我正在使用 Spring 的 WebClient。 REST 端点的主要实现（在 DemoPOJORouter 和 DemoPOJOHandler 中）似乎可以工作。此外，DemoClientRouter和DemoClientHandler中的http.Get端点似乎可以工作。
但是，DemoClient 实现的 http.Post “什么也不做”。它返回成功（200），但没有任何内容添加到虚拟存储库中。我有一种感觉，我需要在 DemoClient 中做一些事情来导致 DemoPOJOHandler 中的 http.Post 端点实际执行（即，我不相信 DemoPOJOService.add() 中的语句也不相信 DemoPOJORepo.add( ) 正在执行).
基于之前在 WebFlux/反应式/功能性工作中的失误，我有一种感觉，我没有成功订阅，因此永远不会调用这些语句。但是，我很难确定“为什么”。
测试代码如下...
DemoClient 路由器...
@Configuration
public class DemoClientRouter {
@Bean
public RouterFunction<ServerResponse> clientRoutes(DemoClientHandler requestHandler) {
return nest(path("/v2"),
nest(accept(APPLICATION_JSON),
RouterFunctions.route(RequestPredicates.GET("/DemoClient/{id}"), requestHandler::getById)
.andRoute(RequestPredicates.POST("/DemoClient"), requestHandler::add)));
}
}
DemoClient 处理程序...
@Component
public class DemoClientHandler {
public static final String PATH_VAR_ID = "id";
@Autowired
DemoClient demoClient;
public Mono<ServerResponse> getById(ServerRequest request) {
Mono<DemoPOJO> monoDemoPOJO;
int id;
// short-circuit if bad request or invalid value for id
id = getIdFromServerRequest(request);
if (id < 1) {
return ServerResponse.badRequest().build();
}
// non-blocking mechanism for either returning the Mono<DemoPOJO>
// or an empty response if Mono<Void> was returned by repo.getById()
return demoClient.getById(id).flatMap(demoPOJO -> ServerResponse.ok()
.contentType(MediaType.APPLICATION_JSON)
.body(Mono.just(demoPOJO), DemoPOJO.class))
.switchIfEmpty(ServerResponse.notFound().build());
}
public Mono<ServerResponse> add(ServerRequest request) {
return request.bodyToMono(DemoPOJO.class).doOnSuccess( demoPOJO -> demoClient.add(demoPOJO))
.then(ServerResponse.ok().build())
.onErrorResume(e -> simpleErrorReporter(e))
.switchIfEmpty(ServerResponse.badRequest().build());
}
private int getIdFromServerRequest(ServerRequest request) {
Map<String, String> pathVariables = request.pathVariables();
int id = -1;
// short-circuit if bad request
// should never happen, but if this method is ever called directly (vice via DemoPOJORouter)
if ((pathVariables == null)
|| (!pathVariables.containsKey(PATH_VAR_ID))) {
return id;
}
try {
id = Integer.parseInt(pathVariables.get(PATH_VAR_ID));
} catch (NumberFormatException e) {
// swallow the error, return value <0 to signal error
id = -1;
}
return id;
}
private Mono<ServerResponse> simpleErrorReporter(Throwable e) {
return ServerResponse.badRequest()
.contentType(MediaType.TEXT_PLAIN)
.syncBody(e.getMessage());
}
}
DemoClient 实现...
@Component
public class DemoClient {
private final WebClient client;
public DemoClient() {
client = WebClient.create();
}
public Mono<DemoPOJO> getById(int id) {
return client.get().uri("http://localhost:8080/v2/DemoPOJO/" + id)
.accept(MediaType.APPLICATION_JSON)
.exchange()
.flatMap(response -> response.bodyToMono(DemoPOJO.class));
}
public Mono<Boolean> add(DemoPOJO demoPOJO) {
return client.post().uri("http://localhost:8080/v2/DemoPOJO")
.syncBody(demoPOJO)
.exchange()
.flatMap(response -> response.bodyToMono(Boolean.class));
}
}
还有 DemoPOJO 的东西，从 DemoPOJORouter...
开始@Configuration
public class DemoPOJORouter {
@Bean
public RouterFunction<ServerResponse> demoPOJORoute(DemoPOJOHandler requestHandler) {
return nest(path("/v2"),
nest(accept(APPLICATION_JSON),
RouterFunctions.route(RequestPredicates.GET("/DemoPOJO/{id}"), requestHandler::getById)
.andRoute(RequestPredicates.POST("/DemoPOJO"), requestHandler::add)));
}
}
演示POJOHandler...
