I created a RestController which look like this :
@RestController
public class GreetingController {
@RequestMapping(value = "/greetings", method = RequestMethod.GET)
public Mono<Greeting> greeting(HttpServletRequest request) {
return Mono.just(new Greeting("Hello..." + request.toString()));
}
}
Unfortunately when I try to hit the "greetings" endpoint I get an exception :
java.lang.IllegalStateException: No resolver for argument [0] of type [org.apache.catalina.servlet4preview.http.HttpServletRequest]
I am using
compile('org.springframework.boot.experimental:spring-boot-starter-web-reactive')
How to fix this ?
Link to full stack-trace. Link to build.gradle
----------EDIT----------
Using the interface. Now getting :
java.lang.IllegalStateException: No resolver for argument [0] of type [javax.servlet.http.HttpServletRequest] on method (rest is same)
You should never use the Servlet API in a Spring Reactive Web application. This is not supported and this is making your app container-dependent, whereas Spring Web Reactive can work with non-Servlet runtimes such as Netty.
Instead you should use the HTTP API provided by Spring; here's your code sample with a few changes:
@RestController
public class GreetingController {
@GetMapping("/greetings")
public Mono<Greeting> greeting(ServerHttpRequest request) {
return Mono.just(new Greeting("Hello..." + request.getURI().toString()));
}
}
You can inject either ServerWebExchange or directly ServerHttpRequest / ServerHttpResponse.