org.apache.cassandra.utils

Class MerkleTrees

java.lang.Object

org.apache.cassandra.utils.MerkleTrees

All Implemented Interfaces:

java.lang.Iterable<java.util.Map.Entry<Range<Token>,MerkleTree>>

public class MerkleTrees
extends java.lang.Object
implements java.lang.Iterable<java.util.Map.Entry<Range<Token>,MerkleTree>>

Wrapper class for handling of multiple MerkleTrees at once. The MerkleTree's are divided in Ranges of non-overlapping tokens.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	MerkleTrees.MerkleTreesSerializer
class	MerkleTrees.TreeRangeIterator

Field Summary

Fields

Modifier and Type	Field and Description
static MerkleTrees.MerkleTreesSerializer	serializer

Constructor Summary

Constructors

Constructor and Description
MerkleTrees(IPartitioner partitioner) Creates empty MerkleTrees object.

Method Summary

Modifier and Type	Method and Description
MerkleTree	addMerkleTree(int maxsize, byte hashdepth, Range<Token> range)
MerkleTree	addMerkleTree(int maxsize, Range<Token> range) Add a MerkleTree with the defined size and range.
void	addMerkleTrees(int maxsize, java.util.Collection<Range<Token>> ranges) Add merkle tree's with the defined maxsize and ranges.
static java.util.List<Range<Token>>	difference(MerkleTrees ltree, MerkleTrees rtree) Get the differences between the two sets of MerkleTrees.
MerkleTree.TreeRange	get(Token t) Get the MerkleTree.Range responsible for the given token.
MerkleTree	getMerkleTree(Range<Token> range) Get the MerkleTree responsible for the given token range.
byte[]	hash(Range<Token> range)
void	init() Init all MerkleTree's with an even tree distribution.
void	init(Range<Token> range) Init a selected MerkleTree with an even tree distribution.
void	invalidate(Token t) Invalidate the MerkleTree responsible for the given token.
java.util.Iterator<java.util.Map.Entry<Range<Token>,MerkleTree>>	iterator() Get an iterator of all ranges and their MerkleTrees.
void	logRowCountPerLeaf(org.slf4j.Logger logger) Log the row count per leaf for all MerkleTrees.
void	logRowSizePerLeaf(org.slf4j.Logger logger) Log the row size per leaf for all MerkleTrees.
void	maxsize(Range<Token> range, int maxsize)
IPartitioner	partitioner() Get the partitioner in use.
MerkleTrees.TreeRangeIterator	rangeIterator() Get an iterator for all the iterator generated by the MerkleTrees.
java.util.Collection<Range<Token>>	ranges() Get the ranges that these merkle trees covers.
void	release() Dereference all merkle trees and release direct memory for all off-heap trees.
long	rowCount()
long	size()
boolean	split(Token t) Split the MerkleTree responsible for the given token.
MerkleTrees	tryMoveOffHeap()

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Field Detail

serializer

public static final MerkleTrees.MerkleTreesSerializer serializer

Constructor Detail

MerkleTrees

public MerkleTrees(IPartitioner partitioner)

Creates empty MerkleTrees object.

Parameters:

partitioner - The partitioner to use

Method Detail

ranges

public java.util.Collection<Range<Token>> ranges()

Get the ranges that these merkle trees covers.

Returns:

partitioner

public IPartitioner partitioner()

Get the partitioner in use.

Returns:

addMerkleTrees

public void addMerkleTrees(int maxsize,
                           java.util.Collection<Range<Token>> ranges)

Add merkle tree's with the defined maxsize and ranges.

Parameters:

maxsize -

ranges -

addMerkleTree

public MerkleTree addMerkleTree(int maxsize,
                                Range<Token> range)

Add a MerkleTree with the defined size and range.

Parameters:

maxsize -

range -

Returns:

The created merkle tree.

addMerkleTree

public MerkleTree addMerkleTree(int maxsize,
                                byte hashdepth,
                                Range<Token> range)

get

public MerkleTree.TreeRange get(Token t)

Get the MerkleTree.Range responsible for the given token.

Parameters:

t -

Returns:

init

public void init()

Init all MerkleTree's with an even tree distribution.

release

public void release()

Dereference all merkle trees and release direct memory for all off-heap trees.

init

public void init(Range<Token> range)

Init a selected MerkleTree with an even tree distribution.

Parameters:

range -

split

public boolean split(Token t)

Split the MerkleTree responsible for the given token.

Parameters:

t -

Returns:

invalidate

public void invalidate(Token t)

Invalidate the MerkleTree responsible for the given token.

Parameters:

t -

getMerkleTree

public MerkleTree getMerkleTree(Range<Token> range)

Get the MerkleTree responsible for the given token range.

Parameters:

range -

Returns:

size

public long size()

maxsize

public void maxsize(Range<Token> range,
                    int maxsize)

rangeIterator

public MerkleTrees.TreeRangeIterator rangeIterator()

Get an iterator for all the iterator generated by the MerkleTrees.

Returns:

logRowCountPerLeaf

public void logRowCountPerLeaf(org.slf4j.Logger logger)

Log the row count per leaf for all MerkleTrees.

Parameters:

logger -

logRowSizePerLeaf

public void logRowSizePerLeaf(org.slf4j.Logger logger)

Log the row size per leaf for all MerkleTrees.

Parameters:

logger -

hash

public byte[] hash(Range<Token> range)

iterator

public java.util.Iterator<java.util.Map.Entry<Range<Token>,MerkleTree>> iterator()

Get an iterator of all ranges and their MerkleTrees.

Specified by:

iterator in interface java.lang.Iterable<java.util.Map.Entry<Range<Token>,MerkleTree>>

rowCount

public long rowCount()

tryMoveOffHeap

public MerkleTrees tryMoveOffHeap()
                           throws java.io.IOException

Returns:

a new MerkleTrees instance with all trees moved off heap.

Throws:

java.io.IOException

difference

public static java.util.List<Range<Token>> difference(MerkleTrees ltree,
                                                      MerkleTrees rtree)

Get the differences between the two sets of MerkleTrees.

Parameters:

ltree -

rtree -

Returns: