Factoring out Alias updating logic to separate service so aliases can be refreshed not just from a background task.

src/Orchard.Web/Modules/Orchard.Alias/Implementation/Updater/AliasHolderUpdaterTask.cs

@@ -0,0 +1,40 @@
+using System;
+using System.Linq;
+using Orchard.Alias.Implementation.Holder;
+using Orchard.Alias.Implementation.Storage;
+using Orchard.Environment;
+using Orchard.Tasks;
+using Orchard.Logging;
+
+namespace Orchard.Alias.Implementation.Updater {
+    public class AliasHolderUpdaterTask : IOrchardShellEvents, IBackgroundTask {
+        private readonly IAliasHolderUpdater _aliasHolderUpdater;
+
+        public ILogger Logger { get; set; }
+
+        public AliasHolderUpdaterTask(IAliasHolderUpdater aliasHolderUpdater) {
+            _aliasHolderUpdater = aliasHolderUpdater;
+            Logger = NullLogger.Instance;
+        }
+
+        void IOrchardShellEvents.Activated() {
+            Refresh();
+        }
+
+        void IOrchardShellEvents.Terminating() {
+        }
+
+        private void Refresh() {
+            try {
+                _aliasHolderUpdater.Refresh();
+            }
+            catch (Exception ex) {
+                Logger.Error(ex, "Exception during Alias refresh");
+            }
+        }
+
+        public void Sweep() {
+            Refresh();
+        }
+    }
+}