def get_summary(self, url):
key = self.create_summary_key(url)
value = memcache.get(key)
if value is None:
# MEMO: 1度だけ再試行する
try:
value = HatenaBookmark.get_summary(url)
except urlfetch.DownloadError:
logging.info("retry download")
value = HatenaBookmark.get_summary(url)
if value == (None, None):
ttl = self.ttl_negative
else:
ttl = self.ttl
memcache.add(key, value, ttl)
return value
