Class: VirtualFS::RuntimeCache

Inherits:
Object
  • Object
show all
Defined in:
lib/virtualfs/runtime_cache.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(opts = {}) ⇒ RuntimeCache

Returns a new instance of RuntimeCache.



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# File 'lib/virtualfs/runtime_cache.rb', line 5

def initialize(opts={})
  @expires_after = opts[:expires_after] || -1

  @store = {}
  @times = {}
end

Instance Attribute Details

#expires_after ⇒ Object

Returns the value of attribute expires_after.



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# File 'lib/virtualfs/runtime_cache.rb', line 3

def expires_after
  @expires_after
end

Instance Method Details

#cache(key, &proc) ⇒ Object 



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# File 'lib/virtualfs/runtime_cache.rb', line 12

def cache(key, &proc)
  access_time = Time.now

  # Invalidate cache after some time
  if (@expires_after > -1) && ((access_time - (@times[key] || access_time)) > @expires_after)
    @times[key] = access_time
    @store[key] = nil
  end

  @times[key] ||= access_time
  @store[key] ||= yield
end