internal void RegisterChannel(PipeServiceClientChannel channel)
{
lock (this.listChannels)
{
if (channel != null && !this.listChannels.Contains(channel))
{
this.listChannels.Add(channel);
this.channels = this.listChannels.ToArray();
}
}
}
private void Listen4Connect()
{
IntervalLogger logger = new IntervalLogger(TimeSpan.FromMinutes(1));
NamedPipeServerStream listenPipeServerStream = null;
while (this.isRunning)
{
try
{
listenPipeServerStream = new NamedPipeServerStream(this.pipeName, PipeDirection.InOut, this.owner.maxNumberOfServerInstances, PipeTransmissionMode.Message, PipeOptions.Asynchronous, this.owner.bufferSize, this.owner.bufferSize);
//Console.WriteLine("等待客户端的连接");
listenPipeServerStream.WaitForConnection();
if (this.isRunning)
{
lock (this.syncObject)
{
if (this.isRunning)
{
TimeoutHelper timeoutHelper = this.owner.openTimeout < 0 ? new TimeoutHelper(TimeSpan.FromMilliseconds(60000)) : new TimeoutHelper(TimeSpan.FromMilliseconds(this.owner.openTimeout));
// 验证
BinarySerializeHelper.Write(this.formatter, listenPipeServerStream, this.pipeName, true, timeoutHelper);
// listenPipeServerStream.WaitForPipeDrain();
string clientResponse = BinarySerializeHelper.Read(this.formatter, listenPipeServerStream, true, timeoutHelper) as string;
PipeServiceClient pipeServiceClient = PipeServiceClient.Parse(clientResponse);
if (pipeServiceClient == null)
{
listenPipeServerStream.Close();
continue;
}
// 针对某个连接上的客户端，其第一个连接永远不超时，直到客户端主动关闭连接为止
int receiveTimeout = -1;
if (this.clients.ContainsKey(pipeServiceClient.AppInstanceId))
{
// 第一个连接之外的连接，如果一段时间没有接收到数据，则关闭该连接
receiveTimeout = this.owner.receiveTimeout;
pipeServiceClient = this.clients[pipeServiceClient.AppInstanceId];
}
else
{
this.clients[pipeServiceClient.AppInstanceId] = pipeServiceClient;
}
PipeServiceClientChannel channel = new PipeServiceClientChannel(pipeServiceClient, this.owner.listenThreadPriority, receiveTimeout, this.owner.sendTimeout);
channel.owner = this.owner;
channel.pipeStream = listenPipeServerStream;
pipeServiceClient.RegisterChannel(channel);
channel.Closed += new ClientChannelEventHandler(channel_ChannelClosed);
channel.DataReceived += new DataReceivedEventHandler(channel_DataReceived);
// 引发通道连接事件
this.owner.FireClientChannelConnected(new ClientChannelEventArgs(channel));
// 当是第一个连接时引发客户端连接事件
if (pipeServiceClient.Channels.Length <= 1)
{
this.owner.FireClientConnected(new ClientConnectEventArgs(pipeServiceClient));
}
//Console.WriteLine("开始监听客户端的请求");
channel.Open();
continue;
}
}
}
}
catch (System.Threading.ThreadAbortException)
{
// 捕获到 ThreadAbortException 时，在执行完 catch 块里的内容后，将立即结束整个线程的执行，因此要在 catch 里做必须的资源清理和标志设定工作
this.isListenThreadStoped = true;
if (listenPipeServerStream != null)
{
try
{
if (listenPipeServerStream.IsConnected)
{
listenPipeServerStream.Disconnect();
}
listenPipeServerStream.Close();
}
catch { }
}
}
catch (Exception err)
{
if (listenPipeServerStream != null)
{
try
{
if (listenPipeServerStream.IsConnected)
{
listenPipeServerStream.Disconnect();
}
listenPipeServerStream.Close();
}
catch { }
}
logger.Warn(err, PipeConstants.LogCategory);
System.Threading.Thread.Sleep(100);
}
finally
{
listenPipeServerStream = null;
}
}
this.isListenThreadStoped = true;
}
/// <summary>
/// 使用指定的配置文件名称、配置文件物理路径初始化 <see cref="ClientChannelEventArgs"/> 类的新实例。
/// </summary>
/// <param name="channel">事件相关的客户端。</param>
public ClientChannelEventArgs(PipeServiceClientChannel channel)
{
this.channel = channel;
}
public CallbackState(PipeServiceClientChannel channel, SendOrPostCallback callback)
{
this.channel = channel;
this.lengthBuffer = new byte[4];
this.callback = callback;
}
private static object ReadData(PipeServiceClientChannel channel, BinaryFormatter formatter, int length)
{
if (channel == null)
{
throw new ArgumentNullException("channel");
}
using (MemoryStream ms = new MemoryStream(length))
{
byte[] buffer = new byte[channel.pipeStream.InBufferSize];
// 当消息体较大时，对流的其余部分进行读取，这些输出以 maxBufferSize 为基准对消息体进行分块读取
// 这尽可能的减少了循环的次数，进而减少了异步调用（需要使用工作线程）的开销，最终尽可能的提升了性能
while (ms.Length < length)
{
int shouldReadCount = length - (int)ms.Length > buffer.Length ? buffer.Length : length - (int)ms.Length;
int readCount = channel.pipeStream.Read(buffer, 0, shouldReadCount);
if (readCount == 0)
{
// 由于管道关闭而引起的管道流已结束，这时读到的数据长度为 0，这时应抛出管道异常
throw new IOException("管道已关闭");
}
// 不是预期的长度，则抛出格式化异常
else if (readCount != shouldReadCount)
{
throw new InvalidDataException();
}
ms.Write(buffer, 0, readCount);
}
// 将内存流的位置设置到流的开头，以方便后续进行反序列化
ms.Seek(0, SeekOrigin.Begin);
object data = formatter.Deserialize(ms);
return data;
}
}
public static void BeginReceive(PipeServiceClientChannel channel, SendOrPostCallback callback)
{
CallbackState state = new CallbackState(channel, callback);
state.InvokeStacks.Add(new KeyValue<DateTime, string>()
{
Key = DateTime.Now,
Value = Thread.CurrentThread.ManagedThreadId.ToString("#000") + " " + (Thread.CurrentThread.IsThreadPoolThread ? "true" : "false") + " BeginRead: ChannelsCount=" + channel.Client.Channels.Length
});
channel.pipeStream.BeginRead(state.LengthBuffer, 0, state.LengthBuffer.Length, new AsyncCallback(ReadCallback), state);
}