def testGetStats(self):
"""Tests get_stats."""
self.assertTrue(memcache.set(self.key1, self.value1))
self.assertTrue(memcache.set(self.key2, self.value2))
self.assertEqual(self.value1, memcache.get(self.key1))
self.assertEqual(self.value2, memcache.get(self.key2))
self.assertLen(memcache.get_multi([self.key1, self.key2]), 2)
self.assertEqual(None, memcache.get(self.key3))
self.assertEqual(None, memcache.get('unknown'))
self.assertEqual(None, memcache.get('another not known'))
self.assertEmpty(memcache.get_multi(['what', 'who']))
self._StepClock(7)
result = memcache.get_stats()
expected = {
memcache.STAT_HITS:
4,
memcache.STAT_MISSES:
5,
memcache.STAT_BYTE_HITS:
(2 * (len(self.key1) + len(self.value1) + len(self.key2_hash) +
len(self.value2))),
memcache.STAT_ITEMS:
2,
memcache.STAT_BYTES: (len(self.key1) + len(self.value1) +
len(self.key2_hash) + len(self.value2)),
memcache.STAT_OLDEST_ITEM_AGES:
7,
}
self.assertEqual(expected, result)
def get_multi_test():
memcache.set_multi(DATA, 30, key_prefix='memcache_get_multi_test')
now = time()
memcache.get_multi(MULTI_KEYS, key_prefix='memcache_get_multi_test')
result = time() - now
memcache.delete_multi(MULTI_KEYS, key_prefix='memcache_get_multi_test')
return result
def get(self):
self.test_memcache()
self.test_memcache()
memcache.set_multi({'key': 'value', 'other': 'value'})
memcache.get_multi(['key', 'other', 'thing'])
self.response.out.write('Hello world')
def prefetch_posts_list(posts):
prefetch_refprops(posts, Post.user)
posts_keys = [str(post.key()) for post in posts]
# get user, if no user, all already_voted = no
session = get_current_session()
if session.has_key('user'):
user = session['user']
memcache_voted_keys = [
"vp_" + post_key + "_" + str(user.key()) for post_key in posts_keys
]
memcache_voted = memcache.get_multi(memcache_voted_keys)
memcache_to_add = {}
for post in posts:
vote_value = memcache_voted.get("vp_" + str(post.key()) + "_" +
str(user.key()))
if vote_value is not None:
post.prefetched_already_voted = vote_value == 1
else:
vote = Vote.all().filter("user ="******"post =", post).fetch(1)
memcache_to_add["vp_" + str(post.key()) + "_" +
str(user.key())] = len(vote)
post.prefetched_already_voted = len(vote) == 1
if memcache_to_add.keys():
memcache.add_multi(memcache_to_add, 3600)
else:
for post in posts:
post.prefetched_already_voted = False
# now the sum_votes
memcache_sum_votes_keys = ["p_" + post_key for post_key in posts_keys]
memcache_sum_votes = memcache.get_multi(memcache_sum_votes_keys)
memcache_to_add = {}
for post in posts:
sum_votes_value = memcache_sum_votes.get("p_" + str(post.key()))
if sum_votes_value is not None:
post.prefetched_sum_votes = sum_votes_value
else:
sum_votes = Vote.all().filter("post =", post).count()
memcache_to_add["p_" + str(post.key())] = sum_votes
post.prefetched_sum_votes = sum_votes
if memcache_to_add.keys():
memcache.add_multi(memcache_to_add, 3600)
# finally we get all the comment count from memcache
memcache_comment_count_keys = ["pc_" + post_key for post_key in posts_keys]
memcache_comment_count = memcache.get_multi(memcache_comment_count_keys)
memcache_to_add = {}
for post in posts:
comment_count = memcache_comment_count.get("pc_" + str(post.key()))
if comment_count is not None:
post.cached_comment_count = comment_count
else:
comment_count = post.comments.count()
memcache_to_add["pc_" + str(post.key())] = comment_count
post.cached_comment_count = comment_count
if memcache_to_add.keys():
memcache.add_multi(memcache_to_add, 3600)
def testCacheGetOneItemInMemcache(self):
ranker_class = self.mox.CreateMock(result_ranker.CountRanker)
self.mox.StubOutWithMock(memcache, 'get_multi')
memcache.get_multi(['k1'], **self.memcache_params).AndReturn({'k1': 's1'})
ranker_class.FromString('k1', 's1').AndReturn('r1')
self.mox.ReplayAll()
rankers = self.cls.CacheGet(['k1'], {'k1': ranker_class})
self.mox.VerifyAll()
self.assertEqual({'k1': 'r1'}, rankers)
def testCacheGetOneItemNotFound(self):
ranker_class = self.mox.CreateMock(result_ranker.CountRanker)
self.mox.StubOutWithMock(memcache, 'get_multi')
memcache.get_multi(['k1'], **self.memcache_params).AndReturn({})
ranker_class.get_by_key_name(['k1']).AndReturn([None])
self.mox.ReplayAll()
rankers = self.cls.CacheGet(['k1'], {'k1': ranker_class})
self.mox.VerifyAll()
self.assertEqual({}, rankers)
def testCacheGetOneItemNotFound(self):
ranker_class = self.mox.CreateMock(result_ranker.CountRanker)
self.mox.StubOutWithMock(memcache, 'get_multi')
memcache.get_multi(['k1'], **self.memcache_params).AndReturn({})
ranker_class.get_by_key_name(['k1']).AndReturn([None])
self.mox.ReplayAll()
rankers = self.cls.CacheGet(['k1'], {'k1': ranker_class})
self.mox.VerifyAll()
self.assertEqual({}, rankers)
def testCacheGetOneItemInMemcache(self):
ranker_class = self.mox.CreateMock(result_ranker.CountRanker)
self.mox.StubOutWithMock(memcache, 'get_multi')
memcache.get_multi(['k1'],
**self.memcache_params).AndReturn({'k1': 's1'})
ranker_class.FromString('k1', 's1').AndReturn('r1')
self.mox.ReplayAll()
rankers = self.cls.CacheGet(['k1'], {'k1': ranker_class})
self.mox.VerifyAll()
self.assertEqual({'k1': 'r1'}, rankers)
def testMulti(self):
"""Stores multiple keys' values at once."""
