/
__init__.py
61 lines (42 loc) · 1.56 KB
/
__init__.py
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"""Kombu transport using the Django database as a message store."""
from __future__ import absolute_import
from Queue import Empty
from anyjson import serialize, deserialize
from django.conf import settings
from django.core import exceptions as errors
from .. import virtual
from .models import Queue
VERSION = (0, 9, 4)
__version__ = ".".join(map(str, VERSION))
POLLING_INTERVAL = getattr(settings, "DJKOMBU_POLLING_INTERVAL", 5.0)
class Channel(virtual.Channel):
def _new_queue(self, queue, **kwargs):
Queue.objects.get_or_create(name=queue)
def _put(self, queue, message, **kwargs):
Queue.objects.publish(queue, serialize(message))
def basic_consume(self, queue, *args, **kwargs):
qinfo = self.state.bindings[queue]
exchange = qinfo[0]
if self.typeof(exchange).type == "fanout":
return
super(Channel, self).basic_consume(queue, *args, **kwargs)
def _get(self, queue):
#self.refresh_connection()
m = Queue.objects.fetch(queue)
if m:
return deserialize(m)
raise Empty()
def _size(self, queue):
return Queue.objects.size(queue)
def _purge(self, queue):
return Queue.objects.purge(queue)
def refresh_connection(self):
from django import db
db.close_connection()
class DatabaseTransport(virtual.Transport):
Channel = Channel
default_port = 0
polling_interval = POLLING_INTERVAL
connection_errors = ()
channel_errors = (errors.ObjectDoesNotExist,
errors.MultipleObjectsReturned)