documentation/src/content/openjpa-knight.adoc

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= Arthur OpenJPA Knights

Arthur OpenJPA knight is responsible to enable OpenJPA support for Graal native-image.

== Coordinates

[source,xml]
----
<dependency>
  <groupId>org.apache.geronimo.arthur.knights</groupId>
  <artifactId>openjpa-knight</artifactId>
  <version>${arthur.version}</version>
</dependency>
----

== Usage

The `openjpa-knight` handles resources, resource bundles and reflection setup for HSQLDB.


You must register the hsqldb knight in `arthur-maven-plugin`:


[source,xml]
----
<plugin>
  <groupId>org.apache.geronimo.arthur</groupId>
  <artifactId>arthur-maven-plugin</artifactId>
  <version>${arthur.version}</version>
  <configuration>
    <main>org.company.Main</main>
    <graalExtensions>
      <graalExtension>openjpa</graalExtension>
    </graalExtensions>
  </configuration>
</plugin>
----

If you need an embedded database you can use link:hsqldb-knight.html[HSQLDB] which is supported as well in native mode.

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