{"id":15330281,"url":"https://github.com/wolfstudy/snowflake","last_synced_at":"2026-04-15T17:31:24.168Z","repository":{"id":73616449,"uuid":"112235458","full_name":"wolfstudy/SnowFlake","owner":"wolfstudy","description":"twitter的snowflake算法 -- java实现","archived":false,"fork":false,"pushed_at":"2017-11-27T19:01:22.000Z","size":7,"stargazers_count":0,"open_issues_count":0,"forks_count":0,"subscribers_count":0,"default_branch":"master","last_synced_at":"2025-12-26T06:49:33.279Z","etag":null,"topics":[],"latest_commit_sha":null,"homepage":"","language":"Java","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":null,"status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/wolfstudy.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":null,"code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null}},"created_at":"2017-11-27T18:55:53.000Z","updated_at":"2017-11-27T18:57:44.000Z","dependencies_parsed_at":null,"dependency_job_id":"46172ce2-14be-4279-8ec2-e8163874bc68","html_url":"https://github.com/wolfstudy/SnowFlake","commit_stats":{"total_commits":5,"total_committers":1,"mean_commits":5.0,"dds":0.0,"last_synced_commit":"aad19b3a88a45ab4894cc129fb761f1a1cc3c71d"},"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/wolfstudy/SnowFlake","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/wolfstudy%2FSnowFlake","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/wolfstudy%2FSnowFlake/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/wolfstudy%2FSnowFlake/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/wolfstudy%2FSnowFlake/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/wolfstudy","download_url":"https://codeload.github.com/wolfstudy/SnowFlake/tar.gz/refs/heads/master","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/wolfstudy%2FSnowFlake/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":31852642,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-04-15T15:24:51.572Z","status":"ssl_error","status_checked_at":"2026-04-15T15:24:39.138Z","response_time":63,"last_error":"SSL_read: unexpected eof while reading","robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":false,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":[],"created_at":"2024-10-01T09:52:27.721Z","updated_at":"2026-04-15T17:31:24.150Z","avatar_url":"https://github.com/wolfstudy.png","language":"Java","funding_links":[],"categories":[],"sub_categories":[],"readme":"# SnowFlake\n每一位的具体解释\n\n    1位，不用。二进制中最高位为1的都是负数，但是我们生成的id一般都使用整数，所以这个最高位固定是0\n\n    41位，用来记录时间戳（毫秒）。\n        41位可以表示241−1个数字，\n        如果只用来表示正整数（计算机中正数包含0），可以表示的数值范围是：0 至 241−1，减1是因为可表示的数值范围是从0开始算的，而不是1。\n        也就是说41位可以表示241−1个毫秒的值，转化成单位年则是(241−1)/(1000∗60∗60∗24∗365)=69年\n\n    10位，用来记录工作机器id。\n        可以部署在210=1024个节点，包括5位datacenterId和5位workerId\n        5位（bit）可以表示的最大正整数是25−1=31，即可以用0、1、2、3、....31这32个数字，来表示不同的datecenterId或workerId\n\n    12位，序列号，用来记录同毫秒内产生的不同id。\n        12位（bit）可以表示的最大正整数是212−1=4096，即可以用0、1、2、3、....4095这4096个数字，来表示同一机器同一时间截（毫秒)内产生的4096个ID序号\n\n由于在Java中64bit的整数是long类型，所以在Java中SnowFlake算法生成的id就是long来存储的。\n\nSnowFlake可以保证：\n\n    所有生成的id按时间趋势递增\n    整个分布式系统内不会产生重复id（因为有datacenterId和workerId来做区分）\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fwolfstudy%2Fsnowflake","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fwolfstudy%2Fsnowflake","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fwolfstudy%2Fsnowflake/lists"}