〖Demo〗-- 基于RabbitMQ rpc实现的主机管理

【基于RabbitMQ rpc实现的主机管理】

要求：

文件分布：

流程图：

import pika
import os
import socket

class Server(object):
    def __init__(self, queuename):
        self.queuename = queuename
        self.connection = pika.BlockingConnection(pika.ConnectionParameters(host = 'localhost'))
        self.channel = self.connection.channel()  #声明一个管道
        self.channel.queue_declare(queue=self.queuename)
    def handle(self,command):
        message = os.popen(command.decode()).read()
        if not message:
            message = 'wrong command'
        return message
    def on_requet(self, ch, method,props,body):
        response = self.handle(body)
        print(response)
        ch.basic_publish(exchange='',
                      routing_key=props.reply_to, #拿到客户端随机生成的queue
                      properties = pika.BasicProperties(correlation_id = props.correlation_id),
                      body = str(response))
        ch.basic_ack(delivery_tag = method.delivery_tag)#确保任务完成

    def start(self):
        self.channel.basic_consume(self.on_requet, queue=self.queuename) #收到消息就调用on_requet
        print(" [x] Awaiting RPC requests")
        self.channel.start_consuming()





if __name__ == "__main__":
    hostname = socket.gethostname()
    ip = socket.gethostbyname(hostname) # 获取本地ip地址作为queue name
    print(ip)
    queue_name = ip
    server = Server(queue_name)
    server.start()

import pika
import uuid
import random
import threading


class Client(object):
    def __init__(self):
        self.connection = pika.BlockingConnection(pika.ConnectionParameters(host = 'localhost'))
        self.channel = self.connection.channel()

    def on_response(self, ch, method, props, body):
        if self.callback_id == props.correlation_id:
            self.response = body
        ch.basic_ack(delivery_tag=method.delivery_tag)

    def get_response(self, callback_queue, corr_id):
        self.response = None
        self.callback_id = corr_id
        self.channel.basic_consume(self.on_response, queue=callback_queue)
        while self.response is None:
            self.connection.process_data_events()  # 非阻塞版的start_consuming
        return self.response

    def call(self, queuename, n):
        # 声明临时的回调队列
        result = self.channel.queue_declare(exclusive=False)
        self.callback_queue = result.method.queue
        self.corr_id = str(uuid.uuid4())
        self.channel.basic_publish(exchange='',
                                   routing_key=queuename,
                                   properties=pika.BasicProperties(
                                       reply_to=self.callback_queue,
                                       correlation_id = self.corr_id,
                                   ),
                                   body = n)
        return self.callback_queue, self.corr_id

class Threading(object):
    def __init__(self):
        self.info={}

    def check_all(self, cmd):
        '''
        查看已经有的任务id
        :param cmd:
        :return:
        '''
        for i in self.info:
            print('task id: %s, host: %s, command:%s' % (i, self.info[i][0], self.info[i][1]))

    def check_task(self, cmd_id):
        '''
        查看运行结果
        :param cmd_id:
        :return:
        '''
        try:
            id = int(cmd_id.split()[1])
            callack_queue = self.info[id][2]
            callack_id=self.info[id][3]
            client = Client()
            res = client.get_response(callack_queue, callack_id)
            print(res.decode())
            del self.info[id]
        except Exception as e:
            print(e)

    def run(self, cmd):
        comm = cmd.split(""")[1]
        hosts = cmd.split("--")
        host = hosts[1].split()[1:] #拿ip地址
        for i in host:
            id = random.randint(10000,99999)
            obj = Client()
            res = obj.call(i, comm)
            self.info[id] = [i,comm,res[0], res[1]]
        return self.info


    def ref(self, cmd):
        '''
        反射
        :param cmd:
        :return:
        '''
        str = cmd.split()[0]
        if hasattr(self,str):
            func = getattr(self,str)
            r = func(cmd)
            if r is not None:
                for i in r:
                    print('task id: %s, host: %s, command:%s' % (i, r[i][0], r[i][1]))

    def thread(self):
        while True:
            cmd = input("->>").strip()
            if not cmd:continue
            t1 = threading.Thread(target=self.ref, args=(cmd, ))
            t1.start()




obj = Threading()
res = obj.thread()