add query count

src/main/java/ru/ip/example/controller/FilmController.java

@@ -13,8 +13,10 @@ import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.RestController;
 import ru.ip.example.domain.AddSeazonDto;
+import ru.ip.example.domain.CountStatisticDto;
 import ru.ip.example.domain.FilmRequestDto;
 import ru.ip.example.domain.FilmResponseDto;
+import ru.ip.example.domain.entity.CountStatistic;
 import ru.ip.example.service.FilmService;
 
 import java.util.List;
@@ -32,6 +34,12 @@ public class FilmController {
         return filmService.findFilmByTitle(title);
     }
 
+    @GetMapping("/films/count")
+    @Operation(description = "Статистика по кол-вам сущностей")
+    public CountStatisticDto count() {
+        return filmService.countStatistic();
+    }
+
     @GetMapping("/films")
     @Operation(description = "Возвращает список всех фильмов")
     public List<FilmResponseDto> getAll() {

src/main/java/ru/ip/example/domain/CountStatisticDto.java

@@ -0,0 +1,15 @@
+package ru.ip.example.domain;
+
+import lombok.Data;
+
+@Data
+public class CountStatisticDto {
+
+    private int filmCount;
+
+    private int seazonCount;
+
+    private int seriesCount;
+
+    private int subscribeCount;
+}

src/main/java/ru/ip/example/domain/entity/CountStatistic.java

@@ -0,0 +1,13 @@
+package ru.ip.example.domain.entity;
+
+public interface CountStatistic {
+
+    int getFilmCount();
+
+    int getSeazonCount();
+
+    int getSeriesCount();
+
+    int getSubscribeCount();
+}
+

src/main/java/ru/ip/example/mapper/FilmMapper.java

@@ -2,9 +2,11 @@ package ru.ip.example.mapper;
 
 import org.mapstruct.Mapper;
 import org.mapstruct.Mapping;
+import ru.ip.example.domain.CountStatisticDto;
 import ru.ip.example.domain.FilmRequestDto;
 import ru.ip.example.domain.FilmResponseDto;
 import ru.ip.example.domain.SeazonResponseDto;
+import ru.ip.example.domain.entity.CountStatistic;
 import ru.ip.example.domain.entity.FilmEntity;
 import ru.ip.example.domain.entity.SeazonEntity;
 
@@ -20,4 +22,6 @@ public interface FilmMapper {
     List<SeazonResponseDto> toSeazonsList(List<SeazonEntity> seazonEntities);
 
     FilmEntity toEntity(FilmRequestDto dto);
+
+    CountStatisticDto toCountDto(CountStatistic stat);
 }

src/main/java/ru/ip/example/repository/FilmRepository.java

@@ -3,6 +3,7 @@ package ru.ip.example.repository;
 import org.springframework.data.jpa.repository.Query;
 import org.springframework.data.repository.CrudRepository;
 import org.springframework.data.repository.query.Param;
+import ru.ip.example.domain.entity.CountStatistic;
 import ru.ip.example.domain.entity.FilmEntity;
 
 import java.util.Optional;
@@ -11,4 +12,8 @@ public interface FilmRepository extends CrudRepository<FilmEntity, Integer> {
 
     @Query(value = "SELECT * FROM film f WHERE f.title = :title", nativeQuery = true)
     Optional<FilmEntity> findFilmByTitle(@Param("title") String title);
+
+    @Query(value = "SELECT (SELECT count(*) FROM FILM) as filmCount, (SELECT count(*) FROM SEAZON) as seazonCount, " +
+            "(SELECT count(*) FROM SERIES) as seriesCount,  (SELECT count(*) FROM SUBSCRIBE) as subscribeCount", nativeQuery = true)
+    CountStatistic countTableStatisticCount();
 }

src/main/java/ru/ip/example/service/FilmService.java

@@ -1,13 +1,17 @@
 package ru.ip.example.service;
 
 import ru.ip.example.domain.AddSeazonDto;
+import ru.ip.example.domain.CountStatisticDto;
 import ru.ip.example.domain.FilmRequestDto;
 import ru.ip.example.domain.FilmResponseDto;
+import ru.ip.example.domain.entity.CountStatistic;
 
 import java.util.List;
 
 public interface FilmService {
 
+    CountStatisticDto countStatistic();
+
     FilmResponseDto findFilmByTitle(String title);
 
     FilmResponseDto saveFilm(FilmRequestDto dto);

src/main/java/ru/ip/example/service/impl/FilmServiceImpl.java

@@ -4,8 +4,10 @@ import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 import ru.ip.example.domain.AddSeazonDto;
+import ru.ip.example.domain.CountStatisticDto;
 import ru.ip.example.domain.FilmRequestDto;
 import ru.ip.example.domain.FilmResponseDto;
+import ru.ip.example.domain.entity.CountStatistic;
 import ru.ip.example.domain.entity.FilmEntity;
 import ru.ip.example.mapper.FilmMapper;
 import ru.ip.example.repository.FilmRepository;
@@ -26,6 +28,12 @@ public class FilmServiceImpl implements FilmService {
 
     private final SeazonRepository seazonRepository;
 
+    @Override
+    public CountStatisticDto countStatistic() {
+        CountStatistic countStatistic = filmRepository.countTableStatisticCount();
+        return filmMapper.toCountDto(countStatistic);
+    }
+
     @Transactional(readOnly = true)
     @Override
     public FilmResponseDto findFilmByTitle(String title) {