memcache.set_multi({'map_key_one': 1, 'map_key_two': u'some value'})
values = memcache.get_multi(['map_key_one', 'map_key_two'])
assert {'map_key_one': 1, 'map_key_two': u'some value'} == values
memcache.add_multi(
{'map_key_one': 'one', 'map_key_two': 2, 'three': u'trois'})
values = memcache.get_multi(['map_key_two', 'three'])
assert {'map_key_two': u'some value', 'three': u'trois'} == values
def prefetch_posts_list(posts):
prefetch_refprops(posts, Post.user)
posts_keys = [str(post.key()) for post in posts]
# get user, if no user, all already_voted = no
session = get_current_session()
if session.has_key('user'):
user = session['user']
memcache_voted_keys = ["vp_" + post_key + "_" + str(user.key()) for post_key in posts_keys]
memcache_voted = memcache.get_multi(memcache_voted_keys)
memcache_to_add = {}
for post in posts:
vote_value = memcache_voted.get("vp_" + str(post.key()) + "_" +str(user.key()))
if vote_value is not None:
post.prefetched_already_voted = vote_value == 1
else:
vote = Vote.all().filter("user ="******"post =", post).fetch(1)
memcache_to_add["vp_" + str(post.key()) + "_" + str(user.key())] = len(vote)
post.prefetched_already_voted = len(vote) == 1
if memcache_to_add.keys():
memcache.add_multi(memcache_to_add, 3600)
else:
for post in posts:
post.prefetched_already_voted = False
# now the sum_votes
memcache_sum_votes_keys = ["p_" + post_key for post_key in posts_keys]
memcache_sum_votes = memcache.get_multi(memcache_sum_votes_keys)
memcache_to_add = {}
for post in posts:
sum_votes_value = memcache_sum_votes.get("p_" + str(post.key()))
if sum_votes_value is not None:
post.prefetched_sum_votes = sum_votes_value
else:
sum_votes = Vote.all().filter("post =", post).count()
memcache_to_add["p_" + str(post.key())] = sum_votes
post.prefetched_sum_votes = sum_votes
if memcache_to_add.keys():
memcache.add_multi(memcache_to_add, 3600)
# finally we get all the comment count from memcache
memcache_comment_count_keys = ["pc_" + post_key for post_key in posts_keys]
memcache_comment_count = memcache.get_multi(memcache_comment_count_keys)
memcache_to_add = {}
for post in posts:
comment_count = memcache_comment_count.get("pc_" + str(post.key()))
if comment_count is not None:
post.cached_comment_count = comment_count
else:
comment_count = post.comments.count()
memcache_to_add["pc_" + str(post.key())] = comment_count
post.cached_comment_count = comment_count
if memcache_to_add.keys():
memcache.add_multi(memcache_to_add, 3600)
def testMulti(self):
"""Stores multiple keys' values at once."""
memcache.set_multi({'map_key_one': 1, 'map_key_two': u'some value'})
values = memcache.get_multi(['map_key_one', 'map_key_two'])
assert {'map_key_one': 1, 'map_key_two': u'some value'} == values
memcache.add_multi({
'map_key_one': 'one',
'map_key_two': 2,
'three': u'trois'
})
values = memcache.get_multi(['map_key_two', 'three'])
assert {'map_key_two': u'some value', 'three': u'trois'} == values
def prefetch_comment_list(comments):
prefetch_refprops(comments, Comment.user, Comment.post)
# call all the memcache information
# starting by the already_voted area
comment_keys = [str(comment.key()) for comment in comments]
session = get_current_session()
if session.has_key('user'):
user = session['user']
memcache_voted_keys = [
"cp_" + comment_key + "_" + str(user.key())
for comment_key in comment_keys
]
memcache_voted = memcache.get_multi(memcache_voted_keys)
memcache_to_add = {}
for comment in comments:
vote_value = memcache_voted.get("cp_" + str(comment.key()) + "_" +
str(user.key()))
if vote_value is not None:
comment.prefetched_already_voted = vote_value == 1
else:
vote = Vote.all().filter("user ="******"comment =",
comment).fetch(1)
memcache_to_add["cp_" + str(comment.key()) + "_" +
str(user.key())] = len(vote)
comment.prefetched_already_voted = len(vote) == 1
if memcache_to_add.keys():
memcache.add_multi(memcache_to_add, 3600)
else:
for comment in comments:
comment.prefetched_already_voted = False
# now the sum_votes
memcache_sum_votes_keys = [
"c_" + comment_key for comment_key in comment_keys
]
memcache_sum_votes = memcache.get_multi(memcache_sum_votes_keys)
memcache_to_add = {}
for comment in comments:
sum_votes_value = memcache_sum_votes.get("c_" + str(comment.key()))
if sum_votes_value is not None:
comment.prefetched_sum_votes = sum_votes_value
else:
sum_votes = Vote.all().filter("comment =", comment).count()
memcache_to_add["c_" + str(comment.key())] = sum_votes
comment.prefetched_sum_votes = sum_votes
if memcache_to_add.keys():
memcache.add_multi(memcache_to_add, 3600)
def get_status_dict(self):
# It will returns a serialized status in mem_cache
serialized_status = memcache.get_multi(self.status_ids,
key_prefix='status')
# Just copying my status_ids list to make some changes localy
missing_status_ids = list(self.status_ids)
game_status = {}
for status_id, status in serialized_status.iteritems():
game_status[status_id] = deserialize(status)
missing_status_ids.remove(status_id)
# Taking the missing status in database and add them in memcache
if missing_status_ids:
missing_status = Status.get(missing_status_ids)
serialized_status = {}
for status in missing_status:
game_status[status_id] = deserialize(status)
serialized_status[status.id] = serialize(status)
memcache.set_multi(serialized_status, key_prefix='status')
# I really dunno why, but the game_status list in this function
# works like a list of string, and when this function pass to some
# function or when it returns, game_status assume its really identity
# that is a list of status, not a list of strings... (crazy, I know)
self.actualise_status(game_status)
return game_status # Returns a random list of Status playing this game
def batch_put(mbc_name, bucket_key, list_keys, decrementing=False):
from apps.user.models import *
logging.info("Batch putting %s to memcache: %s" % (mbc_name, list_keys))
mbc = MemcacheBucketConfig.get_or_create(mbc_name)
entities_to_put = []
had_error = False
object_dict = memcache.get_multi(list_keys)
for key in list_keys:
data = object_dict.get(key)
try:
entity = db.model_from_protobuf(entity_pb.EntityProto(data))
if entity:
entities_to_put.append(entity)
except AssertionError, e:
old_key = mbc.get_bucket(mbc.count)
if bucket_key != old_key and not decrementing and not had_error:
old_count = mbc.count
mbc.decrement_count()
logging.warn(
'encounted error, going to decrement buckets from %s to %s'
% (old_count, mbc.count), exc_info=True)
last_keys = memcache.get(old_key) or []
memcache.set(old_key, [], time=MEMCACHE_TIMEOUT)
deferred.defer(batch_put, mbc_name, old_key, last_keys,
decrementing=True, _queue='slow-deferred')
had_error = True
except Exception, e:
logging.error('error getting object: %s' % e, exc_info=True)
def Get(key):
"""Get a memcache entry, or None."""
