LoadBalancer allows you to send operations to one of a number of endpoints (Members). Its main purpose is to determine the next Member if queried. It is up to your implementation to use different load balancing policies. You should implement the interface com.hazelcast.client.LoadBalancer for that purpose.
If the client is configured in smart mode, only the operations that are not key-based will be routed to the endpoint that is returned by the LoadBalancer. If the client is not a smart client, LoadBalancer will be ignored.
The following are example configurations.
Declarative:
<hazelcast-client>
...
<load-balancer type=“random”>
yourLoadBalancer
</load-balancer>
...
</hazelcast-client>
Programmatic:
ClientConfig clientConfig = new ClientConfig();
clientConfig.setLoadBalancer(yourLoadBalancer);