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Adding random delay to realtime feed unread counts to prevent thundering herd.

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Samuel Clay 2013-04-22 16:20:14 -07:00
parent d209b2e905
commit 8f0af59604
1 changed files with 10 additions and 3 deletions
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13
media/js/newsblur/reader/reader.js
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@ -3894,7 +3894,7 @@
this.socket.removeAllListeners('feed:update'); this.socket.removeAllListeners('feed:update');
this.socket.on('feed:update', _.bind(function(feed_id, message) { this.socket.on('feed:update', _.bind(function(feed_id, message) {
NEWSBLUR.log(['Real-time feed update', feed_id, message]); NEWSBLUR.log(['Real-time feed update', feed_id, message]);
this.feed_unread_count(feed_id); this.feed_unread_count(feed_id, {realtime: true});
}, this)); }, this));
this.socket.removeAllListeners(NEWSBLUR.Globals.username); this.socket.removeAllListeners(NEWSBLUR.Globals.username);
@ -4039,11 +4039,18 @@
this.toggle_focus_in_slider(); this.toggle_focus_in_slider();
}, },
feed_unread_count: function(feed_id, callback) { feed_unread_count: function(feed_id, options) {
options = options || {};
feed_id = feed_id || this.active_feed; feed_id = feed_id || this.active_feed;
if (!feed_id) return; if (!feed_id) return;
this.model.feed_unread_count(feed_id, callback); var feed = this.model.get_feed(feed_id);
var subs = feed.get('num_subscribers');
var delay = options.realtime ? subs * 2 : 0; // 1,000 subs = 2 seconds
_.delay(_.bind(function() {
this.model.feed_unread_count(feed_id, options.callback);
}, this), Math.random() * delay);
}, },
// =================== // ===================