ambari/ambari-web/app/models/host.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');
var misc = require('utils/misc');

App.Host = DS.Model.extend({
  hostName: DS.attr('string'),
  publicHostName: DS.attr('string'),
  cluster: DS.belongsTo('App.Cluster'),
  hostComponents: DS.hasMany('App.HostComponent'),
  cpu: DS.attr('string'),
  memory: DS.attr('string'),
  diskTotal: DS.attr('number'),
  diskFree: DS.attr('number'),
  osArch: DS.attr('string'),
  ip: DS.attr('string'),
  rack: DS.attr('string'),
  healthStatus: DS.attr('string'),
  cpuUsage: DS.attr('number'),
  memoryUsage: DS.attr('number'),
  lastHeartBeatTime: DS.attr('number'),
  osType: DS.attr("string"),
  diskInfo: DS.attr('object'),
  loadOne:DS.attr('number'),
  loadFive:DS.attr('number'),
  loadFifteen:DS.attr('number'),

  criticalAlertsCount: function () {
    return App.router.get('clusterController.alerts').filterProperty('hostName', this.get('hostName')).filterProperty('isOk', false).filterProperty('ignoredForHosts', false).length;
  }.property('App.router.clusterController.alerts.length'),

  publicHostNameFormatted: function() {
    return this.get('publicHostName').substr(0, 20) + ' ...';
  }.property('publicHostName'),
  /**
   * API return diskTotal and diskFree. Need to save their different
   */
  diskUsed: function(){
    return this.get('diskTotal') - this.get('diskFree');
  }.property('diskFree', 'diskTotal'),
  /**
   * Format diskUsed value to float with 2 digits (also convert to GB)
   */
  diskUsedFormatted: function() {
    return Math.round(this.get('diskUsed') * Math.pow(10, 2)) / Math.pow(10, 2) + 'GB';
  }.property('diskUsed'),
  /**
   * Format diskTotal value to float with 2 digits (also convert to GB)
   */
  diskTotalFormatted: function() {
    return Math.round(this.get('diskTotal') * Math.pow(10, 2)) / Math.pow(10, 2) + 'GB';
  }.property('diskTotal'),
  /**
   * Percent value of used disk space
   */
  diskUsage: function() {
    return (this.get('diskUsed')) / this.get('diskTotal') * 100;
  }.property('diskUsed', 'diskTotal'),
  /**
   * Format diskUsage to float with 2 digits
   */
  diskUsageFormatted: function() {
    if (isNaN(this.get('diskUsage')) || this.get('diskUsage') < 0) {
      return 'Data Unavailable';
    }
    var s = Math.round(this.get('diskUsage') * Math.pow(10, 2)) / Math.pow(10, 2);
    if (isNaN(s)) {
      s = 0;
    }
    return s + '%';
  }.property('diskUsage'),

  diskInfoBar: function() {
    if (isNaN(this.get('diskUsage')) || this.get('diskUsage') < 0) {
      return this.get('diskUsageFormatted');
    }
    return this.get('diskUsedFormatted') + '/' + this.get('diskTotalFormatted') + ' (' + this.get('diskUsageFormatted')
      + ' ' + Em.I18n.t('services.service.summary.diskInfoBar.used') + ')';
  }.property('diskUsedFormatted', 'diskTotalFormatted'),
  /**
   * formatted bytes to appropriate value
   */
  memoryFormatted: function () {
    return misc.formatBandwidth(this.get('memory') * 1024);
  }.property('memory'),
  /**
   * Return true if the host has not sent heartbeat within the last 180 seconds
   */
  isNotHeartBeating : function() {
    return (App.testMode) ? false : ((new Date()).getTime() - this.get('lastHeartBeatTime')) > 180 * 1000;
  }.property('lastHeartBeatTime'),

  loadAvg: function() {
    if (this.get('loadOne') != null) return this.get('loadOne').toFixed(2);
    if (this.get('loadFive') != null) return this.get('loadFive').toFixed(2);
    if (this.get('loadFifteen') != null) return this.get('loadFifteen').toFixed(2);
  }.property('loadOne', 'loadFive', 'loadFifteen'),

  // Instead of making healthStatus a computed property that listens on hostComponents.@each.workStatus,
  // we are creating a separate observer _updateHealthStatus.  This is so that healthStatus is updated
  // only once after the run loop.  This is because Ember invokes the computed property every time
  // a property that it depends on changes.  For example, App.statusMapper's map function would invoke
  // the computed property too many times and freezes the UI without this hack.
  // See http://stackoverflow.com/questions/12467345/ember-js-collapsing-deferring-expensive-observers-or-computed-properties
  healthClass: '',

  _updateHealthClass: function(){
    Ember.run.once(this, 'updateHealthClass');
  }.observes('healthStatus', 'hostComponents.@each.workStatus'),

  updateHealthClass: function(){
    var healthStatus = this.get('healthStatus');
    /**
     * Do nothing until load
     */
    if (!this.get('isLoaded') || this.get('isSaving')) {
    } else {
      var status;
      var masterComponents = this.get('hostComponents').filterProperty('isMaster');
      var masterComponentsRunning = masterComponents.everyProperty('workStatus', App.HostComponentStatus.started);
      var slaveComponents = this.get('hostComponents').filterProperty('isSlave');
      var slaveComponentsRunning = slaveComponents.everyProperty('workStatus', App.HostComponentStatus.started);
      if (this.get('isNotHeartBeating') || healthStatus == 'UNKNOWN') {
        status = 'DEAD-YELLOW';
      } else if (masterComponentsRunning && slaveComponentsRunning) {
        status = 'LIVE';
      } else if (masterComponents.length > 0 && !masterComponentsRunning) {
        status = 'DEAD-RED';
      } else {
        status = 'DEAD-ORANGE';
      }
      if (status) {
        healthStatus = status;
      }
    }
    this.set('healthClass', 'health-status-' + healthStatus);
  },

  healthToolTip: function(){
    var hostComponents = this.get('hostComponents').filter(function(item){
      if(item.get('workStatus') !== App.HostComponentStatus.started){
        return true;
      }
    });
    var output = '';
    switch (this.get('healthClass')){
      case 'health-status-DEAD-RED':
        hostComponents = hostComponents.filterProperty('isMaster', true);
        output = Em.I18n.t('hosts.host.healthStatus.mastersDown');
        hostComponents.forEach(function(hc, index){
          output += (index == (hostComponents.length-1)) ? hc.get('displayName') : (hc.get('displayName')+", ");
        }, this);
        break;
      case 'health-status-DEAD-YELLOW':
        output = Em.I18n.t('hosts.host.healthStatus.heartBeatNotReceived');
        break;
      case 'health-status-DEAD-ORANGE':
        hostComponents = hostComponents.filterProperty('isSlave', true);
        output = Em.I18n.t('hosts.host.healthStatus.slavesDown');
        hostComponents.forEach(function(hc, index){
          output += (index == (hostComponents.length-1)) ? hc.get('displayName') : (hc.get('displayName')+", ");
        }, this);
        break;
      case 'health-status-LIVE':
        output = Em.I18n.t('hosts.host.healthStatus.allUp');
        break;
    }
    return output;
  }.property('hostComponents.@each.workStatus')
});

App.Host.FIXTURES = [];