xmlrpc cache server

cache_server

from SimpleXMLRPCServer import SimpleXMLRPCServer
import time


class CacheServer(object):
    """
    A very semplified cache server like memcache. :-)
    """
    def __init__(self):
        """
        Initialize a empty cache server istance.
        """
        self.cached_values = {}

    def set(self, key, value, timeout=None):
        """
        Add a key:value in cache.
       """
        self.cached_values[key] = {"value": value,
                                   "creation_time": time.time(),
                                   "timeout": timeout,
                                   }

    def get(self, key):
        """
        Get the relative value from cache if key exists or key exits for less
        time than timeout, otherwise None.
        """
        if key in self.cached_values:
            data = self.cached_values[key]
            if time.time() - data["creation_time"] < data["timeout"]:
                return data["value"]
            else:
                return None
        else:
            return None