1 /*

     2  * Copyright (c) 2011, 2015, 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 package com.sun.management.internal;

    27 

    28 import com.sun.management.GarbageCollectionNotificationInfo;

    29 import com.sun.management.GcInfo;

    30 import javax.management.openmbean.CompositeData;

    31 import javax.management.openmbean.CompositeType;

    32 import javax.management.openmbean.CompositeDataSupport;

    33 import javax.management.openmbean.OpenDataException;

    34 import javax.management.openmbean.OpenType;

    35 import javax.management.openmbean.SimpleType;

    36 import java.security.AccessController;

    37 import java.security.PrivilegedAction;

    38 import java.lang.reflect.Field;

    39 import java.util.HashMap;

    40 import sun.management.LazyCompositeData;

    41 import static sun.management.LazyCompositeData.getString;

    42 import sun.management.Util;

    43 

    44 /**

    45  * A CompositeData for GarbageCollectionNotificationInfo for the local management support.

    46  * This class avoids the performance penalty paid to the

    47  * construction of a CompositeData use in the local case.

    48  */

    49 public class GarbageCollectionNotifInfoCompositeData extends LazyCompositeData {

    50     private final GarbageCollectionNotificationInfo gcNotifInfo;

    51 

    52     public GarbageCollectionNotifInfoCompositeData(GarbageCollectionNotificationInfo info) {

    53         this.gcNotifInfo = info;

    54     }

    55 

    56     public GarbageCollectionNotificationInfo getGarbageCollectionNotifInfo() {

    57         return gcNotifInfo;

    58     }

    59 

    60     public static CompositeData toCompositeData(GarbageCollectionNotificationInfo info) {

    61         GarbageCollectionNotifInfoCompositeData gcnicd =

    62             new GarbageCollectionNotifInfoCompositeData(info);

    63         return gcnicd.getCompositeData();

    64     }

    65 

    66     private CompositeType getCompositeTypeByBuilder() {

    67         final GcInfoBuilder builder = AccessController.doPrivileged (new PrivilegedAction<GcInfoBuilder>() {

    68                 public GcInfoBuilder run() {

    69                     try {

    70                         Class<?> cl = Class.forName("com.sun.management.GcInfo");

    71                         Field f = cl.getDeclaredField("builder");

    72                         f.setAccessible(true);

    73                         return (GcInfoBuilder)f.get(gcNotifInfo.getGcInfo());

    74                     } catch(ClassNotFoundException | NoSuchFieldException | IllegalAccessException e) {

    75                         return null;

    76                     }

    77                 }

    78             });

    79         CompositeType gict = null;

    80         synchronized(compositeTypeByBuilder) {

    81             gict = compositeTypeByBuilder.get(builder);

    82             if(gict == null) {

    83                 OpenType<?>[] gcNotifInfoItemTypes = new OpenType<?>[] {

    84                     SimpleType.STRING,

    85                     SimpleType.STRING,

    86                     SimpleType.STRING,

    87                     builder.getGcInfoCompositeType(),

    88                 };

    89                 try {

    90                     final String typeName =

    91                         "sun.management.GarbageCollectionNotifInfoCompositeType";

    92                     gict = new CompositeType(typeName,

    93                                              "CompositeType for GC notification info",

    94                                              gcNotifInfoItemNames,

    95                                              gcNotifInfoItemNames,

    96                                              gcNotifInfoItemTypes);

    97                     compositeTypeByBuilder.put(builder,gict);

    98                 } catch (OpenDataException e) {

    99                     // shouldn't reach here

   100                     throw new RuntimeException(e);

   101                 }

   102             }

   103         }

   104         return gict;

   105     }

   106 

   107     protected CompositeData getCompositeData() {

   108         // CONTENTS OF THIS ARRAY MUST BE SYNCHRONIZED WITH

   109         // gcNotifInfoItemNames!

