class/corlib/System.Runtime.Remoting.Lifetime/LeaseManager.cs

   1 //
   2 // System.Runtime.Remoting.Identity.cs
   3 //
   4 // Author: Lluis Sanchez Gual (lluis@ideary.com)
   5 //
   6 // (C) 2003, Lluis Sanchez Gual
   7 //
   8
   9 //
  10 // Copyright (C) 2004 Novell, Inc (http://www.novell.com)
  11 //
  12 // Permission is hereby granted, free of charge, to any person obtaining
  13 // a copy of this software and associated documentation files (the
  14 // "Software"), to deal in the Software without restriction, including
  15 // without limitation the rights to use, copy, modify, merge, publish,
  16 // distribute, sublicense, and/or sell copies of the Software, and to
  17 // permit persons to whom the Software is furnished to do so, subject to
  18 // the following conditions:
  19 //
  20 // The above copyright notice and this permission notice shall be
  21 // included in all copies or substantial portions of the Software.
  22 //
  23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  27 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  28 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  29 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  30 //
  31
  32 using System;
  33 using System.Threading;
  34 using System.Collections;
  35 using System.Runtime.Remoting;
  36
  37 namespace System.Runtime.Remoting.Lifetime
  38 {
  39         internal class LeaseManager
  40         {
  41                 ArrayList _objects = new ArrayList();
  42                 Timer _timer = null;
  43
  44                 public void SetPollTime (TimeSpan timeSpan)
  45                 {
  46                         lock (_objects.SyncRoot)
  47                         {
  48                                 if (_timer != null)
  49                                         _timer.Change (timeSpan,timeSpan);
  50                         }
  51                 }
  52
  53                 public void TrackLifetime (ServerIdentity identity)
  54                 {
  55                         lock (_objects.SyncRoot)
  56                         {
  57                                 identity.Lease.Activate();
  58                                 _objects.Add (identity);
  59
  60                                 if (_timer == null) StartManager();
  61                         }
  62                 }
  63
  64                 public void StopTrackingLifetime (ServerIdentity identity)
  65                 {
  66                         lock (_objects.SyncRoot)
  67                         {
  68                                 _objects.Remove (identity);
  69                         }
  70                 }
  71
  72                 public void StartManager()
  73                 {
  74                         _timer = new Timer (new TimerCallback (ManageLeases), null, LifetimeServices.LeaseManagerPollTime,LifetimeServices.LeaseManagerPollTime);
  75                 }
  76
  77                 public void StopManager()
  78                 {
  79                         Timer t = _timer;
  80                         _timer = null;
  81                         t.Dispose();
  82                 }
  83
  84                 public void ManageLeases(object state)
  85                 {
  86                         lock (_objects.SyncRoot)
  87                         {
  88                                 int n=0;
  89                                 while (n < _objects.Count)
  90                                 {
  91                                         ServerIdentity ident = (ServerIdentity)_objects[n];
  92                                         ident.Lease.UpdateState();
  93                                         if (ident.Lease.CurrentState == LeaseState.Expired)
  94                                         {
  95                                                 _objects.RemoveAt (n);
  96                                                 ident.OnLifetimeExpired ();
  97                                         }
  98                                         else
  99                                                 n++;
 100                                 }
 101
 102                                 if (_objects.Count == 0)
 103                                         StopManager();
 104                         }
 105                 }
 106         }
 107 }