extracted an item refresh service

MediaBrowser.Api/ItemRefreshService.cs

@@ -0,0 +1,74 @@
+using MediaBrowser.Controller.Dto;
+using MediaBrowser.Controller.Entities;
+using MediaBrowser.Controller.Library;
+using ServiceStack.ServiceHost;
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace MediaBrowser.Api
+{
+    [Route("/Items/{Id}/Refresh", "POST")]
+    [Api(Description = "Refreshes metadata for an item")]
+    public class RefreshItem : IReturnVoid
+    {
+        [ApiMember(Name = "Forced", Description = "Indicates if a normal or forced refresh should occur.", IsRequired = false, DataType = "bool", ParameterType = "query", Verb = "POST")]
+        public bool Forced { get; set; }
+
+        [ApiMember(Name = "Recursive", Description = "Indicates if the refresh should occur recursively.", IsRequired = false, DataType = "bool", ParameterType = "query", Verb = "POST")]
+        public bool Recursive { get; set; }
+
+        [ApiMember(Name = "Id", Description = "Item Id", IsRequired = true, DataType = "string", ParameterType = "path", Verb = "POST")]
+        public string Id { get; set; }
+    }
+
+    public class ItemRefreshService : BaseApiService
+    {
+        private readonly ILibraryManager _libraryManager;
+        private readonly IUserManager _userManager;
+
+        public ItemRefreshService(ILibraryManager libraryManager, IUserManager userManager)
+        {
+            _libraryManager = libraryManager;
+            _userManager = userManager;
+        }
+
+        /// <summary>
+        /// Posts the specified request.
+        /// </summary>
+        /// <param name="request">The request.</param>
+        public void Post(RefreshItem request)
+        {
+            var task = RefreshItem(request);
+
+            Task.WaitAll(task);
+        }
+
+        /// <summary>
+        /// Refreshes the item.
+        /// </summary>
+        /// <param name="request">The request.</param>
+        /// <returns>Task.</returns>
+        private async Task RefreshItem(RefreshItem request)
+        {
+            var item = DtoBuilder.GetItemByClientId(request.Id, _userManager, _libraryManager);
+
+            var folder = item as Folder;
+
+            try
+            {
+                await item.RefreshMetadata(CancellationToken.None, forceRefresh: request.Forced).ConfigureAwait(false);
+
+                if (folder != null)
+                {
+                    await folder.ValidateChildren(new Progress<double>(), CancellationToken.None, request.Recursive,
+                                                request.Forced).ConfigureAwait(false);
+                }
+            }
+            catch (Exception ex)
+            {
+                Logger.ErrorException("Error refreshing library", ex);
+            }
+        }
+    }
+}

MediaBrowser.Api/ItemUpdateService.cs

@@ -1,14 +1,14 @@
-using System;
-using System.Linq;
-using System.Threading;
-using System.Threading.Tasks;
-using MediaBrowser.Controller.Dto;
+using MediaBrowser.Controller.Dto;
 using MediaBrowser.Controller.Entities;
 using MediaBrowser.Controller.Entities.Audio;
 using MediaBrowser.Controller.Entities.TV;
 using MediaBrowser.Controller.Library;
 using MediaBrowser.Model.Dto;
 using ServiceStack.ServiceHost;
+using System;
+using System.Linq;
+using System.Threading;
+using System.Threading.Tasks;
 
 namespace MediaBrowser.Api
 {

MediaBrowser.Api/LibraryService.cs

@@ -97,20 +97,6 @@ namespace MediaBrowser.Api
     {
     }
 
-    [Route("/Items/{Id}/Refresh", "POST")]
-    [Api(Description = "Refreshes metadata for an item")]
-    public class RefreshItem : IReturnVoid
-    {
-        [ApiMember(Name = "Forced", Description = "Indicates if a normal or forced refresh should occur.", IsRequired = false, DataType = "bool", ParameterType = "query", Verb = "POST")]
-        public bool Forced { get; set; }
-
-        [ApiMember(Name = "Recursive", Description = "Indicates if the refresh should occur recursively.", IsRequired = false, DataType = "bool", ParameterType = "query", Verb = "POST")]
-        public bool Recursive { get; set; }
-
-        [ApiMember(Name = "Id", Description = "Item Id", IsRequired = true, DataType = "string", ParameterType = "path", Verb = "POST")]
-        public string Id { get; set; }
-    }
-
     [Route("/Items/{Id}", "DELETE")]
     [Api(Description = "Deletes an item from the library and file system")]
     public class DeleteItem : IReturnVoid
@@ -390,42 +376,5 @@ namespace MediaBrowser.Api
             return ToOptimizedResult(result);
         }
 
-        /// <summary>
-        /// Posts the specified request.
-        /// </summary>
-        /// <param name="request">The request.</param>
-        public void Post(RefreshItem request)
-        {
-            var task = RefreshItem(request);
-
-            Task.WaitAll(task);
-        }
-
-        /// <summary>
-        /// Refreshes the item.
-        /// </summary>
-        /// <param name="request">The request.</param>
-        /// <returns>Task.</returns>
-        private async Task RefreshItem(RefreshItem request)
-        {
-            var item = DtoBuilder.GetItemByClientId(request.Id, _userManager, _libraryManager);
-
-            var folder = item as Folder;
-
-            try
-            {
-                await item.RefreshMetadata(CancellationToken.None, forceRefresh: request.Forced).ConfigureAwait(false);
-
-                if (folder != null)
-                {
-                    await folder.ValidateChildren(new Progress<double>(), CancellationToken.None, request.Recursive,
-                                                request.Forced).ConfigureAwait(false);
-                }
-            }
-            catch (Exception ex)
-            {
-                Logger.ErrorException("Error refreshing library", ex);
-            }
-        }
     }
 }

