/// <summary>
/// Evaluates a given position for a restricted security.
/// </summary>
/// <param name="action">Indicates whether the position is being added, modified or deleted.</param>
/// <param name="position">An account, security and position type (long or short) combination.</param>
private static void EndMerge(object sender, EventArgs eventArgs)
{
foreach (Position position in AlphaListRule.updatePositionTable)
{
Violation violation = Violation.Find(restriction, position);
if (position.GetQuantity() == 0.0M)
{
if (violation != null)
{
violation.Remove();
}
}
else
{
if (violation == null)
{
Violation.Add(restriction, position, position.Security.Symbol, position.Account.Name);
}
}
}
}
/// <summary>
/// Install an event driven compliance check and initialize the violations table.
/// </summary>
static AlphaListRule()
{
// This will create a table of positions for every combination of a restricted securities in a restricted account.
// This is just one example of how a set of restricted positions could be created.
AlphaListRule.alphaPositionTable = new PositionTable(new AlphaAccountList(), new AlphaSecurityList());
AlphaListRule.updatePositionTable = new PositionTable();
// This a simple "Restricted Security" compliance check. If a position exists or is created on the predefined account
// and security combination, then a 'Violation' record will be created. Conversely, if those conditions are removed,
// the corresponding violation will be deleted. The first parameter to opening up a 'Restriction' is the user-defined
// name, which must be unique for this rule. The restriction can specify a severity level and how many overrides are
// required to allow it to trade. Also, a message with replacable parameters can be specified here. When a violation
// is created, this message and the optional data items are combined to create a specific message for the violation. In
// this example, the ticker symbol and account name will be filled when the violation is created.
AlphaListRule.restriction = Restriction.Find("ALPHALIST");
if (AlphaListRule.restriction == null)
{
AlphaListRule.restriction = new Restriction("ALPHALIST", Severity.High, Approval.Officer,
"Security '{0}' is restricted from account {1}.");
}
// The violations need to be synchronized with the current state of the data model when this compliance check is first
// installed . That is, since the programming model is event driven, the state of the violations has to be initialized
// for the incremental rule checking to work. This step will remove any violations that are no longer valid.
foreach (Violation violation in restriction.GetViolations())
{
if (violation.Position.GetQuantity() == 0.0M)
{
violation.Remove();
}
}
// This will complete the task of synchronizing the data model for the compliance rule. If a non-zero position is
// found in the list of restricted securities and accounts, a violation on that position will be generated.
foreach (Position position in AlphaListRule.alphaPositionTable)
{
// Create a position object based on the account, security and long or short position type. Any quantity found for
// that position will trigger a violation. Note that if a violation already exists for this restriction and
// position combination, the description of the violation will be overwritten, but the record will be otherwise
// unchanged.
if (position.GetQuantity() != 0.0M)
{
Violation violation = Violation.Find(restriction, position);
if (violation == null)
{
Violation.Add(restriction, position, position.Security.Symbol, position.Account.Name);
}
}
}
// Flush the command buffer.
CommandBatch.Flush();
// This compliance check is event driven. When an event -- such as adding or deleting an order -- changes the state of
// the data model, these tests will be called to insure that the new state doesn't violate this compliance rule. In
// the case of a simple list rule, the new position will be tested to see if adding or deleting a position results in a
// violation. These statements install the event handlers for tax lots, proposed orders, orders and allocations. For
// example, the method 'TaxLotHandler' will be called when the tax lot table changes.
MarketData.BeginMerge += new EventHandler(BeginMerge);
TaxLot.Changed += new TaxLotEvent(TaxLotHandler);
ProposedOrder.Changed += new ProposedOrderEvent(ProposedOrderHandler);
Order.Changed += new OrderEvent(OrderHandler);
Allocation.Changed += new AllocationEvent(AllocationHandler);
MarketData.EndMerge += new EventHandler(EndMerge);
}