Python RabbitMQ实现简单的进程间通信示例

 pip install pika 

 easy_install pika

 # Author : Xuefeng import pika connection = pika.BlockingConnection(pika.Connection.Parameters( "localhost" )) # statement a channel channel = connection.channel() # create the queue, the name of queue is "hello" # durable=True can make the queue be exist, although the service have stopped before. channel.queue_declare(queue="hello", durable=True) # n RabbitMQ a message can never be sent directly to queue,it always need to go through channel.basic_publish(exchange = " ", routing_key = "hello", body = "Hello world!", properties = pika.BasicPropreties( delivery_mode=2, # make the message persistence ) ) print("[x] sent 'Hello world!'") connection.close()

 # Author : Xuefeng import pika connection = pika.BlockingConnection(pika.Connection.Parameters( "localhost" )) # statement a channel channel = connection.channel() channel.queue_declare(queue="hello", durable=True) def callback(ch, method, properties, body): ''' Handle the recieved data :param ch: The address of the channel :param method: Information about the connection :param properties: :param body: :return: ''' print("------>", ch, method, properties ) print("[x] Recieved %r" % body) # ack by ourself ch.basic_ack(delivery_tag = method.delivery_tag) # follow is for consumer to auto change with the ability channel.basic_qos(profetch_count=1) # no_ack = True represent that the message cannot be transfor to next consumer, # when the current consumer is stop by accident. channel.basic_consume(callback,  # If have recieved message, enable the callback() function to handle the message. queue = "hello", no_ack = True) print("[*] Waiting for messages. To Exit press CTRL+C") channel.start_consuming()

 # Author : Xuefeng import pika import sys # 广播模式： # 生产者发送一条消息，所有的开通链接的消费者都可以接收到消息 connection = pika.BlockingConnection(pika.Connection.Parameters( "localhost" )) # statement a channel channel = connection.channel() channel.exchange_declare(exchange="logs", type="fanout") message = ' '.join(sys.argv[1:]) or "info:Hello world!" channel.basic_publish( exchange="logs", routing_key="", body=message ) print("[x] Send %r" % message) connection.close()

 # Author : Xuefeng import pika import sys connection = pika.BlockingConnection(pika.Connection.Parameters( "localhost" )) # statement a channel channel = connection.channel() # exclusive 排他，唯一的 随机生成queue result = channel.queue_declare(exclusive=True) queue_name = result.method.queue print("Random queue name:", queue_name) channel.queue_bind(exchange="logs", queue=queue_name) def callback(ch, method, properties, body): ''' Handle the recieved data :param ch: The address of the channel :param method: Information about the connection :param properties: :param body: :return: ''' print("------>", ch, method, properties ) print("[x] Recieved %r" % body) # ack by ourself ch.basic_ack(delivery_tag = method.delivery_tag) # no_ack = True represent that the message cannot be transfor to next consumer, # when the current consumer is stop by accident. channel.basic_consume(callback,  # If have recieved message, enable the callback() function to handle the message. queue = "hello", no_ack = True) print("[*] Waiting for messages. To Exit press CTRL+C") channel.start_consuming()

 # Author : Xuefeng import pika import sys # 消息过滤模式： # 生产者发送一条消息，通过severity优先级来确定是否可以接收到消息 connection = pika.BlockingConnection(pika.Connection.Parameters( "localhost" )) # statement a channel 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 "info:Hello world!" channel.basic_publish( exchange="direct_logs", routing_key=severity, body=message ) print("[x] Send %r:%r" % (severity, message)) connection.close()

 # Author : Xuefeng import pika import sys connection = pika.BlockingConnection(pika.Connection.Parameters( "localhost" )) # statement a channel channel = connection.channel() channel.exchange_declare(exchange="direct_logs", type="direct") # exclusive 排他，唯一的 随机生成queue result = channel.queue_declare(exclusive=True) queue_name = result.method.queue print("Random queue name:", queue_name) 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) def callback(ch, method, properties, body): ''' Handle the recieved data :param ch: The address of the channel :param method: Information about the connection :param properties: :param body: :return: ''' print("------>", ch, method, properties ) print("[x] Recieved %r" % body) # ack by ourself ch.basic_ack(delivery_tag = method.delivery_tag) # no_ack = True represent that the message cannot be transfor to next consumer, # when the current consumer is stop by accident. channel.basic_consume(callback,  # If have recieved message, enable the callback() function to handle the message. queue = "hello", no_ack = True) print("[*] Waiting for messages. To Exit press CTRL+C") channel.start_consuming() 

