Class: CacheTree::Manager

Inherits:
Object
  • Object
show all
Includes:
Singleton
Defined in:
lib/cache_tree.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Manager

Returns a new instance of Manager.



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# File 'lib/cache_tree.rb', line 15

def initialize
  @current_link   = nil
  @configuration  = { :perform_caching => true }
end

Instance Attribute Details

#configuration ⇒ Object

Returns the value of attribute configuration.



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# File 'lib/cache_tree.rb', line 13

def configuration
  @configuration
end

Instance Method Details

#exists? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/cache_tree.rb', line 24

def exists?
  return false unless @configuration[:perform_caching]
  btree_key_files = @current_link.map(:up) { |node| node.btree_key }
  return false unless btree_key_files.all? { |btree_key| File.exists?(btree_key) }
  @current_link.map(:up) { |node| node.load_btree_key }
  File.exists?(@current_link.cache_file)
end

#expire! ⇒ Object 



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# File 'lib/cache_tree.rb', line 32

def expire!
  @current_link.expire
end

#read ⇒ Object 



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

def read
  @current_link.map(:up) { |node| node.load_btree_key }
  File.read(@current_link.cache_file)
end

#save(data) ⇒ Object 



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# File 'lib/cache_tree.rb', line 41

def save(data)
  @current_link.map(:up) { |node| node.save }
  FileUtils.mkdir_p(File.dirname(@current_link.cache_file))
  File.open(@current_link.cache_file, 'w+') { |file| file.write data }
end

#use(cache_link) ⇒ Object 



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# File 'lib/cache_tree.rb', line 20

def use(cache_link)
  @current_link = cache_link
end