ai.grakn.engine.task.postprocessing

Class IndexPostProcessor

java.lang.Object

ai.grakn.engine.task.postprocessing.IndexPostProcessor

public class IndexPostProcessor
extends Object

Class responsible for merging duplicate Attributes which may result from creating Attributes in a concurrent environment

Author:

Filipe Peliz Pinto Teixeira

Method Summary

Modifier and Type	Method and Description
static IndexPostProcessor	create(LockProvider lockProvider, IndexStorage redisIndexStorage)
void	mergeDuplicateConcepts(EmbeddedGraknTx<?> tx, String conceptIndex, Set<ai.grakn.concept.ConceptId> conceptIds) Merges duplicate Concepts based on the unique index provided plus the ConceptIds of the suspected duplicates
Set<ai.grakn.concept.ConceptId>	popIds(ai.grakn.Keyspace keyspace, String index)
String	popIndex(ai.grakn.Keyspace keyspace)
void	updateIndices(ai.grakn.kb.log.CommitLog commitLog) Adds all the new Attributes of a CommitLog to IndexStorage for storage.

Methods inherited from class java.lang.Object

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

Method Detail

create

public static IndexPostProcessor create(LockProvider lockProvider,
                                        IndexStorage redisIndexStorage)

popIndex

public String popIndex(ai.grakn.Keyspace keyspace)

popIds

public Set<ai.grakn.concept.ConceptId> popIds(ai.grakn.Keyspace keyspace,
                                              String index)

updateIndices

public void updateIndices(ai.grakn.kb.log.CommitLog commitLog)

Adds all the new Attributes of a CommitLog to IndexStorage for storage. This data will be retrieved later and post processed.

Parameters:

commitLog - The CommitLog which contains the new Attributes to post process

mergeDuplicateConcepts

public void mergeDuplicateConcepts(EmbeddedGraknTx<?> tx,
                                   String conceptIndex,
                                   Set<ai.grakn.concept.ConceptId> conceptIds)

Merges duplicate Concepts based on the unique index provided plus the ConceptIds of the suspected duplicates

Parameters:

tx - The GraknTx responsible for performing the merge

conceptIndex - The unique Concept index which is supposed to exist only once across the entire DB.

conceptIds - The ConceptIds of the suspected duplicates