Class: Nestene::DiskStorage

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

Instance Method Summary collapse

Constructor Details

#initialize(dir) ⇒ DiskStorage

Returns a new instance of DiskStorage.



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# File 'lib/nestene/storage.rb', line 20

def initialize(dir)
  @dir=dir
  @converter = FileNameConverter.new
end

Instance Method Details

#delete(key) ⇒ Object 



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# File 'lib/nestene/storage.rb', line 56

def delete(key)
  file_name = "%s/%s" % [@dir,@converter.key_to_file_name(key)]
  File.unlink(file_name)
end

#list ⇒ Object 



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# File 'lib/nestene/storage.rb', line 25

def list
  entries = Dir.entries(@dir)
  entries.delete('.')
  entries.delete('..')
  entries.map!{|fn| @converter.file_name_to_key(fn)}
  entries.delete('__credentials__')
  entries
end

#load(key) ⇒ Object 



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# File 'lib/nestene/storage.rb', line 47

def load(key)
  file_name = "%s/%s" % [@dir,@converter.key_to_file_name(key)]
  if File.exist?(file_name)
    File.open(file_name,"r"){|f| JSON.parse(f.read)}
  else
    nil
  end
end

#store(key, value) ⇒ Object 



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# File 'lib/nestene/storage.rb', line 34

def store(key, value)
  if value != nil
    final_name = "%s/%s" % [@dir,@converter.key_to_file_name(key)]
    tmp_name = "%s.temp" % final_name
    File.open(tmp_name,"w") do |f|
      f.write(JSON.pretty_generate(value))
    end
    File.rename(tmp_name, final_name)
  else
    delete(key)
  end
end