基于RabbitMQ的RPC通信

基于RabbitMQ的RPC通信

• 版本信息
• 操作步骤

当需要调用局域网中的服务时,可以用frp进行穿透,也可以在公网搭建RabbitMQ服务器做消息中转,本文演示了这个步骤。

版本信息

操作步骤

搭建RabbitMQ(默认用户名:guest 密码:guest )

docker run -d --name rabbitmq -p 5671:5671 -p 5672:5672 -p 4369:4369 \
				-p 25672:25672 -p 15671:15671 -p 15672:15672 rabbitmq:management

服务端实现(srv.py)

# -*- coding:utf-8 -*-
import pika
import time
import sys
import os

def request_handler(message):
    #content=message.decode('utf-8')
    #print(content)
    return message
    
def on_request(ch, method, props, body):
    response = request_handler(body)
    ch.basic_publish(exchange="",
                     routing_key=props.reply_to,
                     properties=pika.BasicProperties(
                         content_encoding='utf-8',
                         correlation_id=props.correlation_id,
                     ),
                     body=str(response))
    ch.basic_ack(delivery_tag=method.delivery_tag)

while True:
    try:
        credentials = pika.PlainCredentials("guest", "guest")
        connection = pika.BlockingConnection(pika.ConnectionParameters("127.0.0.1",port=5672, credentials=credentials))
        channel = connection.channel()
        channel.queue_declare(queue="rpc_queue")    
        channel.basic_consume("rpc_queue", on_request)
        print(" waiting requests")
        channel.start_consuming()
    except:
        print("error restart")
        pass
    time.sleep(1)

客户端实现(client.py)

# -*- coding:utf-8 -*-
import os
import io
import time
import uuid
import sys
import requests
import warnings
import numpy as np
import pika
import time
import sys
import traceback
import json
import queue
import uuid
import time
import argparse

class MqRpcClient(object):
    def __init__(self):
        credentials = pika.PlainCredentials("guest", "guest")
        self.connection = pika.BlockingConnection(pika.ConnectionParameters("127.0.0.1",port=5672, credentials=credentials))
        self.channel = self.connection.channel()
        result = self.channel.queue_declare(queue="", exclusive=True)
        self.callback_queue = result.method.queue
        self.channel.basic_consume(self.callback_queue, self.on_response, True)

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

    def send(self, message,timeout=5):
        self.response = None
        self.corr_id = str(uuid.uuid4())
        self.channel.basic_publish(exchange="",
                                   routing_key="rpc_queue",
                                   properties=pika.BasicProperties(
                                       reply_to=self.callback_queue,
                                       content_encoding='utf-8',
                                       correlation_id=self.corr_id,
                                   ),
                                   body=message.encode('utf-8')) 
        t0=time.time()
        while self.response is None:
            self.connection.process_data_events()
            t1=time.time()
            if t1-t0>timeout:
                return None
        return self.response

def send_message(message,loop):
    rpc = MqRpcClient()
    t0=time.time()
    for i in range(loop):
        response = rpc.send(message,1)
        if response is None and response==message:
            print("Failed")
            break
    t1=time.time()
    print("qps:{:.2f}".format(loop/(t1-t0)))
    return True

if __name__ == "__main__":
    parse = argparse.ArgumentParser()
    parse.add_argument('--msg', type=str, default='', help='')
    parse.add_argument('--loop', type=int, default=1, help='')
    args = parse.parse_args()
    send_message(args.msg,args.loop)

性能测试(4919 qps)

# 安装依赖
pip3 install pika==1.3.1

# 启动服务端(服务端收到请求后,直接回复)
python3 srv.py &

# 客户端多路请求,测试总吞吐
cat <<EOF | tee rpc.sh
for i in \`seq 0 \$1\`
do
  python3 client.py  --msg HelloWorld --loop 1000 &
done
wait
EOF
bash rpc.sh  16 | awk -F: '{SUM+=$2};END{print SUM}'