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Ditch these. They are a debugging tool that is rather primitive

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and not necessarily even useful. I have found that using finalizers
seems to change how things get collected, even without doing
any funny tricks. Besides, we can use good modern profilers nowadays.


git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@6010 542714f4-19e9-0310-aa3c-eee0fc999fb1
This commit is contained in:
Ray Greenwell
2010-01-04 23:19:17 +00:00
parent 0a98e25304
commit 9a5a43341f
2 changed files with 0 additions and 164 deletions
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src/java/com/threerings/io/TrackedStreamableObject.java
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//
// $Id$
//
// Narya library - tools for developing networked games
// Copyright (C) 2002-2010 Three Rings Design, Inc., All Rights Reserved
// http://www.threerings.net/code/narya/
//
// 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
package com.threerings.io;
import com.samskivert.util.StringUtil;
import com.threerings.util.TrackedObject;
/**
* A simple serializable object implements the {@link Streamable}
* interface and provides a default {@link Object#toString} implementation which
* outputs all public members.
*/
public class TrackedStreamableObject extends TrackedObject
implements Streamable
{
@Override
public String toString ()
{
StringBuilder buf = new StringBuilder("[");
toString(buf);
return buf.append("]").toString();
}
/**
* Handles the toString-ification of all public members. Derived
* classes can override and include non-public members if desired.
*/
protected void toString (StringBuilder buf)
{
StringUtil.fieldsToString(buf, this);
}
}
src/java/com/threerings/util/TrackedObject.java
-112
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//
// $Id$
//
// Narya library - tools for developing networked games
// Copyright (C) 2002-2010 Three Rings Design, Inc., All Rights Reserved
// http://www.threerings.net/code/narya/
//
// 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
package com.threerings.util;
import java.util.Map;
import com.google.common.collect.Maps;
import com.samskivert.util.Tuple;
import static com.threerings.NaryaLog.log;
/**
* Used to perform rudimentary memory profiling on large, running systems
* where it is impractical to operate a real profiler. Instances of {@link
* TrackedObject} record their existence when constructed and their
* destruction when finalized which, combined with periodic queries of the
* current total object count (by class) logged and graphed (gnuplot is
* your friend), can provide an indication of systems that are improperly
* retaining references.
*/
public class TrackedObject
{
// instance initializer - called whenever an instance is constructed
{
incrementInstanceCount();
}
@Override
protected Object clone ()
throws CloneNotSupportedException
{
Object o = super.clone();
incrementInstanceCount();
return o;
}
/** Records that this object came into existence. */
protected final void incrementInstanceCount ()
{
Class<?> clazz = getClass();
synchronized (_map) {
int[] count = _map.get(clazz);
if (count == null) {
_map.put(clazz, count = new int[1]);
}
count[0]++;
}
}
/** Records that this object was collected. */
@Override
protected void finalize ()
throws Throwable
{
Class<?> clazz = getClass();
synchronized (_map) {
int[] count = _map.get(clazz);
if (count != null) {
count[0]--;
} else {
log.warning("Finalized TrackedObject missing counter!", "class", clazz);
}
}
super.finalize();
}
/**
* Returns a {@link Tuple} containing an array of {@link Class}
* instances and an <code>int[]</code> array that represent the number
* of outstanding instance of all {@link TrackedObject}s in the VM.
*/
public static Tuple<Class<?>[], int[]> getSnapshot ()
{
Class<?>[] classes = null;
int[] counts = null;
synchronized (_map) {
classes = new Class[_map.size()];
counts = new int[_map.size()];
int idx = 0;
for (Map.Entry<Class<?>, int[]> entry : _map.entrySet()) {
classes[idx] = entry.getKey();
counts[idx] = entry.getValue()[0];
idx++;
}
}
return new Tuple<Class<?>[], int[]>(classes, counts);
}
/** Tracks a mapping from {@link Class} object to active count. */
protected static Map<Class<?>, int[]> _map = Maps.newHashMap();
}