/// <summary>
/// 构造会话管理器
/// </summary>
/// <param name="context"></param>
/// <param name="bufferSize"></param>
/// <param name="count"></param>
/// <param name="completed"></param>
public SessionManager(IContext context, int bufferSize, int count, EventHandler <SocketAsyncEventArgs> completed, TimeSpan timeOut)
{
_userTokenPool = new UserTokenPool(context, count);
_session = new MemoryCacheHelper <IUserToken>();
_timeOut = timeOut;
_bufferSize = bufferSize;
_completed = completed;
_bufferManager = new BufferManager(_bufferSize * count, _bufferSize);
_bufferManager.InitBuffer();
_argsPool = new SocketAsyncEventArgsPool(count * 2);
_argsPool.InitPool(_completed);
//不存在时处理
_session.OnChanged += _session_OnChanged;
}