@tvkitchen/countertop/dist/classes/Countertop.js

The entry point for developers who want to set up a TV Kitchen.

"use strict";

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

var _kafkajs = require("kafkajs");

var _constants = require("../constants");

var _loggers = require("../tools/loggers");

var _CountertopStation = _interopRequireDefault(require("./CountertopStation"));

var _CountertopTopology = _interopRequireDefault(require("./CountertopTopology"));

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

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

/**
 * The Countertop sets up and monitors stations for registered appliances to ensure the proper
 * flow and processing of data.
 *
 * It is also responsible for emitting information and serving as the entry and exit point of
 * the countertop architecture.
 */
class Countertop {
  /**
   * @param  {Logger} options.logger        A logger with methods for all TV Kitchen logLevels.
   * @param  {Object} options.kafkaSettings Kafka settings as defined in the KafkaJS library.
   */
  constructor({
    logger = _loggers.silentLogger,
    kafkaSettings = {}
  } = {}) {
    _defineProperty(this, "logger", null);

    _defineProperty(this, "kafka", null);

    _defineProperty(this, "stations", []);

    _defineProperty(this, "state", '');

    _defineProperty(this, "addAppliance", (Appliance, applianceSettings = {}) => {
      this.logger.trace('CountertopCoordinator: addAppliance()');

      if (this.getState() !== _constants.countertopStates.STOPPED) {
        throw new Error('The Countertop must be stopped in order to add an Appliance.');
      }

      const station = new _CountertopStation.default(Appliance, applianceSettings, {
        logger: this.logger,
        kafka: this.kafka
      });
      this.stations.push(station);
      this.updateTopology();
      return station;
    });

    _defineProperty(this, "start", async () => {
      this.logger.trace('CountertopCoordinator: start()');
      this.setState(_constants.countertopStates.STARTING);
      const promises = this.stations.map(station => station.start());
      const started = (await Promise.all(promises)).every(result => result);
      this.setState(started ? _constants.countertopStates.STARTED : _constants.countertopStates.ERRORED);
      return this.getState() === _constants.countertopStates.STARTED;
    });

    _defineProperty(this, "stop", async () => {
      this.logger.trace('CountertopCoordinator: stop()');
      this.setState(_constants.countertopStates.STOPPING);
      this.stations.map(station => station.stop());
      const promises = this.stations.map(async station => station.stop());
      const stopped = (await Promise.all(promises)).every(result => result);
      this.setState(stopped ? _constants.countertopStates.STOPPED : _constants.countertopStates.ERRORED);
      return this.getState() === _constants.countertopStates.STOPPED;
    });

    _defineProperty(this, "updateTopology", () => {
      this.logger.trace('CountertopCoordinator: updateTopology()');

      if (this.state !== _constants.countertopStates.STOPPED) {
        throw new Error('The Countertop must be stopped in order to update topology.');
      }

      const topology = new _CountertopTopology.default(this.stations);
      this.stations.map(station => station.invokeTopology(topology));
      return topology;
    });

    _defineProperty(this, "getState", () => this.state);

    _defineProperty(this, "setState", state => {
      this.state = state;
    });

    _defineProperty(this, "on", (eventType, listener) => {
      this.stations.forEach(station => station.on(eventType, listener));
      return this;
    });

    this.logger = logger;
    this.setState(_constants.countertopStates.STOPPED);
    this.kafka = new _kafkajs.Kafka({
      brokers: ['127.0.0.1:9092'],
      ...kafkaSettings
    });
  }
  /**
   * Register a new, configured appliance into the countertop.
   * Appliances that ingest Payload streams may be cloned as new streams are created.
   *
   * @param  {Class}  Appliance         The class of the IAppliance being registered.
   * @param  {Object} applianceSettings The settings to be passed to the appliance.
   * @return {CountertopStation}        The station created for this appliance.
   */


}

var _default = Countertop;
exports.default = _default;