1 /*

     2  * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 package sun.jvmstat.perfdata.monitor;

    27 

    28 import sun.jvmstat.monitor.*;

    29 import java.nio.LongBuffer;

    30 

    31 /**

    32  * Class for monitoring a PerfData Long instrument.

    33  *

    34  * @author Brian Doherty

    35  * @since 1.5

    36  */

    37 public class PerfLongMonitor extends AbstractMonitor implements LongMonitor {

    38 

    39     /**

    40      * The buffer containing the data for the long instrument.

    41      */

    42     LongBuffer lb;

    43 

    44     /**

    45      * Constructor to create a LongMonitor object for the long instrument

    46      * represented by the data in the given buffer.

    47      *

    48      * @param name the name of the long instrument

    49      * @param u the units of measure attribute

    50      * @param v the variability attribute

    51      * @param supported support level indicator

    52      * @param lb the buffer containing the long instrument data.

    53      */

    54     public PerfLongMonitor(String name, Units u, Variability v,

    55                            boolean supported, LongBuffer lb) {

    56         super(name, u, v, supported);

    57         this.lb = lb;

    58     }

    59 

    60     /**

    61      * {@inheritDoc}

    62      * The object returned contains a Long object containing the

    63      * current value of the LongInstrument.

    64      *

    65      * @return Object - the current value of the LongInstrument. The

    66      *                  return type is guaranteed to be of type Long.

    67      */

    68     public Object getValue() {

    69         return Long.valueOf(lb.get(0));

    70     }

    71 

    72     /**

    73      * Return the current value of the LongInstrument as an long.

    74      *

    75      * @return long - the current value of the LongInstrument

    76      */

    77     public long longValue() {

    78         return lb.get(0);

    79     }

    80 }