update use of timers

MediaBrowser.Dlna/PlayTo/PlayToManager.cs

@@ -36,7 +36,7 @@ namespace MediaBrowser.Dlna.PlayTo
         private readonly IMediaSourceManager _mediaSourceManager;
 
         private readonly List<string> _nonRendererUrls = new List<string>();
-        private Timer _clearNonRenderersTimer;
+        private DateTime _lastRendererClear;
 
         public PlayToManager(ILogger logger, ISessionManager sessionManager, ILibraryManager libraryManager, IUserManager userManager, IDlnaManager dlnaManager, IServerApplicationHost appHost, IImageProcessor imageProcessor, IDeviceDiscovery deviceDiscovery, IHttpClient httpClient, IServerConfigurationManager config, IUserDataManager userDataManager, ILocalizationManager localization, IMediaSourceManager mediaSourceManager)
         {
@@ -57,19 +57,9 @@ namespace MediaBrowser.Dlna.PlayTo
 
         public void Start()
         {
-            _clearNonRenderersTimer = new Timer(OnClearUrlTimerCallback, null, TimeSpan.FromMinutes(10), TimeSpan.FromMinutes(10));
-
             _deviceDiscovery.DeviceDiscovered += _deviceDiscovery_DeviceDiscovered;
         }
 
-        private void OnClearUrlTimerCallback(object state)
-        {
-            lock (_nonRendererUrls)
-            {
-                _nonRendererUrls.Clear();
-            }
-        }
-
         async void _deviceDiscovery_DeviceDiscovered(object sender, SsdpMessageEventArgs e)
         {
             string usn;
@@ -99,6 +89,12 @@ namespace MediaBrowser.Dlna.PlayTo
 
                 lock (_nonRendererUrls)
                 {
+                    if ((DateTime.UtcNow - _lastRendererClear).TotalMinutes >= 10)
+                    {
+                        _nonRendererUrls.Clear();
+                        _lastRendererClear = DateTime.UtcNow;
+                    }
+
                     if (_nonRendererUrls.Contains(location, StringComparer.OrdinalIgnoreCase))
                     {
                         return;
@@ -181,12 +177,6 @@ namespace MediaBrowser.Dlna.PlayTo
         public void Dispose()
         {
             _deviceDiscovery.DeviceDiscovered -= _deviceDiscovery_DeviceDiscovered;
-
-            if (_clearNonRenderersTimer != null)
-            {
-                _clearNonRenderersTimer.Dispose();
-                _clearNonRenderersTimer = null;
-            }
         }
     }
 }

MediaBrowser.Server.Implementations/News/NewsEntryPoint.cs

@@ -1,6 +1,5 @@
 using MediaBrowser.Common.Configuration;
 using MediaBrowser.Common.Extensions;
-using MediaBrowser.Common.IO;
 using MediaBrowser.Common.Net;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Controller.Notifications;
@@ -17,12 +16,13 @@ using System.Threading;
 using System.Threading.Tasks;
 using System.Xml;
 using CommonIO;
+using MediaBrowser.Common.Threading;
 
 namespace MediaBrowser.Server.Implementations.News
 {
     public class NewsEntryPoint : IServerEntryPoint
     {
-        private Timer _timer;
+        private PeriodicTimer _timer;
         private readonly IHttpClient _httpClient;
         private readonly IApplicationPaths _appPaths;
         private readonly IFileSystem _fileSystem;
@@ -47,7 +47,7 @@ namespace MediaBrowser.Server.Implementations.News
 
         public void Run()
         {
-            _timer = new Timer(OnTimerFired, null, TimeSpan.FromMilliseconds(500), _frequency);
+            _timer = new PeriodicTimer(OnTimerFired, null, TimeSpan.FromMilliseconds(500), _frequency);
         }
 
         /// <summary>

MediaBrowser.Server.Startup.Common/EntryPoints/KeepServerAwake.cs

@@ -4,7 +4,7 @@ using MediaBrowser.Controller.Session;
 using MediaBrowser.Model.Logging;
 using System;
 using System.Linq;
-using System.Threading;
+using MediaBrowser.Common.Threading;
 
 namespace MediaBrowser.Server.Startup.Common.EntryPoints
 {
@@ -12,7 +12,7 @@ namespace MediaBrowser.Server.Startup.Common.EntryPoints
     {
         private readonly ISessionManager _sessionManager;
         private readonly ILogger _logger;
-        private Timer _timer;
+        private PeriodicTimer _timer;
         private readonly IServerApplicationHost _appHost;
 
         public KeepServerAwake(ISessionManager sessionManager, ILogger logger, IServerApplicationHost appHost)
@@ -24,7 +24,7 @@ namespace MediaBrowser.Server.Startup.Common.EntryPoints
 
         public void Run()
         {
-            _timer = new Timer(obj =>
+            _timer = new PeriodicTimer(obj =>
             {
                 var now = DateTime.UtcNow;
                 if (_sessionManager.Sessions.Any(i => (now - i.LastActivityDate).TotalMinutes < 15))