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# -*- encoding: utf-8 -*-
require 'json'
require 'digest/md5'
module Aliyun
module OSS
##
# Multipart upload/download structures
#
module Multipart
##
# A multipart transaction. Provide the basic checkpoint methods.
#
class Transaction < Common::Struct::Base
attrs :id, :object, :bucket, :creation_time, :options
def initialize(opts = {})
super(opts)
@mutex = Mutex.new
end
private
# Persist transaction states to file
def write_checkpoint(states, file)
md5= Util.get_content_md5(states.to_json)
@mutex.synchronize {
File.open(file, 'wb') {
|f| f.write(states.merge(md5: md5).to_json)
}
}
end
# Load transaction states from file
def load_checkpoint(file)
states = {}
@mutex.synchronize {
states = JSON.load(File.read(file))
}
states = Util.symbolize(states)
md5 = states.delete(:md5)
fail CheckpointBrokenError, "Missing MD5 in checkpoint." unless md5
unless md5 == Util.get_content_md5(states.to_json)
fail CheckpointBrokenError, "Unmatched checkpoint MD5."
end
states
end
def get_file_md5(file)
Digest::MD5.file(file).to_s
end
end # Transaction
##
# A part in a multipart uploading transaction
#
class Part < Common::Struct::Base
attrs :number, :etag, :size, :last_modified
end # Part
end # Multipart
end # OSS
end # Aliyun
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