Module: Cul::Hydra::Indexer

Defined in:
lib/cul_hydra/indexer.rb

Constant Summary collapse

NUM_FEDORA_RETRY_ATTEMPTS = 
3
DELAY_BETWEEN_FEDORA_RETRY_ATTEMPTS = 
5.seconds

Class Method Summary collapse

Class Method Details

.descend_from(pid, pids_to_omit = nil, verbose_output = false) ⇒ Object 



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# File 'lib/cul_hydra/indexer.rb', line 6

def self.descend_from(pid, pids_to_omit=nil, verbose_output=false)
  if pid.blank?
    raise 'Please supply a pid (e.g. rake recursively_index_fedora_objects pid=ldpd:123)'
  end

  begin

    unless ActiveFedora::Base.exists?(pid)
      raise 'Could not find Fedora object with pid: ' + pid
    end

    if pids_to_omit.present? && pids_to_omit.include?(pid)
      puts 'Skipping topmost object in this set (' + pid + ') because it has been intentionally omitted...' if verbose_output
    else
      puts 'Indexing topmost object in this set (' + pid + ')...' if verbose_output
      puts 'If this is a BagAggregator with a lot of members, this may take a while...' if verbose_output

      yield pid

    end

    puts 'Recursively retreieving and indexing all members of ' + pid + '...'

    unique_pids = Cul::Hydra::RisearchMembers.get_recursive_member_pids(pid, true)

    total_number_of_members = unique_pids.length
    puts 'Recursive search found ' + total_number_of_members.to_s + ' members.' if verbose_output

    if pids_to_omit.present?
      unique_pids = unique_pids - pids_to_omit
      total_number_of_members = unique_pids.length
      puts 'After checking against the list of omitted pids, the total number of objects to index will be: ' + total_number_of_members.to_s if verbose_output
    end

    i = 1
    if total_number_of_members > 0
      unique_pids.each {|pid|

        puts 'Recursing on ' + i.to_s + ' of ' + total_number_of_members.to_s + ' members (' + pid + ')...' if verbose_output

        yield pid

        i += 1
      }
    end

  rescue RestClient::Unauthorized => e
    error_message = "Skipping #{pid} due to error: " + e.message + '.  Problem with Fedora object?'
    puts error_message
    logger.error error_message if defined?(logger)
  end

  puts 'Recursion complete!'

end

.index_pid(pid, skip_generic_resources = false, verbose_output = false) ⇒ Object 



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# File 'lib/cul_hydra/indexer.rb', line 69

def self.index_pid(pid, skip_generic_resources=false, verbose_output=false)
  # We found an object with the desired PID. Let's reindex it
  begin
    active_fedora_object = nil

    NUM_FEDORA_RETRY_ATTEMPTS.times { |i|
      begin
        active_fedora_object = ActiveFedora::Base.find(pid, :cast => true)
        break
      rescue RestClient::RequestTimeout, Errno::EHOSTUNREACH => e
        remaining_attempts = (NUM_FEDORA_RETRY_ATTEMPTS-1) - i
        if remaining_attempts == 0
          raise e
        else
          Rails.logger.error "Error: Could not connect to fedora. (#{e.class.to_s + ': ' + e.message}).  Will retry #{remaining_attempts} more #{remaining_attempts == 1 ? 'time' : 'times'} (after a #{DELAY_BETWEEN_FEDORA_RETRY_ATTEMPTS} second delay)."
          sleep DELAY_BETWEEN_FEDORA_RETRY_ATTEMPTS
        end
      end
    }

    if skip_generic_resources && active_fedora_object.is_a?(GenericResource)
      puts 'Object was skipped because GenericResources are being skipped and it is a GenericResource.'
    else
      active_fedora_object.update_index
      puts 'done.' if verbose_output
    end
  rescue SystemExit, Interrupt => e
    # Allow system interrupt (ctrl+c)
    raise e
  rescue Exception => e
    puts "Encountered problem with #{pid}.  Skipping record.  Exception: #{e.message}"
  end
end

.recursively_index_fedora_objects(top_pid, pids_to_omit = nil, skip_generic_resources = false, verbose_output = false) ⇒ Object 



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# File 'lib/cul_hydra/indexer.rb', line 61

def self.recursively_index_fedora_objects(top_pid, pids_to_omit=nil, skip_generic_resources=false, verbose_output=false)

  descend_from(top_pid, pids_to_omit, verbose_output) do |pid|
    self.index_pid(pid, skip_generic_resources, verbose_output)
  end

end