data/UpdateStore.js

   1 /* Extends the Ext.data.Store type
   2  * with  startUpdate() and stopUpdate() methods
   3  * to refresh the store data in the background
   4  * Components using this store directly will flicker
   5  * due to the redisplay of the element ater 'config.interval' ms
   6  *
   7  * Note that you have to call yourself startUpdate() for the background load
   8  * to begin
   9  */
  10 Ext.define('Proxmox.data.UpdateStore', {
  11     extend: 'Ext.data.Store',
  12     alias: 'store.update',
  13
  14     isStopped: true,
  15
  16     autoStart: false,
  17
  18     destroy: function() {
  19         var me = this;
  20         me.load_task.cancel();
  21         Proxmox.data.UpdateQueue.unqueue(me);
  22         me.callParent();
  23     },
  24
  25     constructor: function(config) {
  26         var me = this;
  27
  28         config = config || {};
  29
  30         if (!config.interval) {
  31             config.interval = 3000;
  32         }
  33
  34         if (!config.storeid) {
  35             throw "no storeid specified";
  36         }
  37
  38         var load_task = new Ext.util.DelayedTask();
  39
  40         var run_load_task = function() {
  41             if (me.isStopped) {
  42                 return;
  43             }
  44
  45             if (Proxmox.Utils.authOK()) {
  46                 Proxmox.data.UpdateQueue.queue(me, function(runtime, success) {
  47                     var interval = config.interval + runtime*2;
  48                     load_task.delay(interval, run_load_task);
  49                 });
  50             } else {
  51                 load_task.delay(200, run_load_task);
  52             }
  53         };
  54
  55         Ext.apply(config, {
  56             startUpdate: function() {
  57                 me.isStopped = false;
  58                 run_load_task();
  59             },
  60             stopUpdate: function() {
  61                 me.isStopped = true;
  62                 load_task.cancel();
  63                 Proxmox.data.UpdateQueue.unqueue(me);
  64             }
  65         });
  66
  67         me.callParent([config]);
  68
  69         me.load_task = load_task;
  70
  71         if (me.autoStart) {
  72             me.startUpdate();
  73         }
  74     }
  75 });