57 lines
2.2 KiB
C#
57 lines
2.2 KiB
C#
using System;
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using System.Collections.Generic;
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namespace XWorld.Server.Gateway
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{
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// pid -> Session。只在 actor 线程被改，故无锁。
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public sealed class SessionManager
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{
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private readonly Dictionary<int, Session> _byPid = new Dictionary<int, Session>();
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public Session OnConnect(int pid, IClientConnection conn)
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{
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if (_byPid.TryGetValue(pid, out var s))
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{
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s.Connection = conn; // 重连：重绑新连接，保留 RoomId
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s.Connected = true;
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return s;
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}
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s = new Session { PlayerId = pid, Connection = conn, Connected = true };
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_byPid[pid] = s;
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return s;
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}
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public void OnDisconnect(int pid, IClientConnection conn, long currentTick)
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{
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// 仅当断的是"当前连接"才标离线，避免旧连接的迟到断线清掉已重连的新连接
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if (_byPid.TryGetValue(pid, out var s) && ReferenceEquals(s.Connection, conn))
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{
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s.Connected = false;
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s.DisconnectedAtTick = currentTick;
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}
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}
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public IClientConnection GetConnection(int pid)
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=> _byPid.TryGetValue(pid, out var s) && s.Connected ? s.Connection : null;
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public bool IsConnected(int pid) => _byPid.TryGetValue(pid, out var s) && s.Connected;
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public Session Get(int pid) => _byPid.TryGetValue(pid, out var s) ? s : null;
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/// <summary>移除断线且"严格越过"重连窗口的会话（currentTick - DisconnectedAtTick > windowTicks）。返回被移除的会话；无则空数组。</summary>
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public IReadOnlyList<Session> SweepExpired(long currentTick, long windowTicks)
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{
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List<Session> removed = null;
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foreach (var kv in _byPid)
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{
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var s = kv.Value;
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if (!s.Connected && currentTick - s.DisconnectedAtTick > windowTicks)
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(removed ??= new List<Session>()).Add(s);
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}
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if (removed != null)
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foreach (var s in removed) _byPid.Remove(s.PlayerId);
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return removed ?? (IReadOnlyList<Session>)Array.Empty<Session>();
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}
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}
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}
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