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 }