Class: Preservation::Transfer::Pure

Inherits:
Ingest
  • Object
show all
Defined in:
lib/preservation/transfer/pure.rb

Overview

Transfer preparation for Pure

Instance Attribute Summary

Attributes inherited from Ingest

#logger

Instance Method Summary collapse

Constructor Details

#initialize(base_url: nil, username: nil, password: nil, basic_auth: nil) ⇒ Pure

Returns a new instance of Pure.

Parameters:

  • base_url (String) (defaults to: nil)
  • username (String) (defaults to: nil)
  • password (String) (defaults to: nil)
  • basic_auth (Boolean) (defaults to: nil) 


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# File 'lib/preservation/transfer/pure.rb', line 15

def initialize(base_url: nil, username: nil, password: nil, basic_auth: nil)
  super()
  @base_url = base_url
  @basic_auth = basic_auth
  if basic_auth === true
    @username = username
    @password = password
  end
end

Instance Method Details

#prepare_dataset(uuid: nil, dir_scheme: :uuid, delay: 0) ⇒ Object

For given uuid, if necessary, fetch the metadata, prepare a directory in the ingest path and populate it with the files and JSON description file.

Parameters:

  • uuid (String) (defaults to: nil) —

    uuid to preserve

  • dir_scheme (Symbol) (defaults to: :uuid) —

    how to make directory name

  • delay (Integer) (defaults to: 0) —

    days to wait (after modification date) before preserving



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# File 'lib/preservation/transfer/pure.rb', line 32

def prepare_dataset(uuid: nil,
                    dir_scheme: :uuid,
                    delay: 0)
  if uuid.nil?
    @logger.error 'Missing ' + uuid
    exit
  end
  dir_base_path = Preservation.ingest_path

  dataset = Puree::Dataset.new base_url: @base_url,
                               username: @username,
                               password: @password,
                               basic_auth: @basic_auth

  dataset.find uuid: uuid
  d = dataset.metadata
  if d.empty?
    @logger.error 'No metadata for ' + uuid
    exit
  end
  # configurable to become more human-readable
  dir_name = Preservation::Builder.build_directory_name(d, dir_scheme)

  # continue only if dir_name is not empty (e.g. because there was no DOI)
  # continue only if there is no DB entry
  # continue only if the dataset has a DOI
  # continue only if there are files for this resource
  # continue only if it is time to preserve
  if !dir_name.nil? &&
     !dir_name.empty? &&
     !Preservation::Report::Transfer.in_db?(dir_name) &&
     !d['doi'].empty? &&
     !d['file'].empty? &&
     Preservation::Temporal.time_to_preserve?(d['modified'], delay)

    dir_file_path = dir_base_path + '/' + dir_name
    dir_metadata_path = dir_file_path + '/metadata/'
    metadata_filename = dir_metadata_path + 'metadata.json'

    # calculate total size of data files
    download_storage_required = 0
    d['file'].each { |i| download_storage_required += i['size'].to_i }

    # do we have enough space in filesystem to fetch data files?
    if Preservation::Storage.enough_storage_for_download? download_storage_required
      # @logger.info 'Sufficient disk space for ' + dir_file_path
    else
      @logger.error 'Insufficient disk space to store files fetched from Pure. Skipping ' + dir_file_path
    end

    # has metadata file been created? if so, files and metadata are in place
    # continue only if files not present in ingest location
    if !File.size? metadata_filename

      @logger.info 'Preparing ' + dir_name + ', Pure UUID ' + d['uuid']

      data = []
      d['file'].each do |f|
        o = package_dataset_metadata d, f
        data << o
        wget_str = Preservation::Builder.build_wget @username,
                                                    @password,
                                                    f['url']

        Dir.mkdir(dir_file_path) if !Dir.exists?(dir_file_path)

        # fetch the file
        Dir.chdir(dir_file_path) do
          # puts 'Changing dir to ' + Dir.pwd
          # puts 'Size of ' + f['name'] + ' is ' + File.size(f['name']).to_s
          if File.size?(f['name'])
            # puts 'Should be deleting ' + f['name']
            File.delete(f['name'])
          end
          # puts f['name'] + ' missing or empty'
          # puts wget_str
          `#{wget_str}`
        end
      end

      Dir.mkdir(dir_metadata_path) if !Dir.exists?(dir_metadata_path)

      pretty = JSON.pretty_generate( data, :indent => '  ')
      # puts pretty
      File.write(metadata_filename,pretty)
      @logger.info 'Created ' + metadata_filename
    else
      @logger.info 'Skipping ' + dir_name + ', Pure UUID ' + d['uuid'] +
                   ' because ' + metadata_filename + ' exists'
    end
  else
    @logger.info 'Skipping ' + dir_name + ', Pure UUID ' + d['uuid']
  end
end