/// <summary>
/// 关闭设备 Socket，并恢复该对象为可再次使用状态
/// </summary>
/// <param name="args"></param>
private void SocketAsyncFinish(SocketAsyncEventArgs args)
{
try
{
SocketClient _SocketClient = args.UserToken as SocketClient;
_SocketClient.ChangeState(SocketClientStateOptions.Free);
}
catch (Exception ex)
{
this.DoException(args, ex);
}
}
//处理登录队列
private void LogonTaskTake()
{
while (true)
{
SocketAsyncEventArgs args = this.m_LogonTask.Take();
try
{
SocketClient _SocketClient = args.UserToken as SocketClient;
_SocketClient.ChangeState(SocketClientStateOptions.Online);
}
catch (Exception ex)
{
this.DoException(args, ex);
}
}
}
//有新的设备 Socket 连接，将该对象设置为已连接状态
private void AcceptCallback(SocketAsyncEventArgs args)
{
try
{
if (args.SocketError == SocketError.Success)
{
byte[] bytBuffer = new byte[this.BufferSize];
args.SetBuffer(bytBuffer, 0, bytBuffer.Length);
SocketClient _SocketClient = args.UserToken as SocketClient;
_SocketClient.ChangeState(SocketClientStateOptions.Connected);
try
{
if (args.AcceptSocket.ReceiveAsync(args) == false)
{
this.ReceiveCallback(args);
}
}
catch (Exception ex)
{
this.DoException(args, ex);
this.SocketAsyncFinish(args);
}
}
else
{
this.DoException(args, new Exception("在 BeginAccept 方法中 SocketAsyncEventArgs 的 SocketError 属性为 " + args.SocketError.ToString() + "。"));
this.SocketAsyncFinish(args);
}
}
catch (Exception ex)
{
this.DoException(args, ex);
}
finally
{
this.Accept();
}
}
/// <summary>
/// 改变状态。
/// </summary>
/// <param name="state"></param>
public void ChangeState(SocketClientStateOptions state)
{
lock (this)
{
PrintState(state, false);
if (state != this.State)
{
switch (this.State)
{
case SocketClientStateOptions.Free:
if (state == SocketClientStateOptions.Connected)
{
if (this.m_Server.m_Connecteds.Contains(this.m_Args) == false)
{
this.m_Server.m_Connecteds.Add(this.m_Args);
this.State = state;
}
else
{
this.m_Server.DoException(this.m_Args, new Exception("状态从 " + this.State + " 变更为 " + state + " 时，连接队列中已存在当前异步套接字操作"));
}
}
else
{
if (this.CloseCount != 0)
{
PrintState(state, true);
}
}
break;
case SocketClientStateOptions.Connected:
SocketAsyncEventArgs argsOut;
if (this.m_Server.m_Connecteds.TryTake(out argsOut) == false)
{
this.m_Server.DoException(this.m_Args, new Exception("从异步套接字连接集合中移除连接时发生错误：未发现该套接字的连接信息。"));
}
if (state == SocketClientStateOptions.Online)
{
while (this.m_Server.m_Onlines.TryAdd(this.Address, this.m_Args) == false)
{
//如果加入登录后的集合中失败，则表示已有相同地址的连接已经登录
if (this.m_Server.m_Onlines.TryGetValue(this.Address, out argsOut))
{
SocketClient _SocketClientOut = argsOut.UserToken as SocketClient;
_SocketClientOut.ChangeState(SocketClientStateOptions.Free);
}
}
this.State = state;
}
else if (state == SocketClientStateOptions.Free)
{
this.Close();
}
break;
case SocketClientStateOptions.Online:
if (state == SocketClientStateOptions.Free)
{
SocketAsyncEventArgs argsDis;
if (this.m_Server.m_Onlines.TryRemove(this.Address, out argsDis) == false)
{
this.m_Server.DoException(this.m_Args, new Exception("从异步套接字在线集合中移除连接时发生错误：未发现该套接字的在线信息。(该异常通常为强制关闭连接后出现，不影响后续操作)"));
}
this.Close();
}
else
{
PrintState(state, true);
}
break;
}
}
else
{
PrintState(state, true);
}
}
}
protected void ChangeState(SocketClient.SocketState state)
{
m_SocketClient.ChangeState(state);
}