Class: ArchiveStorage::Migrator

Inherits:
Object
  • Object
show all
Defined in:
lib/archive_storage/migrator.rb

Instance Method Summary collapse

Constructor Details

#initialize(planner: nil) ⇒ Migrator

Returns a new instance of Migrator.



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# File 'lib/archive_storage/migrator.rb', line 10

def initialize(planner: nil)
  @planner = planner
end

Instance Method Details

#cleanup_source!(file_record) ⇒ Object 



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# File 'lib/archive_storage/migrator.rb', line 94

def cleanup_source!(file_record)
  return false unless cleanup_ready?(file_record)

  source_storage = file_record.source_storage.to_sym
  ArchiveStorage.adapter(source_storage).delete(file_record_source_key(file_record))
  file_record.update!(source_deleted_at: Time.now, source_delete_pending: false)
  true
end

#enqueue_or_migrate!(inline: false) ⇒ Object 



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# File 'lib/archive_storage/migrator.rb', line 14

def enqueue_or_migrate!(inline: false)
  count = 0

  planner.each_candidate do |candidate|
    file_record = ArchiveStorage.registry.claim_candidate(candidate)
    next unless file_record

    if inline
      migrate_record!(file_record)
    else
      Enqueuer.new.enqueue_migration(file_record.id)
    end

    count += 1
  end

  count
end

#migrate_record!(file_record) ⇒ Object 



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# File 'lib/archive_storage/migrator.rb', line 33

def migrate_record!(file_record)
  file_record.with_lock do
    source_storage = (file_record.source_storage || file_record.current_storage).to_sym
    target_storage = file_record.target_storage.to_sym
    source_key = file_record_source_key(file_record)
    target_key = file_record_target_key(file_record)

    return file_record if source_storage == target_storage && file_record.verified_at

    file_record.update!(
      migration_started_at: Time.now,
      attempts: file_record.attempts.to_i + 1,
      last_error: nil
    )

    source = ArchiveStorage.adapter(source_storage)
    target = ArchiveStorage.adapter(target_storage)

    target.copy_from(source, source_key, target_key)
    verification = Verifier.new.verify!(
      source_adapter: source,
      target_adapter: target,
      source_key: source_key,
      target_key: target_key
    )
    target_metadata = verification.target_metadata

    file_record.update!(
      current_storage: target_storage.to_s,
      source_storage: source_storage.to_s,
      target_storage: target_storage.to_s,
      storage_key: target_key,
      byte_size: target_metadata.byte_size,
      content_type: target_metadata.content_type,
      checksum: target_metadata.checksum || target_metadata.etag,
      migrated_at: Time.now,
      verified_at: Time.now,
      source_delete_pending: source_storage != target_storage,
      last_error: nil
    )
  end

  file_record
rescue StandardError => error
  safe_update_error(file_record, error)
  raise
end

#verify_record!(file_record) ⇒ Object 



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# File 'lib/archive_storage/migrator.rb', line 81

def verify_record!(file_record)
  target_storage = (file_record.target_storage || file_record.current_storage).to_sym
  metadata = ArchiveStorage.adapter(target_storage).head(file_record.storage_key)

  file_record.update!(
    byte_size: metadata.byte_size,
    content_type: metadata.content_type,
    checksum: metadata.etag,
    verified_at: Time.now,
    last_error: nil
  )
end