mirror of https://github.com/CIRCL/AIL-framework
158 lines
6.0 KiB
Python
Executable File
158 lines
6.0 KiB
Python
Executable File
#!/usr/bin/env python2
|
|
# -*-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 json
|
|
|
|
|
|
class PubSub(object):
|
|
|
|
def __init__(self):
|
|
configfile = os.path.join(os.environ['AIL_BIN'], 'packages/config.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.subscriber = 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'))
|
|
self.subscriber = r.pubsub(ignore_subscribe_messages=True)
|
|
self.subscriber.psubscribe(channel)
|
|
elif conn_name.startswith('ZMQ'):
|
|
self.zmq_sub = True
|
|
context = zmq.Context()
|
|
self.subscriber = context.socket(zmq.SUB)
|
|
self.subscriber.connect(self.config.get(conn_name, 'address'))
|
|
self.subscriber.setsockopt(zmq.SUBSCRIBE, channel)
|
|
|
|
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'))
|
|
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']))
|
|
|
|
def subscribe(self):
|
|
if self.redis_sub:
|
|
for msg in self.subscriber.listen():
|
|
if msg.get('data', None) is not None:
|
|
yield msg['data']
|
|
elif self.zmq_sub:
|
|
while True:
|
|
msg = self.subscriber.recv()
|
|
yield msg.split(' ', 1)[1]
|
|
else:
|
|
raise Exception('No subscribe function defined')
|
|
|
|
|
|
class Process(object):
|
|
|
|
def __init__(self, conf_section):
|
|
configfile = os.path.join(os.environ['AIL_BIN'], 'packages/config.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 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'))
|
|
|
|
def populate_set_in(self):
|
|
# monoproc
|
|
src = self.modules.get(self.subscriber_name, 'subscribe')
|
|
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)))
|
|
|
|
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)))
|
|
return self.r_temp.spop(in_set)
|
|
|
|
def populate_set_out(self, msg, channel=None):
|
|
# multiproc
|
|
msg = {'message': msg}
|
|
if channel is not None:
|
|
msg.update({'channel': channel})
|
|
self.r_temp.sadd(self.subscriber_name + 'out', json.dumps(msg))
|
|
|
|
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)
|