def check_orphan(self, gid, at_time):
""" returns true if gid is orphaned """
#get last requested timestamp
requested_str = self.rc.hget(S1.cache_key(gid),
S1.cache_requested_key())
if not requested_str:
return False
# compare to orphaned timeout
if at_time - float(requested_str) < config.DEFAULT_ORPHANED_TIMEOUT:
return False
return True
def run(self, *args, **kwargs):
self.logger.info('Publisher [{0}], starting...'.format(self.name))
callback = {
S1.msg_publish(): self._on_publish_updates,
S1.msg_register(): self._on_register,
S1.msg_update_avatar(): self._on_update_avatar,
}
channels = [S1.publisher_channel_name('all'), S1.publisher_channel_name(self.name)]
channels.extend([name for name in self.providers.keys() if name != self.name])
# this will start infinite loop (in Pubsub)
self.listener(channels, callback)
self.logger.warning('Publisher [{0}], listener exit!'.format(self.name))
def schedule_next_batch(self, allow_worker_start=False):
try:
self.logger.info('[{0}] wake up!'.format(self.name))
# get the gid set until all processed
while True:
at_time = time.time()
gid_set = self.data.balancer.get_next_poll_set(at_time +
self.period_s /
2.0)
gid_set_len = len(gid_set)
if not gid_set_len:
self.logger.warning('[{0}] Empty gid_set...'.format(
self.name))
return
elif allow_worker_start and gid_set_len > self.gid_set_threshold:
self.logger.warning(
'Gid set count [{0}] above threshold, starting worker...'
.format(gid_set_len))
self.start_worker()
self.logger.info(
'[{0}] Invoking poll for [{1}] items...'.format(
self.name, gid_set_len))
# clean orphaned gids
update_set = [
gid for gid in gid_set
if not self.data.check_orphan(gid, at_time)
]
# post each gid to poller
for gid in update_set:
# move next poll time for the gid to avoid duplicate polling
self.data.balancer.add_gid_set(gid,
at_time + self.gid_poll_s)
# post to pollers
self.broadcast_command(S1.poller_channel_name('all'),
S1.msg_update(), gid)
# update stats
self.update_stats(at_time, len(update_set))
except Exception as e:
self.logger.warning('Exception in poller driver: {0}'.format(e))
self.logger.exception(traceback.format_exc())
self.data.unregister_poller(self.name)
def run(self, *args, **kwargs):
self.kwargs = kwargs
cfg = config.load_config(kwargs['config_path'], 'poller.json')
self.gid_poll_s = cfg[
'gid_poll_s'] if 'gid_poll_s' in cfg else self.gid_poll_s
self.period_s = cfg['period_s'] if 'period_s' in cfg else self.period_s
self.workers_min = cfg[
'workers_min'] if 'workers_min' in cfg else self.workers_min
self.workers_max = cfg[
'workers_max'] if 'workers_max' in cfg else self.workers_max
self.logger.info(
'Poller v[{0}], name=[{1}], poll delay=[{2}]s, period=[{3}]s starting...'
.format(config.version, self.name, self.gid_poll_s, self.period_s))
# give pub sub some time... not using syncho notifications...
time.sleep(1)
# register self as poller
self.data.register_poller(self.name)
# start worker processes
for n in range(0, self.workers_min):
self.start_worker()
# drop message to self to do immediate poll round
self.broadcast_data(S1.poller_channel_name(self.name), '#')
# start listening
self.listener([
S1.poller_channel_name('all-out'),
S1.poller_channel_name(self.name)
],
None,
timeout=self.period_s)
self.logger.warning('Poller master listener exit!')
