CODEWITHSUNDEEP
javaandroidandroid-roomandroid-workmanager
Ian Bell
Ian Bell

Reputation: 543

How can I access my Rooms database's Repository from a Worker class in Android?

I hava a Worker class in my application where I want to get the data from my Rooms database. Since I am using MVVM architecture, how can I get the data from the database using repository in my Worker class?

Code -

Worker class

public class SendNotification extends Worker {


    public SendNotification(@NonNull Context context, @NonNull WorkerParameters workerParams) {
        super(context, workerParams);
    }

    @RequiresApi(api = Build.VERSION_CODES.M)
    @NonNull
    @Override
    public Result doWork() {

        String flightnumber = getInputData().getString("flight");
        String date = getInputData().getString("date");
       

        sendNotification(flightnumber,date);

        return Result.success();

    }}

Repository

public class FlightRepository {

    private FlightDao flightDao;
    private LiveData<List<Flight>> allFlights;

    public FlightRepository(Application application) {
        FlightDatabase database = FlightDatabase.getInstance(application);
        flightDao = database.flightDao();
        allFlights = flightDao.getAllFlights();

    }

    public void insert(Flight flight) {
        new InsertFlightAsyncTask(flightDao).execute(flight);
    }

    public void update(Flight flight) {
        new UpdateFlightAsyncTask(flightDao).execute(flight);
    }

    public void delete(Flight flight) {
        new DeleteFlightAsyncTask(flightDao).execute(flight);
    }

    public void deleteAllFlights() {
        new DeleteAllFlightsAsyncTask(flightDao).execute();
    }

    public LiveData<List<Flight>> getAllFlights() {
        return allFlights;
    }

    public Flight getFlight(String flightNumber, String date){
        return flightDao.getFlight(flightNumber,date);
    }

    public boolean existsFlight(String flightNumber, String date){
        return flightDao.existsFlight(flightNumber, date);

}

Upvotes: 1

Views: 1673

Answers (1)

Darryl Bayliss
Darryl Bayliss

Reputation: 2712

You should be able to create an instance of FlightRepository inside the Worker:

public class SendNotification extends Worker {

  private FlightRepository flightRepo;


public SendNotification(@NonNull Context context, @NonNull WorkerParameters workerParams) {
    super(context, workerParams);
    this.flightRepo = new FlightRepository(context)
}

@RequiresApi(api = Build.VERSION_CODES.M)
@NonNull
@Override
public Result doWork() {

    String flightnumber = getInputData().getString("flight");
    String date = getInputData().getString("date");
   
    // Do what is needed with flightRepo

    sendNotification(flightnumber,date);

    return Result.success();

}}

Making some assumptions here. I'd refactor FlightDatabase to accept a Context, rather than Application. I'm not sure why the database would need access to Application

Upvotes: 3

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