fix: 문의하기 응답속도 개선을 위한 이벤트 핸들러 비동기 처리 (#106)

pennyway-infra/src/main/java/kr/co/pennyway/infra/common/event/MailEventHandling.java

@@ -4,6 +4,7 @@
 import lombok.AllArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.context.event.EventListener;
+import org.springframework.scheduling.annotation.Async;
 import org.springframework.stereotype.Component;
 import org.springframework.transaction.event.TransactionalEventListener;
 
@@ -21,8 +22,9 @@ public class MailEventHandling {
      * @param event {@link MailEvent}
      */
     @TransactionalEventListener
+    @Async
     public void handleMailEvent(MailEvent event) {
-        log.info("handleMailEvent: {}", event);
+        log.info("문의 메일 전송 이벤트 발생: {}", event);
         googleMailSender.sendMail(event.email(), event.content(), event.category());
     }
 }

pennyway-infra/src/main/java/kr/co/pennyway/infra/config/MailConfig.java

@@ -5,10 +5,12 @@
 import org.springframework.context.annotation.Configuration;
 import org.springframework.mail.javamail.JavaMailSender;
 import org.springframework.mail.javamail.JavaMailSenderImpl;
+import org.springframework.scheduling.annotation.EnableAsync;
 
 import java.util.Properties;
 
 @Configuration
+@EnableAsync
 public class MailConfig {
     @Value("${app.mail.host}")
     private String host;
@@ -43,4 +45,4 @@ private Properties getMailProperties() {
 
         return properties;
     }
-}
+}