public void ProcessRequest(RequestBase baseRequest, HandlerResponse response)
{
if (baseRequest == null)
{
throw new ArgumentNullException(nameof(baseRequest));
}
var request = baseRequest as StressedCurveGenRequest;
if (request == null)
{
throw new InvalidCastException(
$"{typeof(RequestBase).Name} is not a {typeof(StressedCurveGenRequest).Name}");
}
// check for workflow cancellation
if (Cancelled)
{
throw new OperationCanceledException(CancelReason);
}
DateTime lastStatusPublishedAt = DateTime.Now;
CurveSelection[] curveSelectors = request.CurveSelector ?? new List <CurveSelection>().ToArray();
#region Load stress rules
//find the uniques namespaces
var uniquesNameSpaces = new List <string>();
foreach (CurveSelection curveSelector in curveSelectors)
{
if (!uniquesNameSpaces.Contains(curveSelector.NameSpace))
{
uniquesNameSpaces.Add(curveSelector.NameSpace);
}
}
var cachedStressRules = new Dictionary <string, List <CachedStressRule> >();
{
IExpression queryExpr = Expr.IsEQU(EnvironmentProp.NameSpace, uniquesNameSpaces[0]);//TODO only does the first namespace....
List <StressRule> storedStressRules = Context.Cache.LoadObjects <StressRule>(queryExpr);
foreach (StressRule storedStressRule in storedStressRules)
{
if ((storedStressRule.Disabled) || (storedStressRule.StressId == null))
{
continue;
}
string key = storedStressRule.StressId.ToLower();
List <CachedStressRule> rules;
if (!cachedStressRules.TryGetValue(key, out rules))
{
rules = new List <CachedStressRule>();
cachedStressRules[key] = rules;
}
rules.Add(new CachedStressRule(storedStressRule));
rules.Sort();
}
}
#endregion
response.ItemCount = curveSelectors.Length * cachedStressRules.Count;
// iterate selected base curves
foreach (CurveSelection curveSelector in curveSelectors)
{
// check for workflow cancellation
if (Cancelled)
{
throw new OperationCanceledException(CancelReason);
}
// publish 'intermediate' in-progress result (throttled)
if ((DateTime.Now - lastStatusPublishedAt) > TimeSpan.FromSeconds(5))
{
lastStatusPublishedAt = DateTime.Now;
response.Status = RequestStatusEnum.InProgress;
Context.Cache.SaveObject(response);
}
string nameSpace = curveSelector.NameSpace;
string inputMarketName = curveSelector.MarketName;
var marketDate = curveSelector.MarketDate;
if (marketDate != null && marketDate != DateTime.MinValue)
{
inputMarketName += "." + ((DateTime)marketDate).ToString(CurveProp.MarketDateFormat);
}
string inputCurveName = curveSelector.CurveName;
string inputCurveType = curveSelector.CurveType;
Context.Logger.LogDebug("Building stressed curve(s): {0}.{1}.{2}", inputMarketName, inputCurveType, inputCurveName);
#region Load base curve
var curveGenProps = new NamedValueSet();
curveGenProps.Set(CurveProp.BaseDate, request.BaseDate);
IPricingStructureIdentifier baseCurveId =
PricingStructureIdentifier.CreateMarketCurveIdentifier(curveGenProps, inputMarketName, null, inputCurveType, inputCurveName, null);
var baseCurveUniqueId = baseCurveId.Properties.GetValue <string>(CurveProp.UniqueIdentifier, true);
ICoreItem baseCurveItem = LoadAndCheckMarketItem(Context.Cache, nameSpace, baseCurveUniqueId);
var stressNameProp = baseCurveItem.AppProps.GetValue <string>(CurveProp.StressName, null);
if (stressNameProp != null)
{
throw new ApplicationException("The Market with name '" + baseCurveUniqueId + "' is NOT a base curve! (Stress name is not null)");
}
var baseCurveFpml = (Market)baseCurveItem.Data;
var baseCurveType = PropertyHelper.ExtractPricingStructureType(baseCurveItem.AppProps);
#endregion
#region Load the reference curves - if required
string fxCurveName = null, refCurveName = null, quoteCurveName = null;
NamedValueSet fxProperties = null, refProperties = null, quoteProperties = null;
Market fxMarket = null, refMarket = null, quoteMarket = null;
if (baseCurveType == PricingStructureTypeEnum.RateBasisCurve ||
baseCurveType == PricingStructureTypeEnum.RateXccyCurve)
{
// rate basis curves require a reference curve
refCurveName = baseCurveItem.AppProps.GetValue <string>(CurveProp.ReferenceCurveUniqueId, true);
// load the reference curve
