Class: ActiveSupport::Cache::MemoryStore

Inherits:
Store show all
Defined in:
lib/active_support/cache/memory_store.rb

Overview

A cache store implementation which stores everything into memory in the same process. If you're running multiple Ruby on Rails server processes (which is the case if you're using mongrel_cluster or Phusion Passenger), then this means that your Rails server process instances won't be able to share cache data with each other. If your application never performs manual cache item expiry (e.g. when you're using generational cache keys), then using MemoryStore is ok. Otherwise, consider carefully whether you should be using this cache store.

MemoryStore is not only able to store strings, but also arbitrary Ruby objects.

MemoryStore is not thread-safe. Use SynchronizedMemoryStore instead if you need thread-safety.

Direct Known Subclasses

DRbStore, SynchronizedMemoryStore

Instance Method Summary collapse

Methods inherited from Store

#decrement, #fetch, #increment, #silence!

Constructor Details

#initializeMemoryStore

Returns a new instance of MemoryStore.


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# File 'lib/active_support/cache/memory_store.rb', line 18

def initialize
  @data = {}
end

Instance Method Details

#clearObject


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# File 'lib/active_support/cache/memory_store.rb', line 47

def clear
  @data.clear
end

#delete(name, options = nil) ⇒ Object


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# File 'lib/active_support/cache/memory_store.rb', line 32

def delete(name, options = nil)
  super
  @data.delete(name)
end

#delete_matched(matcher, options = nil) ⇒ Object


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# File 'lib/active_support/cache/memory_store.rb', line 37

def delete_matched(matcher, options = nil)
  super
  @data.delete_if { |k,v| k =~ matcher }
end

#exist?(name, options = nil) ⇒ Boolean

Returns:

  • (Boolean)

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# File 'lib/active_support/cache/memory_store.rb', line 42

def exist?(name,options = nil)
  super
  @data.has_key?(name)
end

#read(name, options = nil) ⇒ Object


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# File 'lib/active_support/cache/memory_store.rb', line 22

def read(name, options = nil)
  super
  @data[name]
end

#write(name, value, options = nil) ⇒ Object


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# File 'lib/active_support/cache/memory_store.rb', line 27

def write(name, value, options = nil)
  super
  @data[name] = value.freeze
end