Entities not found for JPA Configuration in Kotlin Service

[lacerdanycolas]

Hi,

I configured a microservice with micronaut-data-hibernate-jpa and when start the container locally it shows the following error: "Entities not found for JPA Configuration: default with package 'my.app.package'. Also tested add @Introspected annotation in my App.kt with the same package present in application.yml and doesnt work too

Entity.kt

import my.app.package

@Entity
@Table(name = "my_table")
class EntityTest()

Application.yml

datasources:
   default:
     url: {my.url.db}
     username: {my.username.db}
     password:: {my.password.db}
     dialect: POSTGRES
     db-type: postgres
     driver-class-name: org.postgresql.Driver
jpa
   default
      packages-to-scan:
          - 'my.app.package' 

Pom.xml

...
<dependency>
    <groupId>io.micronaut.data</groupId>
    <artifactId>micronaut-data-hibernate-jpa</artifactId>
    <version>3.9.6</version>
</dependency>
<dependency>
    <groupId>io.micronaut.sql</groupId>
    <artifactId>micronaut-jdbc-hikari</artifactId>
    <version>4.7.2</version>
    <scope>test</scope>
</dependency>
<dependency>
    <groupId>org.postgresql</groupId>
    <artifactId>postgresql</artifactId>
    <version>42.4.3</version>
</dependency>
...

How can I fix this problem? Thanks for suport

[dstepanov]

Do you have the annotation processor setup properly? It’s better to start with the fuide and then modify the project.

[dstepanov]

Try to take a look at the pom in https://guides.micronaut.io/latest/micronaut-jpa-hibernate-gradle-java.html

[lacerdanycolas]

Hi @dstepanov

After generate sources and update foldes from project, add jakarta.persistence-api version 3.0.0 dependency, and add annotation processor from micronaut-data-processor in kotlin-maven-plugin the service compile and start. But when calling the class Repository,
appear this error Error loading bean [io.micronaut.data.hibernate.operations.HibernateJpaOperations]: javax/persistence/EntityManager

Any Sugestion?

@Repository
interface IRepository : CrudRepository <MyEntity, Int>{
}

@Singleton
open class RepositoryService {

    @Inject
    private lateinit var repository: IRepository

    fun test(): Entity {
        var entity = repository.findById(1) // Here throws Exception
        ...
    }

[dstepanov]

What exactly is the exeption? Micronaut data 3.x supports only Hibernate 5.x, which is using Javax Persistence 2.x

[lacerdanycolas]

@dstepanov The exception is Error loading bean [io.micronaut.data.hibernate.operations.HibernateJpaOperations]: javax/persistence/EntityManage, apparently failed to instantiate the EntityManager with jakarta 3.x.x

And if delete jakarta dependency (3.x.x) from my Pom.xml, get lib jakarta from parent micronaut data (2.x.x), and run mvn clean compile appear this exception: Caused by: java.lang.ClassNotFoundException: jakarta.persistence.criteria.Expression

Any sugestion what I can do?

[dstepanov]

You might want to also add the latest javax.persistence dependency