1 /*

     2  * Copyright (c) 2011, 2014, 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 sun.management;

    27 

    28 import com.sun.management.GarbageCollectionNotificationInfo;

    29 import com.sun.management.GcInfo;

    30 import java.lang.reflect.Method;

    31 import javax.management.openmbean.CompositeData;

    32 import javax.management.openmbean.CompositeType;

    33 import javax.management.openmbean.CompositeDataSupport;

    34 import javax.management.openmbean.OpenDataException;

    35 import javax.management.openmbean.OpenType;

    36 import javax.management.openmbean.SimpleType;

    37 import java.security.AccessController;

    38 import java.security.PrivilegedAction;

    39 import java.lang.reflect.Field;

    40 import java.util.HashMap;

    41 

    42 /**

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

    44  * This class avoids the performance penalty paid to the

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

    46  */

    47 public class GarbageCollectionNotifInfoCompositeData extends LazyCompositeData {

    48     private final GarbageCollectionNotificationInfo gcNotifInfo;

    49 

    50     public GarbageCollectionNotifInfoCompositeData(GarbageCollectionNotificationInfo info) {

    51         this.gcNotifInfo = info;

    52     }

    53 

    54     public GarbageCollectionNotificationInfo getGarbageCollectionNotifInfo() {

    55         return gcNotifInfo;

    56     }

    57 

    58     public static CompositeData toCompositeData(GarbageCollectionNotificationInfo info) {

    59         GarbageCollectionNotifInfoCompositeData gcnicd =

    60             new GarbageCollectionNotifInfoCompositeData(info);

    61         return gcnicd.getCompositeData();

    62     }

    63 

    64     private CompositeType getCompositeTypeByBuilder() {

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

    66                 public GcInfoBuilder run() {

    67                     try {

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

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

    70                         f.setAccessible(true);

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

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

    73                         return null;

    74                     }

    75                 }

    76             });

    77         CompositeType gict = null;

    78         synchronized(compositeTypeByBuilder) {

    79             gict = compositeTypeByBuilder.get(builder);

    80             if(gict == null) {

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

    82                     SimpleType.STRING,

    83                     SimpleType.STRING,

    84                     SimpleType.STRING,

    85                     builder.getGcInfoCompositeType(),

    86                 };

    87                 try {

    88                     final String typeName =

    89                         "sun.management.GarbageCollectionNotifInfoCompositeType";

    90                     gict = new CompositeType(typeName,

    91                                              "CompositeType for GC notification info",

    92                                              gcNotifInfoItemNames,

    93                                              gcNotifInfoItemNames,

    94                                              gcNotifInfoItemTypes);

    95                     compositeTypeByBuilder.put(builder,gict);

    96                 } catch (OpenDataException e) {

    97                     // shouldn't reach here

    98                     throw Util.newException(e);

    99                 }

   100             }

   101         }

   102         return gict;

   103     }

   104 

   105     protected CompositeData getCompositeData() {

   106         // CONTENTS OF THIS ARRAY MUST BE SYNCHRONIZED WITH

   107         // gcNotifInfoItemNames!

   108         final Object[] gcNotifInfoItemValues;

   109         gcNotifInfoItemValues = new Object[] {

   110             gcNotifInfo.getGcName(),

   111             gcNotifInfo.getGcAction(),

   112             gcNotifInfo.getGcCause(),

   113             GcInfoCompositeData.toCompositeData(gcNotifInfo.getGcInfo())

   114         };

   115 

   116         CompositeType gict = getCompositeTypeByBuilder();

   117 

   118         try {

   119             return new CompositeDataSupport(gict,

   120                                             gcNotifInfoItemNames,

   121                                             gcNotifInfoItemValues);

   122         } catch (OpenDataException e) {

   123             // Should never reach here

   124             throw new AssertionError(e);

   125         }

   126     }

   127 

   128     //    private static MappedMXBeanType gcInfoMapType;

   129     private static final String GC_NAME = "gcName";

   130     private static final String GC_ACTION = "gcAction";

   131     private static final String GC_CAUSE = "gcCause";

   132     private static final String GC_INFO     = "gcInfo";

   133     private static final String[] gcNotifInfoItemNames = {

   134         GC_NAME,

   135         GC_ACTION,

   136         GC_CAUSE,

   137         GC_INFO

   138     };

   139     private static HashMap<GcInfoBuilder,CompositeType> compositeTypeByBuilder =

   140         new HashMap<>();

   141 

   142     public static String getGcName(CompositeData cd) {

   143         String gcname = getString(cd, GC_NAME);

   144         if (gcname == null) {

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

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

   147         }

   148         return gcname;

   149     }

   150 

   151     public static String getGcAction(CompositeData cd) {

   152         String gcaction = getString(cd, GC_ACTION);

   153         if (gcaction == null) {

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

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

   156         }

   157         return gcaction;

   158     }

   159 

   160     public static String getGcCause(CompositeData cd) {

   161         String gccause = getString(cd, GC_CAUSE);

   162         if (gccause == null) {

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

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

   165         }

   166         return gccause;

   167     }

   168 

   169     public static GcInfo getGcInfo(CompositeData cd) {

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

   171         return GcInfo.from(gcInfoData);

   172     }

   173 

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

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

   176      * names and types).

   177      */

   178     public static void validateCompositeData(CompositeData cd) {

   179         if (cd == null) {

   180             throw new NullPointerException("Null CompositeData");

   181         }

   182 

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

   184             throw new IllegalArgumentException(

   185                 "Unexpected composite type for GarbageCollectionNotificationInfo");

   186         }

   187     }

   188 

   189     // This is only used for validation.

   190     private static CompositeType baseGcNotifInfoCompositeType = null;

   191     private static synchronized CompositeType getBaseGcNotifInfoCompositeType() {

   192         if (baseGcNotifInfoCompositeType == null) {

   193             try {

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

   195                     SimpleType.STRING,

   196                     SimpleType.STRING,

   197                     SimpleType.STRING,

   198                     GcInfoCompositeData.getBaseGcInfoCompositeType()

   199                 };

   200                 baseGcNotifInfoCompositeType =

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

   202                                       "CompositeType for Base GarbageCollectionNotificationInfo",

   203                                       gcNotifInfoItemNames,

   204                                       gcNotifInfoItemNames,

   205                                       baseGcNotifInfoItemTypes);

   206             } catch (OpenDataException e) {

   207                 // shouldn't reach here

   208                 throw Util.newException(e);

   209             }

   210         }

   211         return baseGcNotifInfoCompositeType;

   212     }

   213 

   214     private static final long serialVersionUID = -1805123446483771292L;

   215 }