public static TOutput AggregateResults <TOutput, TItem>(FacadeMethodInfo <TOutput, TItem> facade, SubMethodRunState[] subMethodRunStates) where TOutput : class, IBasicOutput <TItem>, new()
{
#region Final aggregation
var succeededCount = (from mi in subMethodRunStates where mi.Succeeded select mi).Count();
var subResults = (from mi in subMethodRunStates select mi.Result).ToArray();
bool canAggregate = facade.AggregationFailOption == AggregationFailOption.FailNever ||
facade.AggregationFailOption == AggregationFailOption.FailOnAll && succeededCount > 0 ||
facade.AggregationFailOption == AggregationFailOption.FailOnAny && succeededCount == subMethodRunStates.Length;
if (canAggregate)
{
var outputMainItem = facade.Aggregate(subResults);
if (facade.IsValidResult(outputMainItem))
{
Local.Admin.AddNewLog(TraceEventType.Information, BrokerContext.Current.WebMethodMessageName, TextMessages.Succeeded, null, null);
var output = new TOutput();
output.SetMainItem(outputMainItem);
if (succeededCount == subMethodRunStates.Length)
{
output.StandardRetur = StandardReturType.OK();
}
else
{
var failedSubMethods = subMethodRunStates.Where(smi => !smi.Succeeded).Select(smi => smi.SubMethodInfo);
var failedSubMethodsByReason = failedSubMethods.GroupBy(smi => smi.PossibleErrorReason());
var failuresAndReasons = failedSubMethodsByReason.ToDictionary(grp => grp.Key, grp => grp.Select(smi => smi.InputToString()));
output.StandardRetur = StandardReturType.PartialSuccess(failuresAndReasons);
}
return(output);
}
else
{
string xml = Strings.SerializeObject(outputMainItem);
Local.Admin.AddNewLog(TraceEventType.Error, BrokerContext.Current.WebMethodMessageName, TextMessages.ResultGatheringFailed, typeof(TOutput).ToString(), xml);
return(new TOutput()
{
StandardRetur = StandardReturType.UnspecifiedError("Aggregation failed")
});
}
}
else
{
// TODO: Is it possible to put details why each item has failed?
return(new TOutput()
{
StandardRetur = StandardReturType.Create(HttpErrorCode.DATASOURCE_UNAVAILABLE)
});
}
#endregion
}
public TOutput Aggregate <TOutput>(Element[] elements)
where TOutput : IBasicOutput <TOutputElement[]>, new()
{
// Set output item - only copy succeeded elements
var ret = new TOutput();
ret.Item = elements.Select(
s => this.IsElementSucceeded(s) ? s.Output : default(TOutputElement)
).ToArray();
// Set standard return
var failed = elements.Where(s => !IsElementSucceeded(s)).ToArray();
var succeededCount = elements.Length - failed.Length;
if (succeededCount == 0)
{
ret.StandardRetur = StandardReturType.Create(HttpErrorCode.DATASOURCE_UNAVAILABLE);
}
else if (succeededCount < elements.Length)
{
var failuresAndReasons = failed
.GroupBy(s => s.PossibleErrorReason)
.ToDictionary(
g => g.Key,
g => g.ToArray()
.Select(s => string.Format("{0}", s.Input))
);
ret.StandardRetur = StandardReturType.PartialSuccess(failuresAndReasons);
}
else
{
ret.StandardRetur = StandardReturType.OK();
}
// final return
return(ret);
}
public TOutput Run <TOutput>(IEnumerable <TInterface> providers) where TOutput : IBasicOutput <TSingleOutputItem[]>, new()
{
foreach (var prov in providers)
{
var currentStates = States
.Where(s => !IsSucceededStatus(s)).ToArray();
if (currentStates.Length == 0)
{
break;
}
var currentInput = currentStates
.Select(kvp => kvp.Input).ToArray();
try
{
var currentOutput = Run(prov, currentInput);
var currentSucceededStates = new List <Status>();
for (int i = 0; i < currentStates.Length; i++)
{
currentStates[i].Output = currentOutput[i];
if (IsSucceededStatus(currentStates[i]))
{
currentSucceededStates.Add(currentStates[i]);
}
}
if (prov is IExternalDataProvider)
{
InvokeUpdateMethod(
currentSucceededStates.Select(s => s.Input).ToArray(),
currentSucceededStates.Select(s => s.Output).ToArray()
);
}
}
catch (Exception ex)
{
Local.Admin.LogException(ex);
}
}
// Now create the result
var failed = States.Where(s => !IsSucceededStatus(s)).ToArray();
var result = States.Select(s => s.Output).ToArray();
var succeededCount = States.Length - failed.Length;
var ret = new TOutput();
ret.SetMainItem(result);
if (succeededCount == 0)
{
ret.StandardRetur = StandardReturType.Create(HttpErrorCode.DATASOURCE_UNAVAILABLE);
}
else if (succeededCount < States.Length)
{
var failuresAndReasons = failed
.GroupBy(s => s.PossibleErrorReason)
.ToDictionary(
g => g.Key,
g => g.ToArray()
.Select(s => string.Format("{0}", s.Input))
);
ret.StandardRetur = StandardReturType.PartialSuccess(failuresAndReasons);
}
else
{
ret.StandardRetur = StandardReturType.OK();
}
return(ret);
}
