69 lines
2.8 KiB
C#
69 lines
2.8 KiB
C#
using System.Diagnostics;
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using Foxnouns.Backend.Database;
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using Microsoft.EntityFrameworkCore;
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using NodaTime;
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using Prometheus;
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namespace Foxnouns.Backend.Services;
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public class MetricsCollectionService(ILogger logger, IServiceProvider services, IClock clock)
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{
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private readonly ILogger _logger = logger.ForContext<MetricsCollectionService>();
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private static readonly Duration Month = Duration.FromDays(30);
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private static readonly Duration Week = Duration.FromDays(7);
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private static readonly Duration Day = Duration.FromDays(1);
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public async Task CollectMetricsAsync(CancellationToken ct = default)
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{
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var timer = FoxnounsMetrics.MetricsCollectionTime.NewTimer();
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var now = clock.GetCurrentInstant();
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await using var scope = services.CreateAsyncScope();
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await using var db = scope.ServiceProvider.GetRequiredService<DatabaseContext>();
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var users = await db.Users.Where(u => !u.Deleted).Select(u => u.LastActive).ToListAsync(ct);
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FoxnounsMetrics.UsersCount.Set(users.Count);
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FoxnounsMetrics.UsersActiveMonthCount.Set(users.Count(i => i > now - Month));
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FoxnounsMetrics.UsersActiveWeekCount.Set(users.Count(i => i > now - Week));
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FoxnounsMetrics.UsersActiveDayCount.Set(users.Count(i => i > now - Day));
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var memberCount = await db
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.Members.Include(m => m.User)
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.Where(m => !m.Unlisted && !m.User.ListHidden && !m.User.Deleted)
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.CountAsync(ct);
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FoxnounsMetrics.MemberCount.Set(memberCount);
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var process = Process.GetCurrentProcess();
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FoxnounsMetrics.ProcessPhysicalMemory.Set(process.WorkingSet64);
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FoxnounsMetrics.ProcessVirtualMemory.Set(process.VirtualMemorySize64);
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FoxnounsMetrics.ProcessPrivateMemory.Set(process.PrivateMemorySize64);
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FoxnounsMetrics.ProcessThreads.Set(process.Threads.Count);
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FoxnounsMetrics.ProcessHandles.Set(process.HandleCount);
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_logger.Information(
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"Collected metrics in {DurationMilliseconds} ms",
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timer.ObserveDuration().TotalMilliseconds
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);
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}
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}
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public class BackgroundMetricsCollectionService(
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ILogger logger,
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MetricsCollectionService metricsCollectionService
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) : BackgroundService
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{
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private readonly ILogger _logger = logger.ForContext<BackgroundMetricsCollectionService>();
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protected override async Task ExecuteAsync(CancellationToken ct)
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{
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_logger.Information("Metrics are disabled, periodically collecting metrics manually");
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using var timer = new PeriodicTimer(TimeSpan.FromMinutes(1));
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while (await timer.WaitForNextTickAsync(ct))
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{
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_logger.Debug("Collecting metrics manually");
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await metricsCollectionService.CollectMetricsAsync(ct);
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}
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}
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}
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