/// <summary>
/// Reset the negotiation to a "in negotiation" state.
/// </summary>
/// <param name="consumerDebtNegotiations">The the negotiations to reset.</param>
internal static void Reject(ConsumerDebtNegotiationInfo[] consumerDebtNegotiations)
{
// An instance of the shared data model is required to use its methods.
DataModel dataModel = new DataModel();
// The business logic requires the current time and the user identifier for auditing.
Guid createUserId = TradingSupport.UserId;
DateTime createDateTime = DateTime.UtcNow;
DateTime modifiedTime = createDateTime;
Guid modifiedUserId = createUserId;
// This Web Method comes with an implicit transaction that is linked to its execution.
DataModelTransaction dataModelTransaction = DataModelTransaction.Current;
// This method can handle a batch of updates in a single transaction.
foreach (ConsumerDebtNegotiationInfo consumerDebtNegotiationInfo in consumerDebtNegotiations)
{
// The blotter is not passed in from the client but is used
Guid blotterId = Guid.Empty;
Status negotiationStatus;
DebtNegotiationInfo debtNegotiationInfo = null;
// This is the next negotiation in the batch to be updated.
ConsumerDebtNegotiationRow consumerDebtNegotiationRow =
DataModel.ConsumerDebtNegotiation.ConsumerDebtNegotiationKey.Find(consumerDebtNegotiationInfo.ConsumerDebtNegotiationId);
// The payment methods available to this negotiation is a vector. Rather than delete everything and re-add it anytime an update is made, a
// list of changes is constructed: new payment methods are added, obsolete payment methods are deleted and the ones that haven't changed are
// left alone. These list help to work out the differences.
List <ConsumerDebtNegotiationPaymentMethodTypeInfo> counterItems = new List <ConsumerDebtNegotiationPaymentMethodTypeInfo>();
try
{
// Lock the current negotation record for reading. The data model doesn't support reader lock promotion, so the programming model is to
// lock the database, collect the data, release the locks and then write. This model is especially important when iterating through a
// large batch to prevent the number of locks from growing to large.
consumerDebtNegotiationRow.AcquireReaderLock(dataModelTransaction.TransactionId, DataModel.LockTimeout);
// The blotter identifier is used for access control and is not passed in by the client.
blotterId = consumerDebtNegotiationRow.BlotterId;
debtNegotiationInfo = new DebtNegotiationInfo(consumerDebtNegotiationRow);
negotiationStatus = StatusMap.FromId(consumerDebtNegotiationRow.StatusId);
// Determine whether the client has the right to modify this record.
if (!TradingSupport.HasAccess(dataModelTransaction, blotterId, AccessRight.Write))
{
throw new FaultException <FluidTrade.Core.SecurityFault>(new SecurityFault("You do not have write access to the selected object."));
}
MatchRow matchRow = DataModel.Match.MatchKey.Find(debtNegotiationInfo.MatchId);
try
{
matchRow.AcquireReaderLock(dataModelTransaction.TransactionId, DataModel.LockTimeout);
debtNegotiationInfo.MatchRowVersion = matchRow.RowVersion;
debtNegotiationInfo.ContraMatchId = matchRow.ContraMatchId;
}
finally
{
matchRow.ReleaseReaderLock(dataModelTransaction.TransactionId);
}
MatchRow contraMatchRow = DataModel.Match.MatchKey.Find(debtNegotiationInfo.ContraMatchId);
try
{
contraMatchRow.AcquireReaderLock(dataModelTransaction.TransactionId, DataModel.LockTimeout);
debtNegotiationInfo.ContraMatchRowVersion = contraMatchRow.RowVersion;
}
finally
{
contraMatchRow.ReleaseReaderLock(dataModelTransaction.TransactionId);
}
// The payment methods are maintained as a vector associated with the negotiation record. This will lock each of the records and read the
// payment methods into a data structure so the locks don't need to be held when it is time to write.
foreach (var consumerDebtNegotiationOfferPaymentMethodRow
in consumerDebtNegotiationRow.GetConsumerDebtNegotiationCounterPaymentMethodRows())
{
try
{
// Temporarily lock the record containing the payment method.
consumerDebtNegotiationOfferPaymentMethodRow.AcquireReaderLock(dataModelTransaction.TransactionId, DataModel.LockTimeout);
// This will construct a mask of items that are already part of this negotiation. The mask is used to prevent an item from being
// added if it's already there.
