JHipster5 project with JPA static metamodel on Java 10

Question

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:

installed Oracle´s JDK 10.0.1
switched my pom.xml to <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

score 4 · Accepted Answer · answered May 28 '18 at 13:09

4

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.

answered May 28 '18 at 13:09

djeison

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I think this is going to be a further issue with Java 11 as the java.xml.bind module is removed completely. https://hibernate.atlassian.net/browse/HHH-12991 – codylerum Sep 25 '18 at 02:47

score 1 · Answer 2 · edited Oct 16 '18 at 13:06

I had the same problem. Using Java 10, SpringBoot 2.0.3, Hibernate 5.3.1 .

What worked for me in Gradle, was to add javax.xml.bind to annotationProcessor as well :

annotationProcessor group: 'javax.xml.bind', name: 'jaxb-api', version: '2.3.0'

annotationProcessor group: 'org.hibernate', name: 'hibernate-jpamodelgen', version: '5.3.1.Final'

In this way, hibernate-jpamodelgen won't complain anymore about his missing javax.xml.bind dependency, since it's on the same group as him (annotationProcessor)

JHipster5 project with JPA static metamodel on Java 10

2 Answers2