MarshalByRefObject.InitializeLifetimeService 方法

定义

命名空间:

System

程序集:

netstandard.dll, System.Runtime.dll

Source:

MarshalByRefObject.cs

注意

This Remoting API is not supported and throws PlatformNotSupportedException.

获取生存期服务对象来控制此实例的生存期策略。

public:
 virtual System::Object ^ InitializeLifetimeService();

[System.Obsolete("This Remoting API is not supported and throws PlatformNotSupportedException.", DiagnosticId="SYSLIB0010", UrlFormat="https://aka.ms/dotnet-warnings/{0}")]
public virtual object InitializeLifetimeService();

[<System.Obsolete("This Remoting API is not supported and throws PlatformNotSupportedException.", DiagnosticId="SYSLIB0010", UrlFormat="https://aka.ms/dotnet-warnings/{0}")>]
abstract member InitializeLifetimeService : unit -> obj
override this.InitializeLifetimeService : unit -> obj

Public Overridable Function InitializeLifetimeService () As Object

返回

Object

用于控制此实例的生存期策略的类型 ILease 的对象。 这是此实例的当前生存期服务对象（如果存在）;否则，初始化为 LeaseManagerPollTime 属性值的新生存期服务对象。

属性

ObsoleteAttribute

例外

SecurityException

即时调用方没有基础结构权限。

PlatformNotSupportedException

仅限 .NET Core 和 .NET 5+ ：在所有情况下。

示例

下面的代码示例演示如何创建租约。

public ref class MyClass: public MarshalByRefObject
{
public:
   
   [System::Security::Permissions::SecurityPermissionAttribute
   (System::Security::Permissions::SecurityAction::Demand,
   Flags=System::Security::Permissions::SecurityPermissionFlag::Infrastructure)]
   virtual Object^ InitializeLifetimeService() override
   {
      ILease^ lease = dynamic_cast<ILease^>(MarshalByRefObject::InitializeLifetimeService());
      if ( lease->CurrentState == LeaseState::Initial )
      {
         lease->InitialLeaseTime = TimeSpan::FromMinutes( 1 );
         lease->SponsorshipTimeout = TimeSpan::FromMinutes( 2 );
         lease->RenewOnCallTime = TimeSpan::FromSeconds( 2 );
      }

      return lease;
   }

};

public class MyClass : MarshalByRefObject
{
  public override Object InitializeLifetimeService()
  {
    ILease lease = (ILease)base.InitializeLifetimeService();
    if (lease.CurrentState == LeaseState.Initial)
    {
         lease.InitialLeaseTime = TimeSpan.FromMinutes(1);
         lease.SponsorshipTimeout = TimeSpan.FromMinutes(2);
          lease.RenewOnCallTime = TimeSpan.FromSeconds(2);
    }
      return lease;
  }
}

type MyClass() =
    inherit MarshalByRefObject()
   
    override _.InitializeLifetimeService() =
        let lease = base.InitializeLifetimeService() :?> ILease
        if lease.CurrentState = LeaseState.Initial then
            lease.InitialLeaseTime <- TimeSpan.FromMinutes 1
            lease.SponsorshipTimeout <- TimeSpan.FromMinutes 2
            lease.RenewOnCallTime <- TimeSpan.FromSeconds 2
        lease

Public Class LSClass
    Inherits MarshalByRefObject
    
    <SecurityPermissionAttribute(SecurityAction.Demand, _
                                 Flags:=SecurityPermissionFlag.Infrastructure)> _
    Public Overrides Function InitializeLifetimeService() As Object
        Dim lease As ILease = CType(MyBase.InitializeLifetimeService(), ILease)
        If lease.CurrentState = LeaseState.Initial Then
            lease.InitialLeaseTime = TimeSpan.FromMinutes(1)
            lease.SponsorshipTimeout = TimeSpan.FromMinutes(2)
            lease.RenewOnCallTime = TimeSpan.FromSeconds(2)
        End If
        Return lease
    End Function


    Public Shared Sub Main()  
    ' The main thread processing is here.
    End Sub
End Class

注解

从 .NET 5 开始，此方法标记为已过时。

有关生存期服务的详细信息，请参阅 LifetimeServices 该类。