@thi.ng/rstream/worker.js

Reactive streams & subscription primitives for constructing dataflow graphs / pipelines

import { defWorker } from "./defworker.js";
import { __optsWithID } from "./idgen.js";
import { LOGGER } from "./logger.js";
import { stream } from "./stream.js";
const fromWorker = (worker, opts) => {
  const _worker = defWorker(worker);
  opts = __optsWithID("worker", opts);
  return stream((stream2) => {
    const msgListener = (e) => {
      stream2.next(e.data);
    };
    const errListener = (e) => {
      stream2.error(e.data);
    };
    _worker.addEventListener("message", msgListener);
    _worker.addEventListener("error", errListener);
    return () => {
      _worker.removeEventListener("message", msgListener);
      _worker.removeEventListener("error", errListener);
      if (opts.terminate !== false) {
        LOGGER.info("terminating worker", _worker);
        _worker.terminate();
      }
    };
  }, opts);
};
export {
  fromWorker
};