Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / clr / src / BCL / System / Runtime / Remoting / LifetimeServices.cs / 1305376 / LifetimeServices.cs
// ==++==
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// ==--==
//+----------------------------------------------------------------------------
//
// Microsoft Windows
// File: LifetimeServices.cs
//
// Contents: Used to obtain a lease <
//
//+---------------------------------------------------------------------------
namespace System.Runtime.Remoting.Lifetime
{
using System;
using System.Threading;
using System.Security;
using System.Security.Permissions;
using System.Runtime.Remoting.Contexts;
using System.Runtime.Remoting.Messaging;
using System.Globalization;
// access needs to be restricted
[System.Security.SecurityCritical] // auto-generated_required
[System.Runtime.InteropServices.ComVisible(true)]
public sealed class LifetimeServices
{
// Set once boolean
private static bool isLeaseTime = false;
private static bool isRenewOnCallTime = false;
private static bool isSponsorshipTimeout = false;
// Default values
private static TimeSpan m_leaseTime = TimeSpan.FromMinutes(5);
private static TimeSpan m_renewOnCallTime = TimeSpan.FromMinutes(2);
private static TimeSpan m_sponsorshipTimeout = TimeSpan.FromMinutes(2);
private static TimeSpan m_pollTime = TimeSpan.FromMilliseconds(10000);
// Testing values
//private static TimeSpan m_leaseTime = TimeSpan.FromSeconds(20);
//private static TimeSpan m_renewOnCallTime = TimeSpan.FromSeconds(20);
//private static TimeSpan m_sponsorshipTimeout = TimeSpan.FromSeconds(20);
//private static TimeSpan m_pollTime = TimeSpan.FromMilliseconds(10000);
private static Object s_LifetimeSyncObject = null;
private static Object LifetimeSyncObject
{
get
{
if (s_LifetimeSyncObject == null)
{
Object o = new Object();
Interlocked.CompareExchange(ref s_LifetimeSyncObject, o, null);
}
return s_LifetimeSyncObject;
}
}
// This should have been a static class, but wasn't as of v3.5. Clearly, this is
// broken. We'll keep this in V4 for binary compat, but marked obsolete as error
// so migrated source code gets fixed.
[Obsolete("Do not create instances of the LifetimeServices class. Call the static methods directly on this type instead", true)]
public LifetimeServices()
{
// Should be a static type - this exists in V4 for binary compatiblity.
}
// Initial Lease Time span for appdomain
public static TimeSpan LeaseTime
{
get{ return m_leaseTime; }
[System.Security.SecurityCritical] // auto-generated
[SecurityPermissionAttribute(SecurityAction.Demand, Flags=SecurityPermissionFlag.RemotingConfiguration)]
set
{
lock(LifetimeSyncObject)
{
if (isLeaseTime)
throw new RemotingException(Environment.GetResourceString("Remoting_Lifetime_SetOnce", "LeaseTime"));
m_leaseTime = value;
isLeaseTime = true;
}
}
}
// Initial renew on call time span for appdomain
public static TimeSpan RenewOnCallTime
{
get{ return m_renewOnCallTime; }
[System.Security.SecurityCritical] // auto-generated
[SecurityPermissionAttribute(SecurityAction.Demand, Flags=SecurityPermissionFlag.RemotingConfiguration)]
set
{
lock(LifetimeSyncObject)
{
if (isRenewOnCallTime)
throw new RemotingException(Environment.GetResourceString("Remoting_Lifetime_SetOnce", "RenewOnCallTime"));
m_renewOnCallTime = value;
isRenewOnCallTime = true;
}
}
}
// Initial sponsorshiptimeout for appdomain
public static TimeSpan SponsorshipTimeout
{
get{ return m_sponsorshipTimeout; }
[System.Security.SecurityCritical] // auto-generated
[SecurityPermissionAttribute(SecurityAction.Demand, Flags=SecurityPermissionFlag.RemotingConfiguration)]
set
{
lock(LifetimeSyncObject)
{
if (isSponsorshipTimeout)
throw new RemotingException(Environment.GetResourceString("Remoting_Lifetime_SetOnce", "SponsorshipTimeout"));
