Class: Rubydora::Transaction

Inherits:
Object
  • Object
show all
Defined in:
lib/rubydora/transactions.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(repository, &block) ⇒ Transaction

Returns a new instance of Transaction.



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# File 'lib/rubydora/transactions.rb', line 88

def initialize repository, &block
  @repository = repository
  with_transactions(&block)
end

Instance Attribute Details

#repository ⇒ Object (readonly)

Returns the value of attribute repository.



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# File 'lib/rubydora/transactions.rb', line 87

def repository
  @repository
end

Instance Method Details

#rollback ⇒ Object

Roll-back transactions by reversing their outcomes (or, in some cases, re-ingesting the object at the previous state.



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# File 'lib/rubydora/transactions.rb', line 114

def rollback
  without_transactions do
  repository.transactions_log.delete_if do |(method, options)|

    begin
      case method
        when :ingest
          repository.purge_object :pid => options[:pid]

        when :modify_object
          repository.modify_object options

        when :add_datastream
          repository.purge_datastream :pid => options[:pid], :dsid => options[:dsid]

        when :add_relationship
          repository.purge_relationship options[:options].merge(:pid => options[:pid])

        when :purge_relationship
          repository.add_relationship options[:options].merge(:pid => options[:pid])

        when :purge_object
          repository.ingest :pid => options[:pid], :file => options[:foxml]

        when :set_datastream_options
          repository.set_datastream_options options

        when :modify_datastream
          repository.purge_object :pid => options[:pid] rescue nil
          repository.ingest :pid => options[:pid], :file => options[:foxml]

        when :purge_datastream
          repository.purge_object :pid => options[:pid] rescue nil
          repository.ingest :pid => options[:pid], :file => options[:foxml]
      end
    rescue
      # no-op
    end

  end
  end
  true
end

#with_transactions {|_self| ... } ⇒ Object

Yields:

  • (_self)

Yield Parameters:



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# File 'lib/rubydora/transactions.rb', line 93

def with_transactions &block
  old_state = Rubydora::Transactions.use_transactions
  Rubydora::Transactions.use_transactions = true

  yield(self)

  Rubydora::Transactions.use_transactions = old_state
end

#without_transactions {|_self| ... } ⇒ Object

Yields:

  • (_self)

Yield Parameters:



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# File 'lib/rubydora/transactions.rb', line 102

def without_transactions &block
  old_state = Rubydora::Transactions.use_transactions
  Rubydora::Transactions.use_transactions = false

  yield(self)

  Rubydora::Transactions.use_transactions = old_state
end