Si dovrebbe implementare System.Transactions.IEnlistmentNotification
interfaccia, this articolo e this può aiutare a
Per transazionale di storage ready-made in memoria, non v'è (Software transactional memory), e STM.NET non è una roba di finale, ma Microsoft ci sta lavorando!
Un piccolo esempio:
using System.IO;
using System.Text;
using System.Transactions;
namespace Sakher.Transactions
{
public class TsansactionalFileWriter
{
private FileTransactionEnlistment fileTransactionEnlistment = new FileTransactionEnlistment();
public TsansactionalFileWriter(string filePath)
{
fileTransactionEnlistment.FilePath = filePath;
Transaction.Current.EnlistVolatile(fileTransactionEnlistment, EnlistmentOptions.None);
}
public void AppendText(string text)
{
fileTransactionEnlistment.Content.Append(text);
}
public void WriteAllText(string text)
{
fileTransactionEnlistment.Content = new StringBuilder(text);
}
}
public class FileTransactionEnlistment : IEnlistmentNotification
{
public string FilePath { get; set; }
public StringBuilder Content { get; set; }
public FileTransactionEnlistment()
{
Content = new StringBuilder();
}
public void Commit(Enlistment enlistment)
{
File.WriteAllText(FilePath, Content.ToString());
}
public void InDoubt(Enlistment enlistment)
{
}
public void Prepare(PreparingEnlistment preparingEnlistment)
{
//You can create the file here
preparingEnlistment.Prepared();
}
public void Rollback(Enlistment enlistment)
{
//Do ssomething when the transaction is rolled-back (You may delete the file if you have created it!)
}
}
}
Consumare il codice:
using (TransactionScope tr = new TransactionScope())
{
TsansactionalFileWriter writer = new TsansactionalFileWriter("c:\\myFile.txt");
writer.AppendText("sdfgssdfgsdf");
tr.Complete();
}
* EDTI: AGGIUNTO G CUSTODE PER Royi :) *
using System.Transactions;
namespace Sakher.Transactions
{
public class Royi_s_gReturnerClass
{
private GReturnerEnlistment fileTransactionEnlistment = new GReturnerEnlistment();
public Royi_s_gReturnerClass()
{
Transaction.Current.EnlistVolatile(fileTransactionEnlistment, EnlistmentOptions.None);
}
}
public class GReturnerEnlistment : IEnlistmentNotification
{
public int GOldValue { get; set; }
public GReturnerEnlistment()
{
GOldValue = MyClass.g;
}
public void Commit(Enlistment enlistment)
{
}
public void InDoubt(Enlistment enlistment)
{
}
public void Prepare(PreparingEnlistment preparingEnlistment)
{
preparingEnlistment.Prepared();
}
public void Rollback(Enlistment enlistment)
{
MyClass.g = GOldValue;
}
}
}
il codice sarà :
class MyClass { public static int g=1;}
using (TransactionScope tsTransScope = new TransactionScope())
{
Royi_s_gReturnerClass returner = new Royi_s_gReturnerClass();
//Do stuff here
MyClass.g=999;
tsTransScope.Complete();
}
fonte
2012-12-30 09:22:46
Ci sono alcune interfacce da implementare per essere transazionali, è necessario fare qualcosa quando si esegue il rollback o il commento, vero? –
@MSakherSawan I _assume_ c'è. Questa è la mia domanda in realtà. –