All Classes

Class	Description
AbstractBackupRepository	Abstract BackupRepository implementation providing some logic shared between real implementations.
AbstractDefaultValueUpdateProcessorFactory	Base class that can be extended by any UpdateRequestProcessorFactory designed to add a default value to the document in an AddUpdateCommand when that field is not already specified.
AbstractEnumField	Abstract Field type for support of string values with custom sort order.
AbstractEnumField.EnumMapping	Models all the info contained in an enums config XML file
AbstractLuceneSpellChecker	Abstract base class for all Lucene-based spell checking implementations.
AbstractPluginLoader<T>	An abstract super class that manages standard solr-style plugin configuration.
AbstractReRankQuery
AbstractSolrEventListener
AbstractSpatialFieldType<T extends org.apache.lucene.spatial.SpatialStrategy>	Abstract base class for Solr FieldTypes based on a Lucene 4 SpatialStrategy.
AbstractSpatialPrefixTreeFieldType<T extends org.apache.lucene.spatial.prefix.PrefixTreeStrategy>
AbstractSSLCredentialProvider	Abstract provider with default implementation
AbstractSubTypeFieldType	An abstract base class for FieldTypes that delegate work to another FieldType.
ActionThrottle
ActiveReplicaWatcher	Watch for replicas to become Replica.State.ACTIVE.
ActiveTasksListComponent	List the active tasks that can be cancelled
ActiveTasksListHandler	Handles request for listing all active cancellable tasks
AddReplicaCmd
AddReplicaCmd.CreateReplica	A data structure to keep all information required to create a new replica in one place.
AddReplicaProperty	V2 API for adding a property to a collection replica
AddressUtils	Simple utilities for working Hostname/IP Addresses
AddSchemaFieldsUpdateProcessorFactory	This processor will dynamically add fields to the schema if an input document contains one or more fields that don't match any field or dynamic field in the schema.
AddUpdateCommand	An UpdateCommand for adding or updating one document.
AdjustableSemaphore
AdminAPIBase	A common parent for "admin" (i.e.
AdminHandlersProxy	Static methods to proxy calls to an Admin (GET) API to other nodes in the cluster and return a combined response
AffinityPlacementConfig	Configuration bean for AffinityPlacementFactory.
AffinityPlacementFactory	This factory is instantiated by config from its class name.
AffinityPlacementFactory.AffinityPlacementPlugin	See AffinityPlacementFactory for instructions on how to configure a cluster to use this plugin and details on what the plugin does.
AggregateBackupStats	Aggregate stats from multiple ShardBackupMetadata
AggregateMetric	This class is used for keeping several partial named values and providing useful statistics over them.
AggregateMetric.Update	Simple class to represent current value and how many times it was set.
AggUtil
AggValueSource
AliasProperty	V2 APIs for managing and inspecting properties for collection aliases
AllCoresStatusAPI	V2 API for retrieving status information for all cores on the receiving node.
AllowListUrlChecker	Validates URLs based on an allow list or a ClusterState in SolrCloud.
AllValuesOrNoneFieldMutatingUpdateProcessor	Abstract subclass of FieldMutatingUpdateProcessor for implementing UpdateProcessors that will mutate all individual values of a selected field independently.
AltBufferPoolMetricSet	This is an alternative implementation of BufferPoolMetricSet that doesn't need an MBean server.
AnalysisRequestHandlerBase	A base class for all analysis request handlers.
AnalysisRequestHandlerBase.AnalysisContext	Serves as the context of an analysis process.
AnalysisRequestHandlerBase.ListBasedTokenStream	TokenStream that iterates over a list of pre-existing Tokens
AnalysisRequestHandlerBase.TokenTrackingAttribute	This is an Attribute used to track the positions of tokens in the analysis chain.
AnalysisRequestHandlerBase.TokenTrackingAttributeImpl	Implementation of AnalysisRequestHandlerBase.TokenTrackingAttribute.
AnalyticsQuery	Note: This API is experimental and may change in non backward-compatible ways in the future
AnalyzeEvaluator
AnalyzingInfixLookupFactory	Factory for AnalyzingInfixSuggester
AnalyzingLookupFactory	Factory for AnalyzingSuggester
AnnotatedApi	This class implements an Api just from an annotated java class The class must have an annotation EndPoint Each method must have an annotation Command The methods that implement a command should have the first 2 parameters SolrQueryRequest and SolrQueryResponse or it may optionally have a third parameter which could be a java class annotated with jackson annotations.
Api	Every version 2 API must extend the this class.
ApiBag
ApiBag.ExceptionWithErrObject
ApiBag.IntrospectApi
ApiBag.LazyLoadedApi
ApiBag.ReqHandlerToApi
APIConfigProvider<T extends APIConfigProvider.APIConfig>	Interface to be implemented by the Request Handlers that need to provide some custom configuration to the V2 APIs
APIConfigProvider.APIConfig
APIConfigProviderBinder	Jersey binder for APIConfigProvider
ApiSupport	The interface that is implemented by a request handler to support the V2 end point
ApiTool
AssertTool	Asserts various conditions and exists with error code if fails, else continues with no output
Assign
Assign.AssignmentException	Thrown if there is an exception while assigning nodes for replicas
Assign.AssignRequest
Assign.AssignRequestBuilder
Assign.AssignStrategy	Strategy for assigning replicas to nodes.
AtomicUpdateDocumentMerger
AtomicUpdateProcessorFactory	An update processor that will convert conventional field-value document to atomic update document
AttributeFetcher	Instances of this interface are used to fetch various attributes from nodes (and other sources) in the cluster.
AttributeFetcherImpl	Implementation of AttributeFetcher that uses SolrCloudManager to access Solr cluster details.
AttributeValues
AttributeValuesImpl	Implementation of AttributeValues used by AttributeFetcherImpl.
AuditEvent	Audit event that takes request and auth context as input to be able to audit log custom things.
AuditEvent.EventType
AuditEvent.Level
AuditEvent.RequestType
AuditLoggerPlugin	Base class for Audit logger plugins.
AuditLoggerPlugin.AuditEventFormatter	Interface for formatting the event
AuditLoggerPlugin.JSONAuditEventFormatter	Event formatter that returns event as JSON string
AuditLoggerPlugin.MuteRule
AuthenticationPlugin
AuthorizationContext	Request context for Solr to be used by Authorization plugin.
AuthorizationContext.CollectionRequest
AuthorizationContext.RequestType
AuthorizationPlugin	Authorization interface that needs to be implemented to write an authorization plugin.
AuthorizationResponse
AuthorizationUtils
AuthorizationUtils.AuthorizationFailure
AuthTool
AveragingMetricProvider	Averages the metric value over a period of time
AveragingMetricProvider.MetricProvider	Interface to provide the metric value.
AvgAgg
BackupAPIBase	Base class that facilitates reuse of common validation logic for collection-backup APIs.
BackupCmd
BackupFilePaths	Utility class for getting paths related to backups, or parsing information out of those paths.
BackupId	Represents the ID of a particular backup.
BackupManager	This class implements functionality to create a backup with extension points provided to integrate with different types of file-systems.
BackupProperties	Represents a backup[-*].properties file, responsible for holding whole-collection and whole-backup metadata.
BackupRepository	This interface defines the functionality required to backup/restore Solr indexes to an arbitrary storage system.
BackupRepository.PathType	This enumeration defines the type of a given path.
BackupRepositoryFactory
BalancePlan	A fully specified plan or instructions for replica balancing to be applied to the cluster.
BalancePlanFactory	Allows plugins to create BalancePlans telling the Solr layer how to balance replicas following the processing of a BalanceRequest.
BalancePlanFactoryImpl	Simple implementation of BalancePlanFactory.
BalanceReplicas	V2 API for balancing the replicas that already exist across a set of nodes.
BalanceReplicasCmd
BalanceRequest	A cluster related placement request that Solr asks a PlacementPlugin to resolve and compute replica balancing plan for replicas that already exist across a set of Nodes.
BalanceRequestImpl
BalanceShardUnique	V2 API implementation for insuring that a particular property is distributed evenly amongst the physical nodes comprising a collection.
BaseEditorialTransformer
BaseHandlerApiSupport	This is a utility class to provide an easy mapping of request handlers which support multiple commands to the V2 API format (core admin api, collections api).
BaseHandlerApiSupport.ApiCommand
BaseManagedTokenFilterFactory	Abstract based class for implementing TokenFilterFactory objects that are managed by the REST API.
BaseSolrResource	Base class for delegating REST-oriented requests to ManagedResources.
BasicAuthPlugin
BasicAuthPlugin.AuthenticationProvider
BasicResultContext
BBoxField
BBoxStrategy	Deprecated.
BinaryField
BinaryQueryResponseWriter	Implementations of BinaryQueryResponseWriter are used to write response in binary format.
BinaryResponseWriter
BinaryResponseWriter.Resolver
BitDocSet	A FixedBitSet based implementation of a DocSet.
BitsFilteredPostingsEnum
BlendedInfixLookupFactory	Factory for BlendedInfixLookupFactory
BlobHandler
BlobRepository	The purpose of this class is to store the Jars loaded in memory and to keep only one copy of the Jar in a single node.
BlobRepository.BlobContent<T>
BlobRepository.BlobContentRef<T>
BlobRepository.Decoder<T>
BlockJoin
BlockJoinChildQParser
BlockJoinChildQParserPlugin	Usage: {!child of="PARENT:true"}PARENT_PRICE:10
BlockJoinParentQParser
BlockJoinParentQParserPlugin	Usage: {!parent which="PARENT:true"}CHILD_PRICE:10 supports optional score parameter with one of ScoreMode values: None,Avg,Total,Min,Max.
BM25SimilarityFactory	Factory for BM25Similarity.
BooleanSimilarityFactory	Factory for BooleanSimilarity
BoolField
BoolQParserPlugin	Create a boolean query from sub queries.
BoostQParserPlugin	Create a boosted query from the input value.
BoundedTreeSet<E>	A TreeSet that ensures it never grows beyond a max size.
BreakIteratorBoundaryScanner
ByteBuffersDirectoryFactory	Factory to instantiate ByteBuffersDirectory
ByteDenseVectorParser
CacheConfig	Contains the knowledge of how cache config is stored in the solrconfig.xml file, and implements a factory to create caches.
CacheRegenerator	Implementations of CacheRegenerator are used in autowarming to populate a new cache based on an old cache.
CachingDirectoryFactory	A DirectoryFactory impl base class for caching Directory instances per path.
CachingDirectoryFactory.CacheValue
CachingDirectoryFactory.CloseListener
CaffeineCache<K,V>	A SolrCache backed by the Caffeine caching library [1].
CancellableCollector	Allows a query to be cancelled
CancellableCollector.QueryCancelledException	Thrown when a query gets cancelled
CancellableQueryTracker	Tracks metadata for active queries and provides methods for access
CancelTaskAPI	V2 API for cancelling a currently running "task".
CatchAllExceptionMapper	Flattens the exception and sets on a SolrJerseyResponse.
CategoryRoutedAlias
CatStream
CatStream.CrawlFile
CborLoader	This class can load a single document or a stream of documents in CBOR format this is equivalent of loading a single json documet or an array of json documents
CborResponseWriter	A response writer impl that can write results in CBOR (cbor.io) format when wt=cbor.
CertAuthPlugin	An authentication plugin that sets principal based on the certificate subject
CharBuffer	A simple StringBuffer replacement that aims to reduce copying as much as possible.
Checksum	Represents checksum information for an index file being backed up.
ChildDocTransformerFactory	Attaches all descendants (child documents) to each parent document.
ChildFieldValueSourceParser
CircuitBreaker	Default base class to define circuit breaker plugins for Solr.
CircuitBreakerManager	Deprecated. Use individual Circuit Breakers instead
CircuitBreakerRegistry	Keeps track of all registered circuit breaker instances for various request types.
CircularList<T>	FIFO Circular List.
ClassicIndexSchemaFactory
ClassicSimilarityFactory	Factory for ClassicSimilarity
ClassificationUpdateProcessorFactory	This class implements an UpdateProcessorFactory for the Classification Update Processor.
ClassificationUpdateProcessorFactory.Algorithm
ClassificationUpdateProcessorParams
ClassifyStream	The classify expression retrieves a model trained by the train expression and uses it to classify documents from a stream Syntax: classif(model(...), anyStream(...), field="body")
CLIO
CloneFieldUpdateProcessorFactory	Clones the values found in any matching source field into a configured dest field.
CloseHook	Used to request notification when the core is closed.
CloudConfig
CloudConfig.CloudConfigBuilder
CloudDescriptor	SolrCloud metadata attached to a CoreDescriptor.
CloudMLTQParser
CloudUtil
Cluster	A representation of the SolrCloud cluster state, providing information on which nodes and collections are part of the cluster and a way to get to more detailed info.
ClusterAPI	All V2 APIs that have a prefix of /api/cluster/
ClusterAPI.RoleInfo
ClusterEvent	Cluster-level event.
ClusterEvent.EventType
ClusterEventListener	Components that want to be notified of cluster-wide events should use this.
ClusterEventProducer	Component that produces ClusterEvent instances.
ClusterEventProducerBase	Base class for implementing ClusterEventProducer.
ClusterEventProducerFactory	This class helps in handling the initial registration of plugin-based listeners, when both the final ClusterEventProducer implementation and listeners are configured using plugins.
ClusterPluginsSource	A source for Cluster Plugin configurations
ClusterPropertiesChangedEvent	Event generated when ZkStateReader.CLUSTER_PROPS is modified.
ClusterSingleton	Intended for components that should be enabled only one instance per cluster.
ClusterSingleton.State
ClusterSingletons	Helper class to manage the initial registration of ClusterSingleton plugins and to track the changes in loaded plugins in ContainerPluginsRegistry.
ClusterStateMutator
ClusterStatus
ClusterStatus.Health	Shard / collection health state.
CodecFactory	Factory for plugging in a custom Codec
CollApiCmds	This class contains "smaller" Collection API commands implementation, the interface implemented by all commands and the class mapping a collection action to the actual command.
CollApiCmds.AddReplicaPropCmd
CollApiCmds.BalanceShardsUniqueCmd
CollApiCmds.CollectionApiCommand	Interface implemented by all Collection API commands.
CollApiCmds.CommandMap	Map CollectionParams.CollectionAction to instances of CollApiCmds.CollectionApiCommand and being usable by both OverseerCollectionMessageHandler and DistributedCollectionConfigSetCommandRunner so that the mappings do not have to be maintained in two places.
CollApiCmds.DeleteReplicaPropCmd
CollApiCmds.MockOperationCmd
CollApiCmds.ModifyCollectionCmd
CollApiCmds.RebalanceLeadersCmd
CollApiCmds.ReloadCollectionCmd
CollApiCmds.TraceAwareCommand
CollapseScoreFunction
CollapseScoreFunction.CollapseScoreFunctionValues
CollapsingQParserPlugin	The CollapsingQParserPlugin is a PostFilter that performs field collapsing.
CollapsingQParserPlugin.CollapseScore
CollapsingQParserPlugin.CollapsingPostFilter
CollapsingQParserPlugin.GroupHeadSelector	Models all the information about how group head documents should be selected
CollapsingQParserPlugin.GroupHeadSelectorType
CollapsingQParserPlugin.NullPolicy
CollationField	Field for collated sort keys.
CollectionApiLockFactory	This class implements a higher level locking abstraction for the Collection API using lower level read and write locks.
CollectionCommandContext	Data passed to Collection API command execution, to allow calls from either the OverseerCollectionMessageHandler when commands are executed on the Overseer, or - in a future change - allow Collection API commands to be executed in a distributed way, unrelated to and not depending upon Overseer abstractions (including overseer collection message handling).
CollectionHandlingUtils	This class contains helper methods used by commands of the Collection API.
CollectionHandlingUtils.ShardRequestTracker
CollectionMetrics	Collection-level metrics.
CollectionMetricsBuilder	Builder class for constructing instances of CollectionMetrics.