var refCurveItem = LoadAndCheckMarketItem(Context.Cache, nameSpace, refCurveName);
refMarket = (Market)refCurveItem.Data;
refProperties = refCurveItem.AppProps;
}
if (baseCurveType == PricingStructureTypeEnum.RateXccyCurve)
{
// rate basis curves require an fx curve
fxCurveName = baseCurveItem.AppProps.GetValue <string>(CurveProp.ReferenceFxCurveUniqueId, true);
// load the reference curve
var fxCurveItem = LoadAndCheckMarketItem(Context.Cache, nameSpace, fxCurveName);
fxMarket = (Market)fxCurveItem.Data;
fxProperties = fxCurveItem.AppProps;
// rate basis curves require a reference curve
quoteCurveName = baseCurveItem.AppProps.GetValue <string>(CurveProp.ReferenceCurrency2CurveId, true);
// load the reference curve
var quoteCurveItem = LoadAndCheckMarketItem(Context.Cache, nameSpace, quoteCurveName);
quoteMarket = (Market)quoteCurveItem.Data;
quoteProperties = quoteCurveItem.AppProps;
}
#endregion
// process stress rules
foreach (var kvp in cachedStressRules)
{
CachedStressRule stressRule = kvp.Value.FirstOrDefault(item => (item.FilterExpr == null) || (Expr.CastTo(item.FilterExpr.Evaluate(baseCurveItem.AppProps), false)));
// find stress rule that applies
if (stressRule == null)
{
// this stress does not apply to this base curve
Context.Logger.LogWarning("Stress '{0}' does not apply to base curve '{1}'!", kvp.Key, baseCurveUniqueId);
response.IncrementItemsPassed();
continue;
}
// apply the stress rule
//_Context.Logger.LogDebug("Applying stress '{0}' (rule {1}) to base curve '{2}'", stressRule.StressId, stressRule.RuleId, baseCurveUniqueId);
var stressDefProps = new NamedValueSet(baseCurveItem.AppProps, curveGenProps);
stressDefProps.Set("Identifier", null);//THis is done for backward compatability eith the old ratecurves.
stressDefProps.Set(CurveProp.BaseCurveType, baseCurveType);
IPricingStructureIdentifier stressCurveId = PricingStructureIdentifier.CreateMarketCurveIdentifier(
stressDefProps, inputMarketName, null, baseCurveType.ToString(), inputCurveName, stressRule.StressId);
NamedValueSet stressCurveProps = stressCurveId.Properties;
var stressCurveName = stressCurveProps.GetValue <string>(CurveProp.UniqueIdentifier, true);
// from here on a curve will be published (with error details included)
var stressCurve = new Market(); // empty
try
{
// clone the base curve and adjust the market quotes
var ps = BinarySerializerHelper.Clone(baseCurveFpml.Items[0]);
PricingStructureValuation psv = ApplyStress(stressRule, baseCurveFpml.Items1[0]);
// hack - supply base date
psv.baseDate = new IdentifiedDate {
Value = request.BaseDate
};
Triplet <PricingStructure, PricingStructureValuation, NamedValueSet> refCurveFpmlTriplet = null;
if (baseCurveType == PricingStructureTypeEnum.RateBasisCurve ||
baseCurveType == PricingStructureTypeEnum.RateXccyCurve)
{
var psRef = BinarySerializerHelper.Clone(refMarket.Items[0]);
//var psvRef = BinarySerializerHelper.Clone<PricingStructureValuation>(refcurveFpml.Items1[0]);
var psvRef = ApplyStress(stressRule, refMarket.Items1[0]);
refCurveFpmlTriplet =
new Triplet <PricingStructure, PricingStructureValuation, NamedValueSet>(
psRef, psvRef, refProperties);
}
IPricingStructure ips;
switch (baseCurveType)
{
case PricingStructureTypeEnum.RateBasisCurve:
stressCurveProps.Set(CurveProp.ReferenceCurveUniqueId, refCurveName);
var basisCurveFpmlTriplet =
new Triplet <PricingStructure, PricingStructureValuation, NamedValueSet>(
ps, psv, stressCurveProps);
//create and set the pricingstructure
ips = CurveLoader.LoadInterestRateCurve(Context.Logger, Context.Cache, nameSpace, refCurveFpmlTriplet, basisCurveFpmlTriplet);
//Creator.Create(refCurveFpmlTriplet, basisCurveFpmlTriplet);
break;
case PricingStructureTypeEnum.RateXccyCurve:
stressCurveProps.Set(CurveProp.ReferenceCurveUniqueId, refCurveName);
stressCurveProps.Set(CurveProp.ReferenceFxCurveUniqueId, fxCurveName);
stressCurveProps.Set(CurveProp.ReferenceCurrency2CurveId, quoteCurveName);
var xccyCurveFpmlTriplet =
new Triplet <PricingStructure, PricingStructureValuation, NamedValueSet>(ps, psv,
stressCurveProps);
//Format the ref curve data and call the pricing structure helper.
