Preface

nacos Detailed use of configuration management .

Section 1 Configuration list

1. Modifying data

Modifying data , Click publish , Pop up content comparison , Help users reduce modification errors , Differences in the occurrence of data items , Click OK to publish .

2. Export import

When we want to start from the namespace A Move the configuration of to namespace B when , There may be a lot of content , At this time, the export and import function is used to improve efficiency .
（1） export

（2） Switch namespace , And click Import configuration , Select the file you just downloaded .

3. clone

We can also use cloning , take A The configuration of the namespace is cloned into the namespace B

In the second quarter Version history

We can view the historical modification record of the configuration file through the historical version function , And historical versions of belief information , You can also click rollback , Replace the current content with a historical version .

Details

In the third quarter Monitor query

nacos It provides the ability to configure the query of subscribers, i.e. listeners , At the same time, the current configuration of the client is provided MD5 Check value , In order to help users better check whether configuration changes are pushed to client paragraph .
Just add a listener here .

package com.it2;

import com.alibaba.nacos.api.NacosFactory;
import com.alibaba.nacos.api.config.ConfigService;
import com.alibaba.nacos.api.config.listener.Listener;
import com.alibaba.nacos.api.exception.NacosException;

import java.util.Properties;
import java.util.concurrent.Executor;
import java.util.concurrent.TimeUnit;

public class NacosDemo02 {
    

    public static void main(String[] args) throws NacosException, InterruptedException {
    


        String dataId="nacos-demo.yaml";
        String group="DEFAULT_GROUP";

        String serverAddr="127.0.0.1:8848";

        Properties properties=new Properties();
        properties.put("serverAddr",serverAddr);
        // This is from wrong public Get configuration set from namespace of , You need a namespace id
        properties.put("namespace","d0f32411-9568-4cd3-a595-a1d98989bbeb");

        ConfigService configService=  NacosFactory.createConfigService(properties);
        String config=configService.getConfig(dataId,group,3000);
        System.out.println(config);

        configService.addListener(dataId, group, new Listener() {
    
            public Executor getExecutor() {
    
                return null;
            }

            public void receiveConfigInfo(String s) {
    
                // Used to accept listening content 
                System.out.println(s);
            }
        });

        // Hibernation prevents the program from ending 
        TimeUnit.HOURS.sleep(1L);

    }
}

Run code , Output content .

At this time in nacos Modify this configuration file , Add information to the monitored configuration file , And publish .

When in nacos After the modified dataset is published , The listener immediately receives the new configuration content .

At the same time nacos Listening and querying under configuration management , We can also see what is being monitored ,MD5 The code represents the of the monitored data set MD5 code .