Django分析之使用redis缓存服务器

redis相信大家都很熟悉了，和memcached一样是一个高性能的key-value数据库，至于什么是缓存服务器，度娘都有很明白的介绍了，我在这里就不一一介绍了。

下面我就来介绍如何在Django中配置使用redis数据库，首先是先安装redis了，win中执行

	#安装Redis服务器端
	~ sudo apt-get install redis-server

在Ubuntu中执行下面这句命令：

	#安装Redis服务器端
	~ sudo apt-get install redis-server

settine.py

# redis setting
# CACHES = {
#     'default': {
#         'BACKEND': 'django_redis.cache.RedisCache',
#         'LOCATION': '127.0.0.1:6379',
#         "OPTIONS": {
#             "CLIENT_CLASS": "django_redis.client.DefaultClient",
#         },
#     },
# }

CACHES = {
    'default': {
        'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache',
        'LOCATION': '127.0.0.1:11211',
    }
}

# timeout
# REDIS_TIMEOUT = 30*60
REDIS_TIMEOUT = 10

from django.conf import settings
from django.core.cache import cache
import json

# read cache user id
def read_from_cache(user_name='public'):
    """
    读取缓存
    :param user_name:
    :return:
    """
    key = 'test1_'+user_name
    value = cache.get(key)
    if value == None:
        data = None
    else:
        data = json.loads(value)
    return data


def write_to_cache(key, value):
    """
    写入缓存
    :param value:
    :param user_name:
    :return:
    """
    cache.set(key, json.dumps(value), settings.REDIS_TIMEOUT)

from django.http import HttpResponse

def redis_caches():
    def _deco(func):
        def __deco(*args, **kwargs):
            obj, request = args
            if request.method == 'GET':  # 如果请求是已Get方式请求的，则调用get方式的方法
                data = request.GET.dict()
            elif request.method == 'POST':  # 如果是post则调用这个方式
                data = request.POST.dict()
                
            class_name = obj.__class__.__name__
            cache = read_from_cache()
            if cache:
                print '%s to  cache'%class_name
                result = cache
            else:
                print '%s to  view'%class_name
                result = obj.process(data, request)
                print 'func  return  ', result
                write_to_cache('test1_public', result)
            return HttpResponse(result)
        return __deco
    return _deco