public StatsdService(IList<IBackend> backends, StatsdServiceConfig config = null)
{
_backends = backends;
_handlers.Add(MetricTypeContants.Counter, HandleCounter);
_handlers.Add(MetricTypeContants.Gauge, HandleGauge);
_handlers.Add(MetricTypeContants.Set, HandleSet);
_handlers.Add(MetricTypeContants.Timer, HandleTimer);
_activeSnapshot = new ActiveSnapshot();
_config = config ?? new StatsdServiceConfig();
}
private IMetricsSnapshot Snapshot(ref ActiveSnapshot activeSnapshot)
{
activeSnapshot.AddGauge(string.Format(StatsdServiceStatConstants.ServiceUptimeFormat, _config.ServiceStatsPrefix), (long)(DateTimeOffset.Now - _serviceStartTimestamp).TotalMilliseconds);
var newSnapshot = new StaticSnapshot();
newSnapshot.Counters = new Dictionary<string, long>(activeSnapshot.Counters);
newSnapshot.Gauges = new Dictionary<string, long>(activeSnapshot.Gauges);
newSnapshot.Sets = new Dictionary<string, SortedSet<long>>(activeSnapshot.Sets);
newSnapshot.Timers = new Dictionary<string, List<long>>(activeSnapshot.Timers);
if (_config.ClearKeys)
{
activeSnapshot.Counters.Clear();
activeSnapshot.Sets.Clear();
activeSnapshot.Timers.Clear();
activeSnapshot.TimerCounters.Clear();
// TODO: does DeleteGauges trump ClearKeys?
activeSnapshot.Gauges.Clear();
}
else
{
foreach (var key in _activeSnapshot.Counters.Keys)
{
activeSnapshot.Counters[key] = 0;
}
if (_config.DeleteGauges)
{
foreach (var key in activeSnapshot.Gauges.Keys)
{
activeSnapshot.Gauges[key] = 0;
}
}
foreach (var key in activeSnapshot.Sets.Keys)
{
activeSnapshot.Sets[key].Clear();
}
foreach (var key in activeSnapshot.Timers.Keys)
{
activeSnapshot.Timers[key].Clear();
activeSnapshot.TimerCounters[key] = 0;
}
}
return newSnapshot;
}