Exemplo n.º 1
0
        public BatchStatistics CalculateBatchStatistics(BindingList<BatchIntervalMarked> batchIntervals, CaptureState captureState, BatchType batchType)
        {
            decimal batchIntervalsMean = 0;
            decimal batchIntervalsTrimmedMean = 0;

            // Trim zero packets from the batch interval
            BindingList<BatchIntervalMarked> batchIntervalsTrimmed = new BindingList<BatchIntervalMarked>();
            foreach (BatchIntervalMarked bim in batchIntervals)
            {
                if (bim.PacketCount > AnalysisConfiguration.HistogramBinSize)
                {
                    batchIntervalsTrimmed.Add(bim);
                }
            }

            // Calculate statistics for the batch
            BatchStatistics bs = new BatchStatistics();

            if (AnalysisConfiguration.TrimSmallPackets)
            {
                BaseStatistics stats = new BaseStatistics(batchIntervalsTrimmed);
                bs.IntervalCountTrimmed = stats.Count;
                bs.PacketCountMaximum = stats.Maximum;
                bs.PacketCountMinimum = stats.Minimum;
                bs.PacketCountMean = stats.Mean;
                bs.PacketCountStandardDeviation = stats.StdDev;

                // Calculate both means for updating the capture batch intervals
                batchIntervalsTrimmedMean = stats.Mean;
                batchIntervalsMean = Convert.ToDecimal((from t in batchIntervals select t.PacketCount).Average());

                // Get both counts for the batch
                bs.IntervalCountTrimmed = stats.Count < 0 ? 0 : stats.Count;
                bs.IntervalCount = batchIntervals.Count < 0 ? 0 : batchIntervals.Count;
            }
            else
            {
                BaseStatistics stats = new BaseStatistics(batchIntervals);
                bs.IntervalCount = stats.Count;
                bs.PacketCountMaximum = stats.Maximum;
                bs.PacketCountMinimum = stats.Minimum;
                bs.PacketCountMean = stats.Mean;
                bs.PacketCountStandardDeviation = stats.StdDev;

                // Calculate both means for updating the capture batch intervals
                batchIntervalsMean = bs.PacketCountMean;
                batchIntervalsTrimmedMean = Convert.ToDecimal((from t in batchIntervalsTrimmed select t.PacketCount).Average());

                // Get both counts for the batch
                bs.IntervalCount = stats.Count < 0 ? 0 : stats.Count;
                bs.IntervalCountTrimmed = batchIntervalsTrimmed.Count < 0 ? 0 : batchIntervalsTrimmed.Count;
            }

            // Update the batch mean - only for single batches, not cumulative batches
            CurrentCaptureFile captureFile = new CurrentCaptureFile();
            ProcessCapturePackets pcp = new ProcessCapturePackets();
            captureFile = pcp.GetCurrentCaptureFile(_CaptureFileName);
            int captureBatchId = captureFile.CaptureBatchId;

            if (batchType == BatchType.Single && captureBatchId != 0)
            {
                try
                {
                    //ProcessCapturePackets pcp = new ProcessCapturePackets();
                    //if (!pcp.UpdateBatchMean(Convert.ToInt32(captureBatchId), bs.PacketCountMean))
                    if (!pcp.UpdateBatchMean(Convert.ToInt32(captureBatchId), batchIntervalsMean, batchIntervalsTrimmedMean))
                    {
                        throw new Exception("Error updating batch mean for CaptureBatchId " + captureBatchId);
                    }
                }
                catch (Exception ex)
                {
                    throw new Exception("Error updating batch mean for CaptureBatchId " + captureBatchId + ": " + ex.Message);
                }
            }

            // Save the statistics to the database for display on the Analysis tab (save to DisplayStatistics table)
            SaveDisplayStatistics(bs, captureBatchId, captureState, batchType, true);

            return bs;
        }