var psvFx = ApplyStress(stressRule, fxMarket.Items1[0]);
var fxCurveFpmlTriplet
= new Triplet <PricingStructure, PricingStructureValuation, NamedValueSet>(
fxMarket.Items[0],
psvFx, fxProperties);
var psvRef = ApplyStress(stressRule, quoteMarket.Items1[0]);
var quoteCurveFpmlTriplet
= new Triplet <PricingStructure, PricingStructureValuation, NamedValueSet>(
quoteMarket.Items[0],
psvRef, quoteProperties);
//create and set the pricingstructure
ips = CurveLoader.LoadInterestRateCurve(Context.Logger, Context.Cache, nameSpace, refCurveFpmlTriplet, fxCurveFpmlTriplet, quoteCurveFpmlTriplet,
xccyCurveFpmlTriplet);
//Creator.Create(refCurveFpmlTriplet, fxCurveFpmlTriplet, quoteCurveFpmlTriplet, xccyCurveFpmlTriplet);
break;
default:
ips = CurveLoader.LoadCurve(Context.Logger, Context.Cache,
nameSpace, new Pair <PricingStructure, PricingStructureValuation>(ps, psv),
stressCurveProps);
//Creator.Create( new Pair<PricingStructure, PricingStructureValuation>(ps, psv), stressCurveProps);
break;
}
var identifier = ips.GetPricingStructureId().UniqueIdentifier;
// retrieve curve
stressCurve = PricingStructureHelper.CreateMarketFromFpML(
identifier,
ips.GetFpMLData());
// curve done
response.IncrementItemsPassed();
}
catch (Exception innerExcp)
{
response.IncrementItemsFailed();
Context.Logger.Log(innerExcp);
stressCurveProps.Set(WFPropName.ExcpName, WFHelper.GetExcpName(innerExcp));
stressCurveProps.Set(WFPropName.ExcpText, WFHelper.GetExcpText(innerExcp));
}
// save stressed curve with same lifetime as base curve
stressCurveProps.Set(EnvironmentProp.NameSpace, nameSpace);
Context.Cache.SaveObject(stressCurve, nameSpace + "." + stressCurveName, stressCurveProps, true, baseCurveItem.Expires);
} // foreach stress rule
} // foreach base curve
// success
response.Status = RequestStatusEnum.Completed;
}
private static PricingStructureValuation ApplyStress(CachedStressRule stressRule, PricingStructureValuation psvInput)
{
string marketQuote = AssetMeasureScheme.GetEnumString(AssetMeasureEnum.MarketQuote);
string decimalRate = PriceQuoteUnitsScheme.GetEnumString(PriceQuoteUnitsEnum.DecimalRate);
var psv = BinarySerializerHelper.Clone(psvInput);
// extract the market quotes from the cloned base curve
QuotedAssetSet curveDefinition;
if (psv is YieldCurveValuation yieldCurveValuation)
{
curveDefinition = yieldCurveValuation.inputs;
}
else
{
if (psv is FxCurveValuation curveValuation)
{
curveDefinition = new QuotedAssetSet
{
instrumentSet = curveValuation.spotRate.instrumentSet,
assetQuote = curveValuation.spotRate.assetQuote
};
}
else
{
throw new NotSupportedException("Unsupported PricingStructureValuation type: " +
psv.GetType().Name);
}
}
// stress the market quotes
foreach (BasicAssetValuation asset in curveDefinition.assetQuote)
{
var stressDefQuotes = new List <BasicQuotation>();
foreach (BasicQuotation quote in asset.quote)
{
if (quote.measureType.Value.Equals(marketQuote) &&
quote.quoteUnits.Value.Equals(decimalRate))
{
var exprProps = new NamedValueSet(new NamedValue("MarketQuote", quote.value));
quote.valueSpecified = true;
quote.value = Convert.ToDecimal(stressRule.UpdateExpr.Evaluate(exprProps));
}
quote.informationSource = null;
quote.timeSpecified = false;
quote.valuationDateSpecified = false;
stressDefQuotes.Add(quote);
}
asset.quote = stressDefQuotes.ToArray();
}
// replace the market quotes in the cloned base curve with the stressed values
if (psv is YieldCurveValuation valuation)
{
valuation.inputs = curveDefinition;
valuation.discountFactorCurve = null;
valuation.zeroCurve = null;
}
else
{
((FxCurveValuation)psv).spotRate
= new FxRateSet
{
instrumentSet = curveDefinition.instrumentSet,
assetQuote = curveDefinition.assetQuote
};
}
return(psv);
}