m_sponsorshipTimeout = value;
isSponsorshipTimeout = true;
}
}
}
// Initial sponsorshiptimeout for appdomain
public static TimeSpan LeaseManagerPollTime
{
get{ return m_pollTime; }
[System.Security.SecurityCritical] // auto-generated
[SecurityPermissionAttribute(SecurityAction.Demand, Flags=SecurityPermissionFlag.RemotingConfiguration)]
set
{
lock(LifetimeSyncObject)
{
m_pollTime = value;
if (LeaseManager.IsInitialized())
LeaseManager.GetLeaseManager().ChangePollTime(m_pollTime);
}
}
}
[System.Security.SecurityCritical] // auto-generated
internal static ILease GetLeaseInitial(MarshalByRefObject obj)
{
ILease lease = null;
LeaseManager leaseManager = LeaseManager.GetLeaseManager(LeaseManagerPollTime);
lease = (ILease)leaseManager.GetLease(obj);
if (lease == null)
lease = CreateLease(obj);
return lease;
}
[System.Security.SecurityCritical] // auto-generated
internal static ILease GetLease(MarshalByRefObject obj)
{
ILease lease = null;
LeaseManager leaseManager = LeaseManager.GetLeaseManager(LeaseManagerPollTime);
lease = (ILease)leaseManager.GetLease(obj);
return lease;
}
//internal static ILease CreateLease(MarshalByRefObject obj, IMessageSink nextSink)
[System.Security.SecurityCritical] // auto-generated
internal static ILease CreateLease(MarshalByRefObject obj)
{
return CreateLease(LeaseTime, RenewOnCallTime, SponsorshipTimeout, obj);
}
[System.Security.SecurityCritical] // auto-generated
internal static ILease CreateLease(TimeSpan leaseTime,
TimeSpan renewOnCallTime,
TimeSpan sponsorshipTimeout,
MarshalByRefObject obj
)
{
// Will create leaseManager if not already created.
LeaseManager.GetLeaseManager(LeaseManagerPollTime);
return (ILease)(new Lease(leaseTime, renewOnCallTime, sponsorshipTimeout, obj));
}
}
[Serializable]
internal class LeaseLifeTimeServiceProperty : IContextProperty, IContributeObjectSink
{
public String Name
{
[System.Security.SecurityCritical] // auto-generated
get {return "LeaseLifeTimeServiceProperty";}
}
[System.Security.SecurityCritical] // auto-generated
public bool IsNewContextOK(Context newCtx)
{
return true;
}
[System.Security.SecurityCritical] // auto-generated
public void Freeze(Context newContext)
{
}
// Initiates the creation of a lease
// Creates a sink for invoking a renew on call when an object is created.
[System.Security.SecurityCritical] // auto-generated
public IMessageSink GetObjectSink(MarshalByRefObject obj,
IMessageSink nextSink)
{
bool fServer;
ServerIdentity identity = (ServerIdentity)MarshalByRefObject.GetIdentity(obj, out fServer);
BCLDebug.Assert(identity != null, "[LifetimeServices.GetObjectSink] identity != null");
// NOTE: Single Call objects do not have a lease associated with it because they last
// only for the duration of the call.
// Singleton objects on the other hand do have leases associated with them and they can
// be garbage collected.
if (identity.IsSingleCall())
{
BCLDebug.Trace("REMOTE", "LeaseLifeTimeServiceProperty.GetObjectSink, no lease SingleCall",obj,", NextSink "+nextSink);
return nextSink;
}
// Create lease. InitializeLifetimeService is a virtual method which can be overridded so that a lease with
// object specific properties can be created.
Object leaseObj = obj.InitializeLifetimeService();
BCLDebug.Trace("REMOTE", "LeaseLifeTimeServiceProperty.GetObjectSink, return from InitializeLifetimeService obj ",obj,", lease ",leaseObj);
// InitializeLifetimeService can return a lease in one of conditions:
// 1) the lease has a null state which specifies that no lease is to be created.
// 2) the lease has an initial state which specifies that InitializeLifeTimeService has created a new lease.
// 3) the lease has another state which indicates that the lease has already been created and registered.
