/// <summary>
/// Handlers for the ComboBox class of controls.
/// </summary>
/// <param name="sender">The object that originated the event.</param>
/// <param name="routedEventArgs">The routed event arguments.</param>
private void OnSelectorSelectionChanged(object sender, RoutedEventArgs routedEventArgs)
{
// The main idea of this handler is to sort out the user generated actions from the machine generated actions. Once
// its determined that it was a user action, a background thread is called to change the associated field to the value
// selected by the ComboBox.
SelectionChangedEventArgs selectionChangedEventArgs = routedEventArgs as SelectionChangedEventArgs;
// Handle changes to ComboBox elements.
if (selectionChangedEventArgs.OriginalSource is ComboBox)
{
ComboBox comboBox = selectionChangedEventArgs.OriginalSource as ComboBox;
IContent iContent = comboBox.DataContext as IContent;
// This filters all the ComboBox events looking for user initiated actions that are bound to the data model.
if (InputHelper.IsUserInitiated(comboBox, ComboBox.SelectedValueProperty) &&
iContent != null && iContent.Key is DataTableCoordinate)
{
// At this point, a ComboBox was modified by the user and it is connected to a data model field. This will extract
// the coordinates of the field in the table. That, in turn, drives the decision about how to update the shared
// data model.
DataTableCoordinate dataTableCoordiante = iContent.Key as DataTableCoordinate;
ExecutionRow executionRow = dataTableCoordiante.DataRow as ExecutionRow;
}
}
}
// exemplo: w1(x)-r2(y)-w2(y)-c2-w1(y)
public void History(string entryTransaction, TextBox output, TextBox RunningRow, TextBox WaitingTransaction, TextBox AbortedTransaction, TextBox Queue, TextBox DataLock)
{
string[] transactionList;
// Quebra a string de entrada em um vetor de string
transactionList = entryTransaction.Split('-');
OutPut = output;
if (ExecutionRow == null)
{
ExecutionRow = new Queue <string>(transactionList);
}
if (ExecutionRow.Count > 0)
{
RunCommand(ExecutionRow.Dequeue());
CheckWaitingQueue();
RunningRow.Text = RetornaRunningRow();
WaitingTransaction.Text = ReturnWaitingTransactions();
AbortedTransaction.Text = ReturnTransactionsAborteds();
Queue.Text = ReturnQueue();
DataLock.Text = ReturnDataLock();
SetFinalPoint(OutPut);
RunningRow.Refresh();
WaitingTransaction.Refresh();
AbortedTransaction.Refresh();
DataLock.Refresh();
SetFinalPoint(Queue);
}
else
{
OutPut.Text += "\r\nExecução finalizada.";
SetFinalPoint(OutPut);
}
}
public static async Task <IActionResult> Run(
[HttpTrigger(AuthorizationLevel.Function, "get", Route = null)] HttpRequest req,
[Table("executionsTable", Connection = "StorageAccount")] ICollector <ExecutionRow> outputTable,
ILogger log)
{
log.LogInformation($"{FunctionNames.MortgageCalculatorFunction} start");
// Retrieve loan, interest and numberOfPayments from HTTP Request
#region [ Retrieve request parameters ]
decimal loan;
if (!GetLoanFromQueryString(req, out loan))
{
log.LogError($"Loan not valid");
return(new BadRequestObjectResult("Loan not valid"));
}
double interest;
if (!GetInterestFromQueryString(req, out interest))
{
log.LogError($"Annual Interest not valid");
return(new BadRequestObjectResult("Annual Interest not valid"));
}
uint nPayments;
if (!GetNumberOfPaymentsFromQueryString(req, out nPayments))
{
log.LogError($"Number of payments not valid");
return(new BadRequestObjectResult("Number of payments not valid"));
}
#endregion [ Retrieve request parameters ]
var calculatorResult =
await mortgageCalculator.CalculateMontlyRateAsync(loan, interest, nPayments);
#region [ Create the response ]
var executionRow = new ExecutionRow(DateTime.Now)
{
AnnualInterest = interest,
ErrorCode = calculatorResult.Error?.Code,
MonthlyRate = calculatorResult.Result,
MortgageLoan = loan,
NumberOfPayments = nPayments,
Result = calculatorResult.Succeed
};
outputTable.Add(executionRow);
#endregion [ Create the response ]
if (calculatorResult.Succeed)
{
return(new OkObjectResult(calculatorResult.Result));
}
return(new BadRequestObjectResult(calculatorResult.Error.Message));
}
/// <summary>
/// Handlers for the Toggle button class of controls.
