@Bean
    @Order(-5)
    @ConditionalOnProperty(name = "shenyu.fallback.enabled", havingValue = "true")
    public WebFilter fallbackFilter(final ShenyuConfig shenyuConfig, final DispatcherHandler dispatcherHandler) {
        return new FallbackFilter(shenyuConfig.getFallback().getPaths(), dispatcherHandler);
    }
fallback filter.

@param shenyuConfig the shenyu config
@param dispatcherHandler the dispatcher handler
@return the fallback web filter
shenyu-spring-boot-starter/shenyu-spring-boot-starter-gateway/src/main/java/org/apache/shenyu/springboot/starter/gateway/ShenyuConfiguration.java