python+rabbitMQ實現生產者和消費者模式
阿新 • • 發佈:2020-08-12
(一)安裝一個訊息中介軟體,如:rabbitMQ
(二)生產者
sendmq.py
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import pika
import sys
import time
# 遠端rabbitmq服務的配置資訊
username = 'admin' # 指定遠端rabbitmq的使用者名稱密碼
pwd = 'admin'
ip_addr = '10.1.7.7'
port_num = 5672
# 訊息佇列服務的連線和佇列的建立 credentials = pika.PlainCredentials(username, pwd)
connection = pika.BlockingConnection(pika.ConnectionParameters(ip_addr, port_num, '/' , credentials))
channel = connection.channel()
# 建立一個名為balance的佇列,對queue進行durable持久化設為True(持久化第一步)
channel.queue_declare(queue = 'balance' , durable = True )
message_str = 'Hello World!'
for i in range ( 100000000 ):
# n RabbitMQ a message can never be sent directly to the queue, it always needs to go through an exchange.
channel.basic_publish(
exchange = '',
routing_key = 'balance' , # 寫明將訊息傳送給佇列balance
body = message_str, # 要傳送的訊息
properties = pika.BasicProperties(delivery_mode = 2 , ) # 設定訊息持久化(持久化第二步),將要傳送的訊息的屬性標記為2,表示該訊息要持久化
) # 向訊息佇列傳送一條訊息
print ( " [%s] Sent 'Hello World!'" % i)
# time.sleep(0.2)
connection.close() # 關閉訊息佇列服務的連線
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執行sendmq.py檔案,可以從以下方法檢視佇列中的訊息數量。
一是,rabbitmq的管理介面,如下圖所示:
二是,從伺服器端命令檢視
?1 |
rabbitmqctl list_queues
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(三)消費者
receivemq.py
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import pika
import sys
import time
# 遠端rabbitmq服務的配置資訊
username = 'admin' # 指定遠端rabbitmq的使用者名稱密碼
pwd = 'admin'
ip_addr = '10.1.7.7'
port_num = 5672
credentials = pika.PlainCredentials(username, pwd)
connection = pika.BlockingConnection(pika.ConnectionParameters(ip_addr, port_num, '/' , credentials))
channel = connection.channel()
# 消費成功的回撥函式
def callback(ch, method, properties, body):
print ( " [%s] Received %r" % (time.time(), body))
# time.sleep(0.2)
# 開始依次消費balance佇列中的訊息
channel.basic_consume(queue = 'balance' , on_message_callback = callback, auto_ack = True )
print ( ' [*] Waiting for messages. To exit press CTRL+C' )
channel.start_consuming() # 啟動消費
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執行receivemq.py檔案,可以從以下方法檢視佇列中的訊息數量。
或者
rabbitmqctl list_queues
延伸:
systemctl status rabbitmq-server.service # 狀態
systemctl restart rabbitmq-server.service # 重啟