/// </summary>
/// <param name="sender">The object that originated the event.</param>
/// <param name="routedEventArgs">The routed event arguments.</param>
private void OnToggleButtonChange(object sender, RoutedEventArgs routedEventArgs)
{
// The main idea of this handler is to sort out the user generated actions from the machine generated actions. Once
// its determined that it was a user action, a background thread is called to change the associated field to the value
// selected by the ToggleButton.
ToggleButton toggleButton = routedEventArgs.OriginalSource as ToggleButton;
IContent iContent = toggleButton.DataContext as IContent;
// This filters all the ToggleButton events looking for user initiated actions that are bound to the data model.
if (InputHelper.IsUserInitiated(toggleButton, ToggleButton.IsCheckedProperty) &&
iContent != null && iContent.Key is DataTableCoordinate)
{
// At this point, a ToggleButton was modified by the user and it is connected to a data model field. This will
// extract the coordinates of the field in the table. That, in turn, drives the decision about how to update the
// shared data model.
DataTableCoordinate dataTableCoordiante = iContent.Key as DataTableCoordinate;
ExecutionRow executionRow = dataTableCoordiante.DataRow as ExecutionRow;
}
}
private void CheckWaitingQueue()
{
// Analisa primeiro comando de cada transação.
List <int> excludes = new List <int>();
foreach (var TransactionNumber in WaitingTransactionsList.Keys)
{
TransactionQueueCommand commandsTransactions = WaitingTransactionsList[TransactionNumber];
if (!commandsTransactions.Transaction.LockType.Equals(TransactionTypeLock.Aborted))
{
string firstCommand = commandsTransactions.CheckCommand();
LockDataType LockDataType = ReturnLockType(firstCommand.Substring(0, 1));
FreeData freeData = ReturnFreeData(commandsTransactions.Transaction, LockDataType, commandsTransactions.WaitingData);
// Se o dado estiver disponivel remove todos os dados da fila e adiciona novamente à fila de execução
int RemovedTransaction = 0;
string ciclo = "";
string retorno = "";
switch (freeData)
{
case FreeData.FreeData:
case FreeData.SharedTransactionsData:
case FreeData.OtherSharedTransactionsData:
Queue <string> tempQueue = new Queue <string>();
// Remove tudo que está na fila de execução para adicionar a fila de espera na frente
while (ExecutionRow.Count > 0)
{
tempQueue.Enqueue(ExecutionRow.Dequeue());
}
while (commandsTransactions.QueueCommands.Count > 0)
{
AddOutPut("Comando: " + commandsTransactions.CheckCommand() + " adicionado à fila de execução.");
ExecutionRow.Enqueue(commandsTransactions.RemoveCommand());
}
// Adiciona os commandos de volta a fila de execução
while (tempQueue.Count > 0)
{
ExecutionRow.Enqueue(tempQueue.Dequeue());
}
commandsTransactions.Transaction.LockType = TransactionTypeLock.Executing;
// Adiciona à lista de excluídos para remover no final
excludes.Add(TransactionNumber);
break;
case FreeData.ExclusiveOtherTransactionsData:
// Realiza validação para analisar se a transação entrou em deadlock
retorno = CheckDeadLock(TransactionNumber, commandsTransactions.WaitingData);
RemovedTransaction = int.Parse(retorno.Substring(0, retorno.IndexOf("|")));
ciclo = retorno.Substring(retorno.IndexOf("|") + 1);
if (RemovedTransaction > -1)
{
excludes.Add(RemovedTransaction);
// Desaloca dados da transação.
string msg = "";
Transactions Transactions = TransactionsList[RemovedTransaction];
// Realiza unlock do dado e retira da lista de dados utilizados.
string[] usedData = Transactions.ReturnDataUsed();
msg = "----------- DEAD LOCK ----------- " + "\r\n";
msg += ciclo + "\r\n";
msg += "Transação " + RemovedTransaction + " eliminada, pois foi a que executou menos comandos.\r\n";
AddOutPut(msg);
foreach (var dado in usedData)
{
// Adiciona saída unclok para dados liberados
AddOutPut(CreateLock(LockDataType.Unlock, Transactions.TransactionNumber, dado, Transactions.ReturnDataLockType(dado)));
// Remove dado e transação da lista de dados locks
RemoveDataLocksList(Transactions, dado);
// Remove dado da lista de transações
Transactions.RemoveData(dado);
}
Transactions.LockType = TransactionTypeLock.Aborted;
}
break;
}
}
}
foreach (var transactionNumber in excludes)
{
WaitingTransactionsList.Remove(transactionNumber);
}
}
private bool FilterBlotters(ExecutionRow executionRow)
{
return(this.blotterList.BinarySearch(executionRow.BlotterId) >= 0);
}
private Schema.Execution.Execution MatchSelector(ExecutionRow executionRow)
{
Schema.Execution.Execution match = new Schema.Execution.Execution();
return(match.Select(executionRow));
}
/// <summary>
/// Handler for validating Execution records.
