Redis实现类似同步方法调用的功能（一）

import redis
import time
import json
import threading

host = 'localhost'
port = 6322
queue = 'myqueue'


class Server(threading.Thread):

    def __init__(self):
        threading.Thread.__init__(self)

    def run(self):
        pool = redis.BlockingConnectionPool(host=host, port=port, db='0')
        conn = redis.Redis(connection_pool=pool)
        idx = 0

        while True:
            idx = idx + 1

            key = str(idx)
            data = "request_" + key
            request = {'id': key, 'data': data}
            print 'Server: Send request: %s' % request
            conn.lpush(queue, json.dumps(request))

            response = conn.brpop(key, 2)
            if response:
                print 'Server: Receive response: %s' % response[1]
            else:
                print "Server: Timeout!!!"

            time.sleep(1)


class Client(threading.Thread):

    def __init__(self):
        threading.Thread.__init__(self)

    def run(self):
        pool = redis.BlockingConnectionPool(host=host, port=port, db='0')
        conn = redis.Redis(connection_pool=pool)

        while True:
            msg = conn.brpop(queue)[1]
            print 'Client: Receive request: %s' % msg

            time.sleep(0.1)

            d = json.loads(msg)
            key = d.get('id')
            d['data'] = "response_" + key
            print 'Client: Send response: %s' % d
            conn.lpush(key, json.dumps(d))
            conn.expire(key, 5)


server = Server()
server.start()

client = Client()
client.start()