1 /*

     2  * Copyright (c) 2017, 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.

     8  *

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

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

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

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

    13  * accompanied this code).

    14  *

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

    16  * 2 along with this work; if not, write to the Free Software Foundation,

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

    18  *

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

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

    21  * questions.

    22  */

    23 package org.graalvm.compiler.hotspot.jmx;

    24 

    25 import java.util.ArrayList;

    26 import java.util.Collections;

    27 import java.util.List;

    28 import java.util.Map;

    29 import java.util.Set;

    30 import jdk.vm.ci.runtime.JVMCI;

    31 import jdk.vm.ci.runtime.JVMCICompiler;

    32 import jdk.vm.ci.runtime.JVMCIRuntime;

    33 import org.graalvm.compiler.hotspot.HotSpotGraalCompiler;

    34 import sun.management.spi.PlatformMBeanProvider;

    35 import sun.management.spi.PlatformMBeanProvider.PlatformComponent;

    36 

    37 public final class GraalMBeans extends PlatformMBeanProvider {

    38     @Override

    39     public List<PlatformComponent<?>> getPlatformComponentList() {

    40         List<PlatformComponent<?>> components = new ArrayList<>();

    41         try {

    42             Object bean = findGraalRuntimeBean();

    43             if (bean != null) {

    44                 components.add(new HotSpotRuntimeMBeanComponent(bean));

    45             }

    46         } catch (InternalError | LinkageError err) {

    47             // go on and ignore

    48         }

    49         return components;

    50     }

    51 

    52     public static Object findGraalRuntimeBean() {

    53         JVMCIRuntime r = JVMCI.getRuntime();

    54         JVMCICompiler c = r.getCompiler();

    55         if (c instanceof HotSpotGraalCompiler) {

    56             return ((HotSpotGraalCompiler) c).mbean();

    57         }

    58         return null;

    59     }

    60 

    61     private static final class HotSpotRuntimeMBeanComponent implements PlatformComponent<Object> {

    62 

    63         private final String name;

    64         private final Object mbean;

    65 

    66         HotSpotRuntimeMBeanComponent(Object mbean) {

    67             this.name = "org.graalvm.compiler.hotspot:type=Options";

    68             this.mbean = mbean;

    69         }

    70 

    71         @Override

    72         public Set<Class<?>> mbeanInterfaces() {

    73             return Collections.emptySet();

    74         }

    75 

    76         @Override

    77         public Set<String> mbeanInterfaceNames() {

    78             return Collections.emptySet();

    79         }

    80 

    81         @Override

    82         public String getObjectNamePattern() {

    83             return name;

    84         }

    85 

    86         @Override

    87         public Map<String, Object> nameToMBeanMap() {

    88             return Collections.<String, Object>singletonMap(name, mbean);

    89         }

    90     }

    91 }