1 /*

     2  * Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 

    27 /*

    28  * The Original Code is HAT. The Initial Developer of the

    29  * Original Code is Bill Foote, with contributions from others

    30  * at JavaSoft/Sun.

    31  */

    32 

    33 package com.sun.tools.hat.internal.server;

    34 

    35 import com.sun.tools.hat.internal.model.JavaClass;

    36 import java.util.Arrays;

    37 import java.util.Comparator;

    38 

    39 /**

    40  * Prints histogram sortable by class name, count and size.

    41  *

    42  */

    43 public class HistogramQuery extends QueryHandler {

    44     public void run() {

    45         JavaClass[] classes = snapshot.getClassesArray();

    46         Comparator<JavaClass> comparator;

    47         if (query.equals("count")) {

    48             comparator = new Comparator<JavaClass>() {

    49                 public int compare(JavaClass first, JavaClass second) {

    50                     long diff = (second.getInstancesCount(false) -

    51                              first.getInstancesCount(false));

    52                     return (diff == 0)? 0: ((diff < 0)? -1 : + 1);

    53                 }

    54             };

    55         } else if (query.equals("class")) {

    56             comparator = new Comparator<JavaClass>() {

    57                 public int compare(JavaClass first, JavaClass second) {

    58                     return first.getName().compareTo(second.getName());

    59                 }

    60             };

    61         } else {

    62             // default sort is by total size

    63             comparator = new Comparator<JavaClass>() {

    64                 public int compare(JavaClass first, JavaClass second) {

    65                     long diff = (second.getTotalInstanceSize() -

    66                              first.getTotalInstanceSize());

    67                     return (diff == 0)? 0: ((diff < 0)? -1 : + 1);

    68                 }

    69             };

    70         }

    71         Arrays.sort(classes, comparator);

    72 

    73         startHtml("Heap Histogram");

    74 

    75         out.println("<p align='center'>");

    76         out.println("<b><a href='/'>All Classes (excluding platform)</a></b>");

    77         out.println("</p>");

    78 

    79         out.println("<table align=center border=1>");

    80         out.println("<tr><th><a href='/histo/class'>Class</a></th>");

    81         out.println("<th><a href='/histo/count'>Instance Count</a></th>");

    82         out.println("<th><a href='/histo/size'>Total Size</a></th></tr>");

    83         for (int i = 0; i < classes.length; i++) {

    84             JavaClass clazz = classes[i];

    85             out.println("<tr><td>");

    86             printClass(clazz);

    87             out.println("</td>");

    88             out.println("<td>");

    89             out.println(clazz.getInstancesCount(false));

    90             out.println("</td>");

    91             out.println("<td>");

    92             out.println(clazz.getTotalInstanceSize());

    93             out.println("</td></tr>");

    94         }

    95         out.println("</table>");

    96 

    97         endHtml();

    98     }

    99 }