nacos配置中文动态监听刷新，微服务常用应用

配置文件需要动态更新，在日常应用中非常广泛，如（国际化配置，第三方秘钥修改等等 ），提供一下例子仅供学习交流

 

package *;

import ch.qos.logback.classic.Level;
import ch.qos.logback.classic.LoggerContext;
import com.alibaba.cloud.nacos.NacosConfigManager;
import com.alibaba.cloud.nacos.NacosConfigProperties;
import com.alibaba.fastjson.JSONObject;
import com.alibaba.nacos.api.config.listener.Listener;
import com.alibaba.nacos.api.exception.NacosException;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.lang3.concurrent.BasicThreadFactory;
import org.slf4j.LoggerFactory;
import org.springframework.boot.ApplicationArguments;
import org.springframework.boot.ApplicationRunner;
import org.springframework.stereotype.Component;
import org.yaml.snakeyaml.Yaml;
import org.yaml.snakeyaml.constructor.Constructor;

import javax.annotation.Resource;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.util.Objects;
import java.util.concurrent.Executor;
import java.util.concurrent.ScheduledThreadPoolExecutor;

/**
 * nacos文件更新处理
 * @author Simon
 */
@Component
@Slf4j
public class NacosListener implements ApplicationRunner {

    @Resource
    private NacosConfigProperties nacosConfigProperties;

    @Override
    public void run(ApplicationArguments args) throws Exception {
        var configService = new NacosConfigManager(nacosConfigProperties).getConfigService();
        try {
            //配置文件名称，这里是例子找出第一个配置文件此处文件自定义配置
            var config = nacosConfigProperties.getSharedConfigs().get(0);
            configService.addListener(config.getDataId(), config.getGroup(), new Listener() {
                @Override
                public Executor getExecutor() {
                    return new ScheduledThreadPoolExecutor(1,
                            new BasicThreadFactory.Builder().namingPattern("nacos-listen-pool-%d").daemon(Boolean.TRUE).build());
                }
                @Override
                public void receiveConfigInfo(String content) {
                    if (StringUtils.isNotEmpty(content)) {
                        loadData(content);
                    }
                }
            });
            log.info("nacos配置文件动态更新已添加监听");
        } catch (NacosException e) {
            log.error("nacos配置文件错误");
        }
    }


    public void loadData(String content){
        log.info("nacos主配置文件发生变化{}", content);
        //默认解析yaml格式的文件，其他类型自行配置解析
        Yaml yaml = new Yaml(new Constructor(JSONObject.class));
        InputStream inputStream = new ByteArrayInputStream(content.getBytes());
        JSONObject load = yaml.load(inputStream);
        //例子，如更新日志级别
        var logLevel = load.getJSONObject("log");
        if (Objects.nonNull(logLevel)) {
            var sqlLevel = logLevel.get("sql_level");
            if(Objects.nonNull(sqlLevel)){
                log.info("sql日志级别动态修改:{}",sqlLevel);
                LoggerContext loggerContext = (LoggerContext) LoggerFactory.getILoggerFactory();
                loggerContext.getLogger("此处为代码对应的包名").setLevel(Level.toLevel(sqlLevel.toString(),Level.DEBUG));
            }
        }
    }
}