Fixes: U4-4873 RuntimeCacheRefresher does not remove items when media or content requires cache refreshing & U4-4871 Synced media indexes between load balanced servers do not sync all properties

src/Umbraco.Web/Cache/MediaCacheRefresher.cs

@@ -7,6 +7,7 @@ using Umbraco.Core.Cache;
 using Umbraco.Core.Events;
 using Umbraco.Core.IO;
 using Umbraco.Core.Models;
+using Umbraco.Core.Persistence.Caching;
 using umbraco.interfaces;
 using System.Linq;
 
@@ -155,6 +156,7 @@ namespace Umbraco.Web.Cache
 
             payloads.ForEach(payload =>
                 {
+
                     //if there's no path, then just use id (this will occur on permanent deletion like emptying recycle bin)
                     if (payload.Path.IsNullOrWhiteSpace())
                     {
@@ -165,6 +167,12 @@ namespace Umbraco.Web.Cache
                     {
                         foreach (var idPart in payload.Path.Split(','))
                         {
+                            int idPartAsInt;
+                            if (int.TryParse(idPart, out idPartAsInt))
+                            {
+                                RuntimeCacheProvider.Current.Delete(typeof(IMedia), idPartAsInt);    
+                            }
+
                             ApplicationContext.Current.ApplicationCache.ClearCacheByKeySearch(
                                 string.Format("{0}_{1}_True", CacheKeys.MediaCacheKey, idPart));
 

src/Umbraco.Web/Cache/UnpublishedPageCacheRefresher.cs

@@ -3,22 +3,16 @@ using System.Web.Script.Serialization;
 using Umbraco.Core.Cache;
 using Umbraco.Core.Models;
 using System.Linq;
+using Umbraco.Core.Persistence.Caching;
 using Umbraco.Core.Sync;
 
 namespace Umbraco.Web.Cache
 {
     /// <summary>
-    /// A cache refresher used for non-published content, this is primarily to notify Examine indexes to update
+    /// A cache refresher used for non-published content, this is primarily to notify Examine indexes to update and to refresh the RuntimeCacheRefresher
     /// </summary>
     public sealed class UnpublishedPageCacheRefresher : TypedCacheRefresherBase<UnpublishedPageCacheRefresher, IContent>, IJsonCacheRefresher
     {
-
-        //NOTE: There is no functionality for this cache refresher, it is here simply to emit events on each server for which examine
-        // binds to. We could put the Examine index functionality in here but we've kept it all in the ExamineEvents class so that all of 
-        // the logic is in one place. In the future we may put the examine logic in a cache refresher instead (that would make sense) but we'd
-        // want to get this done before making more cache refreshers: 
-        // http://issues.umbraco.org/issue/U4-2633
-
         protected override UnpublishedPageCacheRefresher Instance
         {
             get { return this; }
@@ -78,12 +72,48 @@ namespace Umbraco.Web.Cache
 
         #endregion
 
+        public override void RefreshAll()
+        {
+            RuntimeCacheProvider.Current.Clear(typeof(IContent));
+            base.RefreshAll();
+        }
+
+        public override void Refresh(int id)
+        {
+            RuntimeCacheProvider.Current.Delete(typeof(IContent), id);
+            base.Refresh(id);
+        }
+
+        public override void Remove(int id)
+        {
+            RuntimeCacheProvider.Current.Delete(typeof(IContent), id);
+            base.Remove(id);
+        }
+
+
+        public override void Refresh(IContent instance)
+        {
+            RuntimeCacheProvider.Current.Delete(typeof(IContent), instance.Id);
+            base.Refresh(instance);
+        }
+
+        public override void Remove(IContent instance)
+        {
+            RuntimeCacheProvider.Current.Delete(typeof(IContent), instance.Id);
+            base.Remove(instance);
+        }
+
         /// <summary>
         /// Implement the IJsonCacheRefresher so that we can bulk delete the cache based on multiple IDs for when the recycle bin is emptied
         /// </summary>
         /// <param name="jsonPayload"></param>
         public void Refresh(string jsonPayload)
         {
+            foreach (var payload in DeserializeFromJsonPayload(jsonPayload))
+            {
+                RuntimeCacheProvider.Current.Delete(typeof(IContent), payload.Id);
+            }
+
             OnCacheUpdated(Instance, new CacheRefresherEventArgs(jsonPayload, MessageType.RefreshByJson));
         }