Prevents the index to be accessed when it is rebuilt

Also call UpdateIndex() to take the rebuilt index into account immediately

--HG--
branch : dev

src/Orchard.Web/Core/Indexing/Lucene/DefaultSearchBuilder.cs

@@ -155,7 +155,16 @@ namespace Orchard.Core.Indexing.Lucene {
         public IEnumerable<ISearchHit> Search() {
             var query = CreateQuery();
 
-            var searcher = new IndexSearcher(_directory, true);
+            IndexSearcher searcher;
+
+            try {
+                searcher = new IndexSearcher(_directory, true);
+            }
+            catch {
+                // index might not exist if it has been rebuilt
+                Logger.Information("Attempt to read a none existing index");
+                return Enumerable.Empty<ISearchHit>();
+            }
 
             try {
                 var sort = String.IsNullOrEmpty(_sort)
@@ -188,8 +197,17 @@ namespace Orchard.Core.Indexing.Lucene {
 
         public int Count() {
             var query = CreateQuery();
+            IndexSearcher searcher;
+            
+            try {
+                 searcher = new IndexSearcher(_directory, true);
+            }
+            catch {
+                // index might not exist if it has been rebuilt
+                Logger.Information("Attempt to read a none existing index");
+                return 0;
+            }
 
-            var searcher = new IndexSearcher(_directory, true);
             try {
                 var hits = searcher.Search(query, Int16.MaxValue);
                 Logger.Information("Search results: {0}", hits.scoreDocs.Length);

src/Orchard.Web/Modules/Orchard.Search/Controllers/AdminController.cs

@@ -43,6 +43,7 @@ namespace Orchard.Search.Controllers {
                 return new HttpUnauthorizedResult();
 
             _searchService.RebuildIndex();
+            _searchService.UpdateIndex();
 
             return RedirectToAction("Index");
         }

src/Orchard.Web/Modules/Orchard.Search/Services/SearchService.cs

@@ -63,6 +63,7 @@ namespace Orchard.Search.Services
                 searchProvider.DeleteIndex(SearchIndexName);
 
             searchProvider.CreateIndex(SearchIndexName); // or just reset the updated date and let the background process recreate the index
+
             Services.Notifier.Information(T("The search index has been rebuilt."));
         }