key = MEMCACHE_PREFIX + key
shard_map = memcache.get(key)
if not shard_map:
# The shard_map was evicted or never set.
return
# If zero shards, the content was small enough and stored in the shard_map.
num_shards = shard_map['num_shards']
if num_shards == 0:
return pickle.loads(shard_map['content'])
keys = ['%s%d' % (key, i) for i in range(num_shards)]
shards = memcache.get_multi(keys)
if len(shards) != num_shards:
# One or more content shards were evicted, delete map and content shards.
memcache.delete_multi([key] + keys)
return
# All shards present, stitch contents back together and unpickle.
shards = tuple([shards[key] for key in keys])
value = '%s' * shard_map['num_shards']
value = pickle.loads(value % shards)
return value
def testUpdateStatsBasic(self):
category = 'Aardvark'
updated_summary_stats = self.cls.UpdateStats(category, TEST_STATS[category])
memcache_summary_stats = memcache.get_multi(
['Firefox 3', 'Firefox 3.5'], namespace=self.cls.MEMCACHE_NAMESPACE)
expected_summary_stats = {
'Firefox 3': {
'results': {
'Aardvark': {
'score': 2,
'display': '93/100',
'total_runs': 8,
},
},
},
'Firefox 3.5': {
'results': {
'Aardvark': {
'score': 5,
'display': '83/100',
'total_runs': 5,
},
},
},
}
self.assertEqual(expected_summary_stats, updated_summary_stats)
self.assertEqual(expected_summary_stats, memcache_summary_stats)
def filter(self, urls):
"""Checks if each URL can proceed based on a successful score.
Args:
urls: Iterable of URLs to check. Each input URL will have a corresponding
result returned in the same order they were passed in.
Returns:
List of tuple (allowed, failure_percentage) where:
allowed: True if the URL passed the filter, False otherwise.
failure_percentage: Percent of failures seen during the current
scoring period. Number between 0 and 1.
"""
domain_list = [get_url_domain(u) for u in urls]
keys = ['success:' + d for d in domain_list]
keys.extend('failure:' + d for d in domain_list)
values = memcache.get_multi(keys, key_prefix=self.prefix)
result = []
for domain in domain_list:
success = values.get('success:' + domain, 0)
failure = values.get('failure:' + domain, 0)
requests = success + failure
if requests > 0:
failure_percentage = (1.0 * failure) / requests
else:
failure_percentage = 0
allow = bool(DISABLE_FOR_TESTING or requests < self.min_requests
or failure_percentage < self.max_failure_percentage)
result.append((allow, failure_percentage))
return result
def retrieve(key):
result = memcache.get_multi(['%s.%s' % (key, i) for i in xrange(32)])
if result:
serialized_data = ''.join([i for key, i in sorted(result.items()) if key in result and i is not None])
return pickle.loads(serialized_data)
else:
return None
def _render(self, *args, **kw):
avatars = []
shards = memcache.get_multi(
['2018avatars_{}'.format(i) for i in xrange(10)])
if len(shards) == 10: # If missing a shard, must refetch all
for _, shard in sorted(shards.items(), key=lambda kv: kv[0]):
avatars += shard
if not avatars:
avatars_future = Media.query(
Media.media_type_enum == MediaType.AVATAR).fetch_async()
avatars = sorted(avatars_future.get_result(),
key=lambda a: int(a.references[0].id()[3:]))
shards = {}
size = len(avatars) / 10 + 1
for i in xrange(10):
start = i * size
end = start + size
shards['2018avatars_{}'.format(i)] = avatars[start:end]
memcache.set_multi(shards, 60 * 60 * 24)
self.template_values.update({
'avatars': avatars,
})
return jinja2_engine.render('avatars2018.html', self.template_values)
def get(self):
# Memcache doesn't support saving values > 1MB. Break up features into chunks
# and save those to memcache.
if self.MODEL_CLASS == models.FeatureObserver:
keys = self.PROPERTY_CLASS.get_property_chunk_memcache_keys(
self.PROPERTY_CLASS, self.MEMCACHE_KEY)
properties = memcache.get_multi(keys)
if len(properties.keys()) != len(properties) or not properties:
properties = self.__query_metrics_for_properties()
# Memcache doesn't support saving values > 1MB. Break up list into chunks.
chunk_keys = self.PROPERTY_CLASS.set_property_chunk_memcache_keys(
self.MEMCACHE_KEY, properties)
memcache.set_multi(chunk_keys, time=CACHE_AGE)
else:
temp_list = []
for key in sorted(properties.keys()):
temp_list.extend(properties[key])
properties = temp_list
else:
properties = memcache.get(self.MEMCACHE_KEY)
if properties is None:
properties = self.__query_metrics_for_properties()
memcache.set(self.MEMCACHE_KEY, properties, time=CACHE_AGE)
properties = self._clean_data(properties)
