Joseph Doherty
1a2856526a
Comments described the *history* of how the code arrived (phase numbers, wave IDs, review IDs, dated TODOs) instead of what it does today. That scaffolding rotted as the codebase evolved. Cleaned 60 source files + .gitignore; behaviour unchanged (387/387 tests still pass). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
58 lines
2.4 KiB
C#
58 lines
2.4 KiB
C#
namespace Mbproxy;
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/// <summary>
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/// Service-wide counters for the mbproxy host. Tracks reload accept/reject counts and
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/// timestamps so the status page can surface them without coupling to the reconciler.
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///
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/// <para>Constructed once at DI startup and shared as a singleton. All writes are via
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/// dedicated methods that use <see cref="Interlocked"/> so reads from the status page
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/// are always coherent without locking.</para>
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/// </summary>
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public sealed class ServiceCounters
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{
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// LastReloadUtc: stored as ticks-since-epoch via Interlocked.Exchange.
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// 0 = "never reloaded". DateTimeOffset.MinValue.UtcTicks works as the sentinel
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// but 0 is simpler. DateTimeOffset.UtcNow.UtcTicks is always > 0 after 1970.
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private long _lastReloadUtcTicks; // 0 = never; Interlocked
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private int _reloadAppliedCount; // Interlocked
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private int _reloadRejectedCount; // Interlocked
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/// <summary>Instant at which this service instance was constructed (service start proxy).</summary>
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public DateTimeOffset StartedAtUtc { get; } = DateTimeOffset.UtcNow;
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/// <summary>
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/// UTC timestamp of the last successfully applied hot-reload, or <c>null</c> if no
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/// reload has been accepted since the service started.
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/// </summary>
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public DateTimeOffset? LastReloadUtc
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{
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get
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{
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long ticks = Interlocked.Read(ref _lastReloadUtcTicks);
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return ticks == 0 ? null : new DateTimeOffset(ticks, TimeSpan.Zero);
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}
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}
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/// <summary>Total number of configuration reloads accepted since service start.</summary>
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public int ReloadAppliedCount
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=> Interlocked.CompareExchange(ref _reloadAppliedCount, 0, 0);
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/// <summary>Total number of configuration reloads rejected since service start.</summary>
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public int ReloadRejectedCount
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=> Interlocked.CompareExchange(ref _reloadRejectedCount, 0, 0);
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/// <summary>
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/// Records one accepted reload. Bumps <see cref="ReloadAppliedCount"/> and updates
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/// <see cref="LastReloadUtc"/>.
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/// </summary>
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public void RecordReloadApplied(DateTimeOffset timestamp)
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{
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Interlocked.Increment(ref _reloadAppliedCount);
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Interlocked.Exchange(ref _lastReloadUtcTicks, timestamp.UtcTicks);
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}
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/// <summary>Bumps <see cref="ReloadRejectedCount"/>.</summary>
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public void RecordReloadRejected()
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=> Interlocked.Increment(ref _reloadRejectedCount);
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}
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