feat : AOP timetrac function add

src/main/java/hello/hellospring/SpringConfig.java

@@ -19,6 +19,11 @@ public SpringConfig(MemberReository memberReository) {
 	public MemberService memberService() {
 		return new MemberService(memberReository);
 	}
+
+	// @Bean // 이거 대신 Component 써도 됨
+	// public TimeTraceAop timeTraceAop() {
+	// 	return new TimeTraceAop();
+	// }
 	// @Bean
 	// public MemberReository memberRepository() {
 	// 	// return new MemoryMemberRepository();

src/main/java/hello/hellospring/aop/TimeTraceAop.java

@@ -1,4 +1,26 @@
 package hello.hellospring.aop;
 
+import org.aspectj.lang.ProceedingJoinPoint;
+import org.aspectj.lang.annotation.Around;
+import org.aspectj.lang.annotation.Aspect;
+import org.springframework.stereotype.Component;
+
+@Component // config에 넣어서 쓰기도 함
+@Aspect
 public class TimeTraceAop {
+
+	@Around("execution(* hello.hellospring..*(..))") // 다적용
+	public Object execute(ProceedingJoinPoint joinPoint) throws Throwable {
+		long start = System.currentTimeMillis();
+		System.out.println("START : " + joinPoint.toString());
+
+		try {
+			return joinPoint.proceed();
+		} finally {
+			long finish = System.currentTimeMillis();
+			long timeMs = finish - start;
+
+			System.out.println("END : " + joinPoint.toString() + " " + timeMs + "ms");
+		}
+	}
 }