within_new_transaction

# File activerecord/lib/active_record/connection_adapters/abstract/transaction.rb, line 235
      def within_new_transaction(options = {})
        @connection.lock.synchronize do
          begin
            transaction = begin_transaction options
            yield
          rescue Exception => error
            if transaction
              rollback_transaction
              after_failure_actions(transaction, error)
            end
            raise
          ensure
            unless error
              if Thread.current.status == "aborting"
                rollback_transaction if transaction
              else
                begin
                  commit_transaction if transaction
                rescue Exception
                  rollback_transaction(transaction) unless transaction.state.completed?
                  raise
                end
              end
            end
          end
        end
      end