expects Block from Compressor

def process_data(self, block):
        """expects Block from Compressor"""
        if hasattr(block, 'send_destinations') and block.send_destinations:
            self.fire(events.FileProcessed(block))
            self._log_in_db(block)
            if self._sent_log_file:
                self._log_in_sent_log(block)
            self.log.info("Sent to '%s' file '%s' containing files: %s",
                          str(block.send_destinations),
                          block.processed_data_file_info.basename,
                          str([file_info.path for file_info in block.content_file_infos]))
        else:
            self.log.info("File %s wasn't sent", block.processed_data_file_info.basename)
        return block