Decoupled cache eviction from cache settings handler fixes #7958 (#7959)

src/Orchard.Web/Modules/Orchard.OutputCache/Handlers/CacheItemInvalidationHandler.cs

@@ -0,0 +1,33 @@
+using System.Globalization;
+using Orchard.ContentManagement;
+using Orchard.ContentManagement.Handlers;
+using Orchard.Core.Common.Models;
+using Orchard.OutputCache.Services;
+
+namespace Orchard.OutputCache.Handlers {
+    public class CacheItemInvalidationHandler : ContentHandler {
+        private readonly ICacheService _cacheService;
+
+        public CacheItemInvalidationHandler(ICacheService cacheService) {
+            _cacheService = cacheService;
+
+            // Evict cached content when updated, removed or destroyed.
+            OnPublished<IContent>((context, part) => Invalidate(part));
+            OnRemoved<IContent>((context, part) => Invalidate(part));
+            OnDestroyed<IContent>((context, part) => Invalidate(part));
+        }
+
+        private void Invalidate(IContent content) {
+            // Remove any item tagged with this content item ID.
+            _cacheService.RemoveByTag(content.ContentItem.Id.ToString(CultureInfo.InvariantCulture));
+
+            // Search the cache for containers too.
+            var commonPart = content.As<CommonPart>();
+            if (commonPart != null) {
+                if (commonPart.Container != null) {
+                    _cacheService.RemoveByTag(commonPart.Container.Id.ToString(CultureInfo.InvariantCulture));
+                }
+            }
+        }
+    }
+}

src/Orchard.Web/Modules/Orchard.OutputCache/Handlers/CacheSettingsPartHandler.cs

@@ -1,10 +1,7 @@
-using System;
+using System.Linq;
-using System.Globalization;
-using System.Linq;
 using System.Xml.Linq;
 using Orchard.ContentManagement;
 using Orchard.ContentManagement.Handlers;
-using Orchard.Core.Common.Models;
 using Orchard.OutputCache.Models;
 using Orchard.OutputCache.Services;
 
@@ -23,28 +20,10 @@ namespace Orchard.OutputCache.Handlers {
                 part.DefaultCacheGraceTime = 60;
             });
 
-            // Evict cached content when updated, removed or destroyed.
-            OnPublished<IContent>((context, part) => Invalidate(part));
-            OnRemoved<IContent>((context, part) => Invalidate(part));
-            OnDestroyed<IContent>((context, part) => Invalidate(part));
-
             OnExporting<CacheSettingsPart>(ExportRouteSettings);
             OnImporting<CacheSettingsPart>(ImportRouteSettings);
         }
 
-        private void Invalidate(IContent content) {
-            // Remove any item tagged with this content item ID.
-            _cacheService.RemoveByTag(content.ContentItem.Id.ToString(CultureInfo.InvariantCulture));
-
-            // Search the cache for containers too.
-            var commonPart = content.As<CommonPart>();
-            if (commonPart != null) {
-                if (commonPart.Container != null) {
-                    _cacheService.RemoveByTag(commonPart.Container.Id.ToString(CultureInfo.InvariantCulture));
-                }
-            }
-        }
-
         private void ExportRouteSettings(ExportContentContext context, CacheSettingsPart part) {
             var routes = _cacheService.GetRouteConfigs();
             var routesElement = new XElement("Routes",

src/Orchard.Web/Modules/Orchard.OutputCache/Orchard.OutputCache.csproj

@@ -107,6 +107,7 @@
     <Content Include="Web.config" />
     <Content Include="Scripts\Web.config" />
     <Content Include="Styles\Web.config" />
+    <Compile Include="Handlers\CacheItemInvalidationHandler.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Content Include="Module.txt" />
   </ItemGroup>
@@ -208,4 +209,4 @@
       </FlavorProperties>
     </VisualStudio>
   </ProjectExtensions>
-</Project>
+</Project>