1 /* 2 * Copyright (c) 2003, 2004, 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.management.counter; 27 28 /** 29 * The base class for a performance counter. 30 * 31 * @author Brian Doherty 32 */ 33 public interface Counter extends java.io.Serializable { 34 35 /** 36 * Returns the name of this performance counter 37 */ 38 public String getName(); 39 40 /** 41 * Returns the Units for this performance counter 42 */ 43 public Units getUnits(); 44 45 /** 46 * Returns the Variability for this performance counter 47 */ 48 public Variability getVariability(); 49 50 /** 51 * Returns true if this performance counter is a vector 52 */ 53 public boolean isVector(); 54 55 /** 56 * Returns the length of the vector 57 */ 58 public int getVectorLength(); 59 60 /** 61 * Returns an Object that encapsulates the data value of this counter 62 */ 63 public Object getValue(); 64 65 /** 66 * Returns {@code true} if this counter is an internal counter. 67 */ 68 public boolean isInternal(); 69 70 /** 71 * Return the flags associated with the counter. 72 */ 73 public int getFlags(); 74 }