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