class Sprockets::Cache::MemoryStore

Public: Basic in memory LRU cache.

Assign the instance to the Environment#cache.

environment.cache = Sprockets::Cache::MemoryStore.new(1000)

See Also

ActiveSupport::Cache::MemoryStore

Constants

DEFAULT_MAX_SIZE

Internal: Default key limit for store.

Public Class Methods

new(max_size = DEFAULT_MAX_SIZE) click to toggle source

Public: Initialize the cache store.

max_size - A Integer of the maximum number of keys the store will hold.

(default: 1000).
# File lib/sprockets/cache/memory_store.rb, line 22
def initialize(max_size = DEFAULT_MAX_SIZE)
  @max_size = max_size
  @cache = {}
  @mutex = Mutex.new
end

Public Instance Methods

clear(options=nil) click to toggle source

Public: Clear the cache

Returns true

# File lib/sprockets/cache/memory_store.rb, line 76
def clear(options=nil)
  @mutex.synchronize do
    @cache.clear
  end
  true
end
get(key) click to toggle source

Public: Retrieve value from cache.

This API should not be used directly, but via the Cache wrapper API.

key - String cache key.

Returns Object or nil or the value is not set.

# File lib/sprockets/cache/memory_store.rb, line 35
def get(key)
  @mutex.synchronize do
    exists = true
    value = @cache.delete(key) { exists = false }
    if exists
      @cache[key] = value
    else
      nil
    end
  end
end
inspect() click to toggle source

Public: Pretty inspect

Returns String.

# File lib/sprockets/cache/memory_store.rb, line 67
def inspect
  @mutex.synchronize do
    "#<#{self.class} size=#{@cache.size}/#{@max_size}>"
  end
end
set(key, value) click to toggle source

Public: Set a key and value in the cache.

This API should not be used directly, but via the Cache wrapper API.

key - String cache key. value - Object value.

Returns Object value.

# File lib/sprockets/cache/memory_store.rb, line 55
def set(key, value)
  @mutex.synchronize do
    @cache.delete(key)
    @cache[key] = value
    @cache.shift if @cache.size > @max_size
  end
  value
end