CollectionMetricsBuilder.ReplicaMetricsBuilder
CollectionMetricsBuilder.ShardMetricsBuilder
CollectionMutator
CollectionProperty	V2 API implementations for modifying collection-level properties.
CollectionsAddedEvent	Event generated when some collections have been added.
CollectionsHandler
CollectionsHandler.CollectionOperation
CollectionSnapshotMetaData	This class defines the meta-data about a collection level snapshot
CollectionSnapshotMetaData.CoreSnapshotMetaData
CollectionSnapshotMetaData.SnapshotStatus
CollectionsRemovedEvent	Event generated when some collections have been removed.
CollectionsRepairEventListener	This is an illustration how to re-implement the combination of Solr 8x NodeLostTrigger and AutoAddReplicasPlanAction to maintain the collection's replicas when nodes are lost.
CollectionStats	Modifiable version of CollectionStatistics useful for aggregation of per-shard stats.
CollectionStatusAPI	V2 API for displaying basic information about a single collection.
ColStatus	Report low-level details of collection.
Command
Command<T>	Defines a grouping command.
CommandHandler	Responsible for executing a search with a number of Command instances.
CommandHandler.Builder
CommitTracker	Helper class for tracking autoCommit state.
CommitUpdateCommand	A commit index command encapsulated in an object.
ComplexPhraseQParserPlugin	Parse Solr's variant on the Lucene ComplexPhraseQueryParser syntax.
ConcatFieldUpdateProcessorFactory	Concatenates multiple values for fields matching the specified conditions using a configurable delimiter which defaults to ", ".
ConcatStringFunction	ConcatStringFunction concatenates the string values of its components in the order given.
ConcurrentLRUCache<K,V>	A LRU cache implementation based upon ConcurrentHashMap and other techniques to reduce contention and synchronization overhead to utilize multiple CPU cores more effectively.
ConcurrentLRUCache.CacheEntry<K,V>
ConcurrentLRUCache.EvictionListener<K,V>
ConcurrentLRUCache.Stats
ConfigEditablePlugin	An interface to be implemented by a Plugin whose Configuration is runtime editable
ConfigOverlay	This class encapsulates the config overlay json file.
ConfigSet	Stores a core's configuration in the form of a SolrConfig and IndexSchema.
ConfigSetAPIBase	Parent class for all APIs that manipulate configsets
ConfigSetApiLockFactory	This class implements a higher level locking abstraction for the Config Set API using lower level read and write locks.
ConfigSetCmds	This class contains methods dealing with Config Sets and called for Config Set API execution, called from the OverseerConfigSetMessageHandler or from DistributedCollectionConfigSetCommandRunner.runConfigSetCommand(org.apache.solr.response.SolrQueryResponse, org.apache.solr.common.params.ConfigSetParams.ConfigSetAction, java.util.Map<java.lang.String, java.lang.Object>, long) depending on whether Collection and Config Set APIs are Overseer based or distributed.
ConfigSetDownloadTool
ConfigSetProperties	Utility methods for reading configSet properties.
ConfigSetService	Service class used by the CoreContainer to load ConfigSets for use in SolrCore creation.
ConfigSetService.ConfigResource
ConfigSetsHandler	A SolrRequestHandler for ConfigSets API requests.
ConfigSetUploadTool
ConfigTool	Sends a POST to the Config API to perform a specified action.
ConfigurablePlugin<T extends org.apache.solr.common.MapWriter>	Implement this interface if your plugin needs to accept some configuration
ConjunctionSolrSpellChecker	This class lets a query be run through multiple spell checkers.
Constants	constants used in facets package
ContainerPluginsApi	API to maintain container-level plugin configurations.
ContainerPluginsRegistry	This class manages the container-level plugins and their Api-s.
ContainerPluginsRegistry.Diff
ContainerPluginsRegistry.PluginRegistryListener	Listener for notifications about added / deleted / modified plugins.
ContainerRequestUtils	Utility methods for creating and populating a ContainerRequest for use with Jersey ApplicationHandlers
ContentStreamHandlerBase	Shares common code between various handlers that manipulate ContentStream objects.
ContentStreamLoader	Load a ContentStream into Solr
CoordinateFieldType	A CoordinateFieldType is the base class for FieldTypes that have semantics related to items in a coordinate system.
CoordinatorHttpSolrCall	A coordinator node can serve requests as if it hosts all collections in the cluster.
CoordinatorHttpSolrCall.Factory
CoordinatorV2HttpSolrCall
CopyField	CopyField contains all the information of a valid copy fields in an index.
CoreAdminAPIBase	A common parent for admin Core Jersey-based APIs.
CoreAdminAPIBase.CoreAdminAPIBaseException	Helper RuntimeException to allow passing checked exceptions to the caller of the handle method.
CoreAdminHandler
CoreAdminHandler.CallInfo
CoreAdminHandler.CoreAdminAsyncTracker
CoreAdminHandler.CoreAdminAsyncTracker.TaskObject	Helper class to manage the tasks to be tracked.
CoreAdminHandler.CoreAdminOp
CoreAdminOperation
CoreAugmenterFactory
CoreContainer
CoreContainer.CoreLoadFailure
CoreContainerProvider	A service that can provide access to solr cores.
CoreDescriptor	Metadata about a SolrCore.
CorePropertiesLocator	Persists CoreDescriptors as properties files
CoreReplicationAPI	V2 APIs for inspecting and replicating indices
CoreReplicationAPI.FileListResponse	Response for CoreReplicationAPI.fetchFileList(long).
CoreReplicationAPI.FileMetaData	Contained in CoreReplicationAPI.FileListResponse, this holds metadata from a file for an index
CoreReplicationAPI.IndexVersionResponse	Response for CoreReplicationAPI.fetchIndexVersion().
CoresLocator	Manage the discovery and persistence of core definitions across Solr restarts
CoreSnapshot	V2 API for Creating, Listing, and Deleting Core Snapshots.
CoreSorter	This is a utility class that sorts cores in such a way as to minimize other cores waiting for replicas in the current node.
CountAgg
CountFieldValuesUpdateProcessorFactory	Replaces any list of values for a field matching the specified conditions with the count of the number of values for that field.
CountValsAgg	AggValueSource to count values for given ValueSource
CpuAllowedLimit	Enforces a CPU-time based timeout on a given SolrQueryRequest, as specified by the cpuAllowed query parameter.
CPUCircuitBreaker	Tracks current CPU usage and triggers if the specified threshold is breached.
CreateAliasAPI	V2 API for creating an alias
CreateAliasAPI.CategoryRoutedAliasProperties
CreateAliasAPI.CreateAliasRequestBody
CreateAliasAPI.RoutedAliasProperties
CreateAliasAPI.TimeRoutedAliasProperties
CreateAliasCmd
CreateCollection	V2 API for creating a SolrCLoud collection
CreateCollectionBackup	V2 API for creating a new "backup" of a specified collection
CreateCollectionCmd
CreateCollectionSnapshot	V2 API implementation for creating a collection-level snapshot.
CreateCollectionTool	Supports create_collection command in the bin/solr script.
CreateConfigSetAPI	V2 API for creating a new configset as a copy of an existing one.
CreateCoreAPI	V2 API for creating a new core on the receiving node.
CreateCoreBackup
CreateCoreTool
CreateReplica	V2 API implementation for adding a new replica to an existing shard.
CreateShard	V2 API for creating a new shard in a collection.
CreateShardCmd
CreateSnapshotCmd	This class implements the functionality of creating a collection level snapshot.
CreateTool
CrossCollectionJoinQParser
CrossCollectionJoinQuery
CryptoKeys	A utility class with helpers for various signature and certificate tasks
CryptoKeys.RSAKeyPair
CSVLoader
CSVLoaderBase
CSVParser	Parses CSV files according to the specified configuration.
CSVPrinter	Print values as a comma separated list.
CSVResponseWriter	Response writer for csv data
CSVStrategy	CSVStrategy
CSVUtils	Utility methods for dealing with CSV files
CurrencyField	Deprecated. Use CurrencyFieldType
CurrencyFieldType	Field type for support of monetary values.
CurrencyValue	Represents a Currency field value, which includes a long amount and ISO currency code.
CursorMark	An object that encapsulates the basic information about the current Mark Point of a "Cursor" based request.
DataConfigNode	ConfigNode impl that copies and maintains data internally from DOM
DateMathParser	A Simple Utility class for parsing "math" like strings relating to Dates.
DatePointField	FieldType that can represent any Date/Time with millisecond precision.
DateRangeField	A field for indexed dates and date ranges.
DateValueFieldType	Marker interface for Date-valued field types.
DebugComponent	Adds debugging information to a request.
DefaultClusterEventProducer	Implementation of ClusterEventProducer.
DefaultEncoder	Use the DefaultEncoder
DefaultMergePolicyFactory	A MergePolicyFactory for the default MergePolicy.
DefaultPackageRepository	This is a serializable bean (for the JSON that is stored in /repository.json) representing a repository of Solr packages.
DefaultSampleDocumentsLoader
DefaultSchemaSuggester
DefaultSolrCoreState
DefaultSolrHighlighter
DefaultSolrHighlighter.FvhContainer
DefaultValueUpdateProcessorFactory	An update processor that adds a constant default value to any document being added that does not already have a value in the specified field.
DelegateRegistryCounter	A counter implementation that is aware of both primary and delegate metrics belonging to different registries and able to update metrics in multiple registries
DelegateRegistryHistogram	A meter implementation that is aware of both primary and delegate metrics belonging to different registries and able to update metrics in multiple registries
DelegateRegistryMeter	A meter implementation that is aware of both primary and delegate metrics belonging to different registries and able to update metrics in multiple registries
DelegateRegistryTimer	A timer implementation that is aware of both primary and delegate metrics belonging to different registries and able to update metrics in multiple registries
DelegatingBackupRepository	Delegates to another BackupRepository.
DelegatingClusterEventProducer	This implementation allows Solr to dynamically change the underlying implementation of ClusterEventProducer in response to the changed plugin configuration.
DelegatingCollector	A simple delegating collector where one can set the delegate after creation
DelegatingEventListener	A SolrEventListener wrapper that loads class from a package and reload if it's modified
DelegatingPlacementPluginFactory	Helper class to support dynamic reloading of plugin implementations.
DelegatingSolrQueryRequest	A SolrQueryRequest implementation that defers to a delegate in all cases.
DeleteAlias
DeleteAliasCmd
DeleteBackupCmd	An overseer command used to delete files associated with incremental backups.
DeleteCollection	V2 API for deleting collections.
DeleteCollectionBackup	V2 API definitions for collection-backup deletion.
DeleteCollectionCmd
DeleteCollectionRequest	Delete collection request.
DeleteCollectionSnapshot	V2 API impl for Deleting Collection Snapshots.
DeleteConfigSetAPI	V2 API for deleting an existing configset
DeleteNode	V2 API for deleting all replicas of all collections in one node.
DeleteNodeCmd
DeleteReplica	V2 APIs for deleting one or more existing replicas from one or more shards.
DeleteReplicaCmd
DeleteReplicaProperty	V2 API implementation for removing a property from a collection replica
DeleteReplicasRequest	Delete replicas request.
DeleteShard	V2 API implementation for deleting a particular shard from its collection.
DeleteShardCmd
DeleteShardsRequest	Delete shards request.
DeleteSnapshotCmd	This class implements the functionality of deleting a collection level snapshot.
DeleteTool
DeleteUpdateCommand
DenseVectorField	Provides a field type to support Lucene's KnnVectorField.
DenseVectorParser
DenseVectorParser.BuilderPhase
DeprecationLog	Utility to log a deprecation.
DFISimilarityFactory	Factory for DFISimilarity
DFRSimilarityFactory	Factory for DFRSimilarity
Diagnostics
Diagnostics.Callable
DictionaryFactory	Encapsulates shared fields for all types of dictionaryFactory classes
DimensionalRoutedAlias
DirectoryFactory	Provides access to a Directory implementation.
DirectoryFactory.DirContext
DirectSolrConnection	DirectSolrConnection provides an interface to Solr that is similar to the HTTP interface, but does not require an HTTP connection.
DirectSolrSpellChecker	Spellchecker implementation that uses DirectSpellChecker
DirectUpdateHandler2	DirectUpdateHandler2 implements an UpdateHandler where documents are added directly to the main Lucene index as opposed to adding to a separate smaller index.
DisMaxQParser	Query parser for dismax queries
DisMaxQParserPlugin	Create a dismax query from the input value.
DistanceUnits	Used with a spatial field type for all distance measurements.
DistribFileStore
DistributedApiAsyncTracker	Class holding the implementation required for tracking asynchronous Collection API (or other) tasks when the Collection API is distributed.
DistributedClusterStateUpdater	Gives access to distributed cluster state update methods and allows code to inquire whether distributed state update is enabled.
DistributedClusterStateUpdater.MutatingCommand	Naming of enum instances are the mutator object name (e.g.
DistributedClusterStateUpdater.StateChangeRecorder	Class handling the distributed updates of collection's Zookeeper files state.json based on multiple updates applied to a single collection (as is sometimes done by *Cmd classes implementing the Collection API commands).
DistributedCollectionCommandContext
DistributedCollectionConfigSetCommandRunner	Class for execution Collection API and Config Set API commands in a distributed way, without going through Overseer and OverseerCollectionMessageHandler or OverseerConfigSetMessageHandler.
DistributedCollectionLockFactory
DistributedConfigSetLockFactory
DistributedLock	A lock that can be used across cluster nodes.
DistributedMap	A distributed map.
DistributedMultiLock	A lock as acquired for running a single API command (Collection or Config Set or anything else in the future).
DistributedUpdateProcessor
DistributedUpdateProcessor.DistribPhase	Values this processor supports for the DISTRIB_UPDATE_PARAM.
DistributedUpdateProcessor.DistributedUpdatesAsyncException
DistributedUpdateProcessor.LeaderRequestReplicationTracker
DistributedUpdateProcessor.RollupRequestReplicationTracker
DistributedUpdateProcessorFactory	Factory for DistributedUpdateProcessor.
DistributedZkUpdateProcessor
DistributingUpdateProcessorFactory	A marker interface for denoting that a factory is responsible for handling distributed communication of updates across a SolrCloud cluster.
DocBasedVersionConstraintsProcessor
DocBasedVersionConstraintsProcessorFactory	This Factory generates an UpdateProcessor that helps to enforce Version constraints on documents based on per-document version numbers using a configured versionField, a comma-delimited list of fields to check for version numbers.
DocExpirationUpdateProcessorFactory	Update Processor Factory for managing automatic "expiration" of documents.
DocIdAugmenterFactory	Augments the document with a [docid] integer containing it's current (internal) id in the lucene index.
DocIterator	Simple Iterator of document Ids which may include score information.
DocList	DocList represents the result of a query: an ordered list of document ids with optional score.
DocListAndSet	A struct whose only purpose is to hold both a DocList and a DocSet so that both may be returned from a single method.
DocSet	An immutable ordered set of Lucene Document Ids.
DocSetBuilder	Adapted from DocIdSetBuilder to build DocSets
DocSetCollector
DocSetCollector.ExpandingIntArray
DocSetProducer
DocSetUtil
DocSlice	DocSlice implements DocList as an array of docids and optional scores.
DocsStreamer	This streams SolrDocuments from a DocList and applies transformer
DocTermOrds	This class enables fast access to multiple term ords for a specified field across all docIDs.
DocTransformer	A DocTransformer can add, remove or alter a Document before it is written out to the Response.
DocTransformer.NoopFieldTransformer	Trivial Impl that ensure that the specified field is requested as an "extra" field, but then does nothing during the transformation phase.
DocTransformers	Transform a document before it gets sent out
DocumentAnalysisRequestHandler	An analysis handler that provides a breakdown of the analysis process of provided documents.
DocumentBuilder	Builds a Lucene Document from a SolrInputDocument.
DocumentDictionaryFactory	Factory for DocumentDictionary
DocumentExpressionDictionaryFactory	Factory for DocumentValueSourceDictionary
DocValuesAcc	Accumulates stats separated by slot number for the fields with DocValues
DocValuesFacets	Computes term facets for docvalues field (single or multivalued).
