAsyncEventListener(request)
+        return ResponseEntity.ok().build()
+    }
+
+    @GetMapping("/{userId}")
+    fun retrieveUser(@PathVariable userId: Long): ResponseEntity<RetrieveUserResponse> {
+        val response = userService.retrieveUser(userId)
+        return ResponseEntity.ok(response)
+    }
+}
--- a/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/domain/user/UserDtos.kt
+++ b/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/domain/user/UserDtos.kt
@@ -0,0 +1,24 @@
+package com.banjjoknim.playground.domain.user
+
+import javax.validation.constraints.NotBlank
+
+data class CreateUserRequest(
+    @field:NotBlank(message = "이름을 입력해주세요")
+    val name: String = "",
+    @field:NotBlank(message = "이메일을 입력해주세요")
+    val email: String = "",
+    @field:NotBlank(message = "휴대폰 번호를 입력해주세요")
+    val phoneNumber: String = ""
+) {
+    fun toUser(): User {
+        return User(name = name, email = email, phoneNumber = phoneNumber)
+    }
+}
+
+data class RetrieveUserResponse(
+    val name: String,
+    val email: String,
+    val phoneNumber: String
+) {
+    constructor(user: User) : this(user.name, user.email, user.phoneNumber)
+}
--- a/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/domain/user/UserRepository.kt
+++ b/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/domain/user/UserRepository.kt
@@ -0,0 +1,6 @@
+package com.banjjoknim.playground.domain.user
+
+import org.springframework.data.jpa.repository.JpaRepository
+
+interface UserRepository : JpaRepository<User, Long> {
+}
--- a/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/domain/user/UserService.kt
+++ b/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/domain/user/UserService.kt
@@ -0,0 +1,35 @@
+package com.banjjoknim.playground.domain.user
+
+import com.banjjoknim.playground.domain.admin.AdminService
+import com.banjjoknim.playground.domain.admin.CouponService
+import com.banjjoknim.playground.domain.sender.SenderService
+import org.springframework.data.repository.findByIdOrNull
+import org.springframework.stereotype.Service
+import org.springframework.transaction.annotation.Transactional
+
+/**
+ * 의존성을 모두 갖고 서비스 내에서 서비스를 호출하는 방식
+ */
+@Transactional
+@Service
+class UserService(
+    private val userRepository: UserRepository,
+    private val adminService: AdminService,
+    private val senderService: SenderService,
+    private val couponService: CouponService
+) {
+    fun createUser(request: CreateUserRequest) {
+        val user = request.toUser()
+        userRepository.save(user)
+        adminService.alarm(user.name)
+        couponService.registerCoupon(user.email)
+        senderService.sendSMS(user.phoneNumber)
+        senderService.sendEmail(user.email)
+    }
+
+    fun retrieveUser(userId: Long): RetrieveUserResponse {
+        val user = userRepository.findByIdOrNull(userId)
+            ?: throw NoSuchElementException("회원이 존재하지 않습니다. [userId: $userId]")
+        return RetrieveUserResponse(user)
+    }
+}
--- a/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/domain/user/UserServiceBaseOnAnnotationEvent.kt
+++ b/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/domain/user/UserServiceBaseOnAnnotationEvent.kt
@@ -0,0 +1,30 @@
+package com.banjjoknim.playground.domain.user
+
+import org.springframework.context.ApplicationEventPublisher
+import org.springframework.stereotype.Service
+import org.springframework.transaction.annotation.Transactional
+
+@Transactional
+@Service
+class UserServiceBaseOnAnnotationEvent(
+    private val userRepository: UserRepository,
+    private val eventPublisher: ApplicationEventPublisher
+) {
+    fun createUser(request: CreateUserRequest) {
+        val user = request.toUser()
+        userRepository.save(user)
+        user.publishAnnotationEvent(eventPublisher)
+    }
+
+    fun createUserWithTransactionalEventListener(request: CreateUserRequest) {
+        val user = request.toUser()
+        userRepository.save(user)
+        user.publishWithTransactionalEventListener(eventPublisher)
+    }
+
+    fun createUserWithAsyncEventListener(request: CreateUserRequest) {
+        val user = request.toUser()
+        userRepository.save(user)
+        user.publishWithAsyncEventListener(eventPublisher)
+    }
+}
--- a/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/domain/user/UserServiceBaseOnInheritanceEvent.kt
+++ b/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/domain/user/UserServiceBaseOnInheritanceEvent.kt
@@ -0,0 +1,24 @@
+package com.banjjoknim.playground.domain.user
