Spring boot 2 WebClient get context parameter in subscriber

Question

I am using WebClient to call an external API, I am associating a requestId for each request. Once the request is processed and response is received, I am updating some table using the requestId so that I can confirm all the data associated with the requestId are processed.

public void getEmployeeData(List<Integer>employeeIds, String requestId){
   WebClient webClient = WebClient.builder().baseUrl(baseUrl).build();

   webClient.post().uri(uri)
            .contentType(MediaType.APPLICATION_JSON_UTF8)
            .accept(MediaType.APPLICATION_JSON_UTF8)
            .header(HttpHeaders.AUTHORIZATION, "Basic " + Base64Utils
            .encodeToString((plainCreds)
            .getBytes(Charset.defaultCharset())))
            .body(BodyInserters.fromObject(body)).retrieve()
            .bodyToFlux(EmployeeInfo.class)
            .doOnError(throwable -> {
               Mono.error(throwable);
            }).subscribe(new Consumer<EmployeeInfo>() {
                @Override
                public void accept(EmployeeInfo employeeInfo) {
                    // Here I need the requestId which is passed as function 
                    //parameter
              }
            }); 
}

The above function receives list of employee Ids with a requestid, i have to call external API to get the Information for the list of employees, before calling this function i am saving all the list of employees against the requestid, so that once the response is received I can update the table stating that all the employee info is received for given requestId. Now in the subscriber part i need the requestId so that I can correlate that the response received belongs to a particular requestid

where is that requestId you're referring to? What have you tried? Why isn't that working? Do you need to do something with the data returned from the remote service? — Brian Clozel, May 23 '18 at 07:37
@BrianClozel I have updated the question with more clear example — Brajesh Pant, May 24 '18 at 06:02
I still don't get the issue. The `requestId` method parameter is available in that scope. Why can't you reuse the `requestId` that you've got here? Where do you expected to find that information otherwise? — Brian Clozel, Jun 14 '18 at 12:32

score 3 · Accepted Answer · answered Jun 15 '18 at 15:43

3

You may add final on requestId so that it's usable on your subscribe function.

public void getEmployeeData(List<Integer>employeeIds, final String requestId){

answered Jun 15 '18 at 15:43

jjcosare

1,463
9
9

Spring boot 2 WebClient get context parameter in subscriber

1 Answers1