DocValuesIteratorCache	A helper class for random-order value access over docValues (such as in the case of useDocValuesAsStored).
DocValuesIteratorCache.FieldDocValuesSupplier	Supplies (and coordinates arbitrary-order value retrieval over) docValues iterators for a particular field, encapsulating the logic of iterator creation, reuse/caching, and advancing.
DocValuesStats	Computes term stats for docvalues field (single or multivalued).
DOMConfigNode	Read using DOM
DoublePointField	PointField implementation for Double values.
DoubleValueFieldType	Marker interface for double-valued field types.
DualDoubleFunction	Abstract ValueSource implementation which wraps two ValueSources and applies an extendible double function to their values.
DumpRequestHandler
DynamicMap	An efficient map for storing keys as integer in range from 0..n with n can be estimated up-front.
EarlyTerminatingCollector	A wrapper Collector that throws EarlyTerminatingCollectorException) once a specified maximum number of documents are collected.
EarlyTerminatingCollectorException	Thrown by EarlyTerminatingCollector when the maximum to abort the scoring / collection process early, when the specified maximum number of documents were collected.
ElectionContext
ElevatedMarkerFactory	Used to mark whether a document has been elevated or not
EmbeddedSolrServer	SolrClient that connects directly to a CoreContainer.
EmbeddedSolrServer.RequestWriterSupplier
EndPoint
EndResultTransformer	Responsible for transforming the grouped result into the final format for displaying purposes.
EndResultTransformer.SolrDocumentSource	Abstracts the source for SolrDocument instances.
EnumField	Deprecated. use EnumFieldType instead.
EnumFieldType	Field type for support of string values with custom sort order.
EnvSSLCredentialProvider	Environment variable based SSL configuration provider
EnvSSLCredentialProvider.EnvVars
EphemeralDirectoryFactory	Directory provider for implementations that do not persist over reboots.
EqualFunction	Compares two values for equality.
ExactSharedStatsCache	This class implements exact caching of statistics.
ExactStatsCache	This class implements exact caching of statistics.
ExactStatsCache.ExactStatsSource
ExceptionWhileTracing
ExchangeRateProvider	Interface for providing pluggable exchange rate providers to @CurrencyField
ExcludedMarkerFactory
ExpandComponent	The ExpandComponent is designed to work with the CollapsingPostFilter.
ExperimentalResponse	SolrJerseyResponse implementation with a warning field indicating that the format may change
ExplainAugmenterFactory
ExplainAugmenterFactory.Style
ExportHandler
ExportHandler.ExportHandlerStreamFactory
ExportQParserPlugin
ExportQParserPlugin.ExportQParser
ExportQParserPlugin.ExportQuery
ExportTool
ExportTool.Info
ExportWriter	Prepares and writes the documents requested by /export requests
ExportWriter.IgnoreException
ExportWriterStream	Stream implementation that helps supporting 'expr' streaming in export writer.
ExtendedDismaxQParser	Query parser that generates DisjunctionMaxQueries based on user configuration.
ExtendedDismaxQParser.Clause
ExtendedDismaxQParser.ExtendedDismaxConfiguration	Simple container for configuration information used when parsing queries
ExtendedDismaxQParser.ExtendedSolrQueryParser	A subclass of SolrQueryParser that supports aliasing fields for constructing DisjunctionMaxQueries.
ExtendedDismaxQParser.ExtendedSolrQueryParser.Alias	A simple container for storing alias info
ExtendedDismaxQParserPlugin	An advanced multi-field query parser based on the DisMax parser.
ExtendedQuery	The ExtendedQuery interface provides extra metadata to a query.
ExtendedQueryBase
ExternalFileField	Get values from an external file instead of the index.
ExternalFileFieldReloader	An event listener to reload ExternalFileFields for new searchers.
ExternalRoleRuleBasedAuthorizationPlugin	Rule Based Authz plugin implementation which reads user roles from the request.
FacetBucket
FacetComponent	Computes facets -- aggregations with counts of terms or ranges over the whole search results.
FacetComponent.DistribFieldFacet	This API is experimental and subject to change
FacetComponent.FacetBase	This API is experimental and subject to change
FacetComponent.FacetContext	Encapsulates facet ranges and facet queries such that their parameters are parsed and cached for efficient re-use.
FacetComponent.FacetInfo	This class is used exclusively for merging results from each shard in a distributed facet request.
FacetComponent.FieldFacet	This API is experimental and subject to change
FacetComponent.QueryFacet	This API is experimental and subject to change
FacetComponent.ShardFacetCount	This API is experimental and subject to change
FacetContext
FacetDebugInfo
FacetField
FacetField.FacetMethod
FacetFieldMerger
FacetHeatmap	JSON Facet API request for a 2D spatial summary of a rectangular region.
FacetMerger
FacetMerger.Context
FacetModule
FacetProcessor<T extends FacetRequest>	Base abstraction for a class that computes facets.
FacetQuery
FacetRange
FacetRangeMerger
FacetRequest	A request to do facets/stats that might itself be composed of sub-FacetRequests.
FacetRequest.Domain
FacetRequest.Domain.GraphField	Are we doing a query time graph across other documents
FacetRequest.Domain.JoinField	Are we doing a query time join across other documents
FacetRequest.FacetSort	Simple structure for encapsulating a sort variable and a direction
FacetRequest.RefineMethod
FacetRequest.SortDirection
FieldAnalysisRequestHandler	Provides the ability to specify multiple field types and field names in the same request.
FieldCache	Expert: Maintains caches of term values.
FieldCache.CacheEntry	EXPERT: A unique Identifier/Description for each item in the FieldCache.
FieldCache.CreationPlaceholder	Placeholder indicating creation of this cache is currently in-progress.
FieldCache.Parser	interface to all parsers.
FieldCache.PointParser	Base class for points parsers.
FieldCacheImpl	Expert: The default cache implementation, storing all values in memory.
FieldCacheImpl.BinaryDocValuesImpl
FieldCacheImpl.LongsFromArray
FieldCacheImpl.SortedDocValuesImpl
FieldFacetStats	FieldFacetStats is a utility to accumulate statistics on a set of values in one field, for facet values present in another field.
FieldLengthUpdateProcessorFactory	Replaces any CharSequence values found in fields matching the specified conditions with the lengths of those CharSequences (as an Integer).
FieldMutatingUpdateProcessor	Reusable base class for UpdateProcessors that will consider AddUpdateCommands and mutate the values associated with configured fields.
FieldMutatingUpdateProcessor.FieldNameSelector	Interface for identifying which fields should be mutated
FieldMutatingUpdateProcessorFactory	Base class for implementing Factories for FieldMutatingUpdateProcessors and FieldValueMutatingUpdateProcessors.
FieldMutatingUpdateProcessorFactory.SelectorParams
FieldNameMutatingUpdateProcessorFactory	In the FieldNameMutatingUpdateProcessorFactory configured below, fields names will be mutated if the name contains space.
FieldNameValueSource	Placeholder value source.
FieldParams	A class to hold "phrase slop" and "boost" parameters for pf, pf2, pf3 parameters
FieldProperties
FieldQParserPlugin	Create a field query from the input value, applying text analysis and constructing a phrase query if appropriate.
FieldType	Base class for all field types used by an index schema.
FieldType.MultiValueSelector	An enumeration representing various options that may exist for selecting a single value from a multivalued field.
FieldTypePluginLoader
FieldTypeXmlAdapter	Utility class for converting a JSON definition of a FieldType into the XML format expected by the FieldTypePluginLoader.
FieldUtil
FieldUtil.DVOrdValues
FieldUtil.FCOrdValues
FieldUtil.OrdFunc	The following ord visitors and wrappers are a work in progress and experimental
FieldUtil.OrdValues
FieldValueMutatingUpdateProcessor	Abstract subclass of FieldMutatingUpdateProcessor for implementing UpdateProcessors that will mutate all individual values of a selected field independently
FieldValueSubsetUpdateProcessorFactory	Base class for processors that want to mutate selected fields to only keep a subset of the original values.
FileBasedSpellChecker	A spell checker implementation that loads words from a text file (one word per line).
FileDictionaryFactory	Factory for FileDictionary
FileExchangeRateProvider	Configuration for currency.
FileFloatSource	Obtains float field values from an external file.
FileFloatSource.ReloadCacheRequestHandler
FileStore	The interface to be implemented by any package store provider * @lucene.experimental
FileStore.FileDetails
FileStore.FileEntry
FileStore.FileType
FileStoreAPI
FileStoreAPI.MetaData
FileSystemConfigSetService	FileSystem ConfigSetService impl.
FileTypeMagicUtil	Utility class to guess the mime type of file based on its magic number.
FileUtils
FilterCollector	A collector that filters incoming doc ids that are not in the filter.
FilteredDocIdSet	Abstract decorator class for a DocIdSet implementation that provides on-demand filtering/validation mechanism on a given DocIdSet.
FilteringSolrMetricReporter	A SolrMetricReporter that supports (prefix) filters.
FilterQuery	A filtered query wrapped around another query similar to BooleanClause.Occur.FILTER -- it scores as 0.
FiltersQParser
FiltersQParserPlugin
FirstFieldValueUpdateProcessorFactory	Keeps only the first value of fields matching the specified conditions.
FloatConsumer	Represents an operation that accepts a single float-valued argument and returns no result.
FloatDenseVectorParser
FloatPayloadValueSource
FloatPointField	PointField implementation for Float values.
FloatValueFieldType	Marker interface for float-valued field types.
ForceLeader	V2 API implementation for triggering a leader election on a particular collection and shard.
FreeTextLookupFactory	LookupFactory implementation for FreeTextSuggester
FSTLookupFactory	Factory for FSTCompletionLookup
FunctionQParser
FunctionQParserPlugin	Create a function query from the input value.
FunctionRangeQParserPlugin	Create a range query over a function.
FunctionRangeQuery
FuzzyLookupFactory	Factory for FuzzySuggester
GapFragmenter
GeoDistValueSourceParser	Parses "geodist" creating HaversineConstFunction or HaversineFunction or calling SpatialStrategy.makeDistanceValueSource(org.locationtech.spatial4j.shape.Point,double).
GeohashFunction	Deprecated.
GeohashHaversineFunction	Deprecated.
GeoJSONResponseWriter	Extend the standard JSONResponseWriter to support GeoJSON.
GeoTransformerFactory	This DocumentTransformer will write a Shape to the SolrDocument using the requested format.
GetAuthenticationConfigAPI	V2 API for fetching the authentication section from Solr's security.json configuration.
GetAuthorizationConfigAPI	V2 API for fetching the authorization section of Solr's security.json configuration.
GetBlobInfoAPI	V2 APIs for fetching blob(s) and their metadata
GetConfigAPI	V2 APIs for retrieving some or all configuration relevant to a particular collection (or core).
GetNodeCommandStatus	Implementation of V2 API interface GetNodeCommandStatusApi for checking the status of a core-level asynchronous command.
GetPublicKey	V2 API implementation to fetch the public key of the receiving node.
GetSchema
GetSchemaFieldAPI	GetSchemaFieldAPI contains the V2 APIs for all field related endpoint which are /fields /fields/{fieldName} /copyfields /dynamicfields /dynamicfields/{fieldName} /fieldtypes /fieldtypes/{fieldTypeName}
GetSchemaFieldAPI.SchemaGetDynamicFieldInfoResponse
GetSchemaFieldAPI.SchemaGetFieldInfoResponse
GetSchemaFieldAPI.SchemaGetFieldTypeInfoResponse
GetSchemaFieldAPI.SchemaListCopyFieldsResponse
GetSchemaFieldAPI.SchemaListDynamicFieldsResponse
GetSchemaFieldAPI.SchemaListFieldsResponse
GetSchemaFieldAPI.SchemaListFieldTypesResponse
GraphHandler	Solr Request Handler for graph traversal with streaming functions that responds with GraphML markup.
GraphHandler.DummyErrorStream
GraphHandler.TimerStream
GraphMLResponseWriter
GraphPointsCollector
GraphQParserPlugin	Query parser plugin for solr to wrap the graph query parser.
GraphQuery	GraphQuery - search for nodes and traverse edges in an index.
GraphQueryParser	Solr query parser that will handle parsing graph query requests.
GraphTermsQParserPlugin	The GraphTermsQuery builds a disjunction query from a list of terms.
GroupedEndResultTransformer	Implementation of EndResultTransformer that keeps each grouped result separate in the final response.
Grouping	Basic Solr Grouping infrastructure.
Grouping.Format
Grouping.TotalCount
GroupingSpecification	Encapsulates the grouping options like fields group sort and more specified by clients.
HashQParserPlugin	syntax fq={!hash workers=11 worker=4 keys=field1,field2}
HashRangeQParser
HashRangeQParserPlugin	Matches documents where the specified field hashes to a value within the given range.
HashRangeQuery
HasImplicitIndexAnalyzer	Marker interface for field types that have an implicit (non-user-configurable) index-time schema.
HaversineConstFunction	Haversine function with one point constant
HaversineFunction	Calculate the Haversine formula (distance) between any two points on a sphere Takes in four value sources: (latA, lonA); (latB, lonB).
HaversineMetersEvaluator
HaversineMetersEvaluator.HaversineDistance
HealthCheckHandler	Health Check Handler for reporting the health of a specific node.
HealthcheckTool
HighFrequencyDictionaryFactory	Factory for HighFrequencyDictionary
HighlightComponent	Highlights query words in the search results.
HighlightComponent.HighlightMethod
HighlightingPluginBase
HLL	A probabilistic set of hashed long elements.
HLLAgg
HLLAgg.HLLFactory
HLLType	The types of algorithm/data structure that HLL can utilize.
HtmlEncoder	Use the SimpleHTMLEncoder
HtmlFormatter	Use the SimpleHTMLFormatter
HTMLStripFieldUpdateProcessorFactory	Strips all HTML Markup in any CharSequence values found in fields matching the specified conditions.
HttpCacheHeaderUtil
HttpClientBuilderPlugin	Plugin interface for configuring internal HttpClients.
HttpClientMetricNameStrategy	Strategy for creating metric names for HttpClient Copied from metrics-httpclient library
HttpServletAuthorizationContext	An AuthorizationContext implementation that delegates many methods to an underlying HttpServletRequest
HttpServletCarrier	A Carrier for extract Span context out of request headers
HttpShardHandler
HttpShardHandlerFactory
HttpSolrCall	This class represents a call made to Solr
IBSimilarityFactory	Factory for IBSimilarity
IdUtils	Helper class for generating unique ID-s.
IGainTermsQParserPlugin
IgnoreCommitOptimizeUpdateProcessorFactory	Gives system administrators a way to ignore explicit commit or optimize requests from clients.
IgnoreFieldUpdateProcessorFactory	Ignores & removes fields matching the specified conditions from any document being added to the index.
IgnoreLargeDocumentProcessorFactory	Gives system administrators a way to ignore very large update from clients.
InactiveShardRemover	This Cluster Singleton can be configured to periodically find and remove Slice.State.INACTIVE Shards that are left behind after a Shard is split
InactiveShardRemoverConfig
IncompleteRerankingException
IncrementalShardBackup	Responsible for orchestrating the actual incremental backup process.
IncrementalShardBackup.IncrementalShardSnapshotResponse
IndexBasedSpellChecker	A spell checker implementation that loads words from Solr as well as arbitrary Lucene indices.
IndexDeletionPolicyWrapper	A wrapper for an IndexDeletionPolicy instance.
IndexFetcher	Provides functionality of downloading changed index files as well as config files and a timer for scheduling fetches from the leader.
IndexFetcher.CompareResult
IndexFetcher.IndexFetchResult
IndexFingerprint
IndexOutputOutputStream	Wraps an IndexOutput to expose it as an OutputStream.
IndexReaderFactory	Factory used to build a new IndexReader instance.
IndexSchema	IndexSchema contains information about the valid fields in an index and the types of those fields.
IndexSchema.DynamicCopy
IndexSchema.DynamicField
IndexSchema.DynamicReplacement
IndexSchema.DynamicReplacement.DynamicPattern
IndexSchema.SchemaProps
IndexSchema.SchemaProps.Handler
IndexSchemaFactory	Base class for factories for IndexSchema implementations
IndexSchemaFactory.VersionedConfig
IndexSizeEstimator	Estimates the raw size of all uncompressed indexed data by scanning term, docValues and stored fields data.
IndexSizeEstimator.Estimate
IndexSizeEstimator.Item
IndexSizeEstimator.ItemPriorityQueue
IndexSizeEstimator.MapWriterSummaryStatistics
InfoHandler
InitParams	An Object which represents a <initParams> tag
InjectionFactories
InjectionFactories.RequestContextBasedFactory	Allows access to a ContainerRequestContext via a ServiceLocator
InjectionFactories.ReuseFromContextIndexSchemaFactory
InjectionFactories.ReuseFromContextSolrCoreFactory	Fetch the (existing) SolrCore from the request context
InjectionFactories.ReuseFromContextSolrParamsFactory
InjectionFactories.SingletonFactory<T>
InjectionFactories.SolrQueryRequestFactory
InjectionFactories.SolrQueryResponseFactory
InstallCoreData	V2 API implementation of the "Install Core Data" Core-Admin API
InstallCoreDataOp	v1 shim implementation of the "Install Core Data" API, a core-admin API used to implement the "Install Shard Data" Collection-Admin functionality
InstallShardData	V2 API implementation allowing users to import offline-constructed index into a shard.
InstallShardDataCmd	Overseer processing for the "install shard data" API.
InstallShardDataCmd.RemoteMessage	A value-type representing the message received by InstallShardDataCmd
InstrumentedHttpListenerFactory	A HttpListenerFactory tracking metrics and distributed tracing.
InstrumentedHttpListenerFactory.NameStrategy
InstrumentedHttpRequestExecutor	Sub-class of HttpRequestExecutor which tracks metrics interesting to solr Inspired and partially copied from dropwizard httpclient library
InstrumentedPoolingHttpClientConnectionManager	Sub-class of PoolingHttpClientConnectionManager which tracks metrics interesting to Solr.
IntComp
IntComp.IntAsc
IntComp.IntDesc
IntervalFacets	Computes interval facets for docvalues field (single or multivalued).
IntervalFacets.FacetInterval	Helper class to match and count of documents in specified intervals
IntFloatDynamicMap
IntIntDynamicMap
IntLongDynamicMap
IntPointField	PointField implementation for Integer values.
IntValue
IntValueFieldType	Marker interface for int-valued field types.
IOFunction<T,R>	A Function that may throw an IOException
ISchemaVersion	A serialization schema for HLLs.
IterativeMergeStrategy
IWordDeserializer	Reads 'words' of a fixed width, in sequence, from a byte array.
JacksonJsonWriter	A JSON ResponseWriter that uses jackson.
JacksonJsonWriter.WriterImpl
JacksonReflectMapWriter	A MapWriter implementation that relies on Jackson's JsonProperty annotation.
JaspellLookup	Deprecated. Migrate to one of the newer suggesters which are much more RAM efficient.
JaspellLookupFactory	Factory for JaspellLookup Note: This Suggester is not very RAM efficient.
JaspellTernarySearchTrie	Deprecated. Migrate to one of the newer suggesters which are much more RAM efficient.
JaspellTernarySearchTrie.TSTNode	An inner class of Ternary Search Trie that represents a node in the trie.
JavabinLoader	Update handler which uses the JavaBin format
JerseyAppHandlerCache	Stores Jersey 'ApplicationHandler' instances by an ID or hash derived from their ConfigSet.
JerseyApplications	JAX-RS "application" configurations for Solr's CoreContainer and SolrCore instances
JerseyApplications.CoreContainerApp
JerseyApplications.SolrCoreApp
JerseyResource	A marker parent type for all Jersey "resource" classes.
JettyBridgeResponseWriter	A ResponseWriter which copies that output of JAX-RS computation over to HttpServletResponse object used by the Jetty server.
JmxMetricsReporter	This is a modified copy of Dropwizard's JmxReporter and classes that it internally uses, with a few important differences: this class knows that it can directly use MetricsMap as a dynamic MBean.
JmxMetricsReporter.Builder	Builder for the JmxMetricsReporter class.
JmxMetricsReporter.JmxCounterMBean
JmxMetricsReporter.JmxGaugeMBean
JmxMetricsReporter.JmxHistogramMBean
JmxMetricsReporter.JmxMeterMBean
JmxMetricsReporter.JmxTimerMBean
JmxMetricsReporter.MetricMBean
JmxObjectNameFactory	Factory to create MBean names for a given metric.
JmxUtil	Utility methods to find a MBeanServer.
JoinQParserPlugin
JsonLoader
JsonPreAnalyzedParser
JSONResponseWriter
JSONUtil
JSONWriter
JulInfo
JulWatcher
KnnQParser
KnnQParserPlugin	A neural query parser to run K-nearest neighbors search on Dense Vector fields.
LastFieldValueUpdateProcessorFactory	Keeps only the last value of fields matching the specified conditions.
LatLonPointSpatialField	A spatial implementation based on Lucene's LatLonPoint and LatLonDocValuesField.
LatLonPointSpatialField.LatLonPointSpatialStrategy
LeaderElector	Leader Election process.
LeaderRecoveryWatcher	We use this watcher to wait for any eligible replica in a shard to become active so that it can become a leader.
LegacyDoubleField	Deprecated. Please use DoublePoint instead
LegacyFacet
LegacyFacet.Subfacet
LegacyField	Deprecated. Please switch to PointValues instead
LegacyFieldType	Deprecated. Please switch to PointValues instead
LegacyFloatField	Deprecated. Please use FloatPoint instead
LegacyIntField	Deprecated. Please use IntPoint instead
LegacyLongField	Deprecated. Please use LongPoint instead
LegacyNumericRangeQuery<T extends Number>	Deprecated. Instead index with IntPoint, LongPoint, FloatPoint, DoublePoint, and create range queries with IntPoint.newRangeQuery(), LongPoint.newRangeQuery(), FloatPoint.newRangeQuery(), DoublePoint.newRangeQuery() respectively.
LegacyNumericRangeQueryBuilder	Deprecated. Index with points and use PointRangeQueryBuilder instead
LegacyNumericTokenStream	Deprecated. Please switch to PointValues instead
LegacyNumericTokenStream.LegacyNumericTermAttribute	Expert: Use this attribute to get the details of the currently generated token.
LegacyNumericTokenStream.LegacyNumericTermAttributeImpl	Implementation of LegacyNumericTokenStream.LegacyNumericTermAttribute.
LegacyNumericType	Deprecated. Please switch to PointValues instead
LegacyNumericUtils	Deprecated. Please use PointValues instead.
LegacyNumericUtils.IntRangeBuilder	Callback for LegacyNumericUtils.splitIntRange(org.apache.solr.legacy.LegacyNumericUtils.IntRangeBuilder, int, int, int).
LegacyNumericUtils.LongRangeBuilder	Callback for LegacyNumericUtils.splitLongRange(org.apache.solr.legacy.LegacyNumericUtils.LongRangeBuilder, int, long, long).
ListActiveTasksAPI	V2 API for listing any currently running "tasks".
ListAliases	V2 API implementation for listing and inspecting collection aliases
ListCollectionBackups	V2 API implementations for collection-backup "listing".
ListCollections	V2 API for listing collections.
ListCollectionSnapshotsAPI	V2 API for Listing Collection Snapshots.
ListCollectionSnapshotsAPI.ListSnapshotsResponse	The Response for ListCollectionSnapshotsAPI's ListCollectionSnapshotsAPI.listSnapshots(String)
ListConfigSets	V2 API implementation for listing all available configsets.
ListenerConfig
LMDirichletSimilarityFactory	Factory for LMDirichletSimilarity
LMJelinekMercerSimilarityFactory	Factory for LMJelinekMercerSimilarity
LoadAdminUiServlet	A simple servlet to load the Solr Admin UI
LoadAverageCircuitBreaker	Tracks current system load average and triggers if the specified threshold is breached.
LocaleUtils
LocalFileSystemRepository	A concrete implementation of BackupRepository interface supporting backup/restore of Solr indexes to a local file-system.
LocalSolrQueryRequest
LocalStatsCache	Default implementation that simply ignores global term statistics, and always uses local term statistics.
LocalStatsSource	Convenience class that wraps a local SolrIndexSearcher to provide local statistics.
LockTree	This is a utility class that offers fine grained locking for various Collection Operations This class is designed for single threaded operation.
Log4j2Watcher
Log4j2Watcher.Log4j2Appender
Log4j2Watcher.Log4j2Info
LogByteSizeMergePolicyFactory	A MergePolicyFactory for LogByteSizeMergePolicy objects.
LogDocMergePolicyFactory	A MergePolicyFactory for LogDocMergePolicy objects.
LoggerInfo	Wrapper class for Logger implementations
LoggingHandler	A request handler to show which loggers are registered and allows you to set them
LoggingInfoStream	An InfoStream implementation which passes messages on to Solr's logging.
LogUpdateProcessorFactory	A logging processor.
LogWatcher<E>	A Class to monitor Logging events and hold N events in memory
LogWatcherConfig	Defines the configuration of a LogWatcher
LongIterator	A long-based iterator.
LongPointField	PointField implementation for Long values.
LongPriorityQueue	A native long priority queue.
LongValue
LongValueFieldType	Marker interface for long-valued field types.
Lookup3Signature
LookupFactory	Suggester factory for creating Lookup instances.
LowerCaseTokenizer	Deprecated. Use LetterTokenizer and LowerCaseFilter
LowerCaseTokenizerFactory	Deprecated. Use LetterTokenizerFactory and LowerCaseFilterFactory
LRUStatsCache	Unlike ExactStatsCache this implementation preserves term stats across queries in a set of LRU caches (with the same life-cycle as SolrIndexSearcher), and based on surface features of a query it determines the need to send additional requests to retrieve local term and collection statistics from shards.
LuceneDefaultCodecFactory	Simple factory for returning the Lucene default Codec
LuceneQParser
LuceneQParserPlugin	Parse Solr's variant on the Lucene QueryParser syntax.
LukeRequestHandler	Exposes the internal lucene index.
MacroExpander
MainEndResultTransformer	Implementation of EndResultTransformer that transforms the grouped result into the main result list in the response.
MaintainRoutedAliasCmd
ManagedIndexSchema	Solr-managed schema - non-user-editable, but can be mutable via internal and external REST API requests.
ManagedIndexSchema.FieldExistsException
ManagedIndexSchema.SchemaChangedInZkException
ManagedIndexSchemaFactory	Factory for ManagedIndexSchema
ManagedResource	Supports Solr components that have external data that needs to be managed using the REST API.
ManagedResource.ChildResourceSupport	Marker interface to indicate a ManagedResource implementation class also supports managing child resources at path: /<resource>/{child}
ManagedResourceObserver	Allows a Solr component to register as an observer of important ManagedResource events, such as when the managed data is loaded.
ManagedResourceStorage	Abstract base class that provides most of the functionality needed to store arbitrary data for managed resources.
ManagedResourceStorage.FileStorageIO	Local file-based storage implementation.
ManagedResourceStorage.InMemoryStorageIO	Memory-backed storage IO; not really intended for storage large amounts of data in production, but useful for testing and other transient workloads.
ManagedResourceStorage.JsonStorage	Default storage implementation that uses JSON as the storage format for managed data.
ManagedResourceStorage.StorageIO	Hides the underlying storage implementation for data being managed by a ManagedResource.
ManagedResourceStorage.ZooKeeperStorageIO	ZooKeeper based storage implementation that uses the SolrZkClient provided by the CoreContainer.
ManagedSchemaDiff	Utility methods for comparing managed index schemas
ManagedStopFilterFactory	TokenFilterFactory that uses the ManagedWordSetResource implementation for managing stop words using the REST API.
ManagedSynonymFilterFactory	Deprecated. Use ManagedSynonymGraphFilterFactory instead, but be sure to also use FlattenGraphFilterFactory at index time (not at search time) as well.
ManagedSynonymFilterFactory.SynonymManager	ManagedResource implementation for synonyms, which are so specialized that it makes sense to implement this class as an inner class as it has little application outside the SynonymFilterFactory use cases.
ManagedSynonymGraphFilterFactory	TokenFilterFactory and ManagedResource implementation for doing CRUD on synonyms using the REST API.
ManagedSynonymGraphFilterFactory.SynonymManager	ManagedResource implementation for synonyms, which are so specialized that it makes sense to implement this class as an inner class as it has little application outside the SynonymFilterFactory use cases.
ManagedWordSetResource	ManagedResource implementation for managing a set of words using the REST API; useful for managing stop words and/or protected words for analysis components like the KeywordMarkerFilter.
MapInitializedPlugin	A plugin that can be initialized with a Map<String,String>
MapListener<K,V>	Wraps another map, keeping track of each key that was seen via MapListener.get(Object) or MapListener.remove(Object).
MapPluginLoader<T extends MapInitializedPlugin>
MatchCostQuery	Wraps a Query to customize the TwoPhaseIterator.matchCost().
MaxFieldValueUpdateProcessorFactory	An update processor that keeps only the maximum value from any selected fields where multiple values are found.
MaxScoreCollector	A Collector for the maximum score value.
MaxScoreQParser
MaxScoreQParserPlugin	Parses a query like Lucene query parser, but scoring with max score, not sum Accepts the "tie" request parameter as with dismax.
MD5Signature
MDCLoggingContext	Set's per thread context info for logging.
MDCSnapshot	Takes a 'snapshot' of the current MDC context map which is restored on (auto) close.
MediaTypeOverridingFilter	Overrides the content-type of the response based on an optional user-provided 'wt' parameter
MemoryCircuitBreaker	Tracks the current JVM heap usage and triggers if a moving heap usage average over 30 seconds exceeds the defined percentage of the maximum heap size allocated to the JVM.
MemOutputStream
MergeIndexes	Implementation of V2 API interface MergeIndexesApi for merging one or more indexes to another index.
MergeIndexesCommand	A merge indexes command encapsulated in an object.
MergePolicyFactory	A factory for creating a MergePolicy.
MergePolicyFactoryArgs
MergeStrategy	The MergeStrategy class defines custom merge logic for distributed searches.
MessageBodyReaders	A collection point for various MessageBodyReader implementations.
MessageBodyReaders.CachingDelegatingMessageBodyReader	Caches the deserialized request body in the ContainerRequestContext for use later in the request lifecycle.
MessageBodyReaders.CachingJsonMessageBodyReader	A JSON MessageBodyReader that caches request bodies for use later in the request lifecycle.
MessageBodyWriters	A collection of thin Jersey shims around Solr's existing QueryResponseWriter interface
MessageBodyWriters.BaseMessageBodyWriter
MessageBodyWriters.CsvMessageBodyWriter
MessageBodyWriters.JavabinMessageBodyWriter
MessageBodyWriters.RawMessageBodyWriter
MessageBodyWriters.XmlMessageBodyWriter
Method
Metric<T>	Metric-related attribute of a node or replica.
MetricImpl<T>	Base class for Metric implementations.
MetricsCollectorHandler	Handler to collect and aggregate metric reports.
MetricsConfig
MetricsConfig.CacheConfig
MetricsConfig.MetricsConfigBuilder
MetricsHandler	Request handler to return metrics
MetricsMap	Dynamically constructed map of metrics, intentionally different from MetricSet where each metric had to be known in advance and registered separately in MetricRegistry.
MetricSuppliers	Helper class for constructing instances of MetricRegistry.MetricSupplier based on plugin configuration.
MetricSuppliers.DefaultCounterSupplier	Default Counter supplier.
MetricSuppliers.DefaultHistogramSupplier	Default supplier of Histogram instances, with configurable reservoir.
MetricSuppliers.DefaultMeterSupplier	Default Meter supplier.
MetricSuppliers.DefaultTimerSupplier	Default supplier of Timer instances, with configurable clock and reservoir.
