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Nasıl yapılır: Keşif Proxy'sine Kayıtlı Bir Bulunabilir Hizmet Ekleme

Bu konu, bulma ara sunucusunun nasıl uygulandığını açıklayan dört konu başlığının ikincisidir. Bir önceki konu başlığı olan Nasıl yapılır: Bulma Ara Sunucusu Uygulama bölümünde bir bulma proxy'si uyguladınız. Bu konu başlığında, bulma ara sunucusuna duyuru iletileri (Hello ve Bye) gönderen bir WCF hizmeti oluşturursunuz ve bu da keşif proxy'sine kendisini kaydetmesine ve kaydını kaldırmasına neden olur.

Hizmet sözleşmesini tanımlamak için

  1. çözüme DiscoveryProxyExample adlı Serviceyeni bir konsol uygulaması projesi ekleyin.

  2. Aşağıdaki derlemelere başvurular ekleyin:

    1. System.ServiceModel

    2. System.ServiceModel.Discovery

  3. projeye adlı CalculatorServiceyeni bir sınıf ekleyin.

  4. Aşağıdaki using yönergeleri ekleyin.

    using System;
    using System.ServiceModel;
    
  5. CalculatorService.cs içinde hizmet sözleşmesini tanımlayın.

    // Define a service contract.
    [ServiceContract(Namespace = "http://Microsoft.Samples.Discovery")]
    public interface ICalculatorService
    {
        [OperationContract]
        double Add(double n1, double n2);
        [OperationContract]
        double Subtract(double n1, double n2);
        [OperationContract]
        double Multiply(double n1, double n2);
        [OperationContract]
        double Divide(double n1, double n2);
    }
    
  6. Ayrıca CalculatorService.cs içinde hizmet sözleşmesini uygulayın.

    // Service class which implements the service contract.
    public class CalculatorService : ICalculatorService
    {
        public double Add(double n1, double n2)
        {
            double result = n1 + n2;
            Console.WriteLine("Received Add({0},{1})", n1, n2);
            Console.WriteLine("Return: {0}", result);
            return result;
        }
    
        public double Subtract(double n1, double n2)
        {
            double result = n1 - n2;
            Console.WriteLine("Received Subtract({0},{1})", n1, n2);
            Console.WriteLine("Return: {0}", result);
            return result;
        }
    
        public double Multiply(double n1, double n2)
        {
            double result = n1 * n2;
            Console.WriteLine("Received Multiply({0},{1})", n1, n2);
            Console.WriteLine("Return: {0}", result);
            return result;
        }
    
        public double Divide(double n1, double n2)
        {
            double result = n1 / n2;
            Console.WriteLine("Received Divide({0},{1})", n1, n2);
            Console.WriteLine("Return: {0}", result);
            return result;
        }
    }
    

Hizmeti barındırmak için

  1. Projeyi oluştururken oluşturulan Program.cs dosyasını açın.

  2. Aşağıdaki using yönergeleri ekleyin.

    using System;
    using System.ServiceModel;
    using System.ServiceModel.Description;
    using System.ServiceModel.Discovery;
    
  3. yöntemine Main() aşağıdaki kodu ekleyin:

    // Define the base address of the service
    Uri baseAddress = new Uri("net.tcp://localhost:9002/CalculatorService/" + Guid.NewGuid().ToString());
    // Define the endpoint address where announcement messages will be sent
    Uri announcementEndpointAddress = new Uri("net.tcp://localhost:9021/Announcement");
    
    // Create the service host
    ServiceHost serviceHost = new ServiceHost(typeof(CalculatorService), baseAddress);
    try
    {
        // Add a service endpoint
        ServiceEndpoint netTcpEndpoint = serviceHost.AddServiceEndpoint(typeof(ICalculatorService),
            new NetTcpBinding(), string.Empty);
    
        // Create an announcement endpoint, which points to the Announcement Endpoint hosted by the proxy service.
        AnnouncementEndpoint announcementEndpoint = new AnnouncementEndpoint(new NetTcpBinding(),
            new EndpointAddress(announcementEndpointAddress));
    
        // Create a ServiceDiscoveryBehavior and add the announcement endpoint
        ServiceDiscoveryBehavior serviceDiscoveryBehavior = new ServiceDiscoveryBehavior();
        serviceDiscoveryBehavior.AnnouncementEndpoints.Add(announcementEndpoint);
    
        // Add the ServiceDiscoveryBehavior to the service host to make the service discoverable
        serviceHost.Description.Behaviors.Add(serviceDiscoveryBehavior);
    
        // Start listening for messages
        serviceHost.Open();
    
