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https://issues.apache.org/jira/browse/SOLR-14382?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17074774#comment-17074774
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Christine Poerschke commented on SOLR-14382:
--------------------------------------------
Looking beyond the QueryComponent and custom multiplexing, I wonder if there
might be a wider use case for a configurable delegating search component i.e.
an out-of-the-box search component that would also support multiplexing e.g.
for the debug, faceting or highlighting components?
{code}
<searchComponent name="queryFoo" class="com.company.team.FooQueryComponent"/>
<searchComponent name="queryBar" class="com.company.team.BarQueryComponent"/>
<searchComponent name="query"
class="org.apache.solr.handler.component.DelegatingSearchComponent">
<lst name="mappings">
<str name="foo">queryFoo</str>
<str name="bar">queryBar</str>
</lst>
</searchComponent>
{code}
Via solrconfig.xml configuration like the above the default query component is
replaced and a {{&foo=true}} parameter would result in use of the
{{FooQueryComponent}} whereas use of {{&bar=true}} would result in use of the
{{BarQueryComponent}} component.
If neither {{&foo=true}} nor {{&bar=true}} are present the search will fail,
perhaps defaulting could be helpful in some scenarios e.g.
{code}
<searchComponent name="debugDefault"
class="org.apache.solr.handler.component.DebugComponent"/>
<searchComponent name="debugCustom" class="com.company.team.DebugComponent"/>
<searchComponent name="debug"
class="org.apache.solr.handler.component.DelegatingSearchComponent">
<str name="mappings.default">debugDefault</str>
<lst name="mappings">
<str name="debug.custom">debugCustom</str>
</lst>
</searchComponent>
{code}
with a {{&debug.custom=true}} parameter resulting in use of a custom debug
component and with {{&debug.custom=false}} or the absence of the
{{&debug.custom}} parameter defaulting to use of the out-of-the-box
DebugComponent.
> delegating search component
> ---------------------------
>
> Key: SOLR-14382
> URL: https://issues.apache.org/jira/browse/SOLR-14382
> Project: Solr
> Issue Type: New Feature
> Reporter: Christine Poerschke
> Assignee: Christine Poerschke
> Priority: Minor
>
> (details to follow)
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