mirror of
https://github.com/GSA/notifications-api.git
synced 2025-12-21 07:51:13 -05:00
96 lines
3.1 KiB
Python
96 lines
3.1 KiB
Python
|
import json
|
||
|
|
from contextlib import suppress
|
||
|
|
from datetime import timedelta
|
||
|
|
from functools import wraps
|
||
|
|
from inspect import signature
|
||
|
|
|
||
|
|
|
||
|
|
class RequestCache:
|
||
|
|
DEFAULT_TTL = int(timedelta(days=7).total_seconds())
|
||
|
|
|
||
|
|
def __init__(self, redis_client):
|
||
|
|
self.redis_client = redis_client
|
||
|
|
|
||
|
|
@staticmethod
|
||
|
|
def _get_argument(argument_name, client_method, args, kwargs):
|
||
|
|
with suppress(KeyError):
|
||
|
|
return kwargs[argument_name]
|
||
|
|
|
||
|
|
with suppress(ValueError, IndexError):
|
||
|
|
argument_index = list(signature(client_method).parameters).index(
|
||
|
|
argument_name
|
||
|
|
)
|
||
|
|
return args[argument_index]
|
||
|
|
|
||
|
|
with suppress(KeyError):
|
||
|
|
return signature(client_method).parameters[argument_name].default
|
||
|
|
|
||
|
|
raise TypeError(
|
||
|
|
"{}() takes no argument called '{}'".format(
|
||
|
|
client_method.__name__, argument_name
|
||
|
|
)
|
||
|
|
)
|
||
|
|
|
||
|
|
@staticmethod
|
||
|
|
def _make_key(key_format, client_method, args, kwargs):
|
||
|
|
return key_format.format(
|
||
|
|
**{
|
||
|
|
argument_name: RequestCache._get_argument(
|
||
|
|
argument_name, client_method, args, kwargs
|
||
|
|
)
|
||
|
|
for argument_name in list(signature(client_method).parameters)
|
||
|
|
}
|
||
|
|
)
|
||
|
|
|
||
|
|
def set(self, key_format, *, ttl_in_seconds=DEFAULT_TTL):
|
||
|
|
def _set(client_method):
|
||
|
|
@wraps(client_method)
|
||
|
|
def new_client_method(*args, **kwargs):
|
||
|
|
redis_key = RequestCache._make_key(
|
||
|
|
key_format, client_method, args, kwargs
|
||
|
|
)
|
||
|
|
cached = self.redis_client.get(redis_key)
|
||
|
|
if cached:
|
||
|
|
return json.loads(cached.decode("utf-8"))
|
||
|
|
api_response = client_method(*args, **kwargs)
|
||
|
|
self.redis_client.set(
|
||
|
|
redis_key,
|
||
|
|
json.dumps(api_response),
|
||
|
|
ex=int(ttl_in_seconds),
|
||
|
|
)
|
||
|
|
return api_response
|
||
|
|
|
||
|
|
return new_client_method
|
||
|
|
|
||
|
|
return _set
|
||
|
|
|
||
|
|
def delete(self, key_format):
|
||
|
|
def _delete(client_method):
|
||
|
|
@wraps(client_method)
|
||
|
|
def new_client_method(*args, **kwargs):
|
||
|
|
try:
|
||
|
|
api_response = client_method(*args, **kwargs)
|
||
|
|
finally:
|
||
|
|
redis_key = self._make_key(key_format, client_method, args, kwargs)
|
||
|
|
self.redis_client.delete(redis_key)
|
||
|
|
return api_response
|
||
|
|
|
||
|
|
return new_client_method
|
||
|
|
|
||
|
|
return _delete
|
||
|
|
|
||
|
|
def delete_by_pattern(self, key_format):
|
||
|
|
def _delete(client_method):
|
||
|
|
@wraps(client_method)
|
||
|
|
def new_client_method(*args, **kwargs):
|
||
|
|
try:
|
||
|
|
api_response = client_method(*args, **kwargs)
|
||
|
|
finally:
|
||
|
|
redis_key = self._make_key(key_format, client_method, args, kwargs)
|
||
|
|
self.redis_client.delete_by_pattern(redis_key)
|
||
|
|
return api_response
|
||
|
|
|
||
|
|
return new_client_method
|
||
|
|
|
||
|
|
return _delete
|