Class: Mtodos::Cache

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

Overview

Local cache

Defined Under Namespace

Classes: NotFound

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Cache

Returns a new instance of Cache.



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

def initialize
  @cache_filename = 'mtodos.cache'
  @cache_file = File.join(Dir.pwd, @cache_filename)
  if File.file?(@cache_file)
    @hash = Marshal.load(File.read(@cache_file))
  else
    @hash = {}
    File.write(@cache_file, Marshal.dump(@hash))
  end
end

Instance Method Details

#get(key) ⇒ Object 



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# File 'lib/mtodos.rb', line 27

def get(key)
  begin
    @hash = Marshal.load(File.read(@cache_file))
  rescue Errno::ENOENT
    @hash = {}
  end
  having?(key)
end

#having?(key) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/mtodos.rb', line 36

def having?(key)
  if @hash[key]
    true
  else
    fail NotFound, 'NotFound key'
  end
end

#set(key, value) ⇒ Object 



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# File 'lib/mtodos.rb', line 22

def set(key, value)
  @hash[key] = value
  File.write(@cache_file, Marshal.dump(@hash))
end