@Bean
    public DiscoveryUpstreamDataSubscriber discoveryUpstreamDataHandler(final ObjectProvider<List<DiscoveryUpstreamDataHandler>> discoveryUpstreamDataHandlers) {
        List<DiscoveryUpstreamDataHandler> proxySelectorDataHandlerList = discoveryUpstreamDataHandlers.getIfAvailable(Collections::emptyList);
        return new CommonDiscoveryUpstreamDataSubscriber(proxySelectorDataHandlerList);
    }
Common discoveryUpstream Selector  subscriber.

@param discoveryUpstreamDataHandlers discoveryUpstreamDataHandlers
@return DiscoveryUpstreamDataSubscriber
shenyu-spring-boot-starter/shenyu-spring-boot-starter-plugin/shenyu-spring-boot-starter-plugin-global/src/main/java/org/apache/shenyu/springboot/starter/plugin/global/GlobalPluginConfiguration.java