I want to use replicated-leveldb-store for MQTT

I trying to configure activemq(ActiveMQ 5.9.0) server for HA(High
Availability).
I found that replicated leveldb store(
http://activemq.apache.org/replicated-leveldb-store.html
<http://activemq.apache.org/replicated-leveldb-store.html> ).
So I tried to use above features for mqtt.
But I realized that mqtt client doesn't use url syntax like below.
*failover:(tcp://broker1:61616,tcp://broker2:61616,tcp://broker3:61616)*
The client library is https://github.com/fusesource/mqtt-client.

Is replicated-leveldb-store not for MQTT ?