python 使用ActiveMQ

1.首先安装stomp模块

https://pypi.org/project/stomp.py/#files

pip install stomp.py

2.查看官方文档

http://jasonrbriggs.github.io/stomp.py/quickstart.html

import time
import sys

import stomp

class MyListener(stomp.ConnectionListener):
    def on_error(self, frame):
        print('received an error "%s"' % frame.body)

    def on_message(self, frame):
        print('received a message "%s"' % frame.body)

conn = stomp.Connection()
conn.set_listener('', MyListener())
conn.connect('admin', 'password', wait=True)
conn.subscribe(destination='/queue/test', id=1, ack='auto')
conn.send(body=' '.join(sys.argv[1:]), destination='/queue/test')
time.sleep(2)
conn.disconnect()

3.本地安装ActiveMQ测试

安装参考：https://blog.youkuaiyun.com/Mr_haixin/article/details/80418204

其中报错参考：https://blog.youkuaiyun.com/gino725/article/details/78403303

这个错误，因为我本机账号不能修改所以使用上面的解决办法

实际上是用户连接有下划线，这里也贴到这：https://blog.youkuaiyun.com/qq_39056805/article/details/80749337

4.测试

5.区分queue和topic接收的区别试验

区别：https://blog.youkuaiyun.com/qq_21033663/article/details/52458305

• Queue

 连续发送多个消息

 

 启动接收

import time
import sys

import stomp


class MyListener(stomp.ConnectionListener):
    def on_error(self, frame):
        print('received an error "%s"' % frame.body)

    def on_message(self, frame):
        print('received a message "%s"' % frame.body)


conn = stomp.Connection()
conn.set_listener('gaofan', MyListener())
conn.connect('admin', 'password', wait=True)
conn.subscribe(destination='/queue/test', id=1, ack='auto')

time.sleep(20)
conn.disconnect()

结果收到了我刚刚发送的两条消息

在看状态，两条消息已接收

 

 在程序运行期间发送消息，也能接收到。

•  Topic

先启动程序

import time
import sys

import stomp


class MyListener(stomp.ConnectionListener):
    def on_error(self, frame):
        print('received an error "%s"' % frame.body)

    def on_message(self, frame):
        print('received a message "%s"' % frame.body)


conn = stomp.Connection()
conn.set_listener('gaofan', MyListener())
conn.connect('admin', 'password', wait=True)
conn.subscribe(destination='/topic/test', id=1, ack='auto')
time.sleep(20)
conn.disconnect()

在程序运行期间发送消息

 

 结果

 总结：

队列形式发送消息会保存，一旦消费者连接就能接收到

主题形式必须是连接期间才能收到发送的消息，不能保存