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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * 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).
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package sun.management;

import java.util.Map;
import java.util.HashMap;
import sun.management.counter.Counter;


Implementation class of HotspotThreadMBean interface. Internal, uncommitted management interface for Hotspot threading system.
/** * Implementation class of HotspotThreadMBean interface. * * Internal, uncommitted management interface for Hotspot threading * system. */
class HotspotThread implements HotspotThreadMBean { private VMManagement jvm;
Constructor of HotspotThread class.
/** * Constructor of HotspotThread class. */
HotspotThread(VMManagement vm) { jvm = vm; } public native int getInternalThreadCount(); public Map<String, Long> getInternalThreadCpuTimes() { int count = getInternalThreadCount(); if (count == 0) { return java.util.Collections.emptyMap(); } String[] names = new String[count]; long[] times = new long[count]; int numThreads = getInternalThreadTimes0(names, times); Map<String, Long> result = new HashMap<>(numThreads); for (int i = 0; i < numThreads; i++) { result.put(names[i], times[i]); } return result; } public native int getInternalThreadTimes0(String[] names, long[] times); // Performance counter support private static final String JAVA_THREADS = "java.threads."; private static final String COM_SUN_THREADS = "com.sun.threads."; private static final String SUN_THREADS = "sun.threads."; private static final String THREADS_COUNTER_NAME_PATTERN = JAVA_THREADS + "|" + COM_SUN_THREADS + "|" + SUN_THREADS; public java.util.List<Counter> getInternalThreadingCounters() { return jvm.getInternalCounters(THREADS_COUNTER_NAME_PATTERN); } }