Springboot集成etcd 增删改查demo_springboot 集成etcd数据库-优快云博客

本文链接：https://blog.youkuaiyun.com/wenlinsai/article/details/129414693

该代码示例展示了如何在Java中配置Etcd客户端，初始化各种服务如KV、Lock、Lease和Watch，并提供了服务端的增删改查操作。EtcdClient类包含了Etcd服务的各个组件，而EtcdService类则实现了基本的数据读写功能。

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一.客户端设置

package com.lemon.thread.etcd.config;

import io.etcd.jetcd.*;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.PropertySource;
import org.springframework.stereotype.Component;

import javax.annotation.PostConstruct;
import javax.annotation.PreDestroy;

/**
 * @author william
 * @date 2023/3/8 0008
 * @apinote
 */
@Component
@PropertySource(value= {"classpath:application.properties"},ignoreResourceNotFound=true)
public class EtcdClient  {

    @Value("${endpoints:http://127.0.0.1:2379}")
    private String endpoints;

    private Client client;

    private KV kv;

    private Lock lock;

    private Lease lease;

    private Watch watch;

    private Election election;

    private final String DOUHAO = ",";

    @PostConstruct
    private void init() {
        client= Client.builder().endpoints("http://127.0.0.1:2379").build();
        kv=client.getKVClient();
        lock=client.getLockClient();
        lease=client.getLeaseClient();
        watch=client.getWatchClient();
        election=client.getElectionClient();

    }

    @PreDestroy
    private void destroy() {
        election.close();
        kv.close();
        lease.close();
        watch.close();
        lock.close();
        client.close();
    }

    public KV getKv() {
        return kv;
    }

    public void setKv(KV kv) {
        this.kv = kv;
    }

    public Lock getLock() {
        return lock;
    }

    public void setLock(Lock lock) {
        this.lock = lock;
    }

    public Lease getLease() {
        return lease;
    }

    public void setLease(Lease lease) {
        this.lease = lease;
    }

    public Watch getWatch() {
        return watch;
    }

    public void setWatch(Watch watch) {
        this.watch = watch;
    }

    public Election getElection() {
        return election;
    }

    public void setElection(Election election) {
        this.election = election;
    }
}

二.服务端增删改查:

package com.lemon.thread.etcd.config;


import io.etcd.jetcd.ByteSequence;
import io.etcd.jetcd.KeyValue;
import io.etcd.jetcd.kv.GetResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.nio.charset.StandardCharsets;
import java.util.List;
import java.util.concurrent.ExecutionException;

@Service
public class EtcdService {

    @Autowired
    private EtcdClient etcdClient;

    public String get(String key) throws InterruptedException, ExecutionException {
        ByteSequence byteKey = ByteSequence.from(key, StandardCharsets.UTF_8);
        GetResponse response = etcdClient.getKv().get(byteKey).get();
        List<KeyValue> values = response.getKvs();
        if (!values.isEmpty()) {
            return values.get(0).getValue().toString(StandardCharsets.UTF_8);
        }
        return null;
    }

    public void put(String key, String value) throws InterruptedException, ExecutionException {
        ByteSequence byteKey = ByteSequence.from(key, StandardCharsets.UTF_8);
        ByteSequence byteValue = ByteSequence.from(value, StandardCharsets.UTF_8);
        etcdClient.getKv().put(byteKey, byteValue).get();
    }

    public void delete(String key) throws InterruptedException, ExecutionException {
        ByteSequence byteKey = ByteSequence.from(key, StandardCharsets.UTF_8);
        etcdClient.getKv().delete(byteKey).get();
    }
}

总结:可以实现简单的增删改查