internal MetricGroup(MetricsCollector collector, string name, bool withoutPrefix, string unit, string description, Func <T1, TMetric> metricFactory = null)
{
_collector = collector;
Name = name;
WithoutPrefix = withoutPrefix;
Unit = unit;
Description = description;
_metricFactory = metricFactory ?? GetDefaultFactory();
}
/// <inheritdoc/>
public Task StopAsync(CancellationToken cancellationToken)
{
_collector?.Shutdown();
_collector = null;
return(Task.CompletedTask);
}
/// <summary>
/// Dumps the state of a <see cref="MetricsCollector" />.
/// </summary>
public async static Task DumpAsync(this MetricsCollector collector, TextWriter textWriter, string[] excludedTags = null)
{
excludedTags ??= Array.Empty <string>();
await textWriter.WriteLineAsync("DefaultTags:");
var defaultTags = collector.DefaultTags;
if (defaultTags.Count > 0)
{
foreach (var t in defaultTags)
{
await textWriter.WriteAsync(" ");
await textWriter.WriteAsync(t.Key);
await textWriter.WriteAsync(" = ");
await textWriter.WriteAsync(t.Value);
await textWriter.WriteLineAsync(string.Empty);
}
}
await textWriter.WriteLineAsync("----");
await textWriter.WriteLineAsync("Endpoints:");
var endpoints = collector.Endpoints;
foreach (var endpoint in endpoints)
{
await textWriter.WriteAsync(" ");
await textWriter.WriteAsync(endpoint.Name);
await textWriter.WriteAsync(": ");
switch (endpoint.Handler)
{
case BosunMetricHandler bosunHandler:
await textWriter.WriteLineAsync(bosunHandler.BaseUri?.AbsoluteUri ?? "null");
break;
case SignalFxMetricHandler signalFxHandler:
await textWriter.WriteLineAsync(signalFxHandler.BaseUri?.AbsoluteUri ?? "null");
break;
case LocalMetricHandler h:
await textWriter.WriteLineAsync("Local");
break;
default:
await textWriter.WriteLineAsync("Unknown");
break;
}
}
await textWriter.WriteLineAsync("----");
await textWriter.WriteLineAsync("Counters:");
var count = 0;
var localHandler = endpoints.Select(x => x.Handler).OfType <LocalMetricHandler>().FirstOrDefault();
if (localHandler != null)
{
foreach (var reading in localHandler.GetReadings(reset: false).OrderBy(r => r.NameWithSuffix))
{
await textWriter.WriteAsync("Name = ");
await textWriter.WriteAsync(reading.Name);
await textWriter.WriteAsync(reading.Suffix);
await textWriter.WriteAsync(", Value = ");
await textWriter.WriteAsync(reading.Value.ToString());
await textWriter.WriteAsync(", Type = ");
await textWriter.WriteAsync(reading.Type.ToString());
await textWriter.WriteAsync(", Tags = [");
var i = 0;
foreach (var tag in reading.Tags)
{
// Skip excluded tags
if (excludedTags.Contains(tag.Key) || collector.DefaultTags.ContainsKey(tag.Key))
{
i++;
continue;
}
await textWriter.WriteAsync(tag.Key);
await textWriter.WriteAsync(" = ");
await textWriter.WriteAsync(tag.Value);
if (i++ < reading.Tags.Count - 1)
{
await textWriter.WriteAsync(", ");
}
}
await textWriter.WriteLineAsync("]");
count++;
}
}
if (count == 0)
{
await textWriter.WriteLineAsync("No readings found yet - this is normal immediately after startup, GIVE IT A MINUTE.");
}
}
/// <inheritdoc/>
public Task StartAsync(CancellationToken cancellationToken)
{
_collector = new MetricsCollector(_options.Value);
return(Task.CompletedTask);
}