Custom interceptor in Spring Boot [ADD HTTP REQUEST HEADER]

Question

I trying to create a custom interceptor in a spring boot app for add a header in each http request.

for example:
POSTMAN --[GET: http://some_url] --> INTERCEPTOR -- [ADD HEADER "ID"] --> RestController [GET HEADER ID].

I tried to create an interceptor like this

@Component
public class LogRequestHandler implements ClientHttpRequestInterceptor {
private final Logger log = LoggerFactory.getLogger(LogRequestHandler.class);

  @Override
  public ClientHttpResponse intercept(HttpRequest httpRequest, byte[] bytes, 
                ClientHttpRequestExecution clientHttpRequestExecution) throws IOException {
    String trackingId = RandomStringUtils.randomAlphanumeric(8);
    long timestamp = ZonedDateTime.now(ZoneOffset.UTC).toInstant().toEpochMilli();
    log.info("Request [{}] {} {}", trackingId, httpRequest.getMethod(), httpRequest.getURI());
    httpRequest.getHeaders().add("TRACKING_ID", trackingId);
    httpRequest.getHeaders().add("TIMESTAMP", String.valueOf(timestamp));
    return clientHttpRequestExecution.execute(httpRequest, bytes);
  }
} 

but i don't know how add this to spring configuration :((
Can someone confirm if my approach it's correct or suggest other idea?
Thx in advance.

Answer 1

in spring WebMvcConfigurerAdapter you have the method dedicated for that

public void addInterceptors(InterceptorRegistry registry)

so you can do something like this:

@Configuration
public class WebMvcConfig extends WebMvcConfigurerAdapter {

  @Autowired 
  HandlerInterceptor yourInterceptor;

  @Override
  public void addInterceptors(InterceptorRegistry registry) {
    registry.addInterceptor(yourInterceptor);
  }
}