// This list is used to delete the payment methods that are no longer part of this negotiation.
counterItems.Add(
new ConsumerDebtNegotiationPaymentMethodTypeInfo(
consumerDebtNegotiationOfferPaymentMethodRow.PaymentMethodTypeId,
consumerDebtNegotiationOfferPaymentMethodRow.ConsumerDebtNegotiationCounterPaymentMethodId,
consumerDebtNegotiationOfferPaymentMethodRow.RowVersion));
}
finally
{
// At this point the payment method isn't needed.
consumerDebtNegotiationOfferPaymentMethodRow.ReleaseReaderLock(dataModelTransaction.TransactionId);
}
}
}
finally
{
// At this point, the negotiation record isn't needed. It is critical to release the reader locks before attempting a write.
consumerDebtNegotiationRow.ReleaseReaderLock(dataModelTransaction.TransactionId);
}
// At this point, all the data for this operation has been collected and the CRUD operations can be invoked to finish the update. Note that
// the counter party information is not modified here, but is done through the Chinese wall.
Guid newConsureDebtNegotiationId = Guid.NewGuid();
dataModel.CreateConsumerDebtNegotiation(
debtNegotiationInfo.AccountBalance,
debtNegotiationInfo.BlotterId,
newConsureDebtNegotiationId,
debtNegotiationInfo.CounterPaymentLength,
debtNegotiationInfo.CounterPaymentStartDateLength,
debtNegotiationInfo.CounterPaymentStartDateUnitId,
debtNegotiationInfo.CounterSettlementUnitId,
debtNegotiationInfo.CounterSettlementValue,
modifiedTime,
modifiedUserId,
debtNegotiationInfo.IsRead,
debtNegotiationInfo.IsReply,
debtNegotiationInfo.MatchId,
modifiedTime,
modifiedUserId,
consumerDebtNegotiationInfo.PaymentLength,
consumerDebtNegotiationInfo.PaymentStartDateLength,
consumerDebtNegotiationInfo.PaymentStartDateUnitId,
consumerDebtNegotiationInfo.SettlementUnitId,
consumerDebtNegotiationInfo.SettlementValue,
StatusMap.FromCode(Status.Rejected),
out debtNegotiationInfo.Version);
// This will add the payment methods to the negotiation that are not already there.
foreach (Guid paymentMethodTypeId in consumerDebtNegotiationInfo.PaymentMethodTypes)
{
dataModel.CreateConsumerDebtNegotiationOfferPaymentMethod(
blotterId,
newConsureDebtNegotiationId,
Guid.NewGuid(),
paymentMethodTypeId);
}
//This will delete those payment methods that are no longer part of the negotiation.
foreach (ConsumerDebtNegotiationPaymentMethodTypeInfo consumerDebtNegotiationPaymentMethodTypeInfo in counterItems)
{
dataModel.UpdateConsumerDebtNegotiationCounterPaymentMethod(blotterId,
null,
new Object[] { consumerDebtNegotiationPaymentMethodTypeInfo.ConsumerDebtNegotiationOfferPaymentMethodId },
newConsureDebtNegotiationId,
null,
consumerDebtNegotiationPaymentMethodTypeInfo.RowVersion);
}
//Reset the Match Status Id. This is required so the match engine will redo the match. The
//match engine does not recalculate if it is not in the initial three stages of - Valid, Partial, ValidwithFunds
dataModel.UpdateMatch(
null,
null,
null,
null,
null,
null,
null,
new object[] { debtNegotiationInfo.MatchId },
debtNegotiationInfo.MatchRowVersion,
StatusMap.FromCode(Status.ValidMatch),
null);
//Reset the Contra Match Status Id
dataModel.UpdateMatch(
null,
null,
null,
null,
null,
null,
null,
new object[] { debtNegotiationInfo.ContraMatchId },
debtNegotiationInfo.ContraMatchRowVersion,
StatusMap.FromCode(Status.ValidMatch),
null);
}
}
