1 /* 2 * Copyright (c) 2003, 2012, 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 java.util.Map; 29 import java.util.HashMap; 30 import sun.management.counter.Counter; 31 32 33 /** 34 * Implementation class of HotspotThreadMBean interface. 35 * 36 * Internal, uncommitted management interface for Hotspot threading 37 * system. 38 */ 39 class HotspotThread 40 implements HotspotThreadMBean { 41 42 private VMManagement jvm; 43 44 /** 45 * Constructor of HotspotThread class. 46 */ 47 HotspotThread(VMManagement vm) { 48 jvm = vm; 49 } 50 51 public native int getInternalThreadCount(); 52 53 public Map<String, Long> getInternalThreadCpuTimes() { 54 int count = getInternalThreadCount(); 55 if (count == 0) { 56 return java.util.Collections.emptyMap(); 57 } 58 String[] names = new String[count]; 59 long[] times = new long[count]; 60 int numThreads = getInternalThreadTimes0(names, times); 61 Map<String, Long> result = new HashMap<>(numThreads); 62 for (int i = 0; i < numThreads; i++) { 63 result.put(names[i], new Long(times[i])); 64 } 65 return result; 66 } 67 public native int getInternalThreadTimes0(String[] names, long[] times); 68 69 // Performance counter support 70 private static final String JAVA_THREADS = "java.threads."; 71 private static final String COM_SUN_THREADS = "com.sun.threads."; 72 private static final String SUN_THREADS = "sun.threads."; 73 private static final String THREADS_COUNTER_NAME_PATTERN = 74 JAVA_THREADS + "|" + COM_SUN_THREADS + "|" + SUN_THREADS; 75 76 public java.util.List<Counter> getInternalThreadingCounters() { 77 return jvm.getInternalCounters(THREADS_COUNTER_NAME_PATTERN); 78 } 79 }