# Uses of Package
org.apache.solr.util

- Packages that use org.apache.solr.util
  Package | Description
  --- | ---
  org.apache.solr.core | Core classes implementing Solr internals and the management of `SolrCore`s
  org.apache.solr.handler.component | `SearchComponent` implementations for use in `SearchHandler`
  org.apache.solr.request | APIs and classes for dealing with Solr requests
  org.apache.solr.response | API and implementations of `QueryResponseWriter` for formatting Solr request responses
  org.apache.solr.schema | `IndexSchema` and `FieldType` implementations for powering schema.xml
  org.apache.solr.search | APIs and classes for parsing and processing search requests
  org.apache.solr.security | Commonly used classes for Solr security framework.
  org.apache.solr.update | APIs and classes for managing index updates
  org.apache.solr.util | Common utility classes used throughout Solr

- Classes in org.apache.solr.util used by org.apache.solr.core
  Class and Description
  RefCounted Keep track of a reference count on a resource and close it when the count hits zero.

- Classes in org.apache.solr.util used by org.apache.solr.handler.component
  Class and Description
  RTimer A simple timer.

- Classes in org.apache.solr.util used by org.apache.solr.request
  Class and Description
  RefCounted Keep track of a reference count on a resource and close it when the count hits zero.
  RTimerTree A recursive timer.

- Classes in org.apache.solr.util used by org.apache.solr.response
  Class and Description
  FastWriter Single threaded BufferedWriter Internal Solr use only, subject to change.

- Classes in org.apache.solr.util used by org.apache.solr.schema
  Class and Description
  CommandOperation
  DistanceUnits Used with a spatial field type for all distance measurements.

- Classes in org.apache.solr.util used by org.apache.solr.search
  Class and Description
  SolrPluginUtils.DisjunctionMaxQueryParser A subclass of SolrQueryParser that supports aliasing fields for constructing DisjunctionMaxQueries.

- Classes in org.apache.solr.util used by org.apache.solr.security
  Class and Description
  CommandOperation

- Classes in org.apache.solr.util used by org.apache.solr.update
  Class and Description
  RefCounted Keep track of a reference count on a resource and close it when the count hits zero.

- Classes in org.apache.solr.util used by org.apache.solr.util
  Class and Description
  CommandOperation
  ConcurrentLFUCache.CacheEntry
  ConcurrentLFUCache.EvictionListener
  ConcurrentLFUCache.Stats
  ConcurrentLRUCache.CacheEntry
  ConcurrentLRUCache.EvictionListener
  ConcurrentLRUCache.Stats
  DistanceUnits Used with a spatial field type for all distance measurements.
  FastWriter Single threaded BufferedWriter Internal Solr use only, subject to change.
  FSHDFSUtils.CallerInfo
  PivotListEntry Enum for modeling the elements of a (nested) pivot entry as expressed in a NamedList
  PrimUtils.IntComparator
  RefCounted Keep track of a reference count on a resource and close it when the count hits zero.
  RTimer A simple timer.
  RTimer.TimerImpl
  RTimerTree A recursive timer.
  SimplePostTool A simple utility class for posting raw updates to a Solr server, has a main method so it can be run on the command line.
  SolrCLI.SolrCloudTool Helps build SolrCloud aware tools by initializing a CloudSolrClient instance before running the tool.
  SolrCLI.Tool Defines the interface to a Solr tool that can be run from this command-line app.
  SolrCLI.ToolBase
  SolrPluginUtils.DisjunctionMaxQueryParser.Alias A simple container for storing alias info

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