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