ActiveSupport::Cache::MemCacheStore

• activesupport/lib/active_support/cache/mem_cache_store.rb

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.

• clear
• new
• stats
• write

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).

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.