## Uses of Class
org.apache.solr.update.UpdateHandler

- Packages that use UpdateHandler
  Package | Description
  --- | ---
  org.apache.solr.core | Core classes implementing Solr internals and the management of `SolrCore`s
  org.apache.solr.update | APIs and classes for managing index updates

- - ### Uses of UpdateHandler in org.apache.solr.core

    Methods in org.apache.solr.core that return UpdateHandler
    Modifier and Type | Method and Description
    --- | ---
    `UpdateHandler` | SolrCore.`getUpdateHandler()` RequestHandlers need access to the updateHandler so they can all talk to the same RAM indexer.

    Constructors in org.apache.solr.core with parameters of type UpdateHandler
    Constructor and Description
    `SolrCore(String name, String dataDir, SolrConfig config, IndexSchema schema, NamedList configSetProperties, CoreDescriptor coreDescriptor, UpdateHandler updateHandler, IndexDeletionPolicyWrapper delPolicy, SolrCore prev)` Creates a new core and register it in the list of cores.

  - ### Uses of UpdateHandler in org.apache.solr.update

    Subclasses of UpdateHandler in org.apache.solr.update
    Modifier and Type | Class and Description
    --- | ---
    `class` | `DirectUpdateHandler2` `DirectUpdateHandler2` implements an UpdateHandler where documents are added directly to the main Lucene index as opposed to adding to a separate smaller index.

    Methods in org.apache.solr.update with parameters of type UpdateHandler
    Modifier and Type | Method and Description
    --- | ---
    `void` | CdcrUpdateLog.`init(UpdateHandler uhandler, SolrCore core)`
    `void` | UpdateLog.`init(UpdateHandler uhandler, SolrCore core)`
    `void` | HdfsUpdateLog.`init(UpdateHandler uhandler, SolrCore core)`

    Constructors in org.apache.solr.update with parameters of type UpdateHandler
    Constructor and Description
    `DirectUpdateHandler2(SolrCore core, UpdateHandler updateHandler)`

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