cement.ext.ext_memcached

Cement memcached extension module.

Note This extension has an external dependency on pylibmc. Cement explicitly does not include external dependencies for optional extensions.

• In Cement >=3.0.8 you must include cement[memcached] in your applications dependencies.
• In Cement <3.0.8 you must include pylibmc in your applications dependencies.

class cement.ext.ext_memcached.MemcachedCacheHandler(*args, **kw)

Bases: cement.core.cache.CacheHandler

This class implements the Cache Handler interface. It provides a caching interface using the pylibmc library.

class Meta

Bases: object

Handler meta-data.

_config(key)

This is a simple wrapper, and is equivalent to: self.app.config.get('cache.memcached', <key>).

Parameters:key (str) – The key to get a config value from the ‘cache.memcached’ config section. Returns:The value of the given key. Return type:unknown

_fix_hosts()

Useful to fix up the hosts configuration (i.e. convert a comma-separated string into a list). This function does not return anything, however it is expected to set the hosts value of the [cache.memcached] section (which is what this extension reads for it’s host configution).

Returns:None

_setup(*args, **kw)

Called during application initialization and must setup the handler object making it ready for the framework or the application to make further calls to it.

Parameters:app (instance) – The application object.

delete(key, **kw)

Delete an item from the cache for the given key. Any additional keyword arguments will be passed directly to the pylibmc delete function.

Parameters:key (str) – The key to delete from the cache.

get(key, fallback=None, **kw)

Get a value from the cache. Any additional keyword arguments will be passed directly to pylibmc get function.

Parameters:key (str) – The key of the item in the cache to get. Keyword Arguments:  fallback – The value to return if the item is not found in the cache. Returns:The value of the item in the cache, or the fallback value. Return type:unknown

purge(**kw)

Purge the entire cache, all keys and values will be lost. Any additional keyword arguments will be passed directly to the pylibmc flush_all() function.

set(key, value, time=None, **kw)

Set a value in the cache for the given key. Any additional keyword arguments will be passed directly to the pylibmc set function.

Parameters:

• key (str) – The key of the item in the cache to set.
• value – The value of the item to set.

Keyword Arguments:  

time (int) – The expiration time (in seconds) to keep the item cached. Defaults to expire_time as defined in the applications configuration.