基于IPC-CFX的点对点通信C#
IPC-CFX有两种主要的通信方式，可以通过RabbitMQ发布和订阅，也可以通过request和response进行点对点的通信，本文主要讲的是点对点的通信方式。
在vscode里建立新的dotnet项目，可以通过终端输入dotnet new console来建立，文件目录为CFXDemo->machine1和CFXDemo->machine2。
通过nuget插件分别为两个项目都安装CFX.CFXSDK、AMQPNetLite.Core和Newtonsoft.Json这几个metapackage。
我们将machine1作为发送端（sendRequest)，machine2作为接收端(Receive)，则Machine1的代码如下所示：
using System.Threading;
using CFX;
using CFX.Transport;
using System;
using System.Security.Principal;
namespace machine1
{
class Program
{
static void Main(string[] args)
{
OpenRequest();
Console.ReadLine();
for(int i = 0;i<5;i++){
SendRequest();
Thread.Sleep(2000);
}
}
static string sendCFXHandle = "a.b.001";
static string receiveCFXHandle = "a.b.002";
static string sendRequestUri = string.Format("amqp://127.0.0.1:1235");
static string receivRequestUri = string.Format("amqp://127.0.0.1:1234");
#region send request
static AmqpCFXEndpoint endpointSendRequest;
static void OpenRequest()
{
if (endpointSendRequest != null)
{
endpointSendRequest.Close();
endpointSendRequest = null;
}
endpointSendRequest = new AmqpCFXEndpoint();
if (!endpointSendRequest.IsOpen)
{
Console.WriteLine("endpointSendRequest.IsOpen:" + endpointSendRequest.IsOpen.ToString());
endpointSendRequest.Open(sendCFXHandle); //这一步会绑定endpointSendRequest里的CFXHandle，即sendCFXHandle的值
Console.WriteLine("Request.Source is : {0}",endpointSendRequest.CFXHandle);
Console.WriteLine("endpointSendRequest.IsOpen:" + endpointSendRequest.IsOpen.ToString());
}
// Set a timeout of 20 seconds. If the target endpoint does not
// respond in this time, the request will time out.
AmqpCFXEndpoint.RequestTimeout = TimeSpan.FromSeconds(20);
}
static void SendRequest()
{
// Build a GetEndpointInfomation Request
CFXEnvelope request = CFXEnvelope.FromCFXMessage(new GetEndpointInformationRequest()
{
CFXHandle = receiveCFXHandle
});
request.Source = endpointSendRequest.CFXHandle;
request.Target = receiveCFXHandle;
try
{
CFXEnvelope response = endpointSendRequest.ExecuteRequest(receivRequestUri, request);
Console.WriteLine($"response:\n{response.ToJson(true)}");
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
#endregion send request
#region receive request
static AmqpCFXEndpoint endpointReceiveRequest;
static void OpenReceive()
{
if (endpointReceiveRequest != null)
{
endpointReceiveRequest.Close();
endpointReceiveRequest = null;
}
endpointReceiveRequest = new AmqpCFXEndpoint();
endpointReceiveRequest.OnRequestReceived -= Endpoint_OnRequestReceived;
endpointReceiveRequest.OnRequestReceived += Endpoint_OnRequestReceived;
if (!endpointReceiveRequest.IsOpen)
{
Console.WriteLine("endpointSendRequest.IsOpen:" + endpointReceiveRequest.IsOpen.ToString());
endpointReceiveRequest.Open(receiveCFXHandle, new Uri(receivRequestUri));
Console.WriteLine("endpointSendRequest.IsOpen:" + endpointReceiveRequest.IsOpen.ToString());
}
}
static CFXEnvelope Endpoint_OnRequestReceived(CFXEnvelope request)
{
Console.WriteLine($"Endpoint_OnRequestReceived: { request.ToString()}");
// Process request. Return Result.
