HotspotRuntimeMBean.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
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 * 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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package sun.management;

import sun.management.counter.Counter;

/**
 * Hotspot internal management interface for the runtime system.
 *
 * This management interface is internal and uncommitted
 * and subject to change without notice.
 */
public interface HotspotRuntimeMBean {

    /**
     * Returns the number of safepoints taken place since the Java
     * virtual machine started.
     *
     * @return the number of safepoints taken place since the Java
     * virtual machine started.
     */
    public long getSafepointCount();

    /**
     * Returns the accumulated time spent at safepoints in milliseconds.
     * This is the accumulated elapsed time that the application has
     * been stopped for safepoint operations.
     *
     * @return the accumulated time spent at safepoints in milliseconds.
     */
    public long getTotalSafepointTime();

    /**
     * Returns the accumulated time spent getting to safepoints in milliseconds.
     *
     * @return the accumulated time spent getting to safepoints in milliseconds.
     */
    public long getSafepointSyncTime();

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