//returns id of added element
public static int Add(PromiseMapElement elem)
{
mapMutex.WaitOne(-1);
map.TryAdd(nextID, elem);
mapMutex.ReleaseMutex();
nextID += 1;
return(nextID - 1);
}
public static PromiseMapElement AcquireElement(int id)
{
mapMutex.WaitOne(-1);
PromiseMapElement elem = map[id];
elem.Acquire(); //implement spinlock
mapMutex.ReleaseMutex();
return(elem);
}
static internal void Run(TcpClient client, string json)
{
try
{
Request r = JsonSerializer.Deserialize <Request>(json);
PromiseMapElement elem = new PromiseMapElement(client, r);
elem.ToggleState();
int id = Promisemap.Add(elem);
SQL_Socket.Execute(id);
}
catch (JsonException)
{
Console.WriteLine("ERROR: The Request is not a valid JSON");
}
}
internal static void Run(int id)
{
PromiseMapElement elem = Promisemap.AcquireElement(id);
string ip = elem.client.Client.RemoteEndPoint.ToString();
string json = JsonSerializer.Serialize(elem.GetResponse());
// Send back a response.
Lib.Write(elem.client, json, false);
Console.WriteLine($"({ip}) Sent: {json}");
// Disconnect client after sending the response
elem.client.Close();
Console.WriteLine($"({ip}) Client disconnected");
Promisemap.Remove(id);
}
static internal void Run(int id)
{
PromiseMapElement elem = Promisemap.AcquireElement(id);
try
{
Request rq = elem.request;
List <Car> cars = new List <Car>();
bool valid = true;
//yyyymmdd
string startDate = rq.start.Year.ToString() + rq.start.Month.ToString() + rq.start.Day.ToString();
string endDate = rq.end.Year.ToString() + rq.end.Month.ToString() + rq.end.Day.ToString();
dbMutex.WaitOne(-1);
if (!init)
{
init = true;
string source = $"..\\..\\..\\..\\Datenbank\\Datenbank.sql";
string destination = $"..\\..\\..\\..\\Datenbank\\Datenbank.db";
bool tmp = false;
if (!File.Exists(destination))
{
tmp = true;
}
db = new SqliteConnection("Data Source=" + destination);
db.Open();
if (tmp)
{
InitializeDatabase(source);
}
try
{
SqliteCommand cmd = db.CreateCommand();
cmd.CommandText =
@"Select VermietungID FROM Vermietung ORDER BY VermietungID DESC LIMIT 1";
SqliteDataReader r = cmd.ExecuteReader();
if (r.HasRows)
{
r.Read();
vermietungID = (uint)r.GetInt32(0) + 1;
}
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
else
{
db.Open();
}
SqliteCommand command = db.CreateCommand();
if (rq.carID == -1)
{
command.CommandText =
@"
SELECT *
FROM Autos
WHERE AutoID NOT IN(
SELECT AutoID
FROM Vermietung
WHERE(Anfang <= $endDate AND Anfang >= $startDate)
OR (Ende <= $endDate AND Ende >= $startDate)
)
";
command.Parameters.AddWithValue("$startDate", startDate);
command.Parameters.AddWithValue("$endDate", endDate);
}
else
{
try
{
SqliteCommand cmd = db.CreateCommand();
cmd.CommandText =
@"
SELECT AutoID
FROM Vermietung
WHERE(AutoID = $id
AND ((Anfang <= $endDate AND Anfang >= $startDate)
OR (Ende <= $endDate AND Ende >= $startDate))
)
";
cmd.Parameters.AddWithValue("$id", elem.request.carID);
cmd.Parameters.AddWithValue("$startDate", startDate);
cmd.Parameters.AddWithValue("$endDate", endDate);
SqliteDataReader r = cmd.ExecuteReader();
if (r.HasRows)
{
r.Read();
valid = false;
Console.WriteLine($"Booking Validity Check returned: {r.GetInt32(0)}");
r.Close();
}
}
catch (Exception e)
{
Console.WriteLine("Booking Validity Check returned:");
Console.WriteLine(e.Message);
}
if (valid)
{
command.CommandText =
@"INSERT INTO Vermietung (VermietungID, Anfang, Ende, AutoID)
VALUES($vermietungID, $startDate, $endDate, $id)
";
command.Parameters.AddWithValue("$vermietungID", vermietungID++);
command.Parameters.AddWithValue("$startDate", startDate);
command.Parameters.AddWithValue("$endDate", endDate);
command.Parameters.AddWithValue("$id", id);
}
}
if (valid)
{
SqliteDataReader reader = command.ExecuteReader();
IEnumerator readerEnumerator = reader.GetEnumerator();
while (readerEnumerator.MoveNext())
{
//AutoID int NOT NULL PRIMARY KEY, Modell char(50), Marke char(50),
//Kraftstoffart char(50), Leistung int, Typ char(50), Sitzplaetze int, Tueren int, Tagespreis int
int _AutoID = reader.GetInt32(0);
string _model = reader.GetString(1);
string _brand = reader.GetString(2);
string _fueltype = reader.GetString(3);
int _power = reader.GetInt32(4);
string _type = reader.GetString(5);
int _seats = reader.GetInt32(6);
int _doors = reader.GetInt32(7);
int _pricePerDay = reader.GetInt32(8);
cars.Add(new Car(_AutoID, _model, _brand, _fueltype, _power, _type, _seats, _doors, _pricePerDay));
}
}
dbMutex.ReleaseMutex();
db.Close();
if (valid)
{
elem.SetResponse(new Response("OK", cars));
}
else
{
elem.SetResponse(new Response("INVALID"));
}
elem.ToggleState();
}
catch (Exception e)
{
Console.WriteLine($"Exception occured: {e.Message}");
elem.SetResponse(new Response(e.Message));
}
Promisemap.ReleaseElement(elem);
//Forward to DeliveryHandler
DeliveryHandler.Handle(id);
}
public static void ReleaseElement(PromiseMapElement elem)
{
elem.Release();
}
