Class: Rx::Cache::LRUCache

Inherits:
Object
  • Object
show all
Defined in:
lib/rx/cache/lru_cache.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ LRUCache

Returns a new instance of LRUCache.



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# File 'lib/rx/cache/lru_cache.rb', line 6

def initialize
  @heap = Rx::Util::Heap.new do |a, b|
    a[1] < b[1]
  end
  @lock = Mutex.new
  @map  = Hash.new
end

Instance Method Details

#cache(k, expires_in = 60) ⇒ Object 



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# File 'lib/rx/cache/lru_cache.rb', line 14

def cache(k, expires_in = 60)
  if value = get(k)
    return value
  end
  
  value = yield
  put(k, value, expires_in)
  value
end

#get(k) ⇒ Object 



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# File 'lib/rx/cache/lru_cache.rb', line 24

def get(k)
  clean!

  lock.synchronize do
    map[k]
  end
end

#put(k, v, expires_in = 60) ⇒ Object 



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# File 'lib/rx/cache/lru_cache.rb', line 32

def put(k, v, expires_in = 60)
  lock.synchronize do
    map[k] = v
    heap << [k, Time.now + expires_in]
  end
end