Question

我有WCF service如何在一台计算机上运行，simple comsole application client在另一台计算机上运行。服务器做一些非常简单的事情：一个返回客户端发送的2号值的方法：

[ServiceContract]
public interface IMySampleWCFService
{
    [OperationContract]
    int Add(int num1, int num2);

    [OperationContract]
    void CreateDirectory(string directory);

    [OperationContract]
    string GetVendorToRun(string path);
}

    public class MySampleWCFService : IMySampleWCFService
    {
        public int Add(int num1, int num2)
        {
            return num1 + num2;
        }
    }

App.config中：

<?xml version="1.0" encoding="utf-8" ?>
<configuration>

  <system.web>
    <compilation debug="true" />
  </system.web>
  <!-- When deploying the service library project, the content of the config file must be added to the host's 
  app.config file. System.Configuration does not support config files for libraries. -->
  <system.serviceModel>
    <services>
      <service name="WCFServiceHostingInWinService.MySampleWCFService">
        <endpoint
          name="ServiceHttpEndPoint"
          address="" 
          binding="basicHttpBinding"
          contract="WCFServiceHostingInWinService.IMySampleWCFService">
        </endpoint>
        <endpoint
          name="ServiceMexEndPoint"
          address="mex"
          binding="mexHttpBinding"
          contract="IMetadataExchange" />
        <host>
          <baseAddresses>
            <add baseAddress="http://192.0.16.250:8733/MySampleWCFService/" />
          </baseAddresses>
        </host>
      </service>
    </services>
    <behaviors>
      <serviceBehaviors>
        <behavior>
          <!-- To avoid disclosing metadata information, 
          set the value below to false before deployment -->
          <serviceMetadata httpGetEnabled="True"/>
          <!-- To receive exception details in faults for debugging purposes, 
          set the value below to true.  Set to false before deployment 
          to avoid disclosing exception information -->
          <serviceDebug includeExceptionDetailInFaults="True" />
        </behavior>
      </serviceBehaviors>
    </behaviors>
  </system.serviceModel>

</configuration>

我想做什么并且难以实现，因为我是一名新开发人员，将Discovery添加到我的WCF service，假设我有多个服务安装在多台机器上，客户端应用程序是打开的，我想要什么到现在哪些服务还在运行以及我可以从Discovery收到的所有这些数据。我尝试阅读几篇文章，但正如我提到的那样，不明白该怎么做，我会很乐意帮助。

Answer 1

使用WCF Discovery有点令人费解，很少有人在我的经验中实际使用它，但确实有效。此MSDN article具有将Discovery添加到服务和服务所需的所有详细信息。客户端配置文件。

WCF Discovery背后的前提是您以与默认MEX端点类似的方式公开新的发现端点。 MEX端点允许服务向客户端提供WSDL。 WCF发现端点通过基于UDP的客户端UDP响应响应向客户端公开已配置的服务。上面的概述链接提供了更多细节。

以下是您的服务配置的样子：

<system.serviceModel>
    <services>
      <service name="WCFServiceHostingInWinService.MySampleWCFService">
        <endpoint
          name="ServiceHttpEndPoint"
          address="" 
          binding="basicHttpBinding"
          contract="WCFServiceHostingInWinService.IMySampleWCFService"
          behaviorConfiguration="endpointDiscoveryBehavior">
        </endpoint>
        <endpoint
          name="ServiceMexEndPoint"
          address="mex"
          binding="mexHttpBinding"
          contract="IMetadataExchange" />
        <!-- Discovery Endpoint: -->
        <endpoint kind="udpDiscoveryEndpoint" />
        <host>
          <baseAddresses>
            <add baseAddress="http://192.0.16.250:8733/MySampleWCFService/" />
          </baseAddresses>
        </host>
      </service>
      <!-- Announcement Listener Configuration -->
      <service name="AnnouncementListener">
        <endpoint kind="udpAnnouncementEndpoint" />
      </service>
    </services>
    <behaviors>
      <serviceBehaviors>
        <behavior>
          <!-- To avoid disclosing metadata information, 
          set the value below to false before deployment -->
          <serviceMetadata httpGetEnabled="True"/>
          <!-- To receive exception details in faults for debugging purposes, 
          set the value below to true.  Set to false before deployment 
          to avoid disclosing exception information -->
          <serviceDebug includeExceptionDetailInFaults="True" />
          <serviceDiscovery>
            <announcementEndpoints>
              <endpoint kind="udpAnnouncementEndpoint"/>
            </announcementEndpoints>
          </serviceDiscovery>
        </behavior>
      </serviceBehaviors>
      <endpointBehaviors>
        <behavior name="endpointDiscoveryBehavior">
          <endpointDiscovery enabled="true"/>
        </behavior>
     </endpointBehaviors>
    </behaviors>
</system.serviceModel>

Answer 2

我认为最简单的方法是尝试将客户端连接到您在运行时计算的地址。例如：

    static void Main(string[] args)
    {
        var addresses = new List<string>
        {
            @"http://192.168.1.1:8730/MySampleWCFService/",
            @"http://localhost:8731/MySampleWCFService/",
            @"http://localhost:8732/MySampleWCFService/",
            @"http://localhost:8733/MySampleWCFService/",
        };
        foreach (var address in addresses)
        {
            var client = new MySampleWCFServiceClient(new BasicHttpBinding(), new EndpointAddress(address));
            try
            {
                client.Open();
                client.Add(0, 1);
                Console.WriteLine("Connected to {0}", address);

            }
            catch (EndpointNotFoundException)
            {
                Console.WriteLine("Service at {0} is unreachable", address);
            }
        }
        Console.ReadLine();
    }

在我的情况下，我创建了一个包含地址的列表，但在您的情况下，您可以使用一些预定义的规则构建地址。例如，您知道服务使用具有某些名称和端口的http绑定。您也知道您的群集位于192.0.16.xxx LAN中，因此您可以使用公式：

address =“http：//”+ NextLanAddress（）+“：”+ port +“/”+ serviceName +“/”;

将Discovery添加到我的WCF服务

2 个答案: