/*

 * Copyright (c) 2003, 2004, 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 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 {@code Map} 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.

     *

     * @return a {@code Map} 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();

}