[Feat/#115] 행사·사물함·공지 즉시 알림 발송

core/common/src/main/java/kr/ac/kookmin/stream/common/event/EventApplicationCanceled.java

@@ -0,0 +1,4 @@
+package kr.ac.kookmin.stream.common.event;
+
+/** 회원이 행사 신청을 취소했다. 행사명은 알림 문구에 쓰려고 취소 시점의 값을 싣는다. */
+public record EventApplicationCanceled(Long memberId, Long eventId, String eventTitle) implements DomainEvent {}

core/common/src/main/java/kr/ac/kookmin/stream/common/event/EventApplied.java

@@ -0,0 +1,4 @@
+package kr.ac.kookmin.stream.common.event;
+
+/** 회원이 행사를 신청했다. 행사명은 알림 문구에 쓰려고 신청 시점의 값을 싣는다. */
+public record EventApplied(Long memberId, Long eventId, String eventTitle) implements DomainEvent {}

core/common/src/main/java/kr/ac/kookmin/stream/common/event/LockerAssigned.java

@@ -0,0 +1,4 @@
+package kr.ac.kookmin.stream.common.event;
+
+/** 회원이 사물함을 신청해 배정받았다. 신청과 배정이 동시에 일어난다. */
+public record LockerAssigned(Long memberId, Long lockerPeriodId) implements DomainEvent {}

core/common/src/main/java/kr/ac/kookmin/stream/common/event/NoticeCreated.java

@@ -0,0 +1,4 @@
+package kr.ac.kookmin.stream.common.event;
+
+/** 운영진이 새 공지를 등록했다. 공지는 저장하는 즉시 공개된다. */
+public record NoticeCreated(Long noticeId) implements DomainEvent {}

core/domain/event/src/main/java/kr/ac/kookmin/stream/event/domain/event/service/impl/EventApplicationServiceImpl.java

@@ -7,6 +7,9 @@
 import java.util.stream.Collectors;
 import kr.ac.kookmin.stream.common.BusinessException;
 import kr.ac.kookmin.stream.common.CursorSliceResult;
+import kr.ac.kookmin.stream.common.OutboxWriter;
+import kr.ac.kookmin.stream.common.event.EventApplicationCanceled;
+import kr.ac.kookmin.stream.common.event.EventApplied;
 import kr.ac.kookmin.stream.event.domain.event.domain.Event;
 import kr.ac.kookmin.stream.event.domain.event.domain.EventApplication;
 import kr.ac.kookmin.stream.event.domain.event.domain.EventApplicationAnswer;
@@ -31,6 +34,7 @@ class EventApplicationServiceImpl implements EventApplicationService {
 
     private final EventRepository eventRepository;
     private final EventApplyAnswerValidator eventApplyAnswerValidator;
+    private final OutboxWriter outboxWriter;
 
     @Override
     @Transactional(readOnly = true)
@@ -55,6 +59,7 @@ public EventApplicationResult apply(Long eventId, Long memberId, EventApplyComma
             EventApplication.create(eventId, memberId, LocalDateTime.now())
         );
         eventRepository.saveAnswers(toAnswers(application.getId(), command));
+        outboxWriter.record(new EventApplied(memberId, eventId, event.getTitle()));
 
         return new EventApplicationResult(application.getId(), event);
     }
@@ -119,6 +124,7 @@ public void cancelApplication(Long applicationId, Long memberId) {
 
         application.cancel(now);
         eventRepository.saveApplication(application);
+        outboxWriter.record(new EventApplicationCanceled(memberId, event.getId(), event.getTitle()));
     }
 
     /** 남의 신청은 없는 것으로 보여야 하므로 조회 단계에서 회원 식별자로 함께 거른다. */

core/domain/event/src/main/java/kr/ac/kookmin/stream/event/domain/locker/service/impl/LockerApplicationServiceImpl.java

@@ -6,6 +6,8 @@
 import java.util.function.Function;
 import java.util.stream.Collectors;
 import kr.ac.kookmin.stream.common.BusinessException;
+import kr.ac.kookmin.stream.common.OutboxWriter;
+import kr.ac.kookmin.stream.common.event.LockerAssigned;
 import kr.ac.kookmin.stream.event.domain.locker.domain.Locker;
 import kr.ac.kookmin.stream.event.domain.locker.domain.LockerApplication;
 import kr.ac.kookmin.stream.event.domain.locker.domain.LockerApplicationResult;
@@ -25,6 +27,7 @@ class LockerApplicationServiceImpl implements LockerApplicationService {
 
     private final LockerRepository lockerRepository;
     private final LockerApplicationRepository lockerApplicationRepository;
+    private final OutboxWriter outboxWriter;
 
