My first rabbitMQ program - hello_world

First make sure that rabbitMQ has been installed, that is, running rabbitMQ-server in the installation directory can be successful

Then do the following two steps:

First create a hello_world_send.py

1.   
2. import  them  
3. import pika  
4.   
5. conn = None  
6.   
7. try:  
8.     # get connection  
9.     conn = pika.BlockingConnection(pika.ConnectionParameters('localhost'))  
10.     # get channel  
11.     channel = conn.channel()  
12.   
13.     # Before sending the queue, you need to determine whether the queue exists. If it does not exist, RabbitMQ will discard it. Create the queue first.  
14.     channel.queue_declare('hello')  
15.   
16.     # Sending messages in RabbitMQ is not a direct queue, but an exchange. I won't do much research here, and the following series will gradually deepen  
17.     ret = channel.basic_publish(exchange='',  
18.                                 routing_key='hello',  
19.                                 body="Hello, World!")  
20.     print" [x] Sent 'Hello World!'"   
21.     print  right  
22. except Exception, e:  
23.     raise e  
24. finally:  
25.     if conn:  
26.         conn.close()
    

Then create a hello_world_recv.py

1.  
   
2. import  them  
3. import pika  
4.   
5. conn = None  
6.   
7.   
8. def callback(ch, method, properties, body):  
9.     """ 
10.         out body 
11.     """  
12.     print" [x] Recived ch {0}".format(ch)   
13.   
14.     print" [x] Recived method {0}".format(method)   
15.   
16.     print" [x] Recived properties {0}".format(properties)   
17.   
18.     print" [x] Recived %r" % (body, )   
19.   
20. try:  
21.     # get connection  
22.     conn = pika.BlockingConnection(pika.ConnectionParameters(  
23.         'localhost')  
24.     )  
25.   
26.     # get channel  
27.     channel = conn.channel()  
28.   
29.     # declare queue, repeated declaration will not report an error, but if there is no queue, direct access will report an error  
30.     channel.queue_declare('hello')  
31.   
32.     # get message  
33.     channel.basic_consume(callback, queue='hello', no_ack=True)  
34.   
35.     print' [*] Waiting for messages. To exit press CTRL+C'   
36.     channel.start_consuming()  
37. except Exception, e:  
38.     raise e  
39. finally:  
40.     if conn:  
41.         conn.close() 
    

Now:

1: Run rabbitmq-server under sbin in the rabbitMQ installation directory

2: Run in the python file directory: python hello_world_recv.py

3: Run in the python file directory: python hello_world_send.py

After success you can see

1. $ python send_helloworld.py   
2.  [x] Sent 'Hello World!'  
3. True 
   

1. $ python recv_helloworld.py   
2.  [*] Waiting for messages. To exit press CTRL+C  
3.  [x] Recived ch <pika.adapters.blocking_connection.BlockingChannel object at 0x7f61ecc6fa90>  
4.  [x] Recived method <Basic.Deliver(['consumer_tag=ctag1.6c2c709930904468b40d0e1a758f7aca', 'delivery_tag=1', 'exchange=', 'redelivered=False', 'routing_key=hello'])>  
5.  [x] Recived properties <BasicProperties>  
6.  [x] Recived 'Hello, World!' 
   

After the running program starts, it has been waiting to get the message, which can be aborted by Ctrl-C. Hello World is basically over, you basically know the basic usage of RabbitMQ, and the usage scenarios of RabbitMQ will be further analyzed in the future.

A reference URL is given below:

https://blog.csdn.net/fgf00/article/details/52872730