public async Task <IEnumerable <LoadMetric> > Aggregate(IReliableStateManager stateManager, CancellationToken cancellationToken)
{
Dictionary <string, double> totals = new Dictionary <string, double>();
await stateManager.ForeachAsync(
cancellationToken,
async item =>
{
cancellationToken.ThrowIfCancellationRequested();
IMetricReliableCollection metricCollection = item as IMetricReliableCollection;
if (metricCollection != null)
{
using (ITransaction tx = stateManager.CreateTransaction())
{
IEnumerable <DecimalLoadMetric> metrics = await metricCollection.GetLoadMetricsAsync(tx, cancellationToken);
foreach (DecimalLoadMetric metric in metrics)
{
if (totals.ContainsKey(metric.Name))
{
totals[metric.Name] += metric.Value;
}
else
{
totals[metric.Name] = metric.Value;
}
}
}
}
});
return(totals.Select(x => new LoadMetric(x.Key, (int)Math.Round(x.Value))));
}