/*
* $Id$
*
* Copyright (C) 2003-2014 JNode.org
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; If not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jnode.command.system;
import java.io.PrintWriter;
import org.jnode.shell.AbstractCommand;
import org.jnode.util.NumberUtils;
/**
* @author Ewout Prangsma (epr@users.sourceforge.net)
*/
public class MemoryCommand extends AbstractCommand {
private static final String help_super = "Shows current JNode memory usage";
private static final String str_total = "Total memory";
private static final String str_used = "Used memory";
private static final String str_free = "Free memory";
private static final String fmt_info = "%12s: %s%n";
public static void main(String[] args) throws Exception {
new MemoryCommand().execute(args);
}
public MemoryCommand() {
super(help_super);
}
/**
* Execute this command
*/
public void execute() throws Exception {
PrintWriter out = getOutput().getPrintWriter();
final Runtime rt = Runtime.getRuntime();
out.format(fmt_info, str_total, NumberUtils.toBinaryByte(rt.totalMemory()));
out.format(fmt_info, str_used, NumberUtils.toBinaryByte(rt.totalMemory() - rt.freeMemory()));
out.format(fmt_info, str_free, NumberUtils.toBinaryByte(rt.freeMemory()));
}
}