#!/usr/bin/env python3
# -*-coding:UTF-8 -*
"""
Queue helper module
============================
This module subscribe to a Publisher stream and put the received messages
into a Redis-list waiting to be popped later by others scripts.
..note:: Module ZMQ_Something_Q and ZMQ_Something are closely bound, always put
the same Subscriber name in both of them.
"""
import redis
import configparser
import os
import zmq
import time
import datetime
import json
class PubSub(object): ## TODO: remove config, use ConfigLoader by default
def __init__(self):
configfile = os.path.join(os.environ['AIL_HOME'], 'configs/core.cfg')
if not os.path.exists(configfile):
raise Exception('Unable to find the configuration file. \
Did you set environment variables? \
Or activate the virtualenv.')
self.config = configparser.ConfigParser()
self.config.read(configfile)
self.redis_sub = False
self.zmq_sub = False
self.subscribers = None
self.publishers = {'Redis': [], 'ZMQ': []}
def setup_subscribe(self, conn_name):
if self.config.has_section(conn_name):
channel = self.config.get(conn_name, 'channel')
else:
channel = conn_name.split('_')[1]
if conn_name.startswith('Redis'):
self.redis_sub = True
r = redis.StrictRedis(
host=self.config.get('RedisPubSub', 'host'),
port=self.config.get('RedisPubSub', 'port'),
db=self.config.get('RedisPubSub', 'db'),
decode_responses=True)
self.subscribers = r.pubsub(ignore_subscribe_messages=True)
self.subscribers.psubscribe(channel)
elif conn_name.startswith('ZMQ'):
self.zmq_sub = True
context = zmq.Context()
# Get all feeds
self.subscribers = []
addresses = self.config.get(conn_name, 'address')
for address in addresses.split(','):
subscriber = context.socket(zmq.SUB)
subscriber.connect(address)
subscriber.setsockopt_string(zmq.SUBSCRIBE, channel)
self.subscribers.append(subscriber)
def setup_publish(self, conn_name):
if self.config.has_section(conn_name):
channel = self.config.get(conn_name, 'channel')
else:
channel = conn_name.split('_')[1]
if conn_name.startswith('Redis'):
r = redis.StrictRedis(host=self.config.get('RedisPubSub', 'host'),
port=self.config.get('RedisPubSub', 'port'),
db=self.config.get('RedisPubSub', 'db'),
decode_responses=True)
self.publishers['Redis'].append((r, channel))
elif conn_name.startswith('ZMQ'):
context = zmq.Context()
p = context.socket(zmq.PUB)
p.bind(self.config.get(conn_name, 'address'))
self.publishers['ZMQ'].append((p, channel))
def publish(self, message):
m = json.loads(message)
channel_message = m.get('channel')
for p, channel in self.publishers['Redis']:
if channel_message is None or channel_message == channel:
p.publish(channel, ( m['message']) )
for p, channel in self.publishers['ZMQ']:
if channel_message is None or channel_message == channel:
p.send('{} {}'.format(channel, m['message']))
#p.send(b' '.join( [channel, mess] ) )
def subscribe(self):
if self.redis_sub:
for msg in self.subscribers.listen():
if msg.get('data', None) is not None:
yield msg['data']
elif self.zmq_sub:
# Initialize poll set
poller = zmq.Poller()
for subscriber in self.subscribers:
poller.register(subscriber, zmq.POLLIN)
while True:
socks = dict(poller.poll())
for subscriber in self.subscribers:
if subscriber in socks:
message = subscriber.recv()
yield message.split(b' ', 1)[1]
else:
raise Exception('No subscribe function defined')
class Process(object):
def __init__(self, conf_section, module=True):
configfile = os.path.join(os.environ['AIL_HOME'], 'configs/core.cfg')
if not os.path.exists(configfile):
raise Exception('Unable to find the configuration file. \
Did you set environment variables? \
Or activate the virtualenv.')
