public class RandomPartitioner extends java.lang.Object implements IPartitioner
| Modifier and Type | Class and Description |
|---|---|
static class |
RandomPartitioner.BigIntegerToken |
| Modifier and Type | Field and Description |
|---|---|
static RandomPartitioner |
instance |
static java.math.BigInteger |
MAXIMUM |
static RandomPartitioner.BigIntegerToken |
MINIMUM |
static AbstractType<?> |
partitionOrdering |
static java.math.BigInteger |
ZERO |
| Constructor and Description |
|---|
RandomPartitioner() |
| Modifier and Type | Method and Description |
|---|---|
DecoratedKey |
decorateKey(java.nio.ByteBuffer key)
Transform key to object representation of the on-disk format.
|
java.util.Map<Token,java.lang.Float> |
describeOwnership(java.util.List<Token> sortedTokens)
Calculate the deltas between tokens in the ring in order to compare
relative sizes.
|
Token |
getMaximumToken()
The biggest token for this partitioner, unlike getMinimumToken, this token is actually used and users wanting to
include all tokens need to do getMaximumToken().maxKeyBound()
Not implemented for the ordered partitioners
|
RandomPartitioner.BigIntegerToken |
getMinimumToken() |
RandomPartitioner.BigIntegerToken |
getRandomToken() |
RandomPartitioner.BigIntegerToken |
getRandomToken(java.util.Random random) |
RandomPartitioner.BigIntegerToken |
getToken(java.nio.ByteBuffer key) |
Token.TokenFactory |
getTokenFactory() |
AbstractType<?> |
getTokenValidator() |
Token |
midpoint(Token ltoken,
Token rtoken)
Calculate a Token representing the approximate "middle" of the given
range.
|
AbstractType<?> |
partitionOrdering()
Abstract type that orders the same way as DecoratedKeys provided by this partitioner.
|
boolean |
preservesOrder() |
Token |
split(Token ltoken,
Token rtoken,
double ratioToLeft)
Calculate a Token which take approximate 0 <= ratioToLeft <= 1 ownership of the given range.
|
java.util.Optional<Splitter> |
splitter() |
public static final java.math.BigInteger ZERO
public static final RandomPartitioner.BigIntegerToken MINIMUM
public static final java.math.BigInteger MAXIMUM
public static final RandomPartitioner instance
public static final AbstractType<?> partitionOrdering
public DecoratedKey decorateKey(java.nio.ByteBuffer key)
IPartitionerdecorateKey in interface IPartitionerkey - the raw, client-facing keypublic Token midpoint(Token ltoken, Token rtoken)
IPartitionermidpoint in interface IPartitionerpublic Token split(Token ltoken, Token rtoken, double ratioToLeft)
IPartitionersplit in interface IPartitionerpublic RandomPartitioner.BigIntegerToken getMinimumToken()
getMinimumToken in interface IPartitionerpublic RandomPartitioner.BigIntegerToken getRandomToken()
getRandomToken in interface IPartitionerpublic RandomPartitioner.BigIntegerToken getRandomToken(java.util.Random random)
getRandomToken in interface IPartitionerrandom - instance of Random to use when generating the tokenpublic Token.TokenFactory getTokenFactory()
getTokenFactory in interface IPartitionerpublic boolean preservesOrder()
preservesOrder in interface IPartitionerpublic RandomPartitioner.BigIntegerToken getToken(java.nio.ByteBuffer key)
getToken in interface IPartitionerpublic java.util.Map<Token,java.lang.Float> describeOwnership(java.util.List<Token> sortedTokens)
IPartitionerdescribeOwnership in interface IPartitionersortedTokens - a sorted List of Tokenspublic Token getMaximumToken()
IPartitionergetMaximumToken in interface IPartitionerpublic AbstractType<?> getTokenValidator()
getTokenValidator in interface IPartitionerpublic AbstractType<?> partitionOrdering()
IPartitionerpartitionOrdering in interface IPartitionerpublic java.util.Optional<Splitter> splitter()
splitter in interface IPartitionerCopyright © 2018 The Apache Software Foundation