diff --git a/js/script.js b/js/script.js
index 9eb1cb8..2c2d7a3 100644
--- a/js/script.js
+++ b/js/script.js
@@ -2,13 +2,23 @@
 	var nmcFilesActvityAction = (function () {
 		var delActvities = function() {
 			$('.del-files-activity').click(function(){
+				$(".del-files-activity button").attr("disabled", true);
 				$.ajax({
 					url: OC.generateUrl('/apps/nmc_files_activity/deleteActivitiesCustom'),
 					type: 'DELETE',
 					success: function(response, status, xhr) {
-						location.reload();
-					}
+						$(".del-files-activity button").attr("disabled", false);
+						var filter = 'all';
+						OC.Util.History.pushState({
+							filter: filter
+						});
+						OCA.Activity.Filter.setFilter(filter);
+					},
+					error: function (jqXHR, exception) {
+						$(".del-files-activity button").attr("disabled", false);
+					},
 				});
+
 			});
 		};
 
@@ -20,7 +30,7 @@
 		}
 	  })();
 
-	  nmcFilesActvityAction.delActvities();
+	 nmcFilesActvityAction.delActvities();
   });
 
 
diff --git a/lib/Controller/PageController.php b/lib/Controller/PageController.php
index 98bded6..0fb84cd 100644
--- a/lib/Controller/PageController.php
+++ b/lib/Controller/PageController.php
@@ -14,16 +14,42 @@
 use OCP\Activity\IManager;
 use OCP\DB\QueryBuilder\IQueryBuilder;
 use OCP\IDBConnection;
+use OCP\ICache;
+use OCP\ICacheFactory;
+use OCP\IURLGenerator;
+use OCP\ILogger;
+use OCP\IMemcache;
+use OC\Memcache\NullCache;
+
 class PageController extends Controller {
 	private $userId;
 
 	/** @var IDBConnection */
 	protected $connection;
 
-	public function __construct($AppName, IRequest $request, $UserId, IDBConnection $connection){
+	/** @var ICacheFactory */
+	private $cacheFactory;
+
+	/** @var IMemcache */
+	private $lockingCache;
+
+	/** @var IURLGenerator */
+	protected $urlGenerator;
+
+	/** @var ILogger */
+	protected $logger;
+
+	public function __construct($AppName, IRequest $request, $UserId, IDBConnection $connection, IURLGenerator $urlGenerator, ICacheFactory $cacheFactory, ILogger $logger,){
 		parent::__construct($AppName, $request);
 		$this->userId = $UserId;
 		$this->connection = $connection;
+		$this->urlGenerator = $urlGenerator;
+		$this->logger = $logger;
+		$lockingCache = $cacheFactory->createDistributed('Activity-locks');
+		if (!($lockingCache instanceof IMemcache)) {
+			$lockingCache = new NullCache();
+		}
+		$this->lockingCache = $lockingCache;
 	}
 
 
@@ -45,26 +71,30 @@ public function index() {
 	* @NoAdminRequired
 	*/
 	public function deleteActivitiesCustom() {
-		$sqlWhere = ' WHERE ' . " user='".$this->userId."'";
+		if (!$this->lockingCache->hasKey($this->userId)) {
+			$this->lockingCache->set($this->userId, 'locked', 10);
+			$this->logger->debug('***********Lock applied for 10 seconds***************', ['app' => 'nmc_files_activity']);
+			$sqlWhere = ' WHERE ' . " user='".$this->userId."'";
 
-		// Add galera safe delete chunking if using mysql
-		// Stops us hitting wsrep_max_ws_rows when large row counts are deleted
-		if ($this->connection->getDatabasePlatform() instanceof MySQLPlatform) {
-			// Then use chunked delete
-			$max = 100000;
-			$query = $this->connection->prepare(
-				'DELETE FROM `*PREFIX*activity`' . $sqlWhere . " LIMIT " . $max);
+			// Add galera safe delete chunking if using mysql
+			// Stops us hitting wsrep_max_ws_rows when large row counts are deleted
+			if ($this->connection->getDatabasePlatform() instanceof MySQLPlatform) {
+				// Then use chunked delete
+				$max = 100000;
+				$query = $this->connection->prepare(
+					'DELETE FROM `*PREFIX*activity`' . $sqlWhere . " LIMIT " . $max);
 
-			do {
+				do {
+					$query->execute();
+					$deleted = $query->rowCount();
+				} while ($deleted === $max);
+			} else {
+				// Dont use chunked delete - let the DB handle the large row count natively
+				$query = $this->connection->prepare(
+					'DELETE FROM `*PREFIX*activity`' . $sqlWhere);
 				$query->execute();
-				$deleted = $query->rowCount();
-			} while ($deleted === $max);
-		} else {
-			// Dont use chunked delete - let the DB handle the large row count natively
-			$query = $this->connection->prepare(
-				'DELETE FROM `*PREFIX*activity`' . $sqlWhere);
-			$query->execute();
+			}
+            $this->lockingCache->remove($this->userId);
 		}
 	}
-
 }