136 lines
3.6 KiB
Ruby
136 lines
3.6 KiB
Ruby
|
# frozen_string_literal: true
|
||
|
# rubocop:disable Metrics/LineLength
|
||
|
# rubocop:disable Style/Documentation
|
||
|
|
||
|
module ObjectStorage
|
||
|
class MigrateUploadsWorker
|
||
|
include ApplicationWorker
|
||
|
include ObjectStorageQueue
|
||
|
|
||
|
SanityCheckError = Class.new(StandardError)
|
||
|
|
||
|
class MigrationResult
|
||
|
attr_reader :upload
|
||
|
attr_accessor :error
|
||
|
|
||
|
def initialize(upload, error = nil)
|
||
|
@upload, @error = upload, error
|
||
|
end
|
||
|
|
||
|
def success?
|
||
|
error.nil?
|
||
|
end
|
||
|
|
||
|
def to_s
|
||
|
success? ? "Migration successful." : "Error while migrating #{upload.id}: #{error.message}"
|
||
|
end
|
||
|
end
|
||
|
|
||
|
module Report
|
||
|
class MigrationFailures < StandardError
|
||
|
attr_reader :errors
|
||
|
|
||
|
def initialize(errors)
|
||
|
@errors = errors
|
||
|
end
|
||
|
|
||
|
def message
|
||
|
errors.map(&:message).join("\n")
|
||
|
end
|
||
|
end
|
||
|
|
||
|
def report!(results)
|
||
|
success, failures = results.partition(&:success?)
|
||
|
|
||
|
Rails.logger.info header(success, failures)
|
||
|
Rails.logger.warn failures(failures)
|
||
|
|
||
|
raise MigrationFailures.new(failures.map(&:error)) if failures.any?
|
||
|
end
|
||
|
|
||
|
def header(success, failures)
|
||
|
"Migrated #{success.count}/#{success.count + failures.count} files."
|
||
|
end
|
||
|
|
||
|
def failures(failures)
|
||
|
failures.map { |f| "\t#{f}" }.join('\n')
|
||
|
end
|
||
|
end
|
||
|
|
||
|
include Report
|
||
|
|
||
|
def self.enqueue!(uploads, model_class, mounted_as, to_store)
|
||
|
sanity_check!(uploads, model_class, mounted_as)
|
||
|
|
||
|
perform_async(uploads.ids, model_class.to_s, mounted_as, to_store)
|
||
|
end
|
||
|
|
||
|
# We need to be sure all the uploads are for the same uploader and model type
|
||
|
# and that the mount point exists if provided.
|
||
|
#
|
||
|
def self.sanity_check!(uploads, model_class, mounted_as)
|
||
|
upload = uploads.first
|
||
|
uploader_class = upload.uploader.constantize
|
||
|
uploader_types = uploads.map(&:uploader).uniq
|
||
|
model_types = uploads.map(&:model_type).uniq
|
||
|
model_has_mount = mounted_as.nil? || model_class.uploaders[mounted_as] == uploader_class
|
||
|
|
||
|
raise(SanityCheckError, "Multiple uploaders found: #{uploader_types}") unless uploader_types.count == 1
|
||
|
raise(SanityCheckError, "Multiple model types found: #{model_types}") unless model_types.count == 1
|
||
|
raise(SanityCheckError, "Mount point #{mounted_as} not found in #{model_class}.") unless model_has_mount
|
||
|
end
|
||
|
|
||
|
def perform(*args)
|
||
|
args_check!(args)
|
||
|
|
||
|
(ids, model_type, mounted_as, to_store) = args
|
||
|
|
||
|
@model_class = model_type.constantize
|
||
|
@mounted_as = mounted_as&.to_sym
|
||
|
@to_store = to_store
|
||
|
|
||
|
uploads = Upload.preload(:model).where(id: ids)
|
||
|
|
||
|
sanity_check!(uploads)
|
||
|
results = migrate(uploads)
|
||
|
|
||
|
report!(results)
|
||
|
rescue SanityCheckError => e
|
||
|
# do not retry: the job is insane
|
||
|
Rails.logger.warn "#{self.class}: Sanity check error (#{e.message})"
|
||
|
end
|
||
|
|
||
|
def sanity_check!(uploads)
|
||
|
self.class.sanity_check!(uploads, @model_class, @mounted_as)
|
||
|
end
|
||
|
|
||
|
def args_check!(args)
|
||
|
return if args.count == 4
|
||
|
|
||
|
case args.count
|
||
|
when 3 then raise SanityCheckError, "Job is missing the `model_type` argument."
|
||
|
else
|
||
|
raise SanityCheckError, "Job has wrong arguments format."
|
||
|
end
|
||
|
end
|
||
|
|
||
|
def build_uploaders(uploads)
|
||
|
uploads.map { |upload| upload.build_uploader(@mounted_as) }
|
||
|
end
|
||
|
|
||
|
def migrate(uploads)
|
||
|
build_uploaders(uploads).map(&method(:process_uploader))
|
||
|
end
|
||
|
|
||
|
def process_uploader(uploader)
|
||
|
MigrationResult.new(uploader.upload).tap do |result|
|
||
|
begin
|
||
|
uploader.migrate!(@to_store)
|
||
|
rescue => e
|
||
|
result.error = e
|
||
|
end
|
||
|
end
|
||
|
end
|
||
|
end
|
||
|
end
|