ambari/ambari-web/app/models/service.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');
require('utils/config');

App.Service = DS.Model.extend({

  serviceName: DS.attr('string'),

  workStatus: DS.attr('string'),
  rand: DS.attr('string'),
  alerts: DS.hasMany('App.Alert'),
  quickLinks: DS.hasMany('App.QuickLinks'),
  hostComponents: DS.hasMany('App.HostComponent'),
  serviceConfigsTemplate: App.config.get('preDefinedServiceConfigs'),
  runningHostComponents: null,

  // 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
  healthStatus: '',
  isStopped: false,
  isStarted: false,

  isConfigurable: function () {
    var configurableServices = [
      "HDFS",
      "YARN",
      "MAPREDUCE",
      "MAPREDUCE2",
      "HBASE",
      "OOZIE",
      "HIVE",
      "WEBHCAT",
      "ZOOKEEPER",
      "PIG",
      "SQOOP",
      "NAGIOS",
      "HUE"
    ];
    return configurableServices.contains(this.get('serviceName'));
  }.property('serviceName'),

  displayName: function () {
    switch (this.get('serviceName').toLowerCase()) {
      case 'hdfs':
        return 'HDFS';
      case 'yarn':
        return 'YARN';
      case 'mapreduce':
        return 'MapReduce';
      case 'mapreduce2':
        return 'MapReduce2';
      case 'tez':
        return 'Tez';
      case 'hbase':
        return 'HBase';
      case 'oozie':
        return 'Oozie';
      case 'hive':
        return 'Hive';
      case 'hcatalog':
        return 'HCat';
      case 'zookeeper':
        return 'ZooKeeper';
      case 'pig':
        return 'Pig';
      case 'sqoop':
        return 'Sqoop';
      case 'webhcat':
        return 'WebHCat';
      case 'ganglia':
        return 'Ganglia';
      case 'nagios':
        return 'Nagios';
      case 'hue':
        return 'Hue';
      case 'flume':
        return 'Flume';
    }
    return this.get('serviceName');
  }.property('serviceName'),
  
  /**
   * For each host-component, if the desired_configs dont match the
   * actual_configs, then a restart is required. Except for Global site
   * properties, which need to be checked with map.
   */
  isRestartRequired: function () {
    var rhc = this.get('hostComponents').filterProperty('staleConfigs', true);
    var hc = {};
    rhc.forEach(function(_rhc) {
      var hostName = _rhc.get('host.publicHostName');
      if (!hc[hostName]) {
        hc[hostName] = [];
      }
      hc[hostName].push(_rhc.get('displayName'));
    });
    this.set('restartRequiredHostsAndComponents', hc);
    return (rhc.length>0);

  }.property('serviceName', 'hostComponents'),
  
  /**
   * Contains a map of which hosts and host_components
   * need a restart. This is populated when calculating
   * #isRestartRequired()
   * Example:
   * {
   *  'publicHostName1': ['TaskTracker'],
   *  'publicHostName2': ['JobTracker', 'TaskTracker']
   * }
   */
  restartRequiredHostsAndComponents: {},
  
  /**
   * Based on the information in #restartRequiredHostsAndComponents
   */
  restartRequiredMessage: function () {
    var restartHC = this.get('restartRequiredHostsAndComponents');
    var hostCount = 0;
    var hcCount = 0;
    var hostsMsg = "<ul>";
    for(var host in restartHC){
      hostCount++;
      hostsMsg += "<li>"+host+"</li><ul>";
      restartHC[host].forEach(function(c){
        hcCount++;
        hostsMsg += "<li>"+c+"</li>";       
      })
      hostsMsg += "</ul>";
    }
    hostsMsg += "</ul>"
    return this.t('services.service.config.restartService.TooltipMessage').format(hcCount, hostCount, hostsMsg);
  }.property('restartRequiredHostsAndComponents')
});

App.Service.Health = {
  live: "LIVE",
  dead: "DEAD-RED",
  starting: "STARTING",
  stopping: "STOPPING",
  unknown: "DEAD-YELLOW",

  getKeyName: function (value) {
    switch (value) {
      case this.live:
        return 'live';
      case this.dead:
        return 'dead';
      case this.starting:
        return 'starting';
      case this.stopping:
        return 'stopping';
      case this.unknown:
        return 'unknown';
    }
    return 'none';
  }
};

App.Service.FIXTURES = [];