private Task DetectSuspiciousTrades(CancellationToken token)
{
Console.WriteLine("Monitoring suspicious trade activity");
Console.WriteLine();
while (!token.IsCancellationRequested)
{
if (QueuedTrades.TryDequeue(out var newTrade))
{
var flaggedTrades = ProcessedTrades
.Where(processedTrade => _validator.IsSuspicious(processedTrade, newTrade))
.ToList();
flaggedTrades.ForEach(flaggedTrade =>
{
var flagged = new FlaggedTrades()
{
Match = flaggedTrade,
Trade = newTrade
};
FlaggedTrades.Add(flagged);
_logger.Log(flagged);
});
ProcessedTrades.Enqueue(newTrade);
}
}
return(Task.CompletedTask);
}
private Task RetentionPolicy(CancellationToken token)
{
Console.WriteLine("Applying trades retention policy");
Console.WriteLine();
while (!token.IsCancellationRequested)
{
if (ProcessedTrades.TryPeek(out var trade))
{
var latestTrade = ProcessedTrades.Last();
if (latestTrade.AsAt.Subtract(trade.AsAt).TotalSeconds > _settings.Get().RetentionPeriod)
{
Console.WriteLine($"Throwing away deal #{trade.Id}");
ProcessedTrades.TryDequeue(out _);
}
}
}
return(Task.CompletedTask);
}
