Can Hibernate Auto-Detect @Entity Classes to Replace `` Elements in `persistence.xml`?

Do Elements Enhance Persistence?

Question:

In a persistence.xml file, the omission of elements prevents entity recognition. Is there an automated mechanism for detecting @Entity classes?

Answer:

While elements explicitly declare managed persistence classes, an alternative approach is to utilize the jar-file element. It specifies JAR files containing such classes. In the absence of the jar-file element, developers can also rely on Hibernate's auto-detection feature.

Hibernate's Auto-Detection:

To enable Hibernate's auto-detection in Java SE, add the hibernate.archive.autodetection property to the persistence.xml file, as seen below:

<persistence-unit name="eventractor" transaction-type="RESOURCE_LOCAL">
  <!-- Hibernate supports auto-detection in JSE -->
  <properties>
    <property name="hibernate.archive.autodetection" value="class, hbm"/>
    <!-- Other properties -->
  </properties>
</persistence-unit>

By specifying "class, hbm" as the value, the auto-detection process searches for both annotated classes and Hibernate mapping XML files. This provides a convenient alternative to explicitly listing elements, simplifying persistence configuration.

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