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 the LongInstrument. The 66 * return type is guaranteed to be of type Long. 67 */ 68 public Object getValue() { 69 return new Long(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 }