modulesfile = os.path.join(os.environ['AIL_BIN'], 'packages/modules.cfg')
self.config = configparser.ConfigParser()
self.config.read(configfile)
self.modules = configparser.ConfigParser()
self.modules.read(modulesfile)
self.subscriber_name = conf_section
self.pubsub = None
if module:
if self.modules.has_section(conf_section):
self.pubsub = PubSub()
else:
raise Exception('Your process has to listen to at least one feed.')
self.r_temp = redis.StrictRedis(
host=self.config.get('RedisPubSub', 'host'),
port=self.config.get('RedisPubSub', 'port'),
db=self.config.get('RedisPubSub', 'db'),
decode_responses=True)
self.serv_statistics = redis.StrictRedis(
host=self.config.get('ARDB_Statistics', 'host'),
port=self.config.get('ARDB_Statistics', 'port'),
db=self.config.get('ARDB_Statistics', 'db'),
decode_responses=True)
self.moduleNum = os.getpid()
def populate_set_in(self):
# monoproc
try:
src = self.modules.get(self.subscriber_name, 'subscribe')
except configparser.NoOptionError: #NoSectionError
src = None
if src != 'Redis' and src:
self.pubsub.setup_subscribe(src)
for msg in self.pubsub.subscribe():
in_set = self.subscriber_name + 'in'
self.r_temp.sadd(in_set, msg)
self.r_temp.hset('queues', self.subscriber_name,
int(self.r_temp.scard(in_set)))
else:
print('{} has no subscriber'.format(self.subscriber_name))
def get_from_set(self):
# multiproc
in_set = self.subscriber_name + 'in'
self.r_temp.hset('queues', self.subscriber_name,
int(self.r_temp.scard(in_set)))
message = self.r_temp.spop(in_set)
timestamp = int(time.mktime(datetime.datetime.now().timetuple()))
dir_name = os.environ['AIL_HOME']+self.config.get('Directories', 'pastes')
if message is None:
return None
else:
try:
if '.gz' in message:
path = message.split(".")[-2].split("/")[-1]
#find start of path with AIL_HOME
index_s = message.find(os.environ['AIL_HOME'])
#Stop when .gz
index_e = message.find(".gz")+3
if(index_s == -1):
complete_path = message[0:index_e]
else:
complete_path = message[index_s:index_e]
else:
path = "-"
complete_path = "?"
value = str(timestamp) + ", " + path
self.r_temp.set("MODULE_"+self.subscriber_name + "_" + str(self.moduleNum), value)
self.r_temp.set("MODULE_"+self.subscriber_name + "_" + str(self.moduleNum) + "_PATH", complete_path)
self.r_temp.sadd("MODULE_TYPE_"+self.subscriber_name, str(self.moduleNum))
curr_date = datetime.date.today()
self.serv_statistics.hincrby(curr_date.strftime("%Y%m%d"),'paste_by_modules_in:'+self.subscriber_name, 1)
return message
except:
print('except')
path = "?"
value = str(timestamp) + ", " + path
self.r_temp.set("MODULE_"+self.subscriber_name + "_" + str(self.moduleNum), value)
self.r_temp.set("MODULE_"+self.subscriber_name + "_" + str(self.moduleNum) + "_PATH", "?")
self.r_temp.sadd("MODULE_TYPE_"+self.subscriber_name, str(self.moduleNum))
return message
def populate_set_out(self, msg, channel=None):
# multiproc
msg = {'message': msg}
if channel is not None:
msg.update({'channel': channel})
# bytes64 encode bytes to ascii only bytes
j = json.dumps(msg)
self.r_temp.sadd(self.subscriber_name + 'out', j)
def publish(self):
# monoproc
if not self.modules.has_option(self.subscriber_name, 'publish'):
return False
dest = self.modules.get(self.subscriber_name, 'publish')
# We can have multiple publisher
for name in dest.split(','):
self.pubsub.setup_publish(name)
while True:
message = self.r_temp.spop(self.subscriber_name + 'out')
if message is None:
time.sleep(1)
continue
self.pubsub.publish(message)
def incr_module_timeout_statistic(self):
curr_date = datetime.date.today()
self.serv_statistics.hincrby(curr_date.strftime("%Y%m%d"),'paste_by_modules_timeout:'+self.subscriber_name, 1)