/*
* $Id$
*
* 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.BufferedWriter;
import java.io.PrintWriter;
import org.jnode.shell.AbstractCommand;
import org.jnode.shell.syntax.Argument;
import org.jnode.shell.syntax.IntegerArgument;
import org.jnode.shell.syntax.LongArgument;
import org.jnode.shell.syntax.StringArgument;
import org.jnode.vm.facade.HeapStatistics;
import org.jnode.vm.facade.ObjectFilter;
import org.jnode.vm.facade.SimpleObjectFilter;
import org.jnode.vm.facade.VmUtils;
/**
* @author Martin Husted Hartvig (hagar@jnode.org)
*/
public class OnHeapCommand extends AbstractCommand {
private static final String HELP_INST = "the minimum instance count to show";
private static final String HELP_SIZE = "the minimum total size to show";
private static final String HELP_CLASSNAME = "the classname filter";
private static final String HELP_SUPER = "Show the number of instances on the heap with memory usage";
private static final String STR_ON_HEAP = "On Heap:";
private final IntegerArgument argMinInstanceCount;
private final LongArgument argMinTotalSize;
private final StringArgument className;
public OnHeapCommand() {
super(HELP_SUPER);
argMinInstanceCount = new IntegerArgument("minCount", Argument.OPTIONAL, 1, Integer.MAX_VALUE, HELP_INST);
argMinTotalSize = new LongArgument("minTotalSize", Argument.OPTIONAL, 1L, Long.MAX_VALUE, HELP_SIZE);
className = new StringArgument("className", Argument.OPTIONAL | Argument.MULTIPLE, HELP_CLASSNAME);
registerArguments(argMinInstanceCount, argMinTotalSize, className);
}
public static void main(String[] args) throws Exception {
new OnHeapCommand().execute(args);
}
/**
* Execute this command
*/
@Override
public void execute() throws Exception {
PrintWriter out = getOutput().getPrintWriter();
out.println(STR_ON_HEAP);
ObjectFilter filter = null;
if (className.isSet()) {
SimpleObjectFilter f = new SimpleObjectFilter();
f.setClassName(className.getValues());
filter = f;
}
final HeapStatistics stats = VmUtils.getVm().getHeapManager().getHeapStatistics(filter);
if (argMinInstanceCount.isSet()) {
stats.setMinimumInstanceCount(argMinInstanceCount.getValue());
}
if (argMinTotalSize.isSet()) {
stats.setMinimumTotalSize(argMinTotalSize.getValue());
}
BufferedWriter writer = new BufferedWriter(getOutput().getWriter(), 2048);
try {
stats.writeTo(writer);
} finally {
writer.flush();
}
}
}