使用 Python 绑定在 Qpid Proton 中设置自定义消息属性

Question

我试图发送一个消息使用Python Qpid质子结合自定义属性，但是我无法找到这样做的正确方法？

  message = Message()
  message.body = u"hello body"
  data = Data()
  data.put_map()
  data.enter()
  data.put_string("key")
  data.put_string("value")
  data.exit()
  message.properties = data
  messenger.put(message)
  messenger.send()

结果是...

Traceback (most recent call last):
  File "./candy_ingest.py", line 37, in <module>
    messenger.put(message)
  File "/usr/lib/python2.7/dist-packages/proton.py", line 473, in put
    message._pre_encode()
  File "/usr/lib/python2.7/dist-packages/proton.py", line 781, in _pre_encode
    props.put_object(self.properties)
  File "/usr/lib/python2.7/dist-packages/proton.py", line 2036, in put_object
    putter = self.put_mappings[obj.__class__]
KeyError: <class proton.Data at 0x2320420>

欢迎任何帮助！

TIA，托马斯。

Answer 1

这是我用于将 RaspBerryPi 连接到 Windows Azure 服务总线的代码

import sys
from proton import *

#This code is for initiating the AMQP messenger
amqpmng = Messenger()
amqpmng._set_timeout(2000L) #Set timeout for sending and receiving at 2000 ms
address = "amqp://owner:<longpassword>@<namespace>.servicebus.windows.net/<queuename>" 

#This code is for creating messages
msg = Message()
msg.subject = "This is a testmessage"
msg.body = "Lorem ipsum dolor sit amet, consectetuer adipiscing elit."

#This code is for sending messages
try:
    msg.address = address
    amqpmng.put(msg)
    amqpmng.send()
except:
    e = sys.exc_info()[0]
    print e, "Waited for 2s to send messages, nothing send, connection timed out"

amqpmng.stop();

#This code is for receiving messages
amqpmng.subscribe(address)
amqpmng.start()
try:
    amqpmng.recv(1) #receive exactly 1 message (you can enter any value)
    msg = Message()
    while amqpmng.incoming > 0:
        amqpmng.get(msg)
        print(msg.body)
except:
    e = sys.exc_info()[0]
    print e, "Waited for 2s to receive messages, nothing received, connection timed out"

amqpmng.stop()

而且消息类只有两个以数据为参数的方法。

message.decode(data)
message.load(data)

我认为你应该使用 message.load(data)。

另外，我从 API 参考中了解到，message.properties 正在使用 python 类字典来映射其类属性。

让我知道是否有帮助！