- Inheritance
- < ActiveSupport::Cache::Store < Object
A cache store implementation which stores data in Memcached: www.danga.com/memcached/
This is currently the most popular cache store for production websites.
Special features:
- Clustering and load balancing. One can specify multiple memcached servers, and MemCacheStore will load balance between all available servers. If a server goes down, then MemCacheStore will ignore it until it goes back online.
- Time-based expiry support. See write and the +:expires_in+ option.
- Per-request in memory cache for all communication with the MemCache server(s).
Attributes
| Name | Visibility | R/W | Description |
|---|---|---|---|
| addresses | public | R |
Methods
Class
| Visibility | Signature |
|---|---|
| public | new (*addresses) |
Instance
| Visibility | Signature |
|---|---|
| public | clear () |
| public | stats () |
| public | write (key, value, options = nil) |
Class Method Detail
new(*addresses)
Creates a new MemCacheStore object, with the given memcached server addresses. Each address is either a host name, or a host-with-port string in the form of "host_name:port". For example:
ActiveSupport::Cache::MemCacheStore.new("localhost", "server-downstairs.localnetwork:8229")
If no addresses are specified, then MemCacheStore will connect to localhost port 11211 (the default memcached port).
Instance Method Detail
clear()
stats()
write(key, value, options = nil)
Writes a value to the cache.
Possible options:
- +:unless_exist+ - set to true if you don‘t want to update the cache if the key is already set.
- +:expires_in+ - the number of seconds that this value may stay in the cache. See ActiveSupport::Cache::Store#write for an example.