parallel-es/src/browser/worker/browser-worker-thread-factory.ts

Simple parallelization for EcmaScript

import {IWorkerThreadFactory} from "../../common/worker/worker-thread-factory";
import {IWorkerThread} from "../../common/worker/worker-thread";
import {DynamicFunctionRegistry} from "../../common/function/dynamic-function-registry";
import {WebWorkerThreadSlaveCommunicationChannel} from "./web-worker-thread-slave-communication-channel";
import {DefaultWorkerThread} from "../../common/worker/default-worker-thread";

declare function require(module: string): any;
/* tslint:disable:no-var-requires */
const SlaveWorker = require("worker-loader?name=worker-slave!../worker-slave");

/**
 * Thread factory that creates web worker based threads using {@link BrowserWorkerThread}.
 */
export class BrowserWorkerThreadFactory implements IWorkerThreadFactory {
    constructor(private functionLookupTable: DynamicFunctionRegistry) {}

    public spawn(): IWorkerThread {
        if (!(window as any)["Worker"]) {
            throw new Error("Missing Web Worker support");
        }

        const webWorker = new SlaveWorker();
        const workerThread = new DefaultWorkerThread(this.functionLookupTable, new WebWorkerThreadSlaveCommunicationChannel(webWorker));
        workerThread.initialize();
        return workerThread;
    }
}