watchdog-timer/dist/factories/createWatchdogTimer.js

Detects and notifies when program does not check-in within a timeout.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;

var _Logger = _interopRequireDefault(require("../Logger"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

const createWatchdogTimer = configuration => {
  let consequentTimeouts = 0;
  let timeoutId;

  const routine = () => {
    timeoutId = setTimeout(() => {
      consequentTimeouts++;

      _Logger.default.error('watchdog timer timeout');

      configuration.onTimeout({
        consequentTimeouts
      });

      if (timeoutId) {
        routine();
      }
    }, configuration.timeout); // $FlowFixMe

    timeoutId.unref();
  };

  routine();

  const destroy = () => {
    if (!timeoutId) {
      _Logger.default.warn('watchdog timer has been already destroyed');

      return;
    }

    _Logger.default.trace('watchdog timer has been destroyed');

    clearTimeout(timeoutId);
    timeoutId = undefined;
  };

  const reset = () => {
    if (!timeoutId) {
      _Logger.default.warn('watchdog timer has been already destroyed');

      return;
    }

    consequentTimeouts = 0;

    _Logger.default.trace('watchdog timer has been reset'); // $FlowFixMe


    timeoutId.refresh();
  };

  return {
    destroy,
    reset
  };
};

var _default = createWatchdogTimer;
exports.default = _default;
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