ambari/ambari-web/app/controllers/main/admin/highAvailability_controller.js

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

var App = require('app');

App.MainAdminHighAvailabilityController = Em.Controller.extend({
  name: 'mainAdminHighAvailabilityController',

  tag: null,

  dataIsLoaded: false,

  /**
   * enable High Availability
   * @return {Boolean}
   */
  enableHighAvailability: function () {
    var message = [];
    var hostComponents = App.HostComponent.find();

    if (hostComponents.findProperty('componentName', 'NAMENODE').get('workStatus') !== 'STARTED') {
      message.push(Em.I18n.t('admin.highAvailability.error.namenodeStarted'));
    }
    if (hostComponents.filterProperty('componentName', 'ZOOKEEPER_SERVER').length < 3) {
      message.push(Em.I18n.t('admin.highAvailability.error.zooKeeperNum'));
    }

    if (App.router.get('mainHostController.hostsCountMap.TOTAL') < 3) {
      message.push(Em.I18n.t('admin.highAvailability.error.hostsNum'));
    }
    if (message.length > 0) {
      this.showErrorPopup(message);
      return false;
    }
    App.router.transitionTo('main.services.enableHighAvailability');
    return true;
  },

  disableHighAvailability: function () {
    App.router.transitionTo('main.admin.rollbackHighAvailability');
  },

  /**
   * enable ResourceManager High Availability
   * @return {Boolean}
   */
  enableRMHighAvailability: function () {
    //Prerequisite Checks
    var message = [];
    if (App.HostComponent.find().filterProperty('componentName', 'ZOOKEEPER_SERVER').length < 3) {
      message.push(Em.I18n.t('admin.rm_highAvailability.error.zooKeeperNum'));
    }

    if (App.router.get('mainHostController.hostsCountMap.TOTAL') < 3) {
      message.push(Em.I18n.t('admin.rm_highAvailability.error.hostsNum'));
    }
    if (message.length > 0) {
      this.showErrorPopup(message);
      return false;
    }
    App.router.transitionTo('main.services.enableRMHighAvailability');
    return true;
  },

  /**
   * join or wrap message depending on whether it is array or string
   * @param message
   * @return {*}
   */
  joinMessage: function (message) {
    if (Array.isArray(message)) {
      return message.join('<br/>');
    } else {
      return '<p>' + message + '</p>';
    }
  },

  showErrorPopup: function (message) {
    message = this.joinMessage(message);
    App.ModalPopup.show({
      header: Em.I18n.t('common.error'),
      bodyClass: Ember.View.extend({
        template: Ember.Handlebars.compile(message)
      }),
      secondary: false
    });
  }
});