MetricSuppliers.NoOpCounterSupplier	No-op implementation of Counter supplier.
MetricSuppliers.NoOpGauge	No-op implementation of Gauge.
MetricSuppliers.NoOpHistogramSupplier	No-op implementation of Histogram supplier.
MetricSuppliers.NoOpMeterSupplier	No-op implementation of Meter supplier.
MetricSuppliers.NoOpMetric	Marker interface for all no-op metrics.
MetricSuppliers.NoOpTimerSupplier	No-op implementation of Timer supplier.
MetricUtils	Metrics specific utility functions.
MigrateCmd
MigrateDocsAPI	V2 API for migrating docs from one collection to another.
MigrateReplicas	V2 API for migrating replicas from a set of nodes to another set of nodes.
MigrateReplicasCmd
MinFieldValueUpdateProcessorFactory	An update processor that keeps only the minimum value from any selected fields where multiple values are found.
MinHashQParser	The query parser can be used in two modes 1) where text is analysed and generates min hashes as part of normal lucene analysis 2) where text is pre-analysed and hashes are added as string to the index An analyzer can still be defined to support text based query against the text field
MinHashQParserPlugin	QParserPlugin based on MinHashQParser.
MinimizeCoresPlacementFactory	Factory for creating MinimizeCoresPlacementFactory.MinimizeCoresPlacementPlugin, a Placement plugin implementing placing replicas to minimize number of cores per Node, while not placing two replicas of the same shard on the same node.
MinMaxAgg
MissingAgg	AggValueSource to compute missing counts for given ValueSource
MLTContentQParserPlugin
MLTQParserPlugin	Usage: {!mlt qf=queryField1,queryField2}uniqueId
MMapDirectoryFactory	Directly provide MMapDirectory instead of relying on FSDirectory.open(java.nio.file.Path).
MockSearchableSolrClient	Simple mock client that collects added documents and supports simple search by id (both {!term f=id} and id: syntax is supported) or *:*.
ModificationRequest	Collection modification request.
ModificationRequestImpl	Helper class to create modification request instances.
ModifyBasicAuthConfigAPI	V2 API to modify configuration for Solr's BasicAuthPlugin
ModifyCollectionAPI	V2 API for modifying collections.
ModifyConfigComponentAPI	V2 APIs for creating, updating, or deleting individual components in a collection configuration.
ModifyMultiPluginAuthConfigAPI	V2 API to modify configuration options for the MultiAuthPlugin.
ModifyNoAuthPluginSecurityConfigAPI	V2 API for POST requests received when no authentication plugin is active.
ModifyNoAuthzPluginSecurityConfigAPI	V2 API for POST requests received when no authorization plugin is active.
ModifyParamSetAPI	V2 APIs for creating, modifying, or deleting paramsets.
ModifyRuleBasedAuthConfigAPI	V2 API to modify configuration options for the RuleBasedAuthorizationPlugin.
ModuleUtils	Parses the list of modules the user has requested in solr.xml, property solr.modules or environment SOLR_MODULES.
MoreLikeThisAPI	V2 API for performing a more like this request to a solr collection.
MoreLikeThisComponent	TODO!
MoreLikeThisHandler	Solr MoreLikeThis --
MoreLikeThisHandler.InterestingTerm
MoreLikeThisHandler.MoreLikeThisHelper	Helper class for MoreLikeThis that can be called from other request handlers
MoveReplicaAPI	V2 API for moving a collection replica to a different physical node.
MoveReplicaCmd
MultiAuthPlugin	Authentication plugin that supports multiple Authorization schemes, such as Bearer and Basic.
MultiAuthRuleBasedAuthorizationPlugin	Authorization plugin designed to work with the MultiAuthPlugin to support different AuthorizationPlugin per scheme.
MultiDestinationAuditLogger	Audit logger that chains other loggers.
MultiStringFunction	Abstract ValueSource implementation which wraps multiple ValueSources and applies an extendible string function to their values.
MultiValueTermOrdinalCollector	Populates a bitset of (top-level) ordinals based on field values in a multi-valued field.
NamedListInitializedPlugin	A plugin that can be initialized with a NamedList
NamedListPluginLoader<T extends NamedListInitializedPlugin>
NestedQParserPlugin	Create a nested query, with the ability of that query to redefine its type via local parameters.
NestedRequestHandler	An interface for RequestHandlers need to handle all paths under its registered path
NestedUpdateProcessorFactory	Adds fields to nested documents to support some nested search requirements.
NestPathField	To be used for field IndexSchema.NEST_PATH_FIELD_NAME for enhanced nested doc information.
NIOFSDirectoryFactory	Factory to instantiate NIOFSDirectory
Node	Representation of a SolrCloud node or server in the SolrCloud cluster.
NodeConfig
NodeConfig.NodeConfigBuilder
NodeConfigClusterPluginsSource	Plugin configurations that are defined in solr.xml.
NodeHealthAPI	V2 API for checking the health of the receiving node.
NodeLoggingAPI	V2 APIs for getting or setting log levels on an individual node.
NodeLoggingAPI.ListLevelsResponse	Response format for the 'GET /api/node/logging/levels' API.
NodeLoggingAPI.LoggingResponse	Generic logging response that includes the name of the log watcher (e.g.
NodeLoggingAPI.LogLevelChange	A user-requested modification in the level that a specified logger reports at.
NodeLoggingAPI.LogLevelInfo	Representation of a single logger and its current state.
NodeLoggingAPI.LogMessageInfo	Metadata about the log messages returned by the 'GET /api/node/logging/messages' API
NodeLoggingAPI.LogMessagesResponse	Response format for the 'GET /api/node/logging/messages' API.
NodeLoggingAPI.SetThresholdRequestBody	The request body for the 'PUT /api/node/logging/messages/threshold' API.
NodeMetric<T>	Node metric identifier, corresponding to a node-level metric registry and the internal metric name.
NodeMetric.Registry	Registry options for node metrics.
NodeMetricImpl<T>	Node metric identifier, corresponding to a node-level metric registry and the internal metric name.
NodeMutator
NodePropertiesAPI	V2 API for listing system properties for each node.
NodeRoles
NodeRoles.Role
NodesDownEvent	Event generated when some nodes went down.
NodesUpEvent	Event generated when some nodes went up.
NodeSystemInfoAPI	V2 API for getting "system" information from the receiving node.
NodeThreadsAPI	V2 API for triggering a thread dump on the receiving node.
NoMergePolicyFactory
NoOpDistributingUpdateProcessorFactory	A No-Op implementation of DistributingUpdateProcessorFactory that allways returns the next processor instead of inserting a new URP in front of it.
NoOpProducer	No-op implementation of ClusterEventProducer.
NoOpRegenerator	Cache regenerator that just populates the new cache with the old items.
NotFoundExceptionMapper	An ExceptionMapper for the exception produced by JAX-RS when no match could be found for an incoming request.
NotFoundRequestHandler	Does nothing other than showing a 404 message
NRTCachingDirectoryFactory	Factory to instantiate NRTCachingDirectory
NumberType
NumberUtils
NumericFieldType
NumericHidingLeafReader	Deprecated.
NumericValueFieldType	Marker interface for numeric-valued field types.
ObjectUtil
ObjectUtil.ConflictHandler
OcmhCollectionCommandContext	Context passed to Collection API commands when they execute in the Overseer.
OffsetCorrector
OpenExchangeRatesOrgProvider	Exchange Rates Provider for CurrencyField and CurrencyFieldType capable of fetching & parsing the freely available exchange rates from openexchangerates.org
OperatingSystemMetricSet	This is an extended replacement for FileDescriptorRatioGauge - that class uses reflection and doesn't work under Java 9.
OrderedExecutor
OrderedNodePlacementPlugin
OrderedNodePlacementPlugin.WeightedNode	A class that determines the weight of a given node and the replicas that reside on it.
OrdFieldSource	Obtains the ordinal of the field value from LeafReader.getSortedDocValues(java.lang.String).
Overseer	Cluster leader.
Overseer.Message
Overseer.OverseerThread
OverseerAction	Enum of actions supported by the overseer only.
OverseerCollectionConfigSetProcessor	An OverseerTaskProcessor that handles: 1) collection-related Overseer messages 2) configset-related Overseer messages
OverseerCollectionMessageHandler	A OverseerMessageHandler that handles Collections API related overseer messages.
OverseerConfigSetMessageHandler	A OverseerMessageHandler that handles ConfigSets API related overseer messages.
OverseerMessageHandler	Interface for processing messages received by an OverseerTaskProcessor
OverseerMessageHandler.Lock
OverseerNodePrioritizer	Responsible for prioritization of Overseer nodes, for example with the ADDROLE collection command.
OverseerOperationAPI	V2 API for triggering a node to rejoin leader election for the 'overseer' role.
OverseerRoleCmd
OverseerSolrResponse
OverseerSolrResponseSerializer
OverseerStatusCmd	This command returns stats about the Overseer, the cluster state updater and collection API activity occurring within the current Overseer node (this is important because distributed operations occurring on other nodes are not included in these stats, for example distributed cluster state updates or Per Replica States updates).
OverseerTaskProcessor	A generic processor run in the Overseer, used for handling items added to a distributed work queue.
OverseerTaskProcessor.OverseerMessageHandlerSelector	An interface to determine which OverseerMessageHandler handles a given message.
OverseerTaskQueue	A ZkDistributedQueue augmented with helper methods specific to the overseer task queues.
OverseerTaskQueue.QueueEvent
PackageAPI	This implements the public end points (/api/cluster/package) of package API.
PackageAPI.Packages
PackageAPI.PkgVersion
PackageListeners
PackageListeners.Listener
PackageListeners.Listener.Ctx
PackageListeningClassLoader	A SolrClassLoader that is designed to listen to a set of packages.
PackageManager	Handles most of the management of packages that are already installed in Solr.
PackagePluginHolder<T>
PackageRepository	Abstract class for a repository, holding SolrPackage items.
PackageTool
PackageUtils
ParseBooleanFieldUpdateProcessorFactory	Attempts to mutate selected fields that have only CharSequence-typed values into Boolean values.
ParseDateFieldUpdateProcessorFactory	Attempts to mutate selected fields that have only CharSequence-typed values into Date values.
ParseDoubleFieldUpdateProcessorFactory	Attempts to mutate selected fields that have only CharSequence-typed values into Double values.
ParseException	This exception is thrown when parse errors are encountered.
ParseFloatFieldUpdateProcessorFactory	Attempts to mutate selected fields that have only CharSequence-typed values into Float values.
ParseIntFieldUpdateProcessorFactory	Attempts to mutate selected fields that have only CharSequence-typed values into Integer values.
ParseLongFieldUpdateProcessorFactory	Attempts to mutate selected fields that have only CharSequence-typed values into Long values.
ParseNumericFieldUpdateProcessorFactory	Abstract base class for numeric parsing update processor factories.
PathExcluder	Denotes an object, usually a servlet that denies access to some paths based on the supplied patterns.
PayloadCheckQParserPlugin
PayloadObj<T>	Holds the deserialized object for each command and also holds request , response objects
PayloadScoreQParserPlugin	Creates a PayloadScoreQuery wrapping a SpanQuery created from the input value, applying text analysis and constructing SpanTermQuery or SpanNearQuery based on number of terms.
PayloadUtils
PeerSync	This class is useful for performing peer to peer synchronization of recently indexed update commands during recovery process.
PeerSync.MissedUpdatesFinder	Helper class for doing comparison ourUpdates and other replicas's updates to find the updates that we missed
PeerSync.MissedUpdatesRequest	Result of PeerSync.MissedUpdatesFinder
PeerSync.PeerSyncResult
PeerSyncWithLeader
PeerSyncWithLeader.MissedUpdatesFinder	Helper class for doing comparison ourUpdates and other replicas's updates to find the updates that we missed
PercentileAgg
PercentileAgg.Parser
PermissionName	Associates the resource method with a particular PermissionNameProvider value.
PermissionNameProvider	A requestHandler should implement this interface to provide the well known permission at request time
PermissionNameProvider.Name
PHPResponseWriter
PHPSerializedResponseWriter	A description of the PHP serialization format can be found here: http://www.hurring.com/scott/code/perl/serialize/
PhrasesIdentificationComponent	A component that can be used in isolation, or in conjunction with QueryComponent to identify & score "phrases" found in the input string, based on shingles in indexed fields.
PhrasesIdentificationComponent.Phrase	Model the data known about a single (candidate) Phrase -- which may or may not be indexed
PhrasesIdentificationComponent.PhrasesContextData	Simple container for all request options and data this component needs to store in the Request Context
PingRequestHandler	Ping Request Handler for reporting SolrCore health to a Load Balancer.
PingRequestHandler.ACTIONS
PivotFacet	Models a single instance of a "pivot" specified by a FacetParams.FACET_PIVOT param, which may contain multiple nested fields.
PivotFacetField	Models a single field somewhere in a hierarchy of fields as part of a pivot facet.
PivotFacetFieldValueCollection	Emcapsulates a collection of PivotFacetValues associated with a PivotFacetField withs pecial tracking of a PivotFacetValue corrisponding to the null value when FacetParams.FACET_MISSING is used.
PivotFacetFieldValueCollection.PivotFacetCountComparator	Sorts PivotFacetValue instances by their count
PivotFacetFieldValueCollection.PivotFacetValueComparator	Sorts PivotFacetValue instances by their value
PivotFacetHelper
PivotFacetProcessor	Processes all Pivot facet logic for a single node -- both non-distrib, and per-shard
PivotFacetValue	Models a single (value, count) pair that will exist in the collection of values for a PivotFacetField parent.
PivotListEntry	Enum for modeling the elements of a (nested) pivot entry as expressed in a NamedList
PKIAuthenticationPlugin
PKIAuthenticationPlugin.PKIHeaderData
PlacementContext	Placement context makes it easier to pass around and access main placement-related components.
PlacementException	Exception thrown by a PlacementPlugin when it is unable to compute placement for whatever reason (except an InterruptedException that PlacementPlugin.computePlacement(org.apache.solr.cluster.placement.PlacementRequest, org.apache.solr.cluster.placement.PlacementContext) is also allowed to throw).
PlacementModificationException	Exception thrown when a placement modification is rejected by the placement plugin.
PlacementPlan	A fully specified plan or instructions for placement, deletion or move to be applied to the cluster.
PlacementPlanFactory	Allows plugins to create PlacementPlans telling the Solr layer where to create replicas following the processing of a PlacementRequest.
PlacementPlanFactoryImpl	Simple implementation of PlacementPlanFactory.
PlacementPlugin	Implemented by external plugins to control replica placement and movement on the search cluster (as well as other things such as cluster elasticity?) when cluster changes are required (initiated elsewhere, most likely following a Collection API call).
PlacementPluginAssignStrategy	This assign strategy delegates placement computation to "plugin" code.
PlacementPluginConfig	Configuration beans should use this interface to define public (mutable) configuration properties.
PlacementPluginFactory<T extends PlacementPluginConfig>	Factory implemented by client code and configured in container plugins (see ContainerPluginsApi.editAPI) allowing the creation of instances of PlacementPlugin to be used for replica placement computation.
PlacementPluginFactory.NoConfig	Useful type for plugins that don't use any configuration.
PlacementPluginFactoryLoader	Utility class to work with PlacementPluginFactory plugins.
PlacementRequest	A cluster related placement request that Solr asks a PlacementPlugin plugin to resolve and compute a PlacementPlan placing one or more Replica's of one or more Shard's of an existing SolrCollection.
PlacementRequestImpl
PluginBag<T>	This manages the lifecycle of a set of plugin of the same type .
PluginBag.JaxrsResourceToHandlerMappings	Allows JAX-RS 'filters' to find the requestHandler (if any) associated particular JAX-RS resource classes
PluginBag.PluginHolder<T>	An indirect reference to a plugin.
PluginInfo	An Object which represents a Plugin of any type
PluginInfo.ClassName
PluginInfoHandler
PluginInfoInitialized	A plugin that can be initialized with a PluginInfo
PointField	Provides field types to support for Lucene's IntPoint, LongPoint, FloatPoint and DoublePoint.
PointMerger	Merge multiple numeric point fields (segments) together.
PointMerger.ValueIterator
PointType	A point type that indexes a point in an n-dimensional space as separate fields and supports range queries.
PossibilityIterator	Given a list of possible Spelling Corrections for multiple mis-spelled words in a query, This iterator returns Possible Correction combinations ordered by reasonable probability that such a combination will return actual hits if re-queried.
PossibilityIterator.RankedSpellPossibility
PostFilter	The PostFilter interface provides a mechanism to further filter documents after they have already gone through the main query and other filters.
PostLogsTool	A command line tool for indexing Solr logs in the out-of-the-box log format.
PostLogsTool.LogRecordReader
PostRequestDecorationFilter	Applies standard post-processing decorations to a SolrJerseyResponse that are needed on all responses.
PostRequestLoggingFilter
PostTool
PostTool.PageFetcherResult	Utility class to hold the result form a page fetch
PreAnalyzedField	Pre-analyzed field type provides a way to index a serialized token stream, optionally with an independent stored value of a field.
PreAnalyzedField.ParseResult	This is a simple holder of a stored part and the collected states (tokens with attributes).
PreAnalyzedField.PreAnalyzedParser	Parse the input and return the stored part and the tokens with attributes.
PreAnalyzedUpdateProcessorFactory	An update processor that parses configured fields of any document being added using PreAnalyzedField with the configured format parser.
PrefixQParserPlugin	Create a prefix query from the input value.
PrepareCoreRecoveryAPI	Internal V2 API used to prepare a core for recovery.
PrimitiveFieldType	Abstract class defining shared behavior for primitive types Intended to be used as base class for non-analyzed fields like int, float, string, date etc, and set proper defaults for them
PrimUtils	Utilities for primitive Java data types.
PrimUtils.IntComparator
PrintWriterWrapper	Wrapper for PrintWriter that delegates to constructor arg
PropertiesInputStream
PropertiesRequestHandler
PublicKeyHandler
PythonResponseWriter
QParser	Note: This API is experimental and may change in non backward-compatible ways in the future
QParserPlugin
QueryCancellationComponent	Responsible for handling query cancellation requests
QueryCancellationHandler	Handles requests for query cancellation for cancellable queries
QueryCommand
QueryCommand	A query request command to avoid having to change the method signatures if we want to pass additional information to the searcher.
QueryCommand.Builder
QueryCommandResult	Encapsulates TopDocs and the number of matches.
QueryComponent	TODO!
QueryComponent.ScoreAndDoc	Fake scorer for a single document
QueryContext
QueryConverter	The QueryConverter is an abstract base class defining a method for converting input "raw" queries into a set of tokens for spell checking.
QueryElevationComponent	A component to elevate some documents to the top of the result set.
QueryElevationComponent.ElevatingQuery	Query triggering elevation.
QueryElevationComponent.Elevation	Elevation of some documents in search results, with potential exclusion of others.
QueryElevationComponent.ElevationProvider	Provides the elevations defined for queries.
QueryElevationComponent.InitializationExceptionCause
QueryElevationComponent.TrieSubsetMatcher<E extends Comparable<? super E>,M>	Matches a potentially large collection of subsets with a trie implementation.
QueryElevationComponent.TrieSubsetMatcher.Builder<E extends Comparable<? super E>,M>
QueryLimits	Represents the limitations on the query.
QueryLimitsExceededException
QueryParser
QueryParser.Operator	The default operator for parsing queries.
QueryParserConstants	Token literal values and constants.
QueryParserTokenManager	Token Manager.
QueryParsing	Collection of static utilities useful for query parsing.
QueryRateLimiter	Implementation of RequestRateLimiter specific to query request types.
QueryResponseWriter	Implementations of QueryResponseWriter are used to format responses to query requests.
QueryResponseWriterUtil	Static utility methods relating to QueryResponseWriters
QueryResult	The result of a search.
QueryResultKey	A hash key encapsulating a query, a list of filters, and a sort
QuerySenderListener
QueryUtils
RAMDirectoryFactory	Factory to instantiate RAM-resident directory implementation.
RandomPlacementFactory	Factory for creating RandomPlacementFactory.RandomPlacementPlugin, a placement plugin implementing random placement for new collection creation while preventing two replicas of same shard from being placed on same node..
RandomPlacementFactory.RandomPlacementPlugin
RandomSortField	Utility Field used for random sorting.
RandomSortField.RandomValueSource
RangeFacetProcessor	Processor for Range Facets
RangeFacetRequest	Encapsulates a single facet.range request along with all its parameters.
RangeFacetRequest.FacetRange	Represents a single facet range (or gap) for which the count is to be calculated
RankField	RankFields can be used to store scoring factors to improve document ranking.
RankQParserPlugin	RankQParserPlugin can be used to introduce document-depending scoring factors to ranking.
RankQParserPlugin.RankQParser
RankQuery	Note: This API is experimental and may change in non backward-compatible ways in the future
RateLimiterConfig
RateLimitManager	This class is responsible for managing rate limiting per request type.
RateLimitManager.Builder
RawQParserPlugin	Create a term query from the input value without any text analysis or transformation whatsoever.
RawResponseWriter	Writes a ContentStream directly to the output.
RawValueTransformerFactory
RealTimeGetAPI	V2 API for fetching the latest (possibly uncommitted) version of one or more documents.
RealTimeGetComponent
RealTimeGetComponent.Resolution	Lookup strategy for some methods on this class.
RealTimeGetHandler
RebalanceLeadersAPI	V2 API for balancing shard leaders in a collection across nodes.
RecordHandler
RecordingJSONParser
RecoveringCoreTermWatcher	Start recovery of a core if its term is less than leader's term
RecoveryStrategy	This class may change in future and customisations are not supported between versions in terms of API or back compat behaviour.
RecoveryStrategy.Builder
RecoveryStrategy.RecoveryListener
RedirectServlet	A Simple redirection servlet to help us deprecate old UI elements
RefCounted<Type>	Keep track of a reference count on a resource and close it when the count hits zero.
RefreshCollectionMessage	Refresh the ClusterState for a given collection.
RegexBytesRefFilter	An implementation of Predicate which returns true if the BytesRef matches the supplied regular expression.
RegexFileFilter	Accepts any file whose name matches the pattern
RegexFragmenter	Fragmenter that tries to produce snippets that "look" like a regular expression.
RegexpBoostProcessor	A processor which will match content of "inputField" against regular expressions found in "boostFilename", and if it matches will return the corresponding boost value from the file and output this to "boostField" as a double value.
RegexpBoostProcessorFactory	Factory which creates RegexBoostProcessors
RegexReplaceProcessorFactory	An updated processor that applies a configured regex to any CharSequence values found in the selected fields, and replaces any matches with the configured replacement string.
ReindexCollectionCmd	Reindex a collection, usually in order to change the index schema.
ReindexCollectionCmd.Cmd
ReindexCollectionCmd.State
RejoinLeaderElectionAPI	V2 API for triggering a core to rejoin leader election for the shard it constitutes.
RelatednessAgg	An aggregation function designed to be nested under other (possibly deeply nested) facets for the purposes of computing the "relatedness" of facet buckets relative to "foreground" and "background" sets -- primarily for the purpose of building "Semantic Knowledge Graphs"
ReloadCollectionAPI	V2 API implementation for reloading collections.
ReloadCore	V2 API implementation for reloading an individual core.
RemoveBlankFieldUpdateProcessorFactory	Removes any values found which are CharSequence with a length of 0.
RenameCmd
RenameCollection	V2 API implementation to "rename" an existing collection
RenameCore	V2 API for renaming an existing Solr core.
RenameCoreAPI	V2 API for renaming an existing Solr core.
RenameCoreAPI.RenameCorePayload
RenameFieldTransformer	Return a field with a name that is different that what is indexed
ReplaceNode	V2 API for recreating replicas in one node (the source) on another node(s) (the target).
ReplaceNodeCmd
Replica	An instantiation (or one of the copies) of a given Shard of a given SolrCollection.
Replica.ReplicaState
Replica.ReplicaType	The order of this enum is important from the most to least "important" replica type.
ReplicaMetric<T>	Replica metric identifier, corresponding to one of the internal replica-level metric names (as reported in solr.core.[collection].[replica] registry)
ReplicaMetricImpl<T>	Replica metric identifier, corresponding to one of the internal replica-level metric names (as reported in solr.core.[collection].[replica] registry)
ReplicaMetrics	Strongly-typed replica-level metrics.
ReplicaMigrationUtils
ReplicaMutator
ReplicaPlacement	Placement decision for a single Replica.
ReplicateFromLeader
ReplicationAPIBase	A common parent for "replication" (i.e.
ReplicationHandler	A Handler which provides a REST API for replication and serves replication requests from Followers.
ReplicationHandler.PollListener
ReplicationHandler.ReplicationHandlerConfig
ReporterClientCache<T>	Simple cache for reusable service clients used by some implementations of SolrMetricReporter.
ReporterClientCache.ClientProvider<T>	Provide an instance of service client.
RepositoryManager	Handles most of the management of repositories and packages present in external repositories.
RequestApplyCoreUpdatesAPI	Internal V2 API used to apply updates to a core.
RequestBufferUpdatesAPI	Internal V2 API used to start update-buffering on the specified core.
RequestContextKeys	Keys used to store and retrieve values from the Jersey request context.
RequestCoreRecoveryAPI	Internal V2 API triggering recovery on a core.
RequestHandlerBase	Base class for all request handlers.
RequestHandlerBase.HandlerMetrics	Metrics for this handler.
RequestHandlers
RequestHandlerUtils	Common helper functions for RequestHandlers
RequestMetricHandling	A request and response filter used to initialize and report per-request metrics.
RequestMetricHandling.PostRequestMetricsFilter	Adjusts post-request metrics (timing, etc.)for individual Jersey requests.
RequestMetricHandling.PreRequestMetricsFilter	Sets up the metrics-context for individual requests
RequestParams	The class encapsulates the request time parameters .
RequestParams.ParamSet
RequestParams.VersionedParams
RequestRateLimiter	Handles rate limiting for a specific request type.
RequestSyncShardAPI	Internal V2 API used to request a core sync with its shard leader.
RequestUtil
ReRankCollector
ReRankCollector.BoostedComp
ReRankOperator
ReRankQParserPlugin
ReRankScaler
ReRankScaler.MinMaxExplain
ReRankScaler.ReRankScalerExplain
ReRankWeight	A Weight used by reranking queries.
ResponseBuilder	This class is experimental and will be changing in the future.
ResponseLogComponent	Adds to the log file the document IDs that are sent in the query response.
ResponseUtils	Response helper methods.
RestManager	Supports runtime mapping of REST API endpoints to ManagedResource implementations; endpoints can be registered at either the /schema or /config base paths, depending on which base path is more appropriate for the type of managed resource.
RestManager.ManagedEndpoint	Request handling needs a lightweight object to delegate a request to.
RestManager.Registry	Per-core registry of ManagedResources found during core initialization.
RestoreCmd
RestoreCollectionAPI	V2 API for restoring data into a collection
RestoreCollectionAPI.RestoreCollectionRequestBody	Request body for the v2 "restore collection" API.
RestoreCore	V2 API implementation for restoring a previously taken backup to a core
RestoreCore
ResultContext	A class to hold the QueryResult and the Query
ResultEntry
ReturnFields	A class representing the return fields
ReversedWildcardFilter	This class produces a special form of reversed tokens, suitable for better handling of leading wildcards.
ReversedWildcardFilterFactory	Factory for ReversedWildcardFilter-s.
ReverseOrdFieldSource	Obtains the ordinal of the field value from LeafReader.getSortedDocValues(java.lang.String) and reverses the order.
RollbackUpdateCommand
RoutedAlias
RoutedAlias.Action
RoutedAliasUpdateProcessor	Distributes update requests to a series of collections partitioned by a "routing" field.
RptWithGeometrySpatialField	A Solr Spatial FieldType based on CompositeSpatialStrategy.
RTimer	A simple timer.
RTimer.TimerImpl
RTimerTree	A recursive timer.
RubyResponseWriter
RuleBasedAuthorizationPlugin	Original implementation of Rule Based Authz plugin which configures user/role mapping in the security.json configuration
RuleBasedAuthorizationPluginBase	Base class for rule based authorization plugins
RunExampleTool	Supports an interactive session with the user to launch (or relaunch the -e cloud example)
RunUpdateProcessorFactory	Executes the update commands using the underlying UpdateHandler.
SafeXMLParsing	Some utility methods for parsing XML in a safe way.
SampleDocuments
SampleDocumentsLoader
SchemaAware	An interface that can be extended to provide a callback mechanism for informing an IndexSchema instance of changes to it, dynamically performed at runtime.
SchemaBulkModifyAPI	V2 APIs for creating, updating, or deleting individual components in a collection's schema.
SchemaCodecFactory	Per-field CodecFactory implementation, extends Lucene's and returns postings format implementations according to the schema configuration.
SchemaDesignerAPI	All V2 APIs that have a prefix of /api/schema-designer/
SchemaDesignerConstants
SchemaField	Encapsulates all information about a Field in a Solr Schema
SchemaHandler
SchemaManager	A utility class to manipulate schema using the bulk mode.
SchemaManager.OpType
SchemaSimilarityFactory	SimilarityFactory that returns a global PerFieldSimilarityWrapper that delegates to the field type, if it's configured.
SchemaSuggester
SchemaXmlResponseWriter
SchemaXmlWriter
ScoreAugmenter	Simple Augmenter that adds the score
ScoreJoinQParserPlugin	Create a query-time join query with scoring.
ScoreOrderFragmentsBuilder
SearchComponent	TODO!
SearchGroupsFieldCommand	Creates all the collectors needed for the first phase and how to handle the results.
SearchGroupsFieldCommand.Builder
SearchGroupsFieldCommandResult	Encapsulates the result of a SearchGroupsFieldCommand command
SearchGroupShardResponseProcessor	Concrete implementation for merging SearchGroup instances from shard responses.
SearchGroupsRequestFactory	Concrete implementation of ShardRequestFactory that creates ShardRequest instances for getting the search groups from all shards.
SearchGroupsResultTransformer	Implementation for transforming SearchGroup into a NamedList structure and visa versa.
SearchHandler	Refer SOLR-281
SecurityConfHandler
SecurityConfHandler.SecurityConfig	Object to hold security.json as nested Map<String,Object> and optionally its version.
SecurityConfHandlerLocal	Security Configuration Handler which works on standalone local files
SecurityConfHandlerZk	Security Configuration Handler which works with Zookeeper
SecurityPluginHolder<T>
SegmentsInfoRequestHandler	This handler exposes information about last commit generation segments
ServletInputStreamWrapper	Provides a convenient extension of the ServletInputStream class that can be subclassed by developers wishing to adapt the behavior of a Stream.
ServletOutputStreamWrapper	Provides a convenient extension of the ServletOutputStream class that can be subclassed by developers wishing to adapt the behavior of a Stream.
ServletUtils	Various Util methods for interaction on servlet level, i.e.
ServletUtils.ClosedServletInputStream
ServletUtils.ClosedServletOutputStream
SetAliasPropCmd
Sha256AuthenticationProvider
Shard	Shard in a SolrCollection, i.e.
Shard.ShardState
ShardAugmenterFactory
ShardAugmenterFactory.Style
ShardBackupId	Represents the ID of a particular backup point for a particular shard.
ShardBackupMetadata	Represents the shard-backup metadata file.
ShardBackupMetadata.BackedFile
ShardDoc
ShardFieldSortedHitQueue
ShardHandler
ShardHandlerFactory
ShardMetrics	Shard-level metrics.
ShardRequest
ShardRequestFactory	Responsible for creating shard requests to the shards in the cluster to perform distributed grouping.
ShardResponse
ShardResponseProcessor	Responsible for processing shard responses.
ShardResultTransformer<T,R>	A ShardResultTransformer is responsible for transforming a grouped shard result into group related structures (such as TopGroups and SearchGroup) and visa versa.
