Package org.apache.hadoop.yarn.server.timelineservice.storage.common

Class HBaseTimelineStorageUtils

java.lang.Object

org.apache.hadoop.yarn.server.timelineservice.storage.common.HBaseTimelineStorageUtils

public final class HBaseTimelineStorageUtils
extends Object

A bunch of utility functions used in HBase TimelineService backend.

Method Summary

Modifier and Type	Method	Description
static byte[]	calculateTheClosestNextRowKeyForPrefix(byte[] rowKeyPrefix)	Given a row key prefix stored in a byte array, return a byte array for its immediate next row key.
static org.apache.hadoop.conf.Configuration	getTimelineServiceHBaseConf(org.apache.hadoop.conf.Configuration conf)
static void	setMetricsTimeRange(org.apache.hadoop.hbase.client.Query query, byte[] metricsCf, long tsBegin, long tsEnd)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

getTimelineServiceHBaseConf

public static org.apache.hadoop.conf.Configuration getTimelineServiceHBaseConf(org.apache.hadoop.conf.Configuration conf)
                                                                        throws IOException

Parameters:

conf - YARN configuration. Used to see if there is an explicit config pointing to the HBase config file to read. It should not be null or a NullPointerException will be thrown.

Returns:

a configuration with the HBase configuration from the classpath, optionally overwritten by the timeline service configuration URL if specified.

Throws:

IOException - if a timeline service HBase configuration URL is specified but unable to read it.

calculateTheClosestNextRowKeyForPrefix

public static byte[] calculateTheClosestNextRowKeyForPrefix(byte[] rowKeyPrefix)

Given a row key prefix stored in a byte array, return a byte array for its immediate next row key.

Parameters:

rowKeyPrefix - The provided row key prefix, represented in an array.

Returns:

the closest next row key of the provided row key.

setMetricsTimeRange

public static void setMetricsTimeRange(org.apache.hadoop.hbase.client.Query query,
 byte[] metricsCf,
 long tsBegin,
 long tsEnd)