Springboot 2响应式编程 WebFlux 初体验
Spring boot 应用可以添加依赖spring-boot-starter-webflux
来构建响应式 Web 应用程序。
内置响应式服务器
Spring Boot WebFlux 内置 Reactor Netty、Tomcat、Jetty 和 Undertow。默认端口是 8080。
WebFlux 的 CRUD 示例
Springboot WebFlux 将路由配置与请求的实际处理流程分开,如下示例。
@Configuration
public class UserFluxController {
@Bean
public RouterFunction<ServerResponse> monoRouterFunction(UserFluxController userHandler) {
return RouterFunctions
.route(GET("/flux/list").and(accept(APPLICATION_JSON)), userHandler::findAll)
.andRoute(GET("/flux/{id}").and(accept(APPLICATION_JSON)), userHandler::findOne)
.andRoute(POST("/flux").and(accept(APPLICATION_JSON)), userHandler::save)
.andRoute(PUT("/flux/{id}").and(accept(APPLICATION_JSON)), userHandler::update)
.andRoute(DELETE("/flux/{id}").and(accept(APPLICATION_JSON)), userHandler::delete);
}
private UserService service;
@Autowired
public UserFluxController(UserService service) {
this.service = service;
}
/**
* 查找列表. 成功返回200.
*/
Mono<ServerResponse> findAll(ServerRequest request) {
Object currentPage = request.attribute("currentPage").orElse(1);
Object pageSize = request.attribute("pageSize").orElse(10);
Page page = new Page((Integer) currentPage, (Integer) pageSize);
return ok().body(fromObject(service.findAll(page)));
}
/**
* 查找详情. 成功返回200.
*/
Mono<ServerResponse> findOne(ServerRequest request) {
return ok().body(fromObject(service.findOne(request.pathVariable("id"))));
}
/**
* 新建. 成功返回201.
*/
Mono<ServerResponse> save(ServerRequest request) {
return request.bodyToMono(UserVo.class).flatMap(user -> created(URI.create("")).body(fromObject(service.save(user))));
}
/**
* 更新. 成功返回201.
*/
Mono<ServerResponse> update(ServerRequest request) {
String id = request.pathVariable("id");
return request.bodyToMono(UserVo.class).flatMap(user -> {
user.setId(id);
return created(URI.create("")).body(fromObject(service.update(user)));
});
}
/**
* 删除. 成功返回204.
*/
Mono<ServerResponse> delete(ServerRequest request) {
service.delete(request.pathVariable("id"));
return noContent().build();
}
}