在程序服務(wù)啟動(dòng)時(shí)通過(guò)分布式鎖 Redisson（基于Redis實(shí)現(xiàn)），對(duì)每臺(tái)機(jī)器通過(guò)IP 對(duì)應(yīng)一個(gè) 唯一的機(jī)器號(hào)（自增）映射，并保存在Redis中。緩存一次后，下次啟動(dòng)直接讀取緩存即可

在這里插入圖片描述

基于注冊(cè)中心指定唯一機(jī)器號(hào)

從注冊(cè)中心讀取服務(wù)，增加多一個(gè)機(jī)器號(hào)服務(wù)來(lái)統(tǒng)一分配

在這里插入圖片描述

基于第一種實(shí)現(xiàn)方案

Maven依賴

       <dependency>
            <groupId>org.redisson</groupId>
            <artifactId>redisson-spring-boot-starter</artifactId>
            <version>3.10.6</version>
        </dependency> 
		<dependency>
		    <groupId>cn.hutool</groupId>
		    <artifactId>hutool-core</artifactId>
		    <version>5.7.19</version>
		</dependency>
        <dependency>
            <groupId>com.github.yitter</groupId>
            <artifactId>yitter-idgenerator</artifactId>
            <version>1.0.6</version>
        </dependency>

關(guān)鍵部分代碼

/**
 * Redisson分布式鎖工具類(lèi)
 */
@Component
public class RedissonUtil {

    @Autowired
    private RedissonClient redissonClient;

    /**
     * 加鎖
     * @param lockKey
     * @return
     */
    public RLock lock(String lockKey) {
        RLock lock = redissonClient.getLock(lockKey);
        lock.lock();
        return lock;
    }

    /**
     * 帶超時(shí)的鎖
     * @param lockKey
     * @param timeout 超時(shí)時(shí)間 單位：秒
     */
    public RLock lock(String lockKey, long timeout) {
        RLock lock = redissonClient.getLock(lockKey);
        lock.lock(timeout, TimeUnit.SECONDS);
        return lock;
    }

    /**
     * 帶超時(shí)的鎖
     * @param lockKey
     * @param unit 時(shí)間單位
     * @param timeout 超時(shí)時(shí)間
     */
    public RLock lock(String lockKey, TimeUnit unit ,long timeout) {
        RLock lock = redissonClient.getLock(lockKey);
        lock.lock(timeout, unit);
        return lock;
    }

    /**
     * 嘗試獲取鎖
     * @param lockKey
     * @param waitTime 最多等待時(shí)間
     * @param unit TimeUnit時(shí)間單位
     * @return
     */
    public  boolean tryLock(String lockKey,long waitTime, TimeUnit unit) {
        RLock lock = redissonClient.getLock(lockKey);
        try {
            return lock.tryLock(waitTime, unit);
        } catch (InterruptedException e) {
            return false;
        }
    }

    /**
     * 嘗試獲取鎖
     * @param lockKey
     * @param waitTime 最多等待時(shí)間
     * @param leaseTime 上鎖后自動(dòng)釋放鎖時(shí)間
     * @return
     */
    public  boolean tryLock(String lockKey, long waitTime, long leaseTime) {
        RLock lock = redissonClient.getLock(lockKey);
        try {
            return lock.tryLock(waitTime, leaseTime, TimeUnit.SECONDS);
        } catch (InterruptedException e) {
            return false;
        }
    }

    /**
     * 嘗試獲取鎖
     * @param lockKey
     * @param unit 時(shí)間單位
     * @param waitTime 最多等待時(shí)間
     * @param leaseTime 上鎖后自動(dòng)釋放鎖時(shí)間
     * @return
     */
    public boolean tryLock(String lockKey, TimeUnit unit, long waitTime, long leaseTime) {
        RLock lock = redissonClient.getLock(lockKey);
        try {
            return lock.tryLock(waitTime, leaseTime, unit);
        } catch (InterruptedException e) {
            return false;
        }
    }

    /**
     * 釋放鎖
     * @param lockKey
     */
    public void unlock(String lockKey) {
        RLock lock = redissonClient.getLock(lockKey);
        lock.unlock();
    }

    /**
     * 若沒(méi)用鎖情況下，就不調(diào)用釋放鎖的代碼，若有鎖情況下才調(diào)用釋放鎖
     * @param lockKey
     */
    public void unlockIgnore(String lockKey) {
        RLock lock = redissonClient.getLock(lockKey);
        if ( !lock.isLocked() ) {
           return ;
        }
        lock.unlock();
    }


    /**
     * 釋放鎖
     * @param lock
     */
    public void unlock(RLock lock) {
        lock.unlock();
    }

}

啟動(dòng)配置代碼如下

 
@Slf4j
@Component
@Order(0)
public class SystemInitConfig implements CommandLineRunner {

    @Autowired
    private RedissonUtil redissonUtil;

    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 分布式鎖Key
     */
    private static final String CACHE_ID_GENERATOR = "LOCK_ID_GENERATOR";

    /**
     * 最大機(jī)器號(hào)Key
     */
    private static final String CACHE_WORKERID_MAXID= "CACHE_WORKERID_MAXID";

    /**
     * 已分配的機(jī)器號(hào)Key
     */
    private static final String CACHE_ID_IP = "CACHE_ID_IP";

    @Override
    public void run(String... args) throws Exception {
        //獲取mac地址
        String macAddress = NetUtil.getLocalhost().getHostAddress();
        log.info("{} 配置分布式Id Work緩存========開(kāi)始",macAddress);
        boolean existWorkerId =  redisTemplate.opsForHash().hasKey(CACHE_ID_IP, macAddress);
        //若已緩存在緩存中，直接跳過(guò)不設(shè)置
        if (existWorkerId) {
            log.info("{} 已配置分布式Id Work...",macAddress);
            return ;
        }
        try {
            //分布式鎖等待120秒，執(zhí)行時(shí)長(zhǎng)最大120秒
            boolean  locked = redissonUtil.tryLock(CACHE_ID_GENERATOR, 120, 120);
            if (!locked) {
                throw new RuntimeException(macAddress+"設(shè)置分布式Id機(jī)器號(hào)失敗");
            }
            ValueOperations <String,Integer> stringOperation = redisTemplate.opsForValue();
            boolean initWorkerId = stringOperation.setIfAbsent(CACHE_WORKERID_MAXID, 1);
            if( !initWorkerId ) {
                //若已存在key，對(duì)最大的機(jī)器號(hào)自增1
                stringOperation.increment(CACHE_WORKERID_MAXID);
            }
            Integer workerId =   stringOperation.get(CACHE_WORKERID_MAXID);
            IdGeneratorOptions options = new IdGeneratorOptions( workerId.shortValue());
            YitIdHelper.setIdGenerator(options);
            //設(shè)置mac地址 - workerid 到hash結(jié)構(gòu)
            redisTemplate.opsForHash().put(CACHE_ID_IP,macAddress,workerId);
            log.info("已配置分布式Id Work,{} - {}",macAddress,workerId);
        } finally {
            redissonUtil.unlock(CACHE_ID_GENERATOR);
            log.info("{} 配置分布式Id Work緩存========結(jié)束",macAddress);
        }

    }
}

直接在代碼使用即可

YitIdHelper.nextId()

到此這篇關(guān)于SpringBoot集成yitter-idgenerator(雪花漂移)分布式Id自增的實(shí)現(xiàn)的文章就介紹到這了,更多相關(guān)SpringBoot 分布式Id自增內(nèi)容請(qǐng)搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持腳本之家！

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