python 操作訊息佇列

其中p指producer，即生產者；c指consumer，即消費者。中間的紅色表示訊息佇列，例項中表現為hello佇列。

往佇列裡插入資料前，檢視訊息佇列

$sudo

rabbitmqctl  list_queues
listing queues ...
celeryev.db53a5e0-1e6a-4f06-a9f7-2c104c4612fb    0
...done.

#

coding=utf8
import
pika
connection = pika.blockingconnection(pika.connectionparameters('
localhost'))
channel =connection.channel()
#宣告佇列，如果訊息傳送到不存在的佇列，rabbitmq會自動清除這些訊息
channel.queue_declare(queue='
hello')
for i in range(10):
#exchange表示交換器，可以精確的制定訊息應發到哪個佇列，route_key設定佇列的名稱，body表示傳送的內容
channel.basic_publish(exchange='', routing_key='
hello
', body='
hello world!
' +str(i))
print
"[%d] sent 'hello world!'
" %i
#關閉連線
connection.close()

$python  in_queue.py

[0] sent 
'hello world!
'[1] sent '
hello world!
'[2] sent '
hello world!
'[3] sent '
hello world!
'[4] sent '
hello world!
'[5] sent '
hello world!
'[6] sent '
hello world!
'[7] sent '
hello world!
'[8] sent '
hello world!
'[9] sent '
hello world!
'

$sudo rabbitmqctl  list_queues

listing queues ...
hello    10celeryev.db53a5e0-1e6a-4f06-a9f7-2c104c4612fb    0
...done.

#out_queue.py

#

coding=utf8
import
pika
connection = pika.blockingconnection(pika.connectionparameters('
localhost'))
channel =connection.channel()
channel.queue_declare(queue='
hello')
defcallback(ch, method, properties, body):
print
"[x] received %r
" %(body,)
channel.basic_consume(callback, queue='
hello
', no_ack=true)
print
'[*] waiting for messages. to exit press ctrl+c
'channel.start_consuming()

$python out_queue.py 

[*] waiting for messages. to exit press ctrl+c
[x] received 
'hello world!0
'[x] received 
'hello world!1
'[x] received 
'hello world!2
'[x] received 
'hello world!3
'[x] received 
'hello world!4
'[x] received 
'hello world!5
'[x] received 
'hello world!6
'[x] received 
'hello world!7
'[x] received 
'hello world!8
'[x] received 
'hello world!9
'

$sudo rabbitmqctl  list_queues

listing queues ...
hello    0
celeryev.db53a5e0-1e6a-4f06-a9f7-2c104c4612fb    0
...done.

未完待續

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