internal AsyncUserToken FindByUID(string uid)
{
if (uid == string.Empty || uid == "")
{
return(null);
}
AsyncUserToken asyncUserToken = null;
if (this.OnlineUID.Any(key => key == uid))
{
asyncUserToken = Busypool[uid];
}
return(asyncUserToken);
}
private void CloseClientSocket(AsyncUserToken token)
{
// close the socket associated with the client
try
{
token.Socket.Shutdown(SocketShutdown.Send);
}
// throws if client process has already closed
catch (Exception) { }
token.Socket.Close();
// decrement the counter keeping track of the total number of clients connected to the server
Interlocked.Decrement(ref m_totalConnectedSockets);
_previouseSemaphore = m_maxNumberAcceptedClients.Release();
m_userTokenPool.Push(token);
}
// This method is invoked when an asynchronous send operation completes.
// The method issues another receive on the socket to read any additional
// data sent from the client
//
// <param name="e"></param>
private void ProcessSend(SocketAsyncEventArgs e)
{
if (e.SocketError == SocketError.Success)
{
// done echoing data back to the client
AsyncUserToken token = (AsyncUserToken)e.UserToken;
// read the next block of data send from the client
bool willRaiseEvent = token.Socket.ReceiveAsync(token.ReceiveSaea);
if (!willRaiseEvent)
{
ProcessReceive(token.ReceiveSaea);
}
}
else
{
CloseClientSocket(e.UserToken as AsyncUserToken);
}
}
internal AsyncUserToken Pop(string uid)
{
if (uid == string.Empty || uid == "")
{
return(null);
}
AsyncUserToken asyncUserToken = null;
lock (this.Pool)
{
asyncUserToken = this.Pool.Pop();
}
asyncUserToken.UID = uid;
asyncUserToken.Available = true; //mark the state of pool is not the initial step
if (!Busypool.TryAdd(uid, asyncUserToken))
{
_logger.Error("Cannot add to Busy pool, client:{0}, already connected", uid);
}
return(asyncUserToken);
}
// Initializes the server by preallocating reusable buffers and
// context objects. These objects do not need to be preallocated
// or reused, but it is done this way to illustrate how the API can
// easily be used to create reusable objects to increase server performance.
//
public void Init()
{
// Allocates one large byte buffer which all I/O operations use a piece of. This gaurds
// against memory fragmentation
m_bufferManager.InitBuffer();
// preallocate pool of SocketAsyncEventArgs objects
AsyncUserToken asyncUserToken;
for (int i = 0; i < m_maxConnections; i++)
{
//Pre-allocate a set of reusable asyncUserToken
asyncUserToken = new AsyncUserToken {
ReceiveSaea = new TCCSocketAsyncEventArgs(), SendSaea = new TCCSocketAsyncEventArgs()
};
asyncUserToken.ReceiveSaea.Completed += new EventHandler <SocketAsyncEventArgs>(IO_Completed);
asyncUserToken.SendSaea.Completed += new EventHandler <SocketAsyncEventArgs>(IO_Completed);
//只给接收的SocketAsyncEventArgs设置缓冲区
m_bufferManager.SetBuffer(asyncUserToken.ReceiveSaea);
// add asyncUserToken to the pool
m_userTokenPool.Push(asyncUserToken);
}
//Print Serever status
Thread prinThread = new Thread(() =>
{
while (true)
{
PrintCurrentConnections();
Thread.Sleep(1000);
}
})
{
IsBackground = true
};
prinThread.Start();
}