# un-register self
self.data.unregister_poller(self.name)
# force kill any remaining workers
while self.workers:
p = self.workers.popitem()
self.logger.warning('Terminating remaining poller {0}!'.format(
p[0]))
p[1].terminate()
self.logger.warning('Poller master process exit!')
def _is_key_in_stamp(key, stamp, spread_minutes):
try:
minute = int(S1.get_minute_fmt_minute(key))
stamp_minute = stamp / 60 % 1440
return (stamp_minute - spread_minutes) <= minute <= (
stamp_minute + spread_minutes)
except:
return False
def __init__(self, logger, name, data, provider_names, config_path, dummy=False):
"""
@type data: Data
@type logger: Logger
@type provider_names: list
"""
super(Publisher, self).__init__(logger, name, data, provider_names, config_path, dummy)
self.providers = {S1.publisher_channel_name(p): PublisherProviders.create(p, logger, data, config_path)
for p in provider_names}
def dump_gids(self):
total = 0
c = self.data.rc.hscan(S1.destination_key_fmt('children'))
while len(c) > 1 and c[1]:
total += len(c[1])
for gid in c[1]:
self.dump_gid(gid)
# check if the next cursor is zero
if c[0] == '0' or c[0] == 0:
break
# grab next set
c = self.data.rc.hscan(S1.destination_key_fmt('children'), c[0])
# sleep 10 sec before retry
print('End of gid_set, total [{0}] GIDs.'.format(total))
self.data_d.rc.delete(S1.register_set())
print('Cleared register set.')
def dump_source(self, master_gid, gid):
print('Copying source [{0}:{1}]...'.format(master_gid, gid))
# add child gid to pollers first
self.data_d.register_gid(gid)
# add the gid from the list of child accounts
print('Linking GID: [{0}]m <-- [{1}]s'.format(master_gid, gid))
self.data_d.add_linked_account(master_gid, gid)
destinations = self.data.get_destinations(gid)
self.log.debug('{"dest": [')
c = 0
for destination in destinations:
users = self.data.get_destination_users(gid, destination)
for user in users:
if c != 0:
self.log.debug(',')
# dump destination
self.dump_destination(master_gid, gid, destination, user)
c += 1
self.log.debug('],')
# dump gid data keys
self.log.debug('"keys": [')
self.log.debug('"{0},"'.format(S1.gid_key(gid)))
self.log.debug('"{0},"'.format(S1.gid_log_key(gid)))
self.log.debug('"{0},"'.format(S1.links_key(gid)))
self.log.debug('"{0}"'.format(S1.cache_key(gid)))
self.log.debug(']}')
# copy keys
self.copy_hash(S1.gid_key(gid))
self.copy_zset(S1.gid_log_key(gid))
self.copy_hash(S1.cache_key(gid))
self.copy_set(S1.links_key(gid))
# copy tokens for all linked destinations (will overwrite some data)
links = self.data.get_linked_accounts(master_gid) or dict()
for k in links:
# copy token
p = k.split(':')
if not p[0] in self.data.provider:
continue
token = self.data.get_user_token(gid, p[0], p[1])
self.data_d.set_user_token(gid, p[0], p[1], token)
# copy user params
for p_name in S1.PROVIDER_PARAMS:
p_val = self.data.provider[p[0]].get_user_param(p[1], p_name)
if p_val:
self.data_d.provider[p[0]].set_user_param(p[1], p_name, p_val)
def get_next_poll_set(self, up_to_epoch):
"""
grabs a range up to current time() from 'all' gid set
@return: batch of gids to process or None if cursor reset is required
"""
return self.rc.zrangebyscore(S1.gid_set('all'),
0,
up_to_epoch,
start=0,
num=200,
withscores=False)
def on_terminate(self, *args, **kwargs):
"""
Called by signal handlers from ServiceBase
WARNING: This can be called multiple times during process termination!
"""
self.logger.warning('Poller master is terminating...')
# stop workers
while self.stop_worker():
self.logger.warning('One worker stopped')
# stop self
self.send_exit(S1.poller_channel_name(self.name), self_target=True)
self.logger.warning('Poller master terminate sequence complete!')
