public class TimestampGenerator extends Object
| Modifier and Type | Field and Description | 
|---|---|
| static long | TS_MULTIPLIER | 
| Constructor and Description | 
|---|
| TimestampGenerator() | 
| Modifier and Type | Method and Description | 
|---|---|
| long | currentTime()Returns the current wall clock time in milliseconds, multiplied by the
 required precision. | 
| static long | getSupplementedTimestamp(long incomingTS,
                        String appId)Returns a timestamp multiplied with TS_MULTIPLIER and last few digits of
 application id. | 
| static long | getTruncatedTimestamp(long incomingTS)truncates the last few digits of the timestamp which were supplemented by
 the TimestampGenerator#getSupplementedTimestamp function. | 
| long | getUniqueTimestamp()Returns a timestamp value unique within the scope of this
  TimestampGeneratorinstance. | 
public static final long TS_MULTIPLIER
public long currentTime()
public long getUniqueTimestamp()
TimestampGenerator instance. For usage by HBase
 RegionObserver coprocessors, this normally means unique within a
 given region.
 Unlikely scenario of generating a non-unique timestamp: if there is a
 sustained rate of more than 1M hbase writes per second AND if region fails
 over within that time range of timestamps being generated then there may be
 collisions writing to a cell version of the same column.public static long getSupplementedTimestamp(long incomingTS,
                                            String appId)
incomingTS - Timestamp to be converted.appId - Application Id.public static long getTruncatedTimestamp(long incomingTS)
incomingTS - Timestamp to be truncated.Copyright © 2008–2023 Apache Software Foundation. All rights reserved.