Micrometer Tracing Support for Access Logs about logback-access-spring-boot-starter HOT 6 OPEN

@WebFilter
public class SleuthAttrsFilter implements Filter {

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        // Stores Spring Cloud Sleuth attributes for logging by logback-access-spring-boot-starter
        TraceContext context = (TraceContext) request.getAttribute(TraceContext.class.getName());
        request.setAttribute(SleuthAttrsFilter.class.getName() + ".traceId", context.traceId());
        request.setAttribute(SleuthAttrsFilter.class.getName() + ".spanId", context.spanId());
        chain.doFilter(request, response);
    }

}

@Bean
public FilterRegistrationBean<SleuthAttrsFilter> sleuthAttrsFilter() {
    SleuthAttrsFilter filter = new SleuthAttrsFilter();
    FilterRegistrationBean<SleuthAttrsFilter> bean = new FilterRegistrationBean<>(filter);
    bean.setDispatcherTypes(DispatcherType.FORWARD, DispatcherType.INCLUDE,
            DispatcherType.REQUEST, DispatcherType.ASYNC, DispatcherType.ERROR);
    return bean;
}

import java.io.IOException;

import org.springframework.lang.Nullable;
import org.springframework.web.filter.OncePerRequestFilter;

import io.micrometer.tracing.Span;
import io.micrometer.tracing.TraceContext;
import io.micrometer.tracing.Tracer;
import jakarta.servlet.FilterChain;
import jakarta.servlet.ServletException;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import lombok.RequiredArgsConstructor;

@RequiredArgsConstructor
public class TracingAttributesFilter extends OncePerRequestFilter {

    @Nullable
    private final Tracer tracer;

    @Override
    protected void doFilterInternal(final HttpServletRequest request, final HttpServletResponse response, final FilterChain chain)
            throws ServletException, IOException {

        if (tracer != null) {
            final Span span = tracer.currentSpan();
            if (span != null) {
                final TraceContext traceContext = span.context();
                if (traceContext != null) {
                    request.setAttribute(TracingAttributesFilter.class.getName() + "traceId", traceContext.traceId());
                    request.setAttribute(TracingAttributesFilter.class.getName() + "spanId", traceContext.spanId());
                    request.setAttribute(TracingAttributesFilter.class.getName() + "parentId", traceContext.parentId());
                }
            }
        }

        chain.doFilter(request, response);
    }
}