如何从@Async注释方法引发异常

Question

我有两个模块，一个从rest模板调用另一个。（管理员调用notifServer）notifServer有一个用Async注释的方法。我想在该方法中抛出一个异常，但管理员获取响应太快，并且无法在admin中捕获异常方法。

我是spring和@Async进程的新成员。我已经尝试将响应主体从NotifServer映射到C的CompletableFuture。类 。但我仍然没有得到错误响应。

此代码来自管理员

ResponseEntity response = fcmRestTemplate.exchange(nsUrl + "/fcm/admin/" + bulkFcmId, HttpMethod.POST,
                    HttpEntityUtils.getHttpEntity(moduleCode), CompletableFuture.class);
            if (response.getStatusCode() != HttpStatus.CREATED && response.getStatusCode() != HttpStatus.ACCEPTED) {
                String errorMessage = ErrorResourceUtil.getErrorMessage((HashMap) response.getBody(),"Unable to send fcm");
                setStatusToFailedByBulkFcmId(bulkFcmId);
                throw new ClientException(errorMessage);
            }

这是NotifServer提供的

JobExecution jobExecution = jobLauncher
                    .run(importJob, new JobParametersBuilder()
                    .addString("fullPathFileName", TMP_DIR)
                    .addString("batch_fcm_id", String.valueOf(id))
                    .addLong("time",System.currentTimeMillis())
                    .toJobParameters());
            if(jobExecution.getStepExecutions().stream().map(StepExecution::getStatus).findFirst().get().equals(BatchStatus.ABANDONED)){
             throw new ClientException("INVALID CSV");

这是用@Async注释的。

那么，有没有一种方法可以让我在管理中的响应主体中捕获客户端异常？

编辑这是notifServer的API

@ResponseStatus(HttpStatus.CREATED)
    @PostMapping(value = "/admin/{bulkFcmId}")
    public void pushFCMByAdmin(@PathVariable Long bulkFcmId) {
        fcmService.sendFcmByAdmin(bulkFcmId, AuthUtil.getCurrentUser());
    }

然后，sendFcmByAdmin具有@异步注释。

Answer 1

在下面的代码中，您可以将返回类型提供为业务对象而不是CompletableFuture.class.由于您将CompletableFuture.class作为参数传递给交换，因此它需要CompletableF类型的响应返回值uture.class.

ResponseEntity response = fcmRestTemplate.exchange(nsUrl + "/fcm/admin/" + bulkFcmId, HttpMethod.POST,
                        HttpEntityUtils.getHttpEntity(moduleCode), CompletableFuture.class);
                if (response.getStatusCode() != HttpStatus.CREATED && response.getStatusCode() != HttpStatus.ACCEPTED) {
                    String errorMessage = ErrorResourceUtil.getErrorMessage((HashMap) response.getBody(),"Unable to send fcm");
                    setStatusToFailedByBulkFcmId(bulkFcmId);
                    throw new ClientException(errorMessage);
                }

您是否可以尝试按以下方式创建它，而不是传递完整的未来：

使用异步方法在admin中调用rest模板：

@Async
public CompletableFuture<List<BusinessObject>> getResponseAsynchronously(String value) {
    String url = "https://restendpoint.eu/rest/v2/lang/" + value + "?fields=name";
    BusinessObject[] response = restTemplate.getForObject(url, Country[].class);
    return CompletableFuture.completedFuture(Arrays.asList(response));
}

然后在控制器中读取CompletableFuture，如下所示：

@GetMapping("")
public List<String> getAllDataFromRestCall() throws Throwable {

    CompletableFuture<List<BusinessObject>> businessObjectsFuture = countryClient.getResponseAsynchronously("fr");
    List<String> europeanFrenchSpeakingCountries;

            try {
                europeanFrenchSpeakingCountries = new ArrayList<>(businessObjectsFuture
                .get()
                .stream()
                .map(Country::getName)
                .collect(Collectors.toList()));

     } catch (Throwable e) {
       throw e.getCause();
     }

   return europeanFrenchSpeakingCountries;
}