Switch to using Lumino polling package.

packages/application/package.json

@@ -49,6 +49,7 @@
     "@lumino/coreutils": "^1.3.1",
     "@lumino/disposable": "^1.3.0",
     "@lumino/messaging": "^1.3.0",
+    "@lumino/polling": "^1.0.1",
     "@lumino/properties": "^1.1.3",
     "@lumino/signaling": "^1.3.0",
     "@lumino/widgets": "^1.9.0",

packages/application/src/shell.ts

@@ -1,8 +1,6 @@
 // Copyright (c) Jupyter Development Team.
 // Distributed under the terms of the Modified BSD License.
 
-import { Debouncer } from '@jupyterlab/coreutils';
-
 import { DocumentRegistry } from '@jupyterlab/docregistry';
 
 import { DockPanelSvg, TabBarSvg } from '@jupyterlab/ui-components';
@@ -13,6 +11,8 @@ import { PromiseDelegate, Token } from '@lumino/coreutils';
 
 import { Message, MessageLoop, IMessageHandler } from '@lumino/messaging';
 
+import { Debouncer } from '@lumino/polling';
+
 import { ISignal, Signal } from '@lumino/signaling';
 
 import {

packages/apputils-extension/package.json

@@ -46,6 +46,7 @@
     "@lumino/commands": "^1.7.0",
     "@lumino/coreutils": "^1.3.1",
     "@lumino/disposable": "^1.3.0",
+    "@lumino/polling": "^1.0.1",
     "@lumino/widgets": "^1.9.0",
     "es6-promise": "~4.2.6"
   },

packages/apputils-extension/src/index.ts

@@ -9,6 +9,7 @@ import {
   JupyterFrontEnd,
   JupyterFrontEndPlugin
 } from '@jupyterlab/application';
+
 import {
   Dialog,
   ICommandPalette,
@@ -17,20 +18,21 @@ import {
   WindowResolver,
   Printing
 } from '@jupyterlab/apputils';
-import {
-  Debouncer,
-  IStateDB,
-  StateDB,
-  Throttler,
-  URLExt
-} from '@jupyterlab/coreutils';
+
+import { IStateDB, StateDB, URLExt } from '@jupyterlab/coreutils';
+
 import { defaultIconRegistry } from '@jupyterlab/ui-components';
 
 import { PromiseDelegate } from '@lumino/coreutils';
+
 import { DisposableDelegate } from '@lumino/disposable';
 
+import { Debouncer, Throttler } from '@lumino/polling';
+
 import { Palette } from './palette';
+
 import { settingsPlugin } from './settingsplugin';
+
 import { themesPlugin, themesPaletteMenuPlugin } from './themeplugins';
 
 /**

packages/codemirror/package.json

@@ -42,6 +42,7 @@
     "@lumino/commands": "^1.7.0",
     "@lumino/coreutils": "^1.3.1",
     "@lumino/disposable": "^1.3.0",
+    "@lumino/polling": "^1.0.1",
     "@lumino/signaling": "^1.3.0",
     "@lumino/widgets": "^1.9.0",
     "codemirror": "~5.47.0",

packages/codemirror/src/editor.ts

@@ -5,28 +5,26 @@
 
 import CodeMirror from 'codemirror';
 
-import { JSONExt } from '@lumino/coreutils';
-
-import { ArrayExt } from '@lumino/algorithm';
-
-import { IDisposable, DisposableDelegate } from '@lumino/disposable';
-
-import { Signal } from '@lumino/signaling';
-
 import { showDialog } from '@jupyterlab/apputils';
 
-import { Poll } from '@jupyterlab/coreutils';
-
 import { CodeEditor } from '@jupyterlab/codeeditor';
 
-import { UUID } from '@lumino/coreutils';
-
 import {
   IObservableMap,
   IObservableString,
   ICollaborator
 } from '@jupyterlab/observables';
 
+import { ArrayExt } from '@lumino/algorithm';
+
+import { JSONExt, UUID } from '@lumino/coreutils';
+
+import { Poll } from '@lumino/polling';
+
+import { IDisposable, DisposableDelegate } from '@lumino/disposable';
+
+import { Signal } from '@lumino/signaling';
+
 import { Mode } from './mode';
 
 import 'codemirror/addon/comment/comment.js';

packages/coreutils/src/index.ts

@@ -8,8 +8,6 @@ export * from './markdowncodeblocks';
 export * from './nbformat';
 export * from './pageconfig';
 export * from './path';
-export * from './poll';
-export * from './ratelimiter';
 export * from './restorablepool';
 export * from './settingregistry';
 export * from './statedb';

packages/coreutils/src/interfaces.ts

@@ -177,174 +177,6 @@ export interface IObjectPool<T extends IObservableDisposable>
   has(obj: T): boolean;
 }
 
