This project provides Netflix OSS integrations for Spring Boot apps through autoconfiguration and binding to the Spring Environment and other Spring programming model idioms. With a few simple annotations you can quickly enable and configure the common patterns inside your application and build large distributed systems with battle-tested Netflix components. The patterns provided include Service Discovery (Eureka), Circuit Breaker (Hystrix), Intelligent Routing (Zuul) and Client Side Load Balancing (Ribbon).
Service Discovery: Eureka Clients
Example eureka client:
@Configuration
@ComponentScan
@EnableAutoConfiguration
@EnableEurekaClient
@RestController
public class Application {
@RequestMapping("/")
public String home() {
return "Hello world";
}
public static void main(String[] args) {
new SpringApplicationBuilder(Application.class).web(true).run(args);
}
}(i.e. utterly normal Spring Boot app). Configuration is required to locate the Eureka server. Example:
eureka:
client:
serviceUrl:
defaultZone: http://localhost:8080/v2/
default.defaultZone: http://localhost:8080/v2/The default application name, virtual host and non-secure port are taken from the Environment is
${spring.application.name}, ${spring.application.name}.mydomain.net and ${server.port} respectively.
Service Discovery: Eureka Server
Example eureka server:
@Configuration
@EnableAutoConfiguration
@EnableEurekaServer
public class Application {
public static void main(String[] args) {
new SpringApplicationBuilder(Application.class).web(true).run(args);
}
}The server has a home page with a UI, and HTTP API endpoints per the
normal Eureka functionality under /v2/*.
Eureka (apache → tomcat) see flux capacitor and google group discussion.