Class: RefreshingCache

Inherits:
Hash
  • Object
show all
Defined in:
lib/refreshing_cache.rb

Constant Summary collapse

VERSION = 
"1.0.0"

Instance Method Summary collapse

Constructor Details

#initialize(timeout: timeout, check_proc: check_proc, value_proc: value_proc) ⇒ RefreshingCache

Returns a new instance of RefreshingCache.



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# File 'lib/refreshing_cache.rb', line 6

def initialize(timeout: timeout, check_proc: check_proc, value_proc: value_proc)
  @timeout = timeout

  @check_proc = check_proc
  @refresh_proc = value_proc

  # Stores key => timeout info
  @timeouts = {}

  # Actual underlying data we're caching
  @hash = {}
  super(@hash)
end

Instance Method Details

#[](key) ⇒ Object 



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# File 'lib/refreshing_cache.rb', line 20

def [](key)
  self[key] = refresh!(key) if regenerate_value?(key)
  super
end

#refresh!(key) ⇒ Object 



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# File 'lib/refreshing_cache.rb', line 25

def refresh!(key)
  val = refresh_proc.call(key, timeouts[key])
  timeouts[key] = Time.now
  val
end