ShowFileRequestHandler	This handler uses the RawResponseWriter to give client access to files inside ${solr.home}/conf
ShutdownAwareDirectory	CachingDirectoryFactory will call this method rather than Directory.close() on shutdown if a Directory implements this interface.
Signature
SignatureUpdateProcessorFactory
SignificantTermsQParserPlugin
SimilarityFactory	A factory interface for configuring a Similarity in the Solr schema.xml.
SimpleAggValueSource
SimpleBoundaryScanner
SimpleEndResultTransformer	Implementation of EndResultTransformer that transforms the grouped result into a single flat list.
SimpleFacets	A class that generates simple Facet information for a request.
SimpleFacets.CountPair<K extends Comparable<? super K>,V extends Comparable<? super V>>	A simple key=>val pair whose natural order is such that higher vals come before lower vals.
SimpleFacets.ParsedParams
SimpleFragListBuilder
SimpleFragmentsBuilder
SimpleMergePolicyFactory	A MergePolicyFactory for simple MergePolicy objects.
SimpleMLTQParser
SimplePlacementContextImpl	Implementation of PlacementContext that uses SimpleClusterAbstractionsImpl to create components necessary for the placement plugins to use.
SimplePlacementFactory	Factory for creating SimplePlacementFactory.SimplePlacementPlugin, a placement plugin implementing the logic from the old LegacyAssignStrategy.
SimplePlacementFactory.SimplePlacementPlugin
SimplePostTool	Deprecated. This class is being replaced with bin/solr tool.
SimplePostTool.PageFetcherResult	Utility class to hold the result form a page fetch
SimplePreAnalyzedParser	Simple plain text format parser for PreAnalyzedField.
SimplePropagator
SimpleQParserPlugin	Create a query from the input value that will be parsed by Lucene's SimpleQueryParser.
SimpleTextCodecFactory
SimpleUpdateProcessorFactory	A base class for writing a very simple UpdateProcessor without worrying too much about the API.
SingleCoreStatusAPI	V2 API for checking the status of a specific core.
SingleFragListBuilder
SizeLimitedDistributedMap	A size limited distributed map maintained in zk.
SkipExistingDocumentsProcessorFactory	This Factory generates an UpdateProcessor that will (by default) skip inserting new documents if there already exists a document with the same uniqueKey value in the index.
SliceMutator
SlotAcc	Accumulates statistics separated by a slot number.
SlotAcc.DoubleFuncSlotAcc
SlotAcc.FuncSlotAcc
SlotAcc.IntSlotAcc
SlotAcc.LongFuncSlotAcc
SlotAcc.Resizer
SlotAcc.SlotContext	Incapsulates information about the current slot, for Accumulators that may want additional info during collection.
SlowCompositeReaderWrapper	This class forces a composite reader (eg a MultiReader or DirectoryReader) to emulate a LeafReader.
SmileResponseWriter
SmileResponseWriter.SmileWriter
SnapShooter	Provides functionality equivalent to the snapshooter script This is no longer used in standard replication.
SnapShooter.CoreSnapshotResponse
SnapshotBackupAPI	V2 endpoint for Backup API used for User-Managed clusters and Single-Node Installation.
SnapshotBackupAPI.BackupReplicationRequestBody
SnapshotBackupAPI.BackupReplicationResponse	Response for SnapshotBackupAPI.createBackup(BackupReplicationRequestBody).
SolrAnalyzer
SolrApacheHttpRequestCarrier	An OpenTracing Carrier for injecting Span context through an Apache HttpRequest
SolrAuthenticationException
SolrBoundaryScanner
SolrCache<K,V>	Primary API for dealing with Solr's internal caches.
SolrCache.State	Enumeration of possible States for cache instances.
SolrCacheBase	Common base class of reusable functionality for SolrCaches
SolrCacheBase.AutoWarmCountRef	Decides how many things to autowarm based on the size of another cache
SolrCLI	Command-line utility for working with Solr.
SolrCLI.AssertionFailureException
SolrCmdDistributor	Used for distributing commands from a shard leader to its replicas.
SolrCmdDistributor.ForwardNode
SolrCmdDistributor.Node
SolrCmdDistributor.Req
SolrCmdDistributor.Response
SolrCmdDistributor.SolrError
SolrCmdDistributor.StdNode
SolrCollection	Represents a Collection in SolrCloud (unrelated to Collection that uses the nicer name).
SolrComparisonBoolFunction	Refines ComparisonBoolFunction to compare based on a 'long' or 'double' depending on if the any of the FunctionValues are LongDocValues.
SolrComparisonBoolFunction.Compare
SolrConfig	Provides a static reference to a Config object modeling the main configuration data for a Solr instance -- typically found in "solrconfig.xml".
SolrConfig.HttpCachingConfig
SolrConfig.HttpCachingConfig.LastModFrom
SolrConfig.PluginOpts
SolrConfig.SolrPluginInfo
SolrConfig.UpdateHandlerInfo
SolrConfigHandler
SolrCore	SolrCore got its name because it represents the "core" of Solr -- one index and everything needed to make it work.
SolrCore.Provider	Provides the core instance if the core instance is still alive.
SolrCore.RawWriter
SolrCoreAware
SolrCoreContainerReporter	A SolrMetricReporter that has access to its CoreContainer.
SolrCoreInitializationException
SolrCoreMetricManager	Helper class for managing registration of SolrMetricProducer's and SolrMetricReporter's specific to a SolrCore instance.
SolrCoreParser	Assembles a QueryBuilder which uses Query objects from Solr's search module in addition to Query objects supported by the Lucene CoreParser.
SolrCoreReporter	A FilteringSolrMetricReporter that has access to its SolrCore.
SolrCores	AKA CoreManager: Holds/manages SolrCores within CoreContainer.
SolrCoreState	The state in this class can be easily shared between SolrCores across SolrCore reloads.
SolrCoreState.CoreIsClosedException
SolrCoreState.IndexWriterCloser
SolrDefaultStreamFactory	A default collection of mappings, used to convert strings into stream expressions.
SolrDelegateRegistryMetricsContext	This class represents a metrics context that is delegate aware in that it is aware of multiple metric registries, a primary and a delegate.
SolrDeletionPolicy	Standard Solr deletion policy that allows reserving index commit points for certain amounts of time to support features such as index replication or snapshotting directly out of a live index directory.
SolrDispatchFilter	This filter looks at the incoming URL maps them to handlers defined in solrconfig.xml
SolrDispatchFilter.Action	Enum to define action that needs to be processed.
SolrDispatchFilter.HttpSolrCallFactory	internal API
SolrDocumentFetcher	A helper class of SolrIndexSearcher for stored Document related matters including DocValue substitutions.
SolrEncoder
SolrEnvironment	It is possible to define an environment code when starting Solr, through -Dsolr.environment=prod|stage|test|dev or by setting the cluster property "environment".
SolrEventListener
SolrFieldCacheBean	A SolrInfoBean that provides introspection of the Solr FieldCache
SolrFormatter
SolrFragListBuilder
SolrFragmenter
SolrFragmentsBuilder
SolrGraphiteReporter	Metrics reporter that wraps GraphiteReporter.
SolrHighlighter
SolrIndexConfig	This config object encapsulates IndexWriter config params, defined in the <indexConfig> section of solrconfig.xml
SolrIndexSearcher	SolrIndexSearcher adds schema awareness and caching functionality over IndexSearcher.
SolrIndexSearcher.DocsEnumState
SolrIndexSearcher.LimitExceededFromScorerException	Thrown when CommonParams.TIME_ALLOWED is exceeded.
SolrIndexSearcher.ProcessedFilter	INTERNAL: The response object from SolrIndexSearcher.getProcessedFilter(DocSet, List).
SolrIndexSplitter
SolrIndexSplitter.SplitMethod
SolrIndexWriter	An IndexWriter that is configured via Solr config mechanisms.
SolrInfoBean	Interface for getting various ui friendly strings for use by objects which are 'pluggable' to make server administration easier.
SolrInfoBean.Category	Category of Solr component.
SolrInfoBean.Group	Top-level group of beans or metrics for a subsystem.
SolrInfoMBeanHandler	A request handler that provides info about all registered SolrInfoMBeans.
SolrJacksonAnnotationInspector	this class provides a mapping between Solr's JsonProperty annotation to a corresponding annotation in jackson see SOLR-13841 for more details
SolrJacksonMapper	Customizes the ObjectMapper settings used for serialization/deserialization in Jersey
SolrJacksonMapper.NamedListSerializer
SolrJettyRequestCarrier	An OpenTracing Carrier for injecting Span context through a Jetty Request
SolrJmxReporter	A SolrMetricReporter that finds (or creates) a MBeanServer from the given configuration and registers metrics to it with JMX.
SolrLogAuditLoggerPlugin	Audit logger that writes to the Solr log.
SolrLogPostTool	Deprecated. Please use PostLogsTool that is exposed as 'bin/solr postlogs'.
SolrMetricInfo	Wraps meta-data for a metric.
SolrMetricManager	This class maintains a repository of named MetricRegistry instances, and provides several helper methods for managing various aspects of metrics reporting: registry creation, clearing and removal, creation of most common metric implementations, management of SolrMetricReporter-s specific to a named registry.
SolrMetricManager.AndFilter	An implementation of MetricFilter that selects metrics that match all filters in a list of filters.
SolrMetricManager.GaugeWrapper<T>	This is a wrapper for Gauge metrics, which are usually implemented as lambdas that often keep a reference to their parent instance.
SolrMetricManager.OrFilter	An implementation of MetricFilter that selects metrics that match any filter in a list of filters.
SolrMetricManager.PrefixFilter	An implementation of MetricFilter that selects metrics with names that start with one of prefixes.
SolrMetricManager.RegexFilter	An implementation of MetricFilter that selects metrics with names that match regular expression patterns.
SolrMetricManager.ResolutionStrategy	Potential conflict resolution strategies when attempting to register a new metric that already exists
SolrMetricProducer	Used by objects that expose metrics through SolrMetricManager.
SolrMetricReporter	Interface for 'pluggable' metric reporters.
SolrMetricsContext	This class represents a metrics context that ties together components with the same life-cycle and provides convenient access to the metric registry.
SolrNodeKeyPair	Creates and mediates access to the CryptoKeys.RSAKeyPair used by this Solr node.
SolrPackage	Describes a package (along with all released versions) as it appears in a repository.
SolrPackage.Artifact
SolrPackage.Command
SolrPackage.Manifest
SolrPackage.Plugin
SolrPackage.SolrPackageRelease
SolrPackageInstance	Describes one instance of a package as it exists in Solr when installed.
SolrPackageLoader	The class that holds a mapping of various packages and classloaders
SolrPaths	Utility methods about paths in Solr.
SolrPaths.AllowPathBuilder	Builds a set of allowed Path.
SolrPluginUtils	Utilities that may be of use to RequestHandlers.
SolrPluginUtils.DisjunctionMaxQueryParser	A subclass of SolrQueryParser that supports aliasing fields for constructing DisjunctionMaxQueries.
SolrPluginUtils.DisjunctionMaxQueryParser.Alias	A simple container for storing alias info
SolrQueryBuilder
SolrQueryParser	Solr's default query parser, a schema-driven superset of the classic lucene query parser.
SolrQueryParserBase	This class is overridden by QueryParser in QueryParser.jj and acts to separate the majority of the Java code from the .jj grammar file.
SolrQueryParserBase.MagicFieldName	Identifies the list of all known "magic fields" that trigger special parsing behavior
SolrQueryParserBase.RawQuery
SolrQueryParserBase.SynonymQueryStyle	Query strategy when analyzed query terms overlap the same position (ie synonyms) consider if pants and khakis are query time synonyms
SolrQueryRequest	Container for a request to execute a query.
SolrQueryRequestBase	Base implementation of SolrQueryRequest that provides some convenience methods for accessing parameters, and manages an IndexSearcher reference.
SolrQueryResponse	SolrQueryResponse is used by a query handler to return the response to a query request.
SolrRangeQuery
SolrReporter	Implementation of ScheduledReporter that reports metrics from selected registries and sends them periodically as update requests to a selected Solr collection and to a configured handler.
SolrReporter.Builder	Builder for the SolrReporter class.
SolrReporter.Report	Specification of what registries and what metrics to send.
SolrRequestAuthorizer	A JAX-RS request filter that blocks or allows requests based on the authorization plugin configured in security.json.
SolrRequestHandler	Implementations of SolrRequestHandler are called to handle query requests.
SolrRequestInfo	Information about the Solr request/response held in a ThreadLocal.
SolrRequestParsers
SolrResourceLoader
SolrResourceLoader.SolrFileInputStream
SolrResourceNotFoundException
SolrResponseUtil
SolrReturnFields	The default implementation of return fields parsing for Solr.
SolrReturnFields.FIELD_SOURCES
SolrSlf4jReporter	Metrics reporter that wraps Slf4jReporter.
SolrSnapshotManager	This class provides functionality required to handle the data files corresponding to Solr snapshots.
SolrSnapshotMetaDataManager	This class is responsible to manage the persistent snapshots meta-data for the Solr indexes.
SolrSnapshotMetaDataManager.SnapshotMetaData	A class defining the meta-data for a specific snapshot.
SolrSpanQueryBuilder
SolrSpellChecker	Refer to https://solr.apache.org/guide/solr/latest/query-guide/spell-checking.html for more details.
SolrSuggester	Responsible for loading the lookup and dictionary Implementations specified by the SolrConfig.
SolrXmlConfig	Loads solr.xml.
SolrZkServer
SortableTextField	SortableTextField is a specialized form of TextField that supports Sorting and ValueSource functions, using docValues built from the first maxCharsForDocValues characters of the original (pre-analyzed) String values of this field.
SortedDateStatsValues
SortedIntDocSet	A simple sorted int[] array implementation of DocSet, good for small sets.
SortedNumericStatsValues
SortingMergePolicy
SortingMergePolicyFactory	A MergePolicyFactory for SortingMergePolicy objects.
SortSpec	SortSpec encapsulates a Lucene Sort and a count of the number of documents to return.
SortSpecParsing
SpatialBoxQParserPlugin
SpatialFilterQParser
SpatialFilterQParserPlugin	Creates a spatial Filter based on the type of spatial point used.
SpatialHeatmapFacets	A 2D spatial faceting summary of a rectangular region.
SpatialHeatmapFacets.HeatmapFacet	Goes in FacetComponent.FacetInfo.heatmapFacets, created by SpatialHeatmapFacets.distribParse(org.apache.solr.common.params.SolrParams, ResponseBuilder).
SpatialOptions
SpatialQueryable	Indicate that the implementing class is capable of generating a Query against spatial resources.
SpatialRecursivePrefixTreeFieldType
SpatialUtils	Utility methods pertaining to spatial.
SpellCheckCollation
SpellCheckCollator
SpellCheckComponent	A SearchComponent implementation which provides support for spell checking and suggestions using the Lucene contributed SpellChecker.
SpellCheckCorrection
SpellCheckMergeData
SpellingOptions
SpellingQueryConverter	Converts the query string to a Collection of Lucene tokens using a regular expression.
SpellingResult	Implementations of SolrSpellChecker must return suggestions as SpellResult instance.
SplitCoreAPI	V2 API for splitting a single core into multiple pieces
SplitCoreAPI.SplitCorePayload
SplitIndexCommand	A split index command encapsulated in an object.
SplitShardAPI	V2 API for splitting an existing shard up into multiple pieces.
SplitShardCmd	SolrCloud logic for splitting a shard.
SquaredEuclideanFunction	While not strictly a distance, the Sq.
SSLConfigurations	Dedicated object to handle Solr configurations
SSLConfigurations.SysProps
SSLConfigurationsFactory
SSLCredentialProvider	Interface for different source of SSL configurations.
SSLCredentialProvider.CredentialType
SSLCredentialProviderFactory	Class responsible to build SSL credential providers
StandardDirectoryFactory	Directory provider which mimics original Solr FSDirectory based behavior.
