Ihe ndabere nke ịrụ ọrụ na zmq na Python, na-ekepụta ụlọ ahịa igodo/ọnụ ahịa dị mfe

Okwu Mmalite

Ka anyị lee ihe atụ nke nchekwa igodo/uru dị mfe dị ka memcache. Emebere ya ngwa ngwa - echekwara data ahụ na ebe nchekwa, na nhazi hashmap. A na-enweta ha site na oghere tcp. Na Python, hashmap bụ dict oge niile. Maka ịnweta anyị ga-eji zeromq.

ukpụhọde

Iji wụnye ngwugwu a na debian/ubuntu naanị tinye na njikwa ahụ
sudo apt-get install libzmq-dev
sudo pip install zmq

Usoro

Ka anyị dee otu klas iji soro anyị rụọ ọrụ ihe nkesa:
Ụdị oghere zmq ejiri bụ REQ (REQuest, arịrịọ), anyị na-eziga arịrịọ ma chere maka nzaghachi.
Iji chekwaa ma bufee ụdị data ọ bụla na netwọkụ, anyị na-eji modul pickle ọkọlọtọ. Ọrụ "protocol" bụ ụkpụrụ atọ: (iwu, igodo, data)

import zmq
import pickle

class SuperCacher:
    def __init__(self):
        context = zmq.Context()
        self.socket = context.socket(zmq.REQ)
        self.socket.connect('tcp://127.0.0.1:43000')

    def get(self, key):
        self.socket.send(pickle.dumps(('get', key, None)))
        return pickle.loads(self.socket.recv())

    def set(self, key, data):
        self.socket.send(pickle.dumps(('set', key, data)))
        return self.socket.recv() == b'ok'

Jiri

cache = SuperCacher()
cache.set ('igodo', 'uru')
cache.get('igodo')

Dị ka ihe omume ụlọ, kwalite mmejuputa ya site n'ịgbakwunye ike ịkọwa adreesị / ọdụ ụgbọ mmiri mgbe ị na-emepụta ihe atụ nke klaasị.

Ugbu a, anyị ga-ede ya n'onwe anyị. nkesa.
N'oge a, oghere REP (REPly, nzaghachi) na-eji - anyị na-echere arịrịọ ahụ, na-eziga nzaghachi. Anyị na-atụgharị arịrịọ ahụ wee zaghachi ma ọ bụ 'ọ dị mma' n'ihe banyere ide, ma ọ bụ na data / Ọ dịghị onye ọ bụla n'ihe gbasara ịgụ.

import pickle
import json
import zmq

def run_daemon():
    memory = {}

    context = zmq.Context()
    socket = context.socket(zmq.REP)
    socket.bind('tcp://127.0.0.1:43000')

    while True:
        try:
            command, key, data = pickle.loads(socket.recv())
            if command == 'set':
                memory[key] = data
                socket.send(b'ok')
            elif command == 'get':
                result = memory.get(key, None)
                socket.send(pickle.dumps(result))
        except Exception as e:
            print(e)

if __name__ == '__main__':
    run_daemon()

Iji nwalee ihe niile ọnụ, anyị na-amalite ihe nkesa na iwu
python daemon.py

Na taabụ na-esote, malite Python na ọnọdụ mmekọrịta.

>>> from lib import SuperCacher
>>> cache=SuperCacher()
>>> cache.set('key', 'value')
True
>>> cache.get('key')
'value'

Oh ọrụ ebube, ọ na-arụ ọrụ! Ugbu a ị nwere ike dee n'enweghị nsogbu na mmalite gị "mmepe nchekwa uru bara site na iji usoro zmq"

isi: www.habr.com