mirror of https://github.com/morpheus65535/bazarr
123 lines
5.2 KiB
Python
123 lines
5.2 KiB
Python
import pickle
|
|
import uuid
|
|
|
|
try:
|
|
import kombu
|
|
except ImportError:
|
|
kombu = None
|
|
|
|
from .pubsub_manager import PubSubManager
|
|
|
|
|
|
class KombuManager(PubSubManager): # pragma: no cover
|
|
"""Client manager that uses kombu for inter-process messaging.
|
|
|
|
This class implements a client manager backend for event sharing across
|
|
multiple processes, using RabbitMQ, Redis or any other messaging mechanism
|
|
supported by `kombu <http://kombu.readthedocs.org/en/latest/>`_.
|
|
|
|
To use a kombu backend, initialize the :class:`Server` instance as
|
|
follows::
|
|
|
|
url = 'amqp://user:password@hostname:port//'
|
|
server = socketio.Server(client_manager=socketio.KombuManager(url))
|
|
|
|
:param url: The connection URL for the backend messaging queue. Example
|
|
connection URLs are ``'amqp://guest:guest@localhost:5672//'``
|
|
and ``'redis://localhost:6379/'`` for RabbitMQ and Redis
|
|
respectively. Consult the `kombu documentation
|
|
<http://kombu.readthedocs.org/en/latest/userguide\
|
|
/connections.html#urls>`_ for more on how to construct
|
|
connection URLs.
|
|
:param channel: The channel name on which the server sends and receives
|
|
notifications. Must be the same in all the servers.
|
|
:param write_only: If set to ``True``, only initialize to emit events. The
|
|
default of ``False`` initializes the class for emitting
|
|
and receiving.
|
|
:param connection_options: additional keyword arguments to be passed to
|
|
``kombu.Connection()``.
|
|
:param exchange_options: additional keyword arguments to be passed to
|
|
``kombu.Exchange()``.
|
|
:param queue_options: additional keyword arguments to be passed to
|
|
``kombu.Queue()``.
|
|
:param producer_options: additional keyword arguments to be passed to
|
|
``kombu.Producer()``.
|
|
"""
|
|
name = 'kombu'
|
|
|
|
def __init__(self, url='amqp://guest:guest@localhost:5672//',
|
|
channel='socketio', write_only=False, logger=None,
|
|
connection_options=None, exchange_options=None,
|
|
queue_options=None, producer_options=None):
|
|
if kombu is None:
|
|
raise RuntimeError('Kombu package is not installed '
|
|
'(Run "pip install kombu" in your '
|
|
'virtualenv).')
|
|
super(KombuManager, self).__init__(channel=channel,
|
|
write_only=write_only,
|
|
logger=logger)
|
|
self.url = url
|
|
self.connection_options = connection_options or {}
|
|
self.exchange_options = exchange_options or {}
|
|
self.queue_options = queue_options or {}
|
|
self.producer_options = producer_options or {}
|
|
self.producer = self._producer()
|
|
|
|
def initialize(self):
|
|
super(KombuManager, self).initialize()
|
|
|
|
monkey_patched = True
|
|
if self.server.async_mode == 'eventlet':
|
|
from eventlet.patcher import is_monkey_patched
|
|
monkey_patched = is_monkey_patched('socket')
|
|
elif 'gevent' in self.server.async_mode:
|
|
from gevent.monkey import is_module_patched
|
|
monkey_patched = is_module_patched('socket')
|
|
if not monkey_patched:
|
|
raise RuntimeError(
|
|
'Kombu requires a monkey patched socket library to work '
|
|
'with ' + self.server.async_mode)
|
|
|
|
def _connection(self):
|
|
return kombu.Connection(self.url, **self.connection_options)
|
|
|
|
def _exchange(self):
|
|
options = {'type': 'fanout', 'durable': False}
|
|
options.update(self.exchange_options)
|
|
return kombu.Exchange(self.channel, **options)
|
|
|
|
def _queue(self):
|
|
queue_name = 'flask-socketio.' + str(uuid.uuid4())
|
|
options = {'durable': False, 'queue_arguments': {'x-expires': 300000}}
|
|
options.update(self.queue_options)
|
|
return kombu.Queue(queue_name, self._exchange(), **options)
|
|
|
|
def _producer(self):
|
|
return self._connection().Producer(exchange=self._exchange(),
|
|
**self.producer_options)
|
|
|
|
def __error_callback(self, exception, interval):
|
|
self._get_logger().exception('Sleeping {}s'.format(interval))
|
|
|
|
def _publish(self, data):
|
|
connection = self._connection()
|
|
publish = connection.ensure(self.producer, self.producer.publish,
|
|
errback=self.__error_callback)
|
|
publish(pickle.dumps(data))
|
|
|
|
def _listen(self):
|
|
reader_queue = self._queue()
|
|
|
|
while True:
|
|
connection = self._connection().ensure_connection(
|
|
errback=self.__error_callback)
|
|
try:
|
|
with connection.SimpleQueue(reader_queue) as queue:
|
|
while True:
|
|
message = queue.get(block=True)
|
|
message.ack()
|
|
yield message.payload
|
|
except connection.connection_errors:
|
|
self._get_logger().exception("Connection error "
|
|
"while reading from queue")
|