Class: ActionDispatch::Session::CacheStore

Inherits:
AbstractStore show all
Defined in:
actionpack/lib/action_dispatch/middleware/session/cache_store.rb

Overview

A session store that uses an ActiveSupport::Cache::Store to store the sessions. This store is most useful if you don't store critical data in your sessions and you don't need them to live for extended periods of time.

Options

  • cache - The cache to use. If it is not specified, Rails.cache will be used.

  • expire_after - The length of time a session will be stored before automatically expiring. By default, the :expires_in option of the cache is used.

Instance Method Summary collapse

Methods included from SessionObject

#loaded_session?, #prepare_session

Methods included from StaleSessionCheck

#extract_session_id, #load_session, #stale_session_check!

Methods included from Compatibility

#generate_sid

Constructor Details

#initialize(app, options = {}) ⇒ CacheStore

Returns a new instance of CacheStore.


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# File 'actionpack/lib/action_dispatch/middleware/session/cache_store.rb', line 14

def initialize(app, options = {})
  @cache = options[:cache] || Rails.cache
  options[:expire_after] ||= @cache.options[:expires_in]
  super
end

Instance Method Details

#delete_session(env, sid, options) ⇒ Object

Remove a session from the cache.


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# File 'actionpack/lib/action_dispatch/middleware/session/cache_store.rb', line 40

def delete_session(env, sid, options)
  @cache.delete(cache_key(sid))
  generate_sid
end

#find_session(env, sid) ⇒ Object

Get a session from the cache.


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# File 'actionpack/lib/action_dispatch/middleware/session/cache_store.rb', line 21

def find_session(env, sid)
  unless sid and session = @cache.read(cache_key(sid))
    sid, session = generate_sid, {}
  end
  [sid, session]
end

#write_session(env, sid, session, options) ⇒ Object

Set a session in the cache.


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# File 'actionpack/lib/action_dispatch/middleware/session/cache_store.rb', line 29

def write_session(env, sid, session, options)
  key = cache_key(sid)
  if session
    @cache.write(key, session, :expires_in => options[:expire_after])
  else
    @cache.delete(key)
  end
  sid
end