///-------------------------------------------------------------------------------------------------
/// <summary>
/// Get a transaction by id.
/// </summary>
/// <param name="index">
/// Zero-based index of the.
/// </param>
/// <returns>
/// The transaction.
/// </returns>
///-------------------------------------------------------------------------------------------------
public MemoryTransaction GetTransaction(long index)
{
if (index == 0)
{
return(null);
}
MemoryTransaction tx = null;
_transactions.TryGetValue(index, out tx);
return(tx);
}
///-------------------------------------------------------------------------------------------------
/// <summary>
/// Executes the transaction terminated action.
/// </summary>
/// <param name="transaction">
/// The transaction.
/// </param>
///-------------------------------------------------------------------------------------------------
public void OnTransactionTerminated(MemoryTransaction transaction)
{
Debug.Assert(transaction.Status != TransactionStatus.Active);
Debug.Assert(!transaction.IsNested);
lock (_activeTransactions)
_activeTransactions.Remove(transaction);
OnTransactionEnded(transaction, transaction.Status == TransactionStatus.Committed);
if (_trace.IsEnabled(TraceCategory.MemoryStore))
{
_trace.WriteTrace(TraceCategory.MemoryStore, "Memory transaction ended " + transaction.Id);
}
}
///-------------------------------------------------------------------------------------------------
/// <summary>
/// Create a new command context. If there is no current transaction, a transaction is created
/// and will be terminated when the context will be disposed.
/// </summary>
/// <param name="transactionManager">
/// .
/// </param>
/// <param name="readOnly">
/// true to read only.
/// </param>
/// <param name="isolationLevel">
/// (Optional)
/// </param>
///-------------------------------------------------------------------------------------------------
public CommandContext(ITransactionManager transactionManager, bool readOnly = false, SessionIsolationLevel isolationLevel = SessionIsolationLevel.Unspecified)
{
DebugContract.Requires(transactionManager, "transactionManager");
_transactionManager = transactionManager;
_currentTransaction = _transactionManager.CurrentTransaction ?? (_transaction = transactionManager.BeginTransaction(isolationLevel, readOnly));
// On s'assure qu' il existe une transaction courante
if (_currentTransaction.SessionIsolationLevel != SessionIsolationLevel.Serializable)
{
_activeTransactionsWhenStarted = transactionManager.GetActiveTransactions();
}
// N° de la commande dans le contexte de la transaction courante
CommandId = _currentTransaction.GetAnIncrementCurrentCommandId();
}
private void OnTransactionEnded(MemoryTransaction transaction, bool committed)
{
DebugContract.Requires(transaction);
var tmp = TransactionCompleted;
if (tmp != null)
{
try
{
tmp(transaction, new TransactionCompletedEventArgs(transaction.Id, committed, transaction.IsNested));
}
catch
{
}
}
}
///-------------------------------------------------------------------------------------------------
/// <summary>
/// Création d'une transaction (Scope = RequiredNested)
/// </summary>
/// <param name="isolationLevel">
/// .
/// </param>
/// <param name="readOnly">
/// true to read only.
/// </param>
/// <returns>
/// The new transaction.
/// </returns>
///-------------------------------------------------------------------------------------------------
private MemoryTransaction CreateTransaction(SessionIsolationLevel isolationLevel, bool readOnly)
{
var current = CurrentTransaction;
if (current == null)
{
var xid = Interlocked.Increment(ref _transactionNumber);
if (_trace.IsEnabled(TraceCategory.MemoryStore))
{
_trace.WriteTrace(TraceCategory.MemoryStore, "Create memory transaction {0} - Thread {1}", xid, ThreadHelper.CurrentThreadId);
}
current = new MemoryTransaction(_trace, this, xid, isolationLevel);
if (Session.Current != null)
{
CurrentTransaction = current;
}
if (!readOnly)
{
lock (_sync)
{
_transactions.Add(current.Id, current);
lock (_activeTransactions)
{
_activeTransactions.Add(current);
}
if (Session.Current != null)
{
Session.Current.Enlist(current);
}
}
}
}
else if (!readOnly)
{
current.PushNestedTransaction();
}
return(current);
}
