public DisplayMetricChart TryGetChart(string chartName)
{
string me = whoami();
DisplayMetricChart chart = _metricManager.GetChart(chartName);
if (chart != null)
{
MembershipHelper.CheckMembership(chart.GroupID, me);
return(chart);
}
else
{
//check chart name format
if (string.IsNullOrEmpty(chartName))
{
return(null);
}
string[] split = chartName.Split('_');
string group = split[0];
string category = split.Length > 1 ? split[1] : null;
string counter = split.Length > 2 ? split[2] : null;
string instance = split.Length > 3 ? split[3] : null;
MembershipHelper.CheckMembership(group, me);
//Try create chart if not exist
List <MetricDataSet> datasets = _metricManager.QueryDataSet(group, category, counter, instance);
if (datasets.Count == 0)
{
return(null);
}
chart = _metricManager.CreateChart(chartName, group, chartName);
foreach (var dataset in datasets)
{
_metricManager.AddDataSet(chartName, dataset.Id, dataset.Instance, "line");
}
chart = _metricManager.GetChart(chartName);
}
return(chart);
}
