Python rabbitmq

一、RabbitMQ安装

安装配置epel源

   $ rpm -ivh http://dl.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm

 

安装erlang

   $ yum -y install erlang

 

安装RabbitMQ

   $ yum -y install rabbitmq-server

二、启动rabbitmq

/etc/init.d/rabbitmq-server start

[root@rabbitmq init.d]# ./rabbitmq-server start
Starting rabbitmq-server: SUCCESS
rabbitmq-server.

1.生产者和消费者模型（三种模型：a,acknowledgment 消息不丢失;b,durable消息不丢失;c,消息获取顺序）

生产者：

__author__ = 'alex'
#!/usr/bin/env python
import pika


connection = pika.BlockingConnection(pika.ConnectionParameters(
        host='192.168.2.109'))
channel = connection.channel()

channel.queue_declare(queue='hello1',durable=True)

channel.basic_publish(exchange='',
                      routing_key='hello',
                      body='Hello World!',
                      properties=pika.BasicProperties(
                          delivery_mode=2, # make message persistent
                      ))
print(" [x] Sent 'Hello World!'")
connection.close()

消费者：

__author__ = 'alex'
import pika
import time

connection = pika.BlockingConnection(pika.ConnectionParameters(
        host='192.168.2.109'))

channel = connection.channel()

channel.queue_declare(queue='hello1',durable=True)

def callback(ch, method, properties, body):
    print(" [x] Received %r" % body,type(body))
    time.sleep(2)
    print ("OK")
    ch.basic_ack(delivery_tag = method.delivery_tag)

channel.basic_consume(callback,
                      queue='hello',
                      no_ack=False)

print(' [*] Waiting for messages. To exit press CTRL+C')
channel.start_consuming()

2.发布者和订阅者模型

a. exchange type = fanout

发布者：

__author__ = 'alex'
import pika
import sys

connection = pika.BlockingConnection(pika.ConnectionParameters(
        host='192.168.2.109'))
channel = connection.channel()

channel.exchange_declare(exchange='logs',
                         type='fanout')

message = ' '.join(sys.argv[0]) or "info: Hello World!"
channel.basic_publish(exchange='logs',
                      routing_key='',
                      body=message)
print(" [x] Sent %r" % message)
connection.close()

订阅者：

#!/usr/bin/env python
import pika

connection = pika.BlockingConnection(pika.ConnectionParameters(
        host='192.168.2.109'))
channel = connection.channel()

channel.exchange_declare(exchange='logs',
                         type='fanout')

result = channel.queue_declare(exclusive=True)
queue_name = result.method.queue
print (queue_name)

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(callback,
                      queue=queue_name,
                      no_ack=True)

channel.start_consuming()

b.exchange type = direct

发布者：（执行发布的时候带参数，确定发布参数的级别）

__author__ = 'alex'
#!/usr/bin/env python
import pika
import sys

connection = pika.BlockingConnection(pika.ConnectionParameters(
        host='192.168.2.109'))
channel = connection.channel()

channel.exchange_declare(exchange='direct_logs',
                         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()

订阅者：（可以同时执行多个订阅者，定义每个订阅者的接收消息的级别，只接收相同级别的消息）

__author__ = 'alex'
#!/usr/bin/env python
import pika
import sys

connection = pika.BlockingConnection(pika.ConnectionParameters(
        host='192.168.2.109'))
channel = connection.channel()

channel.exchange_declare(exchange='direct_logs',
                         type='direct')

result = channel.queue_declare(exclusive=True)
queue_name = result.method.queue
print (queue_name)

severities = sys.argv[1:]
if not severities:
    sys.stderr.write("Usage: %s [info] [warning] [error]
" % 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(callback,
                      queue=queue_name,
                      no_ack=True)

channel.start_consuming()

c. exchange type = topic

# 表示可以匹配 0 个 或 多个 单词
* 表示只能匹配 一个 单词

生产者：

__author__ = 'alex'
#!/usr/bin/env python
import pika
import sys

connection = pika.BlockingConnection(pika.ConnectionParameters(
        host='192.168.2.109'))
channel = connection.channel()

channel.exchange_declare(exchange='topic_logs',
                         type='topic')

routing_key = sys.argv[1] if len(sys.argv) > 1 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()

消费者：

__author__ = 'alex'
#!/usr/bin/env python
import pika
import sys

connection = pika.BlockingConnection(pika.ConnectionParameters(
        host='192.168.2.109'))
channel = connection.channel()

channel.exchange_declare(exchange='topic_logs',
                         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]...
" % 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(callback,
                      queue=queue_name,
                      no_ack=True)

channel.start_consuming()

在执行消费者的时候，带参数可以匹配模糊的符号,*或者#，在生产者执行的时候，会自动匹配消费者的规则，如果匹配规则，那么消费者可以接收到相关的信息。