Feature: Encapsulated dynamic imports with error boundary and suspense (#19128)

* Feature: Encapsulated dynamic imports with error boundary and suspense

* Refactor: Changes after PR review

* Align PageLoader and LoadingPlaceholder

* Updated loading failed UI abit

* Change Failed to Unable

public/app/core/components/PageLoader/PageLoader.tsx

@@ -1,4 +1,5 @@
 import React, { FC } from 'react';
+import { LoadingPlaceholder } from '@grafana/ui';
 
 interface Props {
   pageName?: string;
@@ -8,8 +9,7 @@ const PageLoader: FC<Props> = ({ pageName = '' }) => {
   const loadingText = `Loading ${pageName}...`;
   return (
     <div className="page-loader-wrapper">
-      <i className="page-loader-wrapper__spinner fa fa-spinner fa-spin" />
-      <div className="page-loader-wrapper__text">{loadingText}</div>
+      <LoadingPlaceholder text={loadingText} />
     </div>
   );
 };

public/app/core/components/SafeDynamicImport.tsx

@@ -0,0 +1,52 @@
+import React, { lazy, Suspense, FunctionComponent } from 'react';
+import { cx, css } from 'emotion';
+import { LoadingPlaceholder, ErrorBoundary, Button } from '@grafana/ui';
+
+export const LoadingChunkPlaceHolder: FunctionComponent = () => (
+  <div className={cx('preloader')}>
+    <LoadingPlaceholder text={'Loading...'} />
+  </div>
+);
+
+function getAlertPageStyle() {
+  return css`
+    width: 508px;
+    margin: 128px auto;
+  `;
+}
+
+export const SafeDynamicImport = (importStatement: Promise<any>) => ({ ...props }) => {
+  const LazyComponent = lazy(() => importStatement);
+  return (
+    <ErrorBoundary>
+      {({ error, errorInfo }) => {
+        if (!errorInfo) {
+          return (
+            <Suspense fallback={<LoadingChunkPlaceHolder />}>
+              <LazyComponent {...props} />
+            </Suspense>
+          );
+        }
+
+        return (
+          <div className={getAlertPageStyle()}>
+            <h2>Unable to find application file</h2>
+            <br />
+            <h2 className="page-heading">Grafana has likely been updated. Please try reloading the page.</h2>
+            <br />
+            <div className="gf-form-group">
+              <Button size={'md'} variant={'secondary'} icon="fa fa-repeat" onClick={() => window.location.reload()}>
+                Reload
+              </Button>
+            </div>
+            <details style={{ whiteSpace: 'pre-wrap' }}>
+              {error && error.toString()}
+              <br />
+              {errorInfo.componentStack}
+            </details>
+          </div>
+        );
+      }}
+    </ErrorBoundary>
+  );
+};

public/app/routes/routes.ts

@@ -1,7 +1,6 @@
 import './dashboard_loaders';
 import './ReactContainer';
 import { applyRouteRegistrationHandlers } from './registry';
-
 // Pages
 import CreateFolderCtrl from 'app/features/folders/CreateFolderCtrl';
 import FolderDashboardsCtrl from 'app/features/folders/FolderDashboardsCtrl';
@@ -10,10 +9,10 @@ import LdapPage from 'app/features/admin/ldap/LdapPage';
 import LdapUserPage from 'app/features/admin/ldap/LdapUserPage';
 import config from 'app/core/config';
 import { route, ILocationProvider } from 'angular';
-
 // Types
 import { DashboardRouteInfo } from 'app/types';
 import { LoginPage } from 'app/core/components/Login/LoginPage';
+import { SafeDynamicImport } from '../core/components/SafeDynamicImport';
 
 /** @ngInject */
 export function setupAngularRoutes($routeProvider: route.IRouteProvider, $locationProvider: ILocationProvider) {
@@ -23,7 +22,7 @@ export function setupAngularRoutes($routeProvider: route.IRouteProvider, $locati
   // ones. That means angular ones could be navigated to in case there is a client side link some where.
 
   const importDashboardPage = () =>
-    import(/* webpackChunkName: "DashboardPage" */ '../features/dashboard/containers/DashboardPage');
+    SafeDynamicImport(import(/* webpackChunkName: "DashboardPage" */ '../features/dashboard/containers/DashboardPage'));
 