MediaBrowser.Api/MediaBrowser.Api.csproj

@@ -73,6 +73,7 @@
     <Compile Include="Images\ImageRequest.cs" />
     <Compile Include="Images\ImageService.cs" />
     <Compile Include="Images\ImageWriter.cs" />
+    <Compile Include="ItemRefreshService.cs" />
     <Compile Include="ItemUpdateService.cs" />
     <Compile Include="LibraryService.cs" />
     <Compile Include="Library\LibraryHelpers.cs" />

MediaBrowser.Common.Implementations/HttpClientManager/HttpClientManager.cs

@@ -87,7 +87,7 @@ namespace MediaBrowser.Common.Implementations.HttpClientManager
             {
                 var handler = new WebRequestHandler
                 {
-                    CachePolicy = new RequestCachePolicy(RequestCacheLevel.BypassCache),
+                    CachePolicy = new RequestCachePolicy(RequestCacheLevel.Revalidate),
                     AutomaticDecompression = enableHttpCompression ? DecompressionMethods.Deflate : DecompressionMethods.None
                 };
 

MediaBrowser.Controller/Entities/Audio/Artist.cs

@@ -4,7 +4,7 @@ namespace MediaBrowser.Controller.Entities.Audio
     /// <summary>
     /// Class Artist
     /// </summary>
-    public class Artist : BaseItem
+    public class Artist : BaseItem, IItemByName
     {
         /// <summary>
         /// Gets the user data key.

MediaBrowser.Controller/Entities/Audio/MusicGenre.cs

@@ -4,7 +4,7 @@ namespace MediaBrowser.Controller.Entities.Audio
     /// <summary>
     /// Class MusicGenre
     /// </summary>
-    public class MusicGenre : BaseItem
+    public class MusicGenre : BaseItem, IItemByName
     {
         /// <summary>
         /// Gets the user data key.

MediaBrowser.Controller/Entities/Genre.cs

@@ -4,7 +4,7 @@ namespace MediaBrowser.Controller.Entities
     /// <summary>
     /// Class Genre
     /// </summary>
-    public class Genre : BaseItem
+    public class Genre : BaseItem, IItemByName
     {
         /// <summary>
         /// Gets the user data key.

MediaBrowser.Controller/Entities/IItemByName.cs

@@ -0,0 +1,10 @@
+
+namespace MediaBrowser.Controller.Entities
+{
+    /// <summary>
+    /// Marker interface
+    /// </summary>
+    public interface IItemByName
+    {
+    }
+}

MediaBrowser.Controller/Entities/Person.cs

@@ -4,7 +4,7 @@ namespace MediaBrowser.Controller.Entities
     /// <summary>
     /// This is the full Person object that can be retrieved with all of it's data.
     /// </summary>
-    public class Person : BaseItem
+    public class Person : BaseItem, IItemByName
     {
         /// <summary>
         /// Gets the user data key.

MediaBrowser.Controller/Entities/Studio.cs

@@ -4,7 +4,7 @@ namespace MediaBrowser.Controller.Entities
     /// <summary>
     /// Class Studio
     /// </summary>
-    public class Studio : BaseItem
+    public class Studio : BaseItem, IItemByName
     {
         /// <summary>
         /// Gets the user data key.

MediaBrowser.Controller/Entities/Year.cs

@@ -4,7 +4,7 @@ namespace MediaBrowser.Controller.Entities
     /// <summary>
     /// Class Year
     /// </summary>
-    public class Year : BaseItem
+    public class Year : BaseItem, IItemByName
     {
         /// <summary>
         /// Gets the user data key.

MediaBrowser.Controller/MediaBrowser.Controller.csproj

@@ -76,6 +76,7 @@
     <Compile Include="Entities\Audio\MusicGenre.cs" />
     <Compile Include="Entities\Game.cs" />
     <Compile Include="Entities\IByReferenceItem.cs" />
+    <Compile Include="Entities\IItemByName.cs" />
     <Compile Include="Entities\MusicVideo.cs" />
     <Compile Include="Library\ILibraryPostScanTask.cs" />
     <Compile Include="Library\ILibraryPrescanTask.cs" />

MediaBrowser.Server.Implementations/Library/LibraryManager.cs

@@ -392,7 +392,10 @@ namespace MediaBrowser.Server.Implementations.Library
         /// <param name="item">The item.</param>
         private void UpdateItemInLibraryCache(BaseItem item)
         {
-            LibraryItemsCache.AddOrUpdate(item.Id, item, delegate { return item; });
+            if (!(item is IItemByName))
+            {
+                LibraryItemsCache.AddOrUpdate(item.Id, item, delegate { return item; });
+            }
         }
 
         /// <summary>