Java 9 compatibility

[gioborelli]

Hi, looks like openpojo 0.8.10 has some compatibility issues with java 9:

java.lang.IllegalAccessError: class com.openpojo.random.generator.security.CredentialsRandomGenerator (in unnamed module @0x4275e80d) cannot access class sun.security.krb5.Credentials (in module java.security.jgss) because module java.security.jgss does not export sun.security.krb5 to unnamed module @0x4275e80d
        at com.openpojo.random.generator.security.CredentialsRandomGenerator.<clinit>(CredentialsRandomGenerator.java:39)
        at com.openpojo.registry.ServiceRegistrar.initializeRandomGeneratorService(ServiceRegistrar.java:94)
        at com.openpojo.registry.ServiceRegistrar.<init>(ServiceRegistrar.java:57)
        at com.openpojo.registry.ServiceRegistrar.<init>(ServiceRegistrar.java:49)
        at com.openpojo.registry.ServiceRegistrar$Instance.<clinit>(ServiceRegistrar.java:199)
        at com.openpojo.registry.ServiceRegistrar.getInstance(ServiceRegistrar.java:170)
        at com.openpojo.reflection.impl.PojoClassFactory.getPojoClass(PojoClassFactory.java:42)
        at ...

this was the test code:

   @Test
    public void validateSettersAndGetters() {
        PojoClass userPojo = PojoClassFactory.getPojoClass(User.class);

        Validator pojoValidator = ValidatorBuilder.create()

        // Lets validate that setters and getters are behaving as expected
        .with(new SetterTester())
        .with(new GetterTester())

        .build();

        // Start the Test
        pojoValidator.validate(userPojo);
    } 

[cervenf]

hello, I have a similar issue with java 17 now. Did you please solve it? thank you.

[gioborelli]

I can't even recall what this was about 😅

Sorry

Il ven 11 feb 2022, 10:40 cervenf @.***> ha scritto:

hello, I have a similar issue with java 17 now. Did you please solve it? thank you.

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[lostiniceland]

The problem is the use of reflection for JPMS modules residing within the JDK like in our case java.base/java.time. Since Java 9 this produced warnings along the lines "Illegal Reflective Access..." but with Java 17 this grace period has ended and you have to tell the JVM if additional packages need to be "opened".

So for instance when using Maven surefire, you can use this approach

<argLine>
    --add-opens java.base/java.time=ALL-UNNAMED
</argLine>

[Martinedo]

The issue can be resolved by using the maven-surefire-plugin which is compatible with Java 17 and adding --add-opens arguments.

<plugin>
    <groupId>org.apache.maven.plugins</groupId>
    <artifactId>maven-surefire-plugin</artifactId>
    <version>3.0.0-M5</version>
    <configuration>
        <argLine>
            --add-opens java.security.jgss/sun.security.krb5=ALL-UNNAMED
            --add-opens java.security.jgss/sun.security.krb5.internal=ALL-UNNAMED
            --add-opens java.base/java.time=ALL-UNNAMED
        </argLine>
    </configuration>
</plugin>