Reflection Over Internals

↗️ This README only covers one section of the demo. The master branch contains more information.

Reflection Over Internals

Main uses reflection to create an instance of DisconnectedServiceObserver:

private static Object createDisconnected() throws Exception {
	Constructor<?> constructor = Class
		.forName("monitor.observer.DisconnectedServiceObserver")
		.getDeclaredConstructor();
	constructor.setAccessible(true);
	return constructor.newInstance();
}

The thing is, while DisconnectedServiceObserver is in an exported package it is not public and hence inaccessible. Accordingly, this results in an exception at run time:

Exception in thread "main" java.lang.reflect.InaccessibleObjectException:
Unable to make monitor.observer.DisconnectedServiceObserver() accessible:
module monitor.observer does not "opens monitor.observer" to module monitor
    at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:337)
    at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:281)
    at java.base/java.lang.reflect.Constructor.checkCanSetAccessible(Constructor.java:192)
    at java.base/java.lang.reflect.Constructor.setAccessible(Constructor.java:185)
    at monitor/monitor.Main.createDisconnected(Main.java:50)
    at monitor/monitor.Main.main(Main.java:25)

Name		Name	Last commit message	Last commit date
Latest commit History 31 Commits
libs		libs
monitor.observer.alpha		monitor.observer.alpha
monitor.observer.beta		monitor.observer.beta
monitor.observer		monitor.observer
monitor.persistence		monitor.persistence
monitor.rest		monitor.rest
monitor.statistics		monitor.statistics
monitor		monitor
.gitignore		.gitignore
LICENSE		LICENSE
README.md		README.md
compile.bat		compile.bat
compile.sh		compile.sh
dry-run.bat		dry-run.bat
dry-run.sh		dry-run.sh
multi-compile.bat		multi-compile.bat
multi-compile.sh		multi-compile.sh
pom.xml		pom.xml
run.bat		run.bat
run.sh		run.sh

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