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janhoy pushed a commit to branch branch_9_7
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The following commit(s) were added to refs/heads/branch_9_7 by this push:
new 114c16360d9 SOLR-17583: Bring back documentation for Adding Custom
Expressions (#2903) (#2905)
114c16360d9 is described below
commit 114c16360d985c1b474237d9e3fb88c9c78cc31b
Author: cfeldmann <cfeldm...@users.noreply.github.com>
AuthorDate: Thu Dec 12 03:37:55 2024 -0500
SOLR-17583: Bring back documentation for Adding Custom Expressions (#2903)
(#2905)
The section for adding Custom Expressions was removed in Solr 8.8. This
change brings it back.
Co-authored-by: Christine Feldmann <cfeldm...@proofpoint.com>
---
.../modules/query-guide/pages/streaming-expressions.adoc | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git
a/solr/solr-ref-guide/modules/query-guide/pages/streaming-expressions.adoc
b/solr/solr-ref-guide/modules/query-guide/pages/streaming-expressions.adoc
index a9a6bf564aa..bb4c0556cf8 100644
--- a/solr/solr-ref-guide/modules/query-guide/pages/streaming-expressions.adoc
+++ b/solr/solr-ref-guide/modules/query-guide/pages/streaming-expressions.adoc
@@ -100,6 +100,15 @@ In your JSON client you'll need to iterate each doc
(tuple) and check for the EO
Timeouts for Streaming Expressions can be configured with the `socketTimeout`
and `connTimeout` startup parameters.
+=== Adding Custom Expressions
+
+Creating your own custom expressions can be easily done by implementing the
{solr-javadocs}/solrj-streaming/org/apache/solr/client/solrj/io/stream/expr/Expressible.html[Expressible]
interface. To add a custom expression to the
+list of known mappings for the `/stream` and `/graph` handlers, you just need
to declare it as a plugin in `solrconfig.xml` via:
+
+[source,xml]
+<expressible name="custom" class="org.example.CustomStreamingExpression"/>
+
+
== Elements of the Language
=== Stream Sources
