Spring WebFlux: Configure & Use Guide

1 year ago
Liam
2 minutes

WebFlux is an asynchronous non-blocking reactive programming framework used to build web applications based on reactive programming. Here are the configuration and usage methods for WebFlux:

  1. Dependency configuration: First, add WebFlux dependency in Maven or Gradle.
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-webflux</artifactId>
</dependency>
  1. A class that is used to create RESTful web services.
  2. retrieveMapping
  3. Creating a new entry using the POST method
@RestController
public class HelloController {
    
    @GetMapping("/hello")
    public Mono<String> sayHello() {
        return Mono.just("Hello, WebFlux!");
    }
}
  1. Configure routing: use RouterFunction to configure routes and map requests to corresponding handler methods.
@Configuration
public class RouterConfig {

    @Bean
    public RouterFunction<ServerResponse> route(HelloHandler helloHandler) {
        return RouterFunctions.route(RequestPredicates.GET("/hello"), helloHandler::sayHello);
    }
}
  1. Write a Handler: Create a Handler class that implements a method to process requests.
@Component
public class HelloHandler {

    public Mono<ServerResponse> sayHello(ServerRequest request) {
        return ServerResponse.ok().body(BodyInserters.fromValue("Hello, WebFlux!"));
    }
}
  1. This is an annotation for a Spring Boot application.
@SpringBootApplication
public class WebfluxApplication {

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

By following the above configuration and usage methods, you can start building reactive web applications using WebFlux. You can use Mono and Flux classes to handle asynchronous streaming data, improving the performance and resource utilization of your application.

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