+
+import org.springframework.context.ApplicationEventPublisher
+import org.springframework.stereotype.Service
+import org.springframework.transaction.annotation.Transactional
+
+/**
+ * 상속 기반의 이벤트를 사용하는 서비스
+ *
+ * @see BaseOnInheritanceEventListeners
+ * @see BaseOnInheritanceEvents
+ */
+@Transactional
+@Service
+class UserServiceBaseOnInheritanceEvent(
+    private val userRepository: UserRepository,
+    private val eventPublisher: ApplicationEventPublisher
+) {
+    fun createUser(request: CreateUserRequest) {
+        val user = request.toUser()
+        userRepository.save(user)
+        user.publishInheritanceEvent(eventPublisher)
+    }
+}
--- a/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/user.http
+++ b/작성)/spring-event/src/main/kotlin/com/banjjoknim/playground/user.http
@@ -0,0 +1,52 @@
+### 고전적인 방식
+POST http://localhost:8080/users
+Content-Type: application/json
+
+{
+  "name": "banjjoknim",
+  "email": "banjjoknim@github.com",
+  "phoneNumber": "010-1234-5678"
+}
+
+### 상속 기반의 이벤트를 사용하는 방식
+POST http://localhost:8080/users/inheritance
+Content-Type: application/json
+
+{
+  "name": "banjjoknim",
+  "email": "banjjoknim@github.com",
+  "phoneNumber": "010-1234-5678"
+}
+
+### 어노테이션 기반의 이벤트를 사용하는 방식
+POST http://localhost:8080/users/annotation
+Content-Type: application/json
+
+{
+  "name": "banjjoknim",
+  "email": "banjjoknim@github.com",
+  "phoneNumber": "010-1234-5678"
+}
+
+### 트랜잭션 이벤트 리스너 어노테이션을 사용하는 방식
+POST http://localhost:8080/users/transactional
+Content-Type: application/json
+
+{
+  "name": "banjjoknim",
+  "email": "banjjoknim@github.com",
+  "phoneNumber": "010-1234-5678"
+}
+
+### 비동기 이벤트 리스너 어노테이션을 사용하는 방식
+POST http://localhost:8080/users/async
+Content-Type: application/json
+
+{
+  "name": "banjjoknim",
+  "email": "banjjoknim@github.com",
+  "phoneNumber": "010-1234-5678"
+}
+
+###
+GET http://localhost:8080/users/1
--- a/작성)/spring-event/src/main/resources/application.yml
+++ b/작성)/spring-event/src/main/resources/application.yml
@@ -0,0 +1,19 @@
+spring:
+
+  h2:
+    console:
+      enabled: true
+
+  datasource:
+    driver-class-name: org.h2.Driver
+    username: sa
+    password:
+    url: jdbc:h2:mem:testdb;MODE=MySQL;
+
+  jpa:
+    hibernate:
+      ddl-auto: create-drop
+    show-sql: true
+    properties:
+      hibernate:
+        format_sql: true
--- a/작성)/spring-event/src/test/kotlin/com/banjjoknim/playground/SpringEventApplicationTests.kt
+++ b/작성)/spring-event/src/test/kotlin/com/banjjoknim/playground/SpringEventApplicationTests.kt
@@ -0,0 +1,13 @@
+package com.banjjoknim.playground
+
+import org.junit.jupiter.api.Test
+import org.springframework.boot.test.context.SpringBootTest
+
+@SpringBootTest
+class SpringEventApplicationTests {
+
+	@Test
+	fun contextLoads() {
+	}
+
+}
--- a/작성)/spring-event/src/test/kotlin/com/banjjoknim/playground/domain/user/UserServiceBaseOnAnnotationEventTest.kt
+++ b/작성)/spring-event/src/test/kotlin/com/banjjoknim/playground/domain/user/UserServiceBaseOnAnnotationEventTest.kt
@@ -0,0 +1,60 @@
+package com.banjjoknim.playground.domain.user
+
+import com.banjjoknim.playground.domain.event.AdminAnnotationEvent
+import com.banjjoknim.playground.domain.event.CouponAnnotationEvent
+import com.banjjoknim.playground.domain.event.SenderAnnotationEvent
+import org.assertj.core.api.Assertions
+import org.junit.jupiter.api.BeforeEach
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.extension.ExtendWith
+import org.mockito.ArgumentCaptor
+import org.mockito.BDDMockito
+import org.mockito.Captor
+import org.mockito.Mock
+import org.mockito.junit.jupiter.MockitoExtension
+import org.springframework.context.ApplicationEventPublisher
+
+@ExtendWith(MockitoExtension::class)
+class UserServiceBaseOnAnnotationEventTest {
+
+    @Mock
+    private lateinit var userRepository: UserRepository
+
+    @Mock
+    private lateinit var eventPublisher: ApplicationEventPublisher
+
+    /**
+     * 발행된 이벤트를 캡쳐해서 데이터를 저장할 수 있다.
+     *
+     * 이때, 순수한 자바 객체를 이벤트 객체로 사용하므로 ArgumentCaptor 의 제네릭을 제네릭을 Any(Object)로 지정한다.
+     */
+    @Captor
+    private lateinit var eventPublisherCaptor: ArgumentCaptor<Any>
+
+    private lateinit var userServiceBaseOnAnnotationEvent: UserServiceBaseOnAnnotationEvent
+
+    @BeforeEach
+    fun setup() {
+        userServiceBaseOnAnnotationEvent = UserServiceBaseOnAnnotationEvent(userRepository, eventPublisher)
+    }
+
+    /**
+     * 아래와 같이 테스트는 작성할 수 있지만, 통합테스트를 돌려야 실제로 이벤트가 발행되고 이벤트 리스너가 이벤트를 처리하는 것을 확인할 수 있다는 한계점이 있다.
