Myujth

I am new to the Android architecture components and have been trying out room for data storage from my server. Problem is no data is being shown on the recycler view and I think the issue is with inserting the data to the DB since I am able to retrieve data from my API using Retrofit and logging data from the DB shows null. Any suggestion's highly appreciated!

The Restaurant Pojo for the api:
RestaurantsModel.java

Restaurant Entity:
Restaurant.java

Location Entity(This is @Embedded in Restaurant entity):
Location.java

All of them are using a similar DataTypeConverters just of its type/class:

MenuTypeConverter.java

RestaurantDao.java:

@Dao
public interface RestaurantDao 

@Insert(onConflict = OnConflictStrategy.REPLACE)
void saveAll(List<Restaurant> restaurants);

@Insert(onConflict = OnConflictStrategy.REPLACE)
void save(Restaurant restaurants);

@Update
void update(Restaurant restaurants);

@Delete
void delete(Restaurant restaurants);

@Query("SELECT * FROM Restaurant")
LiveData<List<Restaurant>> findAll();

@Query("SELECT COUNT(*) FROM Restaurant")
int totalRestaurants();

RestaurantsDatabase.java(I also tried adding to objects to the db which still didnt show up):

@Database(entities = Restaurant.class, version = 1)
public abstract class RestaurantsDatabase extends RoomDatabase 


private static RestaurantsDatabase INSTANCE;

private final static List<Restaurant> RESTAURANTS = Arrays.asList(
 new Restaurant("Winterlympics", "Norway's", "He finished","`1AM",
 "6AM","d", "of", 2, 2, 4,
 2, 2,4,4,null,"p",null,
 new Location("USA", "USA", "USA", "USA", "USA", "USA", "USA", "USA"),
 null,null,null,null,null),
 new Restaurant("Winterlympics", "NOway's", "04850568540","`1AM",
 "6AM","d", "of", 2, 2, 4,
 2, 2,4,4,null,"p",null,
 new Location("USA", "USA", "USA", "USA", "USA", "USA", "USA", "USA"),
 null,null,null,null,null)
);

public abstract RestaurantDao restaurantDao();

private static final Object sLock = new Object();

public static RestaurantsDatabase getInstance(Context context) 
 synchronized (sLock) 
 if (INSTANCE == null) 
 INSTANCE = Room.databaseBuilder(context.getApplicationContext(),
 RestaurantsDatabase.class, "Restaurants.db")
 .allowMainThreadQueries()
 .addCallback(new RoomDatabase.Callback() 
 @Override
 public void onCreate(@NonNull SupportSQLiteDatabase db) 
 super.onCreate(db);
 Executors.newSingleThreadExecutor().execute(
 () -> getInstance(context).restaurantDao().saveAll(RESTAURANTS));
 
 )
 .build();
 
 return INSTANCE;
 

RestaurantViewModel.java:

public class RestaurantViewModel extends AndroidViewModel 
private RestaurantDao restaurantDao;
private ExecutorService executorService;
private ApiInterface webService;

public RestaurantViewModel(@NonNull Application application) 
 super(application);
 restaurantDao = RestaurantsDatabase.getInstance(application).restaurantDao();
 executorService = Executors.newSingleThreadExecutor();
 webService = ApiClient.getApiClient().create(ApiInterface.class);


LiveData<List<Restaurant>> getAllRestaurants() 
 refreshUser();
 Log.d("TAG", "============ From DB: " + restaurantDao.findAll().getValue());
 return restaurantDao.findAll();


void saveRestaurant(Restaurant restaurant) 
 executorService.execute(() -> restaurantDao.save(restaurant));


void deleteRestaurant(Restaurant restaurant) 
 executorService.execute(() -> restaurantDao.delete(restaurant));


private void refreshUser() 
 executorService.execute(() -> 

 int numOfRestaurants = restaurantDao.totalRestaurants();
 // If user have to be updated
 if (numOfRestaurants < 30) 
 Call<RestaurantsModel> call = webService.getRestaurants("Bearer eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpc3MiOiJodHRwczpcL1wvb3Z0by5jb1wvYXBpXC9sb2dpbiIsImlhdCI6MTU0MjM2ODY4MiwiZXhwIjoxNTQyMzcyMjgyLCJuYmYiOjE1NDIzNjg2ODIsImp0aSI6Im1GSHM4WmNiUVN0TEdJRHMiLCJzdWIiOjEsInBydiI6IjIzYmQ1Yzg5NDlmNjAwYWRiMzllNzAxYzQwMDg3MmRiN2E1OTc2ZjcifQ.-w1bouh4ljb-kk5zsu1vfaOcIIpaHcCUps5y3KuY6bc");
 call.enqueue(new Callback<RestaurantsModel>() 
 @Override
 public void onResponse(@NonNull Call<RestaurantsModel> call, @NonNull Response<RestaurantsModel> response) 
 restaurantDao.saveAll(response.body().getData().getData());
 

 @Override
 public void onFailure(@NonNull Call<RestaurantsModel> call, @NonNull Throwable t) 
 Log.d("TAG", "@Request onFailure " + t.toString());
 
 );
 
 );

MainActivity:

public class MainActivity extends AppCompatActivity 
private RestaurantsAdapter restaurantsAdapter;
private RestaurantViewModel restaurantViewModel;

@Override
protected void onCreate(Bundle savedInstanceState) 
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);

 restaurantsAdapter = new RestaurantsAdapter(this);

 restaurantViewModel = ViewModelProviders.of(this).get(RestaurantViewModel.class);
 restaurantViewModel.getAllRestaurants().observe(this, restaurants -> restaurantsAdapter.setData(restaurants));

 RecyclerView recyclerView = findViewById(R.id.recyclerView);
 recyclerView.setLayoutManager(new LinearLayoutManager(this));
 recyclerView.setHasFixedSize(true);
 recyclerView.setItemAnimator(new DefaultItemAnimator());
 recyclerView.setAdapter(restaurantsAdapter);
 

Adapter:
RestaurantsAdapter

Any further info needed do let me know. Thank you for even reading my long post...