   110         final Object[] gcNotifInfoItemValues;

   111         gcNotifInfoItemValues = new Object[] {

   112             gcNotifInfo.getGcName(),

   113             gcNotifInfo.getGcAction(),

   114             gcNotifInfo.getGcCause(),

   115             GcInfoCompositeData.toCompositeData(gcNotifInfo.getGcInfo())

   116         };

   117 

   118         CompositeType gict = getCompositeTypeByBuilder();

   119 

   120         try {

   121             return new CompositeDataSupport(gict,

   122                                             gcNotifInfoItemNames,

   123                                             gcNotifInfoItemValues);

   124         } catch (OpenDataException e) {

   125             // Should never reach here

   126             throw new AssertionError(e);

   127         }

   128     }

   129 

   130     //    private static MappedMXBeanType gcInfoMapType;

   131     private static final String GC_NAME = "gcName";

   132     private static final String GC_ACTION = "gcAction";

   133     private static final String GC_CAUSE = "gcCause";

   134     private static final String GC_INFO     = "gcInfo";

   135     private static final String[] gcNotifInfoItemNames = {

   136         GC_NAME,

   137         GC_ACTION,

   138         GC_CAUSE,

   139         GC_INFO

   140     };

   141     private static HashMap<GcInfoBuilder,CompositeType> compositeTypeByBuilder =

   142         new HashMap<>();

   143 

   144     public static String getGcName(CompositeData cd) {

   145         String gcname = getString(cd, GC_NAME);

   146         if (gcname == null) {

   147             throw new IllegalArgumentException("Invalid composite data: " +

   148                 "Attribute " + GC_NAME + " has null value");

   149         }

   150         return gcname;

   151     }

   152 

   153     public static String getGcAction(CompositeData cd) {

   154         String gcaction = getString(cd, GC_ACTION);

   155         if (gcaction == null) {

   156             throw new IllegalArgumentException("Invalid composite data: " +

   157                 "Attribute " + GC_ACTION + " has null value");

   158         }

   159         return gcaction;

   160     }

   161 

   162     public static String getGcCause(CompositeData cd) {

   163         String gccause = getString(cd, GC_CAUSE);

   164         if (gccause == null) {

   165             throw new IllegalArgumentException("Invalid composite data: " +

   166                 "Attribute " + GC_CAUSE + " has null value");

   167         }

   168         return gccause;

   169     }

   170 

   171     public static GcInfo getGcInfo(CompositeData cd) {

   172         CompositeData gcInfoData = (CompositeData) cd.get(GC_INFO);

   173         return GcInfo.from(gcInfoData);

   174     }

   175 

   176     /** Validate if the input CompositeData has the expected

   177      * CompositeType (i.e. contain all attributes with expected

   178      * names and types).

   179      */

   180     public static void validateCompositeData(CompositeData cd) {

   181         if (cd == null) {

   182             throw new NullPointerException("Null CompositeData");

   183         }

   184 

   185         if (!isTypeMatched( getBaseGcNotifInfoCompositeType(), cd.getCompositeType())) {

   186             throw new IllegalArgumentException(

   187                 "Unexpected composite type for GarbageCollectionNotificationInfo");

   188         }

   189     }

   190 

   191     // This is only used for validation.

   192     private static CompositeType baseGcNotifInfoCompositeType = null;

   193     private static synchronized CompositeType getBaseGcNotifInfoCompositeType() {

   194         if (baseGcNotifInfoCompositeType == null) {

   195             try {

   196                 OpenType<?>[] baseGcNotifInfoItemTypes = new OpenType<?>[] {

   197                     SimpleType.STRING,

   198                     SimpleType.STRING,

   199                     SimpleType.STRING,

   200                     GcInfoCompositeData.getBaseGcInfoCompositeType()

   201                 };

   202                 baseGcNotifInfoCompositeType =

   203                     new CompositeType("sun.management.BaseGarbageCollectionNotifInfoCompositeType",

   204                                       "CompositeType for Base GarbageCollectionNotificationInfo",

   205                                       gcNotifInfoItemNames,

   206                                       gcNotifInfoItemNames,

   207                                       baseGcNotifInfoItemTypes);

   208             } catch (OpenDataException e) {

   209                 // shouldn't reach here

   210                 throw new RuntimeException(e);

   211             }

   212         }

   213         return baseGcNotifInfoCompositeType;

   214     }

   215 

   216     private static final long serialVersionUID = -1805123446483771292L;

   217 }