Thu, 31 Aug 2017 15:18:52 +0800
merge
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 */
28 package com.sun.org.glassfish.external.statistics.impl;
29 import com.sun.org.glassfish.external.statistics.RangeStatistic;
30 import java.util.Map;
31 import java.lang.reflect.*;
33 /**
34 * @author Sreenivas Munnangi
35 */
36 public final class RangeStatisticImpl extends StatisticImpl
37 implements RangeStatistic, InvocationHandler {
39 private long currentVal = 0L;
40 private long highWaterMark = Long.MIN_VALUE;
41 private long lowWaterMark = Long.MAX_VALUE;
42 private final long initCurrentVal;
43 private final long initHighWaterMark;
44 private final long initLowWaterMark;
46 private final RangeStatistic rs =
47 (RangeStatistic) Proxy.newProxyInstance(
48 RangeStatistic.class.getClassLoader(),
49 new Class[] { RangeStatistic.class },
50 this);
52 public RangeStatisticImpl(long curVal, long highMark, long lowMark,
53 String name, String unit, String desc,
54 long startTime, long sampleTime) {
55 super(name, unit, desc, startTime, sampleTime);
56 currentVal = curVal;
57 initCurrentVal = curVal;
58 highWaterMark = highMark;
59 initHighWaterMark = highMark;
60 lowWaterMark = lowMark;
61 initLowWaterMark = lowMark;
62 }
64 public synchronized RangeStatistic getStatistic() {
65 return rs;
66 }
68 public synchronized Map getStaticAsMap() {
69 Map m = super.getStaticAsMap();
70 m.put("current", getCurrent());
71 m.put("lowwatermark", getLowWaterMark());
72 m.put("highwatermark", getHighWaterMark());
73 return m;
74 }
76 public synchronized long getCurrent() {
77 return currentVal;
78 }
80 public synchronized void setCurrent(long curVal) {
81 currentVal = curVal;
82 lowWaterMark = (curVal >= lowWaterMark ? lowWaterMark : curVal);
83 highWaterMark = (curVal >= highWaterMark ? curVal : highWaterMark);
84 sampleTime = System.currentTimeMillis();
85 }
87 /**
88 * Returns the highest value of this statistic, since measurement started.
89 */
90 public synchronized long getHighWaterMark() {
91 return highWaterMark;
92 }
94 public synchronized void setHighWaterMark(long hwm) {
95 highWaterMark = hwm;
96 }
98 /**
99 * Returns the lowest value of this statistic, since measurement started.
100 */
101 public synchronized long getLowWaterMark() {
102 return lowWaterMark;
103 }
105 public synchronized void setLowWaterMark(long lwm) {
106 lowWaterMark = lwm;
107 }
109 @Override
110 public synchronized void reset() {
111 super.reset();
112 currentVal = initCurrentVal;
113 highWaterMark = initHighWaterMark;
114 lowWaterMark = initLowWaterMark;
115 sampleTime = -1L;
116 }
118 public synchronized String toString() {
119 return super.toString() + NEWLINE +
120 "Current: " + getCurrent() + NEWLINE +
121 "LowWaterMark: " + getLowWaterMark() + NEWLINE +
122 "HighWaterMark: " + getHighWaterMark();
123 }
125 // todo: equals implementation
126 public Object invoke(Object proxy, Method m, Object[] args) throws Throwable {
127 checkMethod(m);
129 Object result;
130 try {
131 result = m.invoke(this, args);
132 } catch (InvocationTargetException e) {
133 throw e.getTargetException();
134 } catch (Exception e) {
135 throw new RuntimeException("unexpected invocation exception: " +
136 e.getMessage());
137 }
138 return result;
139 }
140 }