Memcached

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Memcached
Introduction
The Memcached Extension includes the MemcachedCacheHandler and provides application caching and key/value store support via Memcached.
Documentation References:
​Caching​
API References:
​Cement Memcached Extension​
​Pylibmc Library​
Requirements
Pylibmc
There are known issues installing pylibmc on macOS/Homebrew via PIP.  This post might be helpful.
Cement 3.0.8+:
pip install cement[memcached]
Applications using Cement <3.0.8 should continue to include pylibmc in their dependencies.
Configuration
This extension honors the following config settings under a [cache.memcached] section in any configuration file:
Setting
Description
expire_time
The default time in seconds to expire items in the cache.  Default: 0 (does not expire)
hosts
List of memcached servers (comma separated if using a plain text based config handler like configparser).
Usage
Example: Using Memcached Cache Handler
myapp.py
from cement import App
from cement.utils.misc import init_defaults
​
CONFIG = init_defaults('myapp', 'cache.memcached')
CONFIG['cache.memcached']['expire_time'] = 300 # seconds
CONFIG['cache.memcached']['hosts'] = ['127.0.0.1']
​
class MyApp(App):
    class Meta:
        label = 'myapp'
        config_defaults = CONFIG
        extensions = ['memcached']
        cache_handler = 'memcached'
​
with MyApp() as app:
    # Run the app
    app.run()
​
    # Set a cached value
    app.cache.set('my_key', 'my value')
​
    # Get a cached value
    app.cache.get('my_key')
​
    # Delete a cached value
    app.cache.delete('my_key')
​
    # Delete the entire cache
    app.cache.purge()
~/.myapp.conf
[myapp]
​
# set the cache handler to use
cache_handler = memcached
​
​
[cache.memcached]
​
# time in seconds that an item in the cache will expire
expire_time = 3600
​
# comma seperated list of memcached servers
hosts = 127.0.0.1, cache.example.com
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Introduction
Requirements
Configuration
Usage