Exporting all modules to all modules at runtime on Java 9 and later
From Java 9 is not allowed by default an application to see all classes from the JDK, unlike all previous versions of Java, due to the new module system. So if we try to access some reserved module we obtain an error like this:module <module-name> does not "opens <package-name>" to unnamed module.
Everyone knows that we can solve this exception by using the JVM parameters --add-exports or add-opens, but how we can do for example if we have more environments and we don't want to have to change JVM args across these environments?
In this situation Burningwave Core comes to our aid by providing us with the method org.burningwave.core.assembler.StaticComponentContainer.Modules.exportAllToAll() that allows us to export all modules in all modules, thus solving our problem. This method is called by default on the initialization of the class org.burningwave.core.assembler.StaticComponentContainer but this behavior can be changed by including in the base folder of your class path a file named burningwave.static.properties that contains a property named modules.export-all-to-all whose value is false thus leaving us the possibility to call this method manually:
The Modules component also exposes other methods for greater granularity:
export(String moduleNameFrom, String moduleNameTo)exportPackage(String moduleNameFrom, String moduleNameTo, String... packageNames)exportPackageToAll(String name, String... packageNames)exportPackageToAllUnnamed(String name, String... packageNames)exportToAll(String name)exportToAllUnnamed(String name)
Therefore, referring to the example above, if we want to limit the export to the package of our interest we have just to replace the call exportAllToAll() with exportPackageToAllUnnamed("java.base", "java.net").
From here you can download/clone the tutorial shared on GitHub that contains another example about to use the method org.burningwave.core.assembler.StaticComponentContainer.Modules.exportAllToAll().
