[Feat(이현주(주디)): 스프링 핵심 3주차 커밋]

hyeon-ju/스프링_핵심_원리/README.MD

@@ -1,3 +1,5 @@
 https://six-warlock-900.notion.site/2-1-189af929a9c84b4d835c5e59a87d0ca6?pvs=4 (1/3)
 <br/>
-https://six-warlock-900.notion.site/3-2-d347a708f08842ff836b724a05beb161?pvs=4 (2/3)
+https://six-warlock-900.notion.site/3-2-d347a708f08842ff836b724a05beb161?pvs=4 (2/3)
+<br/>
+https://six-warlock-900.notion.site/4-3-fc25a8fd405a4179a15d0c43883ac371?pvs=4 (3/3)

hyeon-ju/스프링_핵심_원리/core/build.gradle

@@ -7,6 +7,14 @@ plugins {
 group = 'hello'
 version = '0.0.1-SNAPSHOT'
 
+//lombok 설정 추가 시작
+configurations {
+	compileOnly {
+		extendsFrom annotationProcessor
+	}
+}
+//lombok 설정 추가 끝
+
 java {
 	sourceCompatibility = '17'
 }
@@ -17,6 +25,17 @@ repositories {
 
 dependencies {
 	implementation 'org.springframework.boot:spring-boot-starter'
+	//web 라이브러리 추가
+	implementation 'org.springframework.boot:spring-boot-starter-web'
+	implementation 'jakarta.inject:jakarta.inject-api:2.0.1'
+
+	//lombok 라이브러리 추가 시작
+	compileOnly 'org.projectlombok:lombok'
+	annotationProcessor 'org.projectlombok:lombok'
+	testCompileOnly 'org.projectlombok:lombok'
+	testAnnotationProcessor 'org.projectlombok:lombok'
+	//lombok 라이브러리 추가 끝
+
 	testImplementation('org.springframework.boot:spring-boot-starter-test') {
 		exclude group: 'org.junit.vintage', module: 'junit-vintage-engine'
 	}

hyeon-ju/스프링_핵심_원리/core/src/main/java/hello/core/AutoAppConfig.java

@@ -16,8 +16,9 @@
 ) //스프링 빈을 쫙 긁어서 자동으로 끌어 올려줌
 public class AutoAppConfig {
 
-    @Bean(name = "memoryMemberRepository")
+    /*@Bean(name = "memoryMemberRepository")
     MemberRepository memberRepository() {
         return new MemoryMemberRepository();
     }
+     */
 }

hyeon-ju/스프링_핵심_원리/core/src/main/java/hello/core/HelloLombok.java

@@ -0,0 +1,25 @@
+package hello.core;
+
+import lombok.Getter;
+import lombok.Setter;
+import lombok.ToString;
+
+import java.lang.annotation.Target;
+
+@Getter
+@Setter
+//롬복이 자동으로 변수보고 getter, setter 만들어 줌
+@ToString
+public class HelloLombok {
+
+    private String name;
+    private int age;
+
+    public static void main(String[] args) {
+        HelloLombok helloLombok = new HelloLombok();
+        helloLombok.setName("sdgssge");
+
+        String name = helloLombok.getName();
+        System.out.println("helloLombok = " + helloLombok);
+    }
+}

hyeon-ju/스프링_핵심_원리/core/src/main/java/hello/core/annotation/MainDiscountPolicy.java

@@ -0,0 +1,13 @@
+package hello.core.annotation;
+
+import org.springframework.beans.factory.annotation.Qualifier;
+
+import java.lang.annotation.*;
+
+@Target({ElementType.FIELD, ElementType.METHOD, ElementType.PARAMETER, ElementType.TYPE, ElementType.ANNOTATION_TYPE})
+@Retention(RetentionPolicy.RUNTIME)
+@Inherited
+@Documented
+@Qualifier("mainDiscountPolicy")
+public @interface MainDiscountPolicy {
+}

hyeon-ju/스프링_핵심_원리/core/src/main/java/hello/core/common/MyLogger.java

@@ -0,0 +1,36 @@
+package hello.core.common;
+
+import jakarta.annotation.PostConstruct;
+import jakarta.annotation.PreDestroy;
+import org.springframework.context.annotation.Scope;
+import org.springframework.context.annotation.ScopedProxyMode;
+import org.springframework.stereotype.Component;
+
+import java.util.UUID;
+
+@Component
+@Scope(value = "request", proxyMode = ScopedProxyMode.TARGET_CLASS)
+public class MyLogger {
+
+    private String uuid;
+    private String requestURL;
+
+    public void setRequestURL(String requestURL) {
+        this.requestURL = requestURL;
+    }
+
+    public void log(String message) {
+        System.out.println("[" + uuid + "]" + "[" + requestURL + "] " + message);
+    }
+
+    @PostConstruct
+    public void  init() {
+        uuid = UUID.randomUUID().toString(); //전 세계 하나뿐인 글로벌한 ID 생성
+        System.out.println("[" + uuid + "] request scope bean create: " + this);
+    }
+
+    @PreDestroy
+    public void close() {
+        System.out.println("[" + uuid + "] request scope bean close: " + this);
+    }
+}

hyeon-ju/스프링_핵심_원리/core/src/main/java/hello/core/discount/FixDiscountPolicy.java

@@ -2,7 +2,10 @@
 
 import hello.core.member.Grade;
 import hello.core.member.Member;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.stereotype.Component;
 
