HandlerInterceptorSpanDecorator Not run

[etsangsplk]

I am using https://github.com/spring-projects/spring-petclinic as a simple test example to test out how to use the library. A jaeger Tracer is configured and created. I only added PetClinicApplicationConfiguration that implements WebMvcConfigurer tow wireup a tracer and and TracingHandlerInterceptor. When I run the app, I can see the log message "TracingHandlerInterceptor added". But when I bring up the web and click on the front end . I am seeing the any of the HandlerInterceptorSpanDecorator being run. No log messages are printed from inside the Span decorator. .Below are the two files:

PetClinicApplicationConfiguraton.java

package org.springframework.samples.petclinic;

import org.springframework.context.annotation.Configuration;
import org.springframework.samples.tracing.TracerConfiguration;
import org.springframework.samples.petclinic.PetClinicApplication;
import org.springframework.samples.tracing.TracingHandlerDecorator;

import io.opentracing.Tracer;
import io.opentracing.util.GlobalTracer;
import io.opentracing.contrib.spring.web.interceptor.*;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.springframework.context.annotation.Bean;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import java.util.Arrays;
import java.util.List;

@Configuration
public class PetClinicApplicationConfiguration implements WebMvcConfigurer {
    private static Logger LOGGER = LogManager.getLogger();

    @Bean
    public Tracer tracer() {
        return (new TracerConfiguration()).getTracer(PetClinicApplication.SERVICE_NAME);
    }

    @Bean
    public List<HandlerInterceptorSpanDecorator> spanDecorators() {
        return Arrays.asList(new TracingHandlerDecorator());
    }
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new TracingHandlerInterceptor(GlobalTracer.get(), spanDecorators()));
        LOGGER.info("TracingHandlerInterceptor added");
    }

}

package org.springframework.samples.tracing;

import io.opentracing.Span;
import io.opentracing.contrib.spring.web.interceptor.*;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.springframework.web.method.HandlerMethod;
import org.bson.types.ObjectId;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Optional;

public class TracingHandlerDecorator implements HandlerInterceptorSpanDecorator {
private static Logger LOGGER = LogManager.getLogger();

@Override
public void onPreHandle(HttpServletRequest httpServletRequest,
                        Object handler,
                        Span span) {
    String metaData = HandlerUtils.methodName(handler);
    LOGGER.info("*************tracinghandledecorator***********");
    LOGGER.info("*******Global tracer*********** ={}", io.opentracing.util.GlobalTracer.get());
    if (metaData != null) {
        span.setOperationName(metaData);
        //SplunkUri uri = new SplunkUri(httpServletRequest.getRequestURI());
        //String tenantId = uri.getTenant();
        String requestId = getRequestId(httpServletRequest);
        span.setTag("requestId", requestId);
        //span.setTag("tenant", tenantId);
    }
}

@Override
public void onAfterCompletion(HttpServletRequest httpServletRequest,
                              HttpServletResponse httpServletResponse,
                              Object handler,
                              Exception ex,
                              Span span) {
    LOGGER.info("*************tracinghandledecorator ONAFTERCOMPLETION ***********");
}

@Override
public void onAfterConcurrentHandlingStarted(HttpServletRequest httpServletRequest,
                                             HttpServletResponse httpServletResponse,
                                             Object handler,
                                             Span span) {
    LOGGER.info("*************tracinghandledecorator AFTERCONCURRENTHANDLEING  STARTED***********");
}

private String getRequestId(HttpServletRequest request) {
    return Optional
        .ofNullable(request.getHeader("X-Request-Id"))
        .orElseGet(() -> ObjectId.get().toString());
}

/**
 * Helper class for deriving tags/logs from handler object.
 */
static class HandlerUtils {
    private HandlerUtils() {}

    /**
     * Class name of a handler serving request.
     */
    public static final String HANDLER_CLASS_NAME = "handler.class_simple_name";
    /**
     * Method name of handler serving request.
     */
    public static final String HANDLER_METHOD_NAME = "handler.method_name";
    /**
     * Spring handler object.
     */
    public static final String HANDLER = "handler";

    public static String methodName(Object handler) {
        return handler instanceof HandlerMethod
            ? ((HandlerMethod) handler).getMethod().getName() : null;
    }
}

}

[etsangsplk]

Closing. FilterRegistrationBean has not been initialized properly.