nhet_cn_back_main/HybirdFrameworkDriver/TcpServer/SessionMgr.cs

using System.Collections.Concurrent;
using DotNetty.Buffers;
using DotNetty.Transport.Channels;
using log4net;

namespace HybirdFrameworkDriver.TcpServer;

public class SessionMgr
{
    private static readonly ILog Log = LogManager.GetLogger(typeof(SessionMgr));

    private static readonly ConcurrentDictionary<string, IoSession> Dictionary =
        new ConcurrentDictionary<string, IoSession>();

    public static void RegisterSession(string key, IoSession ioSession)
    {
        ioSession.Key = key;
        IoSession? session;
        Dictionary.Remove(ioSession.Key, out session);
        Dictionary.AddOrUpdate(key, ioSession, (k, oldSession) => ioSession);
    }

    public static void UnregisterSession(IChannel channel)
    {
        IoSession session = ChannelUtils.GetSessionBy(channel);
        IoSession? outSession;
        Dictionary.Remove(session.Key, out outSession);
        session.Close();
    }

    public static void Broadcast(IByteBuffer buffer)
    {
        foreach (IoSession session in Dictionary.Values)
        {
            session.Send(buffer);
        }
    }
}