@Component
public class DemoPOJOHandler {
public static final String PATH_VAR_ID = "id";
@Autowired
private DemoPOJOService service;
public Mono<ServerResponse> getById(ServerRequest request) {
Mono<DemoPOJO> monoDemoPOJO;
int id;
// short-circuit if bad request or invalid value for id
id = getIdFromServerRequest(request);
if (id < 1) {
return ServerResponse.badRequest().build();
}
// non-blocking mechanism for either returning the Mono<DemoPOJO>
// or an empty response if Mono<Void> was returned by repo.getById()
return service.getById(id).flatMap(demoPOJO -> ServerResponse.ok()
.contentType(MediaType.APPLICATION_JSON)
.body(Mono.just(demoPOJO), DemoPOJO.class))
.switchIfEmpty(ServerResponse.notFound().build());
}
public Mono<ServerResponse> add(ServerRequest request) {
return request.bodyToMono(DemoPOJO.class).doOnSuccess( demoPOJO -> service.add(demoPOJO))
.then(ServerResponse.ok().build())
.onErrorResume(e -> simpleErrorReporter(e))
.switchIfEmpty(ServerResponse.badRequest().build());
}
private int getIdFromServerRequest(ServerRequest request) {
Map<String, String> pathVariables = request.pathVariables();
int id = -1;
// short-circuit if bad request
// should never happen, but if this method is ever called directly (vice via DemoPOJORouter)
if ((pathVariables == null)
|| (!pathVariables.containsKey(PATH_VAR_ID))) {
return id;
}
try {
id = Integer.parseInt(pathVariables.get(PATH_VAR_ID));
} catch (NumberFormatException e) {
// swallow the exception, return illegal value to signal error
id = -1;
}
return id;
}
private Mono<ServerResponse> simpleErrorReporter(Throwable e) {
return ServerResponse.badRequest()
.contentType(MediaType.TEXT_PLAIN)
.syncBody(e.getMessage());
}
}
演示POJOService...
@Component
public class DemoPOJOService {
@Autowired
private DemoPOJORepo demoPOJORepo;
public Mono<DemoPOJO> getById(int id) {
DemoPOJO demoPOJO = demoPOJORepo.getById(id);
return (demoPOJO == null) ? Mono.empty()
: Mono.just(demoPOJO);
}
public Mono<Boolean> add(DemoPOJO demoPOJO) {
return Mono.just(demoPOJORepo.add(demoPOJO));
}
}
演示POJORepo...
@Component
public class DemoPOJORepo {
private static final int NUM_OBJS = 5;
private static DemoPOJORepo demoRepo = null;
private Map<Integer, DemoPOJO> demoPOJOMap;
private DemoPOJORepo() {
initMap();
}
public static DemoPOJORepo getInstance() {
if (demoRepo == null) {
demoRepo = new DemoPOJORepo();
}
return demoRepo;
}
public DemoPOJO getById(int id) {
return demoPOJOMap.get(id);
}
public boolean add(DemoPOJO demoPOJO) throws InvalidParameterException {
// short-circuit on null pointer or duplicate id
if (demoPOJO == null) {
throw new InvalidParameterException("Add failed, null object detected...");
} else if (demoPOJOMap.containsKey(demoPOJO.getId())) {
throw new InvalidParameterException("Add failed, duplicate id detected...");
}
demoPOJOMap.put(demoPOJO.getId(), demoPOJO);
// if the return statement is reached, then the new demoPOJO was added
return true;
}
}
最后，演示POJO...
public class DemoPOJO {
public static final String DEF_NAME = "DEFAULT NAME";
public static final int DEF_VALUE = 99;
private int id;
private String name;
private int value;
public DemoPOJO(int id) {
this(id, DEF_NAME, DEF_VALUE);
}
public DemoPOJO(@JsonProperty("id") int id, @JsonProperty("name") String name, @JsonProperty("value") int value) {
this.id = id;
this.name = name;
this.value = value;
}
/*
* setters and getters go here
*/
public String toString() {
StringBuilder builder = new StringBuilder();
builder.append(id);
builder.append(" :: ");
builder.append(name);
builder.append(" :: ");
builder.append(value);
return builder.toString();
}
}
这可能是您的问题。
演示POJOHandler.class
request.bodyToMono(DemoPOJO.class).doOnSuccess(demoPOJO -> service.add(demoPOJO))
演示POJOService.class
public Mono<Boolean> add(DemoPOJO demoPOJO) {
return Mono.just(demoPOJORepo.add(demoPOJO));
}
doOnSuccessVoidMonodemoPOJORepo#addMonopublic void add(DemoPOJO demoPOJO) {
demoPOJORepo.add(demoPOJO);
}