ail-framework/bin/ZMQ_PubSub_Lines_Q.py

#!/usr/bin/env python2
# -*-coding:UTF-8 -*
"""
The ZMQ_PubSub_Line_Q 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.

Requirements
------------

*Running Redis instances.
*Should register to the Publisher "ZMQ_Feed"

"""

import redis
import ConfigParser
from pubsublogger import publisher
from packages import ZMQ_PubSub

configfile = './packages/config.cfg'


def main():
    """Main Function"""

    # CONFIG #
    cfg = ConfigParser.ConfigParser()
    cfg.read(configfile)

    # REDIS #
    r_serv = redis.StrictRedis(
        host=cfg.get("Redis_Queues", "host"),
        port=cfg.getint("Redis_Queues", "port"),
        db=cfg.getint("Redis_Queues", "db"))

    # LOGGING #
    publisher.channel = "Queuing"

    # ZMQ #
    channel = cfg.get("PubSub_Global", "channel")
    subscriber_name = "line"

    sub = ZMQ_PubSub.ZMQSub(configfile, "PubSub_Global", channel, subscriber_name)

    # FUNCTIONS #
    publisher.info("""Suscribed to channel {0}""".format(channel))

    while True:
        sub.get_and_lpush(r_serv)

        if r_serv.sismember("SHUTDOWN_FLAGS", "Lines_Q"):
            r_serv.srem("SHUTDOWN_FLAGS", "Lines_Q")
            print "Shutdown Flag Up: Terminating"
            publisher.warning("Shutdown Flag Up: Terminating.")
            break

if __name__ == "__main__":
    main()