1 /* 2 * Copyright (c) 2003, 2004, 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 sun.management.counter.Counter; 29 30 /** 31 * Hotspot internal management interface for the thread system. 32 */ 33 public interface HotspotThreadMBean { 34 35 /** 36 * Returns the current number of VM internal threads. 37 * 38 * @return the current number of VM internal threads. 39 */ 40 public int getInternalThreadCount(); 41 42 /** 43 * Returns a {@code Map} of the name of all VM internal threads 44 * to the thread CPU time in nanoseconds. The returned value is 45 * of nanoseconds precision but not necessarily nanoseconds accuracy. 46 * 47 * @return a {@code Map} object of the name of all VM internal threads 48 * to the thread CPU time in nanoseconds. 49 * 50 * @throws java.lang.UnsupportedOperationException if the Java virtual 51 * machine does not support CPU time measurement. 52 * 53 * @see java.lang.management.ThreadMBean#isThreadCpuTimeSupported 54 */ 55 public java.util.Map<String,Long> getInternalThreadCpuTimes(); 56 57 /** 58 * Returns a list of internal counters maintained in the Java 59 * virtual machine for the thread system. 60 * 61 * @return a list of internal counters maintained in the VM 62 * for the thread system. 63 */ 64 public java.util.List<Counter> getInternalThreadingCounters(); 65 }