     @Override
     @Transactional
@@ -35,6 +38,7 @@ public LockerApplicationResult apply(Long memberId, LockerApplyCommand command)
         LockerApplication application = lockerApplicationRepository.save(
             LockerApplication.create(period.getId(), memberId, locker.getId(), LocalDateTime.now())
         );
+        outboxWriter.record(new LockerAssigned(memberId, period.getId()));
         return new LockerApplicationResult(application, locker, period);
     }
 

core/domain/event/src/test/java/kr/ac/kookmin/stream/event/domain/locker/service/impl/LockerApplicationServiceImplTest.java

@@ -58,7 +58,8 @@ private static Locker locker(LockerStatus status) {
     }
 
     private static LockerApplicationServiceImpl service(FakeLockerRepository repository) {
-        return new LockerApplicationServiceImpl(repository, repository.applications);
+        // 아웃박스 기록은 이 테스트의 관심사가 아니라 아무것도 하지 않는다
+        return new LockerApplicationServiceImpl(repository, repository.applications, event -> {});
     }
 
     private static LockerApplyCommand command() {

core/domain/member/src/main/java/kr/ac/kookmin/stream/member/domain/notification/service/impl/NotificationEventListener.java

@@ -0,0 +1,46 @@
+package kr.ac.kookmin.stream.member.domain.notification.service.impl;
+
+import java.util.List;
+import kr.ac.kookmin.stream.common.event.EventApplicationCanceled;
+import kr.ac.kookmin.stream.common.event.EventApplied;
+import kr.ac.kookmin.stream.common.event.LockerAssigned;
+import kr.ac.kookmin.stream.common.event.NoticeCreated;
+import kr.ac.kookmin.stream.member.domain.notification.domain.NotificationType;
+import lombok.RequiredArgsConstructor;
+import org.springframework.context.event.EventListener;
+import org.springframework.stereotype.Component;
+
+/**
+ * 다른 도메인의 이벤트를 알림으로 바꾼다. 아웃박스 릴레이가 트랜잭션 밖에서 발행하므로 {@code @EventListener}로 받는다.
+ * 예외를 던지면 릴레이가 같은 이벤트를 다시 발행한다.
+ */
+@Component
+@RequiredArgsConstructor
+class NotificationEventListener {
+
+    private final NotificationDispatcher notificationDispatcher;
+
+    @EventListener
+    public void on(EventApplied event) {
+        notificationDispatcher.dispatch(
+            NotificationType.EVENT_APPLIED, List.of(event.eventTitle()), event.eventId(), List.of(event.memberId()));
+    }
+
+    @EventListener
+    public void on(EventApplicationCanceled event) {
+        notificationDispatcher.dispatch(
+            NotificationType.EVENT_APPLICATION_CANCELED, List.of(event.eventTitle()), event.eventId(), List.of(event.memberId()));
+    }
+
+    @EventListener
+    public void on(LockerAssigned event) {
+        notificationDispatcher.dispatch(
+            NotificationType.LOCKER_ASSIGNED, List.of(), event.lockerPeriodId(), List.of(event.memberId()));
+    }
+
+    // 공지는 활성 회원 전체에게 간다
+    @EventListener
+    public void on(NoticeCreated event) {
+        notificationDispatcher.dispatchToAll(NotificationType.NOTICE_CREATED, List.of(), event.noticeId(), List.of());
+    }
+}

core/domain/welfare/src/main/java/kr/ac/kookmin/stream/welfare/domain/notice/service/impl/NoticeServiceImpl.java

@@ -4,6 +4,8 @@
 import java.time.temporal.ChronoUnit;
 import kr.ac.kookmin.stream.common.BusinessException;
 import kr.ac.kookmin.stream.common.CursorSliceResult;
+import kr.ac.kookmin.stream.common.OutboxWriter;
+import kr.ac.kookmin.stream.common.event.NoticeCreated;
 import kr.ac.kookmin.stream.welfare.domain.notice.domain.Notice;
 import kr.ac.kookmin.stream.welfare.domain.notice.domain.NoticeCategory;
 import kr.ac.kookmin.stream.welfare.domain.notice.domain.NoticeCreateCommand;
@@ -21,6 +23,7 @@
 class NoticeServiceImpl implements NoticeService {
 
     private final NoticeRepository noticeRepository;
+    private final OutboxWriter outboxWriter;
 
     @Override
     @Transactional(readOnly = true)
@@ -39,9 +42,13 @@ public Notice getNotice(Long id) {
             .orElseThrow(() -> new BusinessException(NoticeErrorCode.NOTICE_NOT_FOUND));
     }
 
+    // 공지 저장과 알림 이벤트 기록이 함께 커밋되도록 트랜잭션을 건다
     @Override
+    @Transactional
     public Notice create(Long createdBy, NoticeCreateCommand command) {
-        return noticeRepository.save(Notice.create(createdBy, command));
+        Notice notice = noticeRepository.save(Notice.create(createdBy, command));
+        outboxWriter.record(new NoticeCreated(notice.getId()));
+        return notice;
     }
 
     @Override