private void Handle(TransferTransactionStartedEvent evnt)
{
_transactionInfo = evnt.TransactionInfo;
Status = TransactionStatus.Started;
var participants = new TransactionParticipantInfo[] {
new TransactionParticipantInfo(_transactionInfo.SourceAccountId, (byte)AggregateRootTypes.BankAccount),
new TransactionParticipantInfo(_transactionInfo.TargetAccountId, (byte)AggregateRootTypes.BankAccount),
};
HandleTransactionStartedEvent((byte)TransactionTypes.TransferTransaction, participants);
}
private void Handle(DepositTransactionStartedEvent evnt)
{
_accountId = evnt.AccountId;
_amount = evnt.Amount;
Status = TransactionStatus.Started;
var participants = new TransactionParticipantInfo[] {
new TransactionParticipantInfo(evnt.AccountId, (byte)AggregateRootTypes.BankAccount)
};
HandleTransactionStartedEvent((byte)TransactionTypes.DepositTransaction, participants);
}
/// <summary>
/// Handle RolledbackParticipantAdded event
/// </summary>
/// <param name="transactionParticipant">事务参与方信息</param>
protected void HandleRolledbackParticipantAddedEvent(TransactionParticipantInfo transactionParticipant)
{
_rolledbackTransactionParticipants.Add(transactionParticipant);
}
/// <summary>
/// Handle CommittedParticipantAdded event
/// </summary>
/// <param name="transactionParticipant">事务参与方信息</param>
protected void HandleCommittedParticipantAddedEvent(TransactionParticipantInfo transactionParticipant)
{
_committedTransactionParticipants.Add(transactionParticipant);
}
/// <summary>
/// Handle PreCommitFailParticipantAdded event
/// </summary>
/// <param name="transactionId">事务ID</param>
/// <param name="transactionParticipant">事务参与方信息</param>
protected void HandlePreCommitFailParticipantAddedEvent(string transactionId, TransactionParticipantInfo transactionParticipant)
{
CurrentTransactionId = transactionId;
_preCommitFailTransactionParticipants.Add(transactionParticipant);
}
/// <summary> /// Create RolledbackParticipantAdded event /// </summary> /// <param name="transactionId">事务ID</param> /// <param name="transactionType">事务类型</param> /// <param name="participantInfo"></param> protected abstract TransactionInitiatorRolledbackParticipantAddedBase <TTransactionInitiator, TAggregateRootId> CreateRolledbackParticipantAddedEvent(string transactionId, byte transactionType, TransactionParticipantInfo participantInfo);
/// <summary> /// Create PreCommitFailParticipantAdded event /// </summary> /// <param name="transactionId">事务ID</param> /// <param name="transactionType">事务类型</param> /// <param name="participantInfo"></param> protected abstract TransactionInitiatorPreCommitFailedParticipantAddedBase <TTransactionInitiator, TAggregateRootId> CreatePreCommitFailParticipantAddedEvent(string transactionId, byte transactionType, TransactionParticipantInfo participantInfo);
/// <summary>
/// 添加已回滚的参与者（依次发布 RolledbackParticipantAdded 、 TransactionCompleted 事件）
/// </summary>
/// <param name="transactionId">事务ID</param>
/// <param name="transactionType">事务类型</param>
/// <param name="participantInfo"></param>
public void AddRolledbackParticipant(string transactionId, byte transactionType, TransactionParticipantInfo participantInfo)
{
if (participantInfo == null)
{
throw new ArgumentNullException(nameof(participantInfo));
}
if (string.IsNullOrEmpty(transactionId))
{
throw new ArgumentNullException(nameof(transactionId));
}
if (!IsTransactionProcessing)
{
throw new ApplicationException($"Initiator {Id} is not in transaction, couldn't execute AddCommittedParticipant command.");
}
if (transactionType != CurrentTransactionType)
{
throw new ApplicationException($"Initiator {Id}'s transaction type {transactionType} is not same as {CurrentTransactionType}");
}
if (!string.IsNullOrEmpty(CurrentTransactionId) && transactionId != CurrentTransactionId)
{
throw new ApplicationException($"Initiator {Id}'s transaction id {transactionId} is not same as {CurrentTransactionId}");
}
if (_committedTransactionParticipants.Count > 0 && participantInfo.IsParticipantAlreadyExists(_committedTransactionParticipants))
{
return;
}
if (_rolledbackTransactionParticipants.Count > 0 && participantInfo.IsParticipantAlreadyExists(_rolledbackTransactionParticipants))
{
return;
}
if (!IsAllPreCommitParticipantAdded())
{
throw new ApplicationException("Initiator {Id} didn't received all PreCommit participant, couldn't execute AddRolledbackParticipant command.");
}
if (_allTransactionParticipants == null || !_allTransactionParticipants.Any(w => w.ParticipantId == participantInfo.ParticipantId))
{
return;
}
ApplyEvent(CreateRolledbackParticipantAddedEvent(transactionId, transactionType, participantInfo));
if (IsAllCommittedAndRolledbackParticipantAdded())
{
// 所有参与者的提交和回滚都已处理
ApplyEvent(CreateTransactionCompletedEvent(transactionId, transactionType, _rolledbackTransactionParticipants.Count == 0));
}
}