StandardIndexReaderFactory	Default IndexReaderFactory implementation.
StandardRequestHandler	Deprecated.
StartupLoggingUtils	Handles programmatic modification of logging during startup
Stats	Used to hold statistics about some SolrCloud operations.
Stats.FailedOp
Stats.Stat
StatsCache	This class represents a cache of global document frequency information for selected terms.
StatsCache.StatsCacheMetrics
StatsComponent	Stats component calculates simple statistics on numeric field values
StatsField	Models all of the information associated with a single StatsParams.STATS_FIELD instance.
StatsField.HllOptions	Helper Struct for parsing and encapsulating all of the options relaed to building a HLL
StatsField.Stat	An enumeration representing the sumer set of all possible stat values that can be computed.
StatsSource	The purpose of this class is only to provide two pieces of information necessary to create Weight from a Query, that is TermStatistics for a term and CollectionStatistics for the whole collection.
StatsUtil	Various utilities for de/serialization of term stats and collection stats.
StatsValues	StatsValue defines the interface for the collection of statistical values about fields and facets.
StatsValuesFactory	Factory class for creating instance of StatsValues
StatusTool
StddevAgg
StoredFieldsShardRequestFactory
StoredFieldsShardResponseProcessor	Concrete implementation for processing the stored field values from shard responses.
StrAggValueSource
StreamHandler	Solr Request Handler for streaming data.
StreamHandler.DaemonCollectionStream
StreamHandler.DaemonResponseStream
StreamHandler.DummyErrorStream
StreamHandler.ExpressibleHolder
StreamHandler.TimerStream
StreamingSolrClients
StrField
StrFieldSource
StringDistanceFunction
StrParser	Simple class to help with parsing a string.
SubQueryAugmenterFactory	This transformer executes subquery per every result document.
SubstringBytesRefFilter	An implementation of Predicate which returns true if the BytesRef contains a given substring.
SuggestComponent	SuggestComponent: interacts with multiple SolrSuggester to serve up suggestions Responsible for routing commands and queries to the appropriate SolrSuggester and for initializing them as specified by SolrConfig
Suggester
SuggesterOptions	Encapsulates the inputs required to be passed on to the underlying suggester in SolrSuggester
SuggesterParams
SuggesterResult	Encapsulates the results returned by the suggester in SolrSuggester
SuggestQueryConverter	Passes the entire query string to the configured analyzer as-is.
SumAgg
SumAgg.Merger
SumsqAgg
SurroundQParserPlugin	Plugin for lucene Surround query parser, bringing SpanQuery support to Solr.
SwapCores
SweetSpotSimilarityFactory	Factory for SweetSpotSimilarity.
SwitchQParserPlugin	A QParserPlugin that acts like a "switch/case" statement.
SyncShard	V2 API implementation for triggering a shard-sync operation within a particular collection and shard.
SyncStrategy
SyntaxError	Simple checked exception for parsing errors
SysPropSSLCredentialProvider	System property based SSL configuration provider
SystemIdResolver	This is a helper class to support resolving of XIncludes or other hrefs inside XML files on top of a ResourceLoader.
SystemInfoHandler	This handler returns system info
TabularResponseWriter	Base response writer for table-oriented data
TagClusterReducer
Tagger	Tags maximum string of words in a corpus.
TaggerRequestHandler	Scans posted text, looking for matching strings in the Solr index.
TaggingAttribute	Attribute used by the Tagger to decide if a token can start a new tag.
TaggingAttributeImpl	Implementation of the TaggingAttribute
TagLL	This is a Tag -- a startOffset, endOffset and value.
TaskManagementHandler	Abstract class which serves as the root of all task managing handlers
TemplateUpdateProcessorFactory	Adds new fields to documents based on a template pattern specified via Template.field request parameters (multi-valued) or 'field' value specified in initArgs.
TemplateUpdateProcessorFactory.Resolved
TermQParserPlugin	Create a single term query from the input value equivalent to readableToIndexed().
TermsComponent	Return TermEnum information, useful for things like auto suggest.
TermsComponent.TermCountComparator	Comparator for TermsResponse.Term sorting This sorts term by frequency in descending order
TermsComponent.TermsHelper
TermsQParserPlugin	Finds documents whose specified field has any of the specified values.
TermStats	Modifiable version of TermStatistics useful for aggregation of per-shard stats.
TermVectorComponent	Return term vectors for the documents in a query result set.
TestInjection	Allows random faults to be injected in running code during test runs.
TestInjection.Hook
TestInjection.TestShutdownFailError
TextField	TextField is the basic type for configurable text analysis.
TextLogisticRegressionQParserPlugin	Returns an AnalyticsQuery implementation that performs one Gradient Descent iteration of a result set to train a logistic regression model
TextProfileSignature	This implementation is copied from Apache Nutch.
TextResponseWriter	Base class for text-oriented response writers.
ThreadCpuTimer	Allows tracking information about the current thread using the JVM's built-in management bean ThreadMXBean.
ThreadDumpHandler
TieredMergePolicyFactory	A MergePolicyFactory for TieredMergePolicy objects.
TimeAllowedLimit	Enforces a wall clock based timeout on a given SolrQueryRequest.
TimedVersionBucket	This implementation uses lock and condition and will throw exception if it can't obtain the lock within lockTimeoutMs.
TimeOut
TimeRoutedAlias	Holds configuration for a routed alias, and some common code and constants.
TimestampUpdateProcessorFactory	An update processor that adds a newly generated Date value of "NOW" to any document being added that does not already have a value in the specified field.
TimeZoneUtils	Simple utilities for working with TimeZones
Token	Describes the input token stream.
Token	Deprecated.
TokenizerChain	An analyzer that uses a tokenizer and a list of token filters to create a TokenStream.
TokenMgrError	Token Manager Error.
TolerantUpdateProcessor	Suppresses errors for individual add/delete commands within a single request.
TolerantUpdateProcessorFactory	Suppresses errors for individual add/delete commands within a single request.
Tool
ToolBase
TopGroupsFieldCommand	Defines all collectors for retrieving the second phase and how to handle the collector result.
TopGroupsFieldCommand.Builder
TopGroupsResultTransformer	Implementation for transforming TopGroups and TopDocs into a NamedList structure and vice versa.
TopGroupsShardRequestFactory	Concrete implementation of ShardRequestFactory that creates ShardRequest instances for getting the top groups from all shards.
TopGroupsShardResponseProcessor	Concrete implementation for merging TopGroups instances from shard responses.
TopLevelJoinQuery	JoinQuery implementation using global (top-level) DocValues ordinals to efficiently compare values in the "from" and "to" fields.
TopLevelJoinQuery.BitsetBounds
TracerConfigurator	Produces an OpenTracing Tracer from configuration.
TraceUtils	Utilities for distributed tracing.
TransactionLog	Log Format: List{Operation, Version, ...} ADD, VERSION, DOC DELETE, VERSION, ID_BYTES DELETE_BY_QUERY, VERSION, String
TransactionLog.ChannelFastInputStream
TransactionLog.ChannelInputStreamOpener	Opens TransactionLog.ChannelFastInputStream from FileChannel.
TransactionLog.OutputStreamOpener	Opens OutputStream from FileChannel.
TransactionLog.ReverseReader
TransformerFactory	New instance for each request
TransformerFactory.FieldRenamer	The TransformerFactory.FieldRenamer interface should be implemented by any TransformerFactory capable of generating transformers that might rename fields, and should implement TransformerFactory.FieldRenamer.create(String, SolrParams, SolrQueryRequest, Map, Set) in place of TransformerFactory.create(String, SolrParams, SolrQueryRequest) (with the latter method overridden to throw UnsupportedOperationException).
TransientSolrCoreCache	Deprecated.
TransientSolrCoreCacheDefault	Deprecated.
TransientSolrCores	Deprecated.
TrieDateField	Deprecated. Trie fields are deprecated as of Solr 7.0
TrieDoubleField	Deprecated. Trie fields are deprecated as of Solr 7.0
TrieField	Deprecated. Trie fields are deprecated as of Solr 7.0
TrieFloatField	Deprecated. Trie fields are deprecated as of Solr 7.0
TrieIntField	Deprecated. Trie fields are deprecated as of Solr 7.0
TrieLongField	Deprecated. Trie fields are deprecated as of Solr 7.0
TrimFieldUpdateProcessorFactory	Trims leading and trailing whitespace from any CharSequence values found in fields matching the specified conditions and returns the resulting String.
TruncateFieldUpdateProcessorFactory	Truncates any CharSequence values found in fields matching the specified conditions to a maximum character length.
TSTLookupFactory	Factory for TSTLookup
UnifiedSolrHighlighter	Highlighter impl that uses UnifiedHighlighter
UnifiedSolrHighlighter.SolrExtendedUnifiedHighlighter	From UnifiedSolrHighlighter.getHighlighter(org.apache.solr.request.SolrQueryRequest).
UnInvertedField	Final form of the un-inverted field: Each document points to a list of term numbers that are contained in that document.
UnInvertedField.Callback
UnInvertedFieldAcc	Base accumulator for UnInvertedField
UninvertingReader	A FilterReader that exposes indexed values as if they also had docvalues.
UninvertingReader.FieldCacheStats	Return information about the backing cache
UninvertingReader.Type	Specifies the type of uninversion to apply for the field.
UniqFieldsUpdateProcessorFactory	Removes duplicate values found in fields matching the specified conditions.
UniqueAgg
UniqueBlockAgg
UniqueBlockAgg.UniqueBlockSlotAcc
UniqueBlockFieldAgg
UniqueBlockQueryAgg
UnloadCore	V2 API implementation for unloading a Solr core.
UpdateAPI	All v2 APIs that share a prefix of /update
UpdateCommand	An index update command encapsulated in an object (Command pattern)
UpdateHandler	UpdateHandler handles requests to change the index (adds, deletes, commits, optimizes, etc).
UpdateLog	This holds references to the transaction logs.
UpdateLog.DBQ	Holds the query and the version for a DeleteByQuery command
UpdateLog.DeleteUpdate
UpdateLog.LogPtr
UpdateLog.RecoveryInfo
UpdateLog.State
UpdateLog.SyncLevel
UpdateLog.Update
UpdateRequestHandler	UpdateHandler that uses content-type to pick the right Loader
UpdateRequestProcessor	This is a good place for subclassed update handlers to process the document before it is indexed.
UpdateRequestProcessorChain	Manages a chain of UpdateRequestProcessorFactories.
UpdateRequestProcessorChain.LazyUpdateProcessorFactoryHolder
UpdateRequestProcessorChain.LazyUpdateProcessorFactoryHolder.LazyUpdateRequestProcessorFactory
UpdateRequestProcessorChain.ProcessorInfo
UpdateRequestProcessorFactory	A factory to generate an UpdateRequestProcessor for each request.
UpdateRequestProcessorFactory.RunAlways	A marker interface for UpdateRequestProcessorFactory implementations indicating that the factory should be used even if the update.distrib parameter would otherwise cause it to not be run.
UpdateShardHandler
UpdateShardHandlerConfig
UpgradeIndexMergePolicyFactory	A MergePolicyFactory for UpgradeIndexMergePolicy objects.
UploadBlobAPI	V2 API for uploading blobs into Solr's .system blobstore
UploadConfigSetAPI	V2 API for uploading a new configset (or overwriting an existing one).
UploadConfigSetFileAPI	V2 API for adding or updating a single file within a configset.
URLClassifyProcessor	Update processor which examines a URL and outputs to various other fields characteristics of that URL, including length, number of path levels, whether it is a top level URL (levels==0), whether it looks like a landing/index page, a canonical representation of the URL (e.g.
URLClassifyProcessorFactory	Creates URLClassifyProcessor
UUIDField	This FieldType accepts UUID string values, as well as the special value of "NEW" which triggers generation of a new random UUID.
UUIDUpdateProcessorFactory	An update processor that adds a newly generated UUID value to any document being added that does not already have a value in the specified field.
V2ApiUtils	Utilities helpful for common V2 API declaration tasks.
V2HttpCall
V2HttpCall.CompositeApi
V2NodeLoggingAPI	V2 API for getting log levels on an individual node.
V2UpdateRequestHandler	An extension of UpdateRequestHandler used solely to register the v2 /update APIs
ValueAugmenterFactory
ValueAugmenterFactory.ValueAugmenter
ValueSourceAugmenter	Add values from a ValueSource (function query etc)
ValueSourceParser	A factory that parses user queries to generate ValueSource instances.
ValueSourceRangeFilter	RangeFilter over a ValueSource.
VarianceAgg
VectorDistanceFunction	Calculate the p-norm for a Vector.
VectorSimilaritySourceParser	This class provides implementation for two variants for parsing function query vectorSimilarity which is used to calculate the similarity between two vectors.
VerifiedUserRoles	Interface used to pass verified user roles in a Principal object.
VersionBucket	The default implementation which uses the intrinsic object monitor.
VersionBucket.CheckedFunction<T,R>
VersionedFile
VersionInfo
VersionTool
WeightedFragListBuilder
WFSTLookupFactory	Factory for WFSTCompletionLookup
WordBreakSolrSpellChecker	A spellchecker that breaks and combines words.
WordBreakSolrSpellChecker.BreakSuggestionTieBreaker	Specify a value on the "breakSuggestionTieBreaker" parameter.
WrappedQuery	A simple query that wraps another query and implements ExtendedQuery.
WrapperMergePolicyFactory	A MergePolicyFactory for wrapping additional factories.
XmlConfigFile	Wrapper around an XML DOM object to provide convenient accessors to it.
XMLLoader
XmlOffsetCorrector	Corrects offsets to adjust for XML formatted data.
XmlQParserPlugin	The XmlQParserPlugin extends the QParserPlugin and supports the creation of queries from XML.
XMLResponseWriter
XMLWriter
ZkCLI
ZkClusterPluginsSource	The plugin configurations are stored and retrieved from the ZooKeeper cluster properties, stored at the ZkStateReader.CONTAINER_PLUGINS location This supports mutable configurations, and management via the /cluster/plugin APIs
ZkConfigSetService	SolrCloud Zookeeper ConfigSetService impl.
ZkContainer	Used by CoreContainer to hold ZooKeeper / SolrCloud info, especially ZkController.
ZkController	Handle ZooKeeper interactions.
ZkController.NotInClusterStateException	Thrown during pre register process if the replica is not present in clusterstate
ZkController.ResourceModifiedInZkException
ZkCpTool
ZkDistributedCollectionLockFactory	A distributed lock implementation using Zookeeper "directory" nodes created within a collection znode hierarchy, for use with the distributed Collection API implementation.
ZkDistributedConfigSetLockFactory	A distributed lock implementation using Zookeeper "directory" nodes created within a collection znode hierarchy, for use with the distributed Collection API implementation.
ZkDistributedQueue	A ZK-based distributed queue.
ZkIndexSchemaReader	Keeps a ManagedIndexSchema up-to-date when changes are made to the serialized managed schema in ZooKeeper
ZkIndexSchemaReader.SchemaWatcher	Watches for schema changes and triggers updates in the ZkIndexSchemaReader.
ZkLsTool
ZkMkrootTool
ZkMvTool
ZkRmTool
ZkShardTerms	Class used for interact with a ZK term node.
ZkSolrResourceLoader	ResourceLoader that works with ZooKeeper.
ZkSolrResourceLoader.ZkByteArrayInputStream
ZkStateWriter	ZkStateWriter is responsible for writing updates to the cluster state stored in ZooKeeper for collections each of which gets their own individual state.json in ZK.
ZkStateWriter.ZkWriteCallback
ZkWriteCommand
ZookeeperInfoHandler	Zookeeper Info
ZookeeperReadAPI	Exposes the content of the Zookeeper This is an expert feature that exposes the data inside the back end zookeeper.This API may change or be removed in future versions.
ZookeeperReadAPI.AnnotatedStat
ZookeeperReadAPI.ListZkChildrenResponse
ZookeeperReadAPI.ZooKeeperFileResponse
ZookeeperStatusHandler	Zookeeper Status handler, talks to ZK using sockets and four-letter words