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388 lines (330 loc) · 10.6 KB
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/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
import { transformErrorForSerialization } from 'vs/base/common/errors';
import { Disposable, IDisposable } from 'vs/base/common/lifecycle';
import { isWeb } from 'vs/base/common/platform';
import * as types from 'vs/base/common/types';
const INITIALIZE = '$initialize';
export interface IWorker extends IDisposable {
getId(): number;
postMessage(message: any, transfer: ArrayBuffer[]): void;
}
export interface IWorkerCallback {
(message: any): void;
}
export interface IWorkerFactory {
create(moduleId: string, callback: IWorkerCallback, onErrorCallback: (err: any) => void): IWorker;
}
let webWorkerWarningLogged = false;
export function logOnceWebWorkerWarning(err: any): void {
if (!isWeb) {
// running tests
return;
}
if (!webWorkerWarningLogged) {
webWorkerWarningLogged = true;
console.warn('Could not create web worker(s). Falling back to loading web worker code in main thread, which might cause UI freezes. Please see https://github.com/microsoft/monaco-editor#faq');
}
console.warn(err.message);
}
interface IMessage {
vsWorker: number;
req?: string;
seq?: string;
}
interface IRequestMessage extends IMessage {
req: string;
method: string;
args: any[];
}
interface IReplyMessage extends IMessage {
seq: string;
err: any;
res: any;
}
interface IMessageReply {
resolve: (value?: any) => void;
reject: (error?: any) => void;
}
interface IMessageHandler {
sendMessage(msg: any, transfer?: ArrayBuffer[]): void;
handleMessage(method: string, args: any[]): Promise<any>;
}
class SimpleWorkerProtocol {
private _workerId: number;
private _lastSentReq: number;
private _pendingReplies: { [req: string]: IMessageReply; };
private _handler: IMessageHandler;
constructor(handler: IMessageHandler) {
this._workerId = -1;
this._handler = handler;
this._lastSentReq = 0;
this._pendingReplies = Object.create(null);
}
public setWorkerId(workerId: number): void {
this._workerId = workerId;
}
public sendMessage(method: string, args: any[]): Promise<any> {
let req = String(++this._lastSentReq);
return new Promise<any>((resolve, reject) => {
this._pendingReplies[req] = {
resolve: resolve,
reject: reject
};
this._send({
vsWorker: this._workerId,
req: req,
method: method,
args: args
});
});
}
public handleMessage(message: IMessage): void {
if (!message || !message.vsWorker) {
return;
}
if (this._workerId !== -1 && message.vsWorker !== this._workerId) {
return;
}
this._handleMessage(message);
}
private _handleMessage(msg: IMessage): void {
if (msg.seq) {
let replyMessage = <IReplyMessage>msg;
if (!this._pendingReplies[replyMessage.seq]) {
console.warn('Got reply to unknown seq');
return;
}
let reply = this._pendingReplies[replyMessage.seq];
delete this._pendingReplies[replyMessage.seq];
if (replyMessage.err) {
let err = replyMessage.err;
if (replyMessage.err.$isError) {
err = new Error();
err.name = replyMessage.err.name;
err.message = replyMessage.err.message;
err.stack = replyMessage.err.stack;
}
reply.reject(err);
return;
}
reply.resolve(replyMessage.res);
return;
}
let requestMessage = <IRequestMessage>msg;
let req = requestMessage.req;
let result = this._handler.handleMessage(requestMessage.method, requestMessage.args);
result.then((r) => {
this._send({
vsWorker: this._workerId,
seq: req,
res: r,
err: undefined
});
}, (e) => {
if (e.detail instanceof Error) {
// Loading errors have a detail property that points to the actual error
e.detail = transformErrorForSerialization(e.detail);
}
this._send({
vsWorker: this._workerId,
seq: req,
res: undefined,
err: transformErrorForSerialization(e)
});
});
}
private _send(msg: IRequestMessage | IReplyMessage): void {
let transfer: ArrayBuffer[] = [];
if (msg.req) {
const m = <IRequestMessage>msg;
for (let i = 0; i < m.args.length; i++) {
if (m.args[i] instanceof ArrayBuffer) {
transfer.push(m.args[i]);
}
}
} else {
const m = <IReplyMessage>msg;
if (m.res instanceof ArrayBuffer) {
transfer.push(m.res);
}
}
this._handler.sendMessage(msg, transfer);
}
}
export interface IWorkerClient<W> {
getProxyObject(): Promise<W>;
dispose(): void;
}
/**
* Main thread side
*/
export class SimpleWorkerClient<W extends object, H extends object> extends Disposable implements IWorkerClient<W> {
private readonly _worker: IWorker;
private readonly _onModuleLoaded: Promise<string[]>;
private readonly _protocol: SimpleWorkerProtocol;
private readonly _lazyProxy: Promise<W>;
constructor(workerFactory: IWorkerFactory, moduleId: string, host: H) {
super();
let lazyProxyReject: ((err: any) => void) | null = null;
this._worker = this._register(workerFactory.create(
'vs/base/common/worker/simpleWorker',
(msg: any) => {
this._protocol.handleMessage(msg);
},
(err: any) => {
// in Firefox, web workers fail lazily :(
// we will reject the proxy
if (lazyProxyReject) {
lazyProxyReject(err);
}
}
));
this._protocol = new SimpleWorkerProtocol({
