I have been trying to upgrade my JHipster 5 application to use Java 10 but I can't get it to compile and process JPA static metamodels with Maven.
Apparently maven-compiler-plugin is not triggering hibernate-jpamodelgen in order to generate the JPA static metamodels.
In order to upgrade the project I have:
<java.version>10</java.version> upgraded maven-compiler-plugin to add java.xml.bind module (since it is not included by default as of Java 10) as follows:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven-compiler-plugin.version}</version>
<configuration>
<!-- fork is needed so compiler args can be used -->
<fork>true</fork>
<compilerArgs>
<arg>-J--add-modules</arg>
<arg>-Jjava.xml.bind</arg>
</compilerArgs>
<annotationProcessorPaths>
<path>
<groupId>org.mapstruct</groupId>
<artifactId>mapstruct-processor</artifactId>
<version>${mapstruct.version}</version>
</path>
<!-- For JPA static metamodel generation -->
<path>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-jpamodelgen</artifactId>
<version>${hibernate.version}</version>
</path>
</annotationProcessorPaths>
</configuration>
</plugin>
With this I am getting compilation failure when I run ./mvnw clean compile with no further detailed error message.
If I remove the <compilerArgs> tag from pom.xml and run the same command I get: java.lang.NoClassDefFoundError: javax/xml/bind/JAXBException
I have followed the upgrade instructions provided here
Also, I made this example project available on GitHub
This is the commit changes where I upgraded to Java 10
In order to register the solution here wishing to help others, here is what solved this issue:
It turns out it was some Java 9 compatibility problem with hibernate-jpamodelgen@5.2.16.Final. Once I upgraded to Hibernate version 5.3.1.Final it started to compile again.
I also had to solve JAXB dependencies following this answer.