ambari/ambari-web/app/controllers/main/host/addHost/step4_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.AddHostStep4Controller= Em.Controller.extend({

  name:"addHostStep4Controller",
  isConfigGroupLoaded: false,

  loadConfigGroups: function () {
    App.ajax.send({
      name: 'config_groups.all_fields',
      sender: this,
      success: 'successLoadingConfigGroup',
      error: 'errorLoadingConfigGroup'
    });
  },

  successLoadingConfigGroup: function (data) {
    App.router.get('addHostController.content').set('configGroups',data.items);
    this.set('isConfigGroupLoaded', true);
  },

  errorLoadingConfigGroup: function(data) {
    App.router.get('addHostController.content').set('configGroups', []);
    this.set('isConfigGroupLoaded', true);
  },

  configGroupsLoading: function () {
    var df = $.Deferred();
    if (this.get('isConfigGroupLoaded')) {
      df.resolve();
    } else {
      this.interval = setInterval(function () {
        if (this.get('isConfigGroupLoaded')) {
          df.resolve();
          clearInterval(this.interval);
        }
      }.bind(this), 55);
    }
    return df.promise();
  }

});