/// <summary>
/// 添加预提交失败的参与者（依次发布 PreCommitFailParticipantAdded 、 AnyParticipantPreCommitFailed 事件）
/// </summary>
/// <param name="transactionId">事务ID</param>
/// <param name="transactionType">事务类型</param>
/// <param name="participantInfo"></param>
public void AddPreCommitFailedParticipant(string transactionId, byte transactionType, TransactionParticipantInfo participantInfo)
{
if (participantInfo == null)
{
throw new ArgumentNullException(nameof(participantInfo));
}
if (string.IsNullOrEmpty(transactionId))
{
throw new ArgumentNullException(nameof(transactionId));
}
if (!IsTransactionProcessing)
{
throw new ApplicationException($"Initiator {Id} is not in transaction, couldn't execute AddPreCommitFailedParticipant command.");
}
if (transactionType != CurrentTransactionType)
{
throw new ApplicationException($"Initiator {Id}'s transaction type {transactionType} is not same as {CurrentTransactionType}");
}
if (!string.IsNullOrEmpty(CurrentTransactionId) && transactionId != CurrentTransactionId)
{
throw new ApplicationException($"Initiator {Id}'s transaction id {transactionId} is not same as {CurrentTransactionId}");
}
if (_preCommitSuccessTransactionParticipants.Count > 0 && participantInfo.IsParticipantAlreadyExists(_preCommitSuccessTransactionParticipants))
{
return;
}
if (_preCommitFailTransactionParticipants.Count > 0 && participantInfo.IsParticipantAlreadyExists(_preCommitFailTransactionParticipants))
{
return;
}
if (_allTransactionParticipants == null || !_allTransactionParticipants.Any(w => w.ParticipantId == participantInfo.ParticipantId))
{
return;
}
ApplyEvent(CreatePreCommitFailParticipantAddedEvent(transactionId, transactionType, participantInfo));
if (IsAllPreCommitParticipantAdded())
{
// 所有预提交已添加
ApplyEvent(CreateAnyParticipantPreCommitFailedEvent(transactionId, transactionType, _preCommitSuccessTransactionParticipants));
if (IsAllPreCommitParticipantAddedAndFail())
{
// 所有预提交已添加且都失败，事务直接完成
ApplyEvent(CreateTransactionCompletedEvent(transactionId, transactionType, false));
}
}
}
protected override TransactionInitiatorRolledbackParticipantAddedBase <DepositTransaction, string> CreateRolledbackParticipantAddedEvent(string transactionId, byte transactionType, TransactionParticipantInfo participantInfo)
{
//TODO: 存款，假定不存在需要回滚的场景
throw new NotImplementedException();
}
protected override TransactionInitiatorCommittedParticipantAddedBase <DepositTransaction, string> CreateCommittedParticipantAddedEvent(string transactionId, byte transactionType, TransactionParticipantInfo participantInfo)
{
return(new DepositTransactionCommittedParticipantAddedEvent(participantInfo.ParticipantId, transactionId));
}
/// <summary>
/// 已回滚的事务参与方已添加事件基类
/// </summary>
/// <param name="transactionId">事务ID</param>
/// <param name="transactionType">事务类型</param>
/// <param name="transactionParticipant">事务参与方信息</param>
protected TransactionInitiatorRolledbackParticipantAddedBase(string transactionId, byte transactionType, TransactionParticipantInfo transactionParticipant)
{
TransactionId = transactionId;
TransactionType = transactionType;
TransactionParticipant = transactionParticipant;
}
/// <summary>
/// 预提交失败的事务参与方已添加事件基类
/// </summary>
/// <param name="transactionId">事务ID</param>
/// <param name="transactionType">事务类型</param>
/// <param name="transactionParticipant">事务参与方信息</param>
protected TransactionInitiatorPreCommitFailedParticipantAddedBase(string transactionId, byte transactionType, TransactionParticipantInfo transactionParticipant)
{
TransactionId = transactionId;
TransactionType = transactionType;
TransactionParticipant = transactionParticipant;
}
protected override TransactionInitiatorRolledbackParticipantAddedBase <TransferTransaction, string> CreateRolledbackParticipantAddedEvent(string transactionId, byte transactionType, TransactionParticipantInfo participantInfo)
{
return(new TransferTransactionRolledbackParticipantAddedEvent(participantInfo.ParticipantId, transactionId));
}
protected override TransactionInitiatorPreCommitFailedParticipantAddedBase <TransferTransaction, string> CreatePreCommitFailParticipantAddedEvent(string transactionId, byte transactionType, TransactionParticipantInfo participantInfo)
{
return(new TransferTransactionPreCommitFailedParticipantAdded(participantInfo.ParticipantId, transactionId));
}
protected override TransactionInitiatorPreCommitSucceedParticipantAddedBase <TransferTransaction, string> CreatePreCommitSuccessParticipantAddedEvent(string transactionId, byte transactionType, TransactionParticipantInfo participantInfo)
{
var preparationType = _transactionInfo.SourceAccountId == participantInfo.ParticipantId ? PreparationTypes.DebitPreparation : PreparationTypes.CreditPreparation;
return(new TransferTransactionPreCommitSucceedParticipantAdded(participantInfo.ParticipantId, transactionId, preparationType));
}