Moved show season/episode cache to outside of the show class and turned it into a global to avoid circular ref that may memory leak.

sickbeard/db.py

@@ -208,9 +208,6 @@ class DBConnection(object):
     def __enter__(self):
         return self
 
-    def __del__(self):
-        self.close()
-
     def __exit__(self, exc_type, exc_val, exc_tb):
         self.close()
 

sickbeard/metadata/generic.py

@@ -32,6 +32,7 @@ from sickbeard import logger
 from sickbeard import encodingKludge as ek
 from sickbeard.exceptions import ex
 from sickbeard.show_name_helpers import allPossibleShowNames
+from sickbeard import tv
 
 from lib.tmdb_api.tmdb_api import TMDB
 
@@ -337,7 +338,7 @@ class GenericMetadata():
     def create_season_posters(self, show_obj):
         if self.season_posters and show_obj:
             result = []
-            for season, episodes in show_obj.episodes.iteritems():  # @UnusedVariable
+            for season, episodes in tv.episodeCache.iteritems():  # @UnusedVariable
                 if not self._has_season_poster(show_obj, season):
                     logger.log(u"Metadata provider " + self.name + " creating season posters for " + show_obj.name,
                                logger.DEBUG)
@@ -348,7 +349,7 @@ class GenericMetadata():
     def create_season_banners(self, show_obj):
         if self.season_banners and show_obj:
             result = []
-            for season, episodes in show_obj.episodes.iteritems():  # @UnusedVariable
+            for season, episodes in tv.episodeCache.iteritems():  # @UnusedVariable
                 if not self._has_season_banner(show_obj, season):
                     logger.log(u"Metadata provider " + self.name + " creating season banners for " + show_obj.name,
                                logger.DEBUG)

sickbeard/tv.py

@@ -24,6 +24,7 @@ import threading
 import re
 import glob
 import traceback
+import weakref
 
 import sickbeard
 
@@ -52,7 +53,7 @@ from common import DOWNLOADED, SNATCHED, SNATCHED_PROPER, SNATCHED_BEST, ARCHIVE
 from common import NAMING_DUPLICATE, NAMING_EXTEND, NAMING_LIMITED_EXTEND, NAMING_SEPARATED_REPEAT, \
     NAMING_LIMITED_EXTEND_E_PREFIXED
 
-
+episodeCache = {}
 class TVShow(object):
     def __init__(self, indexer, indexerid, lang=""):
 
@@ -89,7 +90,7 @@ class TVShow(object):
         self.lock = threading.Lock()
         self._isDirGood = False
 
-        self.episodes = {}
+        #self.episodes = {}
 
         otherShow = helpers.findCertainShow(sickbeard.showList, self.indexerid)
         if otherShow != None:
@@ -144,11 +145,12 @@ class TVShow(object):
 
     # delete references to anything that's not in the internal lists
     def flushEpisodes(self):
+        global episodeCache
 
-        for curSeason in self.episodes:
+        for curSeason in episodeCache:
-            for curEp in self.episodes[curSeason]:
+            for curEp in episodeCache[curSeason]:
-                myEp = self.episodes[curSeason][curEp]
+                myEp = episodeCache[curSeason][curEp]
-                self.episodes[curSeason][curEp] = None
+                episodeCache[curSeason][curEp] = None
                 del myEp
 
     def getAllEpisodes(self, season=None, has_location=False):
@@ -221,10 +223,10 @@ class TVShow(object):
                     logger.DEBUG)
                 return None
 
-        if not season in self.episodes:
+        if not season in episodeCache:
-            self.episodes[season] = {}
+            episodeCache[season] = {}
 
-        if not episode in self.episodes[season] or self.episodes[season][episode] is None:
+        if not episode in episodeCache[season] or episodeCache[season][episode] is None:
             if noCreate:
                 return None
 
@@ -247,9 +249,9 @@ class TVShow(object):
                                                                                               season, episode)
 
             if ep != None:
-                self.episodes[season][episode] = ep
+                episodeCache[season][episode] = ep
 
-        epObj = self.episodes[season][episode]
+        epObj = weakref.proxy(episodeCache[season][episode])
         return epObj
 
     def should_update(self, update_date=datetime.date.today()):
@@ -1816,6 +1818,7 @@ class TVEpisode(object):
         return result
 
     def deleteEpisode(self):
+        global episodeCache
 
         logger.log(u"Deleting " + self.show.name + " " + str(self.season) + "x" + str(self.episode) + " from the DB",
                    logger.DEBUG)
@@ -1823,7 +1826,7 @@ class TVEpisode(object):
         # remove myself from the show dictionary
         if self.show.getEpisode(self.season, self.episode, noCreate=True) == self:
             logger.log(u"Removing myself from my show's list", logger.DEBUG)
-            del self.show.episodes[self.season][self.episode]
+            del episodeCache[self.season][self.episode]
 
         # delete myself from the DB
         logger.log(u"Deleting myself from the database", logger.DEBUG)

sickbeard/webserve.py

@@ -86,7 +86,6 @@ def _handle_reverse_proxy():
 
 cherrypy.tools.handle_reverse_proxy = cherrypy.Tool('before_handler', _handle_reverse_proxy)
 
-
 class PageTemplate(Template):
     def __init__(self, *args, **KWs):
         KWs['file'] = os.path.join(sickbeard.PROG_DIR, "gui/" + sickbeard.GUI_NAME + "/interfaces/default/",