org.apache.hadoop.hbase.io.hfile

Class RandomKeyValueUtil

java.lang.Object

org.apache.hadoop.hbase.io.hfile.RandomKeyValueUtil

public class RandomKeyValueUtil
extends Object

These helper methods generate random byte[]'s data for KeyValues

Field Summary

Fields

Modifier and Type	Field and Description
static String	COLUMN_FAMILY_NAME
private static int	MAX_ROW_OR_QUALIFIER_LENGTH
private static int	MIN_ROW_OR_QUALIFIER_LENGTH

Constructor Summary

Constructors

Constructor and Description
RandomKeyValueUtil()

Method Summary

Modifier and Type	Method and Description
static byte[]	randomFixedLengthValue(Random rand, int valueLength)
static org.apache.hadoop.hbase.KeyValue	randomKeyValue(Random rand)
static byte[]	randomOrderedFixedLengthKey(Random rand, int i, int suffixLength)
static byte[]	randomOrderedKey(Random rand, int i) Generates a random key that is guaranteed to increase as the given index i increases.
static char	randomReadableChar(Random rand)
static byte[]	randomRowOrQualifier(Random rand)
static byte[]	randomValue(Random rand)

Methods inherited from class java.lang.Object

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

Field Detail

COLUMN_FAMILY_NAME

public static final String COLUMN_FAMILY_NAME

See Also:

Constant Field Values

MIN_ROW_OR_QUALIFIER_LENGTH

private static final int MIN_ROW_OR_QUALIFIER_LENGTH

See Also:

Constant Field Values

MAX_ROW_OR_QUALIFIER_LENGTH

private static final int MAX_ROW_OR_QUALIFIER_LENGTH

See Also:

Constant Field Values

Constructor Detail

RandomKeyValueUtil

public RandomKeyValueUtil()

Method Detail

randomReadableChar

public static final char randomReadableChar(Random rand)

randomKeyValue

public static org.apache.hadoop.hbase.KeyValue randomKeyValue(Random rand)

randomRowOrQualifier

public static byte[] randomRowOrQualifier(Random rand)

randomValue

public static byte[] randomValue(Random rand)

randomOrderedKey

public static byte[] randomOrderedKey(Random rand,
                                      int i)

Generates a random key that is guaranteed to increase as the given index i increases. The result consists of a prefix, which is a deterministic increasing function of i, and a random suffix.

Parameters:

rand - random number generator to use

i -

Returns:

the random key

randomOrderedFixedLengthKey

public static byte[] randomOrderedFixedLengthKey(Random rand,
                                                 int i,
                                                 int suffixLength)

randomFixedLengthValue

public static byte[] randomFixedLengthValue(Random rand,
                                            int valueLength)