def setup_exchange(self):
logger.debug('<STR_LIT>', self._exchange)<EOL>self._channel.exchange_declare(self.on_exchange_declareok,<EOL>self._exchange,<EOL>self._exchange_type,<EOL>durable=True)<EOL>
Declare the exchange

        When completed, the on_exchange_declareok method will be invoked by pika.