# Metrics json shouldn't be cached by intermediary caches because users
# see different data when logged in. Set Cache-Control: private.
super(FeatureHandler, self).get(properties, public=False)
def new_getTopNews(page=1,category=None,cacheread=True,cachewrite=True):
articles=None
key='topnews_'+str(page)+"_"+str(category)
if cacheread:
articles=memcache.get(key)
updatecache=False
if not articles:
articles=ArticleLib.getTopNews(page, category)
updatecache=True
if articles:
keys=[]
#TODO: get the correct article.numapprovals and article.numcomments
for article in articles:
keys.append("n_approvals_"+str(article.key()))
keys.append("ncomments_"+str(article.key()))
records=memcache.get_multi(keys)
# for key,value in records.items():
# logging.info(key+"="+str(value))
for article in articles:
if records.has_key("n_approvals_"+str(article.key())) and records["n_approvals_"+str(article.key())]:
if records["n_approvals_"+str(article.key())] > article.numapprovals:
#logging.info("overriding numapprovals to "+str(records["n_approvals_"+str(article.key())]))
article.numapprovals=records["n_approvals_"+str(article.key())]
if records.has_key("ncomments_"+str(article.key())) and records["ncomments_"+str(article.key())]:
if records["ncomments_"+str(article.key())] > article.numcomments:
article.numcomments=records["ncomments_"+str(article.key())]
if updatecache:
#logging.info("memcache set articles")
memcache.set(key,articles,86400)
return articles
def get_counts_from_memcache(self):
max_time = min(self.poll.duration,self.calc_offset())
caches = []
for offset in range(max_time+1):
caches.append("counts,%s,%d" % (self.name, offset))
return memcache.get_multi(caches)
def get(self, cluster_id=None):
cluster_attrs = fetch_config[cluster_id]
result = urlfetch.fetch(cluster_attrs['url'])
# appids = result.content.split('|')
appids = lib.getAppidFromINI(result.content)
appid_dict = memcache.get_multi(appids)
response_dict = {
"available": [],
"over_quota": [],
}
for appid, val in appid_dict.iteritems():
if val is True:
response_dict['available'].append(appid)
elif val is False:
response_dict['over_quota'].append(appid)
response_dict['status_msg'] = "今日还剩 %dGB/%dGB 流量" % (len(response_dict['available']), len(appids))
response_json = json.dumps(response_dict, ensure_ascii=False)
self.response.write(response_json)
def prefetch_posts_list(posts):
prefetch_refprops(posts, Post.user)
posts_keys = [str(post.key()) for post in posts]
# get user, if no user, all already_voted = no
session = get_current_session()
if session.has_key('user'):
user = session['user']
memcache_voted_keys = ["vp_" + post_key + "_" + str(user.key()) for post_key in posts_keys]
memcache_voted = memcache.get_multi(memcache_voted_keys)
memcache_to_add = {}
for post in posts:
logging.info("Got a post")
vote_value = memcache_voted.get("vp_" + str(post.key()) + "_" +str(user.key()))
if vote_value is not None:
post.prefetched_already_voted = vote_value == 1
else:
vote = Vote.all().filter("user ="******"post =", post).fetch(1)
memcache_to_add["vp_" + str(post.key()) + "_" + str(user.key())] = len(vote)
post.prefetched_already_voted = len(vote) == 1
if memcache_to_add.keys():
memcache.add_multi(memcache_to_add, 3600)
else:
for post in posts:
post.prefetched_already_voted = False
def task(stories):
def check_story(rpc):
try:
result = rpc.get_result()
story = json.loads(result.content)
if story and story.get('score') >= 100:
StoryPost.add(story)
elif story:
logging.info('STOP: {id} has low score ({score})'.format(**story))
else:
logging.info('STOP: story was probably deleted/flagged')
except urlfetch.DownloadError as ex:
logging.exception(ex)
except ValueError as ex:
logging.info(result.content)
logging.exception(ex)
# stringify ids for use in memcache and convert to set for later
ids = set(str(story_id) for story_id in stories)
logging.info('checking stories: {}'.format(ids))
# get stories that we already posted to reduce the number of requests
cached_stories = set(memcache.get_multi(ids).keys())
logging.info('cached stories: {}'.format(cached_stories))
# remove stories we know about from stories that we need to check
stories_to_check = ids.difference(cached_stories)
rpcs = map(lambda id: item_async(id, check_story), stories_to_check)
for rpc in rpcs:
rpc.wait()
def load_summary_protos(java_application=False):
"""Load all valid summary records from memcache.
Args:
java_application: Boolean. If true, this function is being invoked
by the download_appstats tool on a java application.
Returns:
A list of StatsProto instances, in reverse chronological order
(i.e. most recent first).
NOTE: This is limited to returning at most config.KEY_MODULUS records,
since there are only that many distinct keys. See also make_key().
"""
tmpl = config.KEY_PREFIX + config.KEY_TEMPLATE + config.PART_SUFFIX
if java_application:
tmpl = '"' + tmpl + '"'
keys = [tmpl % i
for i in
range(0, config.KEY_DISTANCE * config.KEY_MODULUS,
config.KEY_DISTANCE)]
results = memcache.get_multi(keys, namespace=config.KEY_NAMESPACE)
records = []
for rec in results.itervalues():
try:
pb = StatsProto(rec)
except Exception, err:
logging.warn('Bad record: %s', err)
else:
records.append(pb)
def stop(self):
self.active = False
game_slugs = get_game_slugs()
if self.slug in game_slugs:
game_slugs.remove(self.slug)
memcache.set('game_slugs', game_slugs)
serialized_status = memcache.get_multi(self.status_ids,
key_prefix='status')
# Just copying my status_ids list to make some changes localy
missing_status_ids = list(self.status_ids)
for status_id, status in serialized_status.iteritems():
deserialized_status = deserialize(status)
deserialized_status.player.leave_game(self)
missing_status_ids.remove(status_id)
# Taking the missing status in database
if missing_status_ids:
missing_status = Status.get(missing_status_ids)
for status in missing_status:
status.player.leave_game(self)
memcache.delete('game'+self.slug)
self.status_ids = []
self.put()
def Get(key):
"""Get a memcache entry, or None."""