sendMessage: (msg: any, transfer: ArrayBuffer[]): void => {
this._worker.postMessage(msg, transfer);
},
handleMessage: (method: string, args: any[]): Promise<any> => {
if (typeof (host as any)[method] !== 'function') {
return Promise.reject(new Error('Missing method ' + method + ' on main thread host.'));
}
try {
return Promise.resolve((host as any)[method].apply(host, args));
} catch (e) {
return Promise.reject(e);
}
}
});
this._protocol.setWorkerId(this._worker.getId());
// Gather loader configuration
let loaderConfiguration: any = null;
if (typeof (<any>self).require !== 'undefined' && typeof (<any>self).require.getConfig === 'function') {
// Get the configuration from the Monaco AMD Loader
loaderConfiguration = (<any>self).require.getConfig();
} else if (typeof (<any>self).requirejs !== 'undefined') {
// Get the configuration from requirejs
loaderConfiguration = (<any>self).requirejs.s.contexts._.config;
}
const hostMethods = types.getAllMethodNames(host);
// Send initialize message
this._onModuleLoaded = this._protocol.sendMessage(INITIALIZE, [
this._worker.getId(),
JSON.parse(JSON.stringify(loaderConfiguration)),
moduleId,
hostMethods,
]);
// Create proxy to loaded code
const proxyMethodRequest = (method: string, args: any[]): Promise<any> => {
return this._request(method, args);
};
this._lazyProxy = new Promise<W>((resolve, reject) => {
lazyProxyReject = reject;
this._onModuleLoaded.then((availableMethods: string[]) => {
resolve(types.createProxyObject<W>(availableMethods, proxyMethodRequest));
}, (e) => {
reject(e);
this._onError('Worker failed to load ' + moduleId, e);
});
});
}
public getProxyObject(): Promise<W> {
return this._lazyProxy;
}
private _request(method: string, args: any[]): Promise<any> {
return new Promise<any>((resolve, reject) => {
this._onModuleLoaded.then(() => {
this._protocol.sendMessage(method, args).then(resolve, reject);
}, reject);
});
}
private _onError(message: string, error?: any): void {
console.error(message);
console.info(error);
}
}
export interface IRequestHandler {
_requestHandlerBrand: any;
[prop: string]: any;
}
export interface IRequestHandlerFactory<H> {
(host: H): IRequestHandler;
}
/**
* Worker side
*/
export class SimpleWorkerServer<H extends object> {
private _requestHandlerFactory: IRequestHandlerFactory<H> | null;
private _requestHandler: IRequestHandler | null;
private _protocol: SimpleWorkerProtocol;
constructor(postMessage: (msg: any, transfer?: ArrayBuffer[]) => void, requestHandlerFactory: IRequestHandlerFactory<H> | null) {
this._requestHandlerFactory = requestHandlerFactory;
this._requestHandler = null;
this._protocol = new SimpleWorkerProtocol({
sendMessage: (msg: any, transfer: ArrayBuffer[]): void => {
postMessage(msg, transfer);
},
handleMessage: (method: string, args: any[]): Promise<any> => this._handleMessage(method, args)
});
}
public onmessage(msg: any): void {
this._protocol.handleMessage(msg);
}
private _handleMessage(method: string, args: any[]): Promise<any> {
if (method === INITIALIZE) {
return this.initialize(<number>args[0], <any>args[1], <string>args[2], <string[]>args[3]);
}
if (!this._requestHandler || typeof this._requestHandler[method] !== 'function') {
return Promise.reject(new Error('Missing requestHandler or method: ' + method));
}
try {
return Promise.resolve(this._requestHandler[method].apply(this._requestHandler, args));
} catch (e) {
return Promise.reject(e);
}
}
private initialize(workerId: number, loaderConfig: any, moduleId: string, hostMethods: string[]): Promise<string[]> {
this._protocol.setWorkerId(workerId);
const proxyMethodRequest = (method: string, args: any[]): Promise<any> => {
return this._protocol.sendMessage(method, args);
};
const hostProxy = types.createProxyObject<H>(hostMethods, proxyMethodRequest);
if (this._requestHandlerFactory) {
// static request handler
this._requestHandler = this._requestHandlerFactory(hostProxy);
return Promise.resolve(types.getAllMethodNames(this._requestHandler));
}
if (loaderConfig) {
// Remove 'baseUrl', handling it is beyond scope for now
if (typeof loaderConfig.baseUrl !== 'undefined') {
delete loaderConfig['baseUrl'];
}
if (typeof loaderConfig.paths !== 'undefined') {
if (typeof loaderConfig.paths.vs !== 'undefined') {
delete loaderConfig.paths['vs'];
}
}
// Since this is in a web worker, enable catching errors
loaderConfig.catchError = true;
(<any>self).require.config(loaderConfig);
}
return new Promise<string[]>((resolve, reject) => {
// Use the global require to be sure to get the global config
(<any>self).require([moduleId], (module: { create: IRequestHandlerFactory<H> }) => {
this._requestHandler = module.create(hostProxy);
if (!this._requestHandler) {
reject(new Error(`No RequestHandler!`));
return;
}
resolve(types.getAllMethodNames(this._requestHandler));
}, reject);
});
}
}
/**
* Called on the worker side
*/
export function create(postMessage: (msg: string) => void): SimpleWorkerServer<any> {
return new SimpleWorkerServer(postMessage, null);
}