5bae9cc289
Register VARZ, HEALTHZ, SUBSZ, STATSZ, and IDZ request-reply handlers
on $SYS.REQ.SERVER.{id}.* subjects and $SYS.REQ.SERVER.PING.* wildcard
subjects via InitEventTracking. Also excludes the $SYS system account
from the /subz monitoring endpoint by default since its subscriptions
are internal infrastructure.
98 lines
3.2 KiB
C#
98 lines
3.2 KiB
C#
using Microsoft.AspNetCore.Http;
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using NATS.Server.Subscriptions;
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namespace NATS.Server.Monitoring;
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/// <summary>
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/// Handles /subz endpoint requests, returning subscription information.
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/// Corresponds to Go server/monitor.go handleSubsz.
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/// </summary>
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public sealed class SubszHandler(NatsServer server)
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{
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public Subsz HandleSubsz(HttpContext ctx)
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{
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var opts = ParseQueryParams(ctx);
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var now = DateTime.UtcNow;
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// Collect subscriptions from all accounts (or filtered).
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// Exclude the $SYS system account unless explicitly requested — its internal
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// subscriptions are infrastructure and not user-facing.
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var allSubs = new List<Subscription>();
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foreach (var account in server.GetAccounts())
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{
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if (!string.IsNullOrEmpty(opts.Account) && account.Name != opts.Account)
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continue;
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if (string.IsNullOrEmpty(opts.Account) && account.Name == "$SYS")
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continue;
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allSubs.AddRange(account.SubList.GetAllSubscriptions());
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}
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// Filter by test subject if provided
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if (!string.IsNullOrEmpty(opts.Test))
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{
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allSubs = allSubs.Where(s => SubjectMatch.MatchLiteral(opts.Test, s.Subject)).ToList();
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}
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var total = allSubs.Count;
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var numSubs = server.GetAccounts()
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.Where(a => (string.IsNullOrEmpty(opts.Account) && a.Name != "$SYS") || a.Name == opts.Account)
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.Aggregate(0u, (sum, a) => sum + a.SubList.Count);
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var numCache = server.GetAccounts()
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.Where(a => (string.IsNullOrEmpty(opts.Account) && a.Name != "$SYS") || a.Name == opts.Account)
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.Sum(a => a.SubList.CacheCount);
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SubDetail[] details = [];
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if (opts.Subscriptions)
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{
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details = allSubs
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.Skip(opts.Offset)
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.Take(opts.Limit)
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.Select(s => new SubDetail
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{
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Subject = s.Subject,
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Queue = s.Queue ?? "",
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Sid = s.Sid,
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Msgs = Interlocked.Read(ref s.MessageCount),
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Max = s.MaxMessages,
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Cid = s.Client?.Id ?? 0,
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})
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.ToArray();
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}
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return new Subsz
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{
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Id = server.ServerId,
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Now = now,
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NumSubs = numSubs,
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NumCache = numCache,
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Total = total,
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Offset = opts.Offset,
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Limit = opts.Limit,
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Subs = details,
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};
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}
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private static SubszOptions ParseQueryParams(HttpContext ctx)
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{
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var q = ctx.Request.Query;
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var opts = new SubszOptions();
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if (q.TryGetValue("subs", out var subs))
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opts.Subscriptions = subs == "true" || subs == "1" || subs == "detail";
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if (q.TryGetValue("offset", out var offset) && int.TryParse(offset, out var o))
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opts.Offset = o;
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if (q.TryGetValue("limit", out var limit) && int.TryParse(limit, out var l))
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opts.Limit = l;
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if (q.TryGetValue("acc", out var acc))
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opts.Account = acc.ToString();
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if (q.TryGetValue("test", out var test))
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opts.Test = test.ToString();
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return opts;
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}
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}
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