if (leaseObj == null)
{
BCLDebug.Trace("REMOTE", "LeaseLifeTimeServiceProperty.GetObjectSink, no lease ",obj,", NextSink "+nextSink);
return nextSink;
}
if (!(leaseObj is System.Runtime.Remoting.Lifetime.ILease))
throw new RemotingException(Environment.GetResourceString("Remoting_Lifetime_ILeaseReturn", leaseObj));
ILease ilease = (ILease)leaseObj;
if (ilease.InitialLeaseTime.CompareTo(TimeSpan.Zero) <= 0)
{
// No lease
{
BCLDebug.Trace("REMOTE", "LeaseLifeTimeServiceProperty.GetObjectSink, no lease because InitialLeaseTime is Zero ",obj);
if (ilease is System.Runtime.Remoting.Lifetime.Lease)
{
((Lease)ilease).Remove();
}
return nextSink;
}
}
Lease lease = null;
lock(identity)
{
if (identity.Lease != null)
{
// Lease already exists for object, object is being marsalled again
BCLDebug.Trace("REMOTE", "LeaseLifeTimeServiceProperty.GetObjectSink, Lease already exists for object ",obj);
lease = (Lease)identity.Lease;
lease.Renew(lease.InitialLeaseTime); // Reset initial lease time
}
else
{
// New lease
if (!(ilease is System.Runtime.Remoting.Lifetime.Lease))
{
// InitializeLifetimeService created its own ILease object
// Need to create a System.Runtime.Remoting.Lease object
BCLDebug.Trace("REMOTE", "LeaseLifeTimeServiceProperty.GetObjectSink, New Lease, lease not of type Lease ",obj);
lease = (Lease)LifetimeServices.GetLeaseInitial(obj);
if (lease.CurrentState == LeaseState.Initial)
{
lease.InitialLeaseTime = ilease.InitialLeaseTime;
lease.RenewOnCallTime = ilease.RenewOnCallTime;
lease.SponsorshipTimeout = ilease.SponsorshipTimeout;
}
}
else
{
// An object of Type Lease was created
BCLDebug.Trace("REMOTE", "LeaseLifeTimeServiceProperty.GetObjectSink, New Lease, lease is type Lease ",obj);
lease = (Lease)ilease;
}
// Put lease in active state
// Creation phase of lease is over, properties can no longer be set on lease.
identity.Lease = lease; // Place lease into identity for object
// If the object has been marshaled activate
// the lease
if (identity.ObjectRef != null)
{
lease.ActivateLease();
}
}
}
if (lease.RenewOnCallTime > TimeSpan.Zero)
{
// RenewOnCall create sink
BCLDebug.Trace("REMOTE", "LeaseLifeTimeServiceProperty.GetObjectSink, lease created ",obj);
return new LeaseSink(lease, nextSink);
}
else
{
// No RenewOnCall so no sink created
BCLDebug.Trace("REMOTE", "LeaseLifeTimeServiceProperty.GetObjectSink, No RenewOnCall so no sink created ",obj);
return nextSink;
}
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// ==++==
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// ==--==
//+----------------------------------------------------------------------------
//
// Microsoft Windows
// File: LifetimeServices.cs
//
// Contents: Used to obtain a lease <
//
//+---------------------------------------------------------------------------
namespace System.Runtime.Remoting.Lifetime
{
using System;
using System.Threading;
using System.Security;
using System.Security.Permissions;
using System.Runtime.Remoting.Contexts;
using System.Runtime.Remoting.Messaging;
using System.Globalization;
// access needs to be restricted
[System.Security.SecurityCritical] // auto-generated_required
[System.Runtime.InteropServices.ComVisible(true)]
public sealed class LifetimeServices
{
// Set once boolean
private static bool isLeaseTime = false;
private static bool isRenewOnCallTime = false;
private static bool isSponsorshipTimeout = false;
// Default values
private static TimeSpan m_leaseTime = TimeSpan.FromMinutes(5);
private static TimeSpan m_renewOnCallTime = TimeSpan.FromMinutes(2);
private static TimeSpan m_sponsorshipTimeout = TimeSpan.FromMinutes(2);
private static TimeSpan m_pollTime = TimeSpan.FromMilliseconds(10000);
// Testing values
//private static TimeSpan m_leaseTime = TimeSpan.FromSeconds(20);
//private static TimeSpan m_renewOnCallTime = TimeSpan.FromSeconds(20);
//private static TimeSpan m_sponsorshipTimeout = TimeSpan.FromSeconds(20);
//private static TimeSpan m_pollTime = TimeSpan.FromMilliseconds(10000);
private static Object s_LifetimeSyncObject = null;
private static Object LifetimeSyncObject
{
get
{
if (s_LifetimeSyncObject == null)
{
Object o = new Object();
Interlocked.CompareExchange(ref s_LifetimeSyncObject, o, null);
}
return s_LifetimeSyncObject;
}
}
// This should have been a static class, but wasn't as of v3.5. Clearly, this is
// broken. We'll keep this in V4 for binary compat, but marked obsolete as error
// so migrated source code gets fixed.
[Obsolete("Do not create instances of the LifetimeServices class. Call the static methods directly on this type instead", true)]
public LifetimeServices()
{
// Should be a static type - this exists in V4 for binary compatiblity.
