def subscriber_manager(context):
global subscriber
global publisher
global subscriber_topics
session = Session()
# Set up forwarder device
logger.debug("Configuring forwarder device")
forwarder_subscriber_address = session.query(RoutingDefiniton.route) \
.filter_by(name="internal_pub") \
.scalar()
forwarder_publisher_address = session.query(RoutingDefiniton.route) \
.filter_by(name="internal_sub") \
.scalar()
forwarder = ProcessDevice(zmq.FORWARDER, zmq.SUB, zmq.PUB)
forwarder.connect_in(forwarder_subscriber_address)
forwarder.setsockopt_in(zmq.SUBSCRIBE, "")
logger.debug("forwarder connect in: {0}".format(forwarder_subscriber_address))
forwarder.bind_out(forwarder_publisher_address)
logger.debug("forwarder bind out: {0}".format(forwarder_publisher_address))
# Set up subscriber listening to Farm-Monitor server
subscriber_address = session.query(RoutingDefiniton.route)\
.filter_by(name="subscriber_address").scalar()
subscriber_port = session.query(RoutingDefiniton.route)\
.filter_by(name="subscriber_port").scalar()
subscriber_address = "tcp://" + subscriber_address + ":" + subscriber_port
device_id = session.query(HardwareDefinition.serial_number).scalar()
subscriber_topics.append(device_id)
subscriber = Subscriber(context, subscriber_address, subscriber_topics)
subscriber.subscriber.on_recv(callback=server_subscriber_recv)
logger.debug("Subscriber listening to: {0} topics: {1}".format(subscriber_address,
subscriber_topics))
# Set up publisher to forward messages from Farm-Monitor to internal
publisher_address = session.query(RoutingDefiniton.route)\
.filter_by(name="internal_pub").scalar()
publisher = Publisher(context, publisher_address)
logger.debug("Publisher configured to: {0}".format(publisher_address))
session.close()
try:
logger.info("starting forwarder, Subscriber, and Publisher")
# Start the forwarder
forwarder.start()
IOLoop.instance().start()
except KeyboardInterrupt:
logger.info("stopping forwarder, Subscriber, and Publisher")
IOLoop.instance().stop()
subscriber.shutdown()
publisher.shutdown()
return
