Netty: how to calculate client request queuing time

Question

We have Netty based HTTP server (build on Spring WebFlux) and need to implement a kind of client request statistics (request processing time per type, request queuing time, etc). Could you please advice what is the right way to calculate request queuing time in Netty, i.e. the time between the moment request is accepted by the input socket and passed to the corresponding handler.

Answer 1

You should create a WebClient from configured WebClient.Builder that has predefined metrics. For example:

@Configuration
public class WebClientConfiguration {
 
  @Bean
  public WebClient webClient(WebClient.Builder webClientBuilder) {
    return webClientBuilder
      .build();
  }
}