Set of python caches : in-memory and/or redis
Welcome to pysol
Copyright (C) 2013/2017 Laurent Labatut / Laurent Champagnac
pysolcache is a set of python caches : in-memory and/or redis.
Usefull to handle L1 (memory) and L2 (redis) cache for python daemons.
In all cases, serialization/deserialization of stored datas have to be done at client side (ie, serialize as u wish, ujson or equivalent)
All caches are instrumented by Meters (pysolmeters).
- A pure python memory cache storing string/binary keys to string/binary values
- Max bytes capped
- Max items count capped
- Items TTLs
- LRU evictions
- Watchdog evictions
- A redis backed cache, storing string/binary keys to string/binary values
- A high level cache, coupling MemoryCache adn RedisCache, which handle respectively L1 cache (in memory) and L2 cache (inside redis)
- A high level cache, storing internal data as tuple (ms_added, ttl_ms, string/binary data)
- Provided same level of functionality as HighCache but is able to perform an automatic L1 put in case of L2 hit and L1 miss
It is gevent (co-routines) based.
c = MemoryCache() # Put, ttl 60000 ms c.put("keyA", "valA", 60000) # Get v = c.get("keyA") # Remove v = c.remove("keyA") # Stop c.stop_cache()
c = RedisCache() # Put, ttl 60000 ms c.put("keyA", "valA", 60000) # Get v = c.get("keyA") # Remove v = c.remove("keyA") # Stop c.stop_cache()
HighCache / HighCacheEx
mc = MemoryCache() rc = RedisCache() hc = HighCache(mc, rc) # Put, ttl 60000 ms, in L1 and L2 hc.put("keyA", "valA", 60000, l1=True, l2=True) # Get from L1 only v = c.get("keyA", l1=True, l2=False) # Get from L2 only v = c.get("keyA", l1=False, l2=True) # Try get from L1, if miss, try from L2 v = c.get("keyA", l1=True, l2=True) # Remove from L1 v = c.remove("keyA", l1=True, l2=False) # Stop hc.stop_cache()
- We are pep8 compliant (as far as we can, with some exemptions)
- We use a right margin of 360 characters (please don't talk me about 80 chars)
- All unittest files must begin with
Test, should implement setUp and tearDown methods
- All tests must adapt to any running directory
- The whole project is backed by gevent (http://www.gevent.org/)
- We use docstring (:return, :rtype, :param, :type etc), they are mandatory
- We use PyCharm "noinspection", feel free to use them
- Debian 10 or greater, x64, Python 3.7
To run unittests, you will need:
- redis-server installed and serving 6379 without creds.
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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