LifetimeServices Classe

Definição

public ref class LifetimeServices sealed

public sealed class LifetimeServices

[System.Runtime.InteropServices.ComVisible(true)]
public sealed class LifetimeServices

[System.Runtime.InteropServices.ComVisible(true)]
[System.Security.SecurityCritical]
public sealed class LifetimeServices

type LifetimeServices = class

[<System.Runtime.InteropServices.ComVisible(true)>]
type LifetimeServices = class

[<System.Runtime.InteropServices.ComVisible(true)>]
[<System.Security.SecurityCritical>]
type LifetimeServices = class

Public NotInheritable Class LifetimeServices

Herança

Object

LifetimeServices

Atributos

ComVisibleAttribute SecurityCriticalAttribute

Exemplos

#using <system.dll>
#using <system.runtime.remoting.dll>
#using "service.dll"

using namespace System;
using namespace System::Runtime::Remoting;
using namespace System::Runtime::Remoting::Channels;
using namespace System::Runtime::Remoting::Channels::Http;
using namespace System::Runtime::Remoting::Lifetime;

int main()
{
   LifetimeServices::LeaseTime = TimeSpan::FromSeconds( 5 );
   LifetimeServices::LeaseManagerPollTime = TimeSpan::FromSeconds( 3 );
   LifetimeServices::RenewOnCallTime = TimeSpan::FromSeconds( 2 );
   LifetimeServices::SponsorshipTimeout = TimeSpan::FromSeconds( 1 );
   ChannelServices::RegisterChannel( gcnew HttpChannel( 8080 ) );
   RemotingConfiguration::RegisterActivatedServiceType( ClientActivatedType::typeid );
   Console::WriteLine( "The server is listening. Press Enter to exit...." );
   Console::ReadLine();
   Console::WriteLine( "GC'ing." );
   GC::Collect();
   GC::WaitForPendingFinalizers();
   return 0;
}

using System;
using System.Runtime.Remoting;
using System.Runtime.Remoting.Channels;
using System.Runtime.Remoting.Channels.Http;
using System.Runtime.Remoting.Lifetime;

public class Server {

   public static void Main() {

      Server myServer = new Server();
      myServer.Run();
   }

   public void Run()
   {
      LifetimeServices.LeaseTime = TimeSpan.FromSeconds(5);
      LifetimeServices.LeaseManagerPollTime = TimeSpan.FromSeconds(3);
      LifetimeServices.RenewOnCallTime = TimeSpan.FromSeconds(2);
      LifetimeServices.SponsorshipTimeout = TimeSpan.FromSeconds(1);

      ChannelServices.RegisterChannel(new HttpChannel(8080), true);
      RemotingConfiguration.RegisterActivatedServiceType(typeof(ClientActivatedType));

      Console.WriteLine("The server is listening. Press Enter to exit....");
      Console.ReadLine();

      Console.WriteLine("GC'ing.");
      GC.Collect();
      GC.WaitForPendingFinalizers();
   }
}

Imports System.Runtime.Remoting
Imports System.Runtime.Remoting.Channels
Imports System.Runtime.Remoting.Channels.Http
Imports System.Runtime.Remoting.Lifetime
Imports System.Security.Permissions


Public Class Server
   
   Public Shared Sub Main()
      Dim myServer As New Server()
      myServer.Run()
   End Sub

<SecurityPermission(SecurityAction.Demand, Flags:=SecurityPermissionFlag.Infrastructure)> _ 
   Public Sub Run()
      LifetimeServices.LeaseTime = TimeSpan.FromSeconds(5)
      LifetimeServices.LeaseManagerPollTime = TimeSpan.FromSeconds(3)
      LifetimeServices.RenewOnCallTime = TimeSpan.FromSeconds(2)
      LifetimeServices.SponsorshipTimeout = TimeSpan.FromSeconds(1)
      
      
      ChannelServices.RegisterChannel(New HttpChannel(8080), True)
      RemotingConfiguration.RegisterActivatedServiceType(GetType(ClientActivatedType))
      
      Console.WriteLine("The server is listening. Press Enter to exit....")
      Console.ReadLine()
      
      Console.WriteLine("GC'ing.")
      GC.Collect()
      GC.WaitForPendingFinalizers()
   End Sub
   
End Class

Observações

A recolha distribuída de lixo é responsável por controlar a vida útil das aplicações de servidor e por as eliminar quando as suas vidas terminaram. Tradicionalmente, a recolha de lixo distribuída utiliza contagens de referência e ping para controlo. Isto funciona bem quando há poucos clientes por objeto, mas não funciona bem quando há milhares de clientes por objeto. O serviço ao longo da vida pode assumir a função de um coletor de lixo distribuído tradicional, e escala bem quando o número de clientes aumenta.

O serviço vitalício associa um contrato de arrendamento a cada objeto ativado remotamente. Quando o contrato de arrendamento expira, o objeto é removido.