AOP : MemberSerivce.join()

MemberServiceJoin.java

public Long join(Member member) {

    long start = System.currentTimeMillis();

    try {
        // 핵심 관심 사항
        validateDuplicateMember(member);
        memberRepository.save(member);
        return member.getId();
    } finally {
        // 공통 관심 사항
        long finish = System.currentTimeMillis();
        long timeMs = finish - start;
        System.out.println("join = " + timeMs + "ms");
    }
}