PluralKit/PluralKit.Bot/Services/PeriodicStatCollector.cs
2020-06-13 23:12:44 +02:00

114 lines
4.5 KiB
C#

using System.Collections.Generic;
using System.Diagnostics;
using System.Threading.Tasks;
using App.Metrics;
using Dapper;
using DSharpPlus;
using DSharpPlus.Entities;
using NodaTime.Extensions;
using PluralKit.Core;
using Serilog;
namespace PluralKit.Bot
{
public class PeriodicStatCollector
{
private DiscordShardedClient _client;
private IMetrics _metrics;
private CpuStatService _cpu;
private IDatabase _db;
private WebhookCacheService _webhookCache;
private DbConnectionCountHolder _countHolder;
private ILogger _logger;
public PeriodicStatCollector(DiscordShardedClient client, IMetrics metrics, ILogger logger, WebhookCacheService webhookCache, DbConnectionCountHolder countHolder, CpuStatService cpu, IDatabase db)
{
_client = client;
_metrics = metrics;
_webhookCache = webhookCache;
_countHolder = countHolder;
_cpu = cpu;
_db = db;
_logger = logger.ForContext<PeriodicStatCollector>();
}
public async Task CollectStats()
{
var stopwatch = new Stopwatch();
stopwatch.Start();
// Aggregate guild/channel stats
var guildCount = 0;
var channelCount = 0;
// No LINQ today, sorry
foreach (var shard in _client.ShardClients.Values)
{
guildCount += shard.Guilds.Count;
foreach (var guild in shard.Guilds.Values)
foreach (var channel in guild.Channels.Values)
if (channel.Type == ChannelType.Text)
channelCount++;
}
_metrics.Measure.Gauge.SetValue(BotMetrics.Guilds, guildCount);
_metrics.Measure.Gauge.SetValue(BotMetrics.Channels, channelCount);
// Aggregate member stats
var usersKnown = new HashSet<ulong>();
var usersOnline = new HashSet<ulong>();
foreach (var shard in _client.ShardClients.Values)
foreach (var guild in shard.Guilds.Values)
foreach (var user in guild.Members.Values)
{
usersKnown.Add(user.Id);
if (user.Presence?.Status == UserStatus.Online)
usersOnline.Add(user.Id);
}
_metrics.Measure.Gauge.SetValue(BotMetrics.MembersTotal, usersKnown.Count);
_metrics.Measure.Gauge.SetValue(BotMetrics.MembersOnline, usersOnline.Count);
// Aggregate DB stats
var counts = await _db.Execute(c => c.QueryFirstAsync<Counts>("select (select count(*) from systems) as systems, (select count(*) from members) as members, (select count(*) from switches) as switches, (select count(*) from messages) as messages"));
_metrics.Measure.Gauge.SetValue(CoreMetrics.SystemCount, counts.Systems);
_metrics.Measure.Gauge.SetValue(CoreMetrics.MemberCount, counts.Members);
_metrics.Measure.Gauge.SetValue(CoreMetrics.SwitchCount, counts.Switches);
_metrics.Measure.Gauge.SetValue(CoreMetrics.MessageCount, counts.Messages);
// Process info
var process = Process.GetCurrentProcess();
_metrics.Measure.Gauge.SetValue(CoreMetrics.ProcessPhysicalMemory, process.WorkingSet64);
_metrics.Measure.Gauge.SetValue(CoreMetrics.ProcessVirtualMemory, process.VirtualMemorySize64);
_metrics.Measure.Gauge.SetValue(CoreMetrics.ProcessPrivateMemory, process.PrivateMemorySize64);
_metrics.Measure.Gauge.SetValue(CoreMetrics.ProcessThreads, process.Threads.Count);
_metrics.Measure.Gauge.SetValue(CoreMetrics.ProcessHandles, process.HandleCount);
_metrics.Measure.Gauge.SetValue(CoreMetrics.CpuUsage, await _cpu.EstimateCpuUsage());
// Database info
_metrics.Measure.Gauge.SetValue(CoreMetrics.DatabaseConnections, _countHolder.ConnectionCount);
// Other shiz
_metrics.Measure.Gauge.SetValue(BotMetrics.WebhookCacheSize, _webhookCache.CacheSize);
stopwatch.Stop();
_logger.Information("Updated metrics in {Time}", stopwatch.ElapsedDuration());
}
public class Counts
{
public int Systems { get; }
public int Members { get; }
public int Switches { get; }
public int Messages { get; }
}
}
}