        Console.WriteLine("Calculator Service started at {0}", baseAddress);
        Console.WriteLine();
        Console.WriteLine("Press <ENTER> to terminate the service.");
        Console.WriteLine();
        Console.ReadLine();
    
        serviceHost.Close();
    }
    catch (CommunicationException e)
    {
        Console.WriteLine(e.Message);
    }
    catch (TimeoutException e)
    {
        Console.WriteLine(e.Message);
    }
    
    if (serviceHost.State != CommunicationState.Closed)
    {
        Console.WriteLine("Aborting the service...");
        serviceHost.Abort();
    }
    

Bulunabilir bir hizmet uygulamayı tamamladınız. Nasıl yapılır: Hizmet Bulmak için Bulma Ara Sunucusunu Kullanan bir İstemci Uygulaması Uygulama'ya geçin.

Örnek

Bu, bu konuda kullanılan kodun tam listesidir.

// CalculatorService.cs
//----------------------------------------------------------------
// Copyright (c) Microsoft Corporation.  All rights reserved.
//----------------------------------------------------------------

using System;
using System.ServiceModel;

namespace Microsoft.Samples.Discovery
{
    // Define a service contract.
    [ServiceContract(Namespace = "http://Microsoft.Samples.Discovery")]
    public interface ICalculatorService
    {
        [OperationContract]
        double Add(double n1, double n2);
        [OperationContract]
        double Subtract(double n1, double n2);
        [OperationContract]
        double Multiply(double n1, double n2);
        [OperationContract]
        double Divide(double n1, double n2);
    }

    // Service class which implements the service contract.
    public class CalculatorService : ICalculatorService
    {
        public double Add(double n1, double n2)
        {
            double result = n1 + n2;
            Console.WriteLine("Received Add({0},{1})", n1, n2);
            Console.WriteLine("Return: {0}", result);
            return result;
        }

        public double Subtract(double n1, double n2)
        {
            double result = n1 - n2;
            Console.WriteLine("Received Subtract({0},{1})", n1, n2);
            Console.WriteLine("Return: {0}", result);
            return result;
        }

        public double Multiply(double n1, double n2)
        {
            double result = n1 * n2;
            Console.WriteLine("Received Multiply({0},{1})", n1, n2);
            Console.WriteLine("Return: {0}", result);
            return result;
        }

        public double Divide(double n1, double n2)
        {
            double result = n1 / n2;
            Console.WriteLine("Received Divide({0},{1})", n1, n2);
            Console.WriteLine("Return: {0}", result);
            return result;
        }
    }
}
// Program.cs
//----------------------------------------------------------------
// Copyright (c) Microsoft Corporation.  All rights reserved.
//----------------------------------------------------------------

using System;
using System.ServiceModel;
using System.ServiceModel.Description;
using System.ServiceModel.Discovery;

namespace Microsoft.Samples.Discovery
{
    class Program
    {
        public static void Main()
        {
            Uri baseAddress = new Uri("net.tcp://localhost:9002/CalculatorService/" + Guid.NewGuid().ToString());
            Uri announcementEndpointAddress = new Uri("net.tcp://localhost:9021/Announcement");

            ServiceHost serviceHost = new ServiceHost(typeof(CalculatorService), baseAddress);
            try
            {
                ServiceEndpoint netTcpEndpoint = serviceHost.AddServiceEndpoint(typeof(ICalculatorService),
                    new NetTcpBinding(), string.Empty);

                // Create an announcement endpoint, which points to the Announcement Endpoint hosted by the proxy service.
                AnnouncementEndpoint announcementEndpoint = new AnnouncementEndpoint(new NetTcpBinding(),
                    new EndpointAddress(announcementEndpointAddress));

                ServiceDiscoveryBehavior serviceDiscoveryBehavior = new ServiceDiscoveryBehavior();
                serviceDiscoveryBehavior.AnnouncementEndpoints.Add(announcementEndpoint);

                // Make the service discoverable
                serviceHost.Description.Behaviors.Add(serviceDiscoveryBehavior);

                serviceHost.Open();

                Console.WriteLine("Calculator Service started at {0}", baseAddress);
                Console.WriteLine();
                Console.WriteLine("Press <ENTER> to terminate the service.");
                Console.WriteLine();
                Console.ReadLine();

                serviceHost.Close();
            }
            catch (CommunicationException e)
            {
                Console.WriteLine(e.Message);
            }
            catch (TimeoutException e)
            {
                Console.WriteLine(e.Message);
            }

            if (serviceHost.State != CommunicationState.Closed)
            {
                Console.WriteLine("Aborting the service...");
                serviceHost.Abort();
            }
        }
    }
}

Ayrıca bkz.