129 lines
4.2 KiB
Java
129 lines
4.2 KiB
Java
/*
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* Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* The Original Code is HAT. The Initial Developer of the
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* Original Code is Bill Foote, with contributions from others
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* at JavaSoft/Sun.
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*/
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package com.sun.tools.hat.internal.server;
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import com.sun.tools.hat.internal.model.*;
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import java.util.*;
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public class FinalizerSummaryQuery extends QueryHandler {
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public void run() {
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Enumeration objs = snapshot.getFinalizerObjects();
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startHtml("Finalizer Summary");
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out.println("<p align='center'>");
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out.println("<b><a href='/'>All Classes (excluding platform)</a></b>");
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out.println("</p>");
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printFinalizerSummary(objs);
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endHtml();
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}
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private static class HistogramElement {
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public HistogramElement(JavaClass clazz) {
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this.clazz = clazz;
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}
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public void updateCount() {
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this.count++;
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}
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public int compare(HistogramElement other) {
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long diff = other.count - count;
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return (diff == 0L)? 0 : ((diff > 0L)? +1 : -1);
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}
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public JavaClass getClazz() {
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return clazz;
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}
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public long getCount() {
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return count;
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}
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private JavaClass clazz;
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private long count;
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}
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private void printFinalizerSummary(Enumeration objs) {
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int count = 0;
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Map<JavaClass, HistogramElement> map = new HashMap<JavaClass, HistogramElement>();
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while (objs.hasMoreElements()) {
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JavaHeapObject obj = (JavaHeapObject) objs.nextElement();
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count++;
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JavaClass clazz = obj.getClazz();
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if (! map.containsKey(clazz)) {
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map.put(clazz, new HistogramElement(clazz));
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}
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HistogramElement element = map.get(clazz);
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element.updateCount();
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}
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out.println("<p align='center'>");
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out.println("<b>");
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out.println("Total ");
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if (count != 0) {
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out.print("<a href='/finalizerObjects/'>instances</a>");
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} else {
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out.print("instances");
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}
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out.println(" pending finalization: ");
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out.print(count);
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out.println("</b></p><hr>");
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if (count == 0) {
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return;
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}
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// calculate and print histogram
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HistogramElement[] elements = new HistogramElement[map.size()];
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map.values().toArray(elements);
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Arrays.sort(elements, new Comparator<HistogramElement>() {
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public int compare(HistogramElement o1, HistogramElement o2) {
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return o1.compare(o2);
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}
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});
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out.println("<table border=1 align=center>");
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out.println("<tr><th>Count</th><th>Class</th></tr>");
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for (int j = 0; j < elements.length; j++) {
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out.println("<tr><td>");
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out.println(elements[j].getCount());
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out.println("</td><td>");
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printClass(elements[j].getClazz());
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out.println("</td><tr>");
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}
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out.println("</table>");
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}
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}
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