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HHH-18377 - Support for uuid v6 and v7 generated ids #9008

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Merged
merged 1 commit into from
Sep 24, 2024
Merged

HHH-18377 - Support for uuid v6 and v7 generated ids #9008

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10 changes: 4 additions & 6 deletions hibernate-core/src/main/java/org/hibernate/id/uuid/UuidVersion6Strategy.java
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Original file line number Diff line number Diff line change
Expand Up @@ -36,15 +36,13 @@
* @author Cedomir Igaly
*/
public class UuidVersion6Strategy implements UUIDGenerationStrategy, UuidValueGenerator {

public static final UuidVersion6Strategy INSTANCE = new UuidVersion6Strategy();

private static final Instant EPOCH_1582 = LocalDate.of( 1582, 10, 15 )
.atStartOfDay( ZoneId.of( "UTC" ) )
.toInstant();

private static class Holder {
static final SecureRandom numberGenerator = new SecureRandom();
static final Instant EPOCH_1582 = LocalDate.of( 1582, 10, 15 )
.atStartOfDay( ZoneId.of( "UTC" ) )
.toInstant();
}

private final Lock lock = new ReentrantLock( true );
Expand Down Expand Up @@ -112,7 +110,7 @@ private long getSequence(final long currentTimestamp) {
}

private static long getCurrentTimestamp() {
final Duration duration = Duration.between( EPOCH_1582, Instant.now() );
final Duration duration = Duration.between( Holder.EPOCH_1582, Instant.now() );
return duration.toSeconds() * 10_000_000 + duration.toNanosPart() / 100;
}
}
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