/*-------------------------------------------------------------------------
svninfo: $Id: MudException.java 987 2005-10-20 19:26:50Z maartenl $
Maarten's Mud, WWW-based MUD using MYSQL
Copyright (C) 1998 Maarten van Leunen
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
Maarten van Leunen
Appelhof 27
5345 KA Oss
Nederland
Europe
maarten_l@yahoo.com
-------------------------------------------------------------------------*/
package mmud;
/**
* The class that can be used to provide
* information regarding memory use of the
* java virtual machine.
*/
public class MemoryManager
{
/**
* The memory manager that can be used to get a good
* grip on how much memory we have left, etc.
*/
public static final MemoryManager MEMORY_MANAGER = new MemoryManager();
private Runtime itsRuntime;
/**
* constructor for creating the MemoryManager.
* Only one memory manager is allowed to exist
* during the lifetime of the program.
*/
private MemoryManager()
{
itsRuntime = Runtime.getRuntime();
}
/**
* toString returns a html-formatted string with the
* current memory status.
*/
public String toString()
{
StringBuffer myBuffer = new StringBuffer();
long used = itsRuntime.totalMemory() - itsRuntime.freeMemory();
myBuffer.append("Memory Management<HR>\nAvailable Processors: ");
myBuffer.append(itsRuntime.availableProcessors() + "");
myBuffer.append("<BR>\nused Memory: ");
myBuffer.append(used + " (");
myBuffer.append((used * 100 / itsRuntime.totalMemory()) + "%)");
myBuffer.append("<BR>\nfree Memory: ");
myBuffer.append(itsRuntime.freeMemory() + "");
myBuffer.append("<BR>\ntotal Memory: ");
myBuffer.append(itsRuntime.totalMemory() + "");
myBuffer.append("<BR>\nmax Memory: ");
myBuffer.append(itsRuntime.maxMemory() + "<P>");
return myBuffer.toString();
}
}