+@Component
 public class FixDiscountPolicy implements DiscountPolicy {
 
     private int discountFixAmount = 1000; //1000원 할인

hyeon-ju/스프링_핵심_원리/core/src/main/java/hello/core/discount/RateDiscountPolicy.java

@@ -1,10 +1,14 @@
 package hello.core.discount;
 
+import hello.core.annotation.MainDiscountPolicy;
 import hello.core.member.Grade;
 import hello.core.member.Member;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.context.annotation.Primary;
 import org.springframework.stereotype.Component;
 
 @Component
+@MainDiscountPolicy
 public class RateDiscountPolicy implements  DiscountPolicy {
 
     private int discountPercent = 10;

hyeon-ju/스프링_핵심_원리/core/src/main/java/hello/core/order/OrderServiceImpl.java

@@ -1,24 +1,29 @@
 package hello.core.order;
 
+import hello.core.annotation.MainDiscountPolicy;
 import hello.core.discount.DiscountPolicy;
 import hello.core.discount.FixDiscountPolicy;
 import hello.core.discount.RateDiscountPolicy;
 import hello.core.member.Member;
 import hello.core.member.MemberRepository;
 import hello.core.member.MemoryMemberRepository;
+import lombok.RequiredArgsConstructor;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
 import org.springframework.stereotype.Component;
 
 @Component
+//@RequiredArgsConstructor //final이 붙은 값을 가지고 생성자를 만들어 줌
 public class OrderServiceImpl implements OrderService{
     private final MemberRepository memberRepository;
-    private DiscountPolicy discountPolicy;
+    private final DiscountPolicy discountPolicy;
 
     @Autowired
-    public OrderServiceImpl(MemberRepository memberRepository, DiscountPolicy discountPolicy) {
+    public OrderServiceImpl(MemberRepository memberRepository, @MainDiscountPolicy DiscountPolicy discountPolicy) {
         this.memberRepository = memberRepository;
         this.discountPolicy = discountPolicy;
     }
+
     @Override
     public Order createOrder(Long memberID, String itemName, int itemPrice) {
         Member member = memberRepository.findById(memberID);

hyeon-ju/스프링_핵심_원리/core/src/main/java/hello/core/web/LogDemoController.java

@@ -0,0 +1,30 @@
+package hello.core.web;
+
+import hello.core.common.MyLogger;
+import jakarta.servlet.http.HttpServletRequest;
+import lombok.RequiredArgsConstructor;
+import org.springframework.beans.factory.ObjectProvider;
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.ResponseBody;
+
+@Controller
+@RequiredArgsConstructor
+public class LogDemoController {
+
+    private final LogDemoService logDemoService;
+    private final MyLogger myLogger; //주입받는 것이 아닌 찾을 수 있는 DL 기능 객체가 주입 됨
+
+    @RequestMapping("log-demo")
+    @ResponseBody //문자를 그대로 온다고 보낼 수 있음
+    public String logDemo(HttpServletRequest request) throws InterruptedException { //자바에서 제공하는 표준 survlet에 의한 http-request 정보(고객 요청 정보)를 받을 수 있음
+        String requestURl = request.getRequestURL().toString();
+
+        System.out.println("myLogger = " + myLogger.getClass());
+        myLogger.setRequestURL(requestURl);
+
+        myLogger.log("controller test");
+        logDemoService.logic("testId");
+        return "OK";
+    }
+}

hyeon-ju/스프링_핵심_원리/core/src/main/java/hello/core/web/LogDemoService.java

@@ -0,0 +1,16 @@
+package hello.core.web;
+
+import hello.core.common.MyLogger;
+import lombok.RequiredArgsConstructor;
+import org.springframework.beans.factory.ObjectProvider;
+import org.springframework.stereotype.Service;
+
+@Service
+@RequiredArgsConstructor
+public class LogDemoService {
+
+    private final MyLogger myLogger;
+    public void logic(String id) {
+        myLogger.log("service id = " + id);
+    }
+}

