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 28 package com.sun.org.glassfish.external.statistics.impl; 29 import com.sun.org.glassfish.external.statistics.StringStatistic; 30 import java.util.Map; 31 import java.lang.reflect.*; 32 33 /** 34 * @author Sreenivas Munnangi 35 */ 36 public final class StringStatisticImpl extends StatisticImpl 37 implements StringStatistic, InvocationHandler { 38 39 private volatile String str = null; 40 private final String initStr; 41 42 private final StringStatistic ss = 43 (StringStatistic) Proxy.newProxyInstance( 44 StringStatistic.class.getClassLoader(), 45 new Class[] { StringStatistic.class }, 46 this); 47 48 public StringStatisticImpl(String str, String name, String unit, 49 String desc, long sampleTime, long startTime) { 50 super(name, unit, desc, startTime, sampleTime); 51 this.str = str; 52 initStr = str; 53 } 54 55 public StringStatisticImpl(String name, String unit, String desc) { 56 this("", name, unit, desc, System.currentTimeMillis(), System.currentTimeMillis()); 57 } 58 59 public synchronized StringStatistic getStatistic() { 60 return ss; 61 } 62 63 public synchronized Map getStaticAsMap() { 64 Map m = super.getStaticAsMap(); 65 if (getCurrent() != null) { 66 m.put("current", getCurrent()); 67 } 68 return m; 69 } 70 71 public synchronized String toString() { 72 return super.toString() + NEWLINE + "Current-value: " + getCurrent(); 73 } 74 75 public String getCurrent() { 76 return str; 77 } 78 79 public void setCurrent(String str) { 80 this.str = str; 81 sampleTime = System.currentTimeMillis(); 82 } 83 84 @Override 85 public synchronized void reset() { 86 super.reset(); 87 this.str = initStr; 88 sampleTime = -1L; 89 } 90 91 // todo: equals implementation 92 public Object invoke(Object proxy, Method m, Object[] args) throws Throwable { 93 checkMethod(m); 94 95 Object result; 96 try { 97 result = m.invoke(this, args); 98 } catch (InvocationTargetException e) { 99 throw e.getTargetException(); 100 } catch (Exception e) { 101 throw new RuntimeException("unexpected invocation exception: " + 102 e.getMessage()); 103 } 104 return result; 105 } 106 }