c# - 从事务中排除操作

Question

给定启用事务流的事务感知绑定(bind)和具有 TransactionFlowOption.Allowed 的操作 Op1，是否可以使从操作 Op1 调用的不同操作 Op2 不参与事务，以便 Op2 不执行的任何操作永远不会回滚以防 Op1 操作失败

插图

// Op1: LogOnUser
OperationBehavior(TransactionScopeRequired = true)]
public bool LogOnUser(String username, String password)
{
    // AuditWriteProxy declaration and instantiation
    var valid = false;

    /* Validation logic */

    // If validation failed
    if(!valid)
    {
        // Invoke an op in an Audit Service. 
         // Op2 = AuditService.Write
        // **MUST NOT BE ROLLED BACK EVEN AFTER WE [throw]**
       AuditServiceProxy.Write("Authentication failed for user " + username);

        throw new FaultException<AuthenticationFault>("Validation failed");
        // After throw, we expect everything transactional to rollback
    }

    AuditServiceProxy.Write("User " + username + " authenticated successfully");

    return true;
}

注意事项:

1. AuditService.Write 操作使用 msmq 绑定(bind)并且是单向的
2. 我在 AuditService.Write 操作契约(Contract)上尝试了 TransactionFlowOption.NotAllowed，在实现上尝试了 TransactionScopeRequired=false。

Answer 1

您可以在 TransactionScope 中使用 TransactionScopeOption.Suppress:

using (TransactionScope scope = new TransactionScope(TransactionScopeOption.Suppress)) 
{ 
   AuditServiceProxy.Write("Authentication failed for user " + username); 
} 

或将此抑制代码放入 NonTransactionalLoggingService 方法调用中