org.janusgraph.diskstorage.indexing

Class IndexMutation

java.lang.Object

org.janusgraph.diskstorage.Mutation<IndexEntry,IndexEntry>

org.janusgraph.diskstorage.indexing.IndexMutation

public class IndexMutation
extends Mutation<IndexEntry,IndexEntry>

An index mutation contains the field updates (additions and deletions) for a particular index entry. In addition it maintains two boolean values: 1) isNew - the entry is newly created, 2) isDeleted - the entire entry is being deleted. These can be used by an IndexProvider to execute updates more efficiently.

Author:

Matthias Broecheler (me@matthiasb.com)

Constructor Summary

Constructors

Constructor and Description
IndexMutation(KeyInformation.StoreRetriever storeRetriever, boolean isNew, boolean isDeleted)
IndexMutation(KeyInformation.StoreRetriever storeRetriever, List<IndexEntry> additions, List<IndexEntry> deletions, boolean isNew, boolean isDeleted)

Method Summary

Modifier and Type	Method and Description
void	consolidate()
int	determineTTL()
static int	determineTTL(List<IndexEntry> additions)
boolean	isConsolidated()
boolean	isDeleted()
boolean	isNew()
void	merge(IndexMutation m)
void	resetDelete()

Methods inherited from class org.janusgraph.diskstorage.Mutation

addition, consolidate, deletion, getAdditions, getDeletions, getTotalMutations, hasAdditions, hasDeletions, isConsolidated, isEmpty, merge

Methods inherited from class java.lang.Object

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

Constructor Detail

IndexMutation

public IndexMutation(KeyInformation.StoreRetriever storeRetriever,
                     List<IndexEntry> additions,
                     List<IndexEntry> deletions,
                     boolean isNew,
                     boolean isDeleted)

IndexMutation

public IndexMutation(KeyInformation.StoreRetriever storeRetriever,
                     boolean isNew,
                     boolean isDeleted)

Method Detail

merge

public void merge(IndexMutation m)

isNew

public boolean isNew()

isDeleted

public boolean isDeleted()

resetDelete

public void resetDelete()

consolidate

public void consolidate()

Specified by:

consolidate in class Mutation<IndexEntry,IndexEntry>

isConsolidated

public boolean isConsolidated()

Specified by:

isConsolidated in class Mutation<IndexEntry,IndexEntry>

determineTTL

public int determineTTL()

determineTTL

public static int determineTTL(List<IndexEntry> additions)