Class: YAMLCache

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

Instance Method Summary collapse

Constructor Details

#initialize(path) ⇒ YAMLCache

Returns a new instance of YAMLCache.



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# File 'lib/yaml_cache.rb', line 4

def initialize(path)
  @path = path
  @store = load_store
end

Instance Method Details

#cache(key, expiration, &block) ⇒ Object 



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# File 'lib/yaml_cache.rb', line 18

def cache(key, expiration, &block)
  value = nil
  if @store.has_key?(key)
    if @store[key][:expiration] == nil ||
        (@store[key][:expiration] - Time.now.to_i) <= 0
      value = block.call
      store(key, value, expiration)
    else
      value = @store[key][:value]
    end
  else
    value = block.call
    store(key, value, expiration)
  end

  File.write(@path, @store.to_yaml)

  return value
end

#read(key) ⇒ Object 



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# File 'lib/yaml_cache.rb', line 14

def read(key)
  @store[key][:value]
end

#write(key, value = nil, &block) ⇒ Object 



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# File 'lib/yaml_cache.rb', line 9

def write(key, value=nil, &block)
  store(key, block ? block.call : value)
  File.write(@path, @store.to_yaml)
end