1 /* 2 * Copyright (c) 2015, 2016, 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 com.sun.marlin.stats; 27 28 /** 29 * Statistics as long values 30 */ 31 public class StatLong { 32 33 public final String name; 34 public long count = 0l; 35 public long sum = 0l; 36 public long min = Integer.MAX_VALUE; 37 public long max = Integer.MIN_VALUE; 38 39 public StatLong(final String name) { 40 this.name = name; 41 } 42 43 public void reset() { 44 count = 0l; 45 sum = 0l; 46 min = Integer.MAX_VALUE; 47 max = Integer.MIN_VALUE; 48 } 49 50 public void add(final int val) { 51 count++; 52 sum += val; 53 if (val < min) { 54 min = val; 55 } 56 if (val > max) { 57 max = val; 58 } 59 } 60 61 public void add(final long val) { 62 count++; 63 sum += val; 64 if (val < min) { 65 min = val; 66 } 67 if (val > max) { 68 max = val; 69 } 70 } 71 72 @Override 73 public String toString() { 74 final StringBuilder sb = new StringBuilder(128); 75 toString(sb); 76 return sb.toString(); 77 } 78 79 public final StringBuilder toString(final StringBuilder sb) { 80 sb.append(name).append('[').append(count); 81 sb.append("] sum: ").append(sum).append(" avg: "); 82 sb.append(trimTo3Digits(((double) sum) / count)); 83 sb.append(" [").append(min).append(" | ").append(max).append("]"); 84 return sb; 85 } 86 87 /** 88 * Adjust the given double value to keep only 3 decimal digits 89 * 90 * @param value value to adjust 91 * @return double value with only 3 decimal digits 92 */ 93 public static double trimTo3Digits(final double value) { 94 return ((long) (1e3d * value)) / 1e3d; 95 } 96 } 97