Java example source code file (PerfStringVariableMonitor.java)

This example Java source code file (PerfStringVariableMonitor.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

bytebuffer, nio, perfstringmonitor, perfstringvariablemonitor

The PerfStringVariableMonitor.java Java example source code

/*
 * Copyright (c) 2004, 2010, 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.jvmstat.perfdata.monitor;

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

/**
 *
 * Class for monitoring a variable PerfData String instrument.
 * The current value of a variable string instrument changes over time.
 *
 * @author Brian Doherty
 * @since 1.5
 */
public class PerfStringVariableMonitor extends PerfStringMonitor {

    /**
     * Constructor to create a StringMonitor object for the variable string
     * instrument represented by the data in the given buffer.
     *
     * @param name the name of the string instrument
     * @param supported support level indicator
     * @param bb the buffer containing the string instrument data.
     */
    public PerfStringVariableMonitor(String name, boolean supported,
                                     ByteBuffer bb) {
        this(name, supported, bb, bb.limit());
    }

    /**
     * Constructor to create a StringMonitor object for the variable
     * string instrument represented by the data in the given buffer.
     *
     * @param name the name of the string instrument
     * @param bb the buffer containing the string instrument data.
     * @param supported support level indicator
     * @param maxLength the maximum length of the string data.
     */
    public PerfStringVariableMonitor(String name, boolean supported,
                                     ByteBuffer bb, int maxLength) {
        // account for the null terminator by adding 1 to maxLength
        super(name, Variability.VARIABLE, supported, bb, maxLength+1);
    }
}