def __init__(self,
logger,
name,
data,
providers,
config_path,
dummy=False):
"""
@type logger: Logger
@type data: Data
"""
super(Poller, self).__init__(logger, name, data, providers,
config_path)
self.kwargs = None
# default poller driver period
self.period_s = 2
# how many gids are allowed to expire in period_s before new worker is launched
self.gid_set_threshold = 100
# number of worker processes
self.workers_min = 3
# max number of worker process
self.workers_max = 4
# default gid poll period, 10 min
self.gid_poll_s = 600
# default no poll period, 30 min
self.gid_no_poll_s = 1800
self.started_at = time.time()
self.stats = {
'hour': (self.started_at, 0),
'day': (self.started_at, 0),
}
self.channel_handler = {
S1.poller_channel_name('all-out'): self.on_all_out,
S1.poller_channel_name(self.name): self.on_my_name
}
def dump_gid(self, gid):
print('Dumping user, GID: {0}'.format(gid))
# get child bindings for this account
children = set(self.data.get_destination_users(gid, 'children'))
if not children or (len(children) == 1 and gid in children):
if not self.data.rc.exists(S1.cache_key(gid)):
print('****** SELF CHILD + NO CACHE, SKIPPED, GID: {0}'.format(gid))
return
# just to be safe
children.add(gid)
for child in children:
self.dump_source(gid, child)
def is_cache(self, gid, option):
#check last requested timestamp
#get last request timestamp and filter
requested_str = self.rc.hget(S1.cache_key(gid),
S1.cache_requested_key())
last_filter = self.rc.hget(S1.cache_key(gid), S1.cache_filter_key())
#save last request time and filter
self.rc.hset(S1.cache_key(gid), S1.cache_requested_key(), time.time())
self.rc.hset(S1.cache_key(gid), S1.cache_filter_key(), option)
if requested_str:
if (not last_filter or option == last_filter) and time.time(
) - float(requested_str) < config.DEFAULT_FORCE_MISS_TIMEOUT:
self.logger.warning('Force-request detected [{0}]'.format(gid))
else:
# cache hit
return True
else:
self.logger.warning('New user detected [{0}]'.format(gid))
# cache miss
return False
def add_gid_set(self, gid, at_epoch):
self.rc.zadd(S1.gid_set('all'), gid, at_epoch)
def process_activities_doc(self, gid, activities_doc, force=False):
# validate received data
updated = GoogleRSS.get_update_timestamp(activities_doc)
if not updated:
self.logger.warning(
'Received empty data set for [{0}]'.format(gid))
return
# set last successful poll timestamp
# users with no posts in Google Plus feeds will not be able to connect
# as FE monitors this timestamp before accepting new account link
self.data.cache.set_poll_stamp(gid, time.time())
# set cache-specific meta-data
last_updated = self.data.get_destination_update(gid, 'cache', gid)
self.logger.info(
'Received data for [{0}], updated [{1}], last_updated [{2}]'.
format(gid, updated, last_updated))
if updated < last_updated:
# Incomplete data?
self.logger.warning('Warning: Updated timestamp jumped to past!')
return
# check if new update is in
last_etag = self.data.get_destination_param(gid, 'cache', gid,
S1.etag_key())
etag = GoogleRSS.get_item_etag(activities_doc)
if not force and last_etag == etag:
self.logger.debug('Same data for {0}, last_updated={1}'.format(
gid, last_updated))
return
# save etag
self.data.set_destination_param(gid, 'cache', gid, S1.etag_key(), etag)
# set cache destination updated
self.data.set_destination_update(gid, 'cache', gid, updated)
# shorten reshares urls
items = GoogleRSS.get_updated_since(activities_doc, last_updated)
shorten = self.data.get_gid_shorten_urls(gid)
urls = set([
item for item in items
if shorten or GoogleRSS.get_item_is_share(item)
for item in GoogleRSS.get_long_urls(item)
])
for url in urls:
u = self.data.cache.get_short_url(url)
if not u:
u = self.shortener.get_short_url(url)
self.data.cache.cache_short_url(url, u)
# store the dataset
self.data.cache.cache_activities_doc(gid, activities_doc)
# notify publishers
self.data.flush_updates(gid)
# process stats data
# new user ?
if not last_updated:
self.logger.warning(
'Building new user activity map for {0}'.format(gid))
self._build_user_activity_map(gid, activities_doc)
# fake an update now as user is likely online when this code is executed
self.data.cache.incr_num_minute_updates(gid, time.time())
elif last_updated < updated:
# increment update count for this minute
self.logger.debug(
'Updating user activity map for {0}, data updated={1}'.format(
gid, updated))
self._build_user_activity_map(gid,
activities_doc,
last_updated=last_updated)
else:
self.logger.debug(
'No activity map updates for {0}, data updated={1}'.format(
gid, updated))
def root_key(self, user):
return S1.provider_root_key(self.name, user)
def set_poll_stamp(self, gid, stamp):
self.rc.hset(S1.cache_key(gid), S1.polled_key(), stamp)
def reset_cache(self, gid):
self.set_poll_stamp(gid, 0)
self.rc.hset(S1.cache_key(gid), S1.cache_requested_key(), time.time())
def _stop_worker(self, p):
self.logger.info('Stopping worker: {0}...'.format(p[0]))
self.data.unregister_poller(p[0])
self.send_exit(S1.poller_channel_name(p[0]))
p[1].join()
def set_gid_max_results(self, gid, max_results):
return self.rc.hset(S1.cache_key(gid), S1.cache_max_results_key(),
max_results)
def get_gid_max_results(self, gid):
return self.get_hfield(S1.cache_key(gid), S1.cache_max_results_key(),
config.DEFAULT_MAX_RESULTS)
def get_short_url(self, url):
return self.rc.hget(S1.cache_url_key(), url)
def cache_short_url(self, url, short_url):
return self.rc.hset(S1.cache_url_key(), url, short_url)
def get_num_minute_updates(self, gid, stamp, spread_minutes):
keys = self.rc.hkeys(S1.cache_key(gid))
return sum([
self.hget_int(S1.cache_key(gid), k) for k in keys
if self._is_key_in_stamp(k, stamp, spread_minutes)
])
def incr_num_minute_updates(self, gid, stamp):
# get the minute of the day
minute = (stamp / 60) % 1440
self.rc.hincrby(S1.cache_key(gid), S1.updated_minute_fmt(minute))
def get_next_registered(self):
return self.rc.spop(S1.register_set())
logging.basicConfig(format='%(asctime)s %(message)s',
datefmt='%m/%d/%Y %H:%M:%S')
logger = logging.getLogger(__name__)
logger.addHandler(
config.getLogHandler(os.path.join(args.log_path, 'poller_test.log')))
logger.level = logging.DEBUG
db = data.Data(logger, args.redis_host, args.redis_port, args.redis_db)
while True:
logger.warning(
'Invoking registration for all, next poll in {0} seconds'.format(
args.period))
with open(args.gid_set) as f_set:
gid_set = [gid.strip() for gid in f_set.readlines()]
logger.info('Read [{0}] gids'.format(len(gid_set)))
for n in range(0, len(gid_set)):
gid = gid_set[randint(0, len(gid_set) - 1)]
logger.info('Invoking registration for [{0}]'.format(gid))
db.pubsub.broadcast_command(S1.publisher_channel_name('twitter'),
S1.msg_register(), gid)
t = randint(5, 20)
logger.info('Sleeping for [{0}]'.format(t))
time.sleep(t)
#get delay and wait
time.sleep(args.period)
def get_activities(self, gid):
str_value = self.rc.hget(S1.cache_key(gid), S1.cache_items_key())
return json.loads(str_value) if str_value else None
parser.add_argument('--period', default=60, type=int)
args = parser.parse_args()
logging.basicConfig(format='%(asctime)s %(message)s',
datefmt='%m/%d/%Y %H:%M:%S')
logger = logging.getLogger(__name__)
logger.addHandler(
config.getLogHandler(os.path.join(args.log_path, 'poller_test.log')))
logger.level = logging.DEBUG
data = data.Data(logger, args.redis_host, args.redis_port, args.redis_db)
while True:
logger.warning(
'Invoking poll for all, next poll in {0} seconds'.format(
args.period))
with open(args.gid_set) as f_set:
gid_set = [gid.strip() for gid in f_set.readlines()]
logger.info('Read [{0}] gids'.format(len(gid_set)))
for n in range(0, len(gid_set)):
gid = gid_set[randint(0, len(gid_set) - 1)]
logger.info('Invoking rebalance for [{0}]'.format(gid))
data.rc.sadd(S1.register_set(), gid)
data.register_gid(gid)
t = randint(5, 20)
logger.info('Sleeping for [{0}]'.format(t))
time.sleep(t)
#get delay and wait
time.sleep(args.period)
def get_poll_stamp(self, gid):
polled_str = self.rc.hget(S1.cache_key(gid), S1.polled_key())
if polled_str:
return float(polled_str)
return 0