public void TestInsertIntoFly()
{
var flyDb = DbUtilities.GetAndOpenConnection("FlyBooking");
flyDb.DropTableIfExist("FlyTable");
flyDb.CreateFlyTable();
flyDb.InsertIntoTable("FlyTable", $"('Kyiv', 'London', {"2020-10-10".ToDate()}, 50, 1)");
flyDb.InsertIntoTable("FlyTable", $"('Kyiv', 'London', {"2020-10-12".ToDate()}, 50, 1)");
flyDb.InsertIntoTable("FlyTable", $"('London', 'Kyiv', {"2020-10-15".ToDate()}, 50, 2)");
flyDb.Close();
}
public void TestInsertIntoHotel()
{
var hotelDb = DbUtilities.GetAndOpenConnection("HotelBooking");
hotelDb.DropTableIfExist("LondonCoolHotel");
hotelDb.CreateHotelTable();
hotelDb.InsertIntoTable("LondonCoolHotel",
$"(121, 150, {"2020-10-12".ToDate()}, {"2020-10-15".ToDate()}, 1)");
hotelDb.InsertIntoTable("LondonCoolHotel",
$"(122, 150, {"2020-10-10".ToDate()}, {"2020-10-15".ToDate()}, 0)");
hotelDb.Close();
}
public void TestAlmostFinalOk()
{
var flyDb = DbUtilities.GetAndOpenConnection("FlyBooking");
var hotelDb = DbUtilities.GetAndOpenConnection("HotelBooking");
var cardDb = DbUtilities.GetAndOpenConnection("Card");
var transHotel = hotelDb.BeginTransaction();
var transFly = flyDb.BeginTransaction();
var transCard = cardDb.BeginTransaction();
try
{
var flyCondition1 = $"fromcity = 'Kyiv' AND tocity = 'London' AND dateticket = {"2020-10-12".ToDate()}";
var hotelCondition = $"roomfrom = {"2020-10-12".ToDate()} AND roomto = {"2020-10-15".ToDate()}";
var flyCondition2 = $"fromcity = 'London' AND tocity = 'Kyiv' AND dateticket = {"2020-10-15".ToDate()}";
var priceFly1 = flyDb.SelectFromTable <int>("FlyTable", flyCondition1, "price");
flyDb.UpdateTable("FlyTable", "availabillity".Minus(), $"{flyCondition1} AND price = {priceFly1}");
var priceHotel = hotelDb.SelectFromTable <int>("LondonCoolHotel", hotelCondition, "roomprice");
hotelDb.UpdateTable("LondonCoolHotel", "availabillity".Minus(), $"{hotelCondition} AND roomprice = {priceHotel}");
var priceFly2 = flyDb.SelectFromTable <int>("FlyTable", flyCondition2, "price");
flyDb.UpdateTable("FlyTable", "availabillity".Minus(), $"{flyCondition2} AND price = {priceFly2}");
cardDb.UpdateTable("Account", "amount".Minus(priceFly1 + priceFly2 + priceHotel), $"bank = 'mybank'");
flyDb.PrepareTransaction(FlyTransactionName);
hotelDb.PrepareTransaction(HotelTransactionName);
cardDb.PrepareTransaction(CardTransactionName);
flyDb.CommitPrepared(FlyTransactionName);
hotelDb.CommitPrepared(HotelTransactionName);
cardDb.CommitPrepared(CardTransactionName);
}
catch (Exception ex)
{
transHotel.Rollback();
transFly.Rollback();
transCard.Rollback();
Console.WriteLine($"\nTransaction Failed: \n{ex.Message}");
}
if (flyDb.SelectAllFromTable <string>("pg_prepared_xacts", "gid") != null)
{
throw new Exception("Prepared Transaction Table not empty");
}
flyDb.Close();
hotelDb.Close();
cardDb.Close();
Console.WriteLine("\nTransaction Successful");
}