if (request.MessageBody is WhoIsThereRequest)
{
CFXEnvelope result = CFXEnvelope.FromCFXMessage(new WhoIsThereResponse()
{ CFXHandle = receiveCFXHandle, RequestNetworkUri = receivRequestUri, RequestTargetAddress = "" });
result.Source = receiveCFXHandle;
result.Target = request.Source;
result.TimeStamp = DateTime.Now;
return result;
}
if (request.MessageBody is GetEndpointInformationRequest)
{
CFXEnvelope result = CFXEnvelope.FromCFXMessage(new WhoIsThereResponse()
{ CFXHandle = receiveCFXHandle, RequestNetworkUri = receivRequestUri, RequestTargetAddress = "...." });
result.Source = receiveCFXHandle;
result.Target = request.Source;
result.TimeStamp = DateTime.Now;
return result;
}
return null;
}
#endregion receive request
}
}作为接收端，machine2的代码如下所示：
using CFX;
using CFX.Transport;
using System;
namespace machine2
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("ReceivEndPoint is waiting Request......");
OpenReceive();
Console.WriteLine("Press Enter Key to end the App");
Console.ReadKey();
}
static string sendCFXHandle = "a.b.001";
static string receiveCFXHandle = "a.b.002";
static string sendRequestUri = string.Format("amqp://127.0.0.1:1235");
static string receivRequestUri = string.Format("amqp://127.0.0.1:1234");
#region send request
static AmqpCFXEndpoint endpointSendRequest;
static void OpenRequest()
{
if (endpointSendRequest != null)
{
endpointSendRequest.Close();
endpointSendRequest = null;
}
endpointSendRequest = new AmqpCFXEndpoint();
if (!endpointSendRequest.IsOpen)
{
Console.WriteLine("endpointSendRequest.IsOpen:" + endpointSendRequest.IsOpen.ToString());
endpointSendRequest.Open(receiveCFXHandle, new Uri(receivRequestUri));
Console.WriteLine("endpointSendRequest.IsOpen:" + endpointSendRequest.IsOpen.ToString());
}
// Set a timeout of 20 seconds. If the target endpoint does not
// respond in this time, the request will time out.
AmqpCFXEndpoint.RequestTimeout = TimeSpan.FromSeconds(20);
}
static void SendRequest()
{
// Build a GetEndpointInfomation Request
CFXEnvelope request = CFXEnvelope.FromCFXMessage(new GetEndpointInformationRequest()
{
CFXHandle = receiveCFXHandle
});
request.Source = endpointSendRequest.CFXHandle;
request.Target = receiveCFXHandle;
try
{
CFXEnvelope response = endpointSendRequest.ExecuteRequest(receivRequestUri, request);
Console.WriteLine($"response:\n{response.ToJson(true)}");
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
#endregion send request
#region receive request
static AmqpCFXEndpoint endpointReceiveRequest;
static void OpenReceive()
{
if (endpointReceiveRequest != null)
{
endpointReceiveRequest.Close();
endpointReceiveRequest = null;
}
endpointReceiveRequest = new AmqpCFXEndpoint();
endpointReceiveRequest.OnRequestReceived -= Endpoint_OnRequestReceived;
endpointReceiveRequest.OnRequestReceived += Endpoint_OnRequestReceived;
if (!endpointReceiveRequest.IsOpen)
{
Console.WriteLine("endpointSendRequest.IsOpen:" + endpointReceiveRequest.IsOpen.ToString());
endpointReceiveRequest.Open(receiveCFXHandle, new Uri(receivRequestUri));
//endpointReceiveRequest.Open(receiveCFXHandle);
Console.WriteLine("endpointSendRequest.IsOpen:" + endpointReceiveRequest.IsOpen.ToString());
}
}
static CFXEnvelope Endpoint_OnRequestReceived(CFXEnvelope request)
{
Console.WriteLine($"Endpoint_OnRequestReceived: { request.ToString()}");
Console.WriteLine($"request:\n{request.ToJson(true)}");
// Process request. Return Result.
if (request.MessageBody is WhoIsThereRequest)
{
CFXEnvelope result = CFXEnvelope.FromCFXMessage(new WhoIsThereResponse()
{ CFXHandle = receiveCFXHandle, RequestNetworkUri = receivRequestUri, RequestTargetAddress = "" });
result.Source = receiveCFXHandle;
result.Target = request.Source;
result.TimeStamp = DateTime.Now;
return result;
}
if (request.MessageBody is GetEndpointInformationRequest)
{
CFXEnvelope result = CFXEnvelope.FromCFXMessage(new WhoIsThereResponse()
{ CFXHandle = receiveCFXHandle, RequestNetworkUri = receivRequestUri, RequestTargetAddress = "..." });
result.Source = receiveCFXHandle;
result.Target = request.Source;
result.TimeStamp = DateTime.Now;
return result;
}
return null;
}
#endregion receive request
}
} 运行结果，可以用json格式对response和request的内容进行解析。