QuoteRepository.java

class QuoteRepository {
  private QuoteAPI quoteAPI;
  private QuoteDAO quoteDAO;
  private Executor executor;

  QuoteRepository(){
    this.executor = Executors.newSingleThreadExecutor();
    MyQuoteDB db = Room.databaseBuilder(context,
    MyQuoteDB.class, "database-name").build();
    quoteDAO=db.quoteDAO();
  }

  // …
  LiveData<Quote> getQuote(String category, int count) {
    refreshQuote(category);
    return quoteDAO.getQuote();
  }

  private void refreshQuote(String category){
    HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
    interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
    OkHttpClient client = new OkHttpClient.Builder().addInterceptor(interceptor).build();

    Retrofit.Builder builder = new Retrofit.Builder()
      .baseUrl("https://andruxnet-random-famous-quotes.p.mashape.com/")
      .client(client)
      .addConverterFactory(GsonConverterFactory.create());

    Retrofit retrofit = builder.build();

    quoteAPI = retrofit.create(QuoteAPI.class);

    quoteAPI.getQuote(category, 1).enqueue(new Callback<Quote> () {
      @Override
      public void onResponse(Call<Quote> call, final Response<Quote> response) {
        //update the db once fresh data is available
        Executors.newSingleThreadExecutor().execute(new Runnable() {
          @Override
            public void run() {
            quoteDAO.save(response.body());
            }
          });
      }

      @Override
      public void onFailure(Call<Quote> call, Throwable t) {
        Log.v(Constants.TAG, t.getMessage());
      }
      });
    }
}