Class: CFC::Cache

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

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Cache

Returns a new instance of Cache.



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# File 'lib/cfc/cache.rb', line 6

def initialize
  @cache = {}
end

Instance Method Details

#[](key) ⇒ Object 



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# File 'lib/cfc/cache.rb', line 14

def [](key)
  valid?(key) ? @cache[key].data : nil
end

#[]=(key, value) ⇒ Object 



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# File 'lib/cfc/cache.rb', line 18

def []=(key, value)
  @cache[key] = OpenStruct.new(data: value, expiry: nil)
end

#fetch(key, expiry: nil) ⇒ Object 



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# File 'lib/cfc/cache.rb', line 30

def fetch(key, expiry: nil)
  if valid?(key)
    @cache[key].data
  else
    data = block_given? ? yield : nil
    write(key, data, expiry: expiry)
    data
  end
end

#include?(key) ⇒ Boolean Also known as: valid?

Returns:

  • (Boolean) 


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# File 'lib/cfc/cache.rb', line 10

def include?(key)
  @cache.include?(key) && (@cache[key].expiry.nil? || @cache[key].expiry >= DateTime.now.to_time.to_i)
end

#read(key) ⇒ Object 



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# File 'lib/cfc/cache.rb', line 26

def read(key)
  valid?(key) ? @cache[key].data : nil
end

#write(key, value, expiry: nil) ⇒ Object 



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# File 'lib/cfc/cache.rb', line 22

def write(key, value, expiry: nil)
  @cache[key] = OpenStruct.new(data: value, expiry: expiry)
end