78 lines
3.4 KiB
C#
78 lines
3.4 KiB
C#
using Microsoft.Extensions.Hosting;
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using Microsoft.Extensions.Logging;
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namespace Monitor.Backend.Application;
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/// <summary>保留清理：原始段文件（持续任务与按需测试保留期不同）、各层指标、事件。保留期来自 settings，可以在线修改。</summary>
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public sealed partial class RetentionService : BackgroundService
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{
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private static readonly TimeSpan s_interval = TimeSpan.FromHours(1);
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private readonly IRawStore _raw;
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private readonly IMetricStore _metrics;
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private readonly IEventStore _events;
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private readonly IAuthStore _auth;
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private readonly IHostStore _hosts;
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private readonly SettingsService _settings;
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private readonly LoginRateLimiter _limiter;
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private readonly TimeProvider _time;
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private readonly ILogger<RetentionService> _logger;
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public RetentionService(IRawStore raw, IMetricStore metrics, IEventStore events, IHostStore hosts, IAuthStore auth, SettingsService settings, LoginRateLimiter limiter, TimeProvider time, ILogger<RetentionService> logger)
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{
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_raw = raw;
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_metrics = metrics;
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_events = events;
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_hosts = hosts;
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_auth = auth;
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_settings = settings;
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_limiter = limiter;
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_time = time;
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_logger = logger;
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}
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protected override async Task ExecuteAsync(CancellationToken stoppingToken)
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{
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while (!stoppingToken.IsCancellationRequested)
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{
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try
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{
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await RunOnceAsync(stoppingToken);
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await Task.Delay(s_interval, _time, stoppingToken);
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}
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catch (OperationCanceledException) when (stoppingToken.IsCancellationRequested)
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{
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return;
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}
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catch (Exception ex)
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{
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// 后台循环不能因为一次失败而退出
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LogFailed(ex);
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await Task.Delay(TimeSpan.FromMinutes(5), _time, stoppingToken);
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}
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}
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}
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/// <summary>执行一轮清理（也供测试直接调用）。</summary>
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public async Task RunOnceAsync(CancellationToken ct)
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{
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DateTimeOffset now = _time.GetUtcNow();
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long nowMs = now.ToUnixTimeMilliseconds();
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DateOnly today = DateOnly.FromDateTime(now.UtcDateTime);
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int rawDays = await _settings.GetIntAsync(SettingsService.RawDays, ct);
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int testDays = await _settings.GetIntAsync(SettingsService.TestRawDays, ct);
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await _raw.DeleteExpiredAsync(today.AddDays(-rawDays), today.AddDays(-testDays), ct);
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await _metrics.DeleteOlderThanAsync(MetricLevel.S10, nowMs - (await _settings.GetIntAsync(SettingsService.Metric10sHours, ct) * Steps.Hour), ct);
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await _metrics.DeleteOlderThanAsync(MetricLevel.M1, nowMs - (await _settings.GetIntAsync(SettingsService.Metric1mDays, ct) * Steps.Day), ct);
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await _metrics.DeleteOlderThanAsync(MetricLevel.M5, nowMs - (await _settings.GetIntAsync(SettingsService.Metric5mDays, ct) * Steps.Day), ct);
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await _events.DeleteOlderThanAsync(nowMs - (await _settings.GetIntAsync(SettingsService.EventDays, ct) * Steps.Day), ct);
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await _hosts.DeleteOlderThanAsync(nowMs - (await _settings.GetIntAsync(SettingsService.HostDays, ct) * Steps.Day), ct);
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await _auth.DeleteExpiredSessionsAsync(nowMs, ct);
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_limiter.Prune();
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}
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[LoggerMessage(Level = LogLevel.Error, Message = "retention pass failed")]
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private partial void LogFailed(Exception exception);
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}
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