private static async Task CheckDifferentThreadsTransaction(TransactionalDictionary <string, int> collection)
{
await Task.Run(() =>
{
var tran = collection.BeginTransaction();
Console.WriteLine("Add transaction was created");
Console.WriteLine("Start adding 'a'");
collection.Add("a", 10500);
collection.Commit(tran);
Console.WriteLine("Add transaction was commited.");
});
await Task.Run(() =>
{
var tran = collection.BeginTransaction();
Console.WriteLine("Remove transaction was created");
Thread.Sleep(1000);
Console.WriteLine("Start removing 'a'");
collection.Remove("a");
collection.Commit(tran);
Console.WriteLine("Remove transaction was commited.");
});
}
private static void CheckCollection(TransactionalDictionary <string, int> collection)
{
collection.Add("a", 10504);
collection.Add("b", 228);
collection.Remove("a");
collection.Remove("b");
}
public void Run()
{
var collection = new TransactionalDictionary <string, int>();
CheckCollection(collection);
CheckTransaction(collection);
// Code from the lesson is wrong, because it creates different transactions at the same time.
// Remove can be applayed before add (second transaction before first).
CheckDifferentThreadsTransaction(collection).Wait();
}
private static void CheckTransaction(TransactionalDictionary <string, int> collection)
{
var tran = collection.BeginTransaction();
collection.Add("e", 11);
collection.Add("f", 2);
collection.Remove("e");
collection.Commit(tran);
tran = collection.BeginTransaction();
collection.Remove("f");
collection.Commit(tran);
}
