private void CheckAndRunNext(TccRunningContext <TContext> rc)
{
if (rc != null)
{
_txState = rc.NextState;
if (_txState == TccTransactionState.Confirmed)
{
if (_coordinator != null)
{
_coordinator.CloseTransaction(this);
}
_txCtx.Return();
return;
}
else if (_txState == TccTransactionState.Cancelled)
{
if (_coordinator != null)
{
_coordinator.CloseTransaction(this);
}
_txCtx.ThrowException("Transaction Cancelled", GetFirstError());
return;
}
else if (_txState == TccTransactionState.ConfirmFailed || _txState == TccTransactionState.CancelFailed)
{
if (_coordinator != null)
{
_coordinator.CloseTransaction(this);
}
_txCtx.ThrowException("Transaction Failed", GetFirstError());
return;
}
else
{
if (_coordinator != null)
{
_coordinator.UpdateTransaction(this);
}
}
}
lock (_syncRoot) {
rc = GetRunningContext();
}
_tracing.InfoFmt("NextRunningContext() = {0}", rc);
rc.Run(
delegate() {
try {
CheckAndRunNext(rc);
} catch (Exception ex) {
_tracing.Error(ex, "CheckAndRunNext() Failed");
_txCtx.ThrowException("TccTransaction.CheckAndRunNext() Failed", ex);
}
}
);
}
private TccRunningContext <TContext> GetRunningContext()
{
TccRunningContext <TContext> rc = new TccRunningContext <TContext>(_context, _tracing);
TccTransactionState nextState;
switch (_txState)
{
case TccTransactionState.LockTrying:
rc.AddWork(_lock, TccAction.Try);
rc.SetNextState(TccTransactionState.Trying, TccTransactionState.Cancelling);
break;
case TccTransactionState.Trying:
bool hasNext = false;
foreach (var a in _works)
{
if (a.WorkState != TccWorkState.Tryed)
{
if (a.CanTry())
{
rc.AddWork(a, TccAction.Try);
}
else
{
hasNext = true;
}
}
}
nextState = hasNext ? TccTransactionState.Trying : TccTransactionState.Confirming;
rc.SetNextState(nextState, TccTransactionState.Cancelling);
break;
case TccTransactionState.Confirming:
foreach (var a in _works)
{
if (a.WorkState != TccWorkState.Confirmed)
{
rc.AddWork(a, TccAction.Confirm);
}
}
nextState = _lock != null ? TccTransactionState.LockConfirming :TccTransactionState.Confirmed;
rc.SetNextState(nextState, TccTransactionState.ConfirmFailed);
break;
case TccTransactionState.LockConfirming:
rc.AddWork(_lock, TccAction.Confirm);
rc.SetNextState(TccTransactionState.Confirmed, TccTransactionState.ConfirmFailed);
break;
case TccTransactionState.Cancelling:
foreach (var a in _works)
{
if (a.WorkState != TccWorkState.Cancelled && a.WorkState != TccWorkState.None)
{
rc.AddWork(a, TccAction.Cancel);
}
}
nextState = _lock != null ? TccTransactionState.LockCanceling :TccTransactionState.Cancelled;
rc.SetNextState(nextState, TccTransactionState.CancelFailed);
break;
case TccTransactionState.LockCanceling:
rc.AddWork(_lock, TccAction.Cancel);
rc.SetNextState(TccTransactionState.Cancelled, TccTransactionState.CancelFailed);
break;
}
return(rc);
}
