Synchronous communication with Spring Cloud

Spring Cloud provides a set of components to help you in implementing communication between microservices. The first of them is RestTemplate, which is always used for consuming RESTful web services by a client. It is included in a Spring Web project. To use it effectively in a microservices environment, it should be annotated with the @LoadBalanced qualifier. Thanks to that, it will be automatically configured to use Netflix Ribbon and it will be able to take an advantage of service discovery by using service names instead of IP addresses. Ribbon is a client-side load balancer, which provides a simple interface allowing control over the behavior of HTTP and TCP clients. It can be easily integrated with other Spring Cloud components, such as service discovery or circuit breaker, and, furthermore, it is fully transparent to a developer. The next available component is Feign, a declarative REST client also from the Netflix OSS stack. Feign already...