AIL-framework/bin/ZMQ_Feed.py

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#!/usr/bin/env python2
# -*-coding:UTF-8 -*
"""
The ZMQ_Feed_Q Module
=====================
This module is consuming the Redis-list created by the ZMQ_Feed_Q Module,
And save the paste on disk to allow others modules to work on them.
..todo:: Be able to choose to delete or not the saved paste after processing.
..todo:: Store the empty paste (unprocessed) somewhere in Redis.
..note:: Module ZMQ_Something_Q and ZMQ_Something are closely bound, always put
the same Subscriber name in both of them.
Requirements
------------
*Need running Redis instances.
*Need the ZMQ_Feed_Q Module running to be able to work properly.
"""
import redis
import ConfigParser
import base64
import os
import time
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"))
# ZMQ #
channel = cfg.get("Feed", "topicfilter")
# Subscriber
subscriber_name = "feed"
subscriber_config_section = "Feed"
# Publisher
publisher_name = "pubfed"
publisher_config_section = "PubSub_Global"
Sub = ZMQ_PubSub.ZMQSub(configfile, subscriber_config_section, channel, subscriber_name)
PubGlob = ZMQ_PubSub.ZMQPub(configfile, publisher_config_section, publisher_name)
# LOGGING #
publisher.channel = "Script"
publisher.info("Feed Script started to receive & publish.")
while True:
message = Sub.get_msg_from_queue(r_serv)
# Recovering the streamed message informations.
if message is not None:
if len(message.split()) == 3:
topic, paste, gzip64encoded = message.split()
print paste
else:
# TODO Store the name of the empty paste inside a Redis-list.
print "Empty Paste: not processed"
publisher.debug("Empty Paste: {0} not processed".format(paste))
continue
else:
if r_serv.sismember("SHUTDOWN_FLAGS", "Feed"):
r_serv.srem("SHUTDOWN_FLAGS", "Feed")
print "Shutdown Flag Up: Terminating"
publisher.warning("Shutdown Flag Up: Terminating.")
break
print "Empty Queues: Waiting..."
time.sleep(10)
continue
# Creating the full filepath
filename = cfg.get("Directories", "pastes") + paste
if not os.path.exists(filename.rsplit("/", 1)[0]):
os.makedirs(filename.rsplit("/", 1)[0])
else:
# Path already existing
pass
decoded_gzip = base64.standard_b64decode(gzip64encoded)
# paste, zlib.decompress(decoded_gzip, zlib.MAX_WBITS|16)
with open(filename, 'wb') as F:
F.write(decoded_gzip)
msg = cfg.get("PubSub_Global", "channel")+" "+filename
PubGlob.send_message(msg)
publisher.debug("{0} Published".format(msg))
if __name__ == "__main__":
main()