 # Author : Xuefeng import pika import sys # 消息细致过滤模式： # 生产者发送一条消息，通过运行脚本 *.info 等确定接收消息类型进行对应接收 connection = pika.BlockingConnection(pika.Connection.Parameters( "localhost" )) # statement a channel channel = connection.channel() channel.exchange_declare(exchange="topic_logs", type="topic") binding_key = sys.argv[1] if len(sys.argv) > 1 else "info" message = ' '.join(sys.argv[2:]) or "info:Hello world!" channel.basic_publish( exchange="topic_logs", routing_key=binding_key, body=message ) print("[x] Send %r:%r" % (binding_key, message)) connection.close()

 # Author : Xuefeng import pika import sys connection = pika.BlockingConnection(pika.Connection.Parameters( "localhost" )) # statement a channel channel = connection.channel() channel.exchange_declare(exchange="topic_logs", type="topic") # exclusive 排他，唯一的 随机生成queue result = channel.queue_declare(exclusive=True) queue_name = result.method.queue print("Random queue name:", queue_name) binding_keys = sys.argv[1:] if not binding_keys: sys.stderr.write("Usage:%s [info] [warning] [error]\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) def callback(ch, method, properties, body): ''' Handle the recieved data :param ch: The address of the channel :param method: Information about the connection :param properties: :param body: :return: ''' print("------>", ch, method, properties) print("[x] Recieved %r" % body) # ack by ourself ch.basic_ack(delivery_tag=method.delivery_tag) # no_ack = True represent that the message cannot be transfor to next consumer, # when the current consumer is stop by accident. channel.basic_consume(callback, # If have recieved message, enable the callback() function to handle the message. queue="hello", no_ack=True) print("[*] Waiting for messages. To Exit press CTRL+C") channel.start_consuming()

 # Author : Xuefeng import pika import time import uuid class FibonacciRpcClient(object): def __init__(self): self.connection = pika.BlockingConnection(pika.Connection.Parameters( "localhost")) self.channel = self.connection.channel() result = self.channel.queue_declare(exclusive=True) self.callback_queue = result.method.queue  # 随机的生成一个接收命令执行结果的队列 self.channel.basic_consume(self.on_response, # 只要收到消息就调用 no_ack=True, queue=self.callback_queue) def on_response(self, ch, method, props, body): if self.corr_id == props.correlation_id: self.response = body def call(self,n): self.response = None self.corr_id = str(uuid.uuid4()) self.channel.basic_publish( exchange="", routing_key="rpc_queue", properties=pika.BasicPropreties( rely_to=self.callback_queue, correlation_id=self.corr_id   # 通过随机生成的ID来验证指令执行结果与指令的匹配性 ), body=str(n) ) while self.response is None: self.connection.process_data_events() # 非阻塞版的start_consume，有没有消息都继续 print("no message...") time.sleep(0.5) return int(self.response) fibonacci_rcp = FibonacciRpcClient() print("[x] Requesting fib(30)") response = fibonacci_rcp.call(30) print("[x] Rec %r" % response)

 # Author : Xuefeng import pika import sys connection = pika.BlockingConnection(pika.Connection.Parameters( "localhost" )) # statement a channel channel = connection.channel() channel.queue_declare(queue="rpc_queue") def fib(n): if n == 0: return 0 elif n == 1: return 1 else: return fib(n-1)+fib(n-2) def on_request(ch, method, props, body): n = int(body) print("[.] fib(%s)" % n) response = fib(n) ch.basic_publish( exchange="", routing_key=props.rely_to, properties=pika.BasicPropreties(correlation_id=\ props.correlation), body = str(body) ) ch.basic_ack(delivery_tag=method.delivery_tag) channel.basic_qos(prefetch_count=1) channel.basic_consume(on_request, queue="rpc_queue") print("[x] Awaiting RPC requests") channel.start_consumeing() channel.exchange_declare(exchange="direct_logs", type="direct") # exclusive 排他，唯一的 随机生成queue result = channel.queue_declare(exclusive=True) queue_name = result.method.queue print("Random queue name:", queue_name) severities = sys.argv[1:]