public override IFdbTransaction BeginTransaction(FdbTransactionMode mode, CancellationToken cancellationToken = default(CancellationToken), FdbOperationContext context = null)
{
return new FdbLoggedTransaction(
base.BeginTransaction(mode, cancellationToken, context),
true,
this.OnCommitted
);
}
public IFdbTransactionHandler CreateTransaction(FdbOperationContext context)
{
TransactionHandle handle = null;
try
{
var err = FdbNative.DatabaseCreateTransaction(m_handle, out handle);
if (Fdb.Failed(err))
{
throw Fdb.MapToException(err);
}
return new FdbNativeTransaction(this, handle);
}
catch(Exception)
{
if (handle != null) handle.Dispose();
throw;
}
}
private CancellationToken m_cancellation; //PERF: readonly struct
#endregion
#region Constructors...
internal FdbTransaction(FdbDatabase db, FdbOperationContext context, int id, IFdbTransactionHandler handler, FdbTransactionMode mode)
{
Contract.Requires(db != null && context != null && handler != null);
Contract.Requires(context.Database != null);
m_context = context;
m_database = db;
m_id = id;
//REVIEW: the operation context may already have created its own CTS, maybe we can merge them ?
m_cts = CancellationTokenSource.CreateLinkedTokenSource(context.Cancellation);
m_cancellation = m_cts.Token;
m_readOnly = (mode & FdbTransactionMode.ReadOnly) != 0;
m_handler = handler;
}
public Task <TResult> ReadAsync <TResult>(Func <IFdbReadOnlyTransaction, Task <TResult> > handler, Action <IFdbReadOnlyTransaction, TResult> success, CancellationToken ct)
{
ThrowIfDisposed();
return(FdbOperationContext.RunReadWithResultAsync <TResult>(this, handler, success, ct));
}
public Task <TResult> ReadAsync <TState, TResult>(TState state, Func <IFdbReadOnlyTransaction, TState, Task <TResult> > handler, CancellationToken ct)
{
ThrowIfDisposed();
return(FdbOperationContext.RunReadWithResultAsync <TResult>(this, (tr) => handler(tr, state), ct));
}
public virtual IFdbTransaction BeginTransaction(FdbTransactionMode mode, CancellationToken ct = default, FdbOperationContext context = null)
{
ThrowIfDisposed();
// enforce read-only mode!
if (m_readOnly)
{
mode |= FdbTransactionMode.ReadOnly;
}
if (context == null)
{
context = new FdbOperationContext(this, mode, ct);
}
return(m_database.BeginTransaction(mode, ct, context));
}
