Apache Solr Reference Guide Covering Apache Solr 6.0

client requests facets, the facets defined with a configuration like this are the only facets they will see.
The final section of a request handler definition is components, which defines a list of search components that
can be used with a request handler. They are only registered with the request handler. How to define a search
component is discussed further on in the section on Search Components. The components element can only be
used with a request handler that is a SearchHandler.
The solrconfig.xml file includes many other examples of SearchHandlers that can be used or modified as
needed.
UpdateRequestHandlers
The UpdateRequestHandlers are request handlers which process updates to the index.
In this guide, we've covered these handlers in detail in the section Uploading Data with Index Handlers.
ShardHandlers
It is possible to configure a request handler to search across shards of a cluster, used with distributed search.
More information about distributed search and how to configure the shardHandler is in the section Distributed
Search with Index Sharding.
Other Request Handlers
There are other request handlers defined in
RealTime Get
Index Replication
Ping
solrconfig.xml, covered in other sections of this guide:
Search Components
Search components define the logic that is used by the SearchHandler to perform queries for users.
Default Components
There are several default search components that work with all SearchHandlers without any additional
configuration. If no components are defined (with the exception of first-components and last-component
s - see below), these are executed by default, in the following order:
Component
Name
Class Name
More Information
query solr.QueryComponent Described in the section Query Syntax and Parsing.
facet solr.FacetComponent Described in the section Faceting.
mlt solr.MoreLikeThisComponent Described in the section MoreLikeThis.
highlight solr.HighlightComponent Described in the section Highlighting.
stats solr.StatsComponent Described in the section The Stats Component.
debug solr.DebugComponent Described in the section on Common Query Parameters
.
expand solr.ExpandComponent Described in the section Collapse and Expand Results.
If you register a new search component with one of these default names, the newly defined component will be
Apache Solr Reference Guide 6.0
446