JMS consumer failover

I have a primary and a backup JMS provider/server (Tibco EMS). The backup is
running in standby mode and doesn't allow connections until the primary is
running fine.

I know that a Camel route can consume from multiple endpoints but how to do
it with failover? By failover I mean that it should consume from the primary
endpoint as long as the provider/connection is alive and connect to /
consume from the backup only when the primary goes down.

Thanks a lot for your help.
Dan