Learning-Now · dbswl067 · Mar 24, 2021 · Apr 1, 2021 · Apr 1, 2021 · Apr 1, 2021
diff --git a/.idea/2021-Java-Study.iml b/.idea/2021-Java-Study.iml
diff --git a/.idea/misc.xml b/.idea/misc.xml
diff --git a/.idea/modules.xml b/.idea/modules.xml
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
diff --git a/.idea/workspace.xml b/.idea/workspace.xml
diff --git a/CQRS.md b/CQRS.md
@@ -0,0 +1,25 @@
+# 자바 기초
+## CQRS
+> CQRS는 Command and Query Responsibility Segregation(명령과 조회의 책임 분리)을 나타낸다. 이름처럼 시스템에서 명령을 처리하는 책임과 조회를 처리하는 책임을 분리하는 것이 CQRS의 핵심이다.
+
+<img src = "https://blog.nebrass.fr/wp-content/uploads/cqrs-simple-diagram-886x1024.png" height="500">
+
+- 명령(Command) : 시스템의 상태를 변경하는 작업
+	- ex) 주문 취소, 배송 완료
+- 쿼리(Query) : 시스템의 상태를 반환하는 작업
+	- ex) 주문 목록
+- 책임(Responsibility) : 구성 요소의 역할
+	- 구성 요소 : 클래스, 함수, 모듈/패키지, 웹서버/DB
+
+- 분리(Segregation) : 역할에 따라 구성 요소 나누기
+
+### 명령과 조회에 단일 모델을 사용한다면?
+🔍 명령과 쿼리가 다루는 데이터가 다르기 때문에 이도 저도 아닌 잡탕이 된다.
+- 코드 역할/책임 모호
+- 의미/가독성 등 나빠짐
+- 유지보수성이 떨어짐
+	- 명령과 쿼리는 코드 변경 빈도/사용자가 다르기 때문
+	- 기능마다 요구하는 성능이 다르기 때문
+
+
+
diff --git a/racingcar/.gradle/6.7/executionHistory/executionHistory.bin b/racingcar/.gradle/6.7/executionHistory/executionHistory.bin
diff --git a/racingcar/.gradle/6.7/executionHistory/executionHistory.lock b/racingcar/.gradle/6.7/executionHistory/executionHistory.lock
diff --git a/racingcar/.gradle/6.7/fileChanges/last-build.bin b/racingcar/.gradle/6.7/fileChanges/last-build.bin
diff --git a/racingcar/.gradle/6.7/fileHashes/fileHashes.bin b/racingcar/.gradle/6.7/fileHashes/fileHashes.bin
diff --git a/racingcar/.gradle/6.7/fileHashes/fileHashes.lock b/racingcar/.gradle/6.7/fileHashes/fileHashes.lock
diff --git a/racingcar/.gradle/6.7/gc.properties b/racingcar/.gradle/6.7/gc.properties
diff --git a/racingcar/.gradle/6.7/javaCompile/javaCompile.lock b/racingcar/.gradle/6.7/javaCompile/javaCompile.lock
diff --git a/racingcar/.gradle/6.7/javaCompile/taskHistory.bin b/racingcar/.gradle/6.7/javaCompile/taskHistory.bin
diff --git a/racingcar/.gradle/buildOutputCleanup/buildOutputCleanup.lock b/racingcar/.gradle/buildOutputCleanup/buildOutputCleanup.lock
diff --git a/racingcar/.gradle/buildOutputCleanup/cache.properties b/racingcar/.gradle/buildOutputCleanup/cache.properties
@@ -0,0 +1,2 @@
+#Mon Apr 12 17:58:13 KST 2021
+gradle.version=6.7
diff --git a/racingcar/.gradle/buildOutputCleanup/outputFiles.bin b/racingcar/.gradle/buildOutputCleanup/outputFiles.bin
diff --git a/racingcar/.gradle/checksums/checksums.lock b/racingcar/.gradle/checksums/checksums.lock
diff --git a/racingcar/.gradle/configuration-cache/gc.properties b/racingcar/.gradle/configuration-cache/gc.properties
diff --git a/racingcar/.gradle/vcs-1/gc.properties b/racingcar/.gradle/vcs-1/gc.properties
diff --git a/racingcar/.idea/.gitignore b/racingcar/.idea/.gitignore
diff --git a/racingcar/.idea/compiler.xml b/racingcar/.idea/compiler.xml
diff --git a/racingcar/.idea/gradle.xml b/racingcar/.idea/gradle.xml
diff --git a/racingcar/.idea/jarRepositories.xml b/racingcar/.idea/jarRepositories.xml
diff --git a/racingcar/.idea/misc.xml b/racingcar/.idea/misc.xml
diff --git a/racingcar/.idea/modules/racingcar.iml b/racingcar/.idea/modules/racingcar.iml
diff --git a/racingcar/build.gradle b/racingcar/build.gradle
@@ -0,0 +1,19 @@
+plugins {
+    id 'java'
+}
+
+group 'org.example'
+version '1.0-SNAPSHOT'
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.6.0'
+    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine'
+}
+
+test {
+    useJUnitPlatform()
+}
diff --git a/racingcar/build/classes/java/main/Application.class b/racingcar/build/classes/java/main/Application.class
diff --git a/racingcar/build/classes/java/main/racingcar/Car.class b/racingcar/build/classes/java/main/racingcar/Car.class
diff --git a/racingcar/build/classes/java/main/racingcar/Cars.class b/racingcar/build/classes/java/main/racingcar/Cars.class
diff --git a/racingcar/build/classes/java/main/racingcar/Game.class b/racingcar/build/classes/java/main/racingcar/Game.class
diff --git a/racingcar/build/classes/java/main/racingcar/Winner.class b/racingcar/build/classes/java/main/racingcar/Winner.class
diff --git a/racingcar/build/classes/java/main/utils/RandomUtils.class b/racingcar/build/classes/java/main/utils/RandomUtils.class
diff --git a/racingcar/build/classes/java/main/view/InputView.class b/racingcar/build/classes/java/main/view/InputView.class
diff --git a/racingcar/build/classes/java/main/view/ResultView.class b/racingcar/build/classes/java/main/view/ResultView.class
diff --git a/racingcar/build/tmp/compileJava/source-classes-mapping.txt b/racingcar/build/tmp/compileJava/source-classes-mapping.txt
@@ -0,0 +1,16 @@
+racingcar/Winner.java
+ racingcar.Winner
+racingcar/Game.java
+ racingcar.Game
+view/ResultView.java
+ view.ResultView
+Application.java
+ Application
+view/InputView.java
+ view.InputView
+racingcar/Car.java
+ racingcar.Car
+racingcar/Cars.java
+ racingcar.Cars
+utils/RandomUtils.java
+ utils.RandomUtils
diff --git a/racingcar/gradle/wrapper/gradle-wrapper.jar b/racingcar/gradle/wrapper/gradle-wrapper.jar
diff --git a/racingcar/gradle/wrapper/gradle-wrapper.properties b/racingcar/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.7-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,2 @@
		#Mon Apr 12 17:58:13 KST 2021
		gradle.version=6.7