JDK 11 jdk.internal.jvmstat.jmod - Internal JVM Stat Module

JDK 11 jdk.internal.JVM Stat.jmod is the JMOD file for JDK 11 Internal Jvmstat module.

JDK 11 Internal JVM Stat module compiled class files are stored in \fyicenter\jdk-11.0.1\jmods\jdk.internal.jvmstat.jmod.

JDK 11 Internal JVM Stat module compiled class files are also linked and stored in the \fyicenter\jdk-11.0.1\lib\modules JImage file.

JDK 11 Internal JVM Stat module source code files are stored in \fyicenter\jdk-11.0.1\lib\src.zip\jdk.internal.jvmstat.

You can click and view the content of each source code file in the list below.

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sun/jvmstat/perfdata/monitor/PerfByteArrayMonitor.java

/*
 * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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package sun.jvmstat.perfdata.monitor;

import sun.jvmstat.monitor.*;
import java.nio.ByteBuffer;

/**
 * Class for monitoring a PerfData Byte Array instrumentation object.
 *
 * This class is provided to support the PerfStringMonitor classes.
 * Instrumentation objects of this direct type currently cannot be
 * created or monitored.
 *
 * @author Brian Doherty
 * @since 1.5
 * @see sun.jvmstat.instrument.ByteArrayInstrument
 */
public class PerfByteArrayMonitor extends AbstractMonitor
       implements ByteArrayMonitor {

    /**
     * The buffer containing the data for the byte array instrument.
     */
    ByteBuffer bb;

    /**
     * Constructor to create a ByteArrayMonitor for the byte array instrument
     * represented by the data in the given buffer.
     *
     * @param name the name of the instrumentation object
     * @param u the units of measure attribute
     * @param v the variability attribute
     * @param supported support level indicator
     * @param bb the buffer containing the byte array instrument data
     * @param vectorLength the length of the vector.
     */
    public PerfByteArrayMonitor(String name, Units u, Variability v,
                                boolean supported, ByteBuffer bb,
                                int vectorLength) {
        super(name, u, v, supported, vectorLength);
        this.bb = bb;
    }

    /**
     * {@inheritDoc}
     * The object returned contains a byte[] with a copy of the current
     * elements of the ByteArrayInstrument.
     *
     * @return Object - a copy of the current value of the elements of the
     *                  byte array instrument. The return type is guaranteed
     *                  to be of type byte[].
     */
    public Object getValue() {
        return byteArrayValue();
    }

    /**
     * Get a copy of the elements of the byte array instrument.
     *
     * @return byte[] - a copy of the current value of the elements of the
     *                  byte array instrument.
     */
    public byte[] byteArrayValue() {
        bb.position(0);
        byte[] b = new byte[bb.limit()];

        // copy the bytes
        bb.get(b);

        return b;
    }

    /**
     * Get the current value of an element of the byte array instrument.
     *
     * @return byte - a copy of the current value of the element at index
     *                {@code index} of the byte array instrument.
     */
    public byte byteAt(int index) {
        bb.position(index);
        return bb.get();
    }

    /**
     * Get the maximum length of the byte array for this byte array instrument.
     *
     * @return int - the maximum length of the byte array.
     */
    public int getMaximumLength() {
        return bb.limit();
    }
}

sun/jvmstat/perfdata/monitor/PerfByteArrayMonitor.java

 

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