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using System;
using System.Collections.Generic;
using System.Windows.Forms;
using System.Windows.Forms.DataVisualization.Charting;
using System.Linq;
using JetBrains.Annotations;
using Kaleida.ServiceMonitor.Model.Statistics;
namespace Kaleida.ServiceMonitor.UI
{
public partial class OperationStatisticsControl : UserControl
{
private bool updatingUI;
private const string NullIndicator = "-";
private readonly ProcessingStatistics statistics;
public OperationStatisticsControl(ProcessingStatistics statistics)
{
this.statistics = statistics;
InitializeComponent();
UpdateControlsBasedOnLogarithmicAxisSetting();
UpdateUI();
}
[NotNull]
public ProcessingStatistics Statistics
{
get {return statistics;}
}
public void UpdateUI()
{
if (updatingUI)
return;
lock (this)
{
updatingUI = true;
SuspendLayout();
tbDescription.Text = statistics.Description;
tbRequestCount.Text = statistics.ProcessedCount.ToString("0");
tbSuccessCount.Text = statistics.SuccessCount.ToString("0");
tbFailureCount.Text = statistics.FailureCount.ToString("0");
tbSuccessRate.Text = GetSuccessRateString();
tbMeanRequestMs.Text = GetMillisecondText(statistics.MeanProcessingTime);
tbMinRequestMs.Text = GetMillisecondText(statistics.MinimumProcessingTime);
tbMaxRequestMs.Text = GetMillisecondText(statistics.MaximumProcessingTime);
tbRecentRequestMs.Text = GetMillisecondText(statistics.MostRecentProcessingTime);
var percentiles = statistics.GetResponseTimePercentiles(new[] {90m, 99m, 99.9m, 99.99m});
tb1Nine.Text = GetMillisecondText(percentiles[0].Value);
tb2Nines.Text = GetMillisecondText(percentiles[1].Value);
tb3Nines.Text = GetMillisecondText(percentiles[2].Value);
tb4Nines.Text = GetMillisecondText(percentiles[3].Value);
var points = statistics.GetResponseTimeDistribution();
UpdateChartUI(points);
ResumeLayout();
updatingUI = false;
}
}
private string GetSuccessRateString()
{
return statistics.ProcessedCount == 0
? NullIndicator
: (((double)statistics.SuccessCount)/statistics.ProcessedCount).ToString("0.000%");
}
private static string GetMillisecondText(TimeSpan? value)
{
return value == null ? NullIndicator : value.Value.TotalMilliseconds.ToString("0");
}
private void UpdateChartUI(IList<DistributionPoint> points)
{
chtDistribution.Series.Clear();
var series = new Series
{
IsXValueIndexed = false,
ChartType = SeriesChartType.Column,
MarkerSize = 3,
MarkerStyle = MarkerStyle.None,
};
foreach (var point in points)
{
var dataPoint = new DataPoint(point.TimeMs, point.Count);
series.Points.Add(dataPoint);
}
chtDistribution.Series.Add(series);
var chartArea = chtDistribution.ChartAreas[0];
chartArea.AxisX.IsLogarithmic = chkLogXAxis.Checked && points.Any();
chartArea.AxisX.LogarithmBase = (double) nudLogarithmBase.Value;
chartArea.RecalculateAxesScale();
}
private void chkLogXAxis_CheckedChanged(object sender, EventArgs e)
{
UpdateControlsBasedOnLogarithmicAxisSetting();
}
private void UpdateControlsBasedOnLogarithmicAxisSetting()
{
nudLogarithmBase.Enabled = chkLogXAxis.Checked;
}
}
}
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Stuart Wheelwright is the Principal Architect and Software Developer at
BlackJet Software Ltd.
He has over 16 years commercial experience producing robust, maintainable, web-based solutions and bespoke systems for Microsoft platforms.
His latest project is
Shopping UK, an elegantly simple shopping list for iPhone.