This tutorial provides the typical steps in migrating a Spring Web Flux Controller to avoid dependency on Spring. It also enables simpler code that can take advantage of all the OfficeFloor features.
The Spring Web Flux Controller to be migrated is taken from the previous tutorial:
@RestController
@RequestMapping("/rest")
public class SpringRestController {
@Autowired
private SpringDependency dependency;
@GetMapping
public Mono<ResponseModel> get() {
return Mono.just(new ResponseModel("GET " + this.dependency.getMessage()));
}
@GetMapping("/path/{param}")
public Mono<ResponseModel> path(@PathVariable String param) {
return Mono.just(new ResponseModel(param));
}
@PostMapping("/update")
public Flux<ResponseModel> post(@RequestBody RequestModel request) {
return Flux.just(new ResponseModel(request.getInput()), new ResponseModel("ANOTHER"));
}
}
To migrate a Spring Web Flux Controller:
1. Replace the Spring parameter annotations with WoOF annotations.
2. Provide Reactor OfficeFloor integration by adding following dependency (see Reactor tutorial for further details):
<dependency> <groupId>net.officefloor.reactor</groupId> <artifactId>officereactor</artifactId> </dependency>
3. Remove @ResponseBody and configure next procedure to send result as parameter via ObjectResponse:
public class SendResponse {
public void send(@Parameter ResponseModel payload, ObjectResponse<ResponseModel> response) {
response.send(payload);
}
}
4. Any @PostContruct / @PreDestroy moved to ManagedObjectSource as injected object.
5. See Transaction Tutorial for graphically configuring transactions (removing need for Spring's @Transactional).
6. Remove the remaining Spring annotations.
7. Move dependencies to parameters of the method.
The resulting migrated code is as follows:
public class MigratedRestController {
public Mono<ResponseModel> get(SpringDependency dependency) {
return Mono.just(new ResponseModel("GET " + dependency.getMessage()));
}
public Mono<ResponseModel> path(@HttpPathParameter("param") String param) {
return Mono.just(new ResponseModel(param));
}
public Mono<ResponseModel> post(RequestModel request) {
return Mono.just(new ResponseModel(request.getInput()));
}
}
The next tutorial covers migrating WAR application.