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// ==++==
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// ==--==
//+----------------------------------------------------------------------------
//
// File: ClientSponsor.cs
//
// Contents: Agent for keeping Server Object's lifetime in sync with a client's lifetime
//
// History: 8/9/00 <EMAIL>Microsoft</EMAIL> Created
//
//+----------------------------------------------------------------------------
namespace System.Runtime.Remoting.Lifetime
{
using System;
using System.Collections;
using System.Security.Permissions;
[System.Security.SecurityCritical] // auto-generated_required
[SecurityPermissionAttribute(SecurityAction.InheritanceDemand, Flags=SecurityPermissionFlag.Infrastructure)]
[System.Runtime.InteropServices.ComVisible(true)]
public class ClientSponsor : MarshalByRefObject, ISponsor
{
private Hashtable sponsorTable = new Hashtable(10);
private TimeSpan m_renewalTime = TimeSpan.FromMinutes(2);
public ClientSponsor()
{
}
public ClientSponsor(TimeSpan renewalTime)
{
this.m_renewalTime = renewalTime;
}
public TimeSpan RenewalTime
{
get{ return m_renewalTime;}
set{ m_renewalTime = value;}
}
[System.Security.SecurityCritical] // auto-generated
public bool Register(MarshalByRefObject obj)
{
BCLDebug.Trace("REMOTE", "ClientSponsor Register "+obj);
ILease lease = (ILease)obj.GetLifetimeService();
if (lease == null)
return false;
lease.Register(this);
lock(sponsorTable)
{
sponsorTable[obj] = lease;
}
return true;
}
[System.Security.SecurityCritical] // auto-generated
public void Unregister(MarshalByRefObject obj)
{
BCLDebug.Trace("REMOTE", "ClientSponsor Unregister "+obj);
ILease lease = null;
lock(sponsorTable)
{
lease = (ILease)sponsorTable[obj];
}
if (lease != null)
lease.Unregister(this);
}
// ISponsor method
[System.Security.SecurityCritical]
public TimeSpan Renewal(ILease lease)
{
BCLDebug.Trace("REMOTE", "ClientSponsor Renewal "+m_renewalTime);
return m_renewalTime;
}
[System.Security.SecurityCritical] // auto-generated
public void Close()
{
BCLDebug.Trace("REMOTE","ClientSponsor Close");
lock(sponsorTable)
{
IDictionaryEnumerator e = sponsorTable.GetEnumerator();
while(e.MoveNext())
((ILease)e.Value).Unregister(this);
sponsorTable.Clear();
}
}
// Don't create a lease on the sponsor
[System.Security.SecurityCritical]
public override Object InitializeLifetimeService()
{
return null;
}
[System.Security.SecuritySafeCritical] // finalizers should be treated as safe
~ClientSponsor()
{
BCLDebug.Trace("REMOTE","ClientSponsor Finalize");
}
}
}
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