ed78a100e2
Port trie-based subject matching engine (81 features, 74 tests). Includes SubscriptionIndex with cache, wildcard matching (*/>), queue subscription groups, reverse match, notifications, stats, and subject validation utilities. Also adds minimal Subscription and NatsClient stubs needed by the index.
78 lines
2.6 KiB
C#
78 lines
2.6 KiB
C#
// Copyright 2012-2025 The NATS Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// Adapted from server/client.go (subscription struct) in the NATS server Go source.
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namespace ZB.MOM.NatsNet.Server.Internal;
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/// <summary>
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/// Represents a client subscription in the NATS server.
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/// Mirrors the Go <c>subscription</c> struct from client.go.
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/// This is a minimal stub; full client integration will be added in later sessions.
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/// </summary>
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public sealed class Subscription
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{
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/// <summary>The subject this subscription is listening on.</summary>
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public byte[] Subject { get; set; } = [];
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/// <summary>The queue group name, or null/empty for non-queue subscriptions.</summary>
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public byte[]? Queue { get; set; }
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/// <summary>The subscription identifier.</summary>
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public byte[]? Sid { get; set; }
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/// <summary>Queue weight for remote queue subscriptions.</summary>
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public int Qw;
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/// <summary>Closed flag (0 = open, 1 = closed).</summary>
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private int _closed;
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/// <summary>The client that owns this subscription. Null in test/stub scenarios.</summary>
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public NatsClient? Client { get; set; }
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/// <summary>Marks this subscription as closed.</summary>
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public void Close() => Interlocked.Exchange(ref _closed, 1);
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/// <summary>Returns true if this subscription has been closed.</summary>
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public bool IsClosed() => Interlocked.CompareExchange(ref _closed, 0, 0) == 1;
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}
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/// <summary>
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/// Represents the kind of client connection.
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/// Mirrors Go's <c>clientKind</c> enum.
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/// This is a minimal stub; full implementation in later sessions.
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/// </summary>
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public enum ClientKind
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{
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Client = 0,
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Router = 1,
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Gateway = 2,
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System = 3,
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Leaf = 4,
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JetStream = 5,
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Account = 6,
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}
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/// <summary>
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/// Minimal client stub for subscription routing.
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/// Full implementation will be added in later sessions.
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/// </summary>
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public class NatsClient
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{
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/// <summary>The kind of client connection.</summary>
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public ClientKind Kind { get; set; }
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/// <summary>Whether this is a hub leaf node. Stub for now.</summary>
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public virtual bool IsHubLeafNode() => false;
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}
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