   $routeProvider
     .when('/', {
@@ -79,7 +78,9 @@ export function setupAngularRoutes($routeProvider: route.IRouteProvider, $locati
       reloadOnSearch: false,
       resolve: {
         component: () =>
-          import(/* webpackChunkName: "SoloPanelPage" */ '../features/dashboard/containers/SoloPanelPage'),
+          SafeDynamicImport(
+            import(/* webpackChunkName: "SoloPanelPage" */ '../features/dashboard/containers/SoloPanelPage')
+          ),
       },
     })
     .when('/dashboard-solo/:type/:slug', {
@@ -89,7 +90,9 @@ export function setupAngularRoutes($routeProvider: route.IRouteProvider, $locati
       reloadOnSearch: false,
       resolve: {
         component: () =>
-          import(/* webpackChunkName: "SoloPanelPage" */ '../features/dashboard/containers/SoloPanelPage'),
+          SafeDynamicImport(
+            import(/* webpackChunkName: "SoloPanelPage" */ '../features/dashboard/containers/SoloPanelPage')
+          ),
       },
     })
     .when('/dashboard/import', {
@@ -101,7 +104,9 @@ export function setupAngularRoutes($routeProvider: route.IRouteProvider, $locati
       template: '<react-container />',
       resolve: {
         component: () =>
-          import(/* webpackChunkName: "DataSourcesListPage"*/ 'app/features/datasources/DataSourcesListPage'),
+          SafeDynamicImport(
+            import(/* webpackChunkName: "DataSourcesListPage"*/ 'app/features/datasources/DataSourcesListPage')
+          ),
       },
     })
     .when('/datasources/edit/:id/', {
@@ -109,20 +114,27 @@ export function setupAngularRoutes($routeProvider: route.IRouteProvider, $locati
       reloadOnSearch: false, // for tabs
       resolve: {
         component: () =>
-          import(/* webpackChunkName: "DataSourceSettingsPage"*/ '../features/datasources/settings/DataSourceSettingsPage'),
+          SafeDynamicImport(
+            import(/* webpackChunkName: "DataSourceSettingsPage"*/ '../features/datasources/settings/DataSourceSettingsPage')
+          ),
       },
     })
     .when('/datasources/edit/:id/dashboards', {
       template: '<react-container />',
       resolve: {
         component: () =>
-          import(/* webpackChunkName: "DataSourceDashboards"*/ 'app/features/datasources/DataSourceDashboards'),
+          SafeDynamicImport(
+            import(/* webpackChunkName: "DataSourceDashboards"*/ 'app/features/datasources/DataSourceDashboards')
+          ),
       },
     })
     .when('/datasources/new', {
       template: '<react-container />',
       resolve: {
-        component: () => import(/* webpackChunkName: "NewDataSourcePage"*/ '../features/datasources/NewDataSourcePage'),
+        component: () =>
+          SafeDynamicImport(
+            import(/* webpackChunkName: "NewDataSourcePage"*/ '../features/datasources/NewDataSourcePage')
+          ),
       },
     })
     .when('/dashboards', {
@@ -138,13 +150,19 @@ export function setupAngularRoutes($routeProvider: route.IRouteProvider, $locati
     .when('/dashboards/f/:uid/:slug/permissions', {
       template: '<react-container />',
       resolve: {
-        component: () => import(/* webpackChunkName: "FolderPermissions"*/ 'app/features/folders/FolderPermissions'),
+        component: () =>
+          SafeDynamicImport(
+            import(/* webpackChunkName: "FolderPermissions"*/ 'app/features/folders/FolderPermissions')
+          ),
       },
     })
     .when('/dashboards/f/:uid/:slug/settings', {
       template: '<react-container />',
       resolve: {
-        component: () => import(/* webpackChunkName: "FolderSettingsPage"*/ 'app/features/folders/FolderSettingsPage'),
+        component: () =>
+          SafeDynamicImport(
+            import(/* webpackChunkName: "FolderSettingsPage"*/ 'app/features/folders/FolderSettingsPage')
+          ),
       },
     })
     .when('/dashboards/f/:uid/:slug', {
@@ -162,7 +180,7 @@ export function setupAngularRoutes($routeProvider: route.IRouteProvider, $locati
       reloadOnSearch: false,
       resolve: {
         roles: () => (config.viewersCanEdit ? [] : ['Editor', 'Admin']),
-        component: () => import(/* webpackChunkName: "explore" */ 'app/features/explore/Wrapper'),
+        component: () => SafeDynamicImport(import(/* webpackChunkName: "explore" */ 'app/features/explore/Wrapper')),
       },
     })
     .when('/a/:pluginId/', {
@@ -170,13 +188,15 @@ export function setupAngularRoutes($routeProvider: route.IRouteProvider, $locati
       template: '<react-container />',
       reloadOnSearch: false,
       resolve: {
-        component: () => import(/* webpackChunkName: "AppRootPage" */ 'app/features/plugins/AppRootPage'),
+        component: () =>
+          SafeDynamicImport(import(/* webpackChunkName: "AppRootPage" */ 'app/features/plugins/AppRootPage')),