}
// Initial Lease Time span for appdomain
public static TimeSpan LeaseTime
{
get{ return m_leaseTime; }
[System.Security.SecurityCritical] // auto-generated
[SecurityPermissionAttribute(SecurityAction.Demand, Flags=SecurityPermissionFlag.RemotingConfiguration)]
set
{
lock(LifetimeSyncObject)
{
if (isLeaseTime)
throw new RemotingException(Environment.GetResourceString("Remoting_Lifetime_SetOnce", "LeaseTime"));
m_leaseTime = value;
isLeaseTime = true;
}
}
}
// Initial renew on call time span for appdomain
public static TimeSpan RenewOnCallTime
{
get{ return m_renewOnCallTime; }
[System.Security.SecurityCritical] // auto-generated
[SecurityPermissionAttribute(SecurityAction.Demand, Flags=SecurityPermissionFlag.RemotingConfiguration)]
set
{
lock(LifetimeSyncObject)
{
if (isRenewOnCallTime)
throw new RemotingException(Environment.GetResourceString("Remoting_Lifetime_SetOnce", "RenewOnCallTime"));
m_renewOnCallTime = value;
isRenewOnCallTime = true;
}
}
}
// Initial sponsorshiptimeout for appdomain
public static TimeSpan SponsorshipTimeout
{
get{ return m_sponsorshipTimeout; }
[System.Security.SecurityCritical] // auto-generated
[SecurityPermissionAttribute(SecurityAction.Demand, Flags=SecurityPermissionFlag.RemotingConfiguration)]
set
{
lock(LifetimeSyncObject)
{
if (isSponsorshipTimeout)
throw new RemotingException(Environment.GetResourceString("Remoting_Lifetime_SetOnce", "SponsorshipTimeout"));
m_sponsorshipTimeout = value;
isSponsorshipTimeout = true;
}
}
}
// Initial sponsorshiptimeout for appdomain
public static TimeSpan LeaseManagerPollTime
{
get{ return m_pollTime; }
[System.Security.SecurityCritical] // auto-generated
[SecurityPermissionAttribute(SecurityAction.Demand, Flags=SecurityPermissionFlag.RemotingConfiguration)]
set
{
lock(LifetimeSyncObject)
{
m_pollTime = value;
if (LeaseManager.IsInitialized())
LeaseManager.GetLeaseManager().ChangePollTime(m_pollTime);
}
}
}
[System.Security.SecurityCritical] // auto-generated
internal static ILease GetLeaseInitial(MarshalByRefObject obj)
{
ILease lease = null;
LeaseManager leaseManager = LeaseManager.GetLeaseManager(LeaseManagerPollTime);
lease = (ILease)leaseManager.GetLease(obj);
if (lease == null)
lease = CreateLease(obj);
return lease;
}
[System.Security.SecurityCritical] // auto-generated
internal static ILease GetLease(MarshalByRefObject obj)
{
ILease lease = null;
LeaseManager leaseManager = LeaseManager.GetLeaseManager(LeaseManagerPollTime);
lease = (ILease)leaseManager.GetLease(obj);
return lease;
}
//internal static ILease CreateLease(MarshalByRefObject obj, IMessageSink nextSink)
[System.Security.SecurityCritical] // auto-generated
internal static ILease CreateLease(MarshalByRefObject obj)
{
return CreateLease(LeaseTime, RenewOnCallTime, SponsorshipTimeout, obj);
}
[System.Security.SecurityCritical] // auto-generated
internal static ILease CreateLease(TimeSpan leaseTime,
TimeSpan renewOnCallTime,
TimeSpan sponsorshipTimeout,
MarshalByRefObject obj
)
{
// Will create leaseManager if not already created.
LeaseManager.GetLeaseManager(LeaseManagerPollTime);
return (ILease)(new Lease(leaseTime, renewOnCallTime, sponsorshipTimeout, obj));
}
}
[Serializable]
internal class LeaseLifeTimeServiceProperty : IContextProperty, IContributeObjectSink
{
public String Name
{
[System.Security.SecurityCritical] // auto-generated
get {return "LeaseLifeTimeServiceProperty";}
}
[System.Security.SecurityCritical] // auto-generated
public bool IsNewContextOK(Context newCtx)
{
return true;
}
[System.Security.SecurityCritical] // auto-generated
public void Freeze(Context newContext)
{
}
// Initiates the creation of a lease
// Creates a sink for invoking a renew on call when an object is created.
