From 9e4f119bc679e0d5546ec35b6ba87f8b473c4df1 Mon Sep 17 00:00:00 2001
From: ikiw <mynameissakthi@gmail.com>
Date: Tue, 25 Feb 2020 23:43:47 +0530
Subject: [PATCH] Refactor PR #7879 to use throttler

---
 packages/docmanager-extension/package.json |  1 +
 packages/docmanager-extension/src/index.ts | 14 ++++++--------
 2 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/packages/docmanager-extension/package.json b/packages/docmanager-extension/package.json
index 00319de75ee2..218f3f630d54 100644
--- a/packages/docmanager-extension/package.json
+++ b/packages/docmanager-extension/package.json
@@ -48,6 +48,7 @@
     "@lumino/algorithm": "^1.2.3",
     "@lumino/coreutils": "^1.4.2",
     "@lumino/disposable": "^1.3.5",
+    "@lumino/polling": "^1.0.4",
     "@lumino/widgets": "^1.11.1"
   },
   "devDependencies": {
diff --git a/packages/docmanager-extension/src/index.ts b/packages/docmanager-extension/src/index.ts
index a73280981442..92e0b4811672 100644
--- a/packages/docmanager-extension/src/index.ts
+++ b/packages/docmanager-extension/src/index.ts
@@ -44,6 +44,8 @@ import { IDisposable } from '@lumino/disposable';
 
 import { Widget } from '@lumino/widgets';
 
+import { Throttler } from '@lumino/polling';
+
 /**
  * The command IDs used by the document manager plugin.
  */
@@ -244,15 +246,11 @@ ${fileTypes}`;
 
     // callback to registry change that ensures not to invoke reload method when there is already a promise that is pending
     let reloadSettingsRegistry = () => {
-      let promisePending = false;
+      let reloadThrottle = new Throttler(() =>
+        settingRegistry.reload(pluginId)
+      );
 
-      return async () => {
-        if (!promisePending) {
-          promisePending = true;
-          await settingRegistry.reload(pluginId);
-          promisePending = false;
-        }
-      };
+      return reloadThrottle.invoke.bind(reloadThrottle);
     };
 
     // If the document registry gains or loses a factory or file type,