What is the ServletFilter equalent of a RabbitMq L

问题:

I have a spring-boot web application for which I implemented an MDCFilter that adds a UUID to MDC logging context that i can find in the log file.

The Filter class looks like this.

public class MDCFilter implements Filter {

  @Override
  public void init(FilterConfig filterConfig) {
  }

  @Override
  public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain)
      throws IOException, ServletException {

    String requestId = UUID.randomUUID().toString();

    MDC.put(REQUEST_ID_KEY, requestId);
    response.addHeader("trace", requestId);
    try {
      chain.doFilter(req, resp);
    } finally {
      MDC.remove("trace");
    }
  }

  @Override
  public void destroy() {
  }
}

But recently we moved towards processing traffic via Queues and I have no clue from the documents to replicate this filter behaviour for the message listeners.

My listener would look something like this.

@RabbitListener(queues = "${queue1}")
public void receiveMessages(Message message) {
doTheBusinessLogic(message)
}

Can anyone point me to the right direction ?

回答1:

Use the container's adviceChain. Assuming you are using Boot 2.0 and the simple container factory, override boot's factory to add the advice...

@SpringBootApplication
public class So49770881Application {

    public static void main(String[] args) {
        SpringApplication.run(So49770881Application.class, args);
    }

    @Bean(name = "rabbitListenerContainerFactory")
    public SimpleRabbitListenerContainerFactory simpleRabbitListenerContainerFactory(
            SimpleRabbitListenerContainerFactoryConfigurer configurer,
            ConnectionFactory connectionFactory) {
        SimpleRabbitListenerContainerFactory factory = new SimpleRabbitListenerContainerFactory();
        configurer.configure(factory, connectionFactory);
        factory.setAdviceChain(new MDCAdvice());
        return factory;
    }

    public static class MDCAdvice implements MethodInterceptor {

        @Override
        public Object invoke(MethodInvocation invocation) throws Throwable {
            // pre process
            try {
                return invocation.proceed();
            }
            finally {
                // post process
            }
        }

    }

}