所谓RPC,是远程过程调用(Remote Procedure Call)的简写,网上解释很多,简单来说,就是在当前进程调用其他进程的函数时,体验就像是调用本地写的函数一般。
本文实现的是在本地调用远端的类class对象的接口,也就是本地的client不实例化类对象,调用的是server端的类对象接口。
为了达到让调用层无须关心底层实现,拥有丝滑般的体验,就需要以下几个部分:
from multiprocessing import Pool from rpyc import Service from rpyc.utils.server import ThreadedServer class RemoteService(Service): def on_connect(self, conn): print(conn) '''供客户端调用的方法前得加exposed_''' def exposed_search(self, data): print(data) data['result'] = 'ok' return data def main(port): sr = ThreadedServer(service=RemoteService, hostname='127.0.0.1', port=port, auto_register=False) print(f'Server IP: {(sr.host,sr.port)}') sr.start() if __name__ == '__main__': pool = Pool(processes=2) pool.apply_async(main, args=(9998,)) pool.apply_async(main, kwds={'port':9999}) pool.close() pool.join()
import rpyc import time from multiprocessing import Pool def search_db(query,port): conn = rpyc.connect('localhost',port) '''调用时省略exposed_''' result = conn.root.search(query) time.sleep(1) print(result) conn.close() if __name__ == '__main__': pool = Pool(processes=2) pool.apply_async(search_db, args=({"match": {'name': 'user'}}, 9998)) pool.apply_async(search_db, kwds={'query': {"match": {'name': 'user'}},'port':9999}) pool.close() pool.join()