基于雪花算法的增强版ID生成器
- 解决了时间回拨的问题
- 无需手动指定workId, 微服务环境自适应
- 可配置化
快速开始
1.依赖引入
1 | <dependency><groupid>io.github.mocreates</groupid><artifactid>uid-generator</artifactid><version>2.0-RELEASE</version></dependency> |
2.配置序列器 Sequence
1 2 3 4 5 | @Beanpublic Sequence sequence() { SequenceConfig sequenceConfig = new SimpleSequenceConfig(); return new Sequence(sequenceConfig);} |
3.使用序列器生成ID
1 2 3 4 5 6 | @Autowiredprivate Sequence sequence;public long generateId() { return sequence.nextId();} |
配置解析
目前提供两个配置类
io.github.mocreates.config.DefaultSequenceConfigio.github.mocreates.config.SimpleSequenceConfig
前者需要显式地指定 workerId、datacenterId，可以结合数据库来使用，后者是利用网卡信息进行自适应
详情
| 字段名 | 释义 | 默认值 |
|---|---|---|
| twepoch | 可以被设置为最接近项目启用前的某个时间点（unix 时间戳) | 1665817757000L |
| workerIdBits | 机器位所占的bit位数 | 19L |
| datacenterIdBits | 数据标识位所占的bit位数 | 0L |
| sequenceBits | 毫秒内自增位数 | 3L |
| workerId | 机器位 | |
| datacenterId | 数据位 | 0L |
| inetAddress | 网络相关信息 |
生产推荐使用方式
1.依赖引入
1 | <dependency><groupid>io.github.mocreates</groupid><artifactid>uid-generator</artifactid><version>2.0-RELEASE</version></dependency> |
2.创建表
1 2 3 4 5 6 7 | CREATE TABLE `worker_node` ( `id` bigint(20) NOT NULL AUTO_INCREMENT, `node_info` varchar(512) NOT NULL, `gmt_create` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP, `gmt_modify` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, PRIMARY KEY (`id`)) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='DB WorkerID Assigner for UID Generator'; |
3.配置 (利用主键自增来分配workerId, 解决分布式环境下手动指定workerId的痛点)
1 2 3 4 5 6 7 8 9 10 | @Beanpublic Sequence sequence(WorkerNodeMapper workerNodeMapper) throws UnknownHostException { WorkerNode workerNode = new WorkerNode(); InetAddress localHost = InetAddress.getLocalHost(); workerNode.setNodeInfo(localHost.toString()); workerNodeMapper.insertSelective(workerNode); DefaultSequenceConfig defaultSequenceConfig = new DefaultSequenceConfig(); defaultSequenceConfig.setWorkerId(workerNode.getId()); return new Sequence(defaultSequenceConfig);} |
4.使用序列器生成ID
1 2 3 4 5 6 | @Autowiredprivate Sequence sequence;public long generateId() { return sequence.nextId();} |
JMH 性能测试
测试机硬件情况
MacBook Pro (13-inch, M1, 2020) 8C 16G
Sequence 配置参数
1 2 3 4 5 6 7 8 9 10 11 12 | private static final DefaultSequenceConfig SEQUENCE_CONFIG = new DefaultSequenceConfig();static { SEQUENCE_CONFIG.setSequenceBits(22); SEQUENCE_CONFIG.setWorkerIdBits(0); SEQUENCE_CONFIG.setDatacenterIdBits(0); SEQUENCE_CONFIG.setTwepoch(System.currentTimeMillis()); SEQUENCE_CONFIG.setWorkerId(0L); SEQUENCE_CONFIG.setDatacenterId(0L);}private static final Sequence SEQUENCE = new Sequence(SEQUENCE_CONFIG); |
JMH参数
1 2 3 4 5 6 7 | @BenchmarkMode(Mode.Throughput)@Threads(10)@Warmup(iterations = 3, time = 10, timeUnit = TimeUnit.SECONDS)@Measurement(iterations = 10, time = 10, timeUnit = TimeUnit.SECONDS)@State(value = Scope.Benchmark)@Fork(1)@OutputTimeUnit(TimeUnit.SECONDS) |
测试结果
| Benchmark | Mode | Cnt | Score | Error | Units |
|---|---|---|---|---|---|
| SingleNodeSequenceTest.nextIdTest | thrpt | 10 | 27825573.565 ± 962298.054 | ops/s |
Tip
如果对qps性能要求较高，可以适当调整sequenceBits
仓库地址
https://github.com/mocreates/sequence
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