Spring Web MVC support for Dubbo Service Provider

[mercyblitz]

Adding support for Dubbo's Service Provider in Spring Web MVC application without any @Controller.

Service Provider demo code :

@Service(
        version = "${demo.service.version}",
        application = "${dubbo.application.id}",
        protocol = "${dubbo.protocol.id}",
        registry = "${dubbo.registry.id}"
)
@RestService
public class DefaultDemoService implements DemoService {

    @RequestMapping("/say-hello")
    public String sayHello(String name) {
        return "Hello, " + name + " (from Spring Boot)";
    }

}

@RestService that is a meta-annotation declares current Dubbo's service exporting HTTP REST under Spring WebMVC, and it's required enabled by @EnableRestService in your @Configuration class , as follow:

@EnableRestService
public class WebMvcConfiguration {
}