/* * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package sun.management; import java.util.List;import sun.management.counter.Counter;/** * An interface for the monitoring and management of the * Java virtual machine. */public interface VMManagement {     // Optional supports    public boolean isCompilationTimeMonitoringSupported();    public boolean isThreadContentionMonitoringSupported();    public boolean isThreadContentionMonitoringEnabled();    public boolean isCurrentThreadCpuTimeSupported();    public boolean isOtherThreadCpuTimeSupported();    public boolean isThreadCpuTimeEnabled();    public boolean isBootClassPathSupported();    public boolean isObjectMonitorUsageSupported();    public boolean isSynchronizerUsageSupported();    public boolean isThreadAllocatedMemorySupported();    public boolean isThreadAllocatedMemoryEnabled();    public boolean isGcNotificationSupported();     // Class Loading Subsystem    public long    getTotalClassCount();    public int     getLoadedClassCount();    public long    getUnloadedClassCount();    public boolean getVerboseClass();     // Memory Subsystem    public boolean getVerboseGC();     // Runtime Subsystem    public String  getManagementVersion();    public String  getVmId();    public String  getVmName();    public String  getVmVendor();    public String  getVmVersion();    public String  getVmSpecName();    public String  getVmSpecVendor();    public String  getVmSpecVersion();    public String  getClassPath();    public String  getLibraryPath();    public String  getBootClassPath();    public List<String> getVmArguments();    public long    getStartupTime();    public int     getAvailableProcessors();     // Compilation Subsystem    public String  getCompilerName();    public long    getTotalCompileTime();     // Thread Subsystem    public long    getTotalThreadCount();    public int     getLiveThreadCount();    public int     getPeakThreadCount();    public int     getDaemonThreadCount();     // Operating System    public String  getOsName();    public String  getOsArch();    public String  getOsVersion();     // Hotspot-specific Runtime support    public long    getSafepointCount();    public long    getTotalSafepointTime();    public long    getSafepointSyncTime();    public long    getTotalApplicationNonStoppedTime();     public long    getLoadedClassSize();    public long    getUnloadedClassSize();    public long    getClassLoadingTime();    public long    getMethodDataSize();    public long    getInitializedClassCount();    public long    getClassInitializationTime();    public long    getClassVerificationTime();     // Performance counter support    public List<Counter>   getInternalCounters(String pattern);}