package launchserver.command.basic;

import launcher.helper.JVMHelper;
import launcher.helper.LogHelper;
import launchserver.LaunchServer;
import launchserver.command.Command;

public final class GCCommand extends Command {
	public GCCommand(LaunchServer server) {
		super(server);
	}

	@Override
	public String getArgsDescription() {
		return null;
	}

	@Override
	public String getUsageDescription() {
		return "Perform Garbage Collection and print memory usage";
	}

	@Override
	public void invoke(String... args) throws Exception {
		LogHelper.subInfo("Performing full GC");
		JVMHelper.fullGC();

		// Print memory usage
		long max = JVMHelper.RUNTIME.maxMemory() >> 20;
		long free = JVMHelper.RUNTIME.freeMemory() >> 20;
		long total = JVMHelper.RUNTIME.totalMemory() >> 20;
		long used = total - free;
		LogHelper.subInfo("Heap usage: %d / %d / %d MiB", used, total, max);
	}
}