@Bean
    public PluginDataHandler cachePluginDataHandler() {
        return new CachePluginDataHandler();
    }
the cache handler.
@return the shenyu handler
shenyu-spring-boot-starter/shenyu-spring-boot-starter-plugin/shenyu-spring-boot-starter-plugin-cache/src/main/java/org/apache/shenyu/springboot/starter/plugin/cache/CachePluginConfiguration.java