RabbitMQ简单生产者消费者(一对一)发送消息（看官网总结）

             1
            #
            !/usr/bin/env python
             2
            #
             -*- coding:utf-8 -*-
             3
             4
            import
             pika

             5
            
                 6 credentials = pika.PlainCredentials(‘admin‘, ‘admin123456‘)

            
                 7 connection = pika.BlockingConnection(pika.ConnectionParameters(host=‘192.168.1.13‘, credentials=credentials))

             8
            #
             建立通道
             9 channel = connection.channel()
10# 如果将消息发送到不存在的位置,RabbitMQ会删除该消息,创建消息队列叫hello11 channel.queue_declare(queue=‘hello‘)
12# 发消息了,在RabbitMQ中永远无法将消息直接发送到队列中,它始终需要进行交换(不理解这是为毛线?)13# 在这里使用空字符串标识的默认交换,准确的将指定消息放入队列中routing_key来指定14 channel.basic_publish(exchange=‘‘,
15                       routing_key=‘hello‘,
16                       body=‘Hello World!‘)
1718print(‘[x]发送hello word‘)
19# 在关闭连接之前,需要确保缓冲区已刷新消息是否已经传到消息队列中20 connection.close()

             1
            #
            !/usr/bin/env python
             2
            #
             -*- coding:utf-8 -*-
             3
             4
            import
             pika

             5
            
                 6 credentials = pika.PlainCredentials(‘admin‘, ‘admin123456‘)
 7 connection = pika.BlockingConnection(pika.ConnectionParameters(host=‘192.168.1.13‘, credentials=credentials))

             8 channel = connection.channel()
 9#  在此再次申明一次是因为当我们不确定运行哪个程序,在这种情况下,最好在两个程序中重复声明队列10 channel.queue_declare(‘hello‘)
111213def callback(ch, method, properties, body):
14"""收消息原理:向队列定义一个回调函数,无论何时接收消息,都由Pika库调用"""15print(‘[x] Received %r‘ % body)
16print(ch)
17print(method)
18print(properties)
192021# 告诉rabbitmq这个特定的回调函数应该接收来自hello队列的消息22 channel.basic_consume(queue=‘hello‘,
23                       auto_ack=True,
24                       on_message_callback=callback)
25print(‘ [*] Waiting for messages.‘)
26# 这里只要消费者一直存在通道之上，就一直死循环,源码当中有说明27 channel.start_consuming()

             1
            def
            __init__( # pylint: disable=R0913,R0914 2        self,
 3         host=_DEFAULT,  # 默认‘localhost‘ 4         port=_DEFAULT,  # 5672 5         virtual_host=_DEFAULT, # 使用rabbitmq虚拟主机,源码中还做了一次判断 6if virtual_host isnot self._DEFAULT:
 7                 self.virtual_host = virtual_host
 8         credentials=_DEFAULT, # auth凭证 9         channel_max=_DEFAULT, # 允许的最大的通道数10         frame_max=_DEFAULT,   # AMQP帧的最大字节大小 数据链路层的最小传输单位称为帧 为什么要有帧？就是为了保证数据的可靠传输把数据封装成帧了11         heartbeat=_DEFAULT,   # 默认是None 12         ssl_options=_DEFAULT, # 默认是None13         connection_attempts=_DEFAULT, #最大重试连接次数默认1次14         retry_delay=_DEFAULT, # 在几秒钟内就要等待，在之后的那一刻就不等待了 默认2.0秒15         socket_timeout=_DEFAULT, # socket连接超时 默认10s16         stack_timeout=_DEFAULT,  # (TCP/[SSL]/AMQP)协议栈超时 建议要比socket_timeout大 默认15s17         locale=_DEFAULT,         # 默认‘en_US‘18         blocked_connection_timeout=_DEFAULT, #默认None 如果不是None,连接保持阻塞(由连接触发)。阻止代理);如果超时在连接解除阻塞之前过期，连接将被断开19         client_properties=_DEFAULT,  # 默认None 或dict的客户端属性使用覆盖报告给的默认客户端属性中的字段RabbitMQ通过“Connection.StartOk”方法。20         tcp_options=_DEFAULT,        # 默认None 为套接字设置一个或没有TCP选项的dict21         **kwargs):
22"""Create a new ConnectionParameters instance. See `Parameters` for
23    default values.
2425    :param str host: Hostname or IP Address to connect to
26    :param int port: TCP port to connect to
27    :param str virtual_host: RabbitMQ virtual host to use
28    :param pika.credentials.Credentials credentials: auth credentials
29    :param int channel_max: Maximum number of channels to allow
30    :param int frame_max: The maximum byte size for an AMQP frame
31    :param int|None|callable heartbeat: Controls AMQP heartbeat timeout negotiation
32        during connection tuning. An integer value always overrides the value
33        proposed by broker. Use 0 to deactivate heartbeats and None to always
34        accept the broker‘s proposal. If a callable is given, it will be called
35        with the connection instance and the heartbeat timeout proposed by broker
36        as its arguments. The callback should return a non-negative integer that
37        will be used to override the broker‘s proposal.
38    :param `pika.SSLOptions`|None ssl_options: None for plaintext or
39        `pika.SSLOptions` instance for SSL/TLS. Defaults to None.
40    :param int connection_attempts: Maximum number of retry attempts
41    :param int|float retry_delay: Time to wait in seconds, before the next
42    :param int|float socket_timeout: Positive socket connect timeout in
43        seconds.
44    :param int|float stack_timeout: Positive full protocol stack
45        (TCP/[SSL]/AMQP) bring-up timeout in seconds. It‘s recommended to
46        set this value higher than `socket_timeout`.
47    :param str locale: Set the locale value
48    :param int|float|None blocked_connection_timeout: If not None,
49        the value is a non-negative timeout, in seconds, for the
50        connection to remain blocked (triggered by Connection.Blocked from
51        broker); if the timeout expires before connection becomes unblocked,
52        the connection will be torn down, triggering the adapter-specific
53        mechanism for informing client app about the closed connection:
54        passing `ConnectionBlockedTimeout` exception to on_close_callback
55        in asynchronous adapters or raising it in `BlockingConnection`.
56    :param client_properties: None or dict of client properties used to
57        override the fields in the default client properties reported to
58        RabbitMQ via `Connection.StartOk` method.
59    :param tcp_options: None or a dict of TCP options to set for socket
60"""

            1 D:\python\python.exe F:/abc/messagequeue/consumer_recv.py
2  [*] Waiting for messages.
3 [x] Received b‘Hello World!‘4 <BlockingChannel impl=<Channel number=1 OPEN conn=<SelectConnection OPEN transport=<pika.adapters.utils.io_services_utils._AsyncPlaintextTransport object at 0x00000171F0AF17B8> params=<ConnectionParameters host=192.168.1.13 port=5672 virtual_host=/ ssl=False>>>>
5 <Basic.Deliver([‘consumer_tag=ctag1.1830cf91aad94871b0ed054af1f71e3d‘, ‘delivery_tag=1‘, ‘exchange=‘, ‘redelivered=False‘, ‘routing_key=hello‘])>
6 <BasicProperties>