Question

我使用rabbitmq作为amqp服务器（集群）和kombu + py-amqp作为amqp client.i可以发送/ recv消息正常消息队列，但我不知道如何发送/ recv消息为镜像队列，我无法用google .how发送/ recv镜像队列消息找到答案？

我的代码：

 with Connection(hostname='192.168.1.10',userid='test',password='test',virtual_host='test') as conn:
        simple_queue = conn.SimpleQueue('test')

并获得例外

  File "./test_amqp.py", line 38, in send
    simple_queue = conn.SimpleQueue('test')
  File "/usr/local/lib/python3.2/site-packages/kombu/connection.py", line 671, in SimpleQueue
    exchange_opts, **kwargs)
  File "/usr/local/lib/python3.2/site-packages/kombu/simple.py", line 122, in __init__
    consumer = messaging.Consumer(channel, queue)
  File "/usr/local/lib/python3.2/site-packages/kombu/messaging.py", line 338, in __init__
    self.revive(self.channel)
  File "/usr/local/lib/python3.2/site-packages/kombu/messaging.py", line 350, in revive
    self.declare()
  File "/usr/local/lib/python3.2/site-packages/kombu/messaging.py", line 360, in declare
    queue.declare()
  File "/usr/local/lib/python3.2/site-packages/kombu/entity.py", line 471, in declare
    self.queue_declare(nowait, passive=False)
  File "/usr/local/lib/python3.2/site-packages/kombu/entity.py", line 497, in queue_declare
    nowait=nowait)
  File "/usr/local/lib/python3.2/site-packages/amqp/channel.py", line 1240, in queue_declare
    (50, 11),  # Channel.queue_declare_ok
  File "/usr/local/lib/python3.2/site-packages/amqp/abstract_channel.py", line 70, in wait
    return self.dispatch_method(method_sig, args, content)
  File "/usr/local/lib/python3.2/site-packages/amqp/abstract_channel.py", line 88, in dispatch_method
    return amqp_method(self, args)
  File "/usr/local/lib/python3.2/site-packages/amqp/channel.py", line 222, in _close
    (class_id, method_id), ChannelError)
amqp.exceptions.PreconditionFailed: Queue.declare: (406) PRECONDITION_FAILED - inequivalent arg 'x-ha-policy'for queue 'smarton' in vhost 'smarton': received none but current is the value 'all' of type 'longstr'

Answer 1

声明队列时，所有选项必须与服务器上已存在的选项相同。在这种情况下，服务器的额外选项为'x-ha-policy': 'all'。

尝试simple_queue = conn.SimpleQueue('test', queue_opts={"x-ha-policy": "all"})

我还没有测试过这个，但我认为它会起作用。

Answer 2

也许有一些关于kombu的问题，论点：{“x-ha-policy”：“all”}应该发布到entity.Queue.queue_arguments，但是strre是没有entity.Queue的方法来设置值entity.Queue.queue_arguments，我改变了kombu.simple.SimpleQueue并获得了正确的结果：

112         if not isinstance(queue, entity.Queue):
113             exchange = entity.Exchange(name, 'direct', **exchange_opts)
114             queue = entity.Queue(name, exchange, name, **queue_opts)
115+            queue.queue_arguments={'x-ha-policy':'all'}
116         else:
117             name = queue.name
118             exchange = queue.exchange

如何在python3中使用amqp镜像队列？

2 个答案: