Module org.elasticsearch.server

Package org.elasticsearch.index.engine

Class LuceneSyntheticSourceChangesSnapshot

java.lang.Object

org.elasticsearch.index.engine.SearchBasedChangesSnapshot

org.elasticsearch.index.engine.LuceneSyntheticSourceChangesSnapshot

All Implemented Interfaces:

Closeable, AutoCloseable, Translog.Snapshot

public class LuceneSyntheticSourceChangesSnapshot
extends SearchBasedChangesSnapshot

A SearchBasedChangesSnapshot that utilizes a synthetic field loader to rebuild the recovery source. This snapshot is activated when IndexSettings.RECOVERY_USE_SYNTHETIC_SOURCE_SETTING is enabled on the underlying index. The maxMemorySizeInBytes parameter limits the total size of uncompressed _sources loaded into memory during batch retrieval.

Field Summary

Fields inherited from class org.elasticsearch.index.engine.SearchBasedChangesSnapshot

DEFAULT_BATCH_SIZE, fromSeqNo, requiredFullRange, searchBatchSize, toSeqNo

Fields inherited from interface org.elasticsearch.index.translog.Translog.Snapshot

EMPTY

Constructor Summary

Constructors

Constructor	Description
LuceneSyntheticSourceChangesSnapshot(MapperService mapperService, Engine.Searcher engineSearcher, int searchBatchSize, long maxMemorySizeInBytes, long fromSeqNo, long toSeqNo, boolean requiredFullRange, boolean accessStats, IndexVersion indexVersionCreated)

Method Summary

Modifier and Type	Method	Description
protected Translog.Operation	nextOperation()	Abstract method for retrieving the next operation.
int	skippedOperations()	The number of operations have been skipped (overridden or trimmed) in the snapshot so far.

Methods inherited from class org.elasticsearch.index.engine.SearchBasedChangesSnapshot

addSourceMetadata, assertDocSoftDeleted, close, leaves, next, nextTopDocs, setNextSourceMetadataReader, totalOperations

Methods inherited from class java.lang.Object

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

Constructor Details

LuceneSyntheticSourceChangesSnapshot

public LuceneSyntheticSourceChangesSnapshot(MapperService mapperService,
 Engine.Searcher engineSearcher,
 int searchBatchSize,
 long maxMemorySizeInBytes,
 long fromSeqNo,
 long toSeqNo,
 boolean requiredFullRange,
 boolean accessStats,
 IndexVersion indexVersionCreated)
                                     throws IOException

Throws:

IOException

Method Details

skippedOperations

public int skippedOperations()

Description copied from interface: Translog.Snapshot

The number of operations have been skipped (overridden or trimmed) in the snapshot so far. Unlike Translog.Snapshot.totalOperations(), this value is updated each time after Translog.Snapshot.next()) is called.

nextOperation

protected Translog.Operation nextOperation()
                                    throws IOException

Description copied from class: SearchBasedChangesSnapshot

Abstract method for retrieving the next operation. Should be implemented by subclasses.

Specified by:

nextOperation in class SearchBasedChangesSnapshot

Returns:

The next Translog.Operation in the snapshot.

Throws:

IOException - If an I/O error occurs.