springboot-rest-web-hystrix

spring boot apps to demonstrate the working of netfilx-hystrix fault tolerance.

rest-producer is a producer microservice with the endpoint:
http://localhost:9090/greeting/{username}
It returns a string : Hello {username}!

rest-consumer is a consumer microservice which calls the above microservice endpoint by calling:
http://localhost:9000/get-greeting/{username}

rest-consumer has Hystrix fault tolerance enabled in case rest-producer server is not up/not able to serve request.

rest-consumer main class:

@SpringBootApplication
@EnableHystrix
@EnableHystrixDashboard
public class RestConsumerApplication {

   public static void main(String[] args) {
   	SpringApplication.run(RestConsumerApplication.class, args);
   }

}

rest-consumer service method:

	 @HystrixCommand(fallbackMethod = "defaultGreeting")
	  public String getGreeting(String username) {
		 	return	restTemplate().getForObject("http://localhost:9090/greeting/{username}", 
	          String.class, username);
	 }

rest-consumer fallback method:

@SuppressWarnings("unused")
  	private String defaultGreeting(String username) {
          return "Hello Guest!";
      }