[System.Security.SecurityCritical] // auto-generated
public IMessageSink GetObjectSink(MarshalByRefObject obj,
IMessageSink nextSink)
{
bool fServer;
ServerIdentity identity = (ServerIdentity)MarshalByRefObject.GetIdentity(obj, out fServer);
BCLDebug.Assert(identity != null, "[LifetimeServices.GetObjectSink] identity != null");
// NOTE: Single Call objects do not have a lease associated with it because they last
// only for the duration of the call.
// Singleton objects on the other hand do have leases associated with them and they can
// be garbage collected.
if (identity.IsSingleCall())
{
BCLDebug.Trace("REMOTE", "LeaseLifeTimeServiceProperty.GetObjectSink, no lease SingleCall",obj,", NextSink "+nextSink);
return nextSink;
}
// Create lease. InitializeLifetimeService is a virtual method which can be overridded so that a lease with
// object specific properties can be created.
Object leaseObj = obj.InitializeLifetimeService();
BCLDebug.Trace("REMOTE", "LeaseLifeTimeServiceProperty.GetObjectSink, return from InitializeLifetimeService obj ",obj,", lease ",leaseObj);
// InitializeLifetimeService can return a lease in one of conditions:
// 1) the lease has a null state which specifies that no lease is to be created.
// 2) the lease has an initial state which specifies that InitializeLifeTimeService has created a new lease.
// 3) the lease has another state which indicates that the lease has already been created and registered.
if (leaseObj == null)
{
BCLDebug.Trace("REMOTE", "LeaseLifeTimeServiceProperty.GetObjectSink, no lease ",obj,", NextSink "+nextSink);
return nextSink;
}
if (!(leaseObj is System.Runtime.Remoting.Lifetime.ILease))
throw new RemotingException(Environment.GetResourceString("Remoting_Lifetime_ILeaseReturn", leaseObj));
ILease ilease = (ILease)leaseObj;
if (ilease.InitialLeaseTime.CompareTo(TimeSpan.Zero) <= 0)
{
// No lease
{
BCLDebug.Trace("REMOTE", "LeaseLifeTimeServiceProperty.GetObjectSink, no lease because InitialLeaseTime is Zero ",obj);
if (ilease is System.Runtime.Remoting.Lifetime.Lease)
{
((Lease)ilease).Remove();
}
return nextSink;
}
}
Lease lease = null;
lock(identity)
{
if (identity.Lease != null)
{
// Lease already exists for object, object is being marsalled again
BCLDebug.Trace("REMOTE", "LeaseLifeTimeServiceProperty.GetObjectSink, Lease already exists for object ",obj);
lease = (Lease)identity.Lease;
lease.Renew(lease.InitialLeaseTime); // Reset initial lease time
}
else
{
// New lease
if (!(ilease is System.Runtime.Remoting.Lifetime.Lease))
{
// InitializeLifetimeService created its own ILease object
// Need to create a System.Runtime.Remoting.Lease object
BCLDebug.Trace("REMOTE", "LeaseLifeTimeServiceProperty.GetObjectSink, New Lease, lease not of type Lease ",obj);
lease = (Lease)LifetimeServices.GetLeaseInitial(obj);
if (lease.CurrentState == LeaseState.Initial)
{
lease.InitialLeaseTime = ilease.InitialLeaseTime;
lease.RenewOnCallTime = ilease.RenewOnCallTime;
lease.SponsorshipTimeout = ilease.SponsorshipTimeout;
}
}
else
{
// An object of Type Lease was created
BCLDebug.Trace("REMOTE", "LeaseLifeTimeServiceProperty.GetObjectSink, New Lease, lease is type Lease ",obj);
lease = (Lease)ilease;
}
// Put lease in active state
// Creation phase of lease is over, properties can no longer be set on lease.
identity.Lease = lease; // Place lease into identity for object
// If the object has been marshaled activate
// the lease
if (identity.ObjectRef != null)
{
lease.ActivateLease();
}
}
}
if (lease.RenewOnCallTime > TimeSpan.Zero)
{
// RenewOnCall create sink
BCLDebug.Trace("REMOTE", "LeaseLifeTimeServiceProperty.GetObjectSink, lease created ",obj);
return new LeaseSink(lease, nextSink);
}
else
{
// No RenewOnCall so no sink created
BCLDebug.Trace("REMOTE", "LeaseLifeTimeServiceProperty.GetObjectSink, No RenewOnCall so no sink created ",obj);
return nextSink;
}
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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