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feat: add PermissionLruCache (128-entry LRU) and wire into ClientPermissions

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This commit is contained in:
Joseph Doherty
2026-02-23 00:33:15 -05:00
parent 17a0a217dd
commit 7cf6bb866e
3 changed files with 121 additions and 3 deletions
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10
src/NATS.Server/Auth/ClientPermissions.cs
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@@ -1,4 +1,3 @@
using System.Collections.Concurrent;
using NATS.Server.Subscriptions;
namespace NATS.Server.Auth;
@@ -7,7 +6,7 @@ public sealed class ClientPermissions : IDisposable
{
private readonly PermissionSet? _publish;
private readonly PermissionSet? _subscribe;
private readonly ConcurrentDictionary<string, bool> _pubCache = new(StringComparer.Ordinal);
private readonly PermissionLruCache _pubCache = new(128);
private ClientPermissions(PermissionSet? publish, PermissionSet? subscribe)
{
@@ -34,7 +33,12 @@ public sealed class ClientPermissions : IDisposable
if (_publish == null)
return true;
return _pubCache.GetOrAdd(subject, _publish.IsAllowed);
if (_pubCache.TryGet(subject, out var cached))
return cached;
var allowed = _publish.IsAllowed(subject);
_pubCache.Set(subject, allowed);
return allowed;
}
public bool IsSubscribeAllowed(string subject, string? queue = null)