key = MEMCACHE_PREFIX + key
shard_map = memcache.get(key)
if not shard_map:
# The shard_map was evicted or never set.
return
# If zero shards, the content was small enough and stored in the shard_map.
num_shards = shard_map['num_shards']
if num_shards == 0:
return pickle.loads(shard_map['content'])
keys = ['%s%d' % (key, i) for i in range(num_shards)]
shards = memcache.get_multi(keys)
if len(shards) != num_shards:
# One or more content shards were evicted, delete map and content shards.
memcache.delete_multi([key] + keys)
return
# All shards present, stitch contents back together and unpickle.
shards = tuple([shards[key] for key in keys])
value = '%s' * shard_map['num_shards']
value = pickle.loads(value % shards)
return value
def get(key):
result = memcache.get_multi(['%s.%s' % (key, i) for i in xrange(32)])
serialized = ''.join([v for v in result.values() if v is not None])
try:
return pickle.loads(serialized)
except: # TODO: Use a more specific exception type.
return None
def UpdateStats(cls, category, stats):
"""Update the summary stats in memory and the datastore.
This will only update part of a summary score row.
Args:
category: a category string like 'network'
stats: a dict of browser stats (see CategoryStatsManager.GetStats)
Returns:
The summary stats that have been updated by the given stats.
(Used by GetStats.)
"""
browsers = [b for b in stats.keys() if b != 'total_runs']
update_summary_stats = memcache.get_multi(
browsers, namespace=cls.MEMCACHE_NAMESPACE)
for browser in browsers:
ua_summary_stats = update_summary_stats.setdefault(browser, {
'results': {}})
ua_summary_stats['results'][category] = {
'score': stats[browser]['summary_score'],
'display': stats[browser]['summary_display'],
'total_runs': stats[browser]['total_runs'],
}
if category == 'acid3':
ua_summary_stats['results']['acid3']['display'] = (
stats[browser]['results']['score']['display'])
memcache.set_multi(update_summary_stats, namespace=cls.MEMCACHE_NAMESPACE)
return update_summary_stats
def _Dynamic_Get(self, request, response):
"""Intercepts get requests and returns them from cache if available."""
if request.has_transaction():
self.CallWrappedStub('Get', request, response)
return
new_request = datastore_pb.GetRequest()
new_response = datastore_pb.GetResponse()
encoded_keys = [k.Encode() for k in request.key_list()]
cached = memcache.get_multi(encoded_keys)
for key, encoded_key in itertools.izip(request.key_list(), encoded_keys):
if encoded_key not in cached:
new_request.add_key().CopyFrom(key)
if new_request.key_size() > 0:
logging.info("SHIM: keys are not in memcache: %s" % request.key_list())
self.CallWrappedStub('Get', new_request, new_response)
entity_iter = iter(new_response.entity_list())
to_put = dict()
for encoded_key in encoded_keys:
entity = cached.get(encoded_key, None)
if entity:
response.add_entity().mutable_entity().CopyFrom(entity)
else:
entity = entity_iter.next()
if entity.entity().IsInitialized():
# self.entity_cache[encoded_key] = entity.entity()
to_put[encoded_key] = entity.entity()
response.add_entity().CopyFrom(entity)
if to_put:
memcache.set_multi(to_put)
def get(self):
# [START batch]
values = {'comment': 'I did not ... ', 'comment_by': 'Bill Holiday'}
if not memcache.set_multi(values):
logging.error('Unable to set Memcache values')
tvalues = memcache.get_multi(('comment', 'comment_by'))
self.response.write(tvalues)
def cache_retrieve(key):
result = memcache.get_multi(['%s.%s' % (key, i) for i in xrange(32)])
serialized = ''.join(
[v for k, v in sorted(result.items()) if v is not None])
if serialized == '':
return None
return pickle.loads(serialized)
def get(setting):
# 1. Try request-local cache
request = webapp2.get_request()
if request:
if 'thonkify_setting_cache' not in request.registry:
request.registry['thonkify_setting_cache'] = {}
if setting in request.registry['thonkify_setting_cache']:
# NOTE: we don't update caches here because that's the only place it
# could have come from, and it would result in a bunch of memcache set()
# traffic.
return request.registry['thonkify_setting_cache'][setting]
# 2. Try memcache
mc = memcache.get_multi([setting], key_prefix=SETTING_MC_PREFIX)
if setting in mc:
# ... but don't try to update memcache, because we've just got it from there
return _update_caches(setting, mc[setting], skip_memcache=True)
# 3. Try datastore
value = GlobalSetting.get(setting)
if value is not None:
return _update_caches(setting, value)
# 4. Fall back to defaults
if setting in TWEAKABLE_DEFAULTS:
s = TWEAKABLE_DEFAULTS[setting]
return _update_caches(setting, s[0] if isinstance(s, tuple) else s)
# 5. Module-level constant?
if setting[0] in 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' and setting in globals():
return _update_caches(setting, globals()[setting])
# 6. Give up
raise KeyError('Setting "%s" does not exist' % setting)
def get(self):
user = users.get_current_user()
context = {
'login_url': users.create_login_url('/'),
'logout_url': users.create_logout_url('/'),
'is_logged_in': user is not None,
'is_admin': users.is_current_user_admin(),
}
result = memcache.get_multi(['proxies', 'moderated_proxies'])
if 'proxies' in result:
logging.info('proxies cache hit')
context['proxies'] = result['proxies']
else:
logging.info('proxies cache miss')
context['proxies'] = Proxy.all().filter('approved =', True).order('name')
if 'moderated_proxies' in result:
logging.info('moderated proxies cache hit')
context['moderated_proxies'] = result['moderated_proxies']
else:
logging.info('moderated proxies cache miss')
context['moderated_proxies'] = Proxy.all().filter('approved =', False).order('name')
memcache.add_multi({
'proxies': context['proxies'],
'moderated_proxies': context['moderated_proxies'],
})
self.render_response('index.html', context)
def _AuxCheckStart(self, keysets, limit, ratelimiting_enabled,
exception_obj):
for keys in keysets:
count = 0
try:
counters = memcache.get_multi(keys)
count = sum(counters.values())
self.checks.increment({'type': 'success'})
except Exception as e:
logging.error(e)
if not self.fail_open:
self.checks.increment({'type': 'fail_closed'})
raise exception_obj
self.checks.increment({'type': 'fail_open'})
if count > limit:
# Since webapp2 won't let us return a 429 error code
# <http://tools.ietf.org/html/rfc6585#section-4>, we can't
# monitor rate limit exceeded events with our standard tools.
# We return a 400 with a custom error message to the client,
# and this logging is so we can monitor it internally.
logging.info('%s, %d' % (exception_obj.message, count))
self.limit_exceeded.increment()
if ratelimiting_enabled:
self.blocked_requests.increment()
raise exception_obj
k = keys[0]
# Only update the latest *time* bucket for each prefix (reverse chron).
memcache.add(k, 0, time=EXPIRE_AFTER_SECS)
memcache.incr(k, initial_value=0)
def _query_work(self, index, cursor):
"""Queries for work in memcache."""
if cursor:
try:
cursor = int(cursor)
except ValueError:
# This is an old style task that resides in the Datastore, not
# memcache. Use the parent implementation instead.
return super(MemcacheForkJoinQueue,
self)._query_work(index, cursor)
else:
cursor = 0
key_list = [
self._create_index_key(index, n)
for n in xrange(cursor, cursor + self.batch_size)
]
results = memcache.get_multi(key_list)
result_list = []
for key in key_list:
proto = results.get(key)
if not proto:
continue
try:
result_list.append(db.model_from_protobuf(proto))
except ProtocolBuffer.ProtocolBufferDecodeError:
logging.exception(
'Could not decode EntityPb at memcache key %r: %r', key,
proto)
return result_list, cursor + self.batch_size
def _GetNonviewableIIDs(query_project_ids, logged_in_user_id, needed_shard_ids,
rpc_tuples, nonviewable_iids, project_shard_timestamps,
invalidation_timestep, use_cached_searches):
"""Build a set of at-risk IIDs, and accumulate RPCs to get uncached ones."""
if query_project_ids:
keys = []
for pid in query_project_ids:
for sid in needed_shard_ids:
keys.append('%d;%d;%d' % (pid, logged_in_user_id, sid))
else:
keys = [('all;%d;%d' % sid)
for (logged_in_user_id, sid) in needed_shard_ids]
if use_cached_searches:
cached_dict = memcache.get_multi(keys, key_prefix='nonviewable:')
else:
cached_dict = {}
for sid in needed_shard_ids:
if query_project_ids:
for pid in query_project_ids:
_AccumulateNonviewableIIDs(pid, logged_in_user_id, sid,
cached_dict, nonviewable_iids,
project_shard_timestamps,
rpc_tuples, invalidation_timestep)
else:
_AccumulateNonviewableIIDs(None, logged_in_user_id, sid,
cached_dict, nonviewable_iids,
project_shard_timestamps, rpc_tuples,
invalidation_timestep)
def GetImageRecords(photo_ids):
"""Queries the ImageRecord db, w/ memcaching. Returns photo_id -> rec dict"""
# check if we've got the whole thing in memcache
multi_key = VERSION + 'MIR' + ','.join(photo_ids)
recs = memcache.get(multi_key)
if recs: return recs
keys_no_prefix = photo_ids[:]
key_prefix = VERSION + 'IR'
record_map = memcache.get_multi(keys_no_prefix, key_prefix=key_prefix)
missing_ids = list(set(keys_no_prefix) - set(record_map.keys()))
if not missing_ids: return record_map
config = db.create_config(read_policy=db.EVENTUAL_CONSISTENCY)
db_recs = ImageRecord.get_by_key_name(missing_ids, config=config)
memcache_map = {}
for id, r in zip(missing_ids, db_recs):
record_map[id] = r
memcache_map[id] = r
if memcache_map:
memcache.add_multi(memcache_map, key_prefix=key_prefix)
memcache.add(multi_key, record_map)
return record_map
def getThreadPostCounts(forum_threads):
"""Helper for retrieving the post count of a list of threads.
This is more efficient than calling getCounter() on each on individually."""
keynames = []
for forum_thread in forum_threads:
keynames.append("counter:thread:%s:%s:posts" % (forum_thread.forum.slug, forum_thread.slug))
counts = memcache.get_multi(keynames)
for forum_thread in forum_threads:
counter_name = "thread:%s:%s:posts" % (forum_thread.forum.slug, forum_thread.slug)
keyname = "counter:%s" % (counter_name)
if keyname not in counts:
count = 0
for counter in model.forum.ForumShardedCounter.all().filter("name", counter_name):
count += counter.count
counts[keyname] = count
memcache.set(keyname, count)
post_counts = {}
for forum_thread in forum_threads:
keyname = "counter:thread:%s:%s:posts" % (forum_thread.forum.slug, forum_thread.slug)
post_counts["%s:%s" % (forum_thread.forum.slug, forum_thread.slug)] = counts[keyname]
return post_counts
def retrieve(key):
result = memcache.get_multi(['%s.%s' % (key, i) for i in xrange(32)])
logging.debug(result)
serialized = ''.join([v for k, v in sorted(result.items()) if v is not None])
if serialized == '':
return None
return pickle.loads(serialized)
def getTopThreadsPerForum(forums):
"""For each forum, returns the 'top' thread, which we'll display in the forum list page.
