org.elasticsearch.index.engine

Class EngineConfig

java.lang.Object

org.elasticsearch.index.engine.EngineConfig

public final class EngineConfig
extends java.lang.Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	EngineConfig.OpenMode Engine open mode defines how the engine should be opened or in other words what the engine should expect to recover from.
static interface	EngineConfig.TranslogRecoveryRunner

Field Summary

Fields

Modifier and Type	Field and Description
static Setting<java.lang.String>	INDEX_CODEC_SETTING Index setting to change the low level lucene codec used for writing new segments.
static Setting<java.lang.Boolean>	INDEX_OPTIMIZE_AUTO_GENERATED_IDS Configures an index to optimize documents with auto generated ids for append only.

Constructor Summary

Constructors

Constructor and Description

EngineConfig(EngineConfig.OpenMode openMode, ShardId shardId, java.lang.String allocationId, ThreadPool threadPool, IndexSettings indexSettings, Engine.Warmer warmer, Store store, org.apache.lucene.index.MergePolicy mergePolicy, org.apache.lucene.analysis.Analyzer analyzer, org.apache.lucene.search.similarities.Similarity similarity, CodecService codecService, Engine.EventListener eventListener, org.apache.lucene.search.QueryCache queryCache, org.apache.lucene.search.QueryCachingPolicy queryCachingPolicy, boolean forceNewHistoryUUID, TranslogConfig translogConfig, TimeValue flushMergesAfter, java.util.List<org.apache.lucene.search.ReferenceManager.RefreshListener> refreshListeners, org.apache.lucene.search.Sort indexSort, EngineConfig.TranslogRecoveryRunner translogRecoveryRunner) Creates a new EngineConfig

Method Summary

Modifier and Type	Method and Description
java.lang.String	getAllocationId() Returns the allocation ID for the shard.
org.apache.lucene.analysis.Analyzer	getAnalyzer() Returns the analyzer as the default analyzer in the engines IndexWriter
org.apache.lucene.codecs.Codec	getCodec() Returns the Codec used in the engines IndexWriter
Engine.EventListener	getEventListener() Returns a listener that should be called on engine failure
TimeValue	getFlushMergesAfter() Returns a TimeValue at what time interval after the last write modification to the engine finished merges should be automatically flushed.
boolean	getForceNewHistoryUUID() Returns true if a new history uuid must be generated.
ByteSizeValue	getIndexingBufferSize() Returns the initial index buffer size.
IndexSettings	getIndexSettings() Returns the index settings for this index.
org.apache.lucene.search.Sort	getIndexSort() Return the sort order of this index, or null if the index has no sort.
org.apache.lucene.index.MergePolicy	getMergePolicy() Returns the MergePolicy for the engines IndexWriter
EngineConfig.OpenMode	getOpenMode() Returns the EngineConfig.OpenMode for this engine config.
org.apache.lucene.search.QueryCache	getQueryCache() Return the cache to use for queries.
org.apache.lucene.search.QueryCachingPolicy	getQueryCachingPolicy() Return the policy to use when caching queries.
java.util.List<org.apache.lucene.search.ReferenceManager.RefreshListener>	getRefreshListeners() The refresh listeners to add to Lucene
ShardId	getShardId() Returns the engines shard ID
org.apache.lucene.search.similarities.Similarity	getSimilarity() Returns the Similarity used for indexing and searching.
Store	getStore() Returns the Store instance that provides access to the Directory used for the engines IndexWriter to write it's index files to.
ThreadPool	getThreadPool() Returns a thread-pool mainly used to get estimated time stamps from ThreadPool.relativeTimeInMillis() and to schedule async force merge calls on the ThreadPool.Names.FORCE_MERGE thread-pool
TranslogConfig	getTranslogConfig() Returns the translog config for this engine
EngineConfig.TranslogRecoveryRunner	getTranslogRecoveryRunner() Returns a runner that implements the translog recovery from the given snapshot
Engine.Warmer	getWarmer() Returns an Engine.Warmer used to warm new searchers before they are used for searching.
boolean	isAutoGeneratedIDsOptimizationEnabled() returns true if the engine is allowed to optimize indexing operations with an auto-generated ID
boolean	isEnableGcDeletes() Returns true iff delete garbage collection in the engine should be enabled.
void	setEnableGcDeletes(boolean enableGcDeletes) Enables / disables gc deletes

Methods inherited from class java.lang.Object

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

Field Detail

INDEX_CODEC_SETTING

public static final Setting<java.lang.String> INDEX_CODEC_SETTING

Index setting to change the low level lucene codec used for writing new segments. This setting is not realtime updateable. This setting is also settable on the node and the index level, it's commonly used in hot/cold node archs where index is likely allocated on both `kind` of nodes.

INDEX_OPTIMIZE_AUTO_GENERATED_IDS

public static final Setting<java.lang.Boolean> INDEX_OPTIMIZE_AUTO_GENERATED_IDS

Configures an index to optimize documents with auto generated ids for append only. If this setting is updated from false to true might not take effect immediately. In other words, disabling the optimization will be immediately applied while re-enabling it might not be applied until the engine is in a safe state to do so. Depending on the engine implementation a change to this setting won't be reflected re-enabled optimization until the engine is restarted or the index is closed and reopened. The default is true

Constructor Detail

EngineConfig

public EngineConfig(EngineConfig.OpenMode openMode,
                    ShardId shardId,
                    java.lang.String allocationId,
                    ThreadPool threadPool,
                    IndexSettings indexSettings,
                    Engine.Warmer warmer,
                    Store store,
                    org.apache.lucene.index.MergePolicy mergePolicy,
                    org.apache.lucene.analysis.Analyzer analyzer,
                    org.apache.lucene.search.similarities.Similarity similarity,
                    CodecService codecService,
                    Engine.EventListener eventListener,
                    org.apache.lucene.search.QueryCache queryCache,
                    org.apache.lucene.search.QueryCachingPolicy queryCachingPolicy,
                    boolean forceNewHistoryUUID,
                    TranslogConfig translogConfig,
                    TimeValue flushMergesAfter,
                    java.util.List<org.apache.lucene.search.ReferenceManager.RefreshListener> refreshListeners,
                    org.apache.lucene.search.Sort indexSort,
                    EngineConfig.TranslogRecoveryRunner translogRecoveryRunner)

Creates a new EngineConfig

Method Detail

setEnableGcDeletes

public void setEnableGcDeletes(boolean enableGcDeletes)

Enables / disables gc deletes

See Also:

isEnableGcDeletes()

getIndexingBufferSize

public ByteSizeValue getIndexingBufferSize()

Returns the initial index buffer size. This setting is only read on startup and otherwise controlled by IndexingMemoryController

isEnableGcDeletes

public boolean isEnableGcDeletes()

Returns true iff delete garbage collection in the engine should be enabled. This setting is updateable in realtime and forces a volatile read. Consumers can safely read this value directly go fetch it's latest value. The default is true

Engine GC deletion if enabled collects deleted documents from in-memory realtime data structures after a certain amount of time (IndexSettings.getGcDeletesInMillis() if enabled. Before deletes are GCed they will cause re-adding the document that was deleted to fail.

getCodec

public org.apache.lucene.codecs.Codec getCodec()

Returns the Codec used in the engines IndexWriter

Note: this settings is only read on startup.

getThreadPool

public ThreadPool getThreadPool()

Returns a thread-pool mainly used to get estimated time stamps from ThreadPool.relativeTimeInMillis() and to schedule async force merge calls on the ThreadPool.Names.FORCE_MERGE thread-pool

getWarmer

public Engine.Warmer getWarmer()

Returns an Engine.Warmer used to warm new searchers before they are used for searching.

getStore

public Store getStore()

Returns the Store instance that provides access to the Directory used for the engines IndexWriter to write it's index files to.

Note: In order to use this instance the consumer needs to increment the stores reference before it's used the first time and hold it's reference until it's not needed anymore.

getMergePolicy

public org.apache.lucene.index.MergePolicy getMergePolicy()

Returns the MergePolicy for the engines IndexWriter

getEventListener

public Engine.EventListener getEventListener()

Returns a listener that should be called on engine failure

getIndexSettings

public IndexSettings getIndexSettings()

Returns the index settings for this index.

getShardId

public ShardId getShardId()

Returns the engines shard ID

getAllocationId

public java.lang.String getAllocationId()

Returns the allocation ID for the shard.

Returns:

the allocation ID

getAnalyzer

public org.apache.lucene.analysis.Analyzer getAnalyzer()

Returns the analyzer as the default analyzer in the engines IndexWriter

getSimilarity

public org.apache.lucene.search.similarities.Similarity getSimilarity()

Returns the Similarity used for indexing and searching.

getQueryCache

public org.apache.lucene.search.QueryCache getQueryCache()

Return the cache to use for queries.

getQueryCachingPolicy

public org.apache.lucene.search.QueryCachingPolicy getQueryCachingPolicy()

Return the policy to use when caching queries.

getTranslogConfig

public TranslogConfig getTranslogConfig()

Returns the translog config for this engine

getFlushMergesAfter

public TimeValue getFlushMergesAfter()

Returns a TimeValue at what time interval after the last write modification to the engine finished merges should be automatically flushed. This is used to free up transient disk usage of potentially large segments that are written after the engine became inactive from an indexing perspective.

getOpenMode

public EngineConfig.OpenMode getOpenMode()

Returns the EngineConfig.OpenMode for this engine config.

getForceNewHistoryUUID

public boolean getForceNewHistoryUUID()

Returns true if a new history uuid must be generated. If false, a new uuid will only be generated if no existing one is found.

getTranslogRecoveryRunner

public EngineConfig.TranslogRecoveryRunner getTranslogRecoveryRunner()

Returns a runner that implements the translog recovery from the given snapshot

getRefreshListeners

public java.util.List<org.apache.lucene.search.ReferenceManager.RefreshListener> getRefreshListeners()

The refresh listeners to add to Lucene

isAutoGeneratedIDsOptimizationEnabled

public boolean isAutoGeneratedIDsOptimizationEnabled()

returns true if the engine is allowed to optimize indexing operations with an auto-generated ID

getIndexSort

public org.apache.lucene.search.Sort getIndexSort()

Return the sort order of this index, or null if the index has no sort.