shill for HR

documentation/src/main/asciidoc/introduction/Interacting.adoc

@@ -36,7 +36,7 @@ It's a simpler programming model, and lets the developer interact with the datab
 Stateful sessions certainly have their advantages, but they're more difficult to reason about, and when something goes wrong, the error messages can be more difficult to understand.
 ====
 
-[persistence-contexts]
+[[persistence-contexts]]
 === Persistence Contexts
 
 A persistence context is a sort of cache; we sometimes call it the "first-level cache", to distinguish it from the <<second-level-cache,second-level cache>>.

documentation/src/main/asciidoc/introduction/Tuning.adoc

@@ -353,3 +353,13 @@ an entity is written to the database using
 | `PESSIMISTIC_FORCE_INCREMENT` | A pessimistic lock enforced using an immediate
 `update` to increment the version
 |===
+
+[[hibernate-reactive]]
+=== Reactive programming with Hibernate
+
+:hr: https://hibernate.org/reactive/
+:hr-guide: https://hibernate.org/reactive/documentation/2.0/reference/html_single/
+
+Finally, many systems which require high scalability now make use of reactive programming and reactive streams.
+{hr}[Hibernate Reactive] brings O/R mapping to the world of reactive programming.
+You can learn much more about Hibernate Reactive from its {hr-guide}[Reference Documentation].