The 'top' thread is the most-recently created thread. When you click through to the forum, the
top thread will actually be the thread with the most recent reply, so it's slightly different."""
keynames = []
for forum in forums:
keynames.append("forum:%s:top-thread" % (forum.slug))
cache_mapping = memcache.get_multi(keynames)
# fetch any from the data store that weren't cached
for forum in forums:
keyname = "forum:%s:top-thread" % (forum.slug)
if keyname not in cache_mapping:
query = model.forum.ForumThread.all().filter("forum", forum).order("-posted").fetch(1)
for forum_thread in query:
cache_mapping[keyname] = forum_thread
break
memcache.set_multi(cache_mapping)
# convert from our (internal) memcache key names to a more reasonable key
top_threads = {}
for forum in forums:
keyname = "forum:%s:top-thread" % (forum.slug)
if keyname in cache_mapping:
top_threads[forum.slug] = cache_mapping[keyname]
return top_threads
def get_games():
game_slugs = get_game_slugs()
if game_slugs:
serialized_games = memcache.get_multi(game_slugs, key_prefix='game')
# Checking game in slug and not in cache
missing_slugs = list(game_slugs)
games = []
if serialized_games:
for slug, game in serialized_games.iteritems():
games.append(deserialize(game))
missing_slugs.remove(slug)
if missing_slugs:
query = Game.all()
query.filter('active =', True)
query.filter('slug in', missing_slugs)
missing_games = query.fetch(limit=None)
serialized_games = {}
for game in missing_games:
games.append(game)
serialized_games[game.slug] = serialize(game)
memcache.set_multi(serialized_games, key_prefix='game')
return games
def get_data_from_cache(entity, key_prefix):
tk = []
for k in entity:
tk.append(str(k.urlsafe()))
logging.info(tk)
# get memcache: results
cache_results = memcache.get_multi(
keys=tk, key_prefix=key_prefix)
result = []
memcache_to_add = {}
for wanted in tk:
if not any(r == wanted for r in cache_results):
# 沒有 cache
logging.info('not found')
memcache_to_add[wanted] = ndb.Key(urlsafe=wanted).get()
result.append(memcache_to_add[wanted])
else:
# 有
logging.info('found')
result.append(cache_results[wanted])
logging.info('memcache(s) to add: ' + str(len(memcache_to_add)))
if len(memcache_to_add) > 0:
memcache.add_multi(
memcache_to_add, key_prefix=key_prefix, time=3600)
return result
def load_summary_protos(java_application=False):
"""Load all valid summary records from memcache.
Args:
java_application: Boolean. If true, this function is being invoked
by the download_appstats tool on a java application.
Returns:
A list of StatsProto instances, in reverse chronological order
(i.e. most recent first).
NOTE: This is limited to returning at most config.KEY_MODULUS records,
since there are only that many distinct keys. See also make_key().
"""
tmpl = config.KEY_PREFIX + config.KEY_TEMPLATE + config.PART_SUFFIX
if java_application:
tmpl = '"' + tmpl + '"'
keys = [tmpl % i
for i in
range(0, config.KEY_DISTANCE * config.KEY_MODULUS,
config.KEY_DISTANCE)]
results = memcache.get_multi(keys, namespace=config.KEY_NAMESPACE)
records = []
for rec in results.itervalues():
try:
pb = StatsProto(rec)
except Exception, err:
logging.warn('Bad record: %s', err)
else:
records.append(pb)
def prefetch_posts_list(posts):
prefetch_refprops(posts, Post.user)
posts_keys = [str(post.key()) for post in posts]
# get user, if no user, all already_voted = no
session = get_current_session()
if session.has_key('user'):
user = session['user']
memcache_voted_keys = [
"vp_" + post_key + "_" + str(user.key()) for post_key in posts_keys
]
memcache_voted = memcache.get_multi(memcache_voted_keys)
memcache_to_add = {}
for post in posts:
logging.info("Got a post")
vote_value = memcache_voted.get("vp_" + str(post.key()) + "_" +
str(user.key()))
if vote_value is not None:
post.prefetched_already_voted = vote_value == 1
else:
vote = Vote.all().filter("user ="******"post =", post).fetch(1)
memcache_to_add["vp_" + str(post.key()) + "_" +
str(user.key())] = len(vote)
post.prefetched_already_voted = len(vote) == 1
if memcache_to_add.keys():
memcache.add_multi(memcache_to_add, 3600)
else:
for post in posts:
post.prefetched_already_voted = False
def load_summary_protos():
"""Load all valid summary records from memcache.
Returns:
A list of RequestStatProto instances, in reverse chronological order
(i.e. most recent first).
NOTE: This is limited to returning at most config.KEY_MODULUS records,
since there are only that many distinct keys. See also make_key().
"""
tmpl = '%s%s%s' % (recording.config.KEY_PREFIX,
recording.config.KEY_TEMPLATE,
recording.config.PART_SUFFIX)
keys = [
tmpl % i for i in range(
0, recording.config.KEY_DISTANCE *
recording.config.KEY_MODULUS, recording.config.KEY_DISTANCE)
]
results = memcache.get_multi(keys,
namespace=recording.config.KEY_NAMESPACE)
records = []
for rec in results.itervalues():
try:
pb = protobuf.decode_message(apphosting.RequestStatProto, rec)
except Exception, err:
logging.warn('Bad record: %s', err)
else:
records.append(pb)
def _query_work(self, index, cursor):
"""Queries for work in memcache."""