hyeon-ju/스프링_핵심_원리/core/src/test/java/hello/core/autowired/AllBeanTest.java

@@ -0,0 +1,50 @@
+package hello.core.autowired;
+
+import hello.core.AutoAppConfig;
+import hello.core.discount.DiscountPolicy;
+import hello.core.member.Grade;
+import hello.core.member.Member;
+import org.assertj.core.api.Assertions;
+import org.junit.jupiter.api.Test;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+
+import java.util.List;
+import java.util.Map;
+
+import static org.assertj.core.api.Assertions.*;
+
+public class AllBeanTest {
+
+    @Test
+    void findAllBean() {
+        ApplicationContext ac = new AnnotationConfigApplicationContext(AutoAppConfig.class, DiscountService.class);
+        //DiscountService를 스프링 빈에 등록, 후에 AutoAppConfig 추가했으므로 AutoAppConfig도 다 등록, 이때 AutoAppConfig는 컴포넌트 스캔을 한다
+        DiscountService discountService = ac.getBean(DiscountService.class);
+        Member member = new Member(1L, "userA", Grade.Vip);
+        int discountPrice = discountService.discount(member, 10000, "fixDiscountPolicy");
+
+        assertThat(discountService).isInstanceOf(DiscountService.class);
+        assertThat(discountPrice).isEqualTo(1000);
+
+        int rateDiscountPrice = discountService.discount(member, 20000, "rateDiscountPolicy");
+        assertThat(rateDiscountPrice).isEqualTo(2000);
+    }
+
+    static class DiscountService { //기존 오더 서비스를 손대면 너무 복잡해지므로, 새로운 서비스를 만듬
+        private final Map<String, DiscountPolicy> policyMap;
+        private final List<DiscountPolicy> policies;
+
+        public DiscountService(Map<String, DiscountPolicy> policyMap, List<DiscountPolicy> policies) {
+            this.policyMap = policyMap;
+            this.policies = policies;
+            System.out.println("policyMap = " + policyMap);
+            System.out.println("policies = " + policies);
+        }
+
+        public int discount(Member member, int price, String discountCode) { //할인 코드를 빈 이름이랑 매칭시킨다
+            DiscountPolicy discountPolicy = policyMap.get(discountCode);
+            return discountPolicy.discount(member, price);
+        }
+    }
+}

hyeon-ju/스프링_핵심_원리/core/src/test/java/hello/core/autowired/AutowiredTest.java

@@ -0,0 +1,37 @@
+package hello.core.autowired;
+
+import hello.core.member.Member;
+import jakarta.annotation.Nullable;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+
+import java.util.Optional;
+
+public class AutowiredTest {
+    @Test
+    void AutowiredOption() {
+        ApplicationContext ac = new AnnotationConfigApplicationContext(TestBean.class);//TestBean이 스프링 빈으로 등록이 된다.
+        //ac.getBean(); //TestBean 받기
+    }
+
+    static class TestBean {
+
+        @Autowired(required = false) //false 안해주면 멤버가 빈으로 등록되는 것이 아니라서 오류가 난다
+        //required = false를 해두면 의존관계가 없을 시, 메소드 자체가 호출이 아예 안된다.
+        public void setNoBean1(Member noBean1) { //Member는 스프링 관련된 빈이 아님. 즉 스프링 컨테이너에서 관리 되는 것이 아닌 것을 아무거나 집어 넣은 것.
+            System.out.println("noBean1 = " + noBean1);
+        }
+
+        @Autowired
+        public void setNoBean2(@Nullable Member noBean2) { //호출은 되지만, null로 들어간다
+            System.out.println("noBean2 = " + noBean2);
+        }
+
+        @Autowired(required = false)
+        public void setNoBean3(Optional<Member> noBean3) {
+            System.out.println("noBean3 = " + noBean3);
+        }
+    }
+}

hyeon-ju/스프링_핵심_원리/core/src/test/java/hello/core/discount/RateDiscountPolicyTest.java

@@ -32,7 +32,7 @@ void vip_x() {
         //when
         int discount = discountPolicy.discount(member, 10000);
         //then
-        assertThat(discount).isEqualTo(1000);
+        //assertThat(discount).isEqualTo(1000);
 
         //캡쳐한 error 메시지 참고하자
     }

hyeon-ju/스프링_핵심_원리/core/src/test/java/hello/core/lifecycle/BeanLifeCycleTest.java

@@ -0,0 +1,29 @@
+package hello.core.lifecycle;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.stereotype.Component;
+
+public class BeanLifeCycleTest {
+
+    @Test
+    public void lifeCycleTest() {
+        ConfigurableApplicationContext ac = new AnnotationConfigApplicationContext(LifeCycleConfig.class);
+        NetworkClient client = ac.getBean(NetworkClient.class);
+        ac.close();
+    }
+
+    @Configuration
+    static class LifeCycleConfig {
+        @Bean
+        public NetworkClient networkClient() {
+            NetworkClient networkClient = new NetworkClient();
+            networkClient.setUrl("http://hello-spring.dev");
+            return networkClient;
+        }
+    }
+}