Class: Abst::Cache

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

Direct Known Subclasses

SystemCache

Constant Summary collapse

PREFIX = 
'abst_cache_'
CACHE_DIR = 
CACHE_DIR

Class Method Summary collapse

Class Method Details

.[](cache_id) ⇒ Object 



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# File 'lib/include/cache.rb', line 25

def self.[](cache_id)
  path = get_path(cache_id)

  return nil unless FileTest.exist?(path)
  open(path) {|io| return Marshal.load(io)}
end

.[]=(cache_id, data) ⇒ Object 



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# File 'lib/include/cache.rb', line 12

def self.[]=(cache_id, data)
  if nil == data
    delete(cache_id)
    return
  end

  path = get_path(cache_id)
  dir = File.dirname(path)

  mkdir(dir) unless FileTest.exist?(dir)
  open(path, "w") {|io| Marshal.dump(data, io)}
end

.clear ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/include/cache.rb', line 38

def self.clear
  raise NotImplementedError
end

.delete(cache_id) ⇒ Object 



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# File 'lib/include/cache.rb', line 32

def self.delete(cache_id)
  path = get_path(cache_id)

  File.delete(path) if FileTest.exist?(path)
end

.exist?(cache_id) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/include/cache.rb', line 42

def self.exist?(cache_id)
  return FileTest.exist?(get_path(cache_id))
end

.get_path(cache_id) ⇒ Object 



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# File 'lib/include/cache.rb', line 46

def self.get_path(cache_id)
  cache_id = cache_id.to_s
  unless /^[a-z0-9_]+$/ =~ cache_id
    raise ArgumentError, "Invalid cache_id. (Only a-z 0-9 and _ are available)"
  end

  return self::CACHE_DIR + self::PREFIX + cache_id
end

.mkdir(dir) ⇒ Object 



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

def self.mkdir(dir)
  pdir = File.dirname(dir)
  mkdir(pdir) unless FileTest.exist?(pdir)
  Dir::mkdir(dir)
end