WCF - Hosting

Como já sabemos, WCF - Windows Communication Foundation - é parte integrante do .NET Framework 3.0. Ele fornece um conjunto de classes para a construção e hospedagem de serviços baseando-se na arquitetura SOA (Service Oriented Architecture), podendo expor tais serviços para serem acessados através dos mais diversos tipos de protocolos, como por exemplo: HTTP, TCP, IPC e MSMQ.

por Israel Aéce

using System;
using System.ServiceModel;

namespace DevMinds.ComponentCS
{
    [ServiceContract]
    public interface IServiceContract
    {
        [OperationContract]
        string BoasVindas();

        [OperationContract]
        DateTime DataAtual();
    }
}

Imports System.ServiceModel

<ServiceContract()> _
Public Interface IServiceContract

    <OperationContract()> _
    Function BoasVindas() As String

    <OperationContract()> _
    Function DataAtual() As DateTime

End Interface

using System;
using System.ServiceModel;
using System.ServiceModel.Channels;
using System.ServiceModel.Description;

using DevMinds.ComponentCS;

static void Main(string[] args)
{
    using (ServiceHost host = new ServiceHost(typeof(DefaultService),
        new Uri("net.tcp://localhost:9000/")))
    {
        host.Description.Behaviors.Add(new ServiceMetadataBehavior());

        host.AddServiceEndpoint(
            typeof(IMetadataExchange),
            MetadataExchangeBindings.CreateMexTcpBinding(),
            "MEX/");

        host.AddServiceEndpoint(
            typeof(IServiceContract),
            new NetTcpBinding(),
            "DefaultService/");

        host.Open();
        Console.ReadLine();
    }
}

Imports System.ServiceModel
Imports System.ServiceModel.Channels
Imports System.ServiceModel.Description

Imports DevMinds.ComponentVB

Shared Sub Main()
    Using host As New ServiceHost(GetType(DefaultService), _
        New Uri("net.tcp://localhost:9000/"))

        host.Description.Behaviors.Add(New ServiceMetadataBehavior())

        host.AddServiceEndpoint( _
            GetType(IMetadataExchange), _
            MetadataExchangeBindings.CreateMexTcpBinding(), _
            "DefaultService/MEX/")

        host.AddServiceEndpoint( _
            GetType(IServiceContract), _
            New NetTcpBinding(), _
            "DefaultService/")

        host.Open()
        Console.ReadLine()
    End Using
End Sub

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <system.serviceModel>
    <services>
      <service name="DevMinds.ComponentVB.DefaultService" 
	       behaviorConfiguration="MEX">
        <host>
          <baseAddresses>
            <add baseAddress="net.tcp://localhost:9000/"/>
          </baseAddresses>
        </host>
        <endpoint
          contract="IMetadataExchange"          
          binding="mexTcpBinding"
          address="MEX/" />
        <endpoint
          contract="DevMinds.ComponentVB.IServiceContract"
          binding="netTcpBinding"
          address="DefaultService/" />
      </service>
    </services>
    <behaviors>
      <serviceBehaviors>
        <behavior name="MEX">
          <serviceMetadata />
        </behavior>
      </serviceBehaviors>
    </behaviors>
  </system.serviceModel>
</configuration>

[ C# ]
<%@ ServiceHost Language="C#" 
                   Debug="true" 
                   Service="DefaultService"
                   CodeBehind="~/App_Code/DefaultService.cs" %>

[ VB.NET ]
<%@ ServiceHost Language="VB" 
                   Debug="true" 
                   Service="DefaultService"
                   CodeBehind="~/App_Code/DefaultService.vb" %>

<?xml version="1.0"?>
<configuration>
  <system.serviceModel>
    <services>
      <service name="DefaultService" behaviorConfiguration="returnFaults">
        <endpoint 
          contract="DevMinds.ComponentCS.IServiceContract" 
          binding="wsHttpBinding"/>
      </service>
    </services>
    <behaviors>
      <serviceBehaviors>
        <behavior name="returnFaults">
          <serviceDebug includeExceptionDetailInFaults="true"/>
          <serviceMetadata httpGetEnabled="true" />
        </behavior>
      </serviceBehaviors>
    </behaviors>
  </system.serviceModel>
</configuration>

using System.ServiceModel.Activation;

[AspNetCompatibilityRequirements(
    RequirementsMode=AspNetCompatibilityRequirementsMode.Allowed)]
public class DefaultService : IServiceContract
{
    //Restante da implementação
}

Imports System.ServiceModel.Activation

<AspNetCompatibilityRequirements( _
    RequirementsMode:=AspNetCompatibilityRequirementsMode.Allowed)> _
Public Class DefaultService
    Implements IServiceContract

    "Restante da implementação
End Class

<?xml version="1.0"?>
<configuration>
  <system.serviceModel>
    <serviceHostingEnvironment aspNetCompatibilityEnabled="true" />
    <services>
      <service name="DefaultService">
        <!-- Endpoints -->
      </service>
    </services>
    <!-- Outras Configurações -->
  </system.serviceModel>
</configuration>