为什么brave.Tracer不能在@Configuration类中自动显示？

Question

我正在将spring升级到2.6.2，spring升级到2021.0.0，在升级之后，brave.Tracer无法在@Configuration类中自动加载。

Tracer作为参数自动使用@Bean组件。

我已经在这个question中尝试过解决方案，但是不起作用。

下面是@Configuration类：

@Configuration
@ConditionalOnWebApplication
@AutoConfigureAfter(CommonsAutoConfig.class)
@EnableConfigurationProperties({CorsConfig.class, TracingConfiguration.class})
public class WebCommonsAutoConfig
{
    ......
    @Bean(name = "httpRestRequestResponseLogger")
    @RefreshScope
    public FilterRegistrationBean httpRestRequestResponseLogger(
            RequestResponseLogger requestResponseLogger, 
            HeaderAccessor headerAccessor,
            Tracer tracer, 
            HeaderExtractor<HttpServletRequestLoggingWrapper> httpHeaderExtractor)
    {
        final HttpLogFilter httpLogFilter=  new HttpLogFilter(requestResponseLogger, 
                   headerAccessor, tracer, httpHeaderExtractor);
        final FilterRegistrationBean registrationBean = new FilterRegistrationBean();
        registrationBean.setFilter(httpLogFilter);
        registrationBean.setDispatcherTypes(ASYNC, ERROR, FORWARD, INCLUDE, REQUEST);
        registrationBean.setOrder(HttpLogFilter.ORDER);
        return registrationBean;
    }
    ....
}

具有以下错误日志：

...
Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error 
creating bean with name 'scopedTarget.httpRestRequestResponseLogger' defined in class 
path resource [com/vzt/WebCommonsAutoConfig.class]: Unsatisfied dependency expressed 
through method 'httpRestRequestResponseLogger' parameter 2; 
...
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No 
qualifying bean of type 'brave.Tracer' available: expected at least 1 bean which 
qualifies as autowire candidate. Dependency annotations: {}

那么，在这个@Configuration类中，我应该如何使brave.Tracer自动显示呢？

Answer 1

很可能您需要添加@AutoConfigureAfter(BraveAutoConfiguration.class).据我所知，春云之夜就在林荫大道上？