org.argeo.api.acr/src/org/argeo/api/acr/uuid/TimeUuidState.java

   1 package org.argeo.api.acr.uuid;
   2
   3 import java.time.Instant;
   4 import java.time.ZoneOffset;
   5 import java.time.ZonedDateTime;
   6
   7 /**
   8  * The state of a time based UUID generator, as described and discussed in
   9  * section 4.2.1 of RFC4122.
  10  *
  11  * @see https://datatracker.ietf.org/doc/html/rfc4122#section-4.2.1
  12  */
  13 public interface TimeUuidState {
  14
  15         /** Start of the Gregorian time, used by time-based UUID (v1). */
  16         final static Instant GREGORIAN_START = ZonedDateTime.of(1582, 10, 15, 0, 0, 0, 0, ZoneOffset.UTC).toInstant();
  17
  18         byte[] getNodeId();
  19
  20         long useTimestamp();
  21
  22         long getClockSequence();
  23
  24         static boolean isNoMacAddressNodeId(byte[] nodeId) {
  25                 return (nodeId[0] & 1) != 0;
  26         }
  27
  28         static class Holder {
  29                 byte[] nodeId = new byte[6];
  30                 long lastTimestamp;
  31                 long clockSequence;
  32
  33                 public byte[] getNodeId() {
  34                         return nodeId;
  35                 }
  36
  37                 public void setNodeId(byte[] nodeId) {
  38                         this.nodeId = nodeId;
  39                 }
  40
  41                 public long getLastTimestamp() {
  42                         return lastTimestamp;
  43                 }
  44
  45                 public void setLastTimestamp(long lastTimestamp) {
  46                         this.lastTimestamp = lastTimestamp;
  47                 }
  48
  49                 public long getClockSequence() {
  50                         return clockSequence;
  51                 }
  52
  53                 public void setClockSequence(long clockSequence) {
  54                         this.clockSequence = clockSequence;
  55                 }
  56
  57         }
  58 }