internal EnlistmentContext(Transaction transaction, EnlistmentPhase phase)
{
if(transaction == null)
throw new ArgumentNullException("transaction");
_transaction = transaction;
_phase = phase;
}
internal EnlistmentContext(Transaction transaction, EnlistmentPhase phase)
{
if (transaction == null)
{
throw new ArgumentNullException("transaction");
}
_transaction = transaction;
_phase = phase;
}
private void DoEnlistment(EnlistmentPhase phase)
{
var isCompleted = System.Threading.Interlocked.Exchange(ref _isCompleted, 1);
if (isCompleted != 0)
{
return;
}
//如果当前事务是跟随模式，并且具有父事务则当前事务不用通知投票者(订阅者)，而是交由父事务处理
if (_behavior == TransactionBehavior.Followed && _parent != null)
{
switch (phase)
{
case EnlistmentPhase.Abort:
_parent._operation = OPERATION_ABORT;
break;
case EnlistmentPhase.Rollback:
_parent._operation = OPERATION_ROLLBACK;
break;
}
//更新当前事务的状态
this.UpdateStatus(phase);
//退出当前子事务
return;
}
switch (_operation)
{
case OPERATION_ABORT:
phase = EnlistmentPhase.Abort;
break;
case OPERATION_ROLLBACK:
phase = EnlistmentPhase.Rollback;
break;
}
while (_enlistments.Count > 0)
{
var enlistment = _enlistments.Dequeue();
enlistment.OnEnlist(new EnlistmentContext(this, phase));
}
//更新当前事务的状态
this.UpdateStatus(phase);
}
private void UpdateStatus(EnlistmentPhase phase)
{
switch (phase)
{
case EnlistmentPhase.Abort:
case EnlistmentPhase.Rollback:
_status = TransactionStatus.Aborted;
break;
case EnlistmentPhase.Commit:
_status = TransactionStatus.Committed;
break;
default:
_status = TransactionStatus.Undetermined;
break;
}
}
internal EnlistmentContext(Transaction transaction, EnlistmentPhase phase)
{
_transaction = transaction;
_phase = phase;
}
