Nā kumu o ka hana ʻana me zmq i ka python, e hana ana i kahi kī maʻalahi

Hōʻike

E nānā i kahi laʻana o kahi kī maʻalahi/waiwai mālama, e like me memcache. Hoʻolālā maʻalahi ia - mālama ʻia ka ʻikepili i ka hoʻomanaʻo, ma kahi ʻano hashmap. Loaʻa iā lākou ma o kahi socket tcp. Ma Python, ʻo ka hashmap kahi ʻōlelo maʻamau. No ke komo ʻana e hoʻohana mākou i ka zeromq.

hoʻoponopono

No ka hoʻokomo ʻana i kēia pūʻolo ma debian/ubuntu, e komo wale i ka console
sudo apt-get install libzmq-dev
sudo pip install zmq

kuhi

E kākau mākou i papa e hana pū me kā mākou kikowaena:
ʻO ke ʻano o ka zmq socket i hoʻohana ʻia ʻo REQ (REQuest, request), hoʻouna mākou i kahi noi a kali i kahi pane.
No ka mālama a hoʻouna ʻana i kekahi ʻano ʻikepili ma luna o ka pūnaewele, hoʻohana mākou i ka module pickle maʻamau. ʻO ka hana "protocol" he tuple o ʻekolu mau waiwai: (kauoha, kī, ʻikepili)

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'

E hoʻohana

huna = SuperCacher()
cache.set('key', 'value')
cache.get('key')

Ma ke ʻano he haʻawina home, hoʻomaikaʻi i ka hoʻokō ʻana ma ka hoʻohui ʻana i ka hiki ke kuhikuhi i kahi helu wahi / awa i ka wā e hana ai i kahi laʻana o kahi papa.

I kēia manawa e kākau kāua i ke kikowaena ponoʻī.
I kēia manawa hoʻohana ʻia ke kumu REP(REPly, pane) - ke kali nei mākou i ka noi, e hoʻouna ana i kahi pane. Hoʻopili mākou i ka noi a pane aku me ka 'ok' i ka hihia o ke kākau ʻana, a i ʻole me ka ʻikepili / ʻAʻohe i ka hihia o ka heluhelu.

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()

No ka ho'āʻoʻana i nā mea a pau, hoʻomaka mākou i ke kikowaena me ke kauoha
python daemon.py

Ma ka ʻaoʻao aʻe, e hoʻolauna i ka python ma ke ʻano pāʻani.

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

ʻO ka hana mana! I kēia manawa hiki iā ʻoe ke kākau palekana i kāu hoʻomau "ka hoʻomohala ʻana i ka mālama waiwai nui me ka hoʻohana ʻana i ka protocol zmq"

Source: www.habr.com