From b76b19b62c572f02adbfbc462defe875ae4a04c5 Mon Sep 17 00:00:00 2001
From: Tomasz Mieszkowski <tomasz.mieszkowski@ext.allegro.pl>
Date: Fri, 5 Sep 2014 11:32:54 +0200
Subject: Fix for tiles' keys cache.

---
 tipboard/app.py | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/tipboard/app.py b/tipboard/app.py
index 59f93b4..a31ff1b 100644
--- a/tipboard/app.py
+++ b/tipboard/app.py
@@ -118,21 +118,26 @@ class DashboardSocketHandler(tornado.websocket.WebSocketHandler, RedisMixin,
             self.pubsub.disconnect()
         self.getter.disconnect()
 
+
     @tornado.gen.engine
     def on_message(self, message):
         log.info('Message received: %s.', message)
         if message != 'update':
             return
+        stale_keys = set()
         for tile_id in self.cache:
             log.debug('Putting data for tile: {}'.format(tile_id))
             raw = yield tornado.gen.Task(self.getter.get, tile_id)
             if not raw:
                 log.warn('No data in key %s on Redis.', tile_id)
-                del self.cache[tile_id]
+                stale_keys.add(tile_id)
                 continue
             data = json.loads(raw)
             data['tipboard'] = self.tipboard_helpers
             self.write_message(data)
+        if stale_keys:
+            self.cache.difference_update(stale_keys)
+
 
     @tornado.gen.engine
     def on_publish(self, msg):
-- 
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