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Merge pull request #874 from jptx1234/v5-dev

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[bug修复] Snowflake 循环等待下一个时间时避免长时间循环，加入对时钟倒退的判断
This commit is contained in:
Golden Looly
2020-05-18 09:39:01 +08:00
committed by GitHub
parent 6b3be8468c a3eca85e12
commit bfab76bcb9
1 changed files with 7 additions and 1 deletions
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8
hutool-core/src/main/java/cn/hutool/core/lang/Snowflake.java
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@@ -177,9 +177,15 @@ public class Snowflake implements Serializable {
*/ */
private long tilNextMillis(long lastTimestamp) { private long tilNextMillis(long lastTimestamp) {
long timestamp = genTime(); long timestamp = genTime();
while (timestamp <= lastTimestamp) { // 循环直到操作系统时间戳变化
while (timestamp == lastTimestamp) {
timestamp = genTime(); timestamp = genTime();
} }
if (timestamp < lastTimestamp) {
// 如果发现新的时间戳比上次记录的时间戳数值小，说明操作系统时间发生了倒退，报错
throw new IllegalStateException(
StrUtil.format("Clock moved backwards. Refusing to generate id for {}ms", lastTimestamp - timestamp));
}
return timestamp; return timestamp;
} }