class Listener(object):
'''PyTroll listener class for reading messages for Trollduction
'''
def __init__(self, topics=None, queue=None):
'''Init Listener object
'''
self.topics = topics
self.queue = queue
self.subscriber = None
self.recv = None
self.create_subscriber()
self.running = False
def create_subscriber(self):
'''Create a subscriber instance using specified addresses and
message types.
'''
if self.subscriber is None:
if self.topics:
self.subscriber = NSSubscriber("", self.topics,
addr_listener=True)
self.recv = self.subscriber.start().recv
def add_to_queue(self, msg):
'''Add message to queue
'''
self.queue.put(msg)
def run(self):
'''Run listener
'''
self.running = True
for msg in self.recv(1):
if msg is None:
if self.running:
continue
else:
break
self.add_to_queue(msg)
def stop(self):
'''Stop subscriber and delete the instance
'''
self.running = False
time.sleep(1)
if self.subscriber is not None:
self.subscriber.stop()
self.subscriber = None
def restart(self):
'''Restart subscriber
'''
self.stop()
self.create_subscriber()
self.run()
def __init__(self, services, topics, nameserver="localhost"):
"""Init the message processor."""
Thread.__init__(self)
LOG.debug("Nameserver: {}".format(nameserver))
self.nssub = NSSubscriber(services, topics, True, nameserver=nameserver)
self.sub = None
self.loop = True
class MessageProcessor(Thread):
"""Process Messages
"""
def __init__(self, services, topics):
Thread.__init__(self)
self.nssub = NSSubscriber(services, topics, True)
self.sub = None
self.loop = True
def start(self):
self.sub = self.nssub.start()
Thread.start(self)
def process_message(self, msg):
del msg
raise NotImplementedError("process_message is not implemented!")
def run(self):
try:
for msg in self.sub.recv(2):
if not self.loop:
break
if msg is None:
continue
self.process_message(msg)
finally:
self.stop()
def stop(self):
self.nssub.stop()
self.loop = False
class MessageProcessor(Thread):
"""Process Messages
"""
def __init__(self, services, topics):
Thread.__init__(self)
self.nssub = NSSubscriber(services, topics, True)
self.sub = None
self.loop = True
def start(self):
self.sub = self.nssub.start()
Thread.start(self)
def process_message(self, msg):
del msg
raise NotImplementedError("process_message is not implemented!")
def run(self):
try:
for msg in self.sub.recv(2):
if not self.loop:
break
if msg is None:
continue
self.process_message(msg)
finally:
self.stop()
def stop(self):
self.nssub.stop()
self.loop = False
class Listener(object):
'''PyTroll listener class for reading messages for Trollduction
'''
def __init__(self, topics=None, queue=None):
'''Init Listener object
'''
self.topics = topics
self.queue = queue
self.subscriber = None
self.recv = None
self.create_subscriber()
self.running = False
def create_subscriber(self):
'''Create a subscriber instance using specified addresses and
message types.
'''
if self.subscriber is None:
if self.topics:
self.subscriber = NSSubscriber("",
self.topics,
addr_listener=True)
self.recv = self.subscriber.start().recv
def add_to_queue(self, msg):
'''Add message to queue
'''
self.queue.put(msg)
def run(self):
'''Run listener
'''
self.running = True
for msg in self.recv(1):
if msg is None:
if self.running:
continue
else:
break
self.add_to_queue(msg)
def stop(self):
'''Stop subscriber and delete the instance
'''
self.running = False
time.sleep(1)
if self.subscriber is not None:
self.subscriber.stop()
self.subscriber = None
def restart(self):
'''Restart subscriber
'''
self.stop()
self.create_subscriber()
self.run()
def create_subscriber(self):
'''Create a subscriber instance using specified addresses and
message types.
'''
if self.subscriber is None:
if self.topics:
self.subscriber = NSSubscriber("",
self.topics,
addr_listener=True)
self.recv = self.subscriber.start().recv
def create_subscriber(self):
'''Create a subscriber instance using specified addresses and
message types.
'''
if self.subscriber is None:
if self.topics:
self.subscriber = NSSubscriber("", self.topics,
addr_listener=True)
self.recv = self.subscriber.start().recv
class AbstractMessageProcessor(Thread):
"""Process Messages
"""
def __init__(self, services, topics, nameserver="localhost"):
Thread.__init__(self)
LOG.debug("Nameserver: {}".format(nameserver))
self.nssub = NSSubscriber(services,
topics,
True,
nameserver=nameserver)
self.sub = None
self.loop = True
def start(self):
self.sub = self.nssub.start()
Thread.start(self)
def process(self, msg):
"""Process the message.
"""
del msg
raise NotImplementedError("process is not implemented!")
def run(self):
"""Run the trigger.
"""
try:
for msg in self.sub.recv(2):
if not self.loop:
break
if msg is None:
continue
self.process(msg)
finally:
self.stop()
def stop(self):
"""Stop the trigger.
"""
self.nssub.stop()
self.loop = False
def __init__(self, services, topics):
Thread.__init__(self)
self.nssub = NSSubscriber(services, topics, True)
self.sub = None
self.loop = True
class Listener(object):
'''PyTroll listener class for reading messages for eg. operational
product generation.
'''
logger = logging.getLogger("Listener")
def __init__(self,
topics=None,
queue=None,
addresses=None,
nameserver="localhost",
services=""):
'''Init Listener object
'''
self.topics = topics
self.queue = queue
self.services = services
self.subscriber = None
self.recv = None
self.addresses = addresses
self.nameserver = nameserver
self.create_subscriber()
self.running = False
def create_subscriber(self):
'''Create a subscriber instance using specified addresses and
message types.
'''
if self.subscriber is None:
if self.topics:
self.subscriber = NSSubscriber(self.services,
self.topics,
addr_listener=True,
addresses=self.addresses,
nameserver=self.nameserver)
self.recv = self.subscriber.start().recv
def add_to_queue(self, msg):
'''Add message to queue
'''
self.queue.put(msg)
def run(self):
'''Run listener
'''
self.running = True
for msg in self.recv(1):
if msg is None:
if self.running:
continue
else:
break
self.logger.debug("New message received: %s", str(msg))
self.add_to_queue(msg)
def stop(self):
'''Stop subscriber and delete the instance
'''
self.running = False
time.sleep(1)
if self.subscriber is not None:
self.subscriber.stop()
self.subscriber = None
def restart(self):
'''Restart subscriber
'''
self.stop()
self.create_subscriber()
self.run()
def __init__(self, services, topics):
Thread.__init__(self)
self.nssub = NSSubscriber(services, topics, True)
self.sub = None
self.loop = True