-/**
- * A readonly poll that calls an asynchronous function with each tick.
- *
- * @typeparam T - The resolved type of the factory's promises.
- *
- * @typeparam U - The rejected type of the factory's promises.
- *
- * @typeparam V - The type to extend the phases supported by a poll.
- */
-export interface IPoll<T, U, V extends string> {
-  /**
-   * A signal emitted when the poll is disposed.
-   */
-  readonly disposed: ISignal<this, void>;
-
-  /**
-   * The polling frequency data.
-   */
-  readonly frequency: IPoll.Frequency;
-
-  /**
-   * Whether the poll is disposed.
-   */
-  readonly isDisposed: boolean;
-
-  /**
-   * The name of the poll.
-   */
-  readonly name: string;
-
-  /**
-   * The poll state, which is the content of the currently-scheduled poll tick.
-   */
-  readonly state: IPoll.State<T, U, V>;
-
-  /**
-   * A promise that resolves when the currently-scheduled tick completes.
-   *
-   * #### Notes
-   * Usually this will resolve after `state.interval` milliseconds from
-   * `state.timestamp`. It can resolve earlier if the user starts or refreshes the
-   * poll, etc.
-   */
-  readonly tick: Promise<IPoll<T, U, V>>;
-
-  /**
-   * A signal emitted when the poll state changes, i.e., a new tick is scheduled.
-   */
-  readonly ticked: ISignal<IPoll<T, U, V>, IPoll.State<T, U, V>>;
-}
-
-/**
- * A namespace for `IPoll` types.
- */
-export namespace IPoll {
-  /**
-   * The polling frequency parameters.
-   *
-   * #### Notes
-   * We implement the "decorrelated jitter" strategy from
-   * https://aws.amazon.com/blogs/architecture/exponential-backoff-and-jitter/.
-   * Essentially, if consecutive retries are needed, we choose an integer:
-   * `sleep = min(max, rand(interval, backoff * sleep))`
-   * This ensures that the poll is never less than `interval`, and nicely
-   * spreads out retries for consecutive tries. Over time, if (interval < max),
-   * the random number will be above `max` about (1 - 1/backoff) of the time
-   * (sleeping the `max`), and the rest of the time the sleep will be a random
-   * number below `max`, decorrelating our trigger time from other pollers.
-   */
-  export type Frequency = {
-    /**
-     * Whether poll frequency backs off (boolean) or the backoff growth rate
-     * (float > 1).
-     *
-     * #### Notes
-     * If `true`, the default backoff growth rate is `3`.
-     */
-    readonly backoff: boolean | number;
-
-    /**
-     * The basic polling interval in milliseconds (integer).
-     */
-    readonly interval: number;
-
-    /**
-     * The maximum milliseconds (integer) between poll requests.
-     */
-    readonly max: number;
-  };
-
-  /**
-   * The phase of the poll when the current tick was scheduled.
-   *
-   * @typeparam T - A type for any additional tick phases a poll supports.
-   */
-  export type Phase<T extends string> =
-    | T
-    | 'constructed'
-    | 'disposed'
-    | 'reconnected'
-    | 'refreshed'
-    | 'rejected'
-    | 'resolved'
-    | 'standby'
-    | 'started'
-    | 'stopped';
-
-  /**
-   * Definition of poll state at any given time.
-   *
-   * @typeparam T - The resolved type of the factory's promises.
-   *
-   * @typeparam U - The rejected type of the factory's promises.
-   *
-   * @typeparam V - The type to extend the phases supported by a poll.
-   */
-  export type State<T, U, V extends string> = {
-    /**
-     * The number of milliseconds until the current tick resolves.
-     */
-    readonly interval: number;
-
-    /**
-     * The payload of the last poll resolution or rejection.
-     *
-     * #### Notes
-     * The payload is `null` unless the `phase` is `'reconnected`, `'resolved'`,
-     * or `'rejected'`. Its type is `T` for resolutions and `U` for rejections.
-     */
-    readonly payload: T | U | null;
-
-    /**
-     * The current poll phase.
-     */
-    readonly phase: Phase<V>;
-
-    /**
-     * The timestamp for when this tick was scheduled.
-     */
-    readonly timestamp: number;
-  };
-}
-
-/**
- * A function whose invocations are rate limited and can be stopped after
- * invocation before it has fired.
- *
- * @typeparam T - The resolved type of the underlying function. Defaults to any.
- *
- * @typeparam U - The rejected type of the underlying function. Defaults to any.
- */
-export interface IRateLimiter<T = any, U = any> extends IDisposable {
-  /**
-   * The rate limit in milliseconds.
-   */
-  readonly limit: number;
-
-  /**
-   * Invoke the rate limited function.
-   */
-  invoke(): Promise<T>;
-
-  /**
-   * Stop the function if it is mid-flight.
-   */
-  stop(): Promise<void>;
-}
-
 /**
  * An interface for a state restorer.
  *