Class: Aspera::PersistencyFolder

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

Overview

Persist data on file system

Instance Method Summary collapse

Constructor Details

#initialize(folder) ⇒ PersistencyFolder

Returns a new instance of PersistencyFolder.



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# File 'lib/aspera/persistency_folder.rb', line 15

def initialize(folder)
  @cache = {}
  @folder = folder
  Log.log.debug{"persistency folder: #{@folder}"}
end

Instance Method Details

#delete(object_id) ⇒ Object 



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# File 'lib/aspera/persistency_folder.rb', line 47

def delete(object_id)
  persist_filepath = id_to_filepath(object_id)
  Log.log.debug{"persistency deleting: #{persist_filepath}"}
  FileUtils.rm_f(persist_filepath)
  @cache.delete(object_id)
end

#garbage_collect(persist_category, max_age_seconds = nil) ⇒ Object 



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# File 'lib/aspera/persistency_folder.rb', line 54

def garbage_collect(persist_category, max_age_seconds=nil)
  garbage_files = Dir[File.join(@folder, persist_category + '*' + FILE_SUFFIX)]
  if !max_age_seconds.nil?
    current_time = Time.now
    garbage_files.select! { |filepath| (current_time - File.stat(filepath).mtime).to_i > max_age_seconds}
  end
  garbage_files.each do |filepath|
    File.delete(filepath)
    Log.log.debug{"persistency deleted expired: #{filepath}"}
  end
  return garbage_files
end

#get(object_id) ⇒ Object

Returns String or nil string on existing persist, else nil.

Returns:

  • String or nil string on existing persist, else nil



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# File 'lib/aspera/persistency_folder.rb', line 22

def get(object_id)
  Log.log.debug{"persistency get: #{object_id}"}
  if @cache.key?(object_id)
    Log.log.debug('got from memory cache')
  else
    persist_filepath = id_to_filepath(object_id)
    Log.log.debug{"persistency = #{persist_filepath}"}
    if File.exist?(persist_filepath)
      Log.log.debug('got from file cache')
      @cache[object_id] = File.read(persist_filepath)
    end
  end
  return @cache[object_id]
end

#put(object_id, value) ⇒ Object 



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# File 'lib/aspera/persistency_folder.rb', line 37

def put(object_id, value)
  Aspera.assert_type(value, String)
  persist_filepath = id_to_filepath(object_id)
  Log.log.debug{"persistency saving: #{persist_filepath}"}
  FileUtils.rm_f(persist_filepath)
  File.write(persist_filepath, value)
  Environment.restrict_file_access(persist_filepath)
  @cache[object_id] = value
end