Utilizando cache de django

This commit is contained in:
Daniel Cortes
2020-06-08 02:10:01 -04:00
parent 6498bf9c48
commit 0d2d23e2e1
3 changed files with 21 additions and 15 deletions

View File

@@ -77,6 +77,21 @@ DATABASES = {
}
}
"""Cache configuration"""
CACHES = {
"default": {
"BACKEND": "django_redis.cache.RedisCache",
"LOCATION": "redis://127.0.0.1:6379/1",
"OPTIONS": {
"CLIENT_CLASS": "django_redis.client.DefaultClient",
},
"KEY_PREFIX": "DJANGO_SERVER"
}
}
SESSION_ENGINE = "django.contrib.sessions.backends.cache"
SESSION_CACHE_ALIAS = "default"
"""How to validate password security"""
AUTH_PASSWORD_VALIDATORS = [
{

View File

@@ -5,6 +5,7 @@ djangorestframework # The framework to create the api
pygments # To make cute pretty prints XD
ratelimit # To rate limit request to musicbrainz
redis # To comunicate with redis
django-redis # Redis backend for django
requests # Saner request library
blake3 # To use blake3 hashing, since python seeds every hash on hashlib and is different between instances
country_list # To transform country codes to their names

View File

@@ -1,15 +1,12 @@
"""Modulo que contiene la clase/decorador Cache, contiene su logger y una conexión a redis"""
"""Modulo que contiene la clase/decorador Cache"""
import json
import logging
from blake3 import blake3 # pylint: disable=no-name-in-module
from redis import Redis
from django.conf import settings
from django.core.cache import cache
_log = logging.getLogger(__name__)
_log.addHandler(logging.NullHandler())
_redis = Redis()
class Cache:
""" Decorator that caches the result of a function
@@ -21,9 +18,6 @@ class Cache:
It is assumed that the function will returns a dictionary that can be formatted to json.
"""
# If caching is enabled
enabled = settings.CUSTOM_CACHE['enabled']
# Time to expire, by default a week
expire = 60 * 60 * 24 * 7
@@ -31,24 +25,20 @@ class Cache:
self.function = function
def __call__(self, *args, **kwargs):
if not self.enabled:
_log.info('Cache is disabled, executing function directly')
return self.function(*args, **kwargs)
_log.info('Caching function %s with argument list %s and dictionary %s',
self.function.__name__, args, kwargs)
key = f'{self.function.__name__}:{self.create_hash_key(args, kwargs)}'
_log.debug('Resolved key for function is "%s"', key)
if _redis.exists(key):
if cache.ttl(key) != 0:
_log.info('Key was in cache')
result = json.loads(_redis.get(key))
result = json.loads(cache.get(key))
return result
_log.info('Key was not in cache')
result = self.function(*args, **kwargs)
_redis.set(key, json.dumps(result), ex=self.expire)
cache.set(key, json.dumps(result), timeout=self.expire)
return result
@staticmethod