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CACHE GUIOSOFT
Caching data using files, Redis or local SQLite
[]
Local files for caching
from cache_gs import CacheGS
# Storage on local directory
file_cache = CacheGS('path://directory_for_cache_storage')
# Storage on local SQLite database
slite_cache = CacheGS('sqlite://directory_or_file_for_storage')
# Storage on Redis
redis_cache = CacheGS('redis://host:6379')
[More options for redis](#Redis options and example)
Usage
Like INI files, data is grouped in section/key names.
Writing value
cache.set_value(section, key, value, ttl: int = 0)
# ttl is the life time of value in seconds from the time is created
Reading value
value = cache.get_value(section, key, default=None)
Deleting value
cache.delete_value(section, key)
Purging expired data
- On Redis cache, this is handled by the server, automatically.
- On SQLite cache, purging is executing on every instantiation.
- On Local File cache, purging is automatically executed once a day, checked on every instantiation.
Force purging expired data
cache.purge_expired()
Redis options and example
Redis connection uses the redis-py component from Andy McCurdy. You can use the same connection strings that the Redis class uses:
-
redis://[[username]:[password]]@localhost:6379/0
-
rediss://[[username]:[password]]@localhost:6379/0
-
unix://[[username]:[password]]@/path/to/socket.sock?db=0
Three URL schemes are supported: - ```redis://`` <http://www.iana.org/assignments/uri-schemes/prov/redis>`_ creates a normal TCP socket connection - ```rediss://`` <http://www.iana.org/assignments/uri-schemes/prov/rediss>`_ creates a SSL wrapped TCP socket connection - ``unix://`` creates a Unix Domain Socket connection There are several ways to specify a database number. The parse function will return the first specified option: 1. A ``db`` querystring option, e.g. redis://localhost?db=0 2. If using the redis:// scheme, the path argument of the url, e.g. redis://localhost/0 3. The ``db`` argument to this function. If none of these options are specified, db=0 is used.
Redis on docker
docker-compose.yaml
redis:
container_name: 'redis'
image: 'redis:4-alpine'
command: redis-server --requirepass 1234
ports:
- '6379:6379'
For testing, just run:
docker-compose up
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