org.apache.cassandra.dht
Class CollatingOrderPreservingPartitioner

java.lang.Object
  org.apache.cassandra.dht.AbstractByteOrderedPartitioner
      org.apache.cassandra.dht.CollatingOrderPreservingPartitioner

All Implemented Interfaces:

IPartitioner<BytesToken>

public class CollatingOrderPreservingPartitioner
extends AbstractByteOrderedPartitioner

Field Summary

Fields inherited from class org.apache.cassandra.dht.AbstractByteOrderedPartitioner

BYTE_MASK, MINIMUM

Constructor Summary

CollatingOrderPreservingPartitioner()

Method Summary

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.
BytesToken	getToken(java.nio.ByteBuffer key)

Methods inherited from class org.apache.cassandra.dht.AbstractByteOrderedPartitioner

convertFromDiskFormat, decorateKey, getMinimumToken, getRandomToken, getTokenFactory, midpoint, preservesOrder

Methods inherited from class java.lang.Object

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

Constructor Detail

CollatingOrderPreservingPartitioner

public CollatingOrderPreservingPartitioner()

Method Detail

getToken

public BytesToken getToken(java.nio.ByteBuffer key)

Specified by:

getToken in interface IPartitioner<BytesToken>

Specified by:

getToken in class AbstractByteOrderedPartitioner

Returns:

a Token that can be used to route a given key (This is NOT a method to create a Token from its string representation; for that, use TokenFactory.fromString.)

describeOwnership

public java.util.Map<Token,java.lang.Float> describeOwnership(java.util.List<Token> sortedTokens)

Description copied from interface: IPartitioner

Calculate the deltas between tokens in the ring in order to compare relative sizes.

Parameters:

sortedTokens - a sorted List of Tokens

Returns:

the mapping from 'token' to 'percentage of the ring owned by that token'.