LifetimeServices Classe

Definizione

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

Ereditarietà

Object

LifetimeServices

Attributi

ComVisibleAttribute SecurityCriticalAttribute

Esempio

#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

Commenti

Garbage Collection distribuito è responsabile del controllo della durata delle applicazioni server e dell'eliminazione quando le durate sono scadute. In genere, garbage collection distribuito usa i conteggi dei riferimenti e il ping per il controllo. Questa operazione funziona bene quando sono presenti alcuni client per oggetto, ma non funziona correttamente quando sono presenti migliaia di client per ogni oggetto. Il servizio di durata può presupporre la funzione di un Garbage Collector distribuito tradizionale e viene ridimensionato correttamente quando aumenta il numero di client.

Il servizio di durata associa un lease a ogni oggetto attivato in remoto. Alla scadenza del lease, l'oggetto viene rimosso.

Costruttori

Proprietà

Metodi

Si applica a