Class: Conversocial::Resources::QueryEngines::Cache

Inherits:
Object
  • Object
show all
Defined in:
lib/conversocial/resources/query_engines/cache.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(expiry = 60*60) ⇒ Cache

Returns a new instance of Cache.



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# File 'lib/conversocial/resources/query_engines/cache.rb', line 7

def initialize expiry=60*60
  @cache = {}
  @expiry = expiry.to_i
end

Instance Attribute Details

#expiry ⇒ Object (readonly)

Returns the value of attribute expiry.



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# File 'lib/conversocial/resources/query_engines/cache.rb', line 5

def expiry
  @expiry
end

Instance Method Details

#delete(key) ⇒ Object 



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# File 'lib/conversocial/resources/query_engines/cache.rb', line 27

def delete key
  @cache.delete key.to_s
end

#get(key) ⇒ Object 



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# File 'lib/conversocial/resources/query_engines/cache.rb', line 31

def get key
  if @cache[key.to_s]
    if (Time.now - @cache[key.to_s][:timestamp]) < expiry
      @cache[key.to_s][:value]
    else
      delete key
      nil
    end
  end
end

#get_or_set(key, options) ⇒ Object 



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# File 'lib/conversocial/resources/query_engines/cache.rb', line 12

def get_or_set key, options
  result = get key
  if result.nil?
    result = options[:get].call
    if options[:if].call result
      set key, result
    end
  end
  result
end

#set(key, value) ⇒ Object 



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# File 'lib/conversocial/resources/query_engines/cache.rb', line 23

def set key, value
  @cache[key.to_s] = {:value => value, :timestamp => Time.now}
end