How to determine if an exchange exists?

[digitalsanctum]

What's the best way to determine if an exchange exists already on the broker?

There seems to be a exchangeDeclarePassive method on the Channel interface but I don't see it available via the RabbitAdmin implementation where the other related exchange methods are.

I'd like to do something like on start up:

if (exchangeExists)
do nothing
else
createExchange

My reason for doing this is that I want to recreate an exchange (if it doesn't already exist) after failover remediation which may include restarting the broker.

[Mark Fisher]

The declareExchange() method is idempotent actually. So, it should do what you've described out-of-the-box.