/// </summary>
/// <param name="sender">The object that originated the event.</param>
/// <param name="e">The event arguments.</param>
internal static void OnExecutionRowValidate(object sender, ExecutionRowChangeEventArgs e)
{
DestinationOrderRow destinationOrderRow;
Decimal executedQuantity;
DataModelTransaction dataModelTransaction;
Decimal orderedQuantity;
// The Business Rules will be enforced on this Execution. Note that it is locked at the point this handler is called.
ExecutionRow executionRow = e.Row;
// The action on the row determines which rule to evaluate.
switch (e.Action)
{
case DataRowAction.Add:
// This rule will update the status of the owning Destination Order based on the quantity executed.
dataModelTransaction = DataModelTransaction.Current;
// The aggregate of the quantities executed will determine whether the Destination Order requires a status change.
destinationOrderRow = executionRow.DestinationOrderRow;
destinationOrderRow.AcquireReaderLock(dataModelTransaction);
if (destinationOrderRow.RowState == DataRowState.Detached)
{
return;
}
// This calculates the quantity outstanding on an order and the quantity executed on the order.
orderedQuantity = destinationOrderRow.OrderedQuantity - destinationOrderRow.CanceledQuantity;
executedQuantity = 0.0M;
foreach (ExecutionRow siblingRow in destinationOrderRow.GetExecutionRows())
{
siblingRow.AcquireReaderLock(dataModelTransaction);
executedQuantity += siblingRow.ExecutionQuantity;
}
// This rule will set the status on the owning Destination Order based on the amont outstanding and the amount ordered. First, if the quantity
// executed is greater than the quantity ordered, the Order goes into an error state. We can't reject executions as they come from an external
// source, but the order can be flag and put into an error state.
if (executedQuantity > orderedQuantity)
{
if (destinationOrderRow.StatusId != StatusMap.FromCode(Status.Error))
{
UpdateDestinationOrderStatus(destinationOrderRow, Status.Error);
}
}
else
{
// When the total quantity executed is reduced to zero then the order goes back into the initial state.
if (executedQuantity == 0.0m)
{
if (destinationOrderRow.StatusId != StatusMap.FromCode(Status.New))
{
UpdateDestinationOrderStatus(destinationOrderRow, Status.New);
}
}
else
{
// While the executed quantity is still less than the outstanding quantity the order is consdered to be partially filled. Otherwise,
// the order is completely filled.
if (executedQuantity < orderedQuantity)
{
if (destinationOrderRow.StatusId != StatusMap.FromCode(Status.PartiallyFilled))
{
UpdateDestinationOrderStatus(destinationOrderRow, Status.PartiallyFilled);
}
}
else
{
if (destinationOrderRow.StatusId != StatusMap.FromCode(Status.Filled))
{
UpdateDestinationOrderStatus(destinationOrderRow, Status.Filled);
}
}
}
}
break;
case DataRowAction.Delete:
// A middle tier context is required to lock the rows so the quantities can be aggregated.
dataModelTransaction = DataModelTransaction.Current;
// The aggregate of the quantities executed will determine whether the Destination Order requires a status change.
destinationOrderRow = (DestinationOrderRow)executionRow.GetParentRow(
DataModel.Execution.DestinationOrderExecutionRelation,
DataRowVersion.Original);
destinationOrderRow.AcquireReaderLock(dataModelTransaction);
if (destinationOrderRow.RowState == DataRowState.Detached)
{
return;
}
// This calculates the quantity outstanding on an order and the quantity executed on the order.
orderedQuantity = destinationOrderRow.OrderedQuantity - destinationOrderRow.CanceledQuantity;
executedQuantity = 0.0M;
foreach (ExecutionRow siblingRow in destinationOrderRow.GetExecutionRows())
{
siblingRow.AcquireReaderLock(dataModelTransaction);
executedQuantity += siblingRow.ExecutionQuantity;
}
// When the total quantity executed is reduced to zero then the order goes back into the initial state. Note that it is impossible for the
// order to transition into a error state by deleting an execution.
if (executedQuantity == 0.0m)
{
if (destinationOrderRow.StatusId != StatusMap.FromCode(Status.New))
{
UpdateDestinationOrderStatus(destinationOrderRow, Status.New);
}
}
else
{
// While the executed quantity is still less than the outstanding quantity the order is consdered to be partially filled. Note that it is
// impossible for the order to transition to a filled state by deleting an execution.
if (executedQuantity < orderedQuantity)
{
if (destinationOrderRow.StatusId != StatusMap.FromCode(Status.PartiallyFilled))
{
UpdateDestinationOrderStatus(destinationOrderRow, Status.PartiallyFilled);
}
}
}
break;
}
}
