Implement Service Method

In this lesson, we'll implement the get event service layer functionality.

Add Method to the Repository

Let's add a new method to our EventRepository interface:

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

    Optional<Event> findByIdAndOrganizerId(UUID id, UUID organizerId);
}

This repository method combines two search criteria:

The event's id
The organizerId to ensure users can only access their own events

Update the Service Layer

Next, let's add the corresponding method to our EventService interface:

public interface EventService {
    // Existing methods...

    Optional<Event> getEventForOrganizer(UUID organizerId, UUID id);
}

Finally, let's implement the method in our EventServiceImpl class:

@Service
@RequiredArgsConstructor
public class EventServiceImpl implements EventService {
    private final EventRepository eventRepository;

    // Existing methods...

    @Override
    public Optional<Event> getEventForOrganizer(UUID organizerId, UUID id) {
        // Pass the parameters to the repository method
        return eventRepository.findByIdAndOrganizerId(id, organizerId);
    }
}

Summary

Added repository method to find events by ID and organizer ID
Created service interface method for retrieving events
Implemented service method to fetch event details using repository