+     */
+    @Test
+    fun `회원 생성시 이벤트의 총 발행 횟수와 각각의 이벤트의 타입을 검사한다`() {
+        BDDMockito.given(userRepository.save(BDDMockito.any()))
+            .willReturn(User(name = "banjjoknim", email = "banjjoknim@github.com", phoneNumber = "010-1234-5678"))
+        val request =
+            CreateUserRequest(name = "banjjoknim", email = "banjjoknim@github.com", phoneNumber = "010-1234-5678")
+
+        userServiceBaseOnAnnotationEvent.createUser(request)
+
+        BDDMockito.then(eventPublisher).should(BDDMockito.times(3)).publishEvent(eventPublisherCaptor.capture())
+        // 캡쳐한 이벤트는 순차적으로 저장되므로 아래와 같이 검증할 수도 있다.
+        val events = eventPublisherCaptor.allValues
+        Assertions.assertThat(events[0]).isInstanceOf(AdminAnnotationEvent::class.java)
+        Assertions.assertThat(events[1]).isInstanceOf(CouponAnnotationEvent::class.java)
+        Assertions.assertThat(events[2]).isInstanceOf(SenderAnnotationEvent::class.java)
+    }
+}
--- a/작성)/spring-event/src/test/kotlin/com/banjjoknim/playground/domain/user/UserServiceBaseOnInheritanceEventTest.kt
+++ b/작성)/spring-event/src/test/kotlin/com/banjjoknim/playground/domain/user/UserServiceBaseOnInheritanceEventTest.kt
@@ -0,0 +1,64 @@
+package com.banjjoknim.playground.domain.user
+
+import com.banjjoknim.playground.domain.event.AdminInheritanceEvent
+import com.banjjoknim.playground.domain.event.CouponInheritanceEvent
+import com.banjjoknim.playground.domain.event.SenderInheritanceEvent
+import org.assertj.core.api.Assertions.assertThat
+import org.junit.jupiter.api.BeforeEach
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.extension.ExtendWith
+import org.mockito.ArgumentCaptor
+import org.mockito.BDDMockito.any
+import org.mockito.BDDMockito.given
+import org.mockito.BDDMockito.then
+import org.mockito.BDDMockito.times
+import org.mockito.Captor
+import org.mockito.Mock
+import org.mockito.junit.jupiter.MockitoExtension
+import org.springframework.context.ApplicationEvent
+import org.springframework.context.ApplicationEventPublisher
+
+@ExtendWith(MockitoExtension::class)
+class UserServiceBaseOnInheritanceEventTest {
+
+    @Mock
+    private lateinit var userRepository: UserRepository
+
+    @Mock
+    private lateinit var eventPublisher: ApplicationEventPublisher
+
+    /**
+     * 발행된 이벤트를 캡쳐해서 데이터를 저장할 수 있다.
+     *
+     * 이때, ApplicationEvent 를 상속받은 객체를 이벤트 객체로 사용하므로 ArgumentCaptor 의 제네릭을 ApplicationEvent 로 지정한다.
+     */
+    @Captor
+    private lateinit var eventPublisherCaptor: ArgumentCaptor<ApplicationEvent>
+
+    private lateinit var userServiceBaseOnInheritanceEvent: UserServiceBaseOnInheritanceEvent
+
+    @BeforeEach
+    fun setup() {
+        userServiceBaseOnInheritanceEvent = UserServiceBaseOnInheritanceEvent(userRepository, eventPublisher)
+    }
+
+    /**
+     * 아래와 같이 테스트는 작성할 수 있지만, 통합테스트를 돌려야 실제로 이벤트가 발행되고 이벤트 리스너가 이벤트를 처리하는 것을 확인할 수 있다는 한계점이 있다.
+     */
+    @Test
+    fun `회원 생성시 이벤트의 총 발행 횟수와 각각의 이벤트의 타입을 검사한다`() {
+        given(userRepository.save(any()))
+            .willReturn(User(name = "banjjoknim", email = "banjjoknim@github.com", phoneNumber = "010-1234-5678"))
+        val request =
+            CreateUserRequest(name = "banjjoknim", email = "banjjoknim@github.com", phoneNumber = "010-1234-5678")
+
+        userServiceBaseOnInheritanceEvent.createUser(request)
+
+        then(eventPublisher).should(times(3)).publishEvent(eventPublisherCaptor.capture())
+        // 캡쳐한 이벤트는 순차적으로 저장되므로 아래와 같이 검증할 수도 있다.
+        val events = eventPublisherCaptor.allValues
+        assertThat(events[0]).isInstanceOf(AdminInheritanceEvent::class.java)
+        assertThat(events[1]).isInstanceOf(CouponInheritanceEvent::class.java)
+        assertThat(events[2]).isInstanceOf(SenderInheritanceEvent::class.java)
+    }
+}