if cursor:
try:
cursor = int(cursor)
except ValueError:
# This is an old style task that resides in the Datastore, not
# memcache. Use the parent implementation instead.
return super(MemcacheForkJoinQueue, self)._query_work(index, cursor)
else:
cursor = 0
key_list = [self._create_index_key(index, n)
for n in xrange(cursor, cursor + self.batch_size)]
results = memcache.get_multi(key_list)
result_list = []
for key in key_list:
proto = results.get(key)
if not proto:
continue
try:
result_list.append(db.model_from_protobuf(proto))
except ProtocolBuffer.ProtocolBufferDecodeError:
logging.exception('Could not decode EntityPb at memcache key %r: %r',
key, proto)
return result_list, cursor + self.batch_size
def task(stories):
def check_story(rpc):
try:
result = rpc.get_result()
story = json.loads(result.content)
if story and story.get('score') >= SCORE_THRESHOLD:
StoryPost.add(story)
elif story:
logging.info(
'STOP: {id} has low score ({score})'.format(**story))
else:
logging.info('STOP: story was probably deleted/flagged')
except urlfetch.DownloadError as ex:
logging.exception(ex)
except ValueError as ex:
logging.info(result.content)
logging.exception(ex)
# stringify ids for use in memcache and convert to set for later
ids = set(str(story_id) for story_id in stories)
logging.info('checking stories: {}'.format(ids))
# get stories that we already posted to reduce the number of requests
cached_stories = set(memcache.get_multi(ids).keys())
logging.info('cached stories: {}'.format(cached_stories))
# remove stories we know about from stories that we need to check
stories_to_check = ids.difference(cached_stories)
rpcs = map(lambda id: item_async(id, check_story), stories_to_check)
for rpc in rpcs:
rpc.wait()
def _get_tasklet(self, todo):
assert todo
# First check memcache.
keys = set(key for _, key in todo)
memkeymap = dict((key, key.urlsafe())
for key in keys if self.should_memcache(key))
if memkeymap:
results = memcache.get_multi(memkeymap.values())
leftover = []
## del todo[1:] # Uncommenting this creates an interesting bug.
for fut, key in todo:
mkey = memkeymap[key]
if mkey in results:
pb = results[mkey]
ent = self._conn.adapter.pb_to_entity(pb)
fut.set_result(ent)
else:
leftover.append((fut, key))
todo = leftover
if todo:
keys = [key for (_, key) in todo]
# TODO: What if async_get() created a non-trivial MultiRpc?
results = yield self._conn.async_get(None, keys)
for ent, (fut, _) in zip(results, todo):
fut.set_result(ent)
def generate_feed(uid):
subscriptions = Subscription.query(Subscription.uid == uid).fetch(200)
subscription_urls = [sub.url for sub in subscriptions if sub.url]
if len(subscription_urls) > 0:
sources = Source.query(Source.url.IN(subscription_urls)).order(-Source.most_recent_article_added_date).fetch(len(subscription_urls))
source_jsons = {}
for source_json in memcache.get_multi([source.feed_cache_key() for source in sources]).itervalues():
source_jsons[source_json['id']] = source_json
to_fetch = [source for source in sources if source.key.id() not in source_jsons]
print 'HITS {0} TO_FETCH {1}'.format(len(source_jsons), len(to_fetch))
if len(to_fetch):
source_promises = [src.json(include_articles=True, article_limit=FEED_ARTICLE_LIMIT, return_promise=True) for src in to_fetch]
for promise in source_promises:
data = promise()
source_jsons[data['id']] = data
# put the cache keys:
if len(to_fetch):
memcache.set_multi({source.feed_cache_key(): source_jsons[source.key.id()] for source in to_fetch if (source.key.id() in source_jsons)})
source_json = [source_jsons[source.key.id()] for source in sources if source.key.id() in source_jsons]
else:
source_json = []
return {
"sources": source_json
}
def _render(self, year):
year = int(year)
avatars = []
shards = memcache.get_multi(['{}avatars_{}'.format(year, i) for i in xrange(10)])
if len(shards) == 10: # If missing a shard, must refetch all
for _, shard in sorted(shards.items(), key=lambda kv: kv[0]):
avatars += shard
if not avatars:
avatars_future = Media.query(Media.media_type_enum == MediaType.AVATAR, Media.year == year).fetch_async()
avatars = sorted(avatars_future.get_result(), key=lambda a: int(a.references[0].id()[3:]))
shards = {}
size = len(avatars) / 10 + 1
for i in xrange(10):
start = i * size
end = start + size
shards['{}avatars_{}'.format(year, i)] = avatars[start:end]
memcache.set_multi(shards, 60*60*24)
self.template_values.update({
'year': year,
'avatars': avatars,
})
return jinja2_engine.render('avatars.html', self.template_values)
def get(self, key):
logs.log('MemcacheLarge get %s.' % key)
value_len = memcache.get(key)
if not value_len:
return value_len
value_len = int(value_len)
keys = [
'%s-%s-%s' % (self.MAGIC_STR, key, chunk_start)
for chunk_start in xrange(0, value_len, self.CHUNK_LEN)
]
keys_and_values = memcache.get_multi(keys).items()
def get_chunk_start(key_and_value):
full_key = key_and_value[0]
key_without_chunk_start = '%s-%s-' % (self.MAGIC_STR, key)
return int(full_key[len(key_without_chunk_start):])
string_value = ''.join(
value
for key, value in sorted(keys_and_values, key=get_chunk_start))
string_len = len(string_value)
if string_len != value_len:
logs.log_error(
'Unable to retrieve %s. Expected length: %s. actual: %s' %
(key, value_len, string_len))
return None
try:
return json.loads(string_value)
except ValueError:
logs.log_error('Unable to retrieve ' + key)
return None
def GetImageRecords(photo_ids):
"""Queries the ImageRecord db, w/ memcaching. Returns photo_id -> rec dict"""
# check if we've got the whole thing in memcache
keys_no_prefix = photo_ids[:]
if MEMCACHE_ENABLED:
multi_key = VERSION + 'MIR' + ','.join(photo_ids)
recs = memcache.get(multi_key)
if recs: return recs
key_prefix = VERSION + 'IR'
record_map = memcache.get_multi(keys_no_prefix, key_prefix=key_prefix)
missing_ids = list(set(keys_no_prefix) - set(record_map.keys()))
if not missing_ids: return record_map
else:
missing_ids = keys_no_prefix
record_map = {}
config = db.create_config(read_policy=db.EVENTUAL_CONSISTENCY)
db_recs = ImageRecord.get_by_key_name(missing_ids, config=config)
memcache_map = {}
for id, r in zip(missing_ids, db_recs):
record_map[id] = r
memcache_map[id] = r
if MEMCACHE_ENABLED and memcache_map:
memcache.add_multi(memcache_map, key_prefix=key_prefix)
memcache.add(multi_key, record_map)
return record_map
