Spring Cloud provides its own client-side load-balancer abstraction and implementation. For the load-balancing mechanism, ReactiveLoadBalancer interface has been added and a Round-Robin-based implementation has been provided for it. In order to get instances to select from reactive ServiceInstanceListSupplier is used. Currently we support a service-discovery-based implementation of ServiceInstanceListSupplier that retrieves available instances from Service Discovery using a Discovery Client available in the classpath.