org.apache.cassandra.db

Class RangeTombstoneList

java.lang.Object

org.apache.cassandra.db.RangeTombstoneList

All Implemented Interfaces:

java.lang.Iterable<RangeTombstone>, IMeasurableMemory

public class RangeTombstoneList
extends java.lang.Object
implements java.lang.Iterable<RangeTombstone>, IMeasurableMemory

Data structure holding the range tombstones of a ColumnFamily.

This is essentially a sorted list of non-overlapping (tombstone) ranges.

A range tombstone has 4 elements: the start and end of the range covered, and the deletion infos (markedAt timestamp and local deletion time). The markedAt timestamp is what define the priority of 2 overlapping tombstones. That is, given 2 tombstones [0, 10]@t1 and [5, 15]@t2, then if t2 > t1 (and are the tombstones markedAt values), the 2nd tombstone take precedence over the first one on [5, 10]. If such tombstones are added to a RangeTombstoneList, the range tombstone list will store them as [[0, 5]@t1, [5, 15]@t2].

The only use of the local deletion time is to know when a given tombstone can be purged, which will be done by the purge() method.

Constructor Summary

Constructors

Constructor and Description
RangeTombstoneList(ClusteringComparator comparator, int capacity)

Method Summary

Modifier and Type	Method and Description
void	add(ClusteringBound start, ClusteringBound end, long markedAt, int delTime) Adds a new range tombstone.
void	add(RangeTombstone tombstone)
void	addAll(RangeTombstoneList tombstones) Adds all the range tombstones of tombstones to this RangeTombstoneList.
void	collectStats(EncodingStats.Collector collector)
ClusteringComparator	comparator()
RangeTombstoneList	copy()
RangeTombstoneList	copy(AbstractAllocator allocator)
int	dataSize()
boolean	equals(java.lang.Object o)
int	hashCode()
boolean	isDeleted(Clustering clustering, Cell cell) Returns whether the given name/timestamp pair is deleted by one of the tombstone of this RangeTombstoneList.
boolean	isEmpty()
java.util.Iterator<RangeTombstone>	iterator()
java.util.Iterator<RangeTombstone>	iterator(boolean reversed)
java.util.Iterator<RangeTombstone>	iterator(Slice slice, boolean reversed)
long	maxMarkedAt()
RangeTombstone	search(Clustering name)
DeletionTime	searchDeletionTime(Clustering name) Returns the DeletionTime for the tombstone overlapping name (there can't be more than one), or null if name is not covered by any tombstone.
int	size()
long	unsharedHeapSize()
void	updateAllTimestamp(long timestamp)

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Detail

RangeTombstoneList

public RangeTombstoneList(ClusteringComparator comparator,
                          int capacity)

Method Detail

isEmpty

public boolean isEmpty()

size

public int size()

comparator

public ClusteringComparator comparator()

copy

public RangeTombstoneList copy()

copy

public RangeTombstoneList copy(AbstractAllocator allocator)

add

public void add(RangeTombstone tombstone)

add

public void add(ClusteringBound start,
                ClusteringBound end,
                long markedAt,
                int delTime)

Adds a new range tombstone. This method will be faster if the new tombstone sort after all the currently existing ones (this is a common use case), but it doesn't assume it.

addAll

public void addAll(RangeTombstoneList tombstones)

Adds all the range tombstones of tombstones to this RangeTombstoneList.

isDeleted

public boolean isDeleted(Clustering clustering,
                         Cell cell)

Returns whether the given name/timestamp pair is deleted by one of the tombstone of this RangeTombstoneList.

searchDeletionTime

public DeletionTime searchDeletionTime(Clustering name)

Returns the DeletionTime for the tombstone overlapping name (there can't be more than one), or null if name is not covered by any tombstone.

search

public RangeTombstone search(Clustering name)

dataSize

public int dataSize()

maxMarkedAt

public long maxMarkedAt()

collectStats

public void collectStats(EncodingStats.Collector collector)

updateAllTimestamp

public void updateAllTimestamp(long timestamp)

iterator

public java.util.Iterator<RangeTombstone> iterator()

Specified by:

iterator in interface java.lang.Iterable<RangeTombstone>

iterator

public java.util.Iterator<RangeTombstone> iterator(boolean reversed)

iterator

public java.util.Iterator<RangeTombstone> iterator(Slice slice,
                                                   boolean reversed)

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public final int hashCode()

Overrides:

hashCode in class java.lang.Object

unsharedHeapSize

public long unsharedHeapSize()

Specified by:

unsharedHeapSize in interface IMeasurableMemory

Returns:

the amount of on-heap memory retained by the object that might be reclaimed if the object were reclaimed, i.e. it should try to exclude globally cached data where possible, or counting portions of arrays that are referenced by the object but used by other objects only (e.g. slabbed byte-buffers), etc.