Ubuntu 16.04.1
Python 3.5.2
安装RabbitMQServer更新软件源
$ apt-get update
安装 rabbitmq-server
$ apt-get install -y rabbitmq-server
安装 pika
$ pip3 install pika
管理RabbitMQServer用来实现 python 与 rabbitmq 的对接。
启动
$ service rabbitmq-server start
关闭
$ service rabbitmq-server stop
查看状态
$ service rabbitmq-server status
调整系统限制
$ cat /etc/default/rabbitmq-server # This file is sourced by /etc/init.d/rabbitmq-server. Its primary # reason for existing is to allow adjustment of system limits for the # rabbitmq-server process. # # Maximum number of open file handles. This will need to be increased # to handle many simultaneous connections. Refer to the system # documentation for ulimit (in man bash) for more information. # ulimit -n 1024
编辑 /etc/default/rabbitmq-server 中的 ulimit 参数，默认1024。
日志
$ ls /var/log/rabbitmq rabbit@VM-2-14-ubuntu.log startup_err rabbit@VM-2-14-ubuntu-sasl.log startup_log工作队列模式 61e677960a9dc_61e677960a9d6.png
创建 new_task.py，代码如下
#!/usr/bin/env python3
import pika
import sys
connection = pika.BlockingConnection(pika.ConnectionParameters(
host='localhost'))
channel = connection.channel()
# 持久化一个队列，名为 task_queue
channel.queue_declare(queue='task_queue', durable=True)
message = ' '.join(sys.argv[1:]) or "No new task"
channel.basic_publish(exchange='',
routing_key='task_queue',
body=message,
properties=pika.BasicProperties(
# 消息持久化
delivery_mode = 2,
))
print(" [x] Sent %r" % message)
# 关闭连接
connection.close()
创建 worker.py，代码如下
#!/usr/bin/env python3
import pika
import time
connection = pika.BlockingConnection(pika.ConnectionParameters(
host='localhost'))
channel = connection.channel()
channel.queue_declare(queue='task_queue', durable=True)
print(" [*] Waiting for messages. To exit press CTRL+C")
def callback(ch, method, properties, body):
print(" [x] Received %r" % body)
time.sleep(body.count(b'.') )
print(" [x] Done")
ch.basic_ack(delivery_tag = method.delivery_tag)
channel.basic_qos(prefetch_count=1)
channel.basic_consume(queue='task_queue',
on_message_callback=callback)
channel.start_consuming()
执行
# 终端1，发布新任务 $ python3 new_task.py eating [x] Sent 'eating' $ python3 new_task.py drinking [x] Sent 'drinking' $ python3 new_task.py playing [x] Sent 'playing' # 终端2，添加工作者 $ python3 worker.py [*] Waiting for messages. To exit press CTRL+C [x] Received b'eating' [x] Done [x] Received b'drinking' [x] Done [x] Received b'playing' [x] Done扇形交换机 61e686ab09d66_61e686ab09d5b.png
创建 send_log.py，代码如下
#!/usr/bin/env python3
import pika
import sys
connection = pika.BlockingConnection(
pika.ConnectionParameters(host='localhost'))
channel = connection.channel()
channel.exchange_declare(exchange='logs', exchange_type='fanout')
message = ' '.join(sys.argv[1:]) or "info: Hello World!"
channel.basic_publish(exchange='logs', routing_key='', body=message)
print(" [x] Sent %r" % message)
connection.close()
创建 receive_logs.py，代码如下
#!/usr/bin/env python3
import pika
connection = pika.BlockingConnection(
pika.ConnectionParameters(host='localhost'))
channel = connection.channel()
channel.exchange_declare(exchange='logs', exchange_type='fanout')
result = channel.queue_declare(queue='', exclusive=True)
queue_name = result.method.queue
channel.queue_bind(exchange='logs', queue=queue_name)
print(' [*] Waiting for logs. To exit press CTRL+C')
def callback(ch, method, properties, body):
print(" [x] %r" % body)
channel.basic_consume(
queue=queue_name, on_message_callback=callback, auto_ack=True)
channel.start_consuming()
执行
# 终端1，接收日志 $ python3 receive_logs.py [*] Waiting for logs. To exit press CTRL+C [x] b'eating' # 终端2，接收日志 $ python3 receive_logs.py [*] Waiting for logs. To exit press CTRL+C [x] b'eating' # 终端3，发送日志 $ python3 new_task.py eating [x] Sent 'eating'直连交换机 61e68ad22bf39_61e68ad22bf33.png
创建 send_log_direct.py，代码如下
#!/usr/bin/env python3
import pika
import sys
connection = pika.BlockingConnection(
pika.ConnectionParameters(host='localhost'))
channel = connection.channel()
channel.exchange_declare(exchange='direct_logs', exchange_type='direct')
severity = sys.argv[1] if len(sys.argv) > 1 else 'info'
message = ' '.join(sys.argv[2:]) or 'Hello World!'
channel.basic_publish(
exchange='direct_logs', routing_key=severity, body=message)
print(" [x] Sent %r:%r" % (severity, message))
connection.close()
创建 receive_logs_direct.py，代码如下
#!/usr/bin/env python3
import pika
import sys
connection = pika.BlockingConnection(
pika.ConnectionParameters(host='localhost'))
channel = connection.channel()
channel.exchange_declare(exchange='direct_logs', exchange_type='direct')
result = channel.queue_declare(queue='', exclusive=True)
queue_name = result.method.queue
severities = sys.argv[1:]
if not severities:
sys.stderr.write("Usage: %s [info] [warning] [error]n" % sys.argv[0])
sys.exit(1)
for severity in severities:
channel.queue_bind(
exchange='direct_logs', queue=queue_name, routing_key=severity)
print(' [*] Waiting for logs. To exit press CTRL+C')
def callback(ch, method, properties, body):
print(" [x] %r:%r" % (method.routing_key, body))
channel.basic_consume(
queue=queue_name, on_message_callback=callback, auto_ack=True)
channel.start_consuming()
执行
# 终端1，接收日志 $ python3 receive_logs_direct.py error [*] Waiting for logs. To exit press CTRL+C [x] 'error':b'playing # 终端2，接收日志 $ python3 receive_logs_direct.py info [*] Waiting for logs. To exit press CTRL+C [x] 'info':b'watching' # 终端3，发送日志 $ python3 send_log_direct.py info watching [x] Sent 'info':'watching' $ python3 send_log_direct.py error playing [x] Sent 'error':'playing'主题交换机 61e690149f79f_61e690149f79a.png
创建 send_log_topic.py，代码如下
#!/usr/bin/env python3
import pika
import sys
connection = pika.BlockingConnection(
pika.ConnectionParameters(host='localhost'))
channel = connection.channel()
channel.exchange_declare(exchange='topic_logs', exchange_type='topic')
routing_key = sys.argv[1] if len(sys.argv) > 2 else 'anonymous.info'
message = ' '.join(sys.argv[2:]) or 'Hello World!'
channel.basic_publish(
exchange='topic_logs', routing_key=routing_key, body=message)
print(" [x] Sent %r:%r" % (routing_key, message))
connection.close()
创建 receive_logs_topic.py，代码如下
#!/usr/bin/env python3
import pika
import sys
connection = pika.BlockingConnection(
pika.ConnectionParameters(host='localhost'))
channel = connection.channel()
channel.exchange_declare(exchange='topic_logs', exchange_type='topic')
result = channel.queue_declare('', exclusive=True)
queue_name = result.method.queue
binding_keys = sys.argv[1:]
if not binding_keys:
sys.stderr.write("Usage: %s [binding_key]...n" % sys.argv[0])
sys.exit(1)
for binding_key in binding_keys:
channel.queue_bind(
exchange='topic_logs', queue=queue_name, routing_key=binding_key)
print(' [*] Waiting for logs. To exit press CTRL+C')
def callback(ch, method, properties, body):
print(" [x] %r:%r" % (method.routing_key, body))
channel.basic_consume(
queue=queue_name, on_message_callback=callback, auto_ack=True)
channel.start_consuming()
执行
# 终端1，发送日志 $ python3 send_log_topic.py "quick.orange.rabbit" [x] Sent 'quick.orange.rabbit':"quick.orange.rabbit' $ python3 send_log_topic.py "lazy.pink.rabbit" [x] Sent 'quick.orange.rabbit':'lazy.pink.rabbit' # 终端2，接收日志 $ python3 receive_logs_topic.py "*.orange.*" [*] Waiting for logs. To exit press CTRL+C [x] 'quick.orange.rabbit':b'lazy.pink.rabbit' # 终端3，接收日志 $ python3 receive_logs_topic.py "*.*.rabbit" [*] Waiting for logs. To exit press CTRL+C [x] 'quick.orange.rabbit':b'lazy.pink.rabbit'
