HotspotThreadMBean.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 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).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
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package sun.management;

import sun.management.counter.Counter;

/**
 * Hotspot internal management interface for the thread system.
 */
public interface HotspotThreadMBean {

    /**
     * Returns the current number of VM internal threads.
     *
     * @return the current number of VM internal threads.
     */
    public int getInternalThreadCount();

    /**
     * Returns a <tt>Map</tt> of the name of all VM internal threads
     * to the thread CPU time in nanoseconds.  The returned value is
     * of nanoseconds precision but not necessarily nanoseconds accuracy.
     * <p>
     *
     * @return a <tt>Map</tt> object of the name of all VM internal threads
     * to the thread CPU time in nanoseconds.
     *
     * @throws java.lang.UnsupportedOperationException if the Java virtual
     * machine does not support CPU time measurement.
     *
     * @see java.lang.management.ThreadMBean#isThreadCpuTimeSupported
     */
    public java.util.Map<String,Long> getInternalThreadCpuTimes();

    /**
     * Returns a list of internal counters maintained in the Java
     * virtual machine for the thread system.
     *
     * @return a list of internal counters maintained in the VM
     * for the thread system.
     */
    public java.util.List<Counter> getInternalThreadingCounters();
}