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开源软件名称:moth-sequence开源软件地址:https://gitee.com/tuzhe/moth-sequence开源软件介绍:#moth-sequence分布式 ID 生成算法,目前只有 twitter 的 snowflake 算法 在获取系统毫秒时,每次调用 native 方法, 有一定的性能问题,为了解决这个问题,可以后台更新此毫秒,调用时从内存中读取毫秒 /** * Returns the current time in milliseconds. Note that * while the unit of time of the return value is a millisecond, * the granularity of the value depends on the underlying * operating system and may be larger. For example, many * operating systems measure time in units of tens of * milliseconds. * * <p> See the description of the class <code>Date</code> for * a discussion of slight discrepancies that may arise between * "computer time" and coordinated universal time (UTC). * * @return the difference, measured in milliseconds, between * the current time and midnight, January 1, 1970 UTC. * @see java.util.Date */public static native long currentTimeMillis(); |
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