Load balanced calls and RestTemplate implementation

Spring Cloud uses Netflix Ribbon, a client-side load balancer that plays a critical role and can handle both HTTP and TCP protocols. Ribbon is cloud-enabled and provides built-in failure resiliency. Ribbon also allows you to use multiple and pluggable load balancing rules. It integrates clients with load balancers.

Ribbon is integrated with the Eureka Server for client-side load balancing and with the Zuul server for server-side load balancing in Spring Cloud by default. This integration provides the following features:

• There is no need to hard code remote server URLs for discovery when Eureka Server is used. This is a prominent advantage, although you can still use the configured server list (listOfServers) in application.yml if required.
• The server list gets populated from Eureka Server. Eureka Server overrides ribbonServerList...