From 114c16360d985c1b474237d9e3fb88c9c78cc31b Mon Sep 17 00:00:00 2001 From: cfeldmann Date: Thu, 12 Dec 2024 03:37:55 -0500 Subject: [PATCH] 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 --- .../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] + + + == Elements of the Language === Stream Sources