1 /* 2 * Copyright (c) 2009, 2013, 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 27 package com.sun.org.glassfish.external.statistics.impl; 28 import com.sun.org.glassfish.external.statistics.CountStatistic; 29 import java.util.Map; 30 import java.lang.reflect.*; 31 32 /** 33 * @author Sreenivas Munnangi 34 */ 35 public final class CountStatisticImpl extends StatisticImpl 36 implements CountStatistic, InvocationHandler { 37 38 private long count = 0L; 39 private final long initCount; 40 41 private final CountStatistic cs = 42 (CountStatistic) Proxy.newProxyInstance( 43 CountStatistic.class.getClassLoader(), 44 new Class[] { CountStatistic.class }, 45 this); 46 47 public CountStatisticImpl(long countVal, String name, String unit, 48 String desc, long sampleTime, long startTime) { 49 super(name, unit, desc, startTime, sampleTime); 50 count = countVal; 51 initCount = countVal; 52 } 53 54 public CountStatisticImpl(String name, String unit, String desc) { 55 this(0L, name, unit, desc, -1L, System.currentTimeMillis()); 56 } 57 58 public synchronized CountStatistic getStatistic() { 59 return cs; 60 } 61 62 public synchronized Map getStaticAsMap() { 63 Map m = super.getStaticAsMap(); 64 m.put("count", getCount()); 65 return m; 66 } 67 68 public synchronized String toString() { 69 return super.toString() + NEWLINE + "Count: " + getCount(); 70 } 71 72 public synchronized long getCount() { 73 return count; 74 } 75 76 public synchronized void setCount(long countVal) { 77 count = countVal; 78 sampleTime = System.currentTimeMillis(); 79 } 80 81 public synchronized void increment() { 82 count++; 83 sampleTime = System.currentTimeMillis(); 84 } 85 86 public synchronized void increment(long delta) { 87 count = count + delta; 88 sampleTime = System.currentTimeMillis(); 89 } 90 91 public synchronized void decrement() { 92 count--; 93 sampleTime = System.currentTimeMillis(); 94 } 95 96 @Override 97 public synchronized void reset() { 98 super.reset(); 99 count = initCount; 100 sampleTime = -1L; 101 } 102 103 // todo: equals implementation 104 public Object invoke(Object proxy, Method m, Object[] args) throws Throwable { 105 checkMethod(m); 106 107 Object result; 108 try { 109 result = m.invoke(this, args); 110 } catch (InvocationTargetException e) { 111 throw e.getTargetException(); 112 } catch (Exception e) { 113 throw new RuntimeException("unexpected invocation exception: " + 114 e.getMessage()); 115 } 116 return result; 117 } 118 }