List Published Events Service

In this lesson, we'll implement the list published events service layer.

Service Layer Implementation

Let's add the listPublishedEvents method to our EventService interface:

public interface EventService {
    // ... existing methods ...

    Page<Event> listPublishedEvents(Pageable pageable);
}

Next, we'll implement the method in our EventServiceImpl class:

@Override
public Page<Event> listPublishedEvents(Pageable pageable) {
    // Use the repository to find events with PUBLISHED status
    return eventRepository.findByStatus(EventStatusEnum.PUBLISHED, pageable);
}

Repository Layer Implementation

To support our service layer, we need to add a method to our EventRepository interface that can find events by their status:

@Repository
public interface EventRepository extends JpaRepository<Event, UUID> {
    // ... existing methods ...

    // Find events by their status (e.g., PUBLISHED)
    Page<Event> findByStatus(EventStatusEnum status, Pageable pageable);
}

The findByStatus method follows Spring Data JPA's method naming convention, which automatically generates the correct query based on the method name.

Summary

Added the findByStatus method to the EventRepository interface
Added the listPublishedEvents method to the EventService interface
Implemented the listPublishedEvents method in the EventServiceImpl class