django的内存缓存

内存缓存是进程之内的，所以不能进程共享：

CACHES = {
    'default':{
        'BACKEND':'django.core.cache.backends.locmem.LocMemCache',
        'LOCATION': 'unique-snowflake'
    }
}

from django.core.cache import cache

def get_terminal_info(self):
    if cache.has_key("terminal_info"):
        return cache.get("terminal_info")
    else:
        return {}


def set_terminal_info(self, msm, single_terminal_info):
    self.terminal_lock.acquire()
    if cache.has_key("terminal_info"):
        all_terminal_info = cache.get("terminal_info")
    else:
        all_terminal_info = {}
    if msm in all_terminal_info:
        msm_terminal_info = all_terminal_info[msm]
    else:
        msm_terminal_info = {}
    for attr_key in single_terminal_info:
        msm_terminal_info[attr_key] = single_terminal_info[attr_key]
    all_terminal_info[msm] = msm_terminal_info
    cache.set("terminal_info", all_terminal_info, None)
    self.terminal_lock.release()
    LogUtil.info("save data to cache {} info {}".format(msm, single_terminal_info))