Depending on a Jigsaw module

[pmm]

We have a JBoss module that depends on a Jigsaw module in the JDK. Right now we have a <system> dependency in module.xml but from looking at the comments in the "sun.jdk" module there is mention of a way to depend on a Jigsaw module but we could not find any documentation. How can this be achieved?

Message was edited by: Philippe Marschall fixed typos

[emeuwese]

To me your question is a bit vague. Jigsaw is the name of the project to create the module system. In your module-info.java you can define which packages, services are accessible to others and which modules are required. Code from sun packages should not be used directly. Internal code could be removed or be inaccessible in future releases of the JDK. May be you could tell a little bit more about which module your code depends on?

If you intent to use something like sun.misc.Unsafe then your module-info.java could look like

module com.company.example { 
     requires jdk.unsupported;
}

then your class can import sun.misc.Unsafe; and do something like

Unsafe.class.getDeclaredField("unsafe");

JDK Module Summary

Or is your idea to do something like this Dealing with Sun JDK related NoClassDefFoundError under Jboss | Planet JBoss Developer

[jaikiran]

I think what Philippe wants is to refer/add a dependency in JBoss module.xml to a Java module instead of a JBoss module.

> How can this be achieved?

You can just add a dependency by the same name as that of the Java module. There are other JBoss modules within WildFly which do that. For example here wildfly-core/module.xml at master · wildfly/wildfly-core · GitHub

[pmm]

emeuwese  wrote:

To me your question is a bit vague. Jigsaw is the name of the project to create the module system. In your module-info.java you can define which packages, services are accessible to others and which modules are required. Code from sun packages should not be used directly. Internal code could be removed or be inaccessible in future releases of the JDK. May be you could tell a little bit more about which module your code depends on?

jdk.jfr

[pmm]

jaikiran  wrote:

I think what Philippe wants is to refer/add a dependency in JBoss module.xml to a Java module instead of a JBoss module.

> How can this be achieved?

You can just add a dependency by the same name as that of the Java module. There are other JBoss modules within WildFly which do that. For example here wildfly-core/module.xml at master · wildfly/wildfly-core · GitHub

That does what we need, thanks.