       },
     })
     .when('/org', {
       template: '<react-container />',
       resolve: {
-        component: () => import(/* webpackChunkName: "OrgDetailsPage" */ '../features/org/OrgDetailsPage'),
+        component: () =>
+          SafeDynamicImport(import(/* webpackChunkName: "OrgDetailsPage" */ '../features/org/OrgDetailsPage')),
       },
     })
     .when('/org/new', {
@@ -186,7 +206,8 @@ export function setupAngularRoutes($routeProvider: route.IRouteProvider, $locati
     .when('/org/users', {
       template: '<react-container />',
       resolve: {
-        component: () => import(/* webpackChunkName: "UsersListPage" */ 'app/features/users/UsersListPage'),
+        component: () =>
+          SafeDynamicImport(import(/* webpackChunkName: "UsersListPage" */ 'app/features/users/UsersListPage')),
       },
     })
     .when('/org/users/invite', {
@@ -198,14 +219,15 @@ export function setupAngularRoutes($routeProvider: route.IRouteProvider, $locati
       template: '<react-container />',
       resolve: {
         roles: () => ['Editor', 'Admin'],
-        component: () => import(/* webpackChunkName: "ApiKeysPage" */ 'app/features/api-keys/ApiKeysPage'),
+        component: () =>
+          SafeDynamicImport(import(/* webpackChunkName: "ApiKeysPage" */ 'app/features/api-keys/ApiKeysPage')),
       },
     })
     .when('/org/teams', {
       template: '<react-container />',
       resolve: {
         roles: () => (config.editorsCanAdmin ? [] : ['Editor', 'Admin']),
-        component: () => import(/* webpackChunkName: "TeamList" */ 'app/features/teams/TeamList'),
+        component: () => SafeDynamicImport(import(/* webpackChunkName: "TeamList" */ 'app/features/teams/TeamList')),
       },
     })
     .when('/org/teams/new', {
@@ -217,7 +239,7 @@ export function setupAngularRoutes($routeProvider: route.IRouteProvider, $locati
       template: '<react-container />',
       resolve: {
         roles: () => (config.editorsCanAdmin ? [] : ['Admin']),
-        component: () => import(/* webpackChunkName: "TeamPages" */ 'app/features/teams/TeamPages'),
+        component: () => SafeDynamicImport(import(/* webpackChunkName: "TeamPages" */ 'app/features/teams/TeamPages')),
       },
     })
     .when('/profile', {
@@ -228,7 +250,10 @@ export function setupAngularRoutes($routeProvider: route.IRouteProvider, $locati
     .when('/profile/password', {
       template: '<react-container />',
       resolve: {
-        component: () => import(/* webPackChunkName: "ChangePasswordPage" */ 'app/features/profile/ChangePasswordPage'),
+        component: () =>
+          SafeDynamicImport(
+            import(/* webPackChunkName: "ChangePasswordPage" */ 'app/features/profile/ChangePasswordPage')
+          ),
       },
     })
     .when('/profile/select-org', {
@@ -278,7 +303,8 @@ export function setupAngularRoutes($routeProvider: route.IRouteProvider, $locati
     .when('/admin/stats', {
       template: '<react-container />',
       resolve: {
-        component: () => import(/* webpackChunkName: "ServerStats" */ 'app/features/admin/ServerStats'),
+        component: () =>
+          SafeDynamicImport(import(/* webpackChunkName: "ServerStats" */ 'app/features/admin/ServerStats')),
       },
     })
     .when('/admin/ldap', {
@@ -323,14 +349,16 @@ export function setupAngularRoutes($routeProvider: route.IRouteProvider, $locati
     .when('/plugins', {
       template: '<react-container />',
       resolve: {
-        component: () => import(/* webpackChunkName: "PluginListPage" */ 'app/features/plugins/PluginListPage'),
+        component: () =>
+          SafeDynamicImport(import(/* webpackChunkName: "PluginListPage" */ 'app/features/plugins/PluginListPage')),
       },
     })
     .when('/plugins/:pluginId/', {
       template: '<react-container />',
       reloadOnSearch: false, // tabs from query parameters
       resolve: {
-        component: () => import(/* webpackChunkName: "PluginPage" */ '../features/plugins/PluginPage'),
+        component: () =>
+          SafeDynamicImport(import(/* webpackChunkName: "PluginPage" */ '../features/plugins/PluginPage')),
       },
     })
     .when('/plugins/:pluginId/page/:slug', {
@@ -350,7 +378,8 @@ export function setupAngularRoutes($routeProvider: route.IRouteProvider, $locati
       template: '<react-container />',
       reloadOnSearch: false,
       resolve: {
-        component: () => import(/* webpackChunkName: "AlertRuleList" */ 'app/features/alerting/AlertRuleList'),
+        component: () =>
+          SafeDynamicImport(import(/* webpackChunkName: "AlertRuleList" */ 'app/features/alerting/AlertRuleList')),
       },
     })
     .when('/alerting/notifications', {