srvoa/build/Service.js

Infrastructure for service oriented architecture.

/**
 * srvoa - soa infrastructure for node js
 *
 * @copyright   Copyright (c) 2015, Alrik Zachert
 * @license     https://gitlab.com/kermit-js/kermit/blob/support/srvoa/LICENSE BSD-2-Clause
 */

"use strict";

var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();

var _get = function get(_x, _x2, _x3) { var _again = true; _function: while (_again) { var object = _x, property = _x2, receiver = _x3; desc = parent = getter = undefined; _again = false; if (object === null) object = Function.prototype; var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { _x = parent; _x2 = property; _x3 = receiver; _again = true; continue _function; } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } } };

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } }

function _inherits(subClass, superClass) { if (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }

var EventEmitter = require('events').EventEmitter,
    Config = require('./Config');

/**
 * Abstract class that defines the srvoa service interface.
 */

var Service = (function (_EventEmitter) {
  _inherits(Service, _EventEmitter);

  /**
   * The local reference to the service manager instance.
   *
   * @property serviceManager {ServiceManager}
   */

  /**
   * The config passed to configure as config service..
   *
   * @property serviceConfig {Config}
   */

  /**
   * Create a new service instance.
   *
   * @constructor
   * @param {ServiceManager} [serviceManager] - The service manager instance.
   */

  function Service(serviceManager) {
    _classCallCheck(this, Service);

    _get(Object.getPrototypeOf(Service.prototype), 'constructor', this).call(this);

    this.serviceManager = serviceManager || null;
    this.serviceConfig = null;
  }

  /**
   * Returns the service manager instance.
   *
   * @return {ServiceManager}
   */

  _createClass(Service, [{
    key: 'getServiceManager',
    value: function getServiceManager() {
      return this.serviceManager;
    }

    /**
     * Sets the service manager instance.
     *
     * @param   {ServiceManager} serviceManager
     * @return  {Service}
     */
  }, {
    key: 'setServiceManager',
    value: function setServiceManager(serviceManager) {
      this.serviceManager = serviceManager;

      return this;
    }

    /**
     * Configures the service.
     *
     * @param   {Object} [config]
     * @return  {Service}
     */
  }, {
    key: 'configure',
    value: function configure(config) {
      return this._applyConfig(config);
    }

    /**
     * Bootstrap the service logic.
     *
     * @return  {Service}
     */
  }, {
    key: 'bootstrap',
    value: function bootstrap() {
      return this;
    }

    /**
     * Launch the service logic.
     *
     * @return  {Service}
     */
  }, {
    key: 'launch',
    value: function launch() {
      return this;
    }

    /**
     * Return the default service config.
     *
     * @returns {Object|false}
     */
  }, {
    key: 'getDefaultServiceConfig',
    value: function getDefaultServiceConfig() {
      return false;
    }

    /**
     * Take a config hash and turn it into a config instance that is stored as `serviceConfig` property.
     * Before that the default service config is applied.
     *
     * @param config
     * @returns {Service}
     * @private
     */
  }, {
    key: '_applyConfig',
    value: function _applyConfig(config) {
      var defaultConfig = this.getDefaultServiceConfig();

      this.serviceConfig = new Config();

      if (defaultConfig !== false) {
        this.serviceConfig.setConfig(defaultConfig);
      }
      if (config) {
        this.serviceConfig.mergeConfig(config);
      }

      return this;
    }
